检索结果-南通市图书馆

Journal of Integrative Agriculture 2015年第1期14卷 125-130页

作者： ZHAO Fu-ping guo Gang WANG Ya-chun guo xiang-yu ZHANG yuan DU Li-xin National Center for Molecular Genetics and Breeding of Animal Institute of Animal SciencesChinese Academy of Agricultural Sciences Beijing Sanyuan Dairy Cattle Breeding Center College of Animal Science and Technology China Agricultural University

The objectives of this study were to estimate genetic parameters of lactation average somatic cell scores （LSCS） and examine genetic associations between LSCS and production traits in the first three lactations of Chinese Holstein cows using single-parity multi-trait animal model and multi-trait repeatability animal model. There were totally 273605 lactation records of Chinese Holstein cows with first calving from 2001 to 2012. Heritability estimates for LSCS ranged from 0.144 to 0.187. Genetic correlations between LSCS and 305 days milk, protein percentage and fat percentage were -0.079, -0.082 and -0.135, respectively. Phenotypic correlation between LSCS and 305 days milk yield was negative （-0.103 to -0.190）. Genetic correlation between 305 days milk and fat percentage or protein percentage was highly negative. Genetic correlation between milk fat percentage and milk protein percentage was highly favorable. Heritabilities of production traits decreased with increase of parity, whereas heritability of LSCS increased with increase of parity.

关键词： somatic cell score genetic parameters Chinese Holstein single-parity multi-trait animal model multi-traitrepeatability animal model

农业生产性服务、农业技术进步与农民增收——基于中介效应与面板门槛模型的分析

在线全文

学校读者我要写书评

暂无评论

农业现代化研究 2021年第4期42卷 652-663页

作者：张恒郭翔宇东北农业大学经济管理学院黑龙江哈尔滨150036

探讨农业生产性服务业发展对农民增收的作用机制与约束条件,对农业生产性服务业发展水平提高、农业技术成果转化和农民增收具有重要意义。基于2009—2018年的省级面板数据,运用中介效应模型,对农业生产性服务、农业技术进步和农民收入... 详细信息

探讨农业生产性服务业发展对农民增收的作用机制与约束条件,对农业生产性服务业发展水平提高、农业技术成果转化和农民增收具有重要意义。基于2009—2018年的省级面板数据,运用中介效应模型,对农业生产性服务、农业技术进步和农民收入之间的作用逻辑进行研究,建立以人均经营土地规模为门槛变量的面板门槛模型,探讨农业生产性服务对农民增收的非线性影响。结果表明,农业生产性服务与农业技术进步均正向影响农民收入,对工资性收入的提升效果强于对经营性收入的提升效果。农业技术进步为农业生产性服务与农民增收之间的中介变量,中介效应为4.5%,农业技术进步的中介作用在粮食主销区中最大,远远高于主产区和产销平衡区。通过农业生产性服务实现的技术进步更容易提高农业经营性收入;整体上,农业生产性服务对农民增收的影响表现为非线性,随着人均经营土地规模的扩大,农业生产性服务对农民总收入与工资性收入提升呈现出边际效应递增的规律,而服务对经营性收入的提升不受土地经营规模的影响。尤其在粮食主产区,当人均经营土地规模跨过一定门槛后,更有利于农业生产性服务增收效应的发挥。因此,目前应将农业生产性服务业的发展重点放在粮食主产区与产销平衡区,进一步重视并充分发挥农业生产性服务促进农业科技成果转化为生产力的能力,加强服务的技术支持,尤其是劳动替代性技术的引入,通过土地经营权流转与全程托管等形式的规模经营来缓解人多地少对农业生产性服务充分发挥作用的制约。

关键词：农业生产性服务农业技术进步农民增收粮食产销区中介效应模型面板门槛模型

Use of Traditional Chinese Medicine in Chinese Patients with Coronary Heart Disease

在线全文

学校读者我要写书评

暂无评论

Biomedical and Environmental Sciences 2013年第4期26卷 303-310页

作者： guo xiang yu LIU Jing LIU Jun LI Hong Juan QI yue QIN Lan Ping WANG Miao ZHAO Dong Beijing Anzhen Hospital Capital Medical UniversityBeijing Institute of HeartLung & Blood Vessel Diseases

Objective To study the use of traditional Chinese medicine （TCM） or both TCM and guideline-recommended Western medicine （WM） in Chinese patients with coronary heart disease （CHD）. Methods A cross-sectional nationwide survey of 2803 CHD outpatients was completed by collecting information, including general demographic data, disease history, and use of drugs （including TCM and WM）. Results Of the 2712 CHD outpatients with complete drug treatment data, only 3.1% received TCM without any WM for CHD, 30.0% received both TCM and WM recommended by current CHD guidelines, and 66.9% received only WM. Patients with a longer history of CHD or with a history of stroke, were more likely to use TCM. However, 90.6% of CHD patients who used TCM also used certain WM. Furthermore, patients who used more types of TCM tended to use much less WM recommended by current guidelines. Conclusion A substantial proportion of Chinese CHD outpatients use both TCM and WM for secondary prevention of CHD. It is important to assess the effect of combined TCM and WM on major clinical outcomes in Chinese CHD patients.

关键词： Traditional Chinese medicine Coronary heart disease Guidelines

Influences and Countermeasures of Green Trade Barrier on Export Trade of Chinese Agricultural Products

在线全文

学校读者我要写书评

暂无评论

Journal of Northeast Agricultural University(English Edition) 2005年第2期12卷 186-192页

作者： LI Shuang guo xiang-yu College of Economies and Management Northeast Agricultural University Harbin Heilongjiang 150030 PRC

With the worsening of environment, many countries pay more attention to the environmental protection. Green （organic） trade barrier gradually attracts more attention to the non-tariff barrier in the international trade. However, according to the economic levels of different countries, great differences exist in environment standards of these countries which resulted in the appearance of green trade barriers as trade protection. This study classified the connotations and characteristics of green trade barrier, gave the descriptions on the development and type of green trade barrier, and analysed the influences on China＇s export and put forward some countermeasures which aimed at stimulating the development of our foreign trade.

关键词： green trade barrier agricultural products export trade countermeasures

Tissue distribution of bitespiramycin and spiramycin in rats

在线全文

学校读者我要写书评

暂无评论

Acta Pharmacologica Sinica 2004年第11期 12-17页

作者： xiang-guo SHI, yu-ming SUN, yu-feng ZHANG, Da-fang ZHONG Laboratory of Drug Metabolism and Pharmacokinetics, Shenyang Pharmaceutical University, Shenyang 110016, China

AIM: To investigate the tissue distribution of bitespiramycin (BSPM) and spiramycin (SPM) in rats. METHODS: Liquid chromatographic-mass spectrometric assay was applied for the determination of three major components (isovalerylspiramycins, ISV-SPMs) of BSPM and their major active metabolites (SPMs) in rat tissues and plasma after an oral dose of bitespiramycin, as well as SPMs. RESULTS: High levels of drug concentrations were observed in most tissues, especially in the liver, stomach, intestine, spleen, lung, womb, and pancreas. BSPM persisted long time in many rat tissues such that the drug concentration in spleen was 69.4 nmol/g at 60 h post-dose and it was still above the minimum inhibitory concentration of many susceptible pathogens. At 2.5 h post-dose, the total concentrations of ISV-SPMs and SPMs achieved in tissues were from 6 to 215 times higher than the corresponding concentrations in plasma. At 2.5 h post-dose, the mean Ct/CP of BSPM appeared to be 2- or 3-fold those of SPM in most tissues. The

关键词： bitespiramycin spiramycin pharmacokinetics liquid chromatography mass spectrum analysis

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

含一个非线性项混沌系统的线性控制及反控制

物理学报 2010年第8期59卷 5293-5298页

作者：吴然超郭玉祥安徽大学数学科学学院合肥230039

研究了一类仅含一个非线性项混沌系统的线性控制与反控制,根据Routh-Hurwitz稳定性条件,先对这类混沌系统进行控制,使其达到稳定的状态,然后改变控制系数,使其再次产生混沌,得到一个新的混沌系统,并对这个新的混沌系统的基本动力学行为... 详细信息

研究了一类仅含一个非线性项混沌系统的线性控制与反控制,根据Routh-Hurwitz稳定性条件,先对这类混沌系统进行控制,使其达到稳定的状态,然后改变控制系数,使其再次产生混沌,得到一个新的混沌系统,并对这个新的混沌系统的基本动力学行为进行了分析,数值仿真也验证了新系统的混沌性态.

关键词：混沌系统线性控制分岔 Lyapunov指数

塑料食品接触材料样品前处理与检测技术研究进展

在线全文

学校读者我要写书评

暂无评论

分析测试学报 2021年第11期40卷 1663-1671页

作者：夏禹郭项雨孔玉明马强中国检验检疫科学研究院北京100176 湖北省产品质量监督检验研究院荆州分院湖北荆州434000

塑料食品接触材料是食品接触材料类别中最常见的一种材料,其本身可能含有的潜在化学危害物质在与食品接触过程中发生吸收、溶解、扩散等迁移行为,进而造成食品污染,危害食品质量安全。采用适宜的样品前处理和检测技术对迁移物进行鉴别... 详细信息

塑料食品接触材料是食品接触材料类别中最常见的一种材料,其本身可能含有的潜在化学危害物质在与食品接触过程中发生吸收、溶解、扩散等迁移行为,进而造成食品污染,危害食品质量安全。采用适宜的样品前处理和检测技术对迁移物进行鉴别分析是塑料食品接触材料安全所面临的巨大挑战。该文就塑料食品接触材料的样品前处理技术和仪器分析技术进行了综述,并展望了其发展趋势和应用前景,旨在为从事塑料食品接触材料质量安全研究和检测的技术人员提供技术参考。

关键词：塑料食品接触材料样品前处理检测技术综述

Continuous epidural block of the cervical vertebrae for cervicogenic headache

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2009年第4期122卷 427-430页

作者： HE Ming-wei NI Jia-xiang guo yu-na WANG Qi YANG Li-qiang LIU Jing-jie Department of Pain Xuanwu Hospital Capital Medical UniversityBeijing 100053 China

Background Cervicogenic headache （CEH） is caused by a structural abnormality in the cervical spine. Available treatments for CEH include medical therapy, local botulinum toxin injection, cervical epidural corticosteroid injection, and surgery. The objective of this study was to investigate the safety and efficacy of a continuous epidural block of the cervical vertebra. Methods Medical records were retrospectively analyzed for 37 patients diagnosed with CEH treated by a continuous epidural block of the cervical vertebra with lidocaine, dexamethasone, and saline （5 ml/min） for 3-4 weeks and triamcinolone acetonide 5 mg once weekly for 3-4 weeks. Pain was measured via the visual analogue scale （VAS） in combination with quality of life assessment. Outcome measures were patient-reported days with mild or moderate pain, occurrence of severe pain, and the daily oral dosages of non-steroidal anti-inflammatory drug use （NSAID）. Results In the 3 months immediately preceding placement of the epidural catheter, the mean number of days with mild or moderate pain was 22.0±4.3. The mean occurrence of severe pain was （3.20±0.75） times and the mean oral dosage of NSAID was （1267±325） mg. During the first 6 months after epidural administration of lidocaine and corticosteroids, the mean number of days with mild or moderate pain, the mean occurrence of severe pain, and the mean daily oral dosages of NSAIDs were significantly decreased compared to 3-month period immediately preceding treatment （P 〈0.01）. By 12 months post-treatment, no significant difference in these three outcome measures was noted. Conclusions Continuous epidural block of the cervical vertebra for patients with CEH is effective for at least six months. Further research is needed to elucidate mechanisms of action and to prolong this effect.

关键词： cervicogenic headache epidural block of cervical vertebra aseptic inflammation triamcinolone acetonide

论供销合作社在社会主义新农村建设中的地位与作用

在线全文

学校读者我要写书评

暂无评论

商业研究 2008年第1期 16-18页

作者：郭翔宇东北农业大学经济管理学院黑龙江哈尔滨150030

建设社会主义新农村是我国现代化进程中的重大历史任务。供销合作社问题,实质上是农业、农村和农民问题。因此,深化供销合作社改革,促进供销合作社进一步发展,对于社会主义新农村建设具有重要意义。供销合作社是提高农民组织化程度的有... 详细信息

建设社会主义新农村是我国现代化进程中的重大历史任务。供销合作社问题,实质上是农业、农村和农民问题。因此,深化供销合作社改革,促进供销合作社进一步发展,对于社会主义新农村建设具有重要意义。供销合作社是提高农民组织化程度的有效载体,有利于培养新型的农民;供销合作社是完善农村社会化服务体系的骨干力量,有利于发展发达的农业;供销合作社是农民社员民主管理的经济组织,有利于构建和谐的农村。

关键词：供销合作社新农村建设新型农民发达农业和谐农村

基于多效复方理念的心血管病总体危险防治进展

在线全文

学校读者我要写书评

暂无评论

中华内科杂志 2010年第11期49卷 909-911页

作者：郭翔宇赵冬首都医科大学附属北京安贞医院北京市心肺血管疾病研究所流行病研究室 100029

为了有效防治心血管病的总体危险以及降低病死率，全球范围内不断地研发新的药物治疗模式，其中“多效复方（Polypill）”便是近年的热点之一，现就其与心血管病总体危险防治研究进行讨论。

关键词：心血管病防治复方药物治疗病死率