矿业权不能纳入物权法的法理论证——兼议矿业权的虚无性

中国政法大学承担的修改《矿产资源法》的研究课题，强调矿业权应当纳入《物权法》，但课题内容中关于矿业权的特点、结构及法律关系的论述，又恰好是物权法所排斥的。以法理分析法论证了这种冲突缘自“矿业权”的虚无性，虚拟的权利多面体导致片面性认识。分解“矿业权”，将其重构为独立的矿产权和矿产开发权。矿产权可分别纳入物权法，矿产开发权属于公法性的《矿业法》调整。矿业权不但不能纳入物权法，而且其存在和创设属“违法”。     

利用磁信息追踪沉积物物质来源的定量方法

矿物磁性测量由于其具有简便易行、不带破坏性和用途多样性的特点已成为环境研究的一种新方法。本文以美国马里兰州罗德河流域为例,在自然物质磁性测量的基础上,运用聚类分析、多元回归分析和线性规划等方法,对沉积物来源进行了定量的估算。研定结果表明,河口湾沉积物来源组成具有明显的变化。这个变化与样芯的孢粉分析结果有惊人的吻合之处,反映了流域环境演变的历史。结果也表明,就一些实际问题而言,这种定量分析的方法比以前的定性描述方法更加实用和有效。     

《考工记》服饰染色工艺研究——试论"钟氏染羽"

《考工记》是成书于先秦时期的科技文化典籍,其中的《考工记.钟氏染羽》篇记载道:“钟氏染羽。以朱湛丹秫三月,而炽之,淳而渍之。三入为纁,五入为緅,七入为缁。”详细地描述了先秦的服饰染色工艺。虽然此处是针对染治鸟羽而言的,但其工艺技术和内在的文化意蕴却是和染布帛相同的,从侧面体现了先秦服饰艺术的伟大成就。     

矿产资源宏观价值的确定

提出一种新的确定矿产资源宏观价值的思路与方法 ,以改变其传统的“一事一议”的做法。文中分析与讨论了资源效益载体、基准价格、经济贡献等矿产资源宏观价值计算中的基本要素内涵。同时 ,还特别提出不同的效益资源载体状态下应予修正的看法。     

对资源税制度改革的思考

矿产品市场价格的持续上涨和矿业开发过程中资源浪费问题的屡禁不止,使得资源税制度的不足日益显现,以强化征收力度为核心的多项调整和试点改革措施,也因此被推出并引发了诸多争议。在对近年来各项资源税调整和试点改革措施回顾总结的基础上,系统分析了其所产生的正负效应及原因,通过总体评判,并结合我国矿业实际,阐述了资源税制度的改革方向及矿产资源有偿使用制度改革的长远目标,在考虑可行性的基础上设计了两种过渡性改革方案。     

敦煌鸣沙山砂质组成与结构

敦煌鸣沙山砂质为细砂,分选性中等,粒度分布负偏,峰态曲线尖窄.该区碎屑矿物中主要轻矿物为石英、斜长石、钾长石和方解石;主要重矿物有普通角闪石、绿帘石、阳起石、透闪石、褐铁矿、石榴子石和磁铁矿等.重矿物组合为普通角闪石+绿帘石,次圆状方解石是其特征矿物.鸣沙山石英颗粒磨圆度以次棱角状为主,棱角状次之,少量次圆状,极少圆状,由此推断其搬运距离较短,风化改造时间不长.石英磨圆度较差、颗粒间的空腔摩擦作用以及干旱的气候条件是响沙的原因.鸣沙山沉积物主要来源于研究区附近的变质岩系.鸣沙山的形成与该地受南、西、东三个主要风向的共同作用、南东两侧基岩山地阻挡以及区域内部干旱、河床干涸密切相关.     

Impact of recreational physical activity on bone mineral density in middle-aged men

Physical activity is known to exert beneficial effects on general health status of young, adult and elderly populations. Exercise (aside from genetic, hormonal, nutritional and pathological factors) also influences bone mineral density (BMD). Unfortunately, the association between physical exercise and BMD in adult population is controversial. Our aim was to assess relations between recreational physical activity and BMD in middle-aged men. We performed densitometry and hormonal measurements (total testosterone, free testosterone, dehydroepiandrosterone sulfate, estradiol) in a homogenous group of 38 subjects. Among them, we distinguished 22 who had not engaged in any physical activity, and 16 who had recreationally exercised for about 10 years. Both groups did not differ in regard to hormonal status. Similarly, densitometry did not reveal any statistically significant differences in BMD between both groups of men. Upon our observation, we can hypothesize that recreational physical activity does not affect bone mineral density in middle-aged men.     

The effects of daily alendronate,daily calcitonin and alendronate every other day on bone mineral density in osteoporotic men

Objectives. Biphosphonates have been widely used in the treatment of osteoporosis, but there is not enough data on their use in men. The aim of this study is to investigate the effects of twelve months' treatment with daily 10 mg alendronate, every other day 10 mg alendronate and daily 200 IU calcitonin on bone mineral density (BMD) in men with osteoporosis.

Materials and methods. 46 men with osteoporosis were randomly allocated to three groups: 15 patients in the first group received daily 10 mg alendronate and calcium (1000 mg/day), 14 patients in the second group used every other day 10 mg alendronate and calcium and 17 patients in the third group were given intranasal salmon calcitonin and calcium. At the baseline, sixth and twelfth months, BMD was measured at lumbar spine (L_2–4), femoral neck and Ward's triangle zone by means of dual energy X-ray absorptiometry (LUNAR).

Results. In daily and every other day alendronate and calcitonin groups there was a significant increase in BMD at lumbar spine (p = 0.004, p = 0.001, p = 0.04), but no difference at the femoral neck (p > 0.05) at the end of twelve months. When the groups were compared with each other, no significant differences in BMD levels at lumbar spine, femoral neck and Ward's triangle were found (p > 0.05).     

Arsenic exposure associated with decreased bone mineralization in male

Abstract

Objective: Arsenic (As) exposure may cause several medical problems. There were a few studies investigated whether it has affected bone tissue in women. However, there was no study in men. The aim of this study was to evaluate associations between bone mineral density (BMD) and As exposure in men subjects.

Material and methods: We enrolled in this study 254 subjects who due to chronic As exposure suspected and 82 subjects as a control group. Hair As levels were detected by a hair analysis (Varian AA240Z Zeeman Atomic Absorption Spectrometer, USA). BMD measurements were obtained using dual-energy X-ray absorptiometry instrumentation. We investigated associations between the hair As levels and BMD measurements.

Results: The frequency of osteoporosis and osteopenia was found to be 0.8% and 54.5%, respectively, in the As exposure group. The frequency of osteoporosis was found to be 1% and osteopenia was 32.4% in control subjects. There was significant difference between two groups (p?<?0.001). Hair As level has a median 1.01 (min: 0.06 and max: 25.71). There were no significant correlation between hair As levels and BMD measurements.

Conclusion: According to our observations, As exposure was associated with bone metabolism. Possible cause of osteopenia may be exposure to As. Further investigations are needed to estimate the relationship between As and bone metabolism.