检索结果-南通市图书馆

食品科技 2011年第4期36卷 163-166,169页

作者：陈丽丽程丹赵利刘华苏伟江西科技师范学院生命科学学院南昌330013

对鳗鱼骨胶原蛋白的提取工艺进行了研究。采用乙酸和胃蛋白酶提取胶原蛋白,探讨了提取时间、酶量、乙酸浓度和料液比4个影响因素对胶原蛋白提取率的影响。实验结果表明,鳗鱼骨胶原蛋白最佳提取工艺为,采用1:45的料液比0.5mol/L乙酸作为... 详细信息

对鳗鱼骨胶原蛋白的提取工艺进行了研究。采用乙酸和胃蛋白酶提取胶原蛋白,探讨了提取时间、酶量、乙酸浓度和料液比4个影响因素对胶原蛋白提取率的影响。实验结果表明,鳗鱼骨胶原蛋白最佳提取工艺为,采用1:45的料液比0.5mol/L乙酸作为提取剂,加入2.5%胃蛋白酶,在37℃下反应28h,其提取率最高为80.80%。

关键词：鳗鱼骨胶原蛋白提取

在线全文

学校读者我要写书评

暂无评论

水产品中生物胺的研究进展

水产学报 2006年第2期30卷 272-276页

作者：赵利苏伟刘建涛胡火根戴银根江西科技师范学院生命科学学院江西省水产技术推广站江西省水产技术推广站江西南昌330013 江西南昌330046

Biogenic amines are basic nitrogenous compounds with low-molecule-mass,and occur universally in animals,plants and femented *** amines possess the function of physiology and *** amines are formed by decarboxylation of their precursor amino acids,as a result of the action of either endogenous amino acid decarboxylase activity or by the growth of decarboxylase positive *** content of biogenic amine depended on the characteristic of food and the varieties of microorganisms in it.A lot of proteins existed in aquatic products,and peptides and amino acids were produced in the course of processing and *** biogenic amines were transformed easily by these low-molecule-mass *** varieties and the biosynthetic mechanism of biogenic amines,and the factors affecting the formation of biogenic amines in diferent aquatic product were *** analytical methods for the determining of biogenic amines were introduced,and the control measures preventing the formation of biogenic amines were discussed.

关键词：水产品生物胺生理活性

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

茶多酚对冷藏草鱼片保鲜效果的研究

食品科技 2011年第9期36卷 157-160页

作者：欧阳涛赵利苏伟吴润峰陈丽丽刘华江西科技师范学院生命科学学院南昌330013

为研究茶多酚对冷藏草鱼片的保鲜效果,将鲜活草鱼剖杀和清洗后,沥水3min,分别在0.25%、0.5%、1.0%、1.5%、2.0%的茶多酚溶液中浸泡5min,沥水3min,真空包装后于4℃保存,每5d以感官评分、细菌总数、pH、挥发性盐基氮(TVB-N)作为质量指标,... 详细信息

为研究茶多酚对冷藏草鱼片的保鲜效果,将鲜活草鱼剖杀和清洗后,沥水3min,分别在0.25%、0.5%、1.0%、1.5%、2.0%的茶多酚溶液中浸泡5min,沥水3min,真空包装后于4℃保存,每5d以感官评分、细菌总数、pH、挥发性盐基氮(TVB-N)作为质量指标,测定草鱼在冷藏过程中的品质变化。结果表明:茶多酚处理能够明显抑制细菌生长繁殖,降低TVB-N,减缓感官品质的下降速度。结论:茶多酚对冷藏下的草鱼具有良好的抗菌和抗氧化的作用,能够明显的延缓草鱼的腐败变质。

关键词：茶多酚草鱼冷藏保鲜

Study on Green Residential Space Design

在线全文

学校读者我要写书评

暂无评论

IJLAI Transactions on Science and Engineering

IJLAI Transactions on science and Engineering 2024年第1期2卷 32-37页

作者： Yu Jiang Shenyang normal university No.253 Huanghe North Street Shenyang 110034China

With the ever-changing nature,green ecology has become an international trend of ***,the green ecological design of residential space has become the main melody of people’s *** always implement the concept of ecological and environmental protection in the design process,attach importance to the ecological effect of residential space,carry out reasonable budget and use of environmentally friendly decorative materials,reduce the waste of materials,save money and save resources at the same time,and protect the *** the same time,people began to put their hopes on the residential space design,which made the green residential space design began to *** the bold exploration and practice of designers,the design of green residential space will be endowed with more distinctive characteristics and unique *** from the concept of green design,this paper explores the method of green space design through typical analysis.

关键词： Green Residential space Haze

A self-selecting memory element based on a method of interconnected ovonic threshold switching device

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

science China(Information sciences) 2024年第3期67卷 319-320页

作者： Jinyu WEN Lun WANG jiangxi CHEN Hao TONG Xiangshui MIAO School of Integrated Circuits Huazhong University of Science & Technology Institute of Artificial Intelligence Huazhong University of Science & Technology Hubei Yangtze Memory Laboratories

Currently, the 3-D cross-point structure has been successfully applied in phase change memory(PCM) to achieve scalable and stackable memory arrays [1]. The ovonic threshold switching(OTS) selector consists of a memory element that is used to suppress the parasitic current in the 3-D cross-point arrays due to its highly nonlinear currentvoltage(I-V)characteristics which are significant for largescale memory arrays [2].

关键词：

Real estate appraisal system based on GIS and BP neural network

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 2011年第S3期21卷 626-630页

作者： LIU Xiao-sheng1, DENG Zhe1, WANG Ting-li2 1. School of Architecture and Survey Engineering, jiangxi university of science and technology, Ganzhou 341000, China 2. School of Applied science, jiangxi university of science and technology, Ganzhou 341000, China [a] School of Architecture and Survey Engineering Jiangxi University of Science and Technology Ganzhou 341000 China [b] School of Applied science Jiangxi University of Science and Technology Ganzhou 341000 China

For the inefficiency and inaccuracy of appraisal method of traditional estate appraisal theory, the real estate appraisal system based on GIS and BP neural network was established. The structure of the system was designed which includes appraisal model, trade case, GIS database and query analysis module. With the help of the L-M algorithm in MATLAB software, BP neural network was improved and the trade cases were trained, then the BP neural network which has already been trained was tested. At the same time, the BP neural and GIS were put together to construct the hedonic price estimate model. The C# and ArcGIS9.3 were used to achieve the system in VS2008. City basic geographic data and real estate related information were used as the basic data in practice. The results show that the functions of querying, adding and editing the spatial data and attribute data are achieved and also the efficiency and accuracy of real estate are improved, so that the new method of real estate is provided by the system.

关键词： BP neural network GIS hedonic price real estate appraisal

SOME FRACTAL STRUCTURES IN RAPIDLY SOLIDIFIED Al-Mn ALLOY

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 1992年第3期5卷 203-205页

作者： FAN Chuanguang ZHANG Meng jiangxi university Structure Research Laboratory,university of science and technology of China,Academia Sinica Hefei,ChinaWANG Yuansheng WU Ziqin university of science and technology of China,Hefei,China jiangxi Univ China

The fractal structures formed in rapidly quenched Al_(86)Mn_(14)alloy have been observed on *** fractal dimensions are from 1.46 to *** principal phase examined by TEM and X-ray diffractometer is icosahedral quasicrystalline one with a small amount of Al phase. It is believed that these fractal structures are formed by many aggregated particles during the rapid-quenching process.

关键词： Al-Mn alloy rapid solidification fractal structure fractal dimension

Quantum chemical study on the thermal rearrangements of HNCRCR'CO

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 1996年第2期14卷 105-108页

作者： LI,Yong-Hong HONG,San-GuoDepartment of Chemistry,jiangxi normal university,Nanchang,jiangxi 330017,China Department of Chemistry Jiangxi Normal University Nanchang Jiangxi 330027 China

MINDO/3 molecular orbital theory has been used to study the thermal rearrangements of HNCRCR'*** results obtained show that the activation energy of this rearrangement depends on the migrating group R and the group R'.

关键词： Thermal rearrangement MINDO/3 MO method transition state intrinsic reaction coordinate (IRC)

Cu_2ZnSnS_4 thin films prepared by sulfurizing different multilayer metal precursors

在线全文

学校读者我要写书评

暂无评论

science China(Technological sciences) 2009年第1期52卷 269-272页

作者： ZHANG Jun & SHAO LeXi School of Physical science and technology, Zhanjiang normal university, Zhanjiang 524048, China School of Physical science and technology Zhanjiang Normal University Zhanjiang 524048 China

Cu2ZnSnS4 (CZTS) thin films were successfully fabricated on glass substrates by sulfurizing Cu-Sn-Zn multilayer precursors, which were deposited by ion beam sputtering and RF magnetron sputtering, respectively. The structural, electrical and optical properties of the prepared films under various processing conditions were investigated in detail. Results showed that the as-deposited CZTS thin films with the precursors by both ion beam sputtering and RF magnetron sputtering have a composition near stoichiometric. The crystallization of the samples, however, has a strong dependence on the atomic percent of constituents of the prepared CZTS films. A single phase stannite-type structure CZTS with a large absorption coefficient of 104/cm in the visible range could be obtained after sulfurization at 520℃ for 2 h. The samples relative to the RF magnetron sputtering showed a low resistivity of 0.073 ?cm and band gap energy of about 1.53 eV. The samples relative to the ion beam sputtering exhibited a resistivity of 0.36 Ωcm and the band gap energy is about 1.51 eV.

关键词： Cu_2ZnSnS_4 solar cell thin film ion beams sputtering RF sputtering