检索结果-南通市图书馆

Temperature-Dependent Electron Transport in In0.5Ga0.5 P/GaAs Grown by mOVPE

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2007年第8期24卷 2373-2375页

作者： S. Acar A. Ylldlz m. Kasap m. bosi Department of Physics Faculty of Science and Arts University of Gazi Teknikokular 06500 Ankara Turkey Department of Physics Faculty of Science and Arts University of Ahi Evran Kirsehir Turkey ImEm-CNR Institute Parco area delle Scienze 37/A 43010 Fontanini (Parma) Italy

Hall effect measurements in undoped In0.5Ga0.5 P/GaAs allo grown by metal organic vapour-phase epitaxy （mOVPE） have been carried out in the *** range 15-350K. The experimenta.1 results are analysed using a two-band model including conduction band transport calculated using an iterative solution of the Boltz- mann equation. A good agreement was obtained between theory and experiment. The impurity contents of In0.5Ga0.5 P/GaAs alloy, such as donor density ND, acceptor density NA and donor activation energy εD, were also determined.

关键词： coated conductor buffer layer self-epitaxy CeO2

Electron Transport in Ga-Rich InxGa1-xN Alloys

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

Chinese Physics Letters 2007年第10期24卷 2930-2933页

作者： A. Yildiz S. B. Lisesivdin S. Acar m. Kasap m. bosi Department of Physics Ahi Evran University Kirsehir Turkey Department of Physics Faculty of Science and Arts University of Gazi Teknikokular 06500 Ankara Turkey CNR-ImEm Institute Area delle Scienze 37/A I-43010 Fontanini Parma Italy

Resistivity and Hall effect measurements on n-type undoped Ga-rich InxGa1-xN （0.06 ≤ x ≤ 0.135） alloys grown by metal-organic vapour phase epitaxy （mOVPE） technique are carried out as a function of temperature （15-350 K）. Within the experimental error, the electron concentration in Inx Ga1-x N alloys is independent of temperature while the resistivity decreases as the temperature increases. Therefore, Inx Ga1-xN （0.06 ≤ x ≤0.135） alloys are considered in the metallic phase near the mort transition. It has been shown that the temperaturedependent metallic conductivity can be well explained by the mort model that takes into account electron-electron interactions and weak localization effects.

关键词： coated conductor buffer layer self-epitaxy CeO2

Cuprous Chloride Nanocubes Grown on Copper Foil for Pseudocapacitor Electrodes

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

Nano-micro Letters 2014年第4期6卷 340-346页

作者： bosi Yin Siwen Zhang Xin Zheng Fengyu Qu Xiang Wu Key Laboratory for Photonic and Electronic Bandgap materials Ministry of Education Harbin Normal University

In this paper, for the first time, we report the synthesis of nanoscale cuprous chloride(Cu Cl) cubic structure by a facile hydrothermal route. A possible mechanism for the growth of those nanostructures is proposed based on the experimental results. It is discovered that the existence of HCl could affect the surface of Cu Cl nanocubes. This unique cube-like nanostructure with rough surface significantly enhances the electroactive surface areas of Cu Cl, leading to a high special capacitance of 376 m F cm-2at the current density of 1.0 m A cm-2. There is still a good reversibility with cycling efficiency of 88.8 % after 2,000 cycles, demonstrating its excellent long-term cycling stability and might be the promising candidates as the excellent electrode material.

关键词： Cuprous chloride Nanocubes Electrochemistry Supercapacitor

The effects of starter microbiota and the early life feeding of medium chain triglycerides on the gastric transcriptome profile of 2-or 3-week-old cesarean delivered piglets

在线全文

学校读者我要写书评

暂无评论

Journal of Animal Science and Biotechnology 2018年第1期9卷 196-207页

作者： Paolo Trevisi Davide Priori Vincenzo motta Diana Luise Alfons J.m.Jansman Sietse-Jan Koopmans Paolo bosi DISTAL University of Bologna Viale Fanin 46 40127 Bologna Italy Wageningen University and Research Wageningen The Netherlands

Background： The stomach is an underestimated key interface between the ingesta and the digestive system, affecting the digestion and playing an important role in several endocrine functions. The quality of starter microbiota and the early life feeding of medium chain triglycerides may affect porcine gastric maturation. Two trials（T1, T2） were carried out on 12 and 24 cesarean-delivered piglets（birth, d0）, divided over two microbiota treatments, but slaughtered and sampled at two or three weeks of age, respectively. All piglets were fed orally： sow serum（T1） or pasteurized sow colostrum（T2） on d0; simple starter microbiota（Lactobacillus amylovorus, Clostridium glycolicum and Parabacteroides spp.）（d1-d3）; complex microbiota inoculum（sow diluted feces, CA） or a placebo（simple association, SA）（d3-d4） and milk replacer ad libitum（d0-d4）. The The T1 piglets and half of the T2 piglets were then fed a moist diet（CTRL）; the remaining half of the T2 piglets were fed the CTRL diet fortified with medium chain triglycerides and 7% coconut oil（mCT）. Total m RNA from the oxyntic mucosa was analyzed using Affymetrix？Porcine Gene array strips. Exploratory functional analysis of the resulting values was carried out using Gene Set Enrichment ***： Complex microbiota upregulated 11 gene sets in piglets of each age group vs. SA. Of these sets, 6 were upregulated at both ages, including the set of gene markers of oxyntic mucosa. In comparison with the piglets receiving SA, the CA enriched the genes in the sets related to interferon response when the CTRL diet was given while the same sets were impoverished by CA with the mCT ***： Early colonization with a complex starter microbiota promoted the functional maturation of the oxyntic mucosa in an age-dependent manner. The dietary fatty acid source may have affected the recruitment and the maturation of the immune cells, particularly when the piglets were early associated with a simplified starter microbiota.

关键词： Development microbiota Pig Stomach Transcriptome

maternal antibiotic treatment affects offspring gastric sensing for umami taste and ghrelin regulation in the pig

在线全文

学校读者我要写书评

暂无评论

Journal of Animal Science and Biotechnology 2021年第3期12卷 1031-1041页

作者： P.Trevisi D.Luise F.Correa S.messori m.mazzoni J.P.Lallès P.bosi Department of Agricultural and Food Sciences University of BolognaViale G.Fanin 4640127 BolognaItaly Present Address:World Organisation for Animal Health(OIE) Scientific Secretariat for the STAR-IDAZ International Research Consortium on animal health12 rue de Prony75017 ParisFrance Department of Veterinary Sciences University of BolognaVia Tolara di SopraOzzano nell’Emilia(BO)BolognaItaly INRAE Human Nutrition DivisionSite of Theix63122 Saint-Genès-ChampanelleFrance

Background:Scarce is knowledge on the process regulating the development of acid secretion,orexigenic signaling,and chemosensing in the stomach of young *** of early microbial encounters by suckling pigs can interact with the gut maturation,by the induction of different molecular *** goal was to assess if the age of offspring and the maternal environment,influenced by sow antibiotic treatment peripartum,could affect gastric morphology and the expression of genes involved in the control of hydrochloric secretion,feed intake,taste,and inflammation in offspring ***:84 pigs from sows fed a diet with amoxicillin(on-d10 to+d21 from farrowing,ANT)or without(CON)were sacrificed at d14,d21,d28(weaning)or *** of oxyntic(OXY),pyloric(PY)and cardiac mucosae close to OXY were collected and parietal and enteroendocrine cells(EECs)were *** gene expression of a set of 11 key genes(ATP4A,SSTR2,GAST,GHRL,mBOAT4,PCSK1,GNAT1,TAS1R1,TAS1R3,IL8 and TNF)was assessed by *** addition,40 offspring obtained from the same ANT and CON sows were offered a normal or a fatenriched diet for 4 weeks between 140 and 169 d of age,and then OXY and PY were ***:The number of parietal and EECs increased with age(PmBOAT4 tended to increase during suckling(P=0.062).TAS1R1 increased from suckling to post-weaning period(P=0.001)and was lower in ANT offspring(P=0.013).GNAT1 in PY was higher in ANT offspring(P=0.041).Antibiotic treatment of sows peripartum increased expression of GHRL and mBOAT4 in OXY of growing-finishing offspring aged 5 ***:Data show that sensing for umami taste and ghrelin regulation can be affected by maternal environment,but the development of acid secretion,orexigenic signaling and taste

关键词： Enteroendocrine cell Gastrin Ghrelin Parietal cell Stomach Taste receptor

Bacillus sp. probiotic supplementation diminish the Escherichia coli F4ac infection in susceptible weaned pigs by influencing the intestinal immune response, intestinal microbiota and blood metabolomics

在线全文

学校读者我要写书评

暂无评论

Journal of Animal Science and Biotechnology 2020年第1期11卷 95-110页

作者： Diana Luise micol Bertocchi Vincenzo motta Chiara Salvarani Paolo bosi Andrea Luppi Flaminia Fanelli maurizio mazzoni Ivonne Archetti Giuseppe maiorano Bea K.K.Nielsen Paolo Trevisi Department of Agricultural and Food Sciences University of BolognaViale G.Fanin 4640127 BolognaItaly Department of Agricultural Environmental and Food SciencesUniversity of MoliseVia F.De SanctisCampobassoItaly Istituto Zooprofilattico Sperimentale della Lombardia e dell’Emilia Romagna Bruno Ubertini V.Bianchi 925124 BresciaItaly Endocrinology Unit and Center for Applied Biomedical Research Department of Medical and Surgical SciencesUniversity of Bologna–S.Orsola-Malpighi Hospitalvia Massarenti 940138 BolognaItaly Department of Veterinary medical Sciences University of BolognaVia.Tolara di Sopra 5040064 Ozzano EmiliaItaly Chr.Hansen A/S Boege Allé10-122970 HoersholmDenmark

Background:Probiosis is considered a potential strategy to reduce antibiotics use and prevent postweaning diarrhea(PWD).This study investigated the effect of Bacillus amyloliquefaciens DSm25840 or Bacillus subtilis DSm25841 supplementation on growth,health,immunity,intestinal functionality and microbial profile of post-weaning pigs after enterotoxigenic ***(ETEC)F4 ***:Sixty-four post-weaning piglets(7748 g±643 g)were randomly al ocated to four groups:control basal diet(CO);CO+1.28×10~6 CFU/g of ***(BAA);CO+1.28×10~6 CFU/g feed of ***(BAS);CO+1 g colistin/kg of feed(AB).At day(d)7,animals were chal enged with 10~5 CFU/m L of ETEC F4 ac O149 and then fol owed for fecal score and performance until d *** was col ected at d 6,d 12 and d 21 for immunoglobulins,at d 8 for acute phase proteins,at d 8 and d 21 for metabolomics *** was sampled for morphometry,quantification of apoptosis,cel proliferation,neutral and acid mucine and Ig A secretory cel s,and microarray analysis at d *** and cecum contents were col ected for microbiota at d ***:AB and BAS reduced the fecal score impairment compared to CO(Pmproved BW at d 7,d 14 and d 21,ADWG ADFI and G:F from d 0 to d 7(Pma arginine,lysine,ornithine,glycine,serine and threonine than other groups,and higher haptoglobin than AB(Pmine and Ig A than ***,cel s apoptosis and mucins did not *** and AB increased the vil us mitotic *** profile of BAS and AB were more similar than *** sets related to adaptive immune response were enriched in BAA,BAS and *** had enriched gene set for nuclear structure and RNA *** had a trend of higher Enterobacteriaceae in cecum than the oth

关键词： Bacil us amyloliquefaciens Bacil us subtilis Diarrhea ETEC Gut microbiota Post-weaning Transcriptomics

基于塑料光纤的智能交通移动边缘计算通信系统设计

在线全文

学校读者我要写书评

暂无评论

半导体光电 2019年第6期40卷 886-890页

作者：张鹏王博思国药集团重庆医药设计院有限公司重庆400042 重庆车辆检测研究院有限公司重庆401122 重庆大学自动化学院重庆400044

针对传统智能交通系统(Intelligent Transportation System,ITS)的计算能力和通信能力无法满足其强实时性、高可靠性的需求问题,且边缘计算(Edge Computing,EC)技术是解决强实时性和高可靠性最有效的技术途径,设计研发了一套基于塑料光... 详细信息

针对传统智能交通系统(Intelligent Transportation System,ITS)的计算能力和通信能力无法满足其强实时性、高可靠性的需求问题,且边缘计算(Edge Computing,EC)技术是解决强实时性和高可靠性最有效的技术途径,设计研发了一套基于塑料光纤(Plastic Optical Fiber,POF)的智能交通EC短距离(小于100m)通信系统。该系统采用POF作为主要通信介质,并根据通信系统的需求,设计开发了POF的光纤网络单元(Optical Network Unit,ONU)与各类介质转换器,实现了POF与RS485、100mb/s以太网等标准协议接口相连。系统实现与应用表明:POF比较适用于短距离通信系统,该系统具有传输速率快、带宽高、不受电磁干扰、弯曲半径小、弯曲柔韧性与实时性较好、成本低、可靠性高、现场部署操作方便、不易折断等优势,因而,所设计系统具有较好的参考与应用价值。

关键词：智能交通边缘计算 POF塑料光纤系统设计

海洋菌株mitsuaria ***-50产嗜热性壳聚糖酶CsnSH50的酶学性质表征及其应用

在线全文

学校读者我要写书评

暂无评论

现代食品科技 2023年第1期39卷 50-58页

作者：卢波斯崔丹丹沈宏华南农业大学资源环境学院广东广州510642

实验室从中国海南滨海虾蟹养殖区泥土样品中筛选到一株高产壳聚糖酶的海洋菌株mitsuaria ***-50,优化后该菌株产酶时间仅为12 h,产酶活性可达26.6 U/mL。该研究对其胞外壳聚糖酶进行分离纯化和酶学性质表征并进行壳寡糖制备的小试放大试... 详细信息

实验室从中国海南滨海虾蟹养殖区泥土样品中筛选到一株高产壳聚糖酶的海洋菌株mitsuaria ***-50,优化后该菌株产酶时间仅为12 h,产酶活性可达26.6 U/mL。该研究对其胞外壳聚糖酶进行分离纯化和酶学性质表征并进行壳寡糖制备的小试放大试验,以期进一步明确该菌株在壳寡糖生产上的实际意义。结果表明:壳聚糖酶CsnSH50分子量约为41 ku,纯化后CsnSH50比酶活力为7462.50 U/mg,最适反应pH值为4.5,温度为75℃,在pH值2.5~8.5及温度低于50℃条件下稳定性较好。最适条件下,稀释后CsnSH50的最大反应速率Vmax=29.41 U/mL,米氏常数Km=1.71 mg/mL,1 mmol/L的K^(+)、Ca^(2+)、Cu^(2+)、Fe^(3+)、mn^(2+)对CsnSH50的酶活力有明显正激活效应,10 mmol/L的mn^(2+)对其正激活效应可达412%。TLC和ESI-mS结果表明:CsnSH50水解壳聚糖的最终产物主要为壳二糖、三糖、四糖。小试放大试验结果显示:制备5%(m/V)壳寡糖溶液时,壳聚糖溶液的初始pH值3.5,温度75℃,水解120 min时壳寡糖产率达到92.1%,产物平均聚合度为10.2。综上,CsnSH50具有酶活性高、热稳定性好、耐酸等特性,同时是一种鲜有报道的嗜热性壳聚糖酶,具有良好的工业应用潜力。

关键词：壳聚糖酶 mitsuaria sp.SH-50 分离纯化内切酶

关于分数k-因子临界图与分数k-可扩图的若干结果

在线全文

学校读者我要写书评

暂无评论

运筹学学报 2016年第1期20卷 125-130页

作者：黄晓娴刘岩吴博思华南师范大学数学科学学院广州510631

一个简单图G,如果对于V(G)的任意k元子集S,子图G-S都包含分数完美匹配,那么称G为分数后-因子临界图.如果图G的每个k-匹配m都包含在一个分数完美匹配中,那么称图G为分数k-可扩图.给出一个图是分数k-因子临界图和分数k-可扩图的充分条件,... 详细信息

一个简单图G,如果对于V(G)的任意k元子集S,子图G-S都包含分数完美匹配,那么称G为分数后-因子临界图.如果图G的每个k-匹配m都包含在一个分数完美匹配中,那么称图G为分数k-可扩图.给出一个图是分数k-因子临界图和分数k-可扩图的充分条件,并给出一个图是分数k-因子临界图的充分必要条件.

关键词：分数完美匹配分数k-因子临界的分数k-可扩的分数匹配数