检索结果-南通市图书馆

Standardized ileal digestibility of amino acids in soybean meal fed to non-pregnant and pregnant sows

Journal of Animal Science and Biotechnology 2024年第1期15卷 362-373页

作者： Ke Wang Ya Wang Lei Guo Yong Zhuo Lun Hua Lianqiang Che Shengyu Xu ruinan zhang Jian Li Bin Feng Zhengfeng Fang Xuemei Jiang Yan Lin De Wu Institute of Animal Nutrition Key Laboratory for Animal Disease‑Resistance Nutrition of ChinaMinistry of EducationSichuan Agricultural University211 Huimin RoadWenjiang DistrictChengdu 611130SichuanChina

Background Two studies were designed to determine standard ileal crude protein(CP)and amino acid(AA)digestibility of soybean meal(SBM)from different origins fed to non-pregnant and pregnant *** solvent-extracted SBMs from soybeans produced in the USA,Brazil,and China were *** Exp.1,eight different diets were created:a nitrogen(N)-free diet and 7 experimental diets containing SBM from different origins as the only N *** non-pregnant,multiparous sows were arranged in an 8×8 Latin square design(8 periods and 8 diets).In Exp.2,the diet formula was the same as in *** gestating sows(parity 3)were assigned to 4 different diets in a replicated 4×3 Youden square design(three periods and four diets)in mid-gestation and again in late-gestation *** When fed to non-pregnant and late-gestating sows,the standardized ileal digestibility(SID)of CP and most AAs from different SBM were not significantly different(P>0.05).When fed to mid-gestating sows,the SID values for Arg,His,Lys,Phe,Cys,Gly,Ser,and Tyr in SBM 1 were lower than in SBM 4 and 5(P<0.05),whereas SID for Leu from SBM 5 was higher than in SBM 1 and 4(P<0.05).SID values for Ile,Ala,and Asp from SBM 4 were lower than in SBM 1 and 5(P<0.05).Sows had significantly greater SID values for Lys,Ala,and Asp during mid-gestation when compared with late-gestation stages(P<0.05).Mid-gestating sows had greater SID value for Val and lower SID value for Tyr when compared with non-pregnant and late-gestating sows(P<0.01),whereas non-pregnant sows had significantly greater SID value for Met when compared with gestating sows(P<0.01).Conclusions When fed to mid-gestating sows,the SID values for most AAs varied among SBM *** SID values for Lys,Met,Val,Ala,Asp,and Tyr in SBM were affected by sow gestation *** findings provide a cornerstone for accurate SBM use in sow diets.

关键词： Amino acids Sows Soybean meal Standardized ileal digestibility

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

脑小血管病与卒中防治的"异"与"同"

引用

中风与神经疾病杂志 2024年第1期41卷 7-13页

作者：张枘南王伊龙首都医科大学附属北京天坛医院神经病学中心北京脑科学与类脑研究所国家神经疾病医学中心首都医科大学人脑保护高精尖创新中心国家神经系统疾病临床医学研究中心口腔健康北京实验室临床流行病学北京市重点实验室北京 100070

脑小血管病是由各种病因影响脑内小血管而导致一系列复杂且异质性较强的脑血管综合征.脑小血管病的症状多不明显,诊断主要依靠磁共振成像,根据神经影像学表现可分为近期皮质下小梗死、假定血管源性腔隙、假定血管源性脑白质高信号、血... 详细信息

脑小血管病是由各种病因影响脑内小血管而导致一系列复杂且异质性较强的脑血管综合征.脑小血管病的症状多不明显,诊断主要依靠磁共振成像,根据神经影像学表现可分为近期皮质下小梗死、假定血管源性腔隙、假定血管源性脑白质高信号、血管周围间隙、脑微出血、脑皮质表面铁沉积、脑萎缩.目前脑小血管病的致病机制尚不清楚,也缺乏特殊治疗方法,考虑其与脑卒中在危险因素和组织病理学特征等方面存在相似性,故临床可借鉴卒中的防治方法,如降低血压、抗血小板等来进行脑小血管病的治疗,但由于二者存在一定的差异,卒中的治疗对脑小血管病来说并不完全适用,并且还需根据患者个体的情况综合评估.文章对脑小血管病与卒中防治的异同进行了综述.

关键词：脑小血管疾病卒中磁共振成像

来源：博看期刊评论

在线全文

博看期刊

学校读者我要写书评

暂无评论

An elastic-plastic contact model for line contact structures

引用

Science China(Physics,Mechanics & Astronomy) 2018年第5期61卷 36-45页

作者： Haibin Zhu Yingtao Zhao Zhifeng He ruinan zhang Shaopeng Ma School of Aerospace Engineering Beijing Institute of Technology Beijing 100081 China State Key Laboratory of Explosion Seience and technology Beijing Institute of Technology Beijing 100081 China National Engineering Research Centre of Surveying and Mapping Beijing 100039 China

Although numerical simulation tools are now very powerful,the development of analytical models is very important for the prediction of the mechanical behaviour of line contact structures for deeply understanding contact problems and engineering *** the line contact structures widely used in the engineering field,few analytical models are available for predicting the mechanical behaviour when the structures deform plastically,as the classic Hertz’s theory would be ***,the present study proposed an elastic-plastic model for line contact structures based on the understanding of the yield mechanism.A mathematical expression describing the global relationship between load history and contact width evolution of line contact structures was *** proposed model was verified through an actual line contact test and a corresponding numerical *** results confirmed that this model can be used to accurately predict the elastic-plastic mechanical behaviour of a line contact structure.

关键词： line contact elastic-plastic model contact pressure distribution contact width contact strength

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

4株甘蔗固氮菌株活化土壤养分及影响土壤酶活的分析

引用

分子植物育种 2024年第3期22卷 859-870页

作者：谢显秋张瑞楠韦江璐黄毓燕陈炯宇李杨瑞邢永秀广西大学农学院广西甘蔗生物学重点实验室南宁530004 广西农业科学院甘蔗研究所广西甘蔗遗传改良重点实验室南宁530007

将4株固氮菌DX120E(Klebsiella variicola)、CA1(Bacillus mycoides)、WZS021(Streptomyces chartreusi)、CN11(Pseudomonas mosselii)进行单一和组合处理土壤后测定土壤中硝态氮、铵态氮、水解氮、有效磷、无机磷、速效钾、缓效钾及有机酸含量,用隶属函数法分析获得较优组合后回接至两个甘蔗品种(B8,ROC22),测定不同接菌时间后甘蔗土壤碱解氮、有效磷、速效钾含量和过氧化氢酶、碱性磷酸酶、脲酶活性,以探讨接种菌株对甘蔗土壤主要养分及土壤酶的影响。结果显示:(1)不同菌株处理后土壤中硝态氮、铵态氮、水解氮、有效磷、速效钾、缓效钾及有机酸含量均上升,无机磷含量降低;有机酸含量与有效磷含量正相关,与无机磷含量负相关。分析得到3个较优处理DX120E、CN11+DX120E和CA1+DX120E+WZS021。(2)将3个处理及PAL5回接甘蔗后发现,处理后同一时期土壤中的碱解氮、有效磷、速效钾含量普遍上升。处理90 d后,3个土壤酶活性均显著提高。(3)几个固氮菌都不同程度地提高了土壤的养分含量,可能是不同菌株分泌有机酸的作用。菌株组合CA1+DX120E+WZS021对种植甘蔗后土壤的活化作用显著低于其他处理,可能是3个菌株在种植甘蔗的土壤中存在拮抗作用。本研究旨在为改善蔗地质量、助力菌剂开发和化肥减量增效栽培提供理论依据。

关键词：甘蔗固氮菌土壤养分活化作用有机酸

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

基于提升室内热舒适的商场中庭屋顶几何参数计算性改造设计研究

引用

建筑节能（中英文） 2024年第8期52卷 81-87页

作者：许傲张睿南段浩琦李雪顺董宇(指导) 哈尔滨工业大学建筑学院哈尔滨150001 寒地城乡人居环境科学与技术工业和信息化重点实验室哈尔滨150001

在当下全球节能减排大趋势及我国“双碳”政策背景下,建筑设计越来越趋向于注重对环境的合理利用。建筑室内热舒适直接影响人们的活动与健康,也是导致建筑高能耗的主要因素之一。以哈尔滨金安商场为例建立参数化模型,通过CFD与EnergyPlu... 详细信息

在当下全球节能减排大趋势及我国“双碳”政策背景下,建筑设计越来越趋向于注重对环境的合理利用。建筑室内热舒适直接影响人们的活动与健康,也是导致建筑高能耗的主要因素之一。以哈尔滨金安商场为例建立参数化模型,通过CFD与EnergyPlus双平台进行风环境模拟、日照辐射模拟,评估建筑环境的热舒适,再利用机器学习预测与优化算法进行形态优化,总结被动式自然通风下的高大中庭空间屋顶形态热舒适耦合规律。根据优化结果,商场全年营业期热舒适时长可提升1288~1350 h;通过对比优化后的两种屋顶形式热舒适时长,得出凹型屋顶是较优选择。给出两种形态屋顶优化后的参数范围。提出的优化方法可对后续的商场及商业综合体中庭改造设计提供理论依据及方法指导。

关键词：建筑空间形态热舒适性能模拟机器学习

来源：

维普期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Implications of vitamin D for flesh quality of grass carp(Ctenopharyngodon idella):antioxidant ability,nutritional value,sensory quality,and myofiber characteristics

引用

Journal of Animal Science and Biotechnology 2023年第6期14卷 2596-2613页

作者： Yao zhang Chaonan Li Xiaoqiu Zhou Weidan Jiang Pei Wu Yang Liu Hongmei Ren Lu zhang Haifeng Mi Jiayong Tang ruinan zhang Lin Feng Animal Nutrition Institute Sichuan Agricultural UniversityChengdu 611130SichuanChina. Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province Sichuan Agricultural UniversityChengdu 611130China. Key Laboratory for Animal Disease‑Resistant Nutrition of China Ministry of Education Sichuan Agricultural UniversityChengdu 611130China. Healthy Aquaculture Key Laboratory of Sichuan Province Tongwei Co.Ltd.Chengdu 610041SichuanChina.

Background Muscle represents a unique and complex system with many components and comprises the major edible part of *** D is a critical nutrient for animals and is known to enhance calcium absorption and immune *** recent years,dietary vitamin D supplementation in livestock has received increased attention due to biological responses including improving shear force in mammalian ***,the vitamin D acquisition and myofiber development processes in fish differ from those in mammals,and the effect of vitamin D on fish flesh quality is poorly ***,the influence of dietary vitamin D on fillet quality,antioxidant ability,and myofiber development was examined in grass carp(Ctenopharyngodon idella).Methods A total of 540 healthy grass carp,with an initial average body weight of 257.24±0.63 g,were allotted in 6 experimental groups with 3 replicates each,and respectively fed corresponding diets with 15.2,364.3,782.5,1,167.9,1,573.8,and 1,980.1 IU/kg vitamin D for 70 *** Supplementation with 1,167.9 IU/kg vitamin D significantly improved nutritional value and sensory quality of fillets,enhancing crude protein,free amino acid,lipid,and collagen contents;maintaining an ideal pH;and reduc-ing lactate content,shear force,and cooking loss relative to respective values in the control(15.2 IU/kg)*** myofiber diameter and the frequency of myofibers>50μm in diameter increased under supplementation with 782.5–1,167.9 IU/kg vitamin *** of oxidative damage biomarkers decreased,and the expression of antioxi-dant enzymes and nuclear factor erythroid 2-related factor 2 signaling molecules was upregulated in the 1,167.9 IU/kg vitamin D treatment compared to respective values in the control ***,vitamin D supplementation activated cell differentiation by enhancing the expression of myogenic regulatory factors and myocyte enhancer factors compared to that in the control *** addition,supplementation with 1,167.9 IU/kg

关键词： Antioxidant Grass carp Myofiber development Nutritional value Sensory quality Vitamin D

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Comparative effects of enzymatic soybean,fish meal and milk powder in diets on growth performance,immunological parameters,SCFAs production and gut microbiome of weaned piglets

引用

Journal of Animal Science and Biotechnology 2022年第2期13卷 567-577页

作者： Yingjie Li Yang Liu Jiangnan Wu Qiuhong Chen Qiang Zhou Fali Wu ruinan zhang Zhengfeng Fang Yan Lin Shengyu Xu Bin Feng Yong Zhuo De Wu Lianqiang Che Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education Institute of Animal NutritionSichuan Agricultural UniversityNo.211Huimin RoadWenjiang DistrictChengdu 611130SichuanPeople’s Republic of China

Background:The objective of this study was to evaluate the replacement effects of milk powder(MK)and fish meal(FM)by enzymatic soybean(ESB)in diets on growth performance,immunological parameters,SCFAs production and gut microbiome of weaned ***:A total of 128 piglets with initial body weight at 6.95±0.46 kg,were randomly assigned into 4 dietary treatments with 8 replicates per treatment and 4 piglets per replicate for a period of 14 *** were offered isonitrogenous and iso-energetic diets as follows:CON diet with MK and FM as high quality protein sources,ESB plus FM diet with ESB replacing MK,ESB plus MK diet with ESB replacing FM,and ESB diet with ESB replacing both MK and ***:No significant differences were observed in growth performance among all treatments(P>0.05).However,piglets fed ESB plus FM or ESB diet had increased diarrhea index(P<0.01),and lower digestibility of dry matter(DM),gross energy(GE)or crude protein(CP),relative to piglets fed CON diet(P<0.01).Moreover,the inclusion of ESB in diet markedly decreased the plasma concentration of HPT and fecal concentration of butyric acid(BA)(P<0.01).The High-throughput sequencing of 16S rRNA gene V3−V4 region of gut microbiome revealed that the inclusion of ESB in diet increased the alpha diversity,and the linear discriminant analysis effect size(LEfSe)showed that piglets fed with ESB plus FM or ESB diet contained more gut pathogenic bacteria,such as g_Peptococcus,g_Veillonella and g_***:The inclusion of ESB in diet did not markedly affect growth performance of piglets,but the replacement of MK or both MK and FM by ESB increased diarrhea index,which could be associated with lower nutrients digestibility and more gut pathogenic ***,piglets fed diet using ESB to replace FM did not markedly affect gut health-related parameters,indicating the potential for replacing FM with ESB in weaning diet.

关键词： Enzymatic soybean Growth performance Gut microbiome Immunology SCFAs Weaned piglets

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Differential responses of weaned piglets to supplemental porcine or chicken plasma in diets without inclusion of antibiotics and zinc oxide

引用

Animal Nutrition 2021年第4期7卷 1173-1181页

作者： Li Zhe Lunxiang Yang Sen Lin Fangyuan Chen Peng Wang Lourens Heres Yong Zhuo Jiayong Tang Yan Lin Shengyu Xu Xiaoling zhang Xuemei Jiang Lingjie Huang ruinan zhang Lianqiang Che Gang Tian Bin Feng De Wu Zhengfeng Fang Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education Animal Nutrition InstituteSichuan Agricultural University211 Huimin RoadWenjiang DistrictChengdu611130China Sericultural&Agri-Food Research Institute Guangdong Academy of Agricultural Sciences 133 Dongguanzhuang Yiheng RoadGuangzhou510610China Sonac(China)Biology Co. LtdShanghai1668 Xiuyan RoadPudong New AreaShanghai200120China

This study was conducted to investigate the effects of spray-dried porcine plasma protein(SDPP)or spray-dried chicken plasma protein(SDCP)supplementation in diets without the inclusion of antibiotics and zinc oxide(ZnO)on growth performance,fecal score,and fecal microbiota in early-weaned piglets.A total of 192 healthy weaning piglets(Duroc×Landrace×Yorkshire,21 d old)were blocked by BW(6.53±0.60 kg)and randomly assigned to 4 dietary treatments:negative control(NC,basal diet),positive control(PC),basal diet+ZnO at 2 g/kg and antibiotics at 0.8 g/kg,SDPP(containing 5%SDPP),and SDCP(containing 5%SDCP).The experiment lasted 14 *** SDPP group had higher(P<0.05)final BW,average daily gain and average daily feed intake than the NC and SDCP *** percentage of piglets with fecal scores at 2 or≥2 was higher(P<0.05)in the NC and SDCP groups than in the PC group.A decreased(P<0.05)bacterial alpha diversity and Bacteroidetes abundance,but increased(P<0.05)Firmicutes abundance were observed in the PC and SDPP groups when compared to the NC *** relative abundance of Lactobacillus was higher(P<0.05)in the SDPP than in the SDCP group,and that of Streptococcus was higher(P<0.01)in the PC and SDPP groups than in the NC *** PC group also had higher(P<0.01)Faecalibacterium abundance than the NC and SDCP ***,the SDCP group had higher(P<0.05)serum urea nitrogen than those fed other diets,and lower(P<0.10)shortchain fatty acids to branched-chain fatty acids ratio than the PC and SDPP ***,SDPP was a promising animal protein for piglets in increasing feed intake,modifying gut microbiota profile,reducing gut protein fermentation and alleviating diarrhea frequency,thus promoting growth performance,under the conditions with limited in-feed utilization of antibiotics and ZnO.

关键词： Plasma protein Weaned piglet Growth performance Microbial community

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Clinical characteristics and pathogenic analysis of lower respiratory tract infections in advanced lung cancer patients with different treatment modalities

引用

Malignancy Spectrum 2024年第1期1卷 64-69页

作者： ruinan Guo Dan zhang Jingjing Jin Baiyi Liu Xuejuan Li Yan Huang Respiratory and Critical Care Unit 3 North China University of Science and Technology Affiliated HospitalTangshanHebeiChina

Objective:To clarify the clinical characteristics and pathogenic analysis after lower respiratory tract infection in patients with advanced lung cancer under different ***:A retrospective analysis was adopted to collect 94 cases of patients with advanced lung cancer combined with lower respiratory tract infection from January 1,2018 to December 1,***-four cases were male and 20 cases were *** to the different treatments,the patients were divided into 43 cases in the chemotherapy group and 51 cases in the chemoradiotherapy *** pathogenic and serological indexes were compared between the two groups to provide ideas for the application of ***:In the comparison of general clinical data,the chemotherapy group had a shorter hospital stay than the chemoradiotherapy group and a higher body mass index level than the chemoradiotherapy group(p0.05).In the comparison of pathogenicity,the chemotherapy group was more likely to have combined viral infections,while the chemoradiotherapy group was more likely to have Gram-negative bacterial infections(p0.05).Besides,the chemoradiotherapy group was more likely to have combined infections(p>0.05).Conclusion:Patients with advanced lung cancer treated with chemoradiotherapy have a relatively poor prognosis after developing lower respiratory tract infections and are more likely to have mixed *** need to be applied as early as *** common pathogens should be *** and antifungal drugs ca

关键词： chemoradiotherapy chemotherapy advanced lung cancer pathogen

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Erratum to: An elastic-plastic contact model for line contact structures [Sci. China-Phys. Mech. Astron. 61, 054611(2018)]

引用

Science China(Physics,Mechanics & Astronomy) 2018年第8期61卷 108-108页

作者： HaiBin Zhu YingTao Zhao ZhiFeng He ruinan zhang ShaoPeng Ma School of Aerospace Engineering Beijing Institute of Technology State Key Laboratory of Explosion Science and Technology Beijing institute of Technology National Engineering Research Centre of Surveying and Mapping

In the original publication [1] of this paper, eq. (14)

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：