油田水CaCO_3结垢反应的计算与应用

以热力学计算为基础，广泛采用油田水的数据．计算了ＣａＣＯ３的预测条件，并根据油田生产实际，建立了使用防垢剂时的预测模型．根据理论模型编制成计算机程序，并与文献结果和油田观测结果进行了对比，提出了临界浓度和临界稳定常数的计算和应用方法．为防垢剂的选择提供了理论依据，大量计算表明，预测结果与文献和现场观测结果相符．     

Dirichlet公式的简化证明及应用

本文给出了Ｄｉｒｉｃｈｌｅｔ公式的一个简化证明，极易掌握。利用这一公式导出了一个含双参数的级数及其和的表达式。适当选取参数，得出了几个新的收敛级数。     

动力减振实验装置的结构设计与研制

介绍动力减振实验装置的结构、实验的方法、步验与数据处理。实验结果表明所采用的设计方法是合理的、可行的。     

光照诱发雪鸡恢复性机能活动

采用联合光照方法，使处于性休止期的雪鸡恢复性机能活动。雄性可产出形态正常的精子；雌性输卵管发育并能产卵，由此揭示：采用联合先照技术，有助于改变雪鸡季节性繁衍后代的习性。     

绿豆子叶衰老过程中线粒体膜对几种氨基酸的透性

采用线粒体膨胀技术就不同衰老程度的绿豆子叶线粒体膜对氨基酸的透性进行了测定，结果表明，随着绿豆子叶的衰老，离体线粒体膜在脯氨酸、丝氨酸和甘氨酸等渗溶液中的膨胀率从２ｄ龄至５ｄ龄子叶逐渐下降，５ｄ龄时，线粒体结构与功能已受到明显破坏，文中对膨胀率下降的原因进行了讨论。     

光纤色散与OFDL信号处理

光纤色散对OFDL器件功能的影响并不总能忽略。对OFDL陷波器,在现有器件水平下,由于色散ND只能达到30dB左右,远低于测量系统的限制(>55dB)。利用陷波器,也可以测量光纤色散、该方法具有步骤简便、对器件要求低、精度高等优点。     

浙江沿海虾蛄生物学及其开发利用研究报告

本文根据浙江省教委、省基金、舟山市科委关于浙江沿海虾蛄生物学及其开发利用研究的要求，对四年多来的研究进行总结，主要包括资源与分布、生物学习性、暂养及运输技术、营养成份分析、开发利用等诸方面     

三种饲料添加剂对幼兔增重及饲料转化率的对比试验

对新球虫灵,喹乙醇,免健宝Ⅰ号,Ⅱ号配套复合饲料添加剂进行的幼兔饲养对比试验结果表明:以免健宝Ⅰ、Ⅱ号配套复合饲料添加剂联合效果为最佳,其它依次为单用兔健宝Ⅱ号、兔健宝Ⅰ号、喹乙醇,新球虫灵。而且兔健宝Ⅰ、Ⅱ号配套复合饲料添加剂有易混匀,简化配合饲料工序、节省饲料及增重快等优点。     

Targeted disruption of the mouse transforming growth factor-beta 1 gene results in multifocal inflammatory disease.

Transforming growth factor-beta 1 (TGF-beta 1) is a multifunctional growth factor that has profound regulatory effects on many developmental and physiological processes. Disruption of the TGF-beta 1 gene by homologous recombination in murine embryonic stem cells enables mice to be generated that carry the disrupted allele. Animals homozygous for the mutated TGF-beta 1 allele show no gross developmental abnormalities, but about 20 days after birth they succumb to a wasting syndrome accompanied by a multifocal, mixed inflammatory cell response and tissue necrosis, leading to organ failure and death. TGF-beta 1-deficient mice may be valuable models for human immune and inflammatory disorders, including autoimmune diseases, transplant rejection and graft versus host reactions.     

Short alanine-based peptides may form 3(10)-helices and not alpha-helices in aqueous solution.

Short alanine peptides, containing 16 or 17 residues, appear to form alpha-helices in aqueous solution. But the main spectroscopic analyses used on helical peptides (circular dichroism and nuclear magnetic resonance) cannot distinguish between an alpha-helix (in which the ith residue is hydrogen-bonded to residue i + 4; ref. 9) and the next most common peptide helix, the 3(10)-helix10 (i-->i + 3 hydrogen-bonding). To address this problem we have designed single and doubly spin-labelled analogues of alanine-based peptides in which the nitroxide spin label forms an unbranched side chain extending from the sulphur atom of a cysteine residue. Here we report the circular dichroism, Fourier-transform infrared and electron-spin resonance spectra of these peptides under helix-forming conditions. The infrared absorbance gives an amide I' band with a frequency that is substantially different from that observed for alpha-helices. The electron-spin resonance spectra of doubly labelled helices show that the ranking of distances between side chains, around a single turn (residues 4-8), is inconsistent with an alpha-helical structure. Our experiments suggest that the more likely peptide geometry is a 3(10)-helix.