中国传统重彩壁画的材料语言探析

很多现代绘画门类的产生都脱胎干壁画这种最古老的画种。随着题材内容及制作技艺的日臻完善和丰富,它不仅加强了中华民族文花内部的联系,也提供了观照世界思维方式上的联系。通过对传统壁画重彩材料语言和制作工艺的研究,可以发现正是这种材质的特殊性导致其在中国历史定位中的异质性,以及绘画发展中的局限性。如何去利用这些传统并将其融于现代的生活,使之成为符合时代品味的新传统。这就需要去知其然,更需要去知其所以然。     

炼丹术与《本草经集注》中的矿物知识

《本草经集注》是陶弘景融摄医、道编撰而成的。陶弘景以中医本草学为基础,大量吸收道教服食方术尤其是金丹黄白术的药物知识,为丰富本草学矿物知识作出了重要贡献,并开创了医家本草与道经知识相结合的本草著作编撰模式,对后世本草学产生重要影响。     

甲骨文声符与古埃及圣书字音符表音准确度的差异

通过对甲骨文声符与古埃及圣书字音符的表音准确度进行了对比,发现甲骨文声符的表音准确度较低,圣书字音符表音准确度较高,这对认识自源文字之间的差异有重要意义。     

《陕西省矿山环境保护条例》立法研究

陕西省蕴藏着丰富的矿产资源,加强矿山环境保护地方立法工作是保证陕西省矿产资源合理开发利用的重要途径。由于陕西省矿山环境保护地方立法仍是空白,建议尽快制定与陕西省实际情况相适应的《陕西省矿山环境保护条例》,用以促进陕西省矿产资源开发利用与环境保护的协调发展。     

对矿产资源可持续开发利用的思考

中国要实现全面建设小康社会和现代化建设的目标,不能走过度消耗自然资源特别是不可再生矿产资源的老路.必须立足于中国国情,落实科学发展观,切实转变经济增长方式,走新型工业化道路,矿产资源的可持续发展战略应当确立适度利用的对策,以促进和保证经济社会的可持续发展.     

小麦胚发酵饮料的研制

小麦胚发酵饮料以小麦胚为原料，应用乳酸菌发酵，用正交试验得出发酵条件为：发酵温度38℃，时间8小时，接种量为2％，并测定了产品的氨基酸和矿物质的含量。     

宋代矿冶业中的厢兵生产

宋代从事矿冶业生产的厢兵虽然由官府召募而来 ,但他们对封建国家仍然有很强的人身隶属关系 ,生产条件十分恶劣 ,其中 ,还有一部分人是因犯罪而被配入军队。由于厢兵生产可以解决人手不足的问题 ,并可以为统治阶级带来高额利润 ,因此 ,长期以来一直是官府经营生产的方式之一     

A continuous latent spatial model for crack initiation in bone cement

Summary.  Hip replacements rovide a means of achieving a higher quality of life for individuals who have, through aging or injury, accumulated damage to their natural joints. This is a very common operation, with over a million people a year benefiting from the procedure. The replacements themselves fail mainly as a result of the mechanical loosening of the components of the artificial joint due to damage accumulation. This damage accumulation consists of the initiation and growth of cracks in the bone cement which is used to fixate the replacement in the human body. The data come from laboratory experiments that are designed to assess the effectiveness of the bone cement in resisting damage. We examine the properties of the bone cement, with the aim being to estimate the effect that both observable and unobservable spatially varying factors have on causing crack initiation. To do this, an explicit model for the damage process is constructed taking into account the tension and compression at different locations in the specimens. A gamma random field is used to model any latent spatial factors that may be influential in crack initiation. Bayesian inference is carried out for the parameters of this field and related covariates by using Markov chain Monte Carlo techniques.     

Effects of oral testosterone undecanoate therapy on bone mineral density and body composition in 322 aging men with symptomatic testosterone deficiency: a 1-year,randomized, placebo-controlled,dose-ranging study

Abstract

Objective: We investigated the effects of oral testosterone undecanoate (TU) on bone mineral density (BMD), lean body mass (LBM) and body fat mass (BFM) in aging men with symptomatic testosterone deficiency (TD).

Methods: Three hundred twenty-two men ≥50 years with TD symptoms and calculated free testosterone <0.26?nmol/L participated in a multicenter, double-blind, placebo-controlled trial. Patients were randomized to placebo, oral TU 80?mg/d, oral TU 160?mg/d, or oral TU 240?mg/d, administered as divided doses with normal meals. BMD of the hip and lumbar spine were evaluated by dual energy X-ray absorptiometry (DEXA), and body composition (LBM and BFM) by whole body DEXA.

Results: Oral TU significantly increased BMD at Month 12 at the lumbar spine (240?mg/d), total hip (240?mg/d), and trochanter and intertrochanter (160 and 240?mg/d) compared with placebo. Oral TU significantly increased LBM at Months 6 and 12 for all oral TU groups compared with placebo. BFM significantly decreased at Month 6 (all oral TU groups) and Month 12 (160?mg/d) compared with placebo. The effects on BMD and body composition showed a clear dose response.

Conclusions: Treatment with oral TU led to improvement in BMD, LBM and BFM in aging men with symptomatic TD.     

Benzene Inhalation by Parts Washers: New Estimates Based on Measures of Occupational Exposure to Solvent Coaromatics

Questions persist regarding assessment of workers’ exposures to products containing low levels of benzene, such as mineral spirit solvent (MSS). This study summarizes previously unpublished data for parts‐washing activities, and evaluates potential daily and lifetime cumulative benzene exposures incurred by workers who used historical and current formulations of a recycled mineral spirits solvent in manual parts washers. Measured benzene concentrations in historical samples from parts‐washing operations were frequently below analytical detection limits. To better assess benzene exposure among these workers, air‐to‐solvent concentration ratios measured for toluene, ethylbenzene, and xylenes (TEX) were used to predict those for benzene based on a statistical model, conditional on physical‐chemical theory supported by new thermodynamic calculations of TEX and benzene activity coefficients in a modeled MSS‐type solvent. Using probabilistic methods, the distributions of benzene concentrations were then combined with distributions of other exposure parameters to estimate eight‐hour time‐weighted average (TWA) exposure concentration distributions and corresponding daily respiratory dose distributions for workers using these solvents in parts washers. The estimated 50th (95th) percentile of the daily respiratory dose and corresponding eight‐hour TWA air concentration for workers performing parts washing are 0.079 (0.77) mg and 0.0030 (0.028) parts per million by volume (ppm) for historical solvent, and 0.020 (0.20) mg and 0.00078 (0.0075) ppm for current solvent, respectively. Both 95th percentile eight‐hour TWA respiratory exposure estimates for solvent formulations are less than 10% of the current Occupational Safety and Health Administration permissible exposure limit of 1.0 ppm for benzene.