水基淬火液用聚醚的开发和应用

简述了利用聚醚的逆溶性，用作水基加工液中重要添加剂的原理和性能，并介绍了水基淬火液用聚醚的制造方法及应用。     

Synthesis,characterization, and properties of novel organic/inorganic epoxy hybrids containing nitrogen/silicon via the sol–gel method

Organic–inorganic hybrids were prepared with a diglycidyl ether of bisphenol A (DGEBA) type epoxy and silane‐modified isocyanuric acid triglycidyl ester via the sol–gel process. The DGEBA‐type epoxy was modified by a coupling agent to improve the compatibility of the organic and inorganic phases. The sol–gel technique was used successfully to incorporate silicon and nitrogen into the network of hybrids, increasing the thermal stability. Fourier transform infrared and ²⁹Si‐NMR were used to characterize the structures of the hybrids. The results revealed that trisubstituted siloxane bonds (T 3 ) was the major environment forming a network structure. The morphology of the ceramer was examined with scanning electron microscopy, Si mapping, and transmission electron microscopy. The particle sizes were less than 100 nm. The hybrids were nanocomposites. The ultraviolet–visible spectra of the epoxy hybrid showed no obvious absorbance over a range of 400–800 nm. This phenomenon revealed that the hybrids were transparent. The thermogravimetric analysis revealed that the char yields of the hybrids increased with the contents of the inorganic components. The integral procedure decomposition temperatures of the hybrids were higher than that of the pure epoxy. The thermal stability of the hybrids increased with the contents of the inorganic components. The inorganic components could improve the thermal stability of the pure epoxy. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007     

高浓度珠光塑料母粒的研制

本文介绍了高浓度珠光塑料母粒的性能、生产方法及应用前景。     

钢骨混凝土构件的受剪承载力计算

介绍了钢骨混凝土构件的斜截面受力性能和受剪承载力的计算方法,并通过例题对计算方法进行了说明。     

应用人工神经网络理论预测综采工作面技术经济指标

应用人工神经网络理论,在对大同矿区的综采工作面的实际资料进行分析的基础上,建立了综采工作面经济指标神经网络预测模型,就综采工作面的月产量、月进度、回采工作面效率、期末人数４项综合技术经济指标进行了预测,其预测结果较为准确与实际相吻合。     

羊毛织物数码喷墨印花用浆的研究与应用

根据数码喷墨印花工艺对浆料的要求和特点,对羊毛织物数码印花浆料中的糊料及助剂的选择进行了分析探讨,给出了前处理浆料的配方、上浆方法及工艺条件。结合实际生产对羊毛及羊绒织物数码喷墨印花的墨水、喷印时的技术要求及印花后处理的工艺条件进行了详细的介绍。     

In-vitro transdermal permeation of oxycodone: (I) effect of PH, delipidization and skin stripping

The effect of pH, skin stripping and delipidization on the in-vitro transdermal permeation of a weak base analgesic, oxycodone (pKa=8.53), was studied using hydrodynamically calibrated Valia-Chien diffusion cells. Saturated oxycodone. HCl solutions in citrate-phosphate buffers ranging from pH 4 to 10 were used as the donor solution. Skin samples from the abdominal and dorsal sites of hairless rats, abdominal site of hairless mouse, rabbit pinna ear, as well as human cadaver skin were used in permeation studies. The pHs at which maximum flux attained varied from 6.5 to 7.5 depending upon animal model. The permeabilities of protonated form through intact skin of all the animal models used, was about 7-15 fold lower than that of nonionic form. The unexpected high permeation rate at pHs ranges 4 to 6.5 across human cadaver could be attributed to the possible damage upon storage. The skin stripping and delipidizaton process appeared to increase the permeation rates of oxycodone and the degree enhancement is dependent upon the pH in the donor compartment.     

Identification of a transforming growth factor alpha-like molecule in human seminal plasma

In a double-blind controlled trial, 91 middle-aged and elderly women with mild to moderate hypertension who were not on antihypertensive medication were randomly assigned to treatment with magnesium aspartate-HCl (20 mmol Mg/d) or placebo for 6 mo. Magnesium aspartate-HCl in the given dose was well-tolerated and was not associated with an increased frequency of diarrhea compared with placebo. At the end of the study, systolic blood pressure had fallen by 2.7 mm Hg (95% CI -1.2, 6.7; P = 0.18) and diastolic blood pressure by 3.4 mm Hg (1.3, 5.6; P = 0.003) more in the magnesium group than in the placebo group. Blood pressure response was not associated with baseline magnesium status, as measured by dietary magnesium intake and urinary magnesium excretion. Urinary magnesium excretion in the magnesium group increased by 50% during the intervention period. No changes were seen in other biochemical indexes, including serum concentrations of total and high-density-lipoprotein cholesterol. The findings suggest that oral supplementation with magnesium aspartate-HCl may lower blood pressure in subjects with mild to moderate hypertension.     

用聚合物浸渍氚化混凝土固化含氚废水

本文介绍了固化含氚废水的聚合物浸渍氚化混凝±(PITC)方法。还报道了 PITC 固化体浸出试验和抗压强度的结果。试验结果表明,PITC 可使固化体的氚累积浸出分数较普通水泥固化体降低1—2个数量级。