广东海洋大学教师论文被SCI-Expanded 收录情况最新统计
-2006

 

检索数据库:Science Citation Index Expanded

检索年代:2006

检索策略:AD= zhanjiang ocean univ/guangdong ocean univ

检索日期: 200714

检中条数27

 

1Expression of basic fibroblast growth factor results in the decrease of myostatin mRNA in murine C 2C 12 myoblasts

 

Author(s): Liu HZ (Liu, Hua-Zhong), Li Q (Li, Qing), Yang XY (Yang, Xing-Yuan), Liu L (Liu, Lin), Liu L (Liu, Lei), An XR (An, Xiao-Rong), Chen YF (Chen, Yong-Fu)

Source: ACTA BIOCHIMICA ET BIOPHYSICA SINICA 38 (10): 697-703 OCT 2006

Document Type: Article

Language: English

Cited References: 33     

Times Cited: 0     

Abstract: During the development and regeneration of skeletal muscle, many growth factors, such as basic fibroblast growth factor (bFGF, FGF-2) and myostatin, have been shown to play regulating roles. bFGF contributes to promote proliferation and to inhibit differentiation of skeletal muscle, whereas myostatin plays a series of contrasting roles. In order to elucidate whether the expression of bFGF has any relationship with the expression of myostatin in skeletal muscle cells, we constructed a eukaryotic expression vector for the expression of exogenous bFGF in murine C 2C 12 myoblasts. Quantitative RT-PCR assays indicated that with the increase of the expression of exogenous bFGF gene, the expression of endogenous myostatin gene was suppressed at mRNA level and protein level.

Author Keywords: basic fibroblast growth factor; myostatin; murine C 2C 12 myoblast; real time RT-PCR

KeyWords Plus: BETA SUPERFAMILY MEMBER; SKELETAL-MUSCLE; IN-VIVO; REGENERATION; GENE; RAT; DIFFERENTIATION; PROLIFERATION; CELLS; INHIBITION

Addresses: An XR (reprint author), China Agr Univ, Coll Biol Sci, State Key Lab Agrobiotechnol, Beijing 100094, Peoples R China
China Agr Univ, Coll Biol Sci, State Key Lab Agrobiotechnol,
Beijing 100094, Peoples R China
Guangdong Ocean Univ, Modern Biochem Ctr,
Zhanjiang 524088, Peoples R China

E-mail Addresses: xra@cau.edu.cn

Publisher: BLACKWELL PUBLISHING, 9600 GARSINGTON RD , OXFORD OX4 2DQ , OXON , ENGLAND

Subject Category: BIOCHEMISTRY & MOLECULAR BIOLOGY; BIOPHYSICS

IDS Number: 099TW

 

2Synthesis of rapid responsive gels comprising hydrophilic backbone and poly(N-isopropylacrylamide) graft chains by RAFT polymerization and end-linking processes

 

Author(s): Liu QF (Liu, Qunfeng), Zhang P (Zhang, Ping), Qing AX (Qing, Aixiang), Lan YX (Lan, Yanxun), Shi JB (Shi, Jianbo), Lu MG (Lu, Mangeng)

Source: POLYMER 47 (20): 6963-6969 SEP 20 2006

Document Type: Article

Language: English

Cited References: 37     

Times Cited: 0   

Abstract: A thermosensitive poly(N-isopropylacrylamide) (PNIPAM) grafted gel, which comprises hydrophilic backbone and freely mobile PNIPAM graft chains, was synthesized by reversible addition fragmentation chain transfer (RAFT) polymerization and end-linking processes. Functional PNIPAM bearing dithiobenzoate end group (-C(=S)S-R) was prepared first, and then it was reacted with divinyl compounds to obtain gel. In order to adjust the composition of the gels, two divinyl compounds, N,N-methylenebisacrylamide (BIS) and poly(ethylene glycol) diacrylate (PEGDAC), were used. The cross-linking polymerization mechanism was proposed. The swelling and deswelling kinetics of the hydrogels were measured. The gels exhibit rapid deswelling kinetics. At the same time, they show rapid swelling kinetics within 30 min, whereas a conventional PNIPAM-co-PEG-co-BIS gel with the same feed composition requires more than 10 It to reach swelling equilibrium. (c) 2006 Elsevier Ltd. All rights reserved.

Author Keywords: end-linking processes; poly(N-isopropylacrylamide); poly(ethylene glycol)

KeyWords Plus: FREE-RADICAL POLYMERIZATION; POLY N-ISOPROPYLACRYLAMIDE; PNIPAAM HYDROGELS; SHRINKING KINETICS; SWELLING BEHAVIOR; MOLECULAR-WEIGHT; SEMI-IPN; TEMPERATURE; POLYSTYRENE; MECHANISM

Addresses: Lu MG (reprint author), Chinese Acad Sci, Guangzhou Inst Chem, POB 1122, Guangzhou 510650, Peoples R China
Chinese Acad Sci, Guangzhou Inst Chem, Guangzhou 510650, Peoples R China
Guangdong Ocean Univ, Coll Sci, Zhanjiang, Guangdong Peoples R China
Chinese Acad Sci, Grad Sch, Beijing, Peoples R China
Sun Yat Sen Univ, Affiliated Hosp 1, Hosp Otorhinolaryngol, Guangzhou 510630, Peoples R China

E-mail Addresses: mglu@gic.ac.cn

Publisher: ELSEVIER SCI LTD, THE BOULEVARD, LANGFORD LANE , KIDLINGTON, OXFORD OX5 1GB, OXON , ENGLAND

Subject Category: POLYMER SCIENCE

IDS Number: 097BM

ISSN: 0032-3861

 

3The occurrence of Toxocara malaysiensis in cats in China , confirmed by sequence-based analyses of ribosomal DNA

 

Author(s): Li MW (Li, Ming-Wei), Zhu XQ (Zhu, Xing-Quan), Gasser RB (Gasser, Robin B.), Lin RQ (Lin, Rui-Qing), Sani RA (Sani, Rehana A.), Lun ZR (Lun, Zhao-Rong), Jacobs DE (Jacobs, Dennis E.)

Source: PARASITOLOGY RESEARCH 99 (5): 554-557 OCT 2006

Document Type: Article

Language: English

Cited References: 28     

Times Cited: 0     

Abstract: Non-isotopic polymerase chain reaction (PCR)based single-strand conformation polymorphism and sequence analyses of the second intemal transcribed spacer (ITS-2) of nuclear ribosomal DNA (rDNA) were utilized to genetically characterise ascaridoids from dogs and cats from China by comparison with those from other countries. The study showed that Toxocara canis, Toxocara cati, and Toxascaris leonina from China were genetically the same as those from other geographical origins. Specimens from cats from Guangzhou , China , which were morphologically consistent with Toxocara malaysiensis, were the same genetically as those from Malaysia , with the exception of a polymorphism in the ITS-2 but no unequivocal sequence difference. This is the first report of T malaysiensis in cats outside of Malaysia (from where it was originally described), supporting the proposal that this species has a broader geographical distribution. The molecular approach employed provides a powerful tool for elucidating the biology, epidemiology, and zoonotic significance of T malaysiensis.

KeyWords Plus: INTERNAL TRANSCRIBED SPACERS; PARASITIC ZOONOSES; COMPLEX NEMATODA; DOMESTIC CAT; IDENTIFICATION; ASCARIDOIDEA; MEMBERS; ANISAKIDAE; CANIS; DOGS

Addresses: Zhu XQ (reprint author), S China Agr Univ, Coll Vet Med, 483 Wushan St,Tianhe Dist, Guangzhou 510642, Guangdong Peoples R China
S China Agr Univ, Coll Vet Med, Guangzhou 510642, Guangdong Peoples R China
Guangdong Ocean Univ, Coll Agr, Dept Vet Med, Zhanjiang 524088, Guangdong Peoples R China
Univ Melbourne, Dept Vet Sci, Werribee, Vic 3030 Australia
Univ Pertanian Malaysia, Fac Vet Med, Serdang 43400, Selangor DE Malaysia
Zhongshan Univ, Sch Life Sci, Guangzhou 510275, Guangdong Peoples R China
Univ London, Univ London Royal Vet Coll, Dept Pathol & Infect Dis, Hatfield AL9 7TA, Herts England

E-mail Addresses: xingquanzh@scau.edu.cn

Publisher: SPRINGER, 233 SPRING STREET, NEW YORK , NY 10013 USA

Subject Category: PARASITOLOGY

IDS Number: 096NW

ISSN: 0932-0113

 

4A hexanuclear iodoargentate(I) cluster of the coplanar dicubane-like type: Structure and nonlinear optical (NLO) properties of {[(t-Bu)(4)N](2)[Ag6I8]}(n)

 

Author(s): Li Y (Li, Y.), Zhang ZX (Zhang, Z. X.), Li KC (Li, K. C.), Song WD (Song, W. D.), Huang F (Huang, F.), Li SD (Li, S. D.), Li XW (Li, X. W.), Xu JQ (Xu, J. Q.), Pan LY (Pan, L. Y.)

Source: POLISH JOURNAL OF CHEMISTRY 80 (9): 1533-1539 SEP 2006

Document Type: Article

Language: English

Cited References: 13     

Times Cited: 0     

Abstract: A polynuclear silver(I) complex {[(t-Bu)(4)N](2)[Ag6I8]}(n) 1 with iodo-bridging ligands has been prepared, the centrosymmetric cluster anion can be described as two [Ag4I4] distorted cubane units sharing one [Ag2I2] plane. This cluster polymer shows strong third-order nonlinear optical (NLO) absorption and refraction with absorption coefficient alpha(2) = 8.9 x 10(-10) m(.)w(-1) and refractive index n(2) = -6.6 x 10(-17) m(2 .)w(-1).

Author Keywords: iodoargentate(I) cluster; dicubane-like; structure; nonlinear optical properties

KeyWords Plus: CRYSTAL-STRUCTURE; COMPOUND

Addresses: Li Y (reprint author), Guangdong Ocean Univ, Coll Sci, Zhanjiang 524088, Peoples R China
Guangdong Ocean Univ, Coll Sci, Zhanjiang 524088, Peoples R China
Jilin Univ, Coll Chem, Changchun 130023, Peoples R China
Jilin Univ, Dept Phys, Changchun 130023, Peoples R China

E-mail Addresses: liyong@gdou.edu.cn

Publisher: POLISH CHEMICAL SOCIETY, C/O POLISH ACAD SCIENCES, INST PHYSICAL CHEMISTRY, UL KASPRZAKA 44/52, 01-224 WARSAW , POLAND

Subject Category: CHEMISTRY, MULTIDISCIPLINARY

IDS Number: 080RG

ISSN: 0137-5083

 

5Optimal dietary methionine requirement for Juvenile Cobia (Rachycentron canadum)

 

Author(s): Zhou QC (Zhou, Qi-Cun), Wu ZH (Wu, Zao-He), Tan BP (Tan, Bei-Ping), Chi SY (Chi, Shu-Yan), Yang QH (Yang, Qi-Hui)

Source: AQUACULTURE 258 (1-4): 551-557 AUG 31 2006

Document Type: Article

Language: English

Cited References: 41     

Times Cited: 0     

Abstract: An 8-week feeding experiment was conducted to quantify the dietary methionine requirement of juvenile cobia (initial weight of 11.61 +/- 0.16 g , mean +/- SD) reared in indoor flow-through and aerated aquaria. Six amino acid test diets (44% CP and 16% lipid), using fish meal and wheat gluten as intact protein sources supplemented with crystalline amino acids, were formulated to contain graded levels of methionine (0.61%, 0.83%, 1.05%, 1.30%, 1.48% and 1.68% of dry diet, respectively) at a constant dietary cystine level of 0.67%. Each diet was randomly assigned to three aquaria. Growth performance and feed utilization were significantly influenced by the dietary methionine levels (P < 0.05). Maximum weight gain, specific growth rate and protein efficiency ratio occurred at 1.05% dietary methionine (P < 0.05). The hepatosomatic index, viscerosomatic index and condition factor were not significantly affected by dietary methionine levels (P > 0.05). There were no significant differences in protein, lipid, ash and moisture contents in whole body or muscle, also red blood cell count and plasma protein content for fish fed graded methionine levels of diets; however, hemoglobin, hematocrit, leukocyte, plasma glucose and triacylglycerol concentrations showed significant differences among these treatments (P < 0.05). Methionine concentration in plasma significantly increased with an increase of dietary methionine (P < 0.05). Quadratic regression analysis of specific growth rate against dietary methionine levels indicated that the optimal dietary methionine requirement for maximum growth and feed utilization of juvenile cobia is 1.19% of dry diet in the presence of 0.67% cystine (corresponding to 2.64% of dietary protein on a dry weight basis). (c) 2006 Elsevier B.V. All rights reserved.

Author Keywords: juvenile cobia (Rachycentron canadum); methionine requirement; growth; feed utilization

KeyWords Plus: TROUT ONCORHYNCHUS-MYKISS; AMINO-ACID REQUIREMENT; FINGERLING CHANNEL CATFISH; GULF-OF-MEXICO; RAINBOW-TROUT; SOYBEAN-MEAL; FISH-MEAL; CYSTINE; GROWTH; PROTEIN

Addresses:  Zhou QC (reprint author), Guangdong Ocean Univ, Coll Fisheries, Lab Aquat Econ Anim Nutr & Feed, Zhanjiang 524025, Peoples R China
Guangdong Ocean Univ, Coll Fisheries, Lab Aquat Econ Anim Nutr & Feed,
Zhanjiang 524025, Peoples R China
Ocean Univ
China , Coll Fisheries, Qingdao 266003, Peoples R China

E-mail Addresses: zhouqc@gdou.edu.cn

Publisher:  ELSEVIER SCIENCE BV , PO BOX 211 , 1000 AE AMSTERDAM , NETHERLANDS

Subject Category: FISHERIES; MARINE & FRESHWATER BIOLOGY

IDS Number: 080MV

ISSN: 0044-8486

 

6Efficient synthesis of benzimidazolylphenoxyacetic acid O-acetylxylopyranosyl and O-acetylgalactopyranosyl esters and their antiviral activity

 

Author(s): Chen H (Chen, H.), Song W (Song, W.), Huang S (Huang, S.)

Source: KHIMIYA GETEROTSIKLICHESKIKH SOEDINENII (6): 832-837 JUN 2006

Document Type: Article

Language: English

Cited References: 9     

Times Cited: 0     

Abstract: Six benzimidazolylphenoxyacetic acid O-acetylxylopyranosyl and O-acetylgalactopyranosyl esters were synthesized through esterification reactions at room temperature using 4-dimethylaminopyridine as a catalyst and triethylamine as a deacidification reagent. Their structure was confirmed by IR, H-1 NMR spectra, MS, and elemental analysis. The synthesized compounds are all of P-configuration. The results show that DMAP is an effective catalyst; the yields can reach 63.6%. The above esters showed an improved antiviral activity against tobacco mosaic virus.

Author Keywords: O-acetylgalactopyranosyl esters; O-acetylxylopyranosyl esters; benzimidazolyl-phenoxyacetic acid esters; tobacco mosaic virus; DMAP/Et3N

Addresses: Chen H (reprint author), Guangdong Ocean Univ, Dept Appl Chem, Zhanjiang 542088, Peoples R China
Guangdong Ocean Univ, Dept Appl Chem, Zhanjiang 542088, Peoples R China

E-mail Addresses: huangsq2005@sina.com

Publisher: KHIMIYA GETEROTSIKLICHESKIKH SOEDINENIYA, LATVIAN INST ORGANIC SYNTHESIS 21 AIZKRAUKLES STR, RIGA LV 1006, LATVIA

Subject Category: CHEMISTRY, ORGANIC

IDS Number: 073ZG

ISSN: 0132-6244

 

7Effects of aromatizable and nonaromatizable androgens on the sex inversion of red-spotted grouper (Epinephelus akaara)

 

Author(s): Li GL (Li, Guang-Li), Liu XC (Liu, Xiao-Chun), Lin HR (Lin, Hao-Ran)

Source: FISH PHYSIOLOGY AND BIOCHEMISTRY 32 (1): 25-33 MAR 2006

Document Type: Article

Language: English

Cited References: 16     

Times Cited: 0    

Abstract: The effects of aromatizable 17 alpha-methyltestosterone (MT) and non-aromatizable 17 alpha-methyldihydrotestosterone (MDHT) on sex inversion in red-spotted grouper, Epinephelus akaara, were investigated. Fish were implanted with MT, MDHT and MT+AI (aromatase inhibitor, AI) respectively for one month. The results showed that the three treated groups turned into transitional stage with intersex gonads, which contained atretic oocytes and spermatogenic germ cells at all stages of spermatogenesis. The controls did not change sex. The gonads of more than half MT-implanted fish were in early transitional stages of sex inversion, whereas those of more than half MDHT and MT+AI-implanted fish were in late transitional stages of sex inversion. No difference in serum estradiol-17 beta (E-2) levels between the controls and the treated groups were observed, whereas 11-ketotestosterone (11-KT) and testosterone (T) levels increased in all treated groups. Significantly lower gonadosomatic index (GSI) and gonadal aromatase activity were observed in the treated groups, which were in accordance with the lower mRNA expression of P450aromA. However, P450aromB mRNA expression increased in the MT group, while it did not change in the MDHT group. These results suggest that the sex inversion of red-spotted grouper by MT and MDHT implantation might be due to the suppression of P450aromA gene expression, and resulting in both the decrease of the ovarian estrogen -secretion, as well as the increase in the 11-KT levels. Furthermore, the main reason for MT being less effective than MDHT might be due to partial aromatization of MT to estrogen.

Author Keywords: aromatase inhibitor; Epinephelus akaara; methyltestosterone; methyldihydrotestosterone; sex inversion; sex steroids

KeyWords Plus: TILAPIA OREOCHROMIS-NILOTICUS; AROMATASE INHIBITOR; TELEOST FISH; REVERSAL; DIFFERENTIATION; IMMERSION; SALMON; MALES

Addresses: Lin HR (reprint author), Zhongshan Univ, Coll Life Sci, Inst Aquat Econ Anim, Ghangzhou 510275, Peoples R China
Zhongshan Univ, Coll Life Sci, Inst Aquat Econ Anim, Ghangzhou 510275, Peoples R China
Zhongshan Univ, Coll Life Sci, Guangdong Provincial Key Lab Aquat Econ Anim, Ghangzhou 510275, Peoples R China
Guangdong Ocean Univ, Fisheries Coll, Zhanjiang 524025, Peoples R China

E-mail Addresses: ls32@zsu.edu.cn

Publisher: SPRINGER, VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT , NETHERLANDS

Subject Category: BIOCHEMISTRY & MOLECULAR BIOLOGY; FISHERIES; PHYSIOLOGY

IDS Number: 077UX

ISSN: 0920-1742

 

8A simple method for predicting drag characteristics of the Wells turbine

 

Author(s): Huang ZZ (Huang Zhong-zhou), Yu Z (Yu Zhi), Meng YH (Meng Yong-hong)

Source:  CHINA OCEAN ENGINEERING 20 (3): 473-482 2006

Document Type: Article

Language: English

Cited References: 10     

Times Cited: 0     

Abstract: The drag characteristics of the Wells turbine are difficult to be accurately predicted because of the influences of many variables. Detailed analyses about the effects of these variables on the drag characteristics educe that the most sensitive parameters to the drag characteristics are the turbine solidity of the turbine and incidence angle of airflow. In this paper, an experimental research is conducted on the pressure drop across the flat - plate rotor which is used to simulate the Wells turbine. After nondimensionalization and fitting of the experimental data, a common experiential formula is obtained. Compared with the experimental data from literature, the computational results are satisfactory. Thus, this report provides a simple and convenient method for predicting the drag characteristics of the Wells turbine and optimizing the match design between an oscillating water column and a chamber.

Author Keywords: wave energy; Wells turbine; experiential formula; drag characteristics

KeyWords Plus: OSCILLATING FLOW

Addresses: Huang ZZ (reprint author), Guangdong Ocean Univ, Sch Engn, Zhanjiang 524088, Peoples R China
Guangdong Ocean Univ, Sch Engn,
Zhanjiang 524088, Peoples R China
Zhongshan Univ, Sch Engn, Ghangzhou 510275, Peoples R China
Chinese Acad Sci, Guangzhou Inst Energy Convers,
Guangzhou 510070, Peoples R China

E-mail Addresses: huangzz@gdou.edu.cn

Publisher:  CHINA OCEAN PRESS, INTERNATIONAL DEPT, 8 DA HUI SHI, BEIJING 100081, PEOPLES R CHINA

Subject Category: ENGINEERING, CIVIL; ENGINEERING, OCEAN; ENGINEERING, MECHANICAL; WATER RESOURCES

IDS Number: 077UH

ISSN: 0890-5487

 

9A simple and efficient method for synthesis of fluorine-containing saccharide esters and antiviral activity

 

Author(s): Chen H (Chen, Hong), Huang SQ (Huang, Si-Qing), Xie JY (Xie, Jian-Ying)

Source: JOURNAL OF FLUORINE CHEMISTRY 127 (8): 1130-1136 AUG 2006

Document Type: Article

Language: English

Cited References: 34     

Times Cited: 0     

Abstract: Sixteen new fluorine-containing saccharide esters from fluorine-containing benzoic acids and alpha-O-acetylglycosyl bromide were synthesized in the presence of 4-dimethylaminopyridine (DMAP) and triethylamine (Et3N) under mild conditions in good yields and their structures were clearly verified by IR, H-1 NMR, MS and elemental analysis. This method has high stereospecificity, the configuration is unitary, the new synthesized compounds are all of beta-configuration. The results of bioassay showed that these title compounds possess potential antiviral activities against tobacco mosaic virus (TMV). (c) 2006 Elsevier B.V. All rights reserved.

Author Keywords: fluorine-containing benzoic acid; O-acetylglycosyl saccharide esters; TMV; DMAP/Et3N

KeyWords Plus: DERIVATIVES; CHEMISTRY; AGENTS

Addresses: Huang SQ (reprint author), Guangdong Ocean Univ, Dept Appl Chem, Zhanjiang 524088, Peoples R China
Guangdong Ocean Univ, Dept Appl Chem, Zhanjiang 524088, Peoples R China

E-mail Addresses: chenh@gdou.edu.cn, huangsq2005@sina.com

Publisher: ELSEVIER SCIENCE SA, PO BOX 564 , 1001 LAUSANNE , SWITZERLAND

Subject Category: CHEMISTRY, INORGANIC & NUCLEAR; CHEMISTRY, ORGANIC

IDS Number: 075HE

ISSN: 0022-1139

 

10Feeding and control of blue-green algal blooms by tilapia (Oreochromis niloticus)

 

Author(s): Lu KH (Lu, Kaihong), Jin CH (Jin, Chunhua), Dong SL (Dong, Shuanglin), Gu BH (Gu, Binhe), Bowen SH (Bowen, Stephen H.)

Source: HYDROBIOLOGIA 568: 111-120 SEP 2006

Document Type: Article

Language: English

Cited References: 30     

Times Cited: 0   

Abstract: Outbreak of blue-green algal blooms, with associated unsightly scum and unpleasant odor, occurs frequently in eutrophic lakes. We conducted feeding experiments to study ingestion and digestion of Microcystis aeruginosa by tilapia (Oreochromis niloticus) under laboratory conditions and field testing to reduce Microcystis blooms by stocking tilapia in Lake Yuehu and other eutrophic waters in Ningbo , China between 2000 and 2003. Our results show that tilapia was capable of ingesting and digesting a large quantity of Microcystis. Digestion efficiency ranged from 58.6 to 78.1% at water temperature of 25 degrees C. Ingestion rate increased with increasing fish weight and water temperature. Intensive blooms occurred in Lake Yuehu in both 1999 and 2000. The lake was stocked with silver carp (Hypophthalmichthys molitrix), bighead (Aristichthys nobilis) and a freshwater mussel (Hyriopsis cumingii) at a total biomass of 9.8 g m(-3) in early 2001, and tilapia at 3 -5 g m(-3) in April of 2002. From June to October, average phytoplankton density decreased from 897.6x10(6) cells l(-1) in 2000 to 291.7x10(6) cells l(-1) in 2001 and 183.0x10(6) cells l(-1) in 2002. Compared to 2000, the annual average phytoplankton biomass in 2001 and 2002 decreased by 48.6% and 63.8%, respectively. The blue-green algal biomass which made up 70% of the total phytoplankton biomass in 2000 was reduced to 22.1% in 2001 and 11.2% in 2002. Meanwhile, Secchi depth increased from 20 -50 cm to 55 -137 cm during the same time period. Similar results were observed in some other eutrophic waters. For example, algal bloom disappeared about 20 days after tilapia fingerlings were stocked (8 -15 g m(-3)) to a pond in Zhenhai Park . Chlorophyll a concentration and phytoplankton production declined dramatically whereas water transparency increased substantially. However, the impacts of tilapia on nitrogen and phosphorus dynamics in natural lakes need further investigation. Our studies revealed that stocking tilapia is an effective way to control algal blooms in eutrophic waters, especially in lakes where nutrient loading cannot be reduced sufficiently, and where grazing by zooplankton cannot control phytoplankton production effectively.

Author Keywords: tilapia; eutrophication; blue-green algal blooms; biomanipulation; ingestion; digestion; nutrients

KeyWords Plus: NILE TILAPIA; AQUACULTURE PONDS; TEMPERATE LAKES; SILVER CARP; BIOMANIPULATION; FISH; CONCLUSIONS; ECOSYSTEMS; BIOMASS; SHALLOW

Addresses: Lu KH (reprint author), Ocean Univ China, Coll Fisheries, Dept Life Sci & Technol, Qingdao 266003, Peoples R China
Ocean Univ China, Coll Fisheries, Dept Life Sci & Technol, Qingdao 266003, Peoples R China
Ningbo Univ, Coll Life Sci & Biotechnol, Dept Ocean & Fisheries, Ningbo 315211, Peoples R China
Guangdong Ocean Univ, Fishery Coll, Guangdong 524088, Peoples R China
Emory Univ, Oxford Coll, Oxford, GA 30054 USA

E-mail Addresses: nblkh@nbip.net

Publisher: SPRINGER, VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT , NETHERLANDS

Subject Category: MARINE & FRESHWATER BIOLOGY

IDS Number: 068SD

ISSN: 0018-8158

 

11Synthesis, crystal structure and third-order nonlinear optical properties of heterometallic cluster [WM2S4(Pph(3))(3)]center dot DMF (M-2=1.25Ag+0.75Cu)

 

Author(s): Zhang ZX (Zhang, Zhao-Xia), Li Y (Li, Yong), Li KC (Li, Ke-Chang), Song WD (Song, Wen-Dong), Li QS (Li, Qiu-Shun), Xiong HP (Xiong, Hao-Ping), Xu JQ (Xu, Ji-Qing), Pan LY (Pan, Ling-Yun)

Source: JOURNAL OF MOLECULAR STRUCTURE 791 (1-3): 117-121 JUN 19 2006

Document Type: Article

Language: English

Cited References: 31     

Times Cited: 0    

Abstract: The heterometallic cluster [WM2S4(Pph(3))(3)] (.) DMF (M-2 = 1.25Ag + 0.75Cu) 1 has been synthesized by low-temperature solid-state reaction. Single crystal X-ray analyses reveal that compound I possesses a linear skeleton with a W center slightly distorted from the tetrahedron. The compound was characterized by elemental analyses, IR spectra and UV-visible spectra. The third-order nonlinear optical (NLO) properties were also investigated and they exhibit nice nonlinear absorption and self-defocusing performance with modulus of the hyperpolarizability 9.8 X 10-30 esu for 1. (c) 2006 Elsevier B.V. All rights reserved.

Author Keywords: W-Cu(Ag)-S cluster; third-order nonlinear optical property; solid-state reaction

KeyWords Plus: NITROGENASE; MOLYBDENUM; REFRACTION; CENTERS; COMPLEX; SITE

Addresses: Song WD (reprint author), Guangdong Ocean Univ, Coll Sci, Zhanjiang 524088, Peoples R China
Guangdong Ocean Univ, Coll Sci, Zhanjiang 524088, Peoples R China
Jilin Univ, Coll Chem, Changchun 130023, Peoples R China
Jilin Univ, Coll Phys, Changchun 130023, Peoples R China

E-mail Addresses: liyong@gdou.edu.cn

Publisher:  ELSEVIER SCIENCE BV , PO BOX 211 , 1000 AE AMSTERDAM , NETHERLANDS

Subject Category: CHEMISTRY, PHYSICAL

IDS Number: 066YY

ISSN: 0022-2860

 

12Adsorption of aluminium by a latosol as affected by phosphate and glutamic acid

 

Author(s): Yang JW (Yang, Jie Wen), Guo RF (Guo, Rong Fa), Chen SQ (Chen, Sheng Qi)

Source: ENVIRONMENTAL GEOLOGY 50 (6): 867-871 AUG 2006

Document Type: Article

Language: English

Cited References: 28     

Times Cited: 0     

Abstract: The effect of phosphate and glutamic acid on adsorption of aluminium onto a latosol was investigated as a function of pH and ligand concentrations through batch equilibrium experiments. The results showed that adsorption of aluminium by the soil was enhanced after addition of phosphate at low pH, and this promotive effect was gradually eliminated with the increase in pH. The positive effect of phosphate on aluminium adsorption onto latosol was attributed to phosphate-induced surface negative charge and formation of ternary surface complexes involving aluminium and phosphate. While using silica as adsorbent, the inactive surfaces for phosphate, promotion of adsorption of aluminium by phosphate was also found. Then it was proposed that additional aluminium might bind to the phosphate adsorbed onto the silica in the form of surface complexes silica-aluminium-phosphate again, and the mechanism might operate in the soil systems as well. Glutamic acid exhibited no influence on the adsorption of aluminium by the soil at low pH. After increasing the pH, adsorption of aluminium was inhibited especially with the highest addition of glutamic acid, probably owing to weak affinity of complexes between glutamic acid and aluminium to the soil.

Author Keywords: aluminium; adsorption; phosphate; glutamic acid

KeyWords Plus: ORGANIC-LIGANDS; CLAY-MINERALS; AMINO-ACIDS; IRON-OXIDE; SORPTION; SURFACE; CADMIUM; DESORPTION; MECHANISMS; INTERFACE

Addresses: Yang JW (reprint author), Guangdong Ocean Univ, Coll Agr, Dept Resources & Environm Sci, Zhanjiang 524088, Peoples R China
Guangdong Ocean Univ, Coll Agr, Dept Resources & Environm Sci,
Zhanjiang 524088, Peoples R China

E-mail Addresses: jw_yang@126.com

Publisher: SPRINGER, 233 SPRING STREET, NEW YORK , NY 10013 USA

Subject Category: ENVIRONMENTAL SCIENCES; GEOSCIENCES, MULTIDISCIPLINARY; WATER RESOURCES

IDS Number: 067JA

ISSN: 0943-0105

 

13CaCO3/natural rubber latex nanometer composite and its properties

 

Author(s): Deng CM (Deng, Chun-Mei), Chen M (Chen, Mei), Ao NJ (Ao, Ning-Jian), Yan D (Yan, Dan), Zheng ZQ (Zheng, Zhong-Qian)

Source: JOURNAL OF APPLIED POLYMER SCIENCE 101 (5): 3442-3447 SEP 5 2006

Document Type: Article

Language: English

Cited References: 14     

Times Cited: 0     

Abstract: Calcium carbonate/natural rubber (NR) latex nanometer composites were prepared by adding nanometer CaCO3 whose surface had been treated to natural rubber latex (NRL) before sulfuration. The physical, thermooxidative aging, and thermal degradation properties and the ultra-microstructure were analyzed with a multipurpose material testing meter, a thermal analysis meter and a Philips XL-30 SEM, respectively. The results showed that the structures and properties of nanometer composites could be clearly improved by NRL mixed with surface-treated nano-meter CaCO3. The physical properties of the nanometer composites were best when the content of surface treatment agent was 2.5% (to nanometer CaCO3), the nanometer CaCO3/NRL content was 3:100, and the stirring time for treating the surface of the nanometer CaCO3 was 20 min. Simultaneously, the thermooxidative aging resistance of the nanometer composites also was significantly improved. (c) 2006 Wiley Periodicals, Inc.

Author Keywords: nanometer CaCO3; rubber; composites

Addresses: Ao NJ (reprint author), Guangdong Ocean Univ, Coll Sci, Zhanjiang 524088, Guangdong Peoples R China
Guangdong Ocean Univ, Coll Sci, Zhanjiang 524088, Guangdong Peoples R China
CATAS, Key Lab Nat Rubber Proc, Minist Agr, Agr Prod Proc Res Inst, Zhanjiang 524001, Guangdong Peoples R China
Jinan Univ, Inst Biomed Engn, Guangzhou 510632, Guangdong Peoples R China

E-mail Addresses: aoningjianao@163.com

Publisher: JOHN WILEY & SONS INC, 111 RIVER ST , HOBOKEN , NJ 07030 USA

Subject Category: POLYMER SCIENCE

IDS Number: 064ZC

ISSN: 0021-8995

 

14Gonadal development, aromatase activity and P450 aromatase gene expression during sex inversion of protogynous red-spotted grouper Epinephelus akaara (Temminck and Schlegel) after implantation of the aromatase inhibitor, fadrozole

 

Author(s): Li GL, Liu XC, Zhang Y, Lin HR

Source: AQUACULTURE RESEARCH 37 (5): 484-491 MAR 22 2006

Document Type: Article

Language: English

Cited References: 30     

Times Cited: 0    

Abstract: In the present study, we implanted 2-year-old female red-spotted grouper, Epinephelus akaara, with a non-steroidal aromatase inhibitor (AI), fadrozole, in the breeding season and examined changes in gonadal histology, serum sex steroids, aromatase activities and P450 aromatase (P450arom) gene expression in gonads after AI implantation. Aromatase inhibitor at doses from 0.1 to 10.0 mg kg(-1) BW induced a sex inversion and completion of spermatogenesis up to the functional male phase, but doses of 1.0 and 10.0 mg kg(-1) BW AI produced more males than 0.1 mg kg(-1) BW AI. Serum estradiol-17 beta (E-2) levels decreased, but 11-ketotestosterone (11-KT) levels increased significantly in all the AI-implanted groups, whereas testosterone (T) levels increased significantly only in the 1.0 mg kg(-1) BW AI-implanted group. Aromatase activities and P450arom gene expression in gonads were inhibited significantly in the AI-implanted groups, which was in accordance with the decrease in serum E-2 levels. These results suggested the optimal dose of AI to induce sex inversion to be 1.0 mg kg(-1) BW. Furthermore, the sex inversion induced by AI may be attributed to the inhibition of P450arom gene expression and aromatase activity and the resultant decrease in the biosynthesis of endogenous E-2. Meanwhile, the elevated 11-KT levels were also associated closely with the occurrence of sex inversion in protogynous red-spotted grouper.

Author Keywords: Epinephelus akaara; aromatase inhibitor; fadrozole; aromatase activity; sex inversion

KeyWords Plus: PROTANDROUS BLACK PORGY; TILAPIA OREOCHROMIS-NILOTICUS; ACANTHOPAGRUS-SCHLEGELI; STEROID-HORMONES; DIFFERENTIATION; REVERSAL; SALMON; MALES; FISH; TESTOSTERONE

Addresses: Lin HR (reprint author), Zhongshan Univ, Coll Life Sci, Inst Aquat Econ Anim, State Key Lab Biocontrol, Ghangzhou 510275, Peoples R China
Zhongshan Univ, Coll Life Sci, Inst Aquat Econ Anim, State Key Lab Biocontrol, Ghangzhou 510275, Peoples R China
Guangdong Ocean Univ, Coll Fisheries, Zhanjiang, Peoples R China

E-mail Addresses: ls32@zs.edu.cn

Publisher: BLACKWELL PUBLISHING, 9600 GARSINGTON RD , OXFORD OX4 2DQ , OXON , ENGLAND

Subject Category: FISHERIES

IDS Number: 020EK

ISSN: 1355-557X

 

15Studies on genetic variation of different Chinese duck populations with random amplified polymorphic DNA analysis

 

Author(s): Su Y, Liu CW, Liu L, Ye CH, Cao WQ, Huang YQ, Zheng J, Cai DY, Olowofeso O

Source: ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 19 (4): 475-481 APR 2006

Document Type: Article

Language: English

Cited References: 32     

Times Cited: 0    

Abstract: The genetic polymorphism and relationships of Muscovy, Cherry Valley, Meat ducks, Partridge ducks and their crossbreds F-1 and F-2, respectively, were studied using a random amplified polymorphic DNA (RAPD) technique. The results showed that RAPD markers were effective for the analysis of genetic relationships among ducks. Amplification with 20-primers gave 760 reproducible amplified fragments. The percentage of polymorphic marker band was 74.70%, which indicates that the RAPD technique had higher efficiency of polymorphism detection and sensitivity in studying the genetic variations among ducks and showed that the genetic polymorphism was abundant between two species of duck populations. The average index of genetic distance in hybrid F, was 0.2341 and higher than that of its parents, which indicates that the genetic diversity was improved by crossbreeding with Muscovy .

Author Keywords:  Muscovy ; crossbred; RAPD; genetic diversity; genetic relationships

KeyWords Plus: RAPD-PCR; ARBITRARY PRIMERS; MARKERS; CATTLE; IDENTIFICATION; BREEDS; GOATS

Addresses: Su Y (reprint author), Guangdong Ocean Univ, Zhanjiang 524088, Peoples R China
Guangdong Ocean Univ,
Zhanjiang 524088, Peoples R China

E-mail Addresses: ssyy925@tom.com

Publisher: ASIAN-AUSTRALASIAN ASSOC ANIMAL PRODUCTION SOCIETIES, COLLEGE AGRICULTURE LIFE SCIENCES, DEPT ANIMAL SCIENCE TECHNOLOGY, SUWON 441-744, SOUTH KOREA

Subject Category: AGRICULTURE, DAIRY & ANIMAL SCIENCE

IDS Number:  007IN

ISSN: 1011-2367

 

16Diet and digestion in Chinese mud carp Cirrhinus molitorella compared with other ilyophagous fishes

 

Author(s): Bowen SH (Bowen, S. H.), Gu B (Gu, B.), Huang ZH (Huang, Zhanghan)

Source: TRANSACTIONS OF THE AMERICAN FISHERIES SOCIETY 135 (5): 1383-1388 SEP 2006

Document Type: Article

Language: English

Cited References: 21     

Times Cited: 0     

Abstract: Ilyophagous fishes, that is, those that feed on soft sediments, are widely distributed throughout temperate and tropical freshwater and estuarine environments. Despite their abundance (they constituted over half of the ichthyomass in some systems), the role of these fishes in ecosystem structure and function has received little attention. In particular, data on diet and digestion in Cirrhinus, a genus abundant through much of Southeast Asia , are yet to be reported. In this study we examined gut contents of Chinese mud carp Cirrhinus molitorella; fish ranged from 16 to 29 cm total length and were collected from five ponds each in Wuchuan and Shunde Counties, Guangdong Province, China. Their diets were made up of sand, mud, and amorphous organic matter. Foregut samples averaged 0.226-mg ash-free dry weight (AFDW)/mg dry weight and 0.155 mg total amino acids (AA)/mg AFDW. Assimilation efficiency averaged 0.113 for AFDW and 0.153 for total AA. Compared with that in other ilyophagous fishes, digestion in Chinese mud carp is inefficient. Nonetheless, the ratio of AA (mg) assimilated to total organic matter (mg) assimilated-0.209-is in the range expected to support moderate growth, as has been reported for this species. Review of the literature on ilyophagous fishes reveals four groups characterized by different gut morphologies that each appear to be adapted to the use of relatively indigestible diets. The extremely long, undifferentiated alimentary canal in Chinese mud carp and related species is the simplest of these, and its relative inefficiency may be related to this simple morphology.

KeyWords Plus: ORGANIC-MATTER; MUGIL-CEPHALUS; FOOD; SELECTION; DETRITUS; QUALITY; PROTEIN; HABITS

Addresses: Bowen SH (reprint author), Emory Univ, Oxford Coll, 100 Hamill St, Oxford, GA 30054 USA
Michigan Technol Univ, Dept Biol Sci, Houghton, MI 49931 USA
Zhanjiang Ocean Univ, Coll Fishery Sci, Zhanjiang 524088, Guangdong Peoples R China
Chinese Acad Fisheries Sci, Pearl River Fishery Res Inst, Guangzhou 510380, Peoples R China

E-mail Addresses: shbowen@emory.edu

Publisher: AMER FISHERIES SOC, 5410 GROSVENOR LANE SUITE 110 , BETHESDA , MD 20814-2199 USA

Subject Category: FISHERIES

IDS Number: 101DF

ISSN: 0002-8487

 

17Potent protection of ferulic acid against excitotoxic effects of maternal intragastric administration of monosodium glutamate at a late stage of pregnancy on developing mouse fetal brain

 

Author(s): Yu LJ, Zhang YP, Ma RD, Bao L, Fang JZ, Yu TX

Source: EUROPEAN NEUROPSYCHOPHARMACOLOGY 16 (3): 170-177 APR 2006

Document Type: Article

Language: English

Cited References: 28     

Times Cited: 0     

Abstract: The present study was conducted to investigate a possible protection of ferulic acid against excitotoxic effects of maternal intragastric (ig) administration of monosodium glutamate (MSG) at a late stage of pregnancy on developing mouse fetal brain. [H-3]-labeled glutamate was used as radiotracer to study the effect of ferulic acid on distribution of MSG in mouse fetal brain. MSG dissolved in distilled water ( 2.0 g /kg body weight, 640 kBq of [H-3]glutamate/mouse, ig) or/and sodium ferulate (SF) (20, 40, 80 mg/kg body weight, ip), was given to pregnant mice at 17-19 days; the distribution of [H-3]glutamate in the mouse fetal brains was measured at 30, 60, 90, 120 min after administration of MSG or/and SF Maternal mice were given MSG (1.0, 2.0, 4.0 g /kg body weight, ig) or/and SF (20, 40, 80 mg/kg body weight, ip) simultaneously at 17-19 days of pregnancy, and then behavioral tests and histopathological observations were used to analyze glutamate-induced functional and morphological changes of the brains of their offspring, and Western blot analysis was performed for examining expressions of bcl-2 and caspase-3. The results showed that SF obviously inhibited the uptake of labeled glutamate in fetal brain. In addition, SF countered the effects of MSG on behavior, histopathology, genetic toxicity, and expression of apoptosis-related gene. The results suggest that ferulic acid is a novel competitive N-methyl-D-aspartate (NMDA) receptor antagonist and neuroprotector. In conclusion, maternal administration of ferulic acid has potent protective effects against glutamate-induced neurotoxicity in their filial mice. (c) 2005 Elsevier B.V. and ECNP. All rights reserved.

Author Keywords: Kunming mouse; excitotoxicity; behavioral disturbance; histopathological lesion; genetic toxicity; apoptosis-related gene; ferulic acid; NMDA receptor antagonist; protective effects against neurotoxicity

KeyWords Plus: CENTRAL-NERVOUS-SYSTEM; AMINO-ACIDS; NEUROTOXICITY; MK-801; BCL-2

Addresses: Yu LJ (reprint author), Zhanjiang Ocean Univ, Guangdong Provincial Key Lab Marine Mat Med, Jiefang E Ave 40, Zhanjiang 524025, Peoples R China
Zhanjiang Ocean Univ, Guangdong Provincial Key Lab Marine Mat Med, Zhanjiang 524025, Peoples R China

E-mail Addresses: ywyj9578@sohu.com

Publisher:  ELSEVIER SCIENCE BV , PO BOX 211 , 1000 AE AMSTERDAM , NETHERLANDS

Subject Category: CLINICAL NEUROLOGY; NEUROSCIENCES; PHARMACOLOGY & PHARMACY; PSYCHIATRY

IDS Number: 031HQ

ISSN: 0924-977X

 

18Intestinal distribution and fecundity of two species of Diplostomum parasites in definitive hosts

 

Author(s): Karvonen A, Cheng GH, Seppala O, Valtonen ET

Source: PARASITOLOGY 132: 357-362 Part 3, MAR 2006

Document Type: Article

Language: English

Cited References: 33     

Times Cited: 1    

Abstract: This paper investigated the intestinal distribution and fecundity of 2 species of Diplostoymum parasites, D. spothaceum and D. pseadospathaceum, in 2 species of definitive hosts, herring gull (Larus argentatus) and common gull (L. callus), using both empirical field data and experimental infections. At the level of individual hosts, the parasite species Occupied different parts within the intestine, but the fecundity of the worms, measured as the number of eggs in the uterus, did not differ between the parasite species except in wild common gulls. Interestingly, egg numbers in individual hosts were positively correlated between the parasite species suggesting that some birds provided better resource for the parasite species. At the host population level, fecundity of the worms did not differ between the host species or between adult birds and chicks. Both parasite species were also aggregated to the same host individuals and it is likely that aggregation is transferred to gulls from fish intermediate hosts. Individual differences in suitability and parasite numbers between hosts provide important grounds and implications for epidemiological model-based parasite prevention strategies.

Author Keywords: complex life-cycles; parasite community; intestinal distribution; competition; parasite aggregation; reproductive success; epidemiology; fish fanning; Larus argentatus; Larus canus

KeyWords Plus: TROPHIC TRANSMISSION; INTERMEDIATE HOSTS; HELMINTH-PARASITES; CATARACT FORMATION; LIFE-HISTORIES; RAINBOW-TROUT; EYE FLUKES; SPATHACEUM; PATTERNS; AGGREGATION

Addresses: Karvonen A (reprint author), Univ Jyvaskyla, Dept Biol & Environm Sci, POB 35, FI-40014 Jyvaskyla, Finland
Univ Jyvaskyla, Dept Biol & Environm Sci, FI-40014 Jyvaskyla, Finland
Zhanjiang Ocean Univ, Coll Fisheries,
Guangdong 524025, Peoples R China

E-mail Addresses: anskarv@bytl.jyu.fi

Publisher:  CAMBRIDGE UNIV PRESS, 40 WEST 20TH ST , NEW YORK , NY 10011-4211 USA

Subject Category: PARASITOLOGY

IDS Number: 028FW

ISSN: 0031-1820

 

19Thermal degradation kinetics and morphology of natural rubber/silica nanocomposites

 

Author(s): Li SD, Peng Z, Kong LX, Zhong JP

Source: JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 6 (2): 541-546 FEB 2006

Document Type: Article

Language: English

Cited References: 22     

Times Cited: 1    

Abstract: A novel natural rubber/silica (NR/SiO2) nanocomposite with a SiO2 loading of 4 wt% is developed by incorporating latex compounding with self-assembly techniques. The SiO2 nanoparticles are homogenously distributed throughout the NR matrix as spherical nano-clusters with an average size of 75 nm. In comparison with the host NR, the thermal resistance of the nanocomposite is significantly improved. The degradation temperatures (T), reaction activation energy (E), and reaction order (n) of the nanocomposite are markedly higher than those of the pure NR, due to significant retardant effect of the SiO2 nanoparticles.

Author Keywords: nanocomposite; natural rubber; silica; self-assembly; thermal degradation kinetics; morphology

KeyWords Plus: CRYSTALLIZATION KINETICS; RUBBER; DECOMPOSITION; RESISTANCE; LATEX

Addresses: Peng Z (reprint author), S China Trop Agr Prod Proc Res Inst, Agr Minist Key Lab Nat Rubber Proc, POB 318, Zhanjiang 524001, Peoples R China
S China Trop Agr Prod Proc Res Inst, Agr Minist Key Lab Nat Rubber Proc, Zhanjiang 524001, Peoples R China
Zhanjiang Ocean Univ, Coll Sci, Zhanjiang 524088, Peoples R China
Univ S Australia, Ctr Adv Mfg Res, Mawson Lakes, SA 5095 Australia

Publisher: AMER SCIENTIFIC PUBLISHERS, 25650 NORTH LEWIS WAY , STEVENSON RANCH , CA 91381-1439 USA

Subject Category: CHEMISTRY, MULTIDISCIPLINARY; NANOSCIENCE & NANOTECHNOLOGY; MATERIALS SCIENCE, MULTIDISCIPLINARY

IDS Number: 014ZX

ISSN: 1533-4880

 

20Nanotechnology and its role in the management of periodontal diseases

 

Author(s): Kong LX, Peng Z, Li SD, Bartold PM

Source: PERIODONTOLOGY 2000 40: 184-196 FEB 2006

Document Type: Article

Language: English

Cited References: 84     

Times Cited: 2     

KeyWords Plus: GUIDED TISSUE REGENERATION; NANOTUBE MEMBRANES; FURCATION DEFECTS; SMART NANOTUBES; HOLLOW SPHERES; NANOCOMPOSITE; FABRICATION; BONE; HYDROXYAPATITE; NANOPARTICLES

Addresses: Kong LX (reprint author), Univ S Australia, Ctr Adv Mfg Res, Div Informat Technol, Adelaide, SA 5001 Australia
Univ S Australia, Ctr Adv Mfg Res, Div Informat Technol, Adelaide, SA 5001 Australia
Zhanjiang Ocean Univ, Sch Sci, Zhanjiang, Peoples R China
Univ Adelaide, Sch Dent, Colgate Australian Clin Dent Resource Ctr, Adelaide, SA Australia

Publisher: BLACKWELL PUBLISHING, 9600 GARSINGTON RD , OXFORD OX4 2DQ , OXON , ENGLAND

Subject Category: DENTISTRY, ORAL SURGERY & MEDICINE

IDS Number: 999TU

ISSN: 0906-6713

 

21Effects of stearates on the thermal stability of chlorinated natural rubber from latex

 

Author(s): Yu HP, Li SD, Zhong JP, Xu K

Source: JOURNAL OF APPLIED POLYMER SCIENCE 99 (4): 1981-1985 FEB 15 2006

Document Type: Article

Language: English

Cited References: 21     

Times Cited: 0    

Abstract: The effects of stearates on the dehydrochlorination (DHC) reaction of chlorinated natural rubber (CNR) from latex were studied by the measurement of the HCl evolving rate during the early stage of the thermal degradation of CNR and by the determination of the amounts of cyclic conjugated dienes formed on the CNR molecular chains. During the early stage of the thermal degradation of CNR at 150 degrees C, HCl was eliminated from the CNR molecular chains, and the cyclic conjugated dienes were formed on the CNR molecular chains. Under the effects of barium stearate, lead stearate, cadmium stearate, and calcium stearate, the HCl evolving rates of CNR were reduced whereas the amounts of cyclic conjugated dienes that formed on the CNR molecular chains were increased. When zinc stearate was added, because of the formation of ZnCl2 which was an active catalyst of the DHC reaction of CNR, both the HCl evolving rate from CNR and the formation of cyclic conjugated dienes were increased. The results indicate that the addition of stearates can reduce the thermal stability of CNR. (c) 2005 Wiley Periodicals, Inc.

Author Keywords: halogenated; rubber; stabilization; UV-vis spectroscopy

KeyWords Plus: VINYL-CHLORIDE; STRUCTURAL DEFECTS; POLYVINYL-CHLORIDE); DEGRADATION; PVC; COPOLYMERS

Addresses: Yu HP (reprint author), S China Trop Agr Prod Proc Res Inst, Agr Minist Key Lab Nat Rubber Proc, POB 318, Zhanjiang 524001, Peoples R China
S China Trop Agr Prod Proc Res Inst, Agr Minist Key Lab Nat Rubber Proc, Zhanjiang 524001, Peoples R China
Zhanjiang Ocean Univ, Coll Sci, Zhanjiang 524001, Peoples R China

E-mail Addresses: yuheping2000@yahoo.com.cn

Publisher: JOHN WILEY & SONS INC, 111 RIVER ST , HOBOKEN , NJ 07030 USA

Subject Category: POLYMER SCIENCE

IDS Number: 000DN

ISSN: 0021-8995

 

22Effects of dibutyltin dilaurate and epoxidized soya bean oil on the thermal stability of chlorinated natural rubber from latex

 

Author(s): Yu HP, Li SD, Zhong JP, Xu K

Source: JOURNAL OF APPLIED POLYMER SCIENCE 99 (4): 1986-1991 FEB 15 2006

Document Type: Article

Language: English

Cited References: 13     

Times Cited: 0     

Abstract: The effects of dibutyltin dilaurate (DBTL) and epoxidized soya bean oil (EBO) on the dehydrochlorination reaction of chlorinated natural rubber (CNR) from latex were studied by the measurement of the HCl evolving rate during the thermal degradation of CNR and by the determination of the amounts of cyclic conjugated dienes that formed on the CNR molecular chains. During the early stage of the thermal degradation of CNR at 150 degrees C, HCl was eliminated, and the cyclic conjugated dienes formed on the CNR molecular chains. Under the effects of DBTL and EBO, the HCl evolving rates during the early stage of the thermal degradation of CNR were reduced, whereas the amounts of cyclic conjugated dienes formed on the CNR molecular chains were increased. Under the effects of mixtures from the compounding of DBTL with barium stearate or 2,2'methylene-bis(4-methyl-6-tert-butyl-phenol) as well as the compounding of EBO with 2,2'-methylene-bis(4-methyl-6-tert-butyl-phenol), not only the HCl evolving rate from CNR but also the formation of cyclic conjugated dienes decreased, and this indicated that the compounded mixtures had synergistic functions against the thermal degradation of CNR. However, the mixture from the compounding of EBO with barium stearate had no synergistic effect on increasing the thermal stability of CNR. (c) 2005 Wiley Periodicals, Inc.

Author Keywords: halogenated; rubber; stabilization; UV-vis spectroscopy

KeyWords Plus: DEGRADATION; POLYVINYL-CHLORIDE)

Addresses: Yu HP (reprint author), S China Trop Agr Prod Proc Res Inst, Agr Minist Key Lab Nat Rubber Proc, POB 318, Zhanjiang 524001, Peoples R China
S China Trop Agr Prod Proc Res Inst, Agr Minist Key Lab Nat Rubber Proc, Zhanjiang 524001, Peoples R China
Zhanjiang Ocean Univ, Coll Sci, Zhanjiang 524001, Peoples R China

E-mail Addresses: yuheping2000@yahoo.com.cn

Publisher: JOHN WILEY & SONS INC, 111 RIVER ST , HOBOKEN , NJ 07030 USA

Subject Category: POLYMER SCIENCE

IDS Number: 000DN

ISSN: 0021-8995

 

23Role of mitochondria and mitochondrial cytochrome c in tubeimoside I-mediated apoptosis of human cervical carcinoma HeLa cell line

 

Author(s): Wang F, Ma RD, Yu LJ

Source: CANCER CHEMOTHERAPY AND PHARMACOLOGY 57 (3): 389-399 MAR 2006

Document Type: Article

Language: English

Cited References: 46     

Times Cited: 0     

Abstract: Background: Tubeimoside I (TBMS1), a triterpenoid saponin, isolated from the tubers of Bolbostemma paniculatum, showed potent antitumor and antitumor-promoting effects. The objective of this study is to investigate the role of mitochondria and mitochondria cytochrome c in TBMS1-mediated apoptosis of human cervical carcinoma HeLa cell line. Methods: Viability of HeLa cells was measured by MTT assay. Apoptotic induction by TBMS1 was determined by fluorescence microscopy, flow cytometry and gel electrophoresis of fragmented DNA. Mitochondrial transmembrane potential (triangle psi m) was assayed by flow cytometry. Cytochrome c (Cyt c) was detected by Western blotting. Results: The results showed that Cyclosporin A (CsA) partly protected HeLa cells from growth inhibitory effect of TBMS1, and partly countered the ability of TBMS1 to rapidly induce apoptosis in HeLa cells, and that TBMS1 decreased triangle psi m and induced Cyt c release by a mechanism inhibited by CsA, and that TBMS1 induced apoptosis of HeLa cells dose-dependently in accordance with increase of cytosolic Cyt c. Conclusions: TBMS1 opens the permeability transition (PT) pore, thereby decreasing triangle psi m, releasing Cyt c from mitochondria, and further causing a series of events consistent with established mechanistic models of apoptosis.

Author Keywords: tubeimoside I; mitochondria; cytochrome c; apoptosis; HeLa cells

KeyWords Plus: PERMEABILITY TRANSITION-PORE; FLOW-CYTOMETRY; BOLBOSTEMMA-PANICULATUM; CASPASE ACTIVATION; CYCLOPHILIN-D; DEATH; RELEASE; BAX; DIFFERENTIATION; TRANSLOCATOR

Addresses: Ma RD (reprint author), Zhanjiang Ocean Univ, Guangdong Provincial Key Lab Marine Mat Med, Zhanjiang 524025, Guangdong Peoples R China
Zhanjiang Ocean Univ, Guangdong Provincial Key Lab Marine Mat Med, Zhanjiang 524025, Guangdong Peoples R China
Chinese Acad Sci, S China Sea Inst Oceanol, Guangzhou 510301, Peoples R China
Chinese Acad Sci, Grad Sch, Guangzhou, Peoples R China

E-mail Addresses: ywyj9578@sohu.com

Publisher: SPRINGER, 233 SPRING STREET, NEW YORK , NY 10013 USA

Subject Category: ONCOLOGY; PHARMACOLOGY & PHARMACY

IDS Number: 996US

ISSN: 0344-5704

 

24Effects of spark discharge on the anodic coatings on magnesium alloy

 

Author(s): Wang YH, Wang J, Zhang JB, Zhang Z

Source: MATERIALS LETTERS 60 (4): 474-478 FEB 2006

Document Type: Article

Language: English

Cited References: 19     

Times Cited: 0   

Abstract: Spark discharge was the representative phenomenon of Micro-arc oxidation (MAO) method distinguished from other electrochemical oxidation methods. Under the spark discharge treatment, characteristics of the anodic layer were significantly changed. To investigate the influences of the spark discharge, a piece of magnesium alloy AZ91D specimen was partly treated by MAO method in alkaline silicate solution. And the microstructure, element distributions as well as the surface potential distributions of the specimen were studied by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and scanning Kelvin probe (SKP) technique. As a result of intensive spark discharge treatment, porous external layer with dense internal layer were formed on Mg alloy surface. At the same time, the depositions of OH- and SiO32- ions were accelerated, which resulted in the enrichment of element oxygen and silicon at the spark discharge region. Moreover, due to the compact internal layer, the intensive spark discharge region exhibited more positive potentials with respect to other regions, which meant this region could restrain the ejection of electron and provide effective protection to the substrate. In addition, it was found that oxygen played a vital role in determining the intensity and size of sparks, and abundant oxygen resulted in intensive and larger sparks. (c) 2005 Elsevier B.V. All rights reserved.

Author Keywords: spark discharge; micro-arc oxidation; magnesium alloy; oxygen; element distribution; surface potential

KeyWords Plus: KOH-ALUMINATE SOLUTIONS; CU-MG ALLOY; MICROARC OXIDATION; SURFACE-TREATMENT; METALS

Addresses: Wang YH (reprint author), Ocean Univ China, Dept Chem & Chem Engn, Qingdao 266003, Peoples R China
Ocean Univ China, Dept Chem & Chem Engn, Qingdao 266003, Peoples R China
State Key Lab Corros & Protect Met, Shenyang 110016, Peoples R China
Zhanjiang Ocean Univ, Zhanjiang 524088, Peoples R China
Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China

E-mail Addresses: wyhazz@163.com

Publisher:  ELSEVIER SCIENCE BV , PO BOX 211 , 1000 AE AMSTERDAM , NETHERLANDS

Subject Category: MATERIALS SCIENCE, MULTIDISCIPLINARY; PHYSICS, APPLIED

IDS Number: 992KC

ISSN: 0167-577X

 

25Concentration of docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) of tuna oil by urea complexation: optimization of process parameters

 

Author(s): Liu SC, Zhang CH, Hong PZ, Ji HW

Source: JOURNAL OF FOOD ENGINEERING 73 (3): 203-209 APR 2006

Document Type: Article

Language: English

Cited References: 16     

Times Cited: 0    

Abstract: Production of docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) concentrates from tuna oil was optimized. In the process, the liquid recovery yield (Y-1) and the total content of DHA and EPA (Y-2) were response variables, respectively. A three-factor central composite rotatable design (CCRD) was used to study the effect of urea-to-fatty acid ratio (XI), crystallization temperature (X-2) and crystallization time (X-3). Second order polynomial regression models for Y-1 and Y2 were employed to generate response surfaces. The total DHA and EPA (85.02%) and the liquid recovery yield (25.10%) from tuna oil were obtained at a urea-to-fatty acid ratio of 15 (mole/mole), a crystallization temperature of -5 degrees C, and a crystallization time of 20 h. (c) 2005 Elsevier Ltd. All rights reserved.

Author Keywords: tuna oil; polyunsaturated fatty acid; urea complexation; process optimization

Addresses: Zhang CH (reprint author), Zhanjiang Ocean Univ, Coll Food Sci & Technol, Zhanjiang 524025, Guangdong Peoples R China
Zhanjiang Ocean Univ, Coll Food Sci & Technol, Zhanjiang 524025, Guangdong Peoples R China
Chinese Acad Sci, S China Sea Inst Oceanol, Guangzhou 510301, Guangdong Peoples R China
Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

E-mail Addresses: zhangch@zjou.edu.cn

Publisher: ELSEVIER SCI LTD, THE BOULEVARD, LANGFORD LANE , KIDLINGTON, OXFORD OX5 1GB, OXON , ENGLAND

Subject Category: ENGINEERING, CHEMICAL; FOOD SCIENCE & TECHNOLOGY

IDS Number: 990ZJ

ISSN: 0260-8774

 

26A two-dimensional grid-like cobalt(II) coordination polymer: poly[[diaquacobalt(II)]-di-mu(2)-naphthalene-1-acetato]

 

Author(s): Liu JW (Liu, Ji-Wei), Wang WY (Wang, Wu-Yi), Gu CS (Gu, Chang-Sheng)

Source: ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE 62: M3445-M3447 Part 12, DEC 2006

Document Type: Article

Language: English

Cited References: 9     

Times Cited: 0     

Abstract: In the title compound, [Co(C12H9O2)(2)(H2O)(2)](n), the Co-II atom lies on an inversion centre and has a slightly distorted octahedral coordination environment involving four carboxylate and two water O atoms. In the crystal structure, each naphthaleneacetate ligand coordinates two metal centres through its carboxylate O atoms, adopting a bis-monodentate mode to give rise to a two-dimensional network. A three-dimensional supramolecular network is consolidated by intermolecular O-H center dot center dot center dot O hydrogen bonds.

KeyWords Plus: CRYSTAL-STRUCTURE; COMPLEX

Addresses: Liu JW (reprint author), Daqing Petr Inst, Coll Chem & Chem Technol, Daqing 163318, Peoples R China
Daqing Petr Inst, Coll Chem & Chem Technol, Daqing 163318, Peoples R China
Harbin Inst Technol, Sch Mechatron Engn,
Harbin 150001, Peoples R China
Guangdong Ocean Univ, Dept Appl Chem,
Zhanjiang 524006, Peoples R China

E-mail Addresses: liujiwei0506@163.com

Publisher: BLACKWELL PUBLISHING, 9600 GARSINGTON RD , OXFORD OX4 2DQ , OXON , ENGLAND

Subject Category: CRYSTALLOGRAPHY

IDS Number: 111EQ

ISSN: 1600-5368

 

27Poly(vinyl alcohol)/Silica nanocomposites: Morphology and thermal degradation kinetics

 

Author(s): Peng Z (Peng, Zheng), Kong LX (Kong, Ling Xue), Li SD (Li, Si-Dong), Spiridonov P (Spiridonov, Pavel)

Source: JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 6 (12): 3934-3938 DEC 2006

Document Type: Article

Language: English

Cited References: 18     

Times Cited: 0   

Abstract: The morphology of self-assembled poly(vinyl alcohol)/silica (PVA/SiO2) nanocomposites is investigated with atomic force microscopy (AFM) and transmission electron microscopy (TEM). It is found that the SiO2 nanoparticles are homogenously distributed throughout the PVA matrix in a form of spherical nano-cluster. The average size of the SiO2 clusters is below 50 nm at the low contents (SiO2 < 5 wt%), while particle aggregations are clearly observed and their average size markedly increases to 110 nm when 10 wt% SiO2 is loaded. The thermogravimetric analysis (TGA) shows that the nanocomposite significantly outperforms the pure PVA in the thermal resistance. By using a multi-heating-rate method, the thermal degradation kinetics of the nanocomposite with a SiO2 content of 5 wt% is compared to the PVA host. The reaction activation energy (E) of the nanocomposite, similar to the pure PVA, is divided into two main stages corresponding to two degradation steps. However, at a given degradation temperature, the nanocomposite presents much lower reaction velocity constants (k), while its E is 20 kJ/mol higher than that of the PVA host.

Author Keywords: poly(vinyl alcohol); silica; nanocomposite; morphology; thermal degradation; kinetics

KeyWords Plus: POLYVINYLALCOHOL/SILICA NANOCOMPOSITE

Addresses: Kong LX (reprint author), Univ S Australia, Ctr Adv Mfg Res, Mawson Lakes, SA 5095 Australia
Univ S Australia, Ctr Adv Mfg Res, Mawson Lakes, SA 5095 Australia
Agr Minist Key Lab Nat Rubber Proc, Zhanjiang 524001, Peoples R China
Guangdong Ocean Univ, Coll Sci, Zhanjiang 524088, Peoples R China

Publisher: AMER SCIENTIFIC PUBLISHERS, 25650 NORTH LEWIS WAY , STEVENSON RANCH , CA 91381-1439 USA

Subject Category: CHEMISTRY, MULTIDISCIPLINARY; NANOSCIENCE & NANOTECHNOLOGY; MATERIALS SCIENCE, MULTIDISCIPLINARY

IDS Number: 113MD

ISSN: 1533-4880

 

 

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