固态发酵生产SCP的培养基研究

目的 进行固态发酵生产单细胞蛋白(Single Cell Protein，SCP)的培养基研究。方法 以苹果渣固态发酵生产单细胞蛋白(SCP)为例，采用L9(3^4)正交实验，分别以粗蛋白含量、真蛋白含量、氨基酸总量为测定指标，进行极差分析和方差分析。结果 以粗蛋白含量、氨基酸总量为测定指标时均存在不足，以真蛋白含量为测定指标可以较好地完成培养基的研究。结论 真蛋白含量为培养基研究的最佳测定指标，同时确定了较优培养基配方。     

Optimization of a Direct Sample Insertion Into a Stabilized Capacitive Plasma for Optical Emission Spectrometry (SCP-OES)

 A new sample insertion device for the stabilized capacitive plasma (SCP) has been developed, which enables it to analyze dry residues of micro amounts of liquid samples. Insertion was applied into an SCP as plasma source because of its good stability and excitation properties as well as its low instrument and operation costs. The plasma is sustained at a frequency of 27.12 MHz and an RF power of 150 W. For analysis the liquid samples are positioned at the tip of a quartz rod with the aid of a μL syringe. Then the sample is dried and the sampling rod inserted into the plasma. After optimization of the carrier gas flow (5 L/h) and the sample volume (20 μL) the detection limit for Pb with Ar as plasma gas is 200 pg. By further improving the guidance of the insertion detection limits for Pb, Cu, Cd and Mg in the 1 to 30 ng/mL range or 20 to 600 pg range absolute were obtained. It was found that the detection limits in the case of He are better than those obtained with Ar. The matrix interferences caused by changes in the concentration of the easily ionizable element Na were found to be below 10% for Na concentrations of up to 0.45 μg/mL. Ethanol concentrations of up to 14% in the analyte solutions did not cause any interferences. Received December 17, 1998. Revision June 4, 1999.     

DICOM图像显示与传输的研究与实现

本文在研究DICOM 3．0协议的基础上,阐述了DICOM图像的存储结构,深入研究了DICOM通信协议,设计并实现了DICOM图像显示与传输系统。     

中国应急产业体系构建

 构建中国应急产业体系在夯实应急管理基础，提升应急响应和实战能力，强化应急科技和信息支撑等方面具有重要的保障作用。基于国家重点发展应急管理的大背景，从理论和实践两方面，阐明了中国应急产业体系的发展现状；基于拓展的结构-行为-绩效（SCP）范式，建立了单向静态模型和动态反馈模型，理清了构建应急产业体系4大要素之间的关系；依照范式的逻辑内涵，对照4大要素的内在关系，将政策、产品、技术、服务和教育5大体系囊括其中，提出构建中国应急产业体系的框架思路。     

Nonadditive Strong Commutativity Preserving Maps

The goal of this note is to characterize strong commutativity preserving maps on prime or semiprime rings without the additivity assumption on the maps considered in the literature.     

Element Specific GC-Detection by Plasma Atomic Emission Spectroscopy—A Powerful Tool in Environmental Analysis

Abstract

A new Plasma Emission Detector (FED) to be used in gas chromatography has been developed, consisting of a capacitively coupled helium plasma operating at 200 W and 27 MHz and a poly-chromator system. Elements such as H, C, N, O, S, F, Cl, Br and I can be simultaneously detected, giving way to new possibilities of measuring organic environmental pollutants.

1. Non-separated compounds can be easily measured with the FED, as long as the compounds contain different hetero-elements.

2. The calibration for a complex system as for example the chlorinated HC's demands only for a single standard.

3. The simultaneous detection of all elements of a separated compound allows the calculation of the total molecular formula.

The detection limits for different elements lie between 50 and 200 pg/sec at a signal to noise ratio of 3 to 1.     

V网伴侣业务平台与SCP之间的故障检测机制的设计

V网伴侣业务与传统的VPMN业务(移动虚拟专网业务)在语音呼叫流程上高度融合,设计V网伴侣业务平台与SCP(业务控制点)之间的故障检测机制是为了保障V网伴侣业务平台发生故障情况下,用户原有的VPMN业务不受影响.首先分析了V网伴侣业务中手机发起的呼叫流程,然后讨论了基于EB-NCSP业务平台的V网伴侣业务平台与SCP之间的故障检测机制的设计.     

Recent advances in sample preparation techniques and methods of sulfonamides detection – A review

Sulfonamides (SAs) have been the most widely used antimicrobial drugs for more than 70 years, and their residues in foodstuffs and environmental samples pose serious health hazards. For this reason, sensitive and specific methods for the quantification of these compounds in numerous matrices have been developed. This review intends to provide an updated overview of the recent trends over the past five years in sample preparation techniques and methods for detecting SAs. Examples of the sample preparation techniques, including liquid–liquid and solid-phase extraction, dispersive liquid–liquid microextraction and QuEChERS, are given. Different methods of detecting the SAs present in food and feed and in environmental, pharmaceutical and biological samples are discussed.     

固态发酵淀粉质原料生产单细胞蛋白

采用YUZ-500型圆盘式固态发酵器,选 SC_(85)、ST_(851)和SU_(64)菌株,以固态发酵技术,将淀粉质原料转化成单细胞蛋白(SCP).其产品含粗蛋白40％以上,蛋白质净增25％,其中氨基酸含量占总蛋白质的82.5％蛋氨酸含量占氨基酸总量4.33％,尚含有多种酶、维生素及微量元素.将产品对肉食鸡、肉兔、罗菲鱼的增重和产蛋鸡的产蛋率进行饲喂试验,结果与鱼粉组对比,无显著性差异,表明该产品可替代鱼粉,动物安全性评价试验结果证明该产品实属无毒,安全可靠。     

亚硫酸对小麦苗脂质过氧化的影响及磷酸缓冲液的防护作用

低浓度亚硫酸处理可使麦苗的ＳＯＤ活性增强，ＭＤＡ积累减少，质膜透性减小。高浓度的亚硫酸对麦苗造成伤害，使其ＳＯＤ活性下降，ＭＤＡ含量及质膜透性加大。ＳＯＤ活性，ＭＤＡ含量、擀帮腔 性三者具有较强的相关性。