检索结果-南通市图书馆

Comparative study on in vitro transformation of paralytic shellfish poisoning (PSP) toxins in different shellfish tissues

引用

Acta Oceanologica Sinica 2010年第1期29卷 120-126页

作者： TIAN Hua GAO Chunlei WANG Zongling SUN Ping FAN Shiliang ZHU Mingyuan college of Marine Life Sciences Ocean University of China Qingdao 266063 China First Institute of Oceanography State Oceanic Administration Qingdao 266061 China Key Laboratory of Marine Ecological Environment and Engineering of State OceanicAdministration Qingdao 266061 China

Dissected tissues of three shellfish species, the Chinese scallop, Chlamys farreri, Manila clam, Ruditapes philippinarurn, and Razor shell, Solen strictu were evaluated for in vitro transformation of paralytic shellfish poisoning （PSP） toxins. Tissue homogenates were incubated with extraction from toxic algae Alexandriurn rninutura to determine toxin conversion. The effects of heating and addition of a natural reductant （glutathione） on toxin conversion were also assessed. The toxin profile was investigated through high performance liquid chromatography with fluorescence detection （HPLC-FLD）. The evident variations in the toxin content were observed only in Chinese scallop viscera homogenates. The concentration of GTX4 was reduced by 45% （approximately 0.8 μmol/dm^3） and 2.% （approximately 1 μmol/dm^3） for GTX1, while GTX2.and GTX3 increased by six times （approximately 1 μmol/dm^3） and 3 times （approximately 0.3μmol/dm^3） respectively. Simultaneously, the total toxicity decreased by 38% during the 48 h incubation period, the final toxicity was 2..4 nmol STXeq/g. Furthermore, heated Chinese scallop viscera homogenates samples were compared with non-heated samples. The concentration of the GTX4 and GTX1 was clearly 2.% （approximately 0.53 μmol/dm^3） and 17% （approximately 0.69μmol/dm^3） higher in heated samples, GTX2.and GTX3 were four times （0.66 μmol/dm^3） and two times （0.187 μmol/dm^3） lower respectively. GSH （＋） Chinese scallop viscera homogenates samples were compared with GSH （-） samples, the concentration in the GTX4 and GTX1 was 9% （approximately 0.12.μmol/dm^3） and 11% （approximately 0.36 μmol/dm^3） lower respectively, GTX2.and GTX3 was 17% （approximately 0.14 μmol/dm^3） and 19% （approximately 0.006 μmol/dm^3） higher respectively. In contrast,there was a little change in the concentration of PSP toxins of Manila clam and Razor shell tissue ho- mogenates. These observations on three shellfish tissues confirmed that there were species-specific differences in P

关键词： paralytic shellfish poisoning (PSP) toxins in vitro transformation viscera and muscle tissues

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

Threshold proxy quantum signature scheme with threshold shared verification

引用

Science china(Physics,Mechanics & Astronomy) 2008年第8期51卷 1079-1088页

作者： YANG YuGuang1,3,4 & WEN QiaoYan2.1 college of Computer Science and technology,Beijing {2. of technology,Beijing 10012.,china 2.State Key Laboratory of Networking and Switching technology,Beijing {2. of Posts and Tele-communications,Beijing 100876,china 3 State Key Laboratory of Integrated Services Network,Xidian {2.,Xi’an 710071,china 4 State Key Laboratory of information Security(Graduate {2. of Chinese Academy of Sciences) ,Beijing 100049,china 1. college of Computer Science and technology Beijing University of Technology Beijing 100124 China 3. State Key Laboratory of Integrated Services Network Xidian University Xi’an 710071 China 4. State Key Laboratory of information Security (Graduate university of Chinese Academy of Sciences) Beijing 100049 China 2. State Key Laboratory of Networking and Switching technology Beijing University of Posts and Telecommunications Beijing 100876 China

A threshold proxy quantum signature scheme with threshold shared verification is proposed. An original signer could authorize a group as its proxy signers. Then only t or more of n persons in the proxy group can generate the proxy signature on behalf of the original signer and any t-1 or fewer ones cannot do that. When the proxy signature needs to be verified,any t or more of n persons belonging to the verification group can verify the message and any t-1 or fewer ones cannot verify the validity of the proxy signature.

关键词： quantum signature threshold proxy quantum group signature threshold shared verification

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

Vision navigation algorithm for mine agent based on quaternion

引用

中国有色金属学会会刊：英文版 2011年第S3期21卷 610-615页

作者： LI Ke-zhao1, 4, LEI Wei-wei1, 2. GUO Zeng-zhang1, 2. WU Li-xin3, ZHANG Qin4 1. School of Survey and Land information Engineering, Henan Polytechnic university, Jiaozuo 454003, {2. 2. Key Laboratory of Mine Spatial information Technologies of State Bureau of Surveying and Mapping, Henan Polytechnic university, Jiaozuo 454003, {2. 3. college of Resources and Civil Engineering, Northeastern university, Shenyang 110819, {2. 4. college of Geology Engineering and Geomatics, Chang’an university, Xi’an 710054, {2. [a] School of Survey and Land information Engineering Henan Polytechnic University Jiaozuo 454003 China [b] Key Laboratory of Mine Spatial information Technologies of State Bureau of Surveying and Mapping Henan Polytechnic University Jiaozuo 454003 China [c] college of Resources and Civil Engineering Northeastern University Shenyang 110819 China [d] college of Geology Engineering and Geomatics Chang'an University Xi'an 710054 China

Autonomous relative navigation is the key technology in mining or rescuing. On the basis of mine requirement and the theories of machine vision, an autonomous relative navigation algorithm for mine agent based on quaternion was proposed. In rotation transformation, this algorithm was represented by using quaternion. Because the Jacobi matrix of this method is lower than that of Hall algorithm, the calculation efficiency is improved by using this algorithm. The results of these experiments show that the computation burden of this algorithm based on quaternion is about half that of Hall algorithm. This algorithm based on quaternion is improved as a valid way to solve the problem of mine real-time navigation.

关键词： quaternion mine agent vision navigation

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

Quantum threshold group signature

引用

Science china(Physics,Mechanics & Astronomy) 2008年第10期51卷 1505-1514页

作者： YANG YuGuang1,2.3 & WEN QiaoYan4 1 college of Computer Science and technology, Beijing {2. of technology, Beijing 10012., china 2.State Key Laboratory of Integrated Services Network, Xidian {2., Xi’an 710071, china 3 State Key Laboratory of information Security (Graduate {2. of Chinese Academy of Sciences), Beijing 100049, china 4 State Key Laboratory of Networking and Switching technology, Beijing {2. of Posts and Tele-communications, Beijing 100876, china college of Computer Science and technology Beijing University of Technology Beijing 100124 China State Key Laboratory of Integrated Services Network Xidian University Xi’an 710071 China State Key Laboratory of information Security Graduate University of Chinese Academy of Sciences Beijing 100049 China State Key Laboratory of Networking and Switching technology Beijing University of Posts and Telecommunications Beijing 100876 China

In most situations, the signer is generally a single person. However, when the message is written on behalf of an organization, a valid message may require the approval or consent of several persons. Threshold signature is a solution to this problem. Generally speaking, as an authority which can be trusted by all members does not exist, a threshold signature scheme without a trusted party appears more attractive. Following some ideas of the classical Shamir’s threshold signature scheme, a quantum threshold group signature one is proposed. In the proposed scheme, only t or more of n persons in the group can generate the group signature and any t-1 or fewer ones cannot do that. In the verification phase, any t or more of n signature receivers can verify the message and any t-1 or fewer receivers cannot verify the validity of the signature.

关键词： threshold quantum signature trusted party quantum cryptography

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 Lactobacillus E1 on the Storage Stability in Emulsion Immobilization

引用

Journal of Wuhan university of technology(Materials Science) 2009年第1期24卷 75-80页

作者：孙欣陈西广 college of Life Science Ocean University of China

A coacervation method with double emulsion strategy （w/o/w） was used to prepare immobilized Lactobacillus E1. Diatomite was chosen as the carrier for bacteria. Sodium alginate, dextrin and gelatin were used as protective solutes for the preservation of Lactobacillus E1 and their effects on the storage viability during storage were discussed. The influence of storage temperature on the storage viability was also examined. The results show that high bacteria viable count over 109 cfu/g for an extended shelf life of 37 d can be achieved with 2. sodium alginate, 5% dextrin and 4% gelatin as protective solutes, at 10 ℃ of the storage temperature. This immobilized Lactobacillus E1 has potential use as functional food ingredient for both human dairy food and animal feedstuff.

关键词： lactobacillus microencapsulation storage viability protective solute shelf life

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

Denitrification in Chongming east tidal flat sediment, Yangtze estuary, china

引用

Science china Earth Sciences 2006年第10期49卷 1090-1097页

作者： WANG Dongqi1,2. CHEN Zhenlou1,3, XU Shiyuan1,2. HU Lingzhen1 & WANG Jun1,2.1. college of Resources & Environment, East china Normal {2., Shanghai 2.0062. china 2. State Key Laboratory of Estuarine and Coastal Sediment Dynamics and Morphodynamics, East china Normal {2., Shanghai 2.0062. china 3. Key Laboratory of Geographical information Science of Ministry of Education,East china Normal {2.,Shanghai 2.0062. china 1. college of Resources & Environment East China Normal University Shanghai 200062 China 2. State Key Laboratory of Estuarine and Coastal Sediment Dynamics and Morphodynamics East China Normal University Shanghai 200062 China 3. Key Laboratory of Geographical information Science of Ministry of Education East China Normal University Shanghai 200062 China

From July 2.03 to July 2.04, samples were collected on Chongming Island east tidal flat every two months. The research showed that the nitrous oxide (N2.) production rate was very low in the water, Chongming east tidal flat (CM) sediment was the N2. source of the water. Sediment N2. natural production rate was between -0.08 and 1.74 μmolN·m-2.h-1. N2. natural production rate was higher in the summer. The difference of the N2. natural production rate in the different tidal flats, the correlation between the N2. natural production rate and the denitrification rate, and those with the temperature and DO indicate that middle tidal flat sediment denitrification was the main process of the N2. production, while in the low tidal flat sediment, the production of the N2. came from several processes of the nitrogen cycling. Tidal flat sediment denitrification reaction was stronger in summer and winter but relatively lower in the late autumn and early spring. Seasonal change of the sediment denitrification rate was wide, from 1.12.to 33.34 μmolN·m-2.h-1. Temperature, DO and the coactions of them had the prominent effect on the tidal flat sediment denitrification.

关键词： Yangtze estuary, tidal flat sediment, denitrification, nitrous oxide, effect factor.

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

THz source based on optical Cherenkov radiation

引用

Science china(information Sciences) 2012年第1期55卷 27-34页

作者： YAO JianQuan1,2.LIU PengXiang1,2.XU DeGang1,2.LV YingJin1,2.LV Da1,2.1Institute of Laser&Optoelectronics,college of Precision Instruments and Opto-Electronic Engineering,Tianjin university,Tianjin 300072.{2. 2.ey Laboratory of Opto-electronics information technology(Tianjin university),Ministry of Education,Tianjin 300072.{2. 1. Institute of Laser & Optoelectronics College of Precision Instruments and Opto-Electronic Engineering Tianjin University Tianjin 300072 China2. Ministry of Education Key Laboratory of Opto-electronics Information Technology (Tianjin University) Tianjin 300072 China

Terahertz(THz)technique has attracted considerable interest due to its broad application *** source is a crucial part of THz science and *** Cherenkov radiation in electro-optic crystals is a promising method of THz generation,because phase-matching is automatically *** this paper,we introduced two types of THz source based on optical Cherenkov radiation:both broadband and tunable *** mechanism of radiation was analyzed and recent development was reviewed in *** future of THz source based on optical Cherenkov radiation was also forecasted.

关键词： Terahertz source optical rectification dierence frequency generation Cherenkov radiation

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Architecture design of low-power motion estimation based on DHS-NPDS for H.2.4/AVC

引用

Science china(information Sciences) 2012年第10期55卷 2234-2242页

作者： CHEN YunBi 1,LI ZhengDong 2.GUO Li 1,XIE JinSheng 1 & ZHAO Long 1 1 Department of Electronic Science and technology,university of Science and technology of china,Hefei 2.002.,china 2.Staff room of Electronic and technology,Chongqing Communication college,Chongqing 400035,china 1. Department of Electronic Science and technology University of Science and Technology of China Hefei 230027 China 2. Staff room of Electronic and technology Chongqing Communication College Chongqing 400035 China

A novel architecture of motion estimation(ME) based on improved normalized partial distortion search is proposed to meet three primary requirements for real-time video encoding,which are low-power,lowbandwidth and high area utilization *** ME engine supports both normalized partial distortion search and adaptive search window *** former can reduce the computational complexity of ME to save power and area;the latter can avoid unnecessary accessing the external memory to lower the data *** proposed engine has been implemented with UMC 90nm CMOS *** implementation results show that,compared with traditional engines,the engine can achieve significant improvements of the hardware efficiency and the power efficiency respectively with a little throughput compromise.

关键词： partial distortion search adaptive search range low-power low-bandwidth pipeline VLSI

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Threshold quantum secret sharing between multi-party and multi-party

引用

Science china(Physics,Mechanics & Astronomy) 2008年第9期51卷 1308-1315页

作者： YANG YuGuang1,2.3 & WEN QiaoYan4 1 college of Computer Science and technology,Beijing {2. of technology,Beijing 10012.,china 2.State Key Laboratory of Integrated Services Network,Xidian {2.,Xi’an 710071,china 3 State Key Laboratory of information Security (Graduate {2. of Chinese Academy of Sciences),Beijing 100049,china 4 State Key Laboratory of Networking and Switching technology,Beijing {2. of Posts and Tele-communications,Beijing 100876,china college of Computer Science and technology Beijing University of Technology Beijing 100124 China State Key Laboratory of Integrated Services Network Xidian University Xi’an 710071 China State Key Laboratory of information Security (Graduate university of Chinese Academy of Sciences) Beijing 100049 China State Key Laboratory of Networking and Switching technology Beijing University of Posts and Telecommunications Beijing 100876 China

A threshold quantum secret sharing (TQSS) scheme between multi-party and multi-party was proposed using a sequence of single photons,which is useful and efficient when the parties of communication are not all present. We described the process of this TQSS scheme and discussed its security. It was shown that entan-glement is not necessary for quantum secret sharing. Moreover,the theoretic effi-ciency was improved to approach 100% as almost all the instances can be used for generating the private key,and each photon can carry one bit of information. This protocol is feasible with the present-day technique.

关键词： threshold quantum secret sharing quantum cryptography single photon multi-party and multi-party

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

Another ID-Based Proxy Signature Scheme and Its Extension

引用

Wuhan university Journal of Natural Sciences 2007年第1期12卷 33-36页

作者： ZHANG Jianhong1,2., ZOU Wei3 1. college of Science, North china {2. of technology, Beijing 100041,china 2. Institute of Software of Chinese Academy of Sciences /State Key Laboratory of information Security, Beijing 100080, china 3. Institute of Computer Science and technology, Peking {2., Beijing 100871, china college of Science North China University of Technology Beijing China State Key Laboratory of information Security Institute of Software of Chinese Academy of Sciences Beijing China Institute of Computer Science and technology Peking University Beijing China

So fur, the security of many proxy signatures has seldom been considered in a formal way and most of them cannot satisfy nonepudiation. In this work, a novel ID-based （Identity-based） proxy signature scheme is proposed by combining the proxy signature with ID-based public cryptography, and they formalize the notion of security for ID-based proxy signature schemes. And show that the security of the proposed scheme is secure. Compured with other proxy signature schemes, it does not need a secure channel. Thus, it is particularly suitable for the unreliable network computation environment. Finally, they extend proposed scheme to a proxy multi-signature which has the following advantages （1） the size of proxy multi- signature is independent of the number of delegating users; （2. the computation cost of proxy multi-signature only need two Weil paring.

关键词： proxy signature multisignature security proof

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：