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213篇 您的检索式:作者名="Shad"
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1The interaction among gut microbes,the intestinal barrier and short chain fatty acids显示文摘The mammalian gut is inhabited by a massive and complicated microbial community, in which the hostachieves a stable symbiotic environment through the interdependence, coordination, reciprocal constraintsand participation in an immune response. The interaction between the host gut and themicrobiota is essential for maintaining and achieving the homeostasis of the organism. Consequently, guthomeostasis is pivotal in safeguarding the growth and development and potential productive performanceof the host. As metabolites of microorganisms, short chain fatty acids are not only the preferredenergy metabolic feedstock for host intestinal epithelial cells, but also exert vital effects on antioxidantsand the regulation of intestinal community homeostasis. Herein, we summarize the effects of intestinalmicroorganisms on the host gut and the mechanisms of action of short chain fatty acids on the fourintestinal barriers of the organism, which will shed light on the manipulation of the intestinal communityto achieve precise nutrition for specific individuals and provide a novel perspective for theprevention and treatment of diseases.Jiayu Ma Xiangshu Piao Shad Mahfuz Shenfei Long Jian Wang 2022Animal Nutrition2022,,2:15
2Advances in greenhouse automation and controlled environment agriculture:A transition to plant factories and urban agriculture显示文摘Greenhouse cultivation has evolved from simple covered rows of open-fields crops to highly sophisticated controlled environment agriculture(CEA)facilities that projected the image of plant factories for urban agriculture.The advances and improvements in CEA have promoted the scientific solutions for the efficient production of plants in populated cities and multi-story buildings.Successful deployment of CEA for urban agriculture requires many components and subsystems,as well as the understanding of the external influencing factors that should be systematically considered and integrated.This review is an attempt to highlight some of the most recent advances in greenhouse technology and CEA in order to raise the awareness for technology transfer and adaptation,which is necessary for a successful transition to urban agriculture.This study reviewed several aspects of a high-tech CEA system including improvements in the frame and covering materials,environment perception and data sharing,and advanced microclimate control and energy optimization models.This research highlighted urban agriculture and its derivatives,including vertical farming,rooftop greenhouses and plant factories which are the extensions of CEA and have emerged as a response to the growing population,environmental degradation,and urbanization that are threatening food security.Finally,several opportunities and challenges have been identified in implementing the integrated CEA and vertical farming for urban agriculture.Redmond Ramin Shamshiri Fatemeh Kalantari K.C.Ting Kelly R.Thorp Ibrahim A.Hameed Cornelia Weltzien Desa Ahmad Zahra Mojgan Shad 2018International Journal of Agricultural and Biological Engineering2018,11,1:14
3Investigation of rock salt layer creep and its effects on casing collapse显示文摘Casing collapse is one of the costly incidents in the oil industry. In the oil fields of southwest Iran, most casing collapses have occurred in Gachsaran formation, and the halite rock salt layer in this formation may be the main cause for these incidents because of its peculiar creep behavior. In this research, triaxial creep experiments have been conducted on Gachsaran salt samples under various temperatures and differential stresses. The main purpose was to determine the creep characteristics of Gachsaran rock salt,and to examine the role of creep in several casing collapses that occurred in this formation. Results indicated that the halite rock salt of Gachsaran formation basically obeys the power law;however, its creep parameters are quite different from other halite rocks elsewhere. The time-dependent creep of Gachsaran rock salt exhibits strong sensitivity to temperature change;however, its sensitivity to variation of differential stress is rather low. The numerical simulation of the rock salt creep in a real oil well demonstrated the importance of creep and reservoir conditions on the safety factor of the tubing related to casing collapse.S.Reza Taheri Ali Pak Saeed Shad Behzad Mehrgini Meisam Razifar 2020International Journal of Mining Science and Technology2020,30,3:6
4Phenolic compounds as natural feed additives in poultry and swine diets:a review显示文摘Due to ban on using antibiotics in feed industry,awareness of using natural feed additives have led to a great demand.The interest of plants phenolic compounds as a potential natural antioxidant source has been considered in research community due to their predictable potential role as feed additives in poultry and swine production.However,the mode of action for their functional role and dosage recommendation in animal diets are still remain indistinct.Taking into account,the present review study highlights an outline about the mode of action of phenolic compound and their experimental uses in poultry and swine focusing on the growth performance,antioxidant function,immune function,antimicrobial role and overall health status,justified with the past findings till to date.Finally,the present review study concluded that supplementation of phenolic compounds as natural feed additives may have a role on the antioxidant,immunity,antimicrobial and overall production performance in poultry and swine.Shad Mahfuz Qinghui Shang Xiangshu Piao 2021Journal of Animal Science and Biotechnology2021,12,3:4
5Impact of sugar beet pulp and wheat bran on serum biochemical profile,inflammatory responses and gut microbiota in sows during late gestation and lactation显示文摘Background:Sows are frequently subjected to various stresses during late gestation and lactation,which trigger inflammatory response and metabolic disorders.Dietary fiber can influence animal health by modulating gut microbiota and their by-products,with the effects depending upon the source of the dietary fiber.This study aimed to evaluate the impacts of different fiber sources on body condition,serum biochemical parameters,inflammatory responses and fecal microbiota in sows from late gestation to lactation.Methods:Forty-five multiparous sows(Yorkshire×Landrace;3–6 parity)were assigned to 1 of 3 dietary treatments from d 85 of gestation to the end of lactation(d 21 post-farrowing):a control diet(CON,a corn-soybean meal diet),a sugar beet pulp diet(SBP,20%SBP during gestation and 10%SBP during lactation),and a wheat bran diet(WB,30%WB during gestation and 15%WB during lactation).Results:Compared with CON,supplementation of SBP decreased(P<0.05)lactation BW loss,reduced(P<0.05)serum concentration of total cholesterol,non-esterified fatty acids,interleukin-6 and tumor necrosis factor-α,and increased(P<0.05)fecal water content on d 110 of gestation and d 21 of lactation,while supplementation of WB reduced(P<0.05)serum concentration of total cholesterol on d 110 of gestation,increased(P<0.05)fecal water content and decreased(P<0.05)serum interleukin-6 concentration on d 110 of gestation and d 21 of lactation.In addition,sows fed SBP had lower(P<0.01)abundance of Clostridium_sensu_stricto_1 and Terrisporobacter than those fed CON,but had greater(P<0.05)abundance of Christensenellaceae_R-7_group and Ruminococcaceae_UCG-002 than those fed the other two diets on d 110 of gestation.On d 21 of lactation,supplementation of SBP decreased(P<0.05)the abundance of Firmicutes and Lactobacillus,but enriched(P<0.05)the abundance of Christensenellaceae_R-7_group,Prevotellaceae_NK3B31_group,Ruminococcaceae_UCG-002,Prevotellaceae_UCG_001 and unclassified_f__Lachnospiraceae compared with WB.Compared with CON,sows fed SBP had greater(P<0.05)fecal concentrations of acetate,butyrate and total SCFAs during gestation and lactation,while sows fed WB only had greater(P<0.05)fecal concentration of butyrate during lactation.Conclusions:Supplementation of dietary fiber during late gestation and lactation could improve sow metabolism and gut health,and SBP was more effective than WB.Qinghui Shang Sujie Liu Hansuo Liu Shad Mahfuz Xiangshu Piao 2021Journal of Animal Science and Biotechnology2021,12,4:4
6氮沉降背景下土壤微生物对入侵植物乌桕叶绿素荧光特征的影响显示文摘植物入侵会造成入侵地生态系统功能和稳定性的破坏。与原产地种源相比,入侵种源植物在生理学特性方面有所不同,使其在资源利用和抵抗环境胁迫具有较强的竞争优势。叶绿素荧光特性与植物光合作用效率密切相关,对植物生长具有重要作用。氮沉降加剧是全球变化的一个重要因子,土壤微生物对植物吸收利用土壤养分至关重要。通过施用细菌抑制剂(链霉素)和真菌抑制剂(扑海因)选择性抑制的土壤微生物活性,开展乌桕盆栽实验,在模拟氮沉降背景下,研究不同微生物群落如何影响入侵乌桕叶绿素荧光特性,有助于理解入侵植物的进化特征和入侵机制,为有效防控入侵植物并降低其对生态系统危害提供理论依据。以原产地地和入侵地两个种源乌桕(Triadica sebifera)为研究对象,在氮沉降条件下,通过调控土壤细菌和真菌,探讨两个种源乌桕叶绿素荧光参数差异。结果显示:氮沉降显著增加乌桕相对叶绿素含量(SPAD)、光系统II的最大量子产率(F_(v)/F_(m))、非光化学猝灭(NPQ)和半饱和光强(I_(k))。入侵种源乌桕比原产地具有较低SPAD。氮沉降与细菌抑制剂共同作用显著增强了F_(v)/F_(m)、NPQ和I_(k),显著减弱了光能利用率(α)和SPAD。细菌抑制剂减缓了本地种源乌桕α,真菌抑制剂促进本地种源乌桕I_(k),抑制入侵种源乌桕I_(k),细菌和真菌抑制剂可显著降低原产地乌桕α。氮沉降与生物抑制剂可显著作用于乌桕叶片SPAD。氮沉降、土壤微生物和不同乌桕种源可共同作用于光系统Ⅱ实际光合量子产率Y(Ⅱ),α和潜在最大相对电子传递速率(ETR_(max))。因此,氮沉降与生物抑制剂对乌桕叶绿素荧光特性具有协同作用,入侵种源乌桕对土壤微生物控制的响应不明显,在微生物控制条件下依然具有较强的适应能力,因而具有较强的入侵能力。方海富 冯为迅 罗来聪 高宇 王佰慧 Shad Nasir 魏启轩 邹瑜 苏思思 张令 2021生态学报2021,41,23:4
7小刺猴头菌发酵浸膏多糖体外抗氧化活性分析显示文摘为研究小刺猴头菌[Hericium caput-medusae(Bull.:Fr.)Pers]发酵浸膏多糖的抗氧化活性。以工厂化小刺猴头菌发酵浸膏为原料,采用透析法分级,DEAE sepharose fast flow柱层析纯化,分别获得粗多糖组分HFCP1和中性多糖HFCP1-1;通过PMP柱前衍生-高效液相色谱法和红外光谱法对单糖组成和结构进行分析,单糖组成均以葡萄糖和半乳糖为主。化学法检测多糖抗氧化活性,结果显示:HFCP1和HFCP1-1清除羟基自由基、超氧阴离子自由基、2,2′-联氮-二(3-乙基-苯并噻唑-6-磺酸)二铵盐(2,2′-azinobis-3-ethylbenzthiazoline-6-sulphonate,ABTS+)和1,1-二苯基-2-三硝基苯肼(1,1-diphenyl-2-picrylhydrazyl,DPPH)的IC50值分别为7.66和6.77mg/mL、6.16和5.30mg/mL、0.63和0.85mg/mL、0.39和2.62mg/mL。以RAW264.7细胞建立H2O2诱导损伤模型,细胞抗氧化结果表明:HFCP1和HFCP1-1处理组与模型组相比均显著增强细胞活力(P<0.05),浓度为100和200mg/L时MDA含量与模型组相比均显著下降(P<0.05);HFCP1浓度为100和200mg/L时与模型组相比显著增加SOD和GSH-Px的活性(P<0.05);HFCP1-1浓度为200mg/L时与模型组相比显著增加SOD活性(P<0.05);也能增加GSH-Px的活性,但未达到显著水平(P>0.05)。任桂红 苗月 李肖宏 Mahfuz Shad 甄东 宋慧 2018中国农业大学学报2018,23,12:4
8武功山日本柳杉林与草甸土壤碳氮特征和pH比较显示文摘【目的】通过研究日本柳杉Cryptomeria japonica(L.f.)D.Don造林34年后与其山地草甸土壤碳氮特征和pH的比较,为武功山山地草甸脆弱生态系统恢复建设提供理论依据。【方法】以江西武功山山地草甸为研究对象,选择具有代表性样地,采用五点取样法,采集小区内0~20cm土层的土样,收集草甸地上凋落物,对草甸与日本柳杉林土壤凋落物碳氮指标与pH进行测定。【结果】造林会显著增加土壤全氮、铵态氮、硝态氮、有效态氮、可溶性有机氮、可溶性有机碳、微生物量碳含量、凋落物有机态碳、凋落物全氮(P<0.05),但是却显著降低土壤pH(P<0.05);土壤pH与土壤有机质碳、全氮、铵态氮、硝态氮、有效态氮、可溶性有机氮、可溶性有机碳、微生物量碳含量、凋落物有机态碳、凋落物全氮呈显著负相关(P<0.05)。【结论】日本柳杉造林对土壤微生物活性、土壤质量以及N矿化能力具有积极效应;造林可降低土壤pH值,土壤pH与有机物质分解存在紧密联系。方海富 江亮波 张毅 Nasir Shad 陈煦 张强 马丽丽 贾婷 应钦 张令 2019福建农业学报2019,34,6:3
9Molecular and morphological characterization of the tapeworm Taenia hydatigena (Pallas, 1766) in sheep from Iran显示文摘S. Rostami R. Salavati R.N. Beech Z. Babaei M. Sharbatkhori M.R. Baneshi E. Hajialilo H. Shad M.F. Harandi 2013Journal of Helminthology2013,,2:2
10Internal fixation for osteomyelitis of cervical spine: the issue of persistence of culture positive infection around the implants显示文摘A. Shad S. Shariff J. Fairbank I. Byren P. J. M. A. D. Teddy T. A. D. Cadoux-Hudson 2003Acta Neurochirurgica2003,,:2
11Fault detection in a mixed setting 显示文摘KHOSROWJERDI M J NIKOUKHAH R SAFARI- SHAD N 2005IEEE Transactions on Automatic Control2005,50,:1
12The evolution of the sprawl debate in the United States显示文摘Burchell R W Shad N A 1999West Northwest1999,5,2:1
13Analysis of EF-hand-con- taining proteins in Arabidopsis 显示文摘Day I S Reddy V S Shad G A 2002Genome Biology2002,3,10:1
14Most vital links and nodes in weighted networks显示文摘CORLEY H SHAD 1982Operations Research Letters1982,1,4:1
15A multi-objective PSO for Job-Shop sc heduling problems 显示文摘SHAD Y LIN H H 2009Expert Systems with Applications2009,37,2:1
16Straight sinus steno- sis as a proposed cause of perimesencephalic non - aneurysmal haemor- rhage 显示文摘Shad A Rourke TJ Hamidian Jahromi A 2008J Clin Neurosci2008,15,7:1
17Data Preparation for Mining World Web Browsing Patterns 显示文摘 R Cooley j Srivastava 1999Journal of Knowledge and Information system1999,1,1:1
18Cervical dural arterio- venous fistulae manifesting as subarachnoid hemorrhage: report of two cases and literature review 显示文摘Aviv RI Shad A Tomlinson G 2004Am J Neruora- diol2004,25,5:1
19Anterior correction of cervical kyphotic deformity:effects on myelopathy,neck pain,and sagittal alignment显示文摘Ferch RD Shad A Cadoux-Hudson TA 2004J Neurosurg2004,100,1:1
20The Impact of Alignment Between Virtual Enterprise And Information Technology on Business Performance in an Agile Manufacturing Environment显示文摘Qing Cao Shad D 2005Journal of Operations Management2005,23,5:1
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