Ω型轴向槽道热管传热性能的实验研究

论文针对现有热管实验手段的不足，自行搭建了集加热系统、冷却系统、角度调节系统和温度测量系统于一体的Ω型轴向槽道热管传热性能实验台，考察了加热功率、工作倾角、冷却条件等因素对热管工作特性的影响。结果表明：实验所用热管水平放置时最大传热量较小，若改善冷却条件可提高热管的传热能力；当热管放置为重力辅助作用时，热管传热能力显著改善，反向放置时，热管无法正常工作。研究结果对于热管在飞行器中的应用研究具有参考价值。     

Isothermal DNA amplification in vitro: the helicase-dependent amplification system

Since the development of polymerase chain reaction, amplification of nucleic acids has emerged as an elemental tool for molecular biology, genomics, and biotechnology. Amplification methods often use temperature cycling to exponentially amplify nucleic acids; however, isothermal amplification methods have also been developed, which do not require heating the double-stranded nucleic acid to dissociate the synthesized products from templates. Among the several methods used for isothermal DNA amplification, the helicase-dependent amplification (HDA) is discussed in this review with an emphasis on the reconstituted DNA replication system. Since DNA helicase can unwind the double-stranded DNA without the need for heating, the HDA system provides a very useful tool to amplify DNA in vitro under isothermal conditions with a simplified reaction scheme. This review describes components and detailed aspects of current HDA systems using Escherichia coli UvrD helicase and T7 bacteriophage gp4 helicase with consideration of the processivity and efficiency of DNA amplification.     

微波辐射法快速制备龙虾壳聚糖工艺的研究

以地产龙虾壳为原料．探讨微渡辐射法快速制备壳聚糖的工艺。着重时微波辐射法制备壳聚糖的加热时间、碱液浓度等对壳聚糖脱乙酰度、粘度等性质的影响进行研究，并和酸碱法制备壳聚糖的方法进行比较。结果表明：微波辐射法制备龙虾壳聚糖的适宜工艺为：碱液浓度45％；微波加热15min；微波功率280W；具高效性。用该法制备的龙虾壳聚糖的红外光谱和X射线衍射谱图与市售生化级壳聚糖的图谱基本一致，且工艺设备简单，操作方便，具有较强的推广性。     

Über die Reaktion des 5,5-Diphenylglykocyamidins und seiner N-Alkylderivate mit Ammoniak und Aminen

Summary 5,5-Diphenylglycocyamidines bearing an alkyl group in position 3 are partly rearranged to the corresponding N²-alkyl derivatives on heating with alcoholic ammonia in the presence of ammonium acetate. Prolonged heating with ammonium acetate leads to N-dealkylation both of N³- and N²-alkyl derivatives. 5,5-Diphenylglycocyamidine in turn is mono- or dialkylated at N² on heating with the acetates of primary and secondary amines respectively. A mechanism for these reactions is proposed.

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Mitteilung über Hydantoine, Thiohydantoine und Glykocyamidine.

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Mitteilung:K. Lempert, Magyar Tudományos Akadémia Kémiai Tudományok Osztályának Közleményei [Ber. Ung. Akad. Wiss., Kl. Chem. Wiss.]12, 59 (1959). — Chem. Reviews59, 667 (1959).     

The effect of head heating on the flight activity of the cockroach

Summary Internal head heating restricted the flight activity in the cockroachPeriplaneta americana. Heating the metathoracic ganglion did not have any pronounced effect on the flight. It is concluded that in the cockroach the head nervous centers are very heat-susceptible and might be the coordinating center for temperature responses.     

Insoluble zinc-precipitated phosphomonoesterase from rat kidney

Summary The insoluble form of phosphomonoesterase precipitated by means of Zn²⁺-ions was prepared from the partially purified extract of rat kidney. The freeze-dried preparation of the precipitated enzyme is highly active and is stable on heating at 100°C.     

A rapid method for measuring the phospholipid synthetic activity of incubated lymphocytes

Summary A rapid and simple method for estimating the phospholipid synthetic activity of incubated lymphocytes by a Florisil column technique following the uptake of¹⁴C-oleic acid was established. Stimulation of phospholipid synthesis by PHA and inhibitions caused by Tween 20 or Tween 80 and heating were evaluated easily with this method.     

The effects of legume seed extracts on plant virus infection

Summary Extracts from the seeds of 15 species of legume inhibited the infection of plants by viruses. Extracts could be divided into those with marked inhibitory activity reducible on heating and those with less marked inhibitory activity which increased on heating. Evidence is given to suggest that seed extracts contain both virus inhibitors and augmenters and that the inhibitors are high molecular weight proteins possibly related to lectins.     

The effects of legume seed extracts on plant virus infection

Extracts from the seeds of 15 species of legume inhibited the infection of plants by viruses. Extracts could be divided into those with marked inhibitory activity reducible on heating and those with less marked inhibitory activity which increased on heating. Evidence is given is given to suggest that seed extracts contain both virus inhibitors and augmenters and that the inhibitors are high molecular weight proteins possibly related to lectins.     

湖南益阳陶粒页岩烧成制度的确定

以湖南益阳某矿山的页岩为研究对象,在地质调查基础上,通过XRD分析、TG-DSC分析确定了页岩陶粒的基本特征；用高温润湿角测定仪、箱式电炉确定了陶粒页岩的发生膨胀的温度范围；分析了保温时间、升温速率等因素对陶粒页岩膨胀的影响；获得了该页岩理想的烧成制度.在实验室研究的基础上组织了两次工业级中试试验,获得了各项指标均达到GBT17431.2-2010标准要求的页岩陶粒产品.     

Umlagerung von Azulen in Naphthalin

Summary Azulene (I) is converted into Naphthalene (II) by heating for 48 hours to 330° C.

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74. Mitt. zur Kenntnis der Sesquiterpene.     

Pharmakologische Charakteriserung von synthetischem Hypertensin

Summary Synthetic hypertensin, RH II, a Val₅octapeptide shows the same pattern of activity as natural hypertensin (angiotonin). In the normal rat, and in the rat pretreated with ganglionic blocking substances, the hypertensive activity corresponds to that of nor-adrenaline while it is enhanced in the nephrectomised animal. In the intact animal, hydralazine diminishes the hypertensive effect, while Regitin, Chlorpromazine and Reserpine are without effect. On the perfused vessels of the rabbit's hind limb, RH II produces a vasoconstriction which is diminished by Chlorpromazine and hydralazine, but not by Regitin. RH II is not destroyed by heating, but by freshly prepared kidney extract.     

The lectins fromAgaricus edulis. Isolation and characterization

Summary 2 lectins from the mushroomAgaricus edulis were isolated, after heating the crude extract at 75°C, by ion exchange chromatography and gel chromatography using QAE-Sephadex A-50 and Sephadex G₇₅. Some hemagglutinating and physicochemical properties of the agglutinins are reported.     

Antigenicity of thermal denatured yoshida glycoprotein

Summary The correlation between antigenic functionality and conformation of Yoshida glycoprotein upon heating has been investigated. Heating modifies the conformation of the antigen, but does not abolish the reaction with its specific antibody.     

A heated stage and tissue culture chamber for electrophysiology

Summary A simple, inexpensive heating circuit is described for use with a warmed microscope stage, small tissue bath, and heated tissue culture chamber. A major consideration in the design of the apparatus is a compatability with electrophysiological studies. Thus, proper shielding and low profile for microelectrode positioning are featured.Acknowledgment. We wish to thankWilliam F. Dryden for his helpful comments and advice in apparatus design.     

氧化酪蛋白对小鼠组织抗氧化能力及血液肽组成的影响

目的研究酪蛋白经过加热氧化和脂质过氧化物MDA氧化后，对小鼠体内氧化还原状态及小鼠血液中肽组成的影响。方法酪蛋白经100℃加热（0、30、60、90min）和丙二醛（MDA）氧化（MDA终浓度0、0．2、20、200mmol／L）处理，测定其羰基、巯基含量及表面疏水性的变化。小鼠分为四组，分别灌胃生理盐水、正常酪蛋白、加热90rain、MDA氧化酪蛋白，测定0、30、60、90、120、160min血液中自由基水平，并采用HPLC-MS分析灌胃后120min小鼠血浆肽组分的变化，测定小鼠的肝脏、空肠、十二指肠组织抗氧化能力指标（总抗氧化能力T—AOC、丙二醛MDA、还原型谷胱甘肽GSH）。结果酪蛋白经过两种氧化处理，羰基含量均随氧化程度呈显著上升，巯基含量呈下降趋势。加热氧化后酪蛋白表面疏水性比正常酪蛋白低，而MDA氧化导致疏水性上升。小鼠血液中自由基最高峰出现在灌胃后160min。灌胃两种方式处理的酪蛋白，血液中自由基的含量均显著高于灌胃正常酪蛋白组（P〈0．05），肝脏、空肠、十二指肠还原型谷胱甘肽（GSH）含量和总抗氧化能力（T-AOC）均低于正常酪蛋白组，丙二醛（MDA）含量显著提高（P〈0．05）。HPLC—MS分析显示，灌胃MDA氧化酪蛋白组血液中肽组成与对照组不同，出现c7H15N4O含羰基类的物质：结论氧化会导致酪蛋白理化性质的改变，摄入氧化酪蛋白引起机体的氧化应激，降低组织抗氧化能力。     

Der Typus der Polymerisation des flüssigen Vinylchlorids

Summary Pure liquid vinyl chloride cannot be made to polymerize through heating it up to 110°. In the presence of benzoylperoxide on the contrary polymeres with large molecules are formed by rapid reactions already at low temperatures (20°–50°). In this respect vinyl chloride distinguishes itself from the aromatically substituted ethylenes, which polymerize not only in the presence of peroxide but also in consequence of a purely thermal stimulus.     

PCR仪中TEC模块的PWM功率驱动装置设计

本文针对PCR仪温控系统中TEC模块的驱动要求，设计了其PWM功率驱动装置。以SG3525A为核心设计了PWM信号产生电路，采用功率模块MSK4226实现PWM信号功率的放大，设计了低通滤波器和保护电路，并采用MSP430单片机对功率驱动装置进行控制。测试结果表明此PWM功率驱动装置很好地满足了所用TEC模块的驱动要求。应用本功率驱动装置的PCR仪取得了较好的温度控制效果：升温速率〉2．2℃／s，降温速率〉1．8℃／s，｜稳态误差｜〈0．20℃，超调量〈1．0℃。