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从词汇史看《大唐三藏取经诗话》的语言年代 被引量:9
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作者 王洪涌 《古汉语研究》 CSSCI 北大核心 2007年第3期57-62,共6页
文章以《汉语大词典》和三部断代语言词典《唐五代语言词典》《宋语言词典》和《元语言词典》为参照,从词汇史的角度分析了《大唐三藏取经诗话》的复音词,认为该书所反映的是晚唐五代时期的语言。
关键词 《大唐三藏经诗话》 语言年代 词汇史
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《〈墨子·大取〉篇释》之“爱”观探析
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作者 王介成 《职大学报》 2020年第6期19-27,共9页
在墨学研究中,《墨经》之重要性已不言而喻。相比于较具系统性与逻辑性之《小取》,《大取》堪称难读,因其讹、脱、衍、倒、借字之情况甚多。诚追溯《大取》之现阶段研究成果,历史上最早可见之释读者实属傅山(1607—1684)。回观台湾研究... 在墨学研究中,《墨经》之重要性已不言而喻。相比于较具系统性与逻辑性之《小取》,《大取》堪称难读,因其讹、脱、衍、倒、借字之情况甚多。诚追溯《大取》之现阶段研究成果,历史上最早可见之释读者实属傅山(1607—1684)。回观台湾研究情况,虽有对《大取》内容及篇名进行研究者(如孙长祥、刘文清),但直接对傅山《〈墨子·大取〉篇释》(以下简称《大取释》)进行研究者迄今未见,此成为本文之研究动机。又因《大取释》一文有版本差异,故本文将先聚焦收入于《傅山全书》之《大取释(社科院手稿与霜红龛集本)》与《大取释──经子解(三)百泉帖(下)》之文句义理上之差异,续而厘清傅山对《大取》之诠释内容,并以“爱”观为核心进行理论重构。最后则是对傅山之诠释予以评价、反思并说明其现代意义。 展开更多
关键词 傅山 《大取》 《墨经》 《墨子》
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《西游记》研究的视点西移及其文化纵深预期 被引量:8
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作者 蔡铁鹰 《晋阳学刊》 CSSCI 北大核心 2008年第1期106-111,共6页
"视点西移"指近20多年来《西游记》研究的目光投向了由"西域"这个概念扭结起来的历史、地理、宗教、民俗等领域。对《大唐三藏取经诗话》的误读,是近百年来《西游记》研究踟蹰不前的根本原因;而纠正误读之后,《西... "视点西移"指近20多年来《西游记》研究的目光投向了由"西域"这个概念扭结起来的历史、地理、宗教、民俗等领域。对《大唐三藏取经诗话》的误读,是近百年来《西游记》研究踟蹰不前的根本原因;而纠正误读之后,《西游记》研究打开了相当多的全新领域,一个复杂丰富,舒展有序而又能够融受现有基础资料的成书演化线路也被初步勾勒出来。对于更具文化纵深的进展,我们有理由期待。 展开更多
关键词 《西游记》 《大唐三藏经诗话》 西域 研究视点 文化纵深
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Comparison of Two Methods for Measuring Flavonoid Content of Fagopyrum megaspartanium Leaves 被引量:3
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作者 凌永霞 黄凯丰 陈庆富 《Agricultural Science & Technology》 CAS 2010年第11期10-12,24,共4页
[Objective] The aim was to study the flavonoid content of Fagopyrum megaspartanium leaves by water bath and ultrasonic extractions.[Method] By using water bath extraction and ultrasonic extraction,the total flavonoid ... [Objective] The aim was to study the flavonoid content of Fagopyrum megaspartanium leaves by water bath and ultrasonic extractions.[Method] By using water bath extraction and ultrasonic extraction,the total flavonoid content in buckwheat leaves was measured with UV spectrophotometer.[Result] The optimum wavelength for determination of the content of flavonoid extracted from buckwheat leaves was 420 nm;the content of total flavonoid extracted by ultrasonic extraction and water bath extraction from buckwheat were 5.26% and 5.40% respectively;and the average total flavonoid content by water bath extraction was significantly higher than that by ultrasonic extraction.[Conclusion] The result is significant for the improvement of flavonoid content measurement of buckwheat. 展开更多
关键词 Fagopyrum megaspartanium Ultrasonic extraction Water bath extraction FLAVONE
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On the Construction of a Cognition-oriented College-English Teaching Model 被引量:1
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作者 杨劲松 邓志勇 《Sino-US English Teaching》 2007年第3期6-10,17,共6页
This paper analyzes the negative influence of traditional English instruction as well as obsession with bilingual teaching, and sets forth a three-step development strategy in line with the cognitive characteristics o... This paper analyzes the negative influence of traditional English instruction as well as obsession with bilingual teaching, and sets forth a three-step development strategy in line with the cognitive characteristics of learners. 展开更多
关键词 Cognition-oriented college English teaching model
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Sampling Strategy Within a Wild Soybean Population Based on Its Genetic Variation Detected by ISSR Markers 被引量:29
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作者 金燕 张文驹 +1 位作者 傅大煦 卢宝荣 《Acta Botanica Sinica》 CSCD 2003年第8期995-1002,共8页
In order to determine an appropriate sampling strategy for the effective conservation of wild soybean (Glycine soja Sieb. et Zucc.) in China, a natural population from Jiangwan Airport in Shanghai was studied for its ... In order to determine an appropriate sampling strategy for the effective conservation of wild soybean (Glycine soja Sieb. et Zucc.) in China, a natural population from Jiangwan Airport in Shanghai was studied for its genetic diversity through the inter-simple sequence repeat (ISSR) marker analysis of a sample set consisting of 100 randomly collected individuals. A relatively large genetic diversity was detected among the samples based on estimation of DNA products amplified from 15 selected ISSR primers, with the similarity coefficient varying from 0.17 to 0.89. The mean expected heterozygosity (He) was 0.171 4 per locus, and Shannon index (1) was 0.271 4. The Principal Coordinate Analysis (PCA) further indicated that genetic diversity of the Jiangwan wild soybean population was not evenly distributed, instead, was presented by a mosaic or clustered distribution pattern. Correlation study between genetic diversity and number of samples demonstrated that genetic diversity increased dramatically with the increase of number of samples within 40 individuals, but the increase became slow and rapidly reached a plateau when more than 40 individuals were included in the analysis. It is concluded that (i) a sample set of approximately 35-45 individuals should be included to represent possibly high genetic diversity when conservation of a wild soybean population ex situ is undertaken; and (ii) collection of wild soybean samples should be spread out as wide as possible within a population, and a certain distance should be kept as intervals among individuals for sampling. 展开更多
关键词 Glycine soja genetic diversity molecular markers population structure sampling strategy
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Enzymatic Aqueous Extraction of Soybean Oil 被引量:1
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作者 钱俊青 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2001年第2期212-216,共5页
The procedure of enzymatic aqueous extraction of soybean oil was assessed when two-step controlled enzymatic hydrolysis was applied. With aqueous extraction of soybean oil-containing protein, the highest yield of oil ... The procedure of enzymatic aqueous extraction of soybean oil was assessed when two-step controlled enzymatic hydrolysis was applied. With aqueous extraction of soybean oil-containing protein, the highest yield of oil was 96.1% at the optimized conditions studied. Soybean oil-containing protein was hydrolyzed and resulted in releasing part of oil. The separated protein that contained 40% oil was enriched due to its adsorption capacity of released oil, the average oil extraction yeild reached 93.5%. Then the high oil content protein was hydrolyzed again to release oil by enzyme, the oil extraction yeild was 80.4%. As a result, high quality of soybean oil was obtained and the content of total oil yield was 74.4%. 展开更多
关键词 soybean oil aqueous extraction enzymatic methods
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Optimization of extraction and determination of emodin from Polygonum cuspidatum Sieb. et Zucc. products by HPLC-DAD 被引量:1
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作者 卢红梅 梁逸曾 +1 位作者 倪网东 满瑞林 《Journal of Central South University of Technology》 EI 2006年第6期658-662,共5页
A uniform experimental design procedure was used to investigate the effects of some operating parameters on the extraction of emodin from Polygonum cuspidatum Sieb. et Zucc. products. Variables tested were volume rati... A uniform experimental design procedure was used to investigate the effects of some operating parameters on the extraction of emodin from Polygonum cuspidatum Sieb. et Zucc. products. Variables tested were volume ratio of material to solvent, size of material, extraction time and temperature and composition of extraction solvent (mixtures of acetone-water). Each variable was tested at seven levels; 7 experiments were performed in random order. Analyses of the extracts were performed by high-performance liquid chromatography with diode array detection(HPLC-DAD). Analytical responses were processed by using a forward regression analysis, in order to find polynomial function describing the relationship between variables and responses. For all the analytes the experimental conditions for providing the highest extraction yield inside the experimental domain considered were found. Finally, a simple, rapid and accurate analytical method was developed for the determination of emodin by high performance liquid chromatography. The separation is achieved within 25 rain on an ODS column using methanol and water as gradient mobiles. Emodin can be quantified by using external standard method detecting at 436 nm. Good linearity is obtained with correlation coefficient exceeding 0.9986 and the detection limit and the quantification limit are 1.53 and 3.23 mg/L respectively. This method shows good reproducibility for the quantification of the emodin with intra-day and inter-day relative standard deviation less than 2.3% and 5.6% respectively. Under optimized extraction conditions, the recovery of the standard is 96.5%. The validated method is successfully applied to quantify the emodin in seven Polygonum cuspidatum sieb. Et zucc. products, which provided an idea for the pre-treatment of determination of active compounds in traditional Chinese medicines. 展开更多
关键词 Polygonum cuspidatum Sieb. et Zucc. EMODIN HPLC-DAD EXTRACTION quantification Uniform design
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Effect of emodin on small intestinal peristalsis of mice and relevant mechanism 被引量:28
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作者 Hong-QuanZhang Cheng-HuaZhou Yu-Qingwu 《World Journal of Gastroenterology》 SCIE CAS CSCD 2005年第20期3147-3150,共4页
AIM: To investigate the effect of emodin on small intestinal peristalsis of mice and to explore its relevant mechanisms.METHODS: The effect of emodin on small intestinal peristalsis of mice was observed by charcoal po... AIM: To investigate the effect of emodin on small intestinal peristalsis of mice and to explore its relevant mechanisms.METHODS: The effect of emodin on small intestinal peristalsis of mice was observed by charcoal powder propelling test of small intestine. The contents of motilin and somatostatin in small intestine of mice were determinated by radioimmunoassay. The electrical potential difference (PD) related to Na+ and glucose transport was measured across the wall of reverted intestinal sacs. Na+-K+-ATPase activity of small intestinal mucosa was measured by spectroscopic analysis.RESULTS: Different dosages of emodin can improve small intestinal peristalsis of mice. Emodin increased the content of motilin, while reduced the content of somatostatin in small intestine of mice significantly. Emodin 0.2, 0.4, 0.8, and 1.6 g/L decreased PD when there was glucose. However, emodin had little effect when glucose was free. The Na+-K+-ATPase activity of small intestinal mucosa of mice in emodin groups was inhibited obviously. CONCLUSION: Emodin can enhance the function of small intestinal peristalsis of mice by mechanisms of promoting secretion of motilin, lowering the content of somatostatin and inhibiting Na+-K+-ATPase activity of small intestinal mucosa. 展开更多
关键词 EMODIN Small intestinal MOTILIN SOMATOSTATIN Na+-K+-ATPase
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Oral immune regulation using colitis extracted proteins for treatment of Crohn's disease: Results of a phase Ⅰ clinical trial 被引量:8
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作者 Eran Israeli Eran Goldin +5 位作者 Oren Shibolet Athalia Klein Nilla Hemed Dean Engelhardt Elazar Rabbani Yaron Ilan 《World Journal of Gastroenterology》 SCIE CAS CSCD 2005年第20期3105-3111,共7页
AIM: To evaluate safety and possible efficacy of induction of oral immune regulation using colitis extracted proteins (CEP) in Crohn's disease (CD) subjects. METHODS: Ten CDs were treated orally with autologous CE... AIM: To evaluate safety and possible efficacy of induction of oral immune regulation using colitis extracted proteins (CEP) in Crohn's disease (CD) subjects. METHODS: Ten CDs were treated orally with autologous CEP thrice weekly for 16 wk. Subjects were monitored for CDAI and IBDQ. Immune modulatory effect was assessed by T-lymphocyte FACS analysis, CEP-specific IFNγ ELISPOT assay and cytokine levels. RESULTS: Induction of oral immune regulation significantly ameliorated disease activity. All (10/10) subjects had clinical response (CDAI≤70) and 7/10 achieved clinical remission (CDAI≤150). Significant increase in mean IBDQ score was noted (134±9 vs 164±12). No treatment-related adverse events were noted. High levels of CEP-specific IFNγ spot forming colonies were detected in five subjects prior to treatment and in all five, a marked decrease was observed. The CD4+/CD8+ lymphocyte ratio and peripheral NKT cell numbers increased significantly, in 7/10 and in 5/10 subjects, respectively. Significant increase in serum IL-10 and IL-4 levels was observed in 7/10 subjects during treatment period. CONCLUSION: Immune regulation via oral administration of CEP is a safe and possibly effective treatment for subjects with moderate CD and may provide means of antigen-specific immune modulation. 展开更多
关键词 Crohn's disease Colitis extracted proteins
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Antioxidative Effect of Fermented Soybeans Extract in Beef Patties with and without n-3 Fatty Acids 被引量:1
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作者 Ana Maria Romero Mirtha Marina Doval Mario Anibal Sturla Maria Alicia Judis 《Journal of Life Sciences》 2010年第4期11-16,共6页
The objectives of the study were: a) to determine the optimal concentration of the extract that should be incorporated in meat products to maintain the lipid oxidative stability, and b) to verify if the extract exe... The objectives of the study were: a) to determine the optimal concentration of the extract that should be incorporated in meat products to maintain the lipid oxidative stability, and b) to verify if the extract exerted antioxidant activity even when these products were enriched with soybean oil (with fatty acids omega 3). To carry out these aims, in the first instance the additive was incorporated into meat patties (elaborated with 80% beef and 20% fat plus 2% salt over total mass) at 0, 0.5, 1, 5 and 10 g/kg, respectively. The lipid oxidation was evaluated by measurement of peroxide value during 15 days at 8 ℃ and the results were expressed as reduction percentage of peroxidation (RP). RP obtained were 55, 49, 73 and 59 respectively. As 5 g/kg was the optimum concentration of antioxidant, this was chosen to add to meat products enriched with soybean oil. In this case the RP obtained was 78%, indicating that the extract decreased lipid oxidation effectively. 展开更多
关键词 Natural antioxidants peroxide value meat quality n-3 PUFAs lipid oxidation.
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^(18)F-fluoro-2-deoxyglucose uptake on PET CT and glucose transporter 1 expression in colorectal adenocarcinoma 被引量:3
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作者 Sung-Chul Lim 《World Journal of Gastroenterology》 SCIE CAS CSCD 2012年第2期168-174,共7页
AIM:To evaluate the correlation between the level of 18 F-fluoro-2-deoxyglucose (18 F-FDG) uptake and glucose transporter 1 (GLUT1) expression in colorectal adenocarcinoma (CRA).METHODS:Forty four patients with resect... AIM:To evaluate the correlation between the level of 18 F-fluoro-2-deoxyglucose (18 F-FDG) uptake and glucose transporter 1 (GLUT1) expression in colorectal adenocarcinoma (CRA).METHODS:Forty four patients with resected CRA and preoperative 18 F-FDG positron emission tomography computed tomography data were investigated in this study.Comparison of maximum standardized uptake value (SUVmax) of the lesion was made with GLUT1 expression by immunohistochemistry and various clinicopathologic factors including tumor volume,invasion depth,gross finding,and lymph node metastasis.RESULTS:SUVmax was 14.45 ± 7.0 in negative GLUT1 expression cases,15.51 ± 5.7 in weak GLUT1 expression cases,and 16.52 ± 6.8 in strong GLUT1 expression cases,and there was no correlation between between GLUT1 expression and SUVmax.SUVmax was significantly correlated with tumor volume (P < 0.001).However,there was no significant differences in SUVmax and GLUT1 expression among other clinicopathologic factors.CONCLUSION:GLUT1 expression does not correlates significantly with 18 F-FDG uptake in CRA.18 F-FDG uptake was increased with tumor volume,which is statistically significant. 展开更多
关键词 18^F-fluoro-2-deoxyglucose Glucose trans-porter 1 Colorectal cancer
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SEMIAUTOMATIC BUILDING EXTRACTION FROM STEREO IMAGE PAIR BASED ON LINES GROUPING AND LEAST SQUARES MATCHING
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作者 ZHANG ZuxunHU XiangyunZHANG Jianqing 《Geo-Spatial Information Science》 2001年第4期49-55,共7页
The paper presents a general paradigm of semiautomatic building extraction from aerial stereo image pair.In the semiautomatic extraction system,the building model is defined by selected roof type through human-machine... The paper presents a general paradigm of semiautomatic building extraction from aerial stereo image pair.In the semiautomatic extraction system,the building model is defined by selected roof type through human-machine interface and input the approximation of area where the extracted building exists.Then under the knowledge of the roof type,low-level and mid-level processing including edge detection,straight line segments extraction and line segments grouping are used to establish the initial geometrical model of the roof-top.However,the initial geometrical model is not so accurate in geometry.To attain accurate results,a general least squares adjustment integrating the linear templates matching model with geometrical constraints in object-space is applied to refine the initial geometrical model.The adjustment model integrating the straight edge pattern and 3D constraints together is a well-studied optimal and anti-noise method.After gaining proper initial values,this adjustment model can flexibly process extraction of kinds of roof types by changing or assembling the geometrical constraints in object-space. 展开更多
关键词 building extraction GROUPING least squares matching object-space
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The Effect of Mixture of Alpinia Galanga, Eurycoma Longifolia Jack and Syzygium Aromaticum Crude Extract on the Growth of Saccharomyces Cerevisiae and Escherichia Coli 被引量:1
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作者 Nur Jasrina Jaafar Kaswandi Md. Ambia +1 位作者 Hing Hiang Lian Rahim Md. Noah 《Journal of Life Sciences》 2014年第5期399-403,共5页
Alpinia galanga, Eurycoma longifolia Jack and Syzygium aromaticum have been widely used in traditional medicine for decades. Antimicrobial activities for individual crude extract were well established. Crude methanoli... Alpinia galanga, Eurycoma longifolia Jack and Syzygium aromaticum have been widely used in traditional medicine for decades. Antimicrobial activities for individual crude extract were well established. Crude methanolic extracts of Alpinia galanga, Eurycoma longifolia Jack and Syzygium aromaticum and the combination for all extracts were tested using well diffusion techniques against Saccharomyces cerevisiae (ATCC 9763) and Escherichia coli (ATCC 25922). The mixed extracts were prepared based on the concentration ratio of 50 μg/μL which are 1:1, 1:1:1 and 1:2:2. Single Syzygium aromaticum extract showed higher inhibition zone on Saccharomyces cerevisiae compared to Escherichia coli. There is reduction in diameter of inhibition zone for single extract and mixture extracts either in combination of two or three extracts tested on Saccharomyces cerevisiae and Escherichia coli growth but they are not significant. In conclusion, Syzygium aromaticum showed highest activity against Saccharomyces cerevisiae and Escherichia coli. Reduction in diameter of inhibition zone indicated that Alpinia galanga and Eurycoma longifolia Jack extracts had antagonistic effect with Syzygium aromaticum. 展开更多
关键词 ANTIFUNGAL ANTIBACTERIAL extract Alpinia galanga Eurycoma longifolia Syzygium aromaticum Saccharomyces cerevisiae and Esherichia coli.
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Genetic study of Kelp “901” strain
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作者 夏鹏 王秀良 +3 位作者 李晓捷 赵玉山 姚琳 段德麟 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2005年第2期152-157,共6页
Based on DNA extraction and optimization of random amplified reaction (RAPD) to the gametophytes and sporophytes of Kelp “901” strain, genetic study on variation was conducted to its parents and offsprings of F6, F7... Based on DNA extraction and optimization of random amplified reaction (RAPD) to the gametophytes and sporophytes of Kelp “901” strain, genetic study on variation was conducted to its parents and offsprings of F6, F7, F8, and F9 generation. RAPD results have shown that among 30 selected primers for gametophytes, 297 loci ranging from 200 to 3 000 bp were obtained in the average of 9.9 loci for each primer. This indicated a high polymorphic rate with RAPD detection. UPGMA (unweighted pair-group method arithmetic average) analysis showed that each male and female gametophyte of a generation could be clustered into one pair separately. The genetic distances of the Kelp 901 generation were 0.321 2–0.476 7, and the maximum was between F7 and F8 (0.476 7). Identity analysis showed that F6 generation was more close to the female parent (0.659 3), and F7 generation was more close to the male parent (0.578 8). To the sporophytes study in 24 selected primers for RAPD amplification, 191 loci ranging from 230-2 800 bp were obtained, in the average to each primer of 8.0 loci. The heterozygosity to six populations were male parent (0.223 9), female parent (0.107 2), F6 (0.216 4), F7 (0.228 6), F8 (0.229 6) and F9 (0.317 2). The nearest genetic distance was 0.083 5 (F8, F9). Total heterozygosity (HT) of F6, F7, F8 and F9 generations was 0.318 6, the average heterozygosity (HS) for F6, F7, F8 and F9 generations was 0.248 0, and deduced coefficient of population differentiation (Gst ) was 22.2%. Six sequence characterized amplified regions (SCAR) were preliminary screened through RAPD analysis. It needed to be verified in detail as they are significant for molecular marker assistance in breeding and selecting Laminaria. 展开更多
关键词 Laminaria “901” strain GAMETOPHYTE SPOROPHYTE RAPD genetics variation
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Antihyperglycemic Effect of Zygophyllum Geslini Aqueous Extract in Streptozotocin-lnduced Diabetic Wistar Rats 被引量:1
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作者 Houria Medjdoub Boufeldja Tabti +3 位作者 Malika Baatouche Leila Baou Souhila Zehhaf Karima Azzeddine 《Journal of Life Sciences》 2012年第6期652-656,共5页
Diabetes mellitus is a major public health concern. Finding a cure for the disease without its side-effects is the objective of modem medicine. The plant is a raw material for these studies. Zygophyllum gemini is a sp... Diabetes mellitus is a major public health concern. Finding a cure for the disease without its side-effects is the objective of modem medicine. The plant is a raw material for these studies. Zygophyllum gemini is a species widely used in Algeria to treat this disease. Our aim is to investigate the antidiabetic activity of aqueous extract and its fractions in induced diabetic Wistar rats by streptozotoein. The three drugs caused a decrease in blood sugar for 14 days. Butanolic fractions (BF) fraction gives significant results on blood glucose after seven days and significant regulating oral glucose tolerance. This preliminary study shows that Z. geslini is endowed with a remarkable antidiabetic activity and that further studies are needed. 展开更多
关键词 Zygophyllum geslini STREPTOZOTOCIN induced-diabetic rats ANTIHYPERGLYCEMIC
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Antihyperuricemic Effect of Ethanol Extract of Snake Fruit (Salacca edulis Reinw.) var. Bongkok on Wistar Male Rat
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作者 Leni Herliani Afrianti Priyatno Elin Yulinah Sukandar +1 位作者 Slamet Ibrahim I Ketut Adnyana 《Journal of Food Science and Engineering》 2012年第5期271-276,共6页
The aim of the study was to investigate antihyperuricemic effect of snake fruit (Salacca edulis Reinw.) var. Bongkok Wistar male rates. Antihyperuricemic investigation on Wistar male rats showed that administration ... The aim of the study was to investigate antihyperuricemic effect of snake fruit (Salacca edulis Reinw.) var. Bongkok Wistar male rates. Antihyperuricemic investigation on Wistar male rats showed that administration of ethanol extract at doses of 200 mg/kg bw decreased serum uric acid level significantly compared to control group at hour 6 and 7 (P 〈 0.05) after inducing with potassium oxonate intraperitoneally simultaneously with uric acid orally. Whereas, administration of ethanol extract at doses of 100 mg/kg bw did not decrease serum uric acid level significantly different compared to control group at hour 6 and 7 (P 〈 0.05). Determination of uric acid level in urine, administration of ethanol extract at a dose of 200 mg/kg bw, or probenecid as a standard drug, at a dose of 45 mg/kg bw increased excretion of urine uric acid level significantly different compared to control group in day of 7 (P 〈 0.05) after inducing with potassium oxonate intraperitoneally simultaneously with uric acid orally. However, increase of uric acid excretion by ethanol extract was lower compared to that of probenecid at a dose of 45 mg/kg bw. Mechanism of action of the ethanol extract as an antihyperuricemia has been proposed by inhibition of xanthine oxidase and finally decreased the synthesis of uric acid and increased the excretion of urine uric acid level. 展开更多
关键词 Snake fruit var. Bongkok ethanol extract antihyperuricemic PROBENECID Wistar male rat.
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Portulaca oleracea Leaf Aqueous Lyophilized Extract Reduces Hyperglycemia and Improves Antioxidant Status of Red Blood Cells and Liver in Streptozotocin-lnduced Diabetic Wistar Rats
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作者 Guenzet Akila Krouf Djamil Berzou Sadia 《Journal of Pharmacy and Pharmacology》 2017年第3期139-148,共10页
The aim of this study was to investigate the antihyperglycemic and antioxidant effects of Po (Portulaca oleracea) lyophilised aqueous extract in diabetic male Wistar rats. Diabetes was induced intraperitonially by a... The aim of this study was to investigate the antihyperglycemic and antioxidant effects of Po (Portulaca oleracea) lyophilised aqueous extract in diabetic male Wistar rats. Diabetes was induced intraperitonially by a single injection of STZ (streptozotocin) (60 mg/kg bw (body weight)). Twenty diabetic rats, weighing 263 ± 5 g, were divided into two groups fed a casein diet supplemented or not with Po extract (1 g/kg bw), for four weeks. Control group (n = 6) received 0.23-0.25 mL of citrate buffer and was fed a standard diet during the experiment. The study was carried out at Oran University, Algeria and the entire experiments lasted from September 2011 to July 2012. Blood was obtained from the abdominal aorta of rats after fasting overnight and standard methods were used for the extraction of spices, determination of glycemia, insulinemia, lipid peroxidation and antioxidant enzymes activities. Portulaca oleracea treated compared to untreated rats, glycemia and HbAIc values were respectively 2.8- and 1.7-fold lower. TBARS (thiobarbituric acid reactive substances) concentrations were reduced in RBC (red blood cells) (-54%) and plasma (-65%). Moreover, in liver and kidney, TBARS values were respectively 1.8- and 2-fold lower. SOD (superoxide dismutase) and GSH-Px (glutathione peroxidase) activities were increased respectively by +38% and +85%, in liver. GSSG-Red (glutathione reductase) activity was 1.9-fold higher in kidney, while CAT (catalase) was improved in kidney (+48%). In RBCs, SOD, GSH-Px, GSSH-Red and CAT activities were increased by 31%, 42%, 56% and +50%, respectively. These data have cast a new light on the actions of Portulaca oleracea and its antioxidant potential benefits in preventing diabetes and its complications. 展开更多
关键词 Portulaca oleracea rats diabetes STREPTOZOTOCIN antioxidative enzymes TBARS.
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Nickel extraction from low grade laterite by agitation leaching at atmospheric pressure 被引量:3
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作者 Fatahi Mohammadreza Noaparast Mohammad Shafaei Seyyed Ziaeddin 《International Journal of Mining Science and Technology》 SCIE EI 2014年第4期543-548,共6页
This research work deals with the extraction of nickel from a low grade nickel laterite ore, taken from a deposit located in southwestern of Iran, through agitation leaching at atmospheric pressure. The assaying and m... This research work deals with the extraction of nickel from a low grade nickel laterite ore, taken from a deposit located in southwestern of Iran, through agitation leaching at atmospheric pressure. The assaying and mineralogical studies carried out on the nickel laterite sample, showed the 0.88% Ni, and principally consisted of oxide and silicate crystalline phases i.e. dolomite, quartz, magnetite, and goethite. Among numerous factors affecting such process, four major parameters i.e. temperature, agitator speed(r/min), leaching agents and their concentration were considered in a two-level full factorial experimental design. The agitation leach tests showed that the ore could be leached at atmospheric pressure with sulfuric acid while citric acid was almost unpromising. Analysis of variance(ANOVA) using DX7 software was employed to identify effective parameters. Sulfuric acid concentration and temperature were the most effective parameters on Ni extraction. Furthermore, the factorial models for experiment responses were developed. The results showed 83% Ni extraction after 4 h leaching, under optimized conditions i.e.temperature at 95 ℃, acid concentration at 5 N and agitator speed at 1000 r/min. This study revealed that factorial experimental design can be implemented to identify effective parameters on the agitation leaching process of nickel laterite. 展开更多
关键词 Laterite Nickel extraction Agitation leaching Factorial design Sulfuric acid
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Does prey availability affect the foraging effort and breeding success in the Antarctic Shag (Phalacrocorax bransfieldensis)?
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作者 Ricardo CASAUX 《Chinese Birds》 CSCD 2013年第3期240-247,共8页
Information on diet composition, foraging effort and breeding success of the Antarctic Shag (Phalacrocorax bransfieldensis) was obtained at three colonies on the Antarctic Peninsula, dur-ing the 1997/98 breeding seaso... Information on diet composition, foraging effort and breeding success of the Antarctic Shag (Phalacrocorax bransfieldensis) was obtained at three colonies on the Antarctic Peninsula, dur-ing the 1997/98 breeding season. Fish was the most important prey at each of the colonies sampled, followed by octopods and gastropods. Among colonies, there were marked differences in the size of the fish consumed, which was smaller at Py Point. This was mainly due to the larger number of speci-mens of the smallest fish prey species consumed there. Shags from Py Point performed longer forag-ing trips and spent more time per day foraging. Although at the beginning of the study the number of chicks per nest observed at the three colonies was similar, the number surviving to fledge at Py Point was markedly lower. The relative higher foraging effort and lower breeding success observed at Py Point might be related to the differences in the fish consumed between colonies. My results suggest that the decline in the inshore fish populations observed around the South Shetland Islands could be one of the reasons explaining the steady decrease in the number of breeding Antarctic Shags observed at colonies monitored in this archipelago. 展开更多
关键词 Antarctic Shag breeding success foraging effort prey size
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