The study of the interaction between the enantiomer and chiral shift reagent in the determination of enantiomeric purity& betr method

A novel and simple 1H-NMR method for determination of enantiomeric purity, BETR, is studied.

BETR法是通过CPMG脉冲系列消除手性位移试剂的宽峰，用~1H-NMR测定对映体含量的一个新而简单的方法。

The results also indicate that anti-feeding rate and death rate as well as growth inhibition rate of armyworm have correspondingly changed with the concentration change of the extract: the higher the concentration of extracts applied on armyworm, the bett the anti-feeding effect.

研究还表明，随乙酸乙脂萃取物浓度的变化，粘虫的拒食率、死亡率及生长发育抑制率都会有相应变化。且随着萃取物浓度的增加，对粘虫的拒食作用增强。

Bett Padgett, who heads the Outer Banks Lighthouse Society, which petitioned the federal government for funds to restore Bodie Island's once-crumbling lighthouse, warns of solar flares knocking out satellites.

外班克斯列岛灯塔协会（该协会曾请求联邦政府拨款整修一度年久失修的Bodie灯塔）会长Bett Padgett提醒人们太阳耀斑会让卫星暂时失灵。

We're King bett america.

我们使美国的明天更好。

The need for schools to prepare for21st century learning was top of the agenda at this year's BETT conference.

本年度英国教育技术展的首要任务是让学校为21世纪的学习做好准备。

Hi, this is Audrey at the Betz clinic.

嗨，我是贝兹诊所的奥戴莉。

The power use coefficient reach the decide value when the turbine speed and the wind speed achieve the optimal ratio, according to the Betz theory.

根据贝兹理论当风机转速与风速成最佳叶尖速比时功率利用系数可达设计数值，因而控制叶尖速比成为提高风能利用效率的关键。

Based on the condition for Betz's minimum energy loss, a optimal design code of propeller is developed.

基于Betz最小能量损失条件，建立了螺旋桨优化设计软件。

It is known that the coefficient is 0.593 to maximum by Betz Theory.

由贝兹理论可知，该系数最大为0.593。

She participated in a medical study at the Betz clinic.

她参与了贝兹诊所的一项研究。

Up to now, the most widely used code tracking performance evaluation theory is presented by Betz.

目前，导航领域应用最广泛的伪码跟踪精度评估理论由Betz创建。

This is known as the Betz Limit.

这就是众所周知的贝茨极限。

Methods Between August 1993 and December 2001, BFHR or THR were performed in 48 old patients ( at age of 60-85 years, mean 70.8 years) with subcapital and transcervical types of FNF.

方法1993年8月～2001年12月采用双极股骨头或全髋关节置换手术，治疗老年股骨颈头下型或经颈型骨折48例，年龄60～85岁，平均70.8岁。

In the 10 patients treated with BFHR, 2 got mild hip pain and limp.

人工股骨头置换组10例，2例出现轻度髋部疼痛和跛行。

Occurrence rate of hip and thigh pains in the Group THR was3% ( 1/ 29), lower than that in the Group BFHR ( 4/ 16).

全髋置换组髋部和大腿疼痛的发生率为3%（1/29），低于股骨头置换组的发生率（4/16）。

Nokia does well: the world's biggest handset-maker has already got rid of PVC from its products and will eliminate all BFRs from next year.

诺基亚做得比较好。这个世界上最大的手机制造商在产品中已经不用聚氯乙烯了，并将从明年开始淘汰所有溴化物阻燃剂。

Brominated flame-retardants ( BFRs) are a new, diverse group of global environmental pollutants.

溴化阻燃剂（Brominated flame-retardants，BFRs）是一类新型的全球性环境污染物。

Distribution Characteristics and Analysis of Source Fate for OCPs and BFRs in Soil and Atmosphere of Harbin

哈尔滨市土壤与大气中OCPs和BFRs分布特征及源汇分析

Brominated flame retardants ( BFRs) are widely used industrial chemicals.

溴化阻燃剂（BFRs）是在生产中普遍使用的工业化学制剂，种类繁多。

The Directive on Restriction of Hazardous Substances ( RoHS) in Europe Union has definitely stipulated to forbid manufacturing some BFRs.

欧盟限制电子电器产品中有害物质的指令（RoHS）明确规定限制某些溴阻燃剂的使用。