检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

序批式膜生物反应器处理生活污水的特性

化工学报 2005年第11期56卷 2195-2199页

作者：赵英白晓琴张颖顾平天津大学环境科学与工程学院天津300072

研究了中试规模序批式膜生物反应器处理生活污水的特性.发现其对CODCr、NH3-N及TN的去除效果可分别达到95·0%、96·3%及38·0%;过膜阻力增加率为1·032kPa·***去除率偏低的主要原因在于缺少搅拌装置,在静置阶段时,污泥大部分沉积在反... 详细信息

研究了中试规模序批式膜生物反应器处理生活污水的特性.发现其对CODCr、NH3-N及TN的去除效果可分别达到95·0%、96·3%及38·0%;过膜阻力增加率为1·032kPa·***去除率偏低的主要原因在于缺少搅拌装置,在静置阶段时,污泥大部分沉积在反应器底部(系统运行期间30min沉降比均低于40%),从而使反硝化细菌不能充分与水溶液中的NOx-N接触.采用空间排阻液相色谱法对混合液及膜污染物进行分子量分布测定,发现大量大分子物质在反应器内、膜面及膜孔内积累,相对分子质量大于104的有机物分别占64·0%、38·0%.经过物理及化学清洗,膜通量恢复了73·4%,多糖含量为清洗前的30·4%,说明多糖是造成不可逆污染的主要物质.

关键词：序批式膜生物反应器膜污染分子量分布

Extreme Climatic Characteristics and Their Effects on Maize Yield in Hei-longjiang Province from 1961 to 2020

在线全文

学校读者我要写书评

暂无评论

Journal of Northeast Agricultural University(English Edition) 2023年第3期30卷 44-59页

作者： zhao Chang-shuai Fu Hong-tai Yuan ying-ying Li Xin-li Sun Yan-kun College of Resources and Environmental Sciences Northeast Agricultural UniversityHarbin 150030China Harbin Meteorological Bureau Harbin 150010China

This paper analyzed the extreme climatic characteristics of maize in Heilongjiang Province during different growth periods using the climate data and maize yield data from 1961 to 2020,and applied the principal component analysis to analyze the extent of different extreme climatic events affecting maize *** results showed that the extreme cold events showed a decreasing trend,and the extreme warm events showed an increasing trend,and the trend of extreme precipitation change was not *** yield was negatively correlated with TN10p(cold nights),TX10p(warm days)and T8(days below the lower temperature limit),and positively correlated with TN90p(warm nights).T34(days above the upper temperature limit)and TX90p(warm days)during the tasseling-milking period were negatively correlated with the maize yield,and this part was concentrated in the southern part of Heilongjiang *** maize yield was positively correlated with the extreme precipitation during the seedling period and negatively correlated with the extreme precipitation during the filling-maturity period of maize,but the correlations were not *** effects of extreme weather events on maize yield were higher during the seedling and the filling-maturity periods than those during the jointing-tasseling and the tasseling-milking *** effects of extreme precipitation on the maize yield were less than those of the extreme temperature during different growth periods in all regions,but the effects of the extreme precipitation on maize yield were significantly higher in the Songnen Plain than those in other *** were regional differences in the impact of climate extremes on maize during different growth *** area with the greater impact of climate extremes during the seedling period was the Songnen Plain,the areas with the greater impact of climate extremes during the jointing-tasseling period were the northern part of the Sanjiang Plain,and the areas with the greater i

关键词： extreme temperature extreme precipitation maize yield maize growth period

Curcumin alleviated dextran sulfate sodium-induced colitis by recovering memory Th/Tfh subset balance

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2023年第36期29卷 5226-5239页

作者： Lin-Xin Zheng Kai-En Guo Jia-Qi Huang Miao-Hua Liu Bai-Ling Deng Duan-Yong Liu Bu-Gao Zhou Wen Zhou You-Bao Zhong Hai-mei zhao Department of Postgraduate Jiangxi University of Chinese MedicineNanchang 330004Jiangxi ProvinceChina College of Traditional Chinese Medicine Jiangxi University of Chinese MedicineNanchang 330004Jiangxi ProvinceChina Formula-Pattern Research Center Jiangxi University of Chinese MedicineNanchang 330004Jiangxi ProvinceChina Nanchang Medical College Nanchang 330052Jiangxi ProvinceChina Laboratory Animal Research Center for Science and Technology Jiangxi University of Chinese MedicineNanchang 330004Jiangxi ProvinceChina

BACKGROUND Restoration of immune homeostasis by targeting the balance between memory T helper(mTh)cells and memory follicular T helper(mTfh)cells is a potential therapeutic strategy against ulcerative colitis(UC).Because of its anti-inflammatory and immunomodulatory properties,curcumin(Cur)is a promising drug for UC ***,fewer studies have demonstrated whether Cur can modulate the mTh/mTfh subset balance in mice with *** To explore the potential mechanism underlying Cur-mediated alleviation of colitis induced by dextran sulfate sodium(DSS)in mice by regulating the mTh and mTfh immune *** Balb/c mice were administered 3%and 2%DSS to establish the UC model and treated with Cur(200 mg/kg/d)by gavage on days *** the 18th d,all mice were anesthetized and euthanized,and the colonic length,colonic weight,and colonic weight index were *** changes in the mouse colon were observed through hematoxylin-eosin *** of Th/mTh and Tfh/mTfh cell subsets in the spleen were detected through flow *** blotting was performed to detect SOCS-1,SOCS-3,STAT3,p-STAT3,JAK1,p-JAK1,and NF-κB p65 protein expression levels in colon *** Cur effectively mitigates DSS-induced colitis,facilitates the restoration of mouse weight and colonic length,and diminishes the colonic weight and colonic weight ***,it hinders ulcer development and inflammatory cell infiltration in the colonic mucous *** the percentage of Th1,mTh1,Th7,mTh7,Th17,mTh17,Tfh1,mTfh1,Tfh7,mTfh7,Tfh17,and mTfh17 cells decreased after Cur treatment of the mice for 7 d,and the frequency of mTh10,Th10,mTfh10,and Tfh10 cells in the mouse spleen *** studies revealed that Cur administration prominently decreased the SOCS-1,SOCS-3,STAT3,p-STAT3,JAK1,p-JAK1,and NF-κB p65 protein expression levels in the colon *** Cur regulated the mTh/mTfh cell homeostasis to reduce DSS-induced colonic pat

关键词： Curcumin Ulcerative colitis Memory T helper Memory follicular T helper JAK1/STAT3/SOCS

带有Dzyaloshinski-Mariya相互作用的两比特纠缠量子Otto热机和量子Stirling热机

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

物理学报 2017年第24期66卷 20-28页

作者：赵丽梅张国锋北京航空航天大学物理科学与核能工程学院北京100191

研究了以带有Dzyaloshinski-Mariya(DM)相互作用的两比特自旋体系为工质的量子纠缠Otto热机和量子Stirling热机.两种不同热机在各自的循环过程中,通过保持其他参量不变,只有DM相互作用发生改变,从而分析热机循环中DM相互作用与热传递、... 详细信息

研究了以带有Dzyaloshinski-Mariya(DM)相互作用的两比特自旋体系为工质的量子纠缠Otto热机和量子Stirling热机.两种不同热机在各自的循环过程中,通过保持其他参量不变,只有DM相互作用发生改变,从而分析热机循环中DM相互作用与热传递、做功以及效率等热力学量之间的关系.研究结果表明:DM相互作用对两种热机的基本量子热力学量都具有重要的影响,但量子Stirling热机由于回热器的使用,其循环效率会大于量子Otto纠缠热机的效率,甚至会超过Carnot效率;得到了量子Otto纠缠热机和量子Stirling热机做正功的条件.因此,在这两个纠缠体系中,热力学第二定律都依然成立.

关键词：量子热机 Dzyaloshinski-Mariya相互作用效率

P26 Study Pharmacology to be a Good Physician

在线全文

学校读者我要写书评

暂无评论

中国药理通讯 2006年第2期23卷 31-32页

作者： Bin Zhang Zi-ying Wang Hui-qing Liu Xiu-mei Zhang Institute of Pharmacology School of Medicine Shandong University 44 West Wenhua Road Jinan 250012 China

Construction and application of a high-density cytogenetic map in sesame(Sesamum indicum L.) for genome assembly

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Construction and application of a high-density cytogenetic m...

Five new limonoids isolated from Walsura robusta

中国作物学会油料作物专业委员会第八次会员代表大会暨学术年会

作者： zhao Rui-hong MIAO Hong-mei MA Qin LI Chun WEI Li-bin DUAN ying-hui ZHANG Hai-yang Henan Sesame Research Center Henan Academy of Agricultural Sciences

Sesame is an important oilseed *** order to assemble the fine genome,a BAC library comprising 57 600 BAC clones for sesame was constructed,and the successive double-color fluorescence in situ hybridization(FISH) with bacterial artificial chromosomes(BACs) was *** on the nomination of 13 chromosome pairs in sesame somatic cells,a high-density cytogenetic map carrying 210 specific BACs was constructedfor the first *** 210 BACs were assigned onto 13 chromosome *** order to determine the relative position of BACs in chromosome,position of each BAC marker was calculated with more than triple *** value of each BAC ranged between 0.00 and *** of BAC marker each chromosome varied from 10 to *** results showed that the total size of 210 BAC located onto 51 scaffolds which covered more than 40%of sesame ***,BAC-FISH cytogenetic map was integrated with the super density SNP genetic map and applied to guide fine sesame genome *** cytogenetic map provides a solid foundation for sesame genome assembly and further genomic analysis.

关键词： sesame chromosome BAC-FISH cytogenetic map genome assembly

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Natural Products and Bioprospecting 2023年第1期13卷 657-664页

作者： Li Hou Cui-Xuan mei Chun-Mao Yuan Gui-Hua Tang Duo-Zhi Chen Qing zhao Hong-Ping He Ming-Ming Cao Xiao-Jiang Hao State Key Laboratory of Photochemistry and Plant Resources in West China and Yunnan Key Laboratory of Natural Medicinal ChemistryKunming Institute of BotanyChinese Academy of SciencesKunming 650201China School of Ethnic Medicine and School of Chinese Materia MedicalYunnan University of Chinese MedicineKunming 650500China University of Chinese Academy of Sciences Beijing 100049China Bureau of Commerce and Market Supervision of Management Committee of Hunan Xiangjiang New Area Changsha 410205China The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences Guiyang 550014China Research Unit of Chemical Biology of Natural Anti-Virus Products Chinese Academy of Medical SciencesBeijing 100730China Yunnan Characteristic Plant Extraction Laboratory Kunming 650106China

Five new toosendanin limonoids with highly oxidative furan ring walsurobustones A-D(1-4),and one new furan ring degraded limonoid walsurobustone E(5)together with one known compound toonapubesic acid B(6)were isolated from the leaves of Walsura *** structures were elucidated by NMR and MS ***,the absolute configuration of toonapubesic acid B(6)was confirmed by X-ray diffraction *** 1-6 exhibited good cytotoxicity against the cancer cell lines HL-60,SMMC-7721,A-549,MCF-7,and SW480.

关键词： Limonoids Tetranortriterpenoids Walsura robusta Cytotoxicity

Ginsenoside Rb1 Pretreatment Attenuates Myocardial Ischemia by Reducing Calcium/Calmodulin-Dependent Protein Kinase Ⅱ-Medicated Calcium Release

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Traditional Chinese Medicine 2020年第3期6卷 284-294页

作者： Wen-Jun Zhou Juan-Li Li Qian-mei Zhou Fei-Fei Cai Xiao-Le Chen Yi-Yu Lu Ming zhao Shi-Bing Su Research Center for Traditional Chinese Medicine Complexity System Institute of Interdisciplinary Integrative Medicine ResearchShanghai University of Traditional Chinese MedicineShanghaiChina AntiCancer Inc.San DiegoUSA

Objective:The aim of this study was to investigate the protective effects of ginsenoside Rb1 and assess whether these protective effects are related to calcium/calmodulin-dependent protein kinaseⅡ(Ca MKⅡ).Methods:A myocardial ischemia(IS)*** and a myocardial H9 C2 cell hypoxia model were *** was induced by occluding the left anterior descending artery for 120 *** Rb1(10 mg/kg)was administered 30 min before ischemia induction,and the treatment continued for 7 ***:In the rat IS injury model,ginsenoside Rb1 reduced myocardial infarct size,mean left ventricular diastolic pressure,incidence of arrhythmia,and levels of serum creatine kinase,lactate dehydrogenase,and ***,the mean left ventricular systolic pressure,and maximal rising and falling rates of ventricular pressure(±dp/dtmax)*** the myocardial H9 C2 cell hypoxia model,ginsenoside Rb1 reduced intracellular calcium concentrations([Ca2+]i)during hypoxia,and markedly reversed the hypoxia-induced decrease in cell *** Rb1 was involved in the downregulation of CaMKⅡand the ryanodine receptor,as well as hypoxia-induced H9 C2 cell ***:The findings of the present study suggest that ginsenoside Rb1 attenuates MI injury in rats,partially through the downregulation of CaMKⅡexpression.

关键词： Calcium/calmodulin-dependent protein kinaseⅡ Ginsenoside Rb1 myocardial ischemia ryanodine receptor

PMLSM伺服系统的自适应RBFNN反推控制

在线全文

学校读者我要写书评

暂无评论

电机与控制学报 2020年第4期24卷 149-157页

作者：赵希梅金洋洋王丽梅沈阳工业大学电气工程学院沈阳110870

针对永磁直线同步电动机(PMLSM)伺服系统存在的端部效应、负载扰动及参数变化等不确定性因素,采用一种将反推控制和自适应径向基神经网络(RBFNN)相结合的控制方法。首先,针对电机系统多扰动非线性特性设计一种反推控制方案,利用反推思... 详细信息

针对永磁直线同步电动机(PMLSM)伺服系统存在的端部效应、负载扰动及参数变化等不确定性因素,采用一种将反推控制和自适应径向基神经网络(RBFNN)相结合的控制方法。首先,针对电机系统多扰动非线性特性设计一种反推控制方案,利用反推思想根据期望的运动轨迹来计算跟踪误差,将其作为下一个子系统的控制目标,并利用Lyapunov稳定性理论对每个子系统设计虚拟控制律,保证系统的全局稳定。但在设计中不确定性是未知且难得到的,因此,采用自适应RBFNN在线估计和补偿不确定性,克服不确定性因素对系统性能的影响,提高位置伺服控制的精度,利用Lyapunov函数推导出自适应律以在线调整神经网络的参数。最后,实验结果表明该方案是有效可行的,与反推控制方案相比,基于自适应RBFNN的反推控制系统具有更好的位置跟踪性和抗扰性。

关键词：永磁直线同步电动机不确定性反推控制自适应径向基神经网络位置跟踪抗扰性