Crossing the Line

Raising the poverty threshold places millions more in the path of government assistance     

Take the Expo Home

Many visitors acquire Expo-related souvenirs to remind them of the Expo experience For a large number of visitors, shopping at the World Expo’s many souvenir shops in Shanghai has become an integral part of the Expo experience. The     

Struggling Ants

Some of China's college graduates are barely scraping by The village of Tangjialing, 20 km north of down town Beijing, was thrust into the public consciousness in November. Publishers that month released a book titled Ants     

时间观与文化差异

根据人们从客观到主观对时间的感知,可以把时间观分成三种:直线式时间观,环行时间观及事件相关时间观。这三种时间观存在于每种文化中。由于人们时间观的差异,导致人们不同的时间使用方式,这样在跨文化交际中难免产生一些误解。为了减少这种现象的发生,我们在学语言的同时,更应了解不同文化之间的差异。     

A Year of Advances for Women

The year 2009 saw unprecedented media coverage of many issues central to women’s rights. Attention was focused on several social problems commonly afflicting women-employment discrimination,     

法医学相关SNP的分类

法医学的样本通常已经高度腐败降解或是只残留很少的DNA模板，因此，需要改变原有的遗传标记和分析的方法以便更好地应用于日常工作和案件。单核苷酸多态性（SNP）为法DNA分析提供了可能。SNP标记将在具有挑战性的法医学样本分析中发挥重要作用．如分析过度降解的检材．提高对于身份不明和走失者亲缘关系鉴定的能力．或在某些案件中提供嫌疑人的线索。SNP的法医学应用可分为四个方面：身份鉴定SNP、系谱推断SNP、始祖推断SNP和表型推断SNP。     

Traditional to Digital Books

A book fair wouldn't be a book fair without books.And while the number of book fairs in China has increased in recent years,the Guangzhou Book Fair has been helping to redefine the very nature of books by promoting digital works and reading technology.This year,the fair again set up an exclusive digital reading experience exhibition hall to showcase the host province's latest achievements in the field.     

Athenian Adversity

The Greek debt crisis reveals inherent risks in the euro zone The Europeans have seen some fast changes lately-some certainly more welcome than others. The excitement surrounding the celebrations of the Lisbon Treaty’s entry into force had yet to     

牛胸腺素原α基因的原核表达与分析鉴定

为了把牛胸腺素原α(ProTα)开发为免疫增强剂,从重组克隆载体pMD18-T-ProTα上扩增ProTα基因,分别构建和筛选出了pGEX-4T-1-ProTα、pET-30a(+)-ProTα的BL21、BL21codon plus和Rosetta Blue(DE3)plys重组原核表达菌株,采用不同的条件组合对其进行诱导表达。结果,重组菌BL21codon plus-pET-30a(+)-ProTα表达出约24ku和30ku两个蛋白条带,且在37℃、IPTG浓度为0.5mmol/L、诱导3h时表达量最大,重组蛋白主要以可溶性形式存在;而pGEX-4T-1-ProTα重组菌在诸多条件下都未表达出目的蛋白。纯化产物的Western-blot分析显示,重组蛋白可与兔抗人ProTα多抗发生特异性免疫反应,表明重组蛋白具有免疫学活性结构。研究结果为重组ProTα蛋白的结构与功能研究奠定了基础。     

鸡传染性法氏囊病灭活疫苗免疫鸡中和抗体效价与攻毒保护力的相关关系

为了探讨鸡传染性法氏囊病病毒中和抗体效价与攻毒保护力的相关关系,以不同剂量的鸡新城疫、传染性法氏囊病二联灭活疫苗免疫21日龄的SPF鸡,免疫后采血测定鸡传染性法氏囊病病毒中和抗体,并用传染性法氏囊病病毒强毒攻击,攻毒后第72小时,剖检所有试验鸡,观察鸡法氏囊等器官病变。将每只试验鸡的传染性法氏囊病病毒中和抗体效价与攻毒保护情况进行一一对照。结果显示,当传染性法氏囊病病毒的中和抗体效价≥1∶16 384(214)时,可获得100%的保护;效价为1∶8 192(213)时,保护率为95.5%;效价为1∶4 096(212)时,保护率为92.9%;效价为1∶2 048(211)时,保护率为86.1%;效价为1∶1 024(210)时,保护率为76.5%;效价为1∶512(29)时,保护率为53.3%;效价为1∶256(28)时,保护率为33.3%,效价≤1∶128(27)时,保护率为0。试验证明,鸡传染性法氏囊病病毒中和抗体效价与攻毒保护力密切相关。