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金秀茶山瑶月亮床设计文化的“中国生活学”解读
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作者 谭嫄嫄 《艺术科技》 2016年第1期14-15,21,共3页
生活学研究是少数民族设计史研究中可拓展的研究视野,基于"中国生活学"的角度,对瑶族聚居区——广西金秀瑶族自治县六段村茶山瑶人民传统生活用具代表之月亮床进行田野考察。从日常食衣住行生活所构建的"生活学"维... 生活学研究是少数民族设计史研究中可拓展的研究视野,基于"中国生活学"的角度,对瑶族聚居区——广西金秀瑶族自治县六段村茶山瑶人民传统生活用具代表之月亮床进行田野考察。从日常食衣住行生活所构建的"生活学"维度出发对月亮床所蕴含的设计文化进行初步研究,有助于将设计史中物质特征的文化研究与生活情境结合起来,深化少数民族设计史研究的内容。 展开更多
关键词 “生活学” 茶山瑶 月亮床 设计文化 生活
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Herpetin, a New Bioactive Lignan Isolated from Herpetospermum caudigerum 被引量:5
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作者 袁海龙 刘毅 +1 位作者 赵艳玲 肖小河 《Journal of Chinese Pharmaceutical Sciences》 CAS 2005年第3期140-143,共4页
Aim To study the chemical constituents of seeds of Herpetospermum caudigerum. Methods Column chromatography was used in the isolation procedure, and the structure was elucidated by spectral data, whose pharmacologic a... Aim To study the chemical constituents of seeds of Herpetospermum caudigerum. Methods Column chromatography was used in the isolation procedure, and the structure was elucidated by spectral data, whose pharmacologic activity was assayed in vitro. Results A new compound named herpetin was isolated, whose structure was determined to be 3-benzofuran methanol-2, 3-dihydm-2-(4- hydroxy-3-methoxyphenyl )-4-methoxy-6-[ tetrahydm-2-( 3-hydroxy-4-methoxyphenyl )-3-methanol ]-2- furanmethyl, showed significant inhibitory effects on HBV-DNA and the replication and expression of HBsAg and HBeAg. Conclusion Herpetin offers wide research and development prospect. 展开更多
关键词 Herpetospermum caudigerum Lignan Herpetin HBV 2.2.15 cell line
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Regeneration of activated carbon adsorbed EDTA by electrochemical method 被引量:7
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作者 尤翔宇 柴立元 +3 位作者 王云燕 苏艳蓉 赵娜 舒余德 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第3期855-860,共6页
Activated carbon after saturated adsorption of EDTA was used as particle electrode in a three-dimensional electrode reactor to treat EDTA-containing wastewater.Electrochemical method was used to regenerate activated c... Activated carbon after saturated adsorption of EDTA was used as particle electrode in a three-dimensional electrode reactor to treat EDTA-containing wastewater.Electrochemical method was used to regenerate activated carbon after many times of electrolysis.Based on the analysis of infrared spectra of activated carbon after adsorption and repeated electrolysis,EDTA was degraded into glycine,and then non-catalytic activated associated complex was formed with N—H bond on the activated carbon.The catalytic ability of the activated carbon vanished and the EDTA degradation efficiency was dropped.Activated carbon could be effectively regenerated by electrochemical method in the three-dimensional reactor.Effects of electric current,conductivity and pH on activated carbon regeneration were investigated,and the optimum conditions were concluded as follows:100-300 mA of current intensity,1.39 mS/cm of electric conductivity,60 min of electrolysis time and pH 6.0-8.0.Under the optimized conditions,the activity of the activated carbon can be recovered and the residual total organic carbon(TOC) was below 10 mg/L(the initial TOC was 200 mg/L) in the three-dimensional electrode reactor. 展开更多
关键词 activated carbon electrochemical regeneration three-dimensional electrode EDTA
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Biological Activity of Several Fungicides against Ustilaginoidea virens
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作者 苏贤岩 陈雨 +2 位作者 任学祥 张爱芳 叶正和 《Agricultural Science & Technology》 CAS 2015年第10期2299-2303,共5页
[Objective] This study aims to screen for the high effective fungicides which could significantly decrease the disease incidence and disease index of rice false smut. [Method] The inhibitory activities of the fungicid... [Objective] This study aims to screen for the high effective fungicides which could significantly decrease the disease incidence and disease index of rice false smut. [Method] The inhibitory activities of the fungicide against mycelial growth of Ustilaginoidea virens were measured to in vitro evaluate the ECho values. And 17 fungicides were sprayed to evaluate the efficacy and effect of the fungicides tested in the field trials on the rice characters, [Result] The results showed that epoxicona- zole, difenoconazole, propiconazole and procloraz exhibited high inhibitory activity against mycelial growth of Ustilaginoidea virens with the ECso values 0.04, 0.07, 0.12 and 0.11 pg/ml, respectively. The results of field trials showed that the efficacy of Wen- quning, and fungicides such as difenoconazole, prochloraz, propiconazole, epoxi- conazole and their mixtures in controlling rice false smut were all 70% or more. [Conclusion] The 17 tested fungicides behaved efficacy in controlling rice false smut and did not cause drug injury on leaves and grains of rice plants, sprayed when flag leaves of rice fully expanded. 展开更多
关键词 Rice false smut Ustilaginoidea virens Fungicides Biological activity Field efficacy
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Effect of Si on growth kinetics of intermetallic compounds during reaction between solid iron and molten aluminum 被引量:13
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作者 尹付成 赵满秀 +2 位作者 刘永雄 韩炜 李智 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第2期556-561,共6页
The effect of Si on the growth kinetics of intermetallic compounds during the reaction of solid iron and molten aluminum was investigated with a scanning electron microscope coupled with an energy dispersive X-ray spe... The effect of Si on the growth kinetics of intermetallic compounds during the reaction of solid iron and molten aluminum was investigated with a scanning electron microscope coupled with an energy dispersive X-ray spectroscope, and hot-dip aluminized experiments. The results show that the intermetallic layer is composed of major Fe2Al5 and minor FeAl3. The Al-Fe-Si ternary phase, rl/rg, is formed in the Fe2Al5 layer. The tongue-like morphology of the Fe2Als layer becomes less distinct and disappears finally as the content of Si in aluminum bath increases. Si in the bath improves the prohibiting ability to the growth of Fe2Als and FeAl3. When the contents of Si are 0, 0.5%, 1.0%, 1.5%, 2.0% and 3.0%, the activation energies of Fe2Al5 are evaluated to be 207, 186, 169, 168, 167 and 172 kJ/mol, respectively. The reduction of the activation energy might result from the lattice distortion caused by Si atom penetrating into the Fe2Al5 phase. When Si atom occupies the vacancy site, it blocks easy diffusion path and results in the disappearance of tongue-like morphology. 展开更多
关键词 intermetallic compound Fe-Al system growth kinetics activation energy SI hot-dip aluminizing diffusion reaction
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Isolation and Evaluation of Nerve Growth Factor
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作者 沈正善 徐晋 +2 位作者 刘军 曹晓建 吕天润 《Journal of Nanjing Medical University》 2004年第6期320-322,共3页
Objective: to obtain the high purified and active nerve growth factor (NGF) from mouse submaxillary glands. Methods: NGF was prepared from mouse submaxillary glands by the way of elution with CM 52 column. The molecul... Objective: to obtain the high purified and active nerve growth factor (NGF) from mouse submaxillary glands. Methods: NGF was prepared from mouse submaxillary glands by the way of elution with CM 52 column. The molecular weight and purification of NGF were detected by SDS-PAGE polyacrylamide gel electrophoresis. The biological activity of NGF was verified thorough culturing DRG. Results: About 14 kDa stained band was observed on SDS-PAGE and it promoted proliferation of dorsal root gang lia (DRG). Conclusion: Good quality of NGF could be obtained with these methods. 展开更多
关键词 nerve growth factor dorsal root ganglia bioactivity
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Extraction, Purification and Identification of Bone Morphogenetic Protein in Conditioned Medium of Osteosarcoma Cell (MG-63)
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作者 吴华 冷燕奎 +2 位作者 陈安民 翟智玲 陈继革 《The Chinese-German Journal of Clinical Oncology》 CAS 2003年第4期234-236,253,共4页
Objective: To find out a method of extraction and purification of bone morphogenetic protein (BMP) from osteosarcoma cell conditioned medium, and evaluate the biological activity of BMP.Methods: Conditioned medium of ... Objective: To find out a method of extraction and purification of bone morphogenetic protein (BMP) from osteosarcoma cell conditioned medium, and evaluate the biological activity of BMP.Methods: Conditioned medium of osteosarcoma cell lines (MG-63) was collected, concentrated and dialyzed. The concentrated protein was purified through gel chromatography on Sephcryl-S-100. The purified protein was tested by BMP monoclonal antibody (McAb), its molecular weight (MW) was determined by SDS-PAGE and its biological activity was demonstrated by heterotopic ossification.Results: The purified protein was proved to be BMP by BMP McAb, had a satisfactory heterotopic ossification, and its MW was about 21 kD.Conclusion: BMP existed in the conditioned medium of osteosarcoma cell and had a satisfactory biological activity after purification. Because osteosarcoma cell can be cultured and grew for a long timein vitro, this method will be helpful to a vast extraction of BMP and clinical application. Key words osteosarcoma cell - conditioned medium - bone morphogenetic protein - protein purification This project was a key scientific and technological program of Hubei Provicial Scientific and Technological Committee (No. 002p1503). 展开更多
关键词 osteosarcoma cell conditioned medium bone morphogenetic protein protein purification
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Expression and Identification of Mycoplasma penetrans P35 Lipoprotein
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作者 朱翠明 吴移谋 +1 位作者 万艳平 余敏君 《Chinese Journal of Sexually Transmitted Infections》 2004年第2期110-114,i004,i005,共7页
Objective: To study the biological activity of Myco-plasma penetrans 35kDa lipoprotein(P35) in vitro, prokaryotic expression vector pQE31//p35 was constructed and recombinant fusion protein P35 (rP35) was expressed in... Objective: To study the biological activity of Myco-plasma penetrans 35kDa lipoprotein(P35) in vitro, prokaryotic expression vector pQE31//p35 was constructed and recombinant fusion protein P35 (rP35) was expressed in E.coli. Methods: The p35 gene was amplified by polymerase chain reaction(PCR), cloned to pQE31, and a positive clone was screened. PCR-mediated mutagenesis was used to change the two "TGA" triplets to "TGG" triplets within the p35 gene. Production of the recombinant protein was induced by the addition of IPTG to the E.coli culture. rP35 was purified with a Ni-NTA Spin Kit and rP35 purification was analyzed by Western blot. Results: About 1Kb PCR amplification was cloned into pQE31. The two "TGA" triplets within the p35 gene were successfully changed to "TGG" triplets. The pQE31/p35 vector expressed a protein with a calculated molecular mass of 37.4kDa in E.coli. Western blot indicated the 37.4kDa protein was rP35 . Conclusion: PQE31/p35, a prokaryotic expression vector containing p35 gene, was successfully constructed and expressed in E.coli. 展开更多
关键词 Mycoplasma penetrans P35 prokary-otic cell EXPRESSION
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Changes in fish diversity and community structure in the central and southern Yellow Sea from 2003 to 2015 被引量:7
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作者 CHEN Yunlong SHAN Xiujuan +3 位作者 JIN Xianshi JOHANNESSEN Arne YANG Tao DAI Fangqun 《Journal of Oceanology and Limnology》 SCIE CAS CSCD 2018年第3期805-817,共13页
The central and southern Yellow Sea is an important overwintering ground for many fish species in the Bohai Sea and Yellow Sea. For better understanding the status of the fish community after years of heavy exploitati... The central and southern Yellow Sea is an important overwintering ground for many fish species in the Bohai Sea and Yellow Sea. For better understanding the status of the fish community after years of heavy exploitation, variations in fish community structure and diversity were analyzed using data from bottom trawls during 2003–2015. Five fish assemblage indices all showed fluctuations without clear trends from 2003 to 2015, yet there were strong positive and significant correlations(P < 0.05) among them. The top-five dominant species accounted for a high weight percentage(49.7%–82.1%) in the annual fish catch. Multivariate analysis showed that two year groups could be pooled for the fish community: Group Ⅰ consisted of the years 2006, 2007, 2008 and 2015, while Group Ⅱ consisted of the years 2003, 2004, 2005, 2009, 2010 and 2014; the groups aggregated with 63.71% similarity, indicating a high level of similarity among all years. The multivariate dispersion values were 1.455 and 0.818 for Groups Ⅰ and Ⅱ, respectively, indicating greater variances in fish assemblage structure in Group Ⅰ than that in Group Ⅱ. Similarity of percentage analysis demonstrated that the average similarities for Group Ⅰ and Group Ⅱ were 71.58% and 67.51%, respectively. Size-spectra analysis revealed no consistent trend in the intercept and slope( P > 0.05); there were also no significant differences between the slope of the size-spectra and fishing ef fort. The catch per unit ef fort and mean individual weight analyses of the whole fish assemblage both showed a significantly decreasing trend over time. Overall, the results showed that the fish community structure in the central and southern Yellow Sea was relatively stable from 2003 to 2015 and the study could be used as a reference for supporting ecosystem-based fishery management. 展开更多
关键词 dominant species fish community structure multivariate analysis trawl data
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The Drosophila ovary: an active stem cell community 被引量:8
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作者 Daniel Kirilly Ting Xie 《Cell Research》 SCIE CAS CSCD 2007年第1期15-25,共11页
Only a small number of cells in adult tissues (the stem cells) possess the ability to self-renew at every cell division, while producing differentiating daughter cells to maintain tissue homeostasis for an organism... Only a small number of cells in adult tissues (the stem cells) possess the ability to self-renew at every cell division, while producing differentiating daughter cells to maintain tissue homeostasis for an organism's lifetime. The Drosophila ovary harbors three different types of stem cell populations (germline stem cell (GSC), somatic stem cell (SSC) and escort stem cell (ESC)) located in a simple anatomical structure known as germarium, rendering it one of the best model systems for studying stem cell biology due to reliable stem cell identification and available sophisticated genetic tools for manipulating gene functions. Particularly, the niche for the GSC is among the first and best studied ones, and studies on the GSC and its niche have made many unique contributions to a better understanding of relationships between stem cells and their niche. So far, both the GSC and the SSC have been shown to be regulated by extrinsic factors originating from their niche and intrinsic factors functioning within. Multiple signaling pathways are required for controlling GSC and SSC self-renewal and differentiation, which provide unique opportunities to investigate how multiple signals from the niche are interpreted in the stem cell. Since the Drosophila ovary contains three types of stem cells, it also provides outstanding opportunities to study how multiple stem cells in a given tissue work collaboratively to contribute to tissue function and maintenance. This review highlights recent major advances in studying Drosophila ovarian stem cells and also discusses future directions and challenges. 展开更多
关键词 Drosophila ovary germline stem cell somatic stem cell escort stem cell
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Genomic selection methods for crop improvement:Current status and prospects 被引量:16
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作者 Xin Wang Yang Xu +1 位作者 Zhongli Hu Chenwu Xu 《The Crop Journal》 SCIE CAS CSCD 2018年第4期330-340,共11页
With marker and phenotype information from observed populations, genomic selection (GS) can be used to establish associations between markers and phenotypes. It aims to use genome-wide markers to estimate the effect... With marker and phenotype information from observed populations, genomic selection (GS) can be used to establish associations between markers and phenotypes. It aims to use genome-wide markers to estimate the effects of all loci and thereby predict the genetic values of untested populations, so as to achieve more comprehensive and reliable selection and to accelerate genetic progress in crop breeding. GS models usually face the problem that the number of markers is much higher than the number of phenotypic observations. To overcome this issue and improve prediction accuracy, many models and algorithms, including GBLUP, Bayes, and machine learning have been employed for GS. As hot issues in GS research, the estimation of non-additive genetic effects and the combined analysis of multiple traits or multiple environments are also important for improving the accuracy of prediction. In recent years, crop breeding has taken advantage of the development of GS. The principles and characteristics of current popular GS methods and research progress in hese methods for crop improvement are reviewed in this paper. 展开更多
关键词 Genomic selection PREDICTION ACCURACY CROP
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Expression of the Phycoerythrin Gene of Gracilaria lemaneiformis (Rhodophyta) in E. coli and Evaluation of the Bioactivity of Recombinant PE 被引量:4
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作者 WEN Ruobing SUI Zhenghong +2 位作者 ZHANG Xuecheng ZHANG Shuang QIN Song 《Journal of Ocean University of China》 SCIE CAS 2007年第4期373-377,共5页
Phycoerythrin (PE) is one of the most important proteins involved in light capturing during photosynthesis in red algae. Its potential biological activities had gained wide concerns. In the present study, tumor cyto... Phycoerythrin (PE) is one of the most important proteins involved in light capturing during photosynthesis in red algae. Its potential biological activities had gained wide concerns. In the present study, tumor cytotoxic and hydroxyl radical assay were preformed to detect the bioactivity of recombinant PE. Recombinant plasmids pGEX-PE and pBGL were transformed into E.coli BL21 to make two recombinant strains BEX (pGEX-PE) and BGL (pBGL). PE expressing in BEX (pGEX-PE) was validated by SDS-PAGE and Western blotting analysis. SDS-PAGE analysis indicated that the PE-GST fusion protein was mostly inclusion bodies. Specific expression of PE was confirmed by Western blotting analysis. The recombinant E. coli BEX (pGEX-PE) cells were collected and sonicated. The supernatants were reserved for the tumor cytotoxic experiments. The result of tumor cytotoxic assay indicated that the supernatants containing PE had the activity of inhibiting the growth of Hela cells and with the increase of protein concentration, the inhibiting rate increased from 37.31% to 63.26%, which showed significant difference from the control. Hydroxyl radical scavenging effect was tested with supernatants of BEX (pGEX-PE) and BGL (pBGL) cell lysates treated with sonication and heating. For the sonication samples, the scavenging rates of the supernatants of BEX (pGEX-PE) and BGL (pBGL) cell lysates were significantly higher than the negative control BL2 I(pGEX-4T) (P〈0.02), and the scavenging rates increased slowly following the increase of the protein content. For the heating samples, except for the 0.2 mgmL^-1 BGL (pBGL) products, the scavenging effects of the supernatants of BEX (pGEX-PE) and BGL (pBGL) cell lysates were stronger than that of negative control BL21(pGEX-4T). However, the effect intensity was not positively correlated with the increase of the protein concentration. Though a partially decreased hydroxyl radical scavenging activity was led by heating, the biological activity was still retained and conspicuous. This research showed that phycoerythrin protein expressing in E. coli has the potential medical and sanitarian value. 展开更多
关键词 biology activity CYTOTOXICITY hydroxyl radicals recombinant PE
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Alterations of biliary biochemical constituents and cytokines in infantile hepatitis syndrome 被引量:19
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作者 Yan Ding Lei Zhao +2 位作者 Hong Mei Zhi-Hua Huang Shu-Ling Zhang 《World Journal of Gastroenterology》 SCIE CAS CSCD 2006年第43期7038-7041,共4页
AIM: To investigate the biliary biochemical constituents and cytokines in infantile hepatitis syndrome (IHS). METHODS: From 42 IHS subjects and 21 controls, serum and biliary biochemical constituents, including total ... AIM: To investigate the biliary biochemical constituents and cytokines in infantile hepatitis syndrome (IHS). METHODS: From 42 IHS subjects and 21 controls, serum and biliary biochemical constituents, including total bilirubin (TBIL), direct bilirubin (DBIL), alanine aminotransferase (ALT), gamma-glutamyl transpeptidase (γ-GT), total bile acid (TBA), interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α) both in bile and serum, were assayed. The subjects with IHS were divided into a cholestasis group (n = 21) and a hepatitis group (n = 21). RESULTS: In the cholestasis group, serum TBIL, DBIL, ALT, γ-GT, TBA, IL-6 and TNF-α levels were higher than those in the control (P < 0.01); and also the biliary TBIL, DBIL, γ-GT and TBA levels were lower than those in the control, whereas biliary IL-6 and TNF-α levels were higher than those in the control (P < 0.01). In the cholestasis group, serum IL-6 and TNF-α levels were lower than those in bile (P < 0.01). In the hepatitis group, serum DBIL, ALT, γ-GT, TBA, IL-6 and TNF-α levels were higher than those in the control (P < 0.01 or 140.57 ± 70.32 vs 79.06 ± 35.25, P < 0.05), while biliary TBIL, DBIL, γ-GT and TBA levels were lower than those in the control (P < 0.01), and biliary IL-6 and TNF-α levels were higher than those in the control (P < 0.01). In the hepatitis group, serum IL-6 and TNF-α levels were also lower than those in bile (P < 0.01). Serum TBIL, DBIL, γ-GT, IL-6 and TNF-α levels in the cholestasis group were higher than those in the hepatitis group, while biliary IL-6 and TNF-α levels in the cholestasis group were higher than those in the hepatitisgroup. Biliary IL-6 and TNF-α were found to be more significantly increased than serum IL-6 and TNF-α in IHS (P < 0.01). The biliary IL-6 and TNF-α levels were positively correlated with serum DBIL, TBA and γ-GT levels in IHS subjects. CONCLUSION: Biliary biochemical constituents alter in coincidence with pathological changes in hepatocellular injury. Cholestasis is more serious in IHS patients of cholestasis subtype. Assay of biliary IL-6 and TNF-α levels can be specific and sensitive to determine the inflammatory status of impaired liver in IHS. 展开更多
关键词 Infantile hepatitis syndrome Biliarybiochemical constituents Biliary cytokines INTERLEUKIN-6 Tumor necrosis factor-α
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Antioxidant enzyme activities in different genders and tissues of amphioxus Branchiostoma belcheri tsingtauense 被引量:3
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作者 魏然 张士璀 +1 位作者 王长法 庞秋香 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2007年第1期73-77,共5页
Information regarding antioxidant enzymes in amphioxus remains lacking, and this study was carried out to examine the activities of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPX) in differ... Information regarding antioxidant enzymes in amphioxus remains lacking, and this study was carried out to examine the activities of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPX) in different genders and tissues of amphioxus Branchiostoma belcheri tsingtauense. Results show that (1) CuZn-SOD, CAT and GPX activities in the whole amphioxus B. belcheri tsing- tauense were basically at the same levels in male and female amphioxus, whereas both T-SOD and Mn-SOD activities in male amphioxus were significantly higher than that in the female (P<0.05); (2) The testis had significantly higher T-SOD and CuZn-SOD activities than the ovary (P<0.05); (3) CuZn-SOD activity was undetectable in the guts of male and female amphioxus; (4) For both male and female am- phioxus, the activities of CAT and GPX in the gonads including testis and ovary were the lowest (P<0.05) among the tissues examined; (5) The gut and gill had the same level GPX activities while the gut had a higher CAT activity; (6) There was no clear difference in CAT and GPX activities in the corresponding tissues between male and female amphioxus. The study on SOD, CAT and GPX activities in different genders and tissues of the protochordate provides data for future comparison of amphioxus antioxidant enzymes with those of invertebrates and vertebrates. 展开更多
关键词 AMPHIOXUS antioxidant enzymes catalase (CAT) glutathione peroxidase (GPX) superoxidedismutase (SOD)
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Temperature acclimation affects thermal preference and tolerance in three Eremias lizards(Lacertidae) 被引量:9
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作者 Hong LI Zheng WANG +1 位作者 Wenbin MEI Xiang JI 《Current Zoology》 SCIE CAS CSCD 北大核心 2009年第4期258-265,共8页
We acclimated adult males of three Eremias lizards from different latitudes to 28℃,33℃ or 38℃ to examine whether temperature acclimation affects their thermal preference and tolerance and whether thermal preference... We acclimated adult males of three Eremias lizards from different latitudes to 28℃,33℃ or 38℃ to examine whether temperature acclimation affects their thermal preference and tolerance and whether thermal preference and tolerance of these lizards correspond with their latitudinal distributions.Overall,selected body temperature(Tsel)and viable temperature range(VTR)were both highest in E.brenchleyi and lowest in E.multiocellata,with E.argus in between;critical thermal minimum(CTMin)was highest in E.multiocellata and lowest in E.brenchleyi,with E.argus in between;critical thermal maximum(CTMax)was lower in E.multiocellata than in other two species.Lizards acclimated to 28℃ and 38℃ overall selected lower body temperatures than those acclimated to 33℃;lizards acclimated to high temperatures were less tolerant of low temperatures,and vice versa;lizards acclimated to 28℃ were less tolerant of high temperatures but had a wider VTR range than those acclimated to 33℃ and 38℃.Lizards of three species acclimated to the three temperatures always differed from each other in CTMin,but not in Tsel,CTMax and VTR.Our results show that:temperature acclimation plays an important role in influencing thermal preference and tolerance in the three Eremias lizards,although the degrees to which acclimation temperature affects thermal preference and tolerance differ among species;thermal preference rather than tolerance of the three Eremias lizards corresponds with their latitudinal distributions. 展开更多
关键词 LIZARDS EREMIAS Acclimation temperature Thermal preference Thermal tolerance Viable temperature range Food assimilation
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Construction of a Metagenomic DNA Library of Sponge Symbionts and Screening of Antibacterial Metabolites 被引量:3
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作者 CHEN Juan ZHU Tianjiao +6 位作者 LI Dehai CUI Chengbin FANG Yuchun LIU Hongbing LIU Peipei GU Qianqun ZHU Weiming 《Journal of Ocean University of China》 SCIE CAS 2006年第2期119-122,共4页
To study the bioactive metabolites produced by sponge-derived uncultured symbionts, a metagenomic DNA library of the symbionts of sponge Gelliodes gracilis was constructed. The average size of DNA inserts in the libra... To study the bioactive metabolites produced by sponge-derived uncultured symbionts, a metagenomic DNA library of the symbionts of sponge Gelliodes gracilis was constructed. The average size of DNA inserts in the library was 20 kb. This library was screened for antibiotic activity using paper disc assaying. Two clones displayed the antibacterial activity against Micrococcus tetragenus. The metabolites of these two clones were analyzed through HPLC. The result showed that their metabolites were quite different from those of the host E. coli DNA and the host containing vector pHZ132. This study may present a new approach to exploring bioactive metabolites of sponge symbionts. 展开更多
关键词 metagenomic DNA library SPONGE SYMBIONTS METABOLITE bioactivity
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Toxicity of cadmium to soil microbial biomass and its activity:Effect of incubation time on Cd ecological dose in a paddy soil 被引量:1
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作者 廖敏 罗运阔 +1 位作者 赵小敏 黄昌勇 《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 SCIE EI CAS CSCD 2005年第5期324-330,共7页
Cadmium (Cd) is ubiquitous in the human environment and has toxic effect on soil microbial biomass or its activity, including microbial biomass carbon (Cmic), dehydrogenase activity (DHA) and basal respiration (BR), e... Cadmium (Cd) is ubiquitous in the human environment and has toxic effect on soil microbial biomass or its activity, including microbial biomass carbon (Cmic), dehydrogenase activity (DHA) and basal respiration (BR), etc., Cmic, DHA, BR were used as bioindicators of the toxic effect of Cd in soil. This study was conducted to determine the effects of Cd on soil microbial biomass and its activity in a paddy soil. The inhibition of microbial biomass and its activity by different Cd concentrations was described by the kinetic model (M1) and the sigmoid dose-response model (M2) in order to calculate three ecological doses of Cd: ED50, ED10 and ED5. Results showed that M2 was better fit than M1 for describing the ecological toxicity dose effect of cadmium on soil microbial biomass and its activity in a paddy soil. M2 for ED values (mg/kg soil) of Cmic, DHA, BR best fitted the measured paddy soil bioindicators. M2 showed that all ED values (mg/kg) increased in turn with increased incubation time. ED50, ED10 and ED5 of Cmic with M2 were increased in turn from 403.2, 141.1, 100.4 to 1000.7, 230.9, 144.8, respectively, after 10 d to 60 d of incubation. ED50, ED10 and ED5 of DHA with M2 increased in turn from 67.6, 6.2, 1.5 to 101.1, 50.9, 41.0, respectively, after 10 d to 60 d of incubation. ED50, ED10 and ED5 of BR with M2 increased in turn from 149.7, 6.5, 1.8 to 156.5, 50.8, 35.5, respectively, after 10 d to 60 d of incubation. So the ecological dose increased in turn with increased incubation time for M2 showed that toxicity of cadmium to soil microbial biomass and its activity was decreased with increased incubation time. 展开更多
关键词 CADMIUM Soil microbial biomass Basal respiration Dehydrogenase activity Ecological dose Paddy soil
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Teaching Religious Education in Schools and Adolescents' Social and Emotional Development. An Action Research on the Role of Religious Education and School Community in Adolescents' Lives 被引量:1
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作者 Marios Koukounaras Liagkis 《Cultural and Religious Studies》 2016年第2期121-133,共13页
The presentation of the findings of this article is based on an action research focused on the supportive role of the school in adolescents' lives, whereby Religious Education's contribution to the social and emotio... The presentation of the findings of this article is based on an action research focused on the supportive role of the school in adolescents' lives, whereby Religious Education's contribution to the social and emotional development of adolescents (11-15) is combined with the evaluation of the potential offered by a constructivist approach to the learning process. The research commenced in 2012 and is now in its third "year. The project is based on an intervention at a high school in an impoverished suburb of Athens and researches educational practices through interpretative-ethnographic methods. The researcher has attempted to answer the question of whether the design of the learning environments is effective not only in the learning process, but also on inter-communication and "connectedness" between the members of the learning community. The findings so far indicate a correlation between adolescents' emotional and social wellbeing and the school's approach to knowledge and learning methods, specifically in Religious Education classes. It is fair to say, however, that there exist ethnic, social and family components that are negatively related to a sense of"connectedness" within the school although at the same time Religious Education as a subject is, however, found to be positively related to learning community atmosphere. 展开更多
关键词 Religious Education well being action research CONSTRUCTIVISM learning community
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Alteration of certain soil microbiological and biochemical indices of a paddy soil under anthropogenic stress 被引量:2
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作者 AbidSubhani 廖明 +1 位作者 黄昌勇 谢正苗 《Journal of Zhejiang University Science》 CSCD 2002年第4期467-474,共8页
A 21-day laboratory incubation experiment was conducted to investigate the impact of pesticides (insecticide, herbicide, fungicide) on paddy field soil health under controlled moisture (flooded soil) and temperature (... A 21-day laboratory incubation experiment was conducted to investigate the impact of pesticides (insecticide, herbicide, fungicide) on paddy field soil health under controlled moisture (flooded soil) and temperature (25 ℃) environment. The electron transport system (ETS)/Dehydrogenase activity showed negative correlation with pesticides concentrations, decreased with increase of pesticide concentration. The higher doses(5 to 10 times field rates) of pesticides significantly inhibited ETS activity, while lower rates failed to produce any significant reducing effect on the control. The toxicity of pesticides in decreasing the ETS activity was in the order: insecticide > fungicide > herbicide, irrespective of their rates of application. The pesticides increased the soil phenol content, which increased with increasing concentration of agrochemicals. The pesticide application did not produce any significant change in soil protein content. The response of biomass phospholipid content was nearly similar to that of ETS activity. The phospholipid content decreased with the addition of pesticides in the order insecticide > fungicide > herbicide and the toxicity was in the order: 10 FR (field rate) > 5 FR > 1.0 FR > 0.5 FR > control. 展开更多
关键词 Electron transport system (ETS) activity Phenol PHOSPHOLIPIDS Protein PESTICIDES Submerged soil
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Rheological and Structural Properties of Sea Cucumber Stichopus japonicus During Heat Treatment 被引量:12
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作者 GAO Xin XUE Dongmei +2 位作者 ZHANG Zhaohui XU Jiachao XUE Changhu 《Journal of Ocean University of China》 SCIE CAS 2005年第3期244-247,共4页
Changes in tissue structure, rheological properties and water content of raw and heated sea cucumber meat were studied. Sea cucumber Stichopus japonicus was heated at 25℃, 70℃ and 100℃ water for 5 min. The structur... Changes in tissue structure, rheological properties and water content of raw and heated sea cucumber meat were studied. Sea cucumber Stichopus japonicus was heated at 25℃, 70℃ and 100℃ water for 5 min. The structural changes were observed using a light microscope and the rheological parameters (rupture strength, adhesive strength and deformation) determined using a texture meter. Microscopic photograph revealed that the structural change of heated meat was greater than that of raw meat. The rupture strength, adhesive strength and deformation of raw meat were smaller than those of the heated meat. Meanwhile, rheological parameters showed positive correlation with heating temperature. These changes are mainly caused by thermal denaturation and gelatinization of collagen during heating. These changes were also evidenced in observations using a light microscope and differential scanning calorimetry. 展开更多
关键词 sea cucumber COLLAGEN muscle fibers rheological properties
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