检索结果-南通市图书馆

Blood neutrophil extracellular traps:a novel target for the assessment of mammary health in transition dairy cows

Journal of Animal Science and Biotechnology 2023年第3期14卷 1068-1079页

作者： Luyi Jiang Huizeng Sun Fengfei Gu Jin He Fengqi Zhao jianxin liu Institute of Dairy Science College of Animal SciencesZhejiang UniversityHangzhouChina Ministry of Education Key Laboratory of Molecular Animal Nutrition Zhejiang UniversityHangzhouChina Institute of Animal Genetics and Reproduction College of Animal SciencesZhejiang UniversityHangzhouChina Department of Animal&Veterinary Sciences University of VermontBurlingtonUSA

Background:Mammary health is important for transition dairy cows and has been well recognized to exert decisive effects on animal ***,the factors influencing mammary health are still *** somatic cell count(DSCC)could reflect the mastitis risk since it is the percentage of neutrophils plus lymphocytes in total somatic cells and could be reflective of mammary health of dairy *** work aimed to investigate the assessment and prognosis of the health of transition cows based on blood neutrophil extracellular traps(NETs).Results:Eighty-four transition Holstein dairy cows were *** serum was sampled in all the animals at week 1 pre-and postpartum,and milk was sampled at week 1 *** on the DSCC in milk at week 1,cows with lower(7.4%±4.07%,n=15)and higher(83.3%±1.21%,n=15)DSCCs were *** DSCC cows had higher levels of red blood cell counts(P<0.05),hemoglobin(P=0.07),and hematocrit(P=0.05),higher concentrations of serum oxidative variables[reactive oxygen species(P<0.05),malondialdehyde(P<0.05),protein carbonyl(P<0.05),and 8-hydroxy-2-deoxyguanosine(P=0.07)],higher levels of serum and milk NETs(P<0.05)and blood-milk barrier indicators,including serumβ-casein(P=0.05)and milk immunoglobulin G2(P=0.09),than those of low DSCC *** addition,lower concentrations of serum nutrient metabolites(cholesterol and albumin)(P<0.05)and a lower level of serum deoxyribonuclease I(P=0.09)were observed in high DSCC cows than in low DSCC *** the assessments performed using levels of the three prepartum serum parameters(NETs,deoxyribonuclease I andβ-casein),the area under the curve(0.973)of NETs was the *** addition,the sensitivity(1.00)and specificity(0.93)were observed for the discrimination of these cows using NETs levels with a critical value of 32.2 ng/mL(P<0.05).Conclusions:The formation of NETs in blood in transition dairy cows may damage the integrity of the blood-milk barrier and thereby increase the risk for

关键词： Blood-milk barrier Differential somatic cell count Mastitis risk Neutrophil extracellular traps

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

Nano-sized zinc addition enhanced mammary zinc translocation without altering health status of dairy cows

引用

Animal Nutrition 2021年第4期7卷 1024-1030页

作者： Jie Cai Chao Miao Yi Chen Yunyi Xie jianxin liu Diming Wang Key Laboratory of Molecular Animal Nutrition of Ministry of Agriculture College of Animal SciencesInstitute of Dairy ScienceZhejiang UniversityHangzhou 310058China

This study aimed to evaluate role of nano-sized zinc(Zn)on lactation performance,health status,and mammary permeability of lactating dairy *** multiparous dairy cows with similar days in milk(158±43.2)and body weight(694±60.5 kg)were chosen based on parity and milk production and were randomly assigned to 3 treatment groups:basal diet(control,69.6 mg/kg of Zn adequate in Zn requirement),basal diet additional Zn-methionine(Zn-Met,providing 40 mg/kg of Zn),and basal diet additional nano-sized Zn oxide(nZnO,providing 40 mg/kg of Zn).The study lasted for 10 wk,with the first 2 wk as *** intake,milk yield and the related variables,and plasma variables were determined every other *** hematological profiles were determined in the 8 th week of the *** found that feed intake,milk yield,and milk composition were similar across the 3 *** nZnO-and Zn-Met-fed cows had greater milk Zn concentrations in the milk(3.89 mg/L(Zn-Met)and3.93 mg/L(nZnO))and plasma(1.25 mg/L(Zn-Met)and 1.29 mg/L(nZnO))than the control cows(3.79 mg/L in milk and 1.21 mg/L in plasma).The nZnO-fed cows had higher Zn concentrations in plasma but not in milk compared to Zn-Met-fed *** Zn appearance in milk was greater in nZnO-fed(area under curve during the first 4 h post-feeding for milk Zn:16.1 mg/L)and Zn-Met-fed cows(15.7 mg/L)than in control cows(15.0 mg/L).During the first 4 h post-feeding,milk to blood Zn ratio was greater in nZnO-fed animals but lower in Zn-Met-fed cows compared with control *** stress-related variables in plasma,blood hematological profiles,and mammary permeability related variables were not different across *** summary,lactation performance,Zn concentrations in milk and plasma,hematological profiles,mammary permeability were similar in cows fed nZnO and *** therefore suggested that nZnO feeding can improve Zn bioavailability without impairing lactation performance,health status,and mammary gland permeability in d

关键词： Zinc Nano-size Oxidative stress Lactation performance Mammary gland permeability

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

四百八十七份玉米地方种质资源穗部性状的表型多样性

引用

浙江农业学报 2024年第7期36卷 1481-1491页

作者：李清超杨珊张登峰刘建新孙开利吴迅毕节市农业科学研究所贵州毕节551700 中国农业科学院作物科学研究所北京100081 贵州省农业科学院旱粮研究所贵州贵阳550000

为研究玉米种质资源穗部性状间的相互关系,筛选鉴定优质玉米资源。以贵州、陕西、甘肃、湖北4个省份收集的487份玉米种质资源为研究材料,采用Shannon-Wiener多样性指数、主成分分析和聚类分析等方法对玉米10个穗部性状进行综合评价。结... 详细信息

为研究玉米种质资源穗部性状间的相互关系,筛选鉴定优质玉米资源。以贵州、陕西、甘肃、湖北4个省份收集的487份玉米种质资源为研究材料,采用Shannon-Wiener多样性指数、主成分分析和聚类分析等方法对玉米10个穗部性状进行综合评价。结果表明,10个穗部性状变异系数为6.1%~71.0%,表型多样性指数为0.319~2.038。相关分析表明,10个穗部性状间存在广泛的相关性;系统聚类分析将487份资源划分为4个类群,类群Ⅰ有187份种质资源,类群Ⅱ有208份种质资源,类群Ⅲ有48份种质资源,类群Ⅳ有44份种质资源,贵州和陕西的玉米种质资源代表性更强。最终筛选到15份穗部性状综合表现优异的玉米种质资源,为玉米种质资源鉴定评价、种质材料创新和遗传育种提供了参考和基础材料。

关键词：玉米种质资源穗部性状多样性分析系统聚类

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

Supplementing N-carbamoylglutamate in late gestation increases newborn calf weight by enhanced placental expression of mTOR and angiogenesis factor genes in dairy cows

引用

Animal Nutrition 2021年第4期7卷 981-988页

作者： Fengfei Gu Luyi Jiang Linyu Xie Diming Wang Fengqi Zhao jianxin liu Institute of Dairy Science College of Animal SciencesZhejiang UniversityHangzhou310058China Department of Animal and Veterinary Sciences University of VermontBurlingtonVT 05405USA

The objective of this study was to investigate whether supplementation with N-carbamoylglutamate(NCG)to cows during late gestation alters uteroplacental tissue nutrient transporters,calf metabolism and newborn *** multiparous Chinese Holstein cows were used in a randomized complete block design *** the last 28 d of pregnancy,cows were fed a diet without(CON)or with NCG(20 g/d per cow).The body weight of calves was weighed immediately after *** samples were collected at parturition and used to assess mRNA expression of genes involved in transport of arginine,glucose,fatty acid and angiogenesis factors,as well as the mammalian target of rapamycin(mTOR)*** samples of calves before colostrum consumption were also collected for the detection of plasma parameters,amino acids(AA)and metabolomics *** newborn weight(P=0.02)and plasma Arg concentration of NCG-calves was significantly higher(P=0.05)than that of CON-calves,and the plasma concentrations of urea nitrogen tended to be lower(P=0.10)in the NCG *** mRNA abundance of genes involved in glucose transport(solute carrier family 2 member 3[SLC2 A3],P<0.01),angiogenesis(nitric oxide synthase 3[NOS3],P=0.02),and mTOR pathway(serine/threonine-protein kinase 1[ACT1],P=0.10;euka ryotic translation initiation factor 4 B pseudogene 1[EIF4 BP1],P=0.08;EIF4 EBP2,P=0.04;and E74-like factor 2[ELF2],P=0.03)was upregulated in the placentome of NCG-supplemented *** addition,17 metabolites were significantly different in the placentome of NCG-supplemented cows compared to non-supplemented cows,and these metabolites are mainly involved in arginine and proline metabolism,alanine,aspartate and glutamate metabolism,and citrate *** summary,the increased body weight of newborn calves from the NCG supplemented dairy cows maybe attributed to the increased angiogenesis and uteroplacental nutrient transport and to the activated mTOR signal pathway,which may result in the increa

关键词： N-Carbamoylglutamate Metabolomics Newborn calf weight Nutrient transporter Placentome Transition dairy cows

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

Gut health benefit and application of postbiotics in animal production

引用

Journal of Animal Science and Biotechnology 2022年第4期13卷 999-1010页

作者： Yifan Zhong Shanshan Wang Hanqiu Di Zhaoxi Deng jianxin liu Haifeng Wang College of Animal Science Zhejiang UniversityThe Key Laboratory of Molecular Animal NutritionMinistry of EducationHangzhou 310058China

Gut homeostasis is of importance to host health and imbalance of the gut usually leads to disorders or diseases for both human and *** have been applied in manipulating of gut health,and utilization of postbiotics threads new lights into the host *** with the application of probiotics,the characteristics such as stability and safety of postbiotics make it a potential alternative to *** have reported the beneficial effects of components derived from postbiotics,mainly through the mechanisms including inhibition of pathogens,strengthen gut barrier,and/or regulation of immunity of the *** this review,we summarized the characteristics of postbiotics,main compounds of postbiotics,potential mechanisms in gut health,and their application in animal production.

关键词： Animal production Gut health Postbiotics

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

Two-dimensional regularized inversion of AMT data based on rotation invariant of Central impedance tensor

引用

Earth and Planetary Physics 2018年第5期2卷 430-437页

作者： XiaoZhong Tong jianxin liu AiYong Li Key Laboratory of Metallogenic Prediction of Nonferrous Metals of Ministry of Education Central South University Changsha 410083 China School of Geosciences and Info-physics Central South University Changsha 410083 China Eastern China Bureau of Nonferrous Geological Exploration Nanjing 210007 China

Considering the uncertainty of the electrical axis for two-dimensional audo-magnetotelluric(AMT) data processing, an AMT inversion method with the Central impedance tensor was presented. First, we present a calculation expression of the Central impedance tensor in AMT, which can be considered as the arithmetic mean of TE-polarization mode and TM-polarization mode in the twodimensional geo-electrical model. Second, a least-squares iterative inversion algorithm is established, based on a smoothnessconstrained model, and an improved L-curve method is adopted to determine the best regularization parameters. We then test the above inversion method with synthetic data and field data. The test results show that this two-dimensional AMT inversion scheme for the responses of Central impedance is effective and can reconstruct reasonable two-dimensional subsurface resistivity structures. We conclude that the Central impedance tensor is a useful tool for two-dimensional inversion of AMT data.

关键词： audio-magnetotelluric/AMT impedance tensor rotation invariants two-dimensional geo-electrical model regularized inversion

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

Structure of the Upper Mantle and Transition Zone Beneath the South China Block Imaged by Finite Frequency Tomography

引用

Acta Geologica Sinica(English Edition) 2016年第5期90卷 1637-1652页

作者： SUN Ya liu jianxin TANG Youcai CHEN Jiawei ZHOU Keping CHEN Bo School ofGeosciences andlnfo-Physics Central South University Changsha 410083 China. School of Resources and Safety Engineering Central South University Changsha 410083 China Key Laboratory ofmetallogenicprediction of Non-Ferrous metals Ministry of Education Central South University Changsha 410083 China. State Key Laboratory of Petroleum Resource and Prospecting and Unconventional Natural Gas Institute China University of Petroleum Beij'ing 102249 China. Key Laboratory of CrustalDynamics Institute of Crustal Dynamics CEA Beijing 100085 China

We applied the finite frequency tomography method to S wave data recorded by 350 broadband stations beneath the South China Block（SCB） and its surroundings from earthquakes occurring between July 2007 and July 2010,to better understand upper mantle *** travel-times in the pair of stations with appropriate weighting for each station are used in the *** results are consistent with previous tomography that show a high velocity anomaly beneath the Sichuan basin and a high velocity anomaly in the transition zone beneath the Yangtze ***,the resolution of mantle heterogeneity provides new insight into the tectonic framework of subduction of Burmese lithosphere in the west part of the study region and subduction of oceanic lithosphere in the *** the subduction realm,west of 107°E,a significant fast S-wave anomaly is located on the southeast of Sichuan *** of 107°E,and two narrow and discontinuous fast S-wave anomalies occur at a depth of 400-600 km beneath the middle of the South China block overlain by the pronounced low S-wave anomalies at a depth of 100 and 400 *** the fast anomalies located in the mantle transition zone represent stagnant slabs,their fragmented nature may suggest that they could be produced by different episodes of subduction beneath western Pacific island and the above slow velocity anomaly may associated with the back-arc regions of ongoing *** addition,tomography also reveals an anomalously high S-wave velocity continental root extends eastward to a depth 400 km beneath the eastern Sichuan *** anomaly may be related to eastern extrusion of Indian lithosphere associated with the collision of India and ***,our results also show large slow anomalies beneath the Red River fault region connected to deeper anomalies beneath the South China Fold Belt and South China *** these observations are consistent with the scenario that the South China block has been built by both

关键词： finite frequency tomography South China Block station pairs subduction Paleo-pacific plate

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

Influence of Al^(3+) on Hydrothermally Synthesized Xonotlite Whiskers in CaO-SiO_2-H_2O System

引用

稀有金属材料与工程 2011年第S3期40卷 99-101页

作者： Li Jing, liu Fei, Cao jianxin Guizhou University, Guiyang 550003, China Guizhou Univ Sch Chem & Chem Engn Guiyang 550003 Peoples R China

Influences of Al3+ concentration on hydrothermally synthesized xonotlite whiskers were researched in this paper. The crystal phase composition and morphology of the products were analyzed and characterized using XRD and SEM techniques. The results indicate that Al3+ concentration have great impact on the crystal phase composition and morphology of the xonotlite whiskers in CaO-SiO2-H2O system under the condition of initial CaO/SiO2 mol ratio of 1.0, reactant concentration of 0.05 mol·L-1 , at 225 ℃ for 15 h. The main crystal phase of hydrothermally synthesized products had a phase transition from xonotlite to tobermorite, and the morphology changed from fibrous to tabular with increasing the concentration of Al3+ ion. At last, in order to prepare the pure xonotlite whiskers via hydrothermal synthesis in CaO-SiO2-H2O system, the Al2O3 contents in raw materials should be less than 1%.

关键词： xonotlite whisker Al3+ ion hydrothermal synthesis

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

西南地区玉米地方种质资源遗传多样性分析及综合评价

引用

作物杂志 2024年第4期 24-32页

作者：李清超张登峰李春辉杨珊刘建新吴迅毕节市农业科学研究所贵州毕节551700 中国农业科学院作物科学研究所北京100081 贵州省农业科学院旱粮研究所贵州贵阳550000

为了研究我国西南地区玉米种质资源表型性状间相互关系,鉴定筛选优异种质资源,以785份西南地区玉米种质资源为研究材料,通过隶属函数、Shannon-Wiener多样性指数、灰色关联度分析、主成分分析及聚类分析等方法对13个表型性状进行综合鉴... 详细信息

为了研究我国西南地区玉米种质资源表型性状间相互关系,鉴定筛选优异种质资源,以785份西南地区玉米种质资源为研究材料,通过隶属函数、Shannon-Wiener多样性指数、灰色关联度分析、主成分分析及聚类分析等方法对13个表型性状进行综合鉴定和评价分析。结果表明,13个表型性状变异系数在10.5%~84.0%,遗传多样性指数在1.597~1.999;灰色关联度分析明确了各性状与产量的紧密程度,性状间存在广泛的相关性,遗传变异丰富。785份地方种质资源按照K-means聚类法划分为3个类群,类群Ⅰ包括168份种质资源,类群Ⅱ包括405份,类群Ⅲ包括212份,筛选到15份综合表现优异的地方种质资源。

关键词：玉米地方品种表型性状遗传多样性综合评价

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

Solute redistribution and Rayleigh number in the mushy zone during directional solidification of Inconel 718

引用

China Foundry 2009年第3期6卷 208-213页

作者： Wang Ling Dong jianxin liu Lin Zhang Lei College of Math and Physics Nanjing University of Information Science and TechnologyNanjing 210044China High Temperature Materials Research LaboratoriesUniversity of Science and Technology BeijingBeijing 100083China National Key Laboratory of Solidification TechnologyNorthwestern Polytechnical UniversityXi''an 710072China College of Math and PhysicsNanjing University of Information Science and TechnologyNanjing 210044China

The interdendritic segregation along the mushy zone of directionally solidified superalloy Inconel 718 has been measured by scanning electron microscope (SEM) and energy dispersion analysis spectrometry (EDAX) techniques and the corresponding liquid composition profile was presented. The liquid density and Rayleigh number (Ra) profiles along the mushy zone were calculated as well. It was found that the liquid density difference increased from top to bottom in the mushy zone and there was no density inversion due to the segregation of Nb and Mo. However carbide formation in the freezing range and the preferred angle of the orientated dendrite array could prompt the fluid flow in the mushy zone although there was no liquid density inversion. The largest relative Rayleigh number appeared at 1,326 degrees C for Inconel 718 where the fluid flow most easily occurred.

关键词： superalloy, directional solidification segregation fluid flow

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

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：