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脑活素类生物制剂中锰、钴、镍的测定 被引量:2
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作者 刘伟明 刘巨涛 +1 位作者 朱志国 冷红霞 《广东微量元素科学》 CAS 2000年第1期38-40,共3页
用火焰原子吸收法直接测定了八种不同品牌的脑活素类生物制剂中锰、钴、镍的含量。将七种国产品牌制剂与奥地利(EBEWE)脑活素(对照组)微量元素含量间进行比较,统计结果表明:Mn,五种差异非常显著(P<0.01),一种差... 用火焰原子吸收法直接测定了八种不同品牌的脑活素类生物制剂中锰、钴、镍的含量。将七种国产品牌制剂与奥地利(EBEWE)脑活素(对照组)微量元素含量间进行比较,统计结果表明:Mn,五种差异非常显著(P<0.01),一种差异显著(P<0.05),一种无显著差异(P>0.05); Co,六种差异非常显著(P< 0.01),一种无显著差异( P> 0.05) ; Ni,五种差异非常显著(P<0.01),两种无显著差异(P>0.05)。本结果为临床合理用药提供了有用数据。 展开更多
关键词 火焰原子吸收法 生物制剂 微量元
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高分子生物抗菌胶膜的研制及抗菌效果与性能的检测 被引量:3
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作者 王洪林 权力敏 《预防医学论坛》 2008年第8期735-738,共4页
[目的]选择天然橡胶和抗菌活性物质研制成高分子生物抗菌胶膜,对其抗菌效果与性能(稳定性、腐蚀性、影响因素、毒性)进行了检测,为评价、验证、应用该产品的抗菌能力及特性提供依据。[方法]抑菌振荡烧瓶试验测定其抗菌效果和稳定性、腐... [目的]选择天然橡胶和抗菌活性物质研制成高分子生物抗菌胶膜,对其抗菌效果与性能(稳定性、腐蚀性、影响因素、毒性)进行了检测,为评价、验证、应用该产品的抗菌能力及特性提供依据。[方法]抑菌振荡烧瓶试验测定其抗菌效果和稳定性、腐蚀性、影响因素;小鼠毒理实验测定其毒性。[结果]高分子生物抗菌胶膜是以天然橡胶、海洋生物复合酶、海藻酸聚多糖、海洋甲壳胺活素为主要成分,经特殊工艺胶炼铸成。生物抗菌胶膜对大肠杆菌、金黄色葡萄球菌、白色念珠菌作用10 min,抗菌率均达99.99%;置54℃下放置14 d,37℃相对湿度80%,放置90 d抑菌效果无明显影响;对不锈钢、铜无腐蚀,对碳钢、铝基本无腐蚀性;有机物50%小牛血清对该品抗菌效果无明显影响。对小鼠经口LD50>5 000 mg/kg属实际无毒级;蓄积毒性试验为弱蓄积毒性;蓄积系数k>5;眼刺激试验积分为3.0分,属无刺激性;急性皮肤刺激试验积分为0分,属无刺激性;小鼠骨髓嗜多染红细胞微核试验为阴性,无致突变性;精子畸形试验结果为阴性。[结论]高分子生物抗菌胶膜抗菌效果好、稳定性强、无毒、无味、无刺激性、不受干扰因素影响。 展开更多
关键词 高分子生物抗菌胶膜 复合生物活素 抑菌试验 抗菌效果 毒性 稳定性 腐蚀性 影响因
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怎样正确使用维生素
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作者 杨龙骐 彭义 《郑州牧业工程高等专科学校学报》 1994年第1期15-23,共9页
早在19世纪后期,人们就猜测到饲料中动物所需要的营养成分除了蛋白质、碳水化合物、脂肪和盐等之外,还可能有其他物质,后来把这些其他物质统称为“辅助因子”(Accessory food factor).Eikman于1987年证实这种辅助因子是硫胺素(tkiami... 早在19世纪后期,人们就猜测到饲料中动物所需要的营养成分除了蛋白质、碳水化合物、脂肪和盐等之外,还可能有其他物质,后来把这些其他物质统称为“辅助因子”(Accessory food factor).Eikman于1987年证实这种辅助因子是硫胺素(tkiamine,VB<sub>1</sub>),它能防止鸡的一种脚气病样疾病〔1〕.随后McCollum等(1913)和Osborne等(1913分别在黄油对大鼠生长作用的试验中发现了VA及其功能,当时McCollum将这种不明的生长因子称作“脂溶性A”.Vitamin(维生素)一词由Vitamine变化而来,还有的称为“生物催化剂”、“生物活素”、“微量营养素”等.现在普遍认为维生素是一类维持机体正常代谢和机能所必需的一类低分子有机化合物. 展开更多
关键词 辅助因子 生物活素 营养成分 微量营养 大鼠 动物实验 生长作用 生物催化剂 VITAMIN 生长因子
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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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晓捷信箱
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《四川戏剧》 北大核心 1994年第6期72-72,共1页
晓捷信箱秋季护肤话膳食成都小乔问:酷署过去,怡人的秋天来临,秋天的气候真叫人心旷神怡。但在这舒心的日子里,却让人有一丝丝的烦恼。作为节目主持人的我。在秋季更感皮肤干燥,且也觉得口干舌燥。请问怎样才能消除或减轻这些现象... 晓捷信箱秋季护肤话膳食成都小乔问:酷署过去,怡人的秋天来临,秋天的气候真叫人心旷神怡。但在这舒心的日子里,却让人有一丝丝的烦恼。作为节目主持人的我。在秋季更感皮肤干燥,且也觉得口干舌燥。请问怎样才能消除或减轻这些现象?答:秋天,秋高气爽,气候宜人。但... 展开更多
关键词 皮肤干燥 膳食营养 人的皮肤 皮肤皲裂 秋燥 使人 食物纤维 生物活素 白萝卜 润肤
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Synthesis and Antibacterial Activities of Erythromycin Derivatives
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作者 冯润良 宫平 赵燕芳 《Journal of Chinese Pharmaceutical Sciences》 CAS 2006年第4期215-222,共8页
Aim To synthesize 4″-carbamate derivatives of erythromycin and test their antibacterial activities in vitro. Methods New erythromycin antibacterial agents containing 4″-carbamate group were designed and synthesized ... Aim To synthesize 4″-carbamate derivatives of erythromycin and test their antibacterial activities in vitro. Methods New erythromycin antibacterial agents containing 4″-carbamate group were designed and synthesized from azithromycin via protection, aminoformylation, amination and deprotection. Their antibacterial activities against Staphylococcus aureus strains were tested. Results Nine compounds were synthesized. Their structures were confirmed by MS, IR, ~ 1 H NMR and ~ 13 C NMR, and the synthetic conditi... 展开更多
关键词 Erythromycin derivatives SYNTHESIS antibacterial activities
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Isolation,Screening and Identification of High-temperature Cellulolytic Microbes in Pig Manure 被引量:5
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作者 郭艳 张进良 Jin-liang 《Agricultural Science & Technology》 CAS 2010年第5期28-30,147,共4页
[Objective] The research aimed to lay the foundation for high-efficiency biological degradation microbial inoculums. [Method] under the 60℃ temperature the cellulolytic microbes in pig manure were isolated and determ... [Objective] The research aimed to lay the foundation for high-efficiency biological degradation microbial inoculums. [Method] under the 60℃ temperature the cellulolytic microbes in pig manure were isolated and determined the CMCase and Fpase,then proceeded the 16S rRNA gene analysis. [Result]The results showed that:BC1 and BC3 strains characterized higher carboxymethyl cellulose enzyme activity and higher filter paper activity,but their difference was small,then the 16S rDNA sequence of BC1 and BC3 strains were related to pseudomonas sp. (98% and 99% similarities,respectively).[Conclusion] the experiment laid foundation for high-efficiency biological heating agent. 展开更多
关键词 Pig manure High-temperature cellulolytic microbes 16S rRNA gene
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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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Effect of biologically active fraction of Nardostachys jatamansi on cerulein-induced acute pancreatitis 被引量:4
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作者 Gi-Sang Bae Min-Sun Kim +10 位作者 Kyoung-Chel Park Bon Soon Koo Il-Joo Jo Sun Bok Choi Dong-Sung Lee Youn-Chul Kim Tae-Hyeon Kim Sang-Wan Seo Yong Kook Shin Ho-Joon Song Sung-Joo Park 《World Journal of Gastroenterology》 SCIE CAS CSCD 2012年第25期3223-3234,共12页
AIM: To determine if the fraction of Nardostachysjata- mansi (N J) has the potential to ameliorate the severity of acute pancreatitis (AP). METHODS: Mice were administered the biologically active fraction of N J... AIM: To determine if the fraction of Nardostachysjata- mansi (N J) has the potential to ameliorate the severity of acute pancreatitis (AP). METHODS: Mice were administered the biologically active fraction of N J, i.e., the 4th fraction (N J4), intra- peritoneally, and then injected with the stable chole- cystokinin analogue cerulein hourly for 6 h. Six hours after the last cerulein injection, the pancreas, lung, and blood were harvested for morphological examination,measurement of cytokine expression, and examination of neutrophil infiltration. RESULTS: N J4 administration attenuated the sever- ity of AP and lung injury associated with AP. It also reduced cytokine production and neutrophil infiltration and resulted in the in vivo up-regulation of heine oxy- genase-1 (HO-1). Furthermore, NJ4 and its biologically active fraction, N J4-2 inhibited the cerulein-induced death of acinar cells by inducing HO-1 in isolated pan- creatic acinar cells. CONCLUSION: These results suggest that N J4 may be a candidate fraction offering protection in AP and N J4 might ameliorate the severity of pancreatitis by induc- ing HO-1 expression. 展开更多
关键词 Nardostachysjatamansi Acute pancreatitis CYTOKINES Heine oxygenase-1
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Is kinase activity essential for biological functions of BRI1? 被引量:10
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作者 Weihui Xu Juan Huang +2 位作者 Baohua Li Jiayang Li Yonghong Wang 《Cell Research》 SCIE CAS CSCD 2008年第4期472-478,共7页
Brassinosteroids (BRs) are a major group of plant hormones that regulate plant growth and development. BRI1, a protein localized to the plasma membrane, functions as a BR receptor and it has been proposed that its k... Brassinosteroids (BRs) are a major group of plant hormones that regulate plant growth and development. BRI1, a protein localized to the plasma membrane, functions as a BR receptor and it has been proposed that its kinase activity has an essential role in BR-regulated plant growth and development. Here we report the isolation and molecular characterization of a new allele of bril, bril-301, which shows moderate morphological phenotypes and a reduced response to BRs under normal growth conditions. Sequence analysis identified a two-base alteration from GG to AT, resulting in a conversion of 989G to 9891 in the BRI1 kinase domain. An in vitro assay of kinase activity showed that bril-301 has no detectable autophosphorylation activity or phosphorylation activity towards the BRI1 substrates TTL and BAK1. Furthermore, our results suggest that bril-301, even with extremely impaired kinase activity, still retains partial function in regulating plant growth and development, which raises the question of whether BRI1 kinase activity is essential for BR-mediated growth and development in higher plants. 展开更多
关键词 BRASSINOSTEROID bril kinase activity Arabidopsis thaliana
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Root Zone Microbial Populations, Urease Activities, and Purification Efficiency for a Constructed Wetland 被引量:7
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作者 LIANGWei WUZhen-Bin +1 位作者 ZHANFa-Cui DENGJia-Qi 《Pedosphere》 SCIE CAS CSCD 2004年第3期401-404,共4页
In order to investigate the effects of microorganisms and their urease activities in macrophytic root zones on pollutant removal, four small-scale plots (SSPs) of vertical/reverse-vertical flow wetlands were set up to... In order to investigate the effects of microorganisms and their urease activities in macrophytic root zones on pollutant removal, four small-scale plots (SSPs) of vertical/reverse-vertical flow wetlands were set up to determine: a) the relationship between the abundance of microorganisms in the root zones and water purification efficiency; and b) the relationship between urease activities in the root zones and pollutant removal in a constructed wetland system. Total numbers of the microbial population (bacteria, fungi, and actinomyces) along with urease activities in the macrophytic root zones were determined. In addition, the relationships between microbial populations and urease activities as well as the wastewater purification efficiencies of total phosphorus (TP), total Kjeldahl nitrogen (TKN), biochemical oxygen demand in 5 days (BOD5), and chemical oxygen demand (COD) were also analyzed. The results showed that there was a highly significant positive correlation (r = 0.9772, P < 0.01) between the number of bacteria in the root zones and BOD5 removal efficiency and a significant negative correlation (r = -0.9092, P < 0.05) between the number of fungi and the removal efficiency of TKN. Meanwhile, there was a significant positive correlation (r -- 0.8830, P < 0.05) between urease activities in the root zones and the removal efficiency of TKN. Thus, during wastewater treatment in a constructed wetland system,microorganism and urease activities in the root zones were very important factors. 展开更多
关键词 macrophytic root zone microbial population purification efficiency ureaseactivity WETLAND
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Evaluation of mouse bioassay results in an inter-laboratory comparison for paralytic shellfish poisoning toxins 被引量:1
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作者 曹际娟 郑江 +3 位作者 于兵 王秋艳 徐君怡 李爱峰 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2011年第4期912-916,共5页
An inter-laboratory comparison of the AOAC mouse bioassay for paralytic shellfish poisoning (PSP) toxicity in shellfish was carried out among 25 Chinese laboratories to examine the overall performance for PSP testing ... An inter-laboratory comparison of the AOAC mouse bioassay for paralytic shellfish poisoning (PSP) toxicity in shellfish was carried out among 25 Chinese laboratories to examine the overall performance for PSP testing in China, and to analyze the main factors affecting the performance of this method. The toxic scallop Patinopecten yessoensis collected from coast of Bohai Sea, China, was used as a test sample in the comparison study. The results were reported and evaluated using robust statistical methods. The z scores showed that 80%, 8%, and 12% of laboratories reported satisfactory results, unsatisfactory results, and questionable results, respectively. This evaluation demonstrates that the PSP mouse bioassay is an appropriate method for screening and testing PSP toxicity in shellfish. However, it was found that the experience and skill of technicians, as well as the body weight and health status of mice being used significantly affected the accuracy of the method. 展开更多
关键词 paralytic shellfish poisoning (PSP) mouse bioassay inter-laboratory comparison
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Immunomodulatory function of orally administered thymosin α1 被引量:1
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作者 陈祥明 蒋汉梁 +5 位作者 周林福 潘小平 胡中荣 刘荣华 陈晓明 陈智 《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 SCIE CAS CSCD 2005年第9期873-876,共4页
Objective: To investigate the immunological function of a yeast expression system for thymosin α1 (Tα1). Methods: A constructed Tetl yeast expression system was used to investigate the immunological function of ... Objective: To investigate the immunological function of a yeast expression system for thymosin α1 (Tα1). Methods: A constructed Tetl yeast expression system was used to investigate the immunological function of orally administered Tα1. Dried yeast containing three different concentration of Tα1 was fed to normal Balb/c mice and other Balb/c mice whose immunities were inhibited in advance by cyclophosphamide. Synthesized Tα1 peptide was used as positive control and dried yeast with empty plasmid was used as negative control. CD4^+ and CD8^+ levels were detected by flow cytometry assay. TNF-α, IFN-γ, IL-2, IL-6 and IL-10 levels were detected by liquid chip. Results: In normal Balb/c mice or immune inhibition Balb/c mice, CD8^+ levels were significantly increased. Especially in immune inhibition Balb/c mice, CD8^+ levels in synthesized Tα1 group (18.77%±4.72%), small dose group (13.48%±6.17%) and large dose group (22.74%±1.09%) were significantly higher than that in empty yeast control group (7.49%±2.14%). Conclusion: Orally administered Tα1 has its certain immunomodulatory function. 展开更多
关键词 Thymosin α1 Yeast expression system Biological activity Orally administered
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Sustainable Activated Carbons from Agricultural Residues Dedicated to Antibiotic Removal by Adsorption 被引量:3
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作者 Jonatan Torres-Pérez Claire Gérente Yves Andrès 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2012年第3期524-529,共6页
The. objectives.of this study are to convert at laboratory s.cale agric.ultural residues into activated carbons (AC) with specific properties, to characterize them and to test them in adsorption reactor for tetracyc... The. objectives.of this study are to convert at laboratory s.cale agric.ultural residues into activated carbons (AC) with specific properties, to characterize them and to test them in adsorption reactor for tetracycline removal, a common antibiotic. Two new ACs were produced by direct activation with steam from beet pulp (BP-H2O) and peanut hu_lls (PH-H2O) in environmental friendly conditions BP-H2O and PH-H2Opresentcarbon content rangedcarbons with different intrinsic properties. 展开更多
关键词 activated carbon ADSORPTION antibiotic characterisation waste valorisation water treatment
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Analysis of Causes Leading to High Bromine Number of C_8^+ Aromatics and Short Clay Service Life and Countermeasures Proposed
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作者 Li Yousong Ni Xiaoliang Yah Jun 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2007年第2期23-28,共6页
After comparing the operating status of other catalytic reforming units and evaluation of the side-cut stream tests, the refinery investigated the influence of the feedstock property, clay types, and operating regime ... After comparing the operating status of other catalytic reforming units and evaluation of the side-cut stream tests, the refinery investigated the influence of the feedstock property, clay types, and operating regime of the clay tower and catalytic reforming unit on the service life of the clay. Test results had revealed that the low potential aromatic content of the reformer feed and high operating severity were the critical causes leading to high bromine number of the C8^+ aromatics feed for the PX unit and the shortened service life of clay. This article also puts forward the corresponding remedial measures. 展开更多
关键词 C8^+ aromatic feedstock bromine number clay catalytic reforming unit
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Identification of key genes responsible for cytokine-induced erythroid and myeloid differentiation and switching of hematopoietic stem cells by RAGE
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作者 Ling Chen Hong Zhang +3 位作者 Ying Shi Kyung L Chin Delia C Tang Griffin P Rodgers 《Cell Research》 SCIE CAS CSCD 2006年第12期923-939,共17页
We utilized a unique culture system to analyze the expression patterns of gene, protein, and cell surface antigen, and the biological process of the related genes in erythroid and myeloid differentiation and switching... We utilized a unique culture system to analyze the expression patterns of gene, protein, and cell surface antigen, and the biological process of the related genes in erythroid and myeloid differentiation and switching of hematopoietic stem cells (HSCs) in response to cytokine alterations. Gene-specific fragments (266) identified from five populations of cytokine-stimulated HSCs were categorized into three groups: (1) expressed specifically in a single cell population; (2) expressed in two cell populations, and (3) expressed in three or more populations. Of 145 defined cDNAs, three (2%) were novel genes. Protein two-dimensional gel electrophoresis and flow cytometry analyses showed overlapped and distinguished protein expression profiles in the cell populations studied. Biological process mapping of mRNAs expressed in erythroid and myeloid lineages indicated that mRNAs shared by both lineages attended 'core processes,' whereas genes specifically expressed in either lineage alone were related to specific processes or cellular maturation. Data from this study support the hypothesis that committed HSCs (El4 or G14) cells can still be redirected to develop into myeloid or erythroid cells when erythropoietin (EPO) is replaced with granulocyte-colony stimulating factor (G-CSF) under erythroid-cultured condition or G-CSF with EPO in myeloid-cultured environment, respectively. Our results suggest that genes or proteins co-expressed in erythroid and myeloid lineages may be essential for the lineage maintenance and switching in hematopoiesis. 展开更多
关键词 lineage switching hematopoietic stem cells erythroid/myeloid differentiation CO-EXPRESSION biological processes cytokines
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Chromatographic Analysis of Chemical Composition of the Genus Rhododendron Plants Growing on the Mountain of Evota (South Yakutia)
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作者 Zaytseva Nataha Vladlmlrovna Pogulyaeva Irina Alexandrovna 《Journal of Chemistry and Chemical Engineering》 2014年第5期516-523,共8页
The data on chemical compounds of three Rododendron species (Rh. adamsii Rehd., Rh. aureum Georgi. and Rh. lapponicum subsp, parvifolium (Adams) T. Yamaz.) from the mountain of Evota top in South Yakutia are shown... The data on chemical compounds of three Rododendron species (Rh. adamsii Rehd., Rh. aureum Georgi. and Rh. lapponicum subsp, parvifolium (Adams) T. Yamaz.) from the mountain of Evota top in South Yakutia are shown. Extracts of these plants was analyzed by method of planar chromatography in thin layers using different specific detectors to exposure of some groups of biologically active matters. During the researches, it was established that polyphenol compounds of different degree of condensment prevail in rhododendron composition; catechines, flavonoids, coumarins, saponins, essential oils, phenol carboxylic acids and arbutin are present too. Due to detected features, all the researched species of rhododendrons are perspective for practical using in food industry and as adaptogenes for maintenance of people health in the conditions of north. 展开更多
关键词 South Yakutia the chemical composition of Rhododendron adaptation to high-altitude conditions planarchromatography.
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Effect of Temperature Variation on the Separation of Sesamin and Sesamolin by Simulated Moving Bed 被引量:1
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作者 Ming-Tsai Llang Ru-Chien Liang +2 位作者 Ling-Ya Wang Hung-En Yen Kuo-Tong Lee 《Journal of Chemistry and Chemical Engineering》 2011年第6期479-486,共8页
In this work, sesamin and sesamolin is separated and purified by SMB (simulated moving bed) chromatography. Purity of sesamin and sesamolin can reach 99.2% and 99.9 %, and they can be recovered by 99.9% and 99.4%, r... In this work, sesamin and sesamolin is separated and purified by SMB (simulated moving bed) chromatography. Purity of sesamin and sesamolin can reach 99.2% and 99.9 %, and they can be recovered by 99.9% and 99.4%, respectively. Concentrations of the extract and raffinate was monitored and periodical change of the concentration was observed on experiment. Effects of non-linear adsorption, dead volume, and temperature on the separation are reviewed by the triangle theory to explain the periodical change of concentration. It is found that dead volume has little effect, and temperature fluctuation significantly affects thc separation by SMB. The temperature seriously affects the robust operation of SMB due to the change of Henry's constant, which will change the selectivity and restrain the productivity. Although the productivity in this study is only 0.0416 g/L-hr, the cost of the stationary phase used in this study is much lower than that of packed in analytical column. By using this stationary phase, the authors are still able to separate the mixture of sesamin and sesmolin. This will economically attract attention for the application of SMB to purify bioactive compounds on developing botanical drugs. 展开更多
关键词 Simulated moving bed SESAMIN SESAMOLIN chromatography.
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The Mulberry Silkworm--A New Source of Bioactive Proteins
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作者 Malgorzata Lochyfiska 《Journal of Agricultural Science and Technology(A)》 2015年第8期639-645,共7页
Beyond the commonly known proteins built silk fibres--fibroin and sericin, there are almost 300 bioactive proteins in the silkworm haemolymph. The aim of this work was to present bioactive compounds obtained from the ... Beyond the commonly known proteins built silk fibres--fibroin and sericin, there are almost 300 bioactive proteins in the silkworm haemolymph. The aim of this work was to present bioactive compounds obtained from the silk fibre and isolated from the body of this insect, which may be used in medical and pharmacological applications. The most important are bioactive proteins. However, the juvenile stages of mulberry silkworm possess other very valuable active substances. 展开更多
关键词 Bombyx mori L. fibroin SERICIN 1-DEOXYNOJIRIMYCIN HAEMOLYMPH silk fibre.
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Effect of a biological activated carbon filter on particle counts
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作者 Su-hua WU Bing-zhi DONG +1 位作者 Tie-jun QIAO Jin-song ZHANG 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2008年第11期1576-1581,共6页
Due to the importance of biological safety in drinking water quality and the disadvantages which exist in traditional methods of detecting typical microorganisms such as Cryptosporidium and Giardia, it is necessary to... Due to the importance of biological safety in drinking water quality and the disadvantages which exist in traditional methods of detecting typical microorganisms such as Cryptosporidium and Giardia, it is necessary to develop an alternative. Particle counts is a qualitative measurement of the amount of dissolved solids in water. The removal rate of particle counts was previously used as an indicator of the effectiveness of a biological activated carbon (BAC) filter in removing Cryptosporidium and Giardia. The particle counts in a BAC filter effluent over one operational period and the effects of BAC filter construction and operational parameters were investigated with a 10 m3/h pilot plant. The results indicated that the maximum particle count in backwash remnant water was as high as 1296 count/ml and it needed about 1.5 h to reduce from the maximum to less than 50 count/ml. During the standard filtration period, particle counts stay constant at less than 50 count/ml for 5 d except when influ- enced by sand filter backwash remnant water. The removal rates of particle counts in the BAC filter are related to characteristics of the carbon. For example, a columned carbon and a sand bed removed 33.3% and 8.5% of particles, respectively, while the particle counts in effluent from a cracked BAC filter was higher than that of the influent. There is no significant difference among particle removal rates with different filtration rates. High post-ozone dosage (>2 mg/L) plays an important role in particle count removal; when the dosage was 3 mg/L, the removal rates by carbon layers and sand beds decreased by 17.5% and increased by 9.5%, respectively, compared with a 2 mg/L dosage. 展开更多
关键词 Biological activated carbon (BAC) filter CRYPTOSPORIDIUM GIARDIA Particle counts TURBIDITY
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