内源的

According to the demand of high magnetic field power supply, reference is increased with a set ramp rate and stops at a set stable value, so reference system is composed of digital setting and digit to analog converting circuit. But the stability of reference is mostly guaranteed by the performance of D/A circuit, so D/A circuit is particularly studied in reference system. The scheme of D/A circuit, the selection of DAC and its voltage reference, hardware anti-jamming design and PCB design are discussed in detail, and software of remote control and PLC are discussed in brief. Zero-flux DC current transformer well satisfies the demands of the high stability of Load current detection unit, so the principle of zero-flux DC current transformer is analyzed; in the mean time a project which detects the long term stability is designed. During 8 hours, analog signal which is detected with high precision digit multimeter is recorded in computer at 1HZ frequency by GPIB communication. The drift error source and related parameters are explained in the compare-amplify part. Detailed subtraction circuit is designed; also amplifier chip and periphery components are selected and verified according to the theory of error analysis.

根据强磁场电源的需求，参考源应按照软件设定的斜率逐渐上升到设定稳态值，则参考源系统应由数字给定和数模转换电路两大部分组成，而参考源的稳定度主要依靠完成数模转换功能的模拟电路的性能来保证，因此本文对参考源系统的研究以数模转换电路为重点，分别从电路方案的确定、数模转换芯片及其基准电压源的选取和验证、电路板硬件抗干扰和PCB设计几方面进行了论述，然后对数字给定部分的远控组态和PLC程序设计作了简要介绍；采用零磁通原理的直流电流转换器很好地满足了对负载电流检测单元高稳定度的需求，本文详细分析了零磁通检测的原理，并在选定此种类型电流转换器的基础上设计了一套检测长期稳定度的方案，8小时内以1秒为采样周期，通过计算机Labview程序和高精度数字电压表的GPIB通讯，将被高精度数字电压表数字化后的模拟信号采样值连续记录至计算机中；比较放大环节简要阐述了漂移产生的原因和相关参数指标，确定了具体的减法电路形式，并根据误差分析理论对运算放大器和外围元器件进行了选取和验证。

The extraction of the residue endogenic protease of waste brewer yeast was studied with the ultrasonic cell-break method.

采用超声波破碎法对啤酒废酵母残余的内源蛋白酶进行提取，并以酪蛋白为底物测定内源蛋白酶的活力。

This paper presented an overview on the research, application and characterization of ERG in oil crops.

本文综述了油料作物内源特异参照基因的研究概况和存在问题，有助于对油料作物及其它作物内源特异参照基因的进一步开发和深入研究。

The endogenous hormone changes of cutting woods trees and those of softwood cuttings were contrarieties.

采穗母树的内源激素变化与插条的内源激素变化相反。

The dynamic changes of the fruit growth and development as well as the endogenous hormones in the pulp and seeds were investigated. The results showed that there was an affinitive relation among the content of endogenous hormones of the pulp, seeds and the fruit growth.

为试材，对其果实不同发育时期果肉及种子中内源激素含量的变化动态进行了测定分析，结果表明，甜樱桃果肉及种子中内源激素含量与其果实的生长发育有密切关系。

The changes of the endogenous hormone of stem apices in tomato, and the functions of relevant endogenous hormone in tomato during floral bud differentiation stage were studied.

研究番茄茎尖内源激素的变化动态，探讨番茄花芽分化期相关内源激素的作用。

The cause of hindering the gynospore formation was short of boronin chestnut orchard,which led to the poor pollination and a decrease ofendogenous GA1/3, iPAs level and an increase of endogenous ABA level in ovary,which restrained the mother cell division of gynospore.The low level ofendogenous GA1/3,iPAs contents and the increase of endogenous ABA contentcaused a serious lack of reducing sugar,starch,protein and potassium in ovary,which led to a cease of young embryo development.

其中，大孢子形成过程的停滞是由于栗园B素缺乏，致使授粉不良和子房内源GA1/3、iPAS等含量下降，ABA含量上升，从而抑制大孢子母细胞分裂；幼胚发育停滞则是由于子房内源GA1/3、iPAS等生长类激素的上升启动受阻，继续处于低水平，ABA上升，使子房中还原糖、淀粉、蛋白质和K素积累受阻，造成营养严重缺乏。

Analysis of endohormone using ELISA(Enzyme Linked Immunological Sorbent Assay)showed contents of ABA increased while iPA decreased during bulbing,which is similar tophysiological dormany and sencence.

采用酶联免疫吸附测定法对试管鳞茎形成过程中的内源激素分析结果表明，鳞茎形成过程中，内源激素变化表现休眠和衰老的生理趋势，ABA含量不断升高，iPA含量不断下降。

The contents of IAA and ABA in rootlets and shoots of tea plant(Camellia sinensis L.)were analyzed by HPLC,and the relationships between tea plant development amd endogenous hormones were studied.

通过用HPLC检测茶树根系及芽梢的内源激素IAA和ABA含量，研究了茶树生长与内源激素的关系。

The content of IAA synthesized in shoot apex and diffusible IAA of irondeficient bean plant was higher than that of control plant on the 1st day afterFe-deficient treatment,and content IAA in shoot apex increasedcontinuously afterwards.

缺铁处理菜豆植株茎尖的内源IAA及扩散型IAA在处理后第1天就明显高于对照，且在以后的几天中茎尖中内源IAA持续增加。

It seems likely that Kraft will return with a better offer.

看起来卡夫要重新考虑一个更好的出价了。

But he'd rather burn off my feelers and watch me squirm.

可他却放任那个家伙对我为所欲为！