检索结果-南通市图书馆

基于一种直接通过型SPE柱快速检测水产饲料中的地西泮

在线全文

学校读者我要写书评

暂无评论

饲料研究 2024年第4期47卷 121-125页

作者：张建雄郑百芹王雪松潘灿平苑中策崔亚楠胡剑唐山市食品药品综合检验检测中心河北唐山063000 中国农业大学北京100091

研究旨在建立一种基于直接通过型固相萃取(SPE)柱结合超高效液相色谱串联质谱的快速、准确测定水产饲料中地西泮的方法。样品经过10 mL乙腈-甲酸水提取、异辛烷除脂后,振荡,离心,将上层清液经直接通过型SPE柱净化,0.22μm滤膜过滤,上机... 详细信息

研究旨在建立一种基于直接通过型固相萃取(SPE)柱结合超高效液相色谱串联质谱的快速、准确测定水产饲料中地西泮的方法。样品经过10 mL乙腈-甲酸水提取、异辛烷除脂后,振荡,离心,将上层清液经直接通过型SPE柱净化,0.22μm滤膜过滤,上机测定。结果显示,地西泮在1.0~10.0μg/L线性范围内线性关系良好,线性系数大于0.99,检测限为0.3μg/kg,定量限为1.0μg/kg。地西泮在空白样品加标的低、中、高3个水平添加量下,回收率在82.6%~101.4%,批内相对标准偏差(RSD)为1.8%~6.2%,批间RSD为3.4%~5.7%。研究表明,该方法省时便捷、节约成本、准确性好,能够满足大规模水产饲料样品的测定。

关键词：地西泮水产饲料快速检测

同方期刊数据库

东弗里生绵羊奶与牛奶和山羊奶生乳品质的比较

在线全文

学校读者我要写书评

暂无评论

中国奶牛 2024年第3期 42-45页

作者：齐彪宋薇郭宇航庞学良苑中策胡剑李艺霍路曼项爱丽唐山市农业综合行政执法支队唐山063000 唐山市食品药品综合检验检测中心唐山063000 农业农村部农产品品质评价与营养健康重点实验室北京100081

本文综述了东弗里生绵羊所产羊奶中固形物、蛋白质等基本物质和不饱和脂肪酸等功能性物质的含量,比较了其与牛奶、山羊奶的营养成分差异,并对东弗里生绵羊奶的前景进行了展望和建议。

关键词：东弗里生绵羊奶山羊奶牛奶蛋白质固形物不饱和脂肪酸

在线全文

学校读者我要写书评

暂无评论

多复变数Bergman空间的支配集

数学学报（中文版） 2022年第1期65卷 25-32页

作者：宋鑫仝策中河北工业大学数学系天津300401

本文利用伪双曲度量球对单位球上的Bergman空间的支配集给出完整刻画.证明方法是将Luecking在单位圆盘上的三个重要引理推广到单位球上,从而刻画单位球上的Bergman空间的支配集.

关键词： Bergman空间支配集对合自同构伪双曲度量

Effect of an Airbag-selective Portal Vein Blood Arrester on the Liver after Hepatectomy:A New Technique for Selective Clamping of the Portal Vein

在线全文

学校读者我要写书评

暂无评论

Current Medical Science 2024年第2期44卷 380-390页

作者： ce-xiong FU Xiao-ri QIN Jin-song CHEN Jie zhong Yu-xu XIE Bi-dan LI Qing-qing FU Fang LI Jin-fang ZHENG Department of Hepatobiliary and Pancreatic Surgery Hainan General HospitalHainan Affiliated Hospital of Hainan Medical UniversityHaikou 570311China University of South China Hengyang 421001China Department of Gastroenterology Gastroenterology Endoscopy CenterHainan General HospitalHainan Affiliated Hospital of Hainan Medical UniversityHaikou 57031lChina center of Clinical Laboratory Hainan General HospitalHainan Affiliated Hospital of Hainan Medical UniversityHaikou 570311China Department of Radiology Hainan General HospitalHainan Affiliated Hospital of Hainan Medical UniversityHaikou 570311China

Objective:A novel technique was explored using an airbag-selective portal vein blood arrester that circumvents the need for an intraoperative assessment of anatomical variations in patients with complex intrahepatic space-occupying ***:Rabbits undergoing hepatectomy were randomly assigned to 4 groups:intermittent portal triad clamping(PTC),intermittent portal vein clamping(PVC),intermittent portal vein blocker with an airbag-selective portal vein blood arrester(APC),and without portal blood occlusion(control).Hepatic ischemia and reperfusion injury were assessed by measuring the 7-day survival rate,blood loss,liver function,hepatic pathology,hepatic inflammatory cytokine infiltration,hepatic malondialdehyde levels,and proliferating cell nuclear antigen ***:Liver damage was substantially reduced in the APC and PVC *** APC animals exhibited transaminase levels similar to or less oxidative stress damage and inflammatory hepatocellular injury compared to those exhibited by the PVC *** was significantly higher in the control group than in the other *** APC group had less bleeding than the PVC group because of the avoidance of portal vein skeletonization during ***,more operative time was saved in the APC group than in the PVC ***,the total 7-day survival rate in the APC group was higher than that in the PTC ***:Airbag-selective portal vein blood arresters may help protect against hepatic ischemia and reperfusion injury in rabbits undergoing partial *** technique may also help prevent liver damage in patients requiring hepatectomy.

关键词： hepatectomy portal vein hepatic damage selective clamping

Multi-omic characterization of genome-wide abnormal DNA methylation reveals diagnostic and prognostic markers for esophageal squamous-cell carcinoma

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

Signal Transduction and Targeted Therapy 2022年第3期7卷 896-908页

作者： Yiyi Xi Yuan Lin Wenjia Guo Xinyu Wang Hengqiang Zhao Chuanwang Miao Weiling Liu Yachen Liu Tianyuan Liu Yingying Luo Wenyi Fan Ai Lin Yamei Chen Yanxia Sun Yulin Ma Xiangjie Niu ce zhong Wen Tan Meng Zhou Jianzhong Su Chen Wu Dongxin Lin Department of Etiology and Carcinogenesis National Cancer Center/National Clinical Research Center/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China Beijing Advanced Innovation center for Genomics Biomedical Pioneering Innovation CenterPeking UniversityBeijing 100871China Cancer Institute Affiliated Cancer Hospital of Xinjiang Medical UniversityUrumqi 830000China School of Biomedical Engineering School of Ophthalmology and Optometry and Eye HospitalWenzhou Medical UniversityWenzhou 325011China Wenzhou Institute University of Chinese Academy of SciencesWenzhou 325000China Jiangsu Collaborative Innovation center for Cancer Personalized Medicine Nanjing Medical UniversityNanjing 211166China CAMS Key Laboratory of Genetics and Genomic Biology Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China Sun Yat-sen University Cancer center State Key Laboratory of Oncology in South ChinaGuangzhou 510060China

This study investigates aberrant DNA methylations as potential diagnosis and prognosis markers for esophageal squamous-cell carcinoma(ESCC),which if diagnosed at advanced stages has<30%five-year survival *** genome-wi... 详细信息

This study investigates aberrant DNA methylations as potential diagnosis and prognosis markers for esophageal squamous-cell carcinoma(ESCC),which if diagnosed at advanced stages hascent normal tissues,we identified 35,577 differentially methylated CpG sites(DMCs)and characterized their distribution patterns.

关键词： esophageal squamous diagnosis

Superior comprehensive properties of LaFe_(11.8)Si_(1.2)/ce_(60)Co_(40) magnetocaloric composites

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

Journal of Rare Earths 2024年第6期42卷 1073-1086,I0003页

作者： Xichun zhong Yuanxin Li Yucai Wu Jiaohong Huang Cuilan Liu Jian Liu zhongwu Liu Minglong zhong Zhenchen zhong R.V.Ramanujan School of Materials Science and Engineering South China University of TechnologyGuangzhou510640China Baotou Research Institute of Rare Earths Baotou014030China center for Advanced Solidification Technology School of Materials Science and EngineeringShanghai UniversityShanghai200444China Jiangxi KeyLaboratory for Rare Earth Magnetic Materials and Devices&Institute for Rare Earth Magnetic Materials and Devices(IREMMD) Jiangxi University of Science and TechnologyGanzhou341000China School of Materials Science and Engineering Nanyang Technological University639798Singapore Singapore-HUJ Alliance for Research and Enterprise(SHARE) The Smart Grippers for Soft Robotics(SGSR)ProgrammeCampus for Research Excellence and Technological Enterprise(CREATE)138602Singapor

LaFe_(11.8)Si_(1.2)/10 wt%ce_(60)Co_(40) composites were prepared by spark plasma sintering and subsequent diffusion annealing.A novel core-shell structure is observed with the LaFe11.8Si1.2 particles as the core and the(La,ce)_(2)(Fe,Co,Si)_(17)(2:17)phase as the *** diffusion annealing time(t_(a))increases,this core-shell structure is replaced by the formation of the(La,ce)_(1)(Fe,Co,Si)_(13) *** at 1323 K for 12 h results in samples with(-ΔSM)^(max) of 9.30 J/(kg·K)(Δμ0H=2 T),good mechanical properties((σbc)^(max)=402 MPa,ε=4.21%)and thermal conductivity of 8.7 W/(m·K).Thus,bulk composites with excellent comprehensive properties for magnetic refrigeration are obtained in this work.

关键词： LaFe_(11.8)Si_(1.2)/ce_(60)Co_(40)composites Spark plasma sintering Diffusion annealing Microstructure evolution Magnetocaloric effect Rareearths

Water–solid contact electrification and catalysis adjusted by surface functional groups

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第4期17卷 3344-3351页

作者： Yusen Su Andy Berbille zhong Lin Wang Wei Tang CAS center for Excellence in Nanoscience Beijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing100083China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing100049China Georgia Institute of Technology AtlantaGA 30332-0245USA

Chemical functional groups on solid surfaces greatly influence contact electrification(ce)at water–solid *** studies of their effects mainly swapped materials or bonded related molecules to a substrate,introducing other factors of *** work aims at unambiguously demonstrating the role of functional groups in water-polymer *** study the contribution of functional groups,by using ion coupled plasma etching to modify a high-density polyethylene(HDPE)film,a polymer with a naturally quasi-null charge transfer ***(HDPE–F)and hydroxyl(HDPE–OH)functional groups are generated and endowed HDPE with charge withdrawing ***–F withdraws 2.5–2.7 times more charges than HDPE–***,the surface charges accumulated generate electrostatic forces,altering the droplets *** phenomenon provides another approach to study ce,helping to evaluate the contribution of electrons to solid–liquid ***,employing HDPE–F to perform contact-electro-catalysis shows its activity is 2.4 times higher than that of commercial fluorinated films.

关键词： contact-electro-catalysis charge transfer solid–liquid interfaces contact electrification

Submerged culture of chromium-enriched Termitomyces albuminosus

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

菌物学报 2008年第1期27卷 118-125页

作者： HUzhong-ce ZHENG Xiao-Dong CHEN Xin-Ai ZHENG Yu-Guo College of Biosystem Engineering and Food Science Zhejiang University Hangzhou 310029 China Institute of Bioengineering Zhejiang University of Technology Hangzhou 310032 China

A species of mushroom, Termitomyces albuminosus, was cultured in liquid medium for production of chromium-enriched mycelium. The influence of chromium (Ⅲ ) on mycelial growth of T. albuminosus was investigated. An optimum medium composed of 5.6g/L yeast extract, 51.6g/L hydrolyzed rice, 2g/L KH2PO4, and 20mg/L chromium(Ⅲ ) with initial pH of 4.5 was obtained by using method of central composite design (CCD). After incubation of 84h, the maximal biomass of chromium-enriched mycelia reached 24.23g DMW(dried mycelial weight)/L with 272μg/g DMW chromium content in 500mL flasks containing 100mL medium with an inoculum of 8% on a shaker of 100r/min under an optimized cultivation condition at 28℃.

关键词：富铬蚁巢伞鸡菌液体培养培养基

Effect of phase transition during roasting of Mountain Pass rare earth concentrate on leaching efficiency of rare earths

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2024年第2期42卷 409-414,I0006页

作者： Yanyan Zhao Xu Sun Deliang Meng Xiangsheng Liu Qiang zhong Zongyu Feng National Engineering Research center for Rare Earth Grirem Advanced Materials Co.Ltd.Beijing0088China Rare Earth Functional Materials(Xiong'an)Innovation center Co. Ltd.Xiongan071700China General Research Institute for Nonferrous Metals Beijing100088China

To find a greener and more economical approach for treating the Mountain Pass rare earth concentrate(MPREC),a novel "Combination Method",including the processes of oxidizing roasting,HCI leaching and sulfuric acid roasting,is proposed in this *** this paper,the effect of phase transition behavior in hydrochloric acid leaching during oxidative roasting at 450-600℃ was *** roasting,the bastnasite in MPREC is decomposed into ceLa_(2)O_(3)F_(3) and(ce_(0.33),La_(0.33),Ca_(0.33))O_(1.5).As the ceLa_(2)O_(3)F_(3) phase has the fluorine-fixation effect,the generated ceLa_(2)O_(3)F_(3) phase can not be dissolved by HCI after roasting at 500 and 550℃,but it can be decomposed by HCI after roasting at over 600℃,resulting in the improvement of the leaching rate of total F *** maximum leaching efficiency of rare earth elements(REEs) can reach 70.32 wt% at the roasting temperature of 550℃.After roasting at over 600℃,some F^-ions in the solution combined with RE^(3+) to form REF_(3) precipitate and enter the leaching residue,and the others are in the form of [ceF_(3)]^+ in the leaching solution during leaching,therefore,the leaching efficiency of non-ce rium REEs decreases while that of cerium element *** work provides basic research for optimizing the actual production process of MPREC.

关键词： Mountain pass rare earth mine Roasting Phase change Rare earths