福建省莆田市乌寨尖银矿地质特征及成因探讨

文章就位于永泰云山一石牛山早白垩世火山喷发盆地的南缘的莆田市乌寨尖银矿区矿地质特征、矿体地质特征、矿床成因进行了简要论述,为外围找银工作具有一定指导意义。     

养老产业细分市场相关研究综述

近年来,中国人口老龄化速度不断加快。同时随着社会的发展,老龄人群的收入水平增高,对生活质量的要求提高,中国养老产业蓬勃发展。养老产业包含各类市场,将其细分不仅能更好地满足老年人的需求,同时也能使养老产业迸发出新的活力。因此,通过对国内外文献的梳理总结,对养老产业进行细分,探讨细分市场之后对产业运营发展的影响,并对未来进行展望。     

Benchmarks in the spotlight: The impact on exchange traded markets

The Fix for precious metals is a global pricing benchmark that provides pricing and liquidity provision for market participants. We exploit the gradual change in the century old auction process to quantify the efficiencies related to more transparent pricing. Our focus is in the market impact of this change on exchange listed products. We find that reforms to the Fix have reduced quoted and effective bid-ask spreads and improved overall market depth. The results imply a positive spillover effect stemming from timelier and more accurate pricing information. The conditions under which we observe the benefits from transparency are related to product liquidity and the degree of market segmentation.     

Exchange Rates and Economic Recovery in the 1930s: An Extension to Asia

Scholars have found a positive relationship between the magnitude of currency depreciation and the extent of recovery from the Great Depression for Europe and Latin America. The relationship between currency depreciation and economic activity during the Great Depression for Asian economies has not yet been explored. This paper examines this topic using data from 13 Asian economies: China, India, Indonesia, Iran, Japan, Korea, Malaysia, the Philippines, Singapore, Taiwan, Thailand, Turkey, and Vietnam. We find that Asian economies responded in a similar way to currency depreciation during the Great Depression as did European and Latin American countries.     

纳米银的合成研究进展

近几年，纳米银的应用越来越广泛，成为金属纳米材料研究的热点。本文对应用微乳液法、模板法、相转移法、化学还原法、光化学法、超声波法、电化学法及辐射法等方法合成纳米银的研究进展进行了评述，对其发展趋势进行了展望。     

超顺磁性Fe3O4@Au核/壳纳米粒子的合成和特性

通过还原Au3＋到超顺磁性Fe3O4纳米粒子的表面,成功制备了具有超顺磁性的Fe3O4@Au核壳粒子。经透射电子显微镜（TEM）、X射线粉末衍射仪（XRD）、紫外可见分光光度计（UV-vis）、振动样品磁强计（VSM）和共焦显微拉曼仪对粒子进行表征,得到了具有核壳结构粒子,且表面被金壳覆盖。再以苯硫酚为探针分子,结果表明,磁性核壳结构的粒子显示出了优越的表面增强拉曼效应,这为超顺磁性的粒子在生物医学方面的应用创造了条件。     

水处理应用中纳米铁颗粒的制备方法综述

介绍了纳米铁颗粒的制备方法及其最新研究进展,包括气相方法、固相方法、液相方法及综合方法.每种方法各有优缺点,相互联合、取长补短才能实现商业化的要求.     

电池级纳米氧化钴的制备

研究了以氯化钴为原料,通过比较选择了价格相对低廉的碳酸氢铵代替草酸作沉淀剂制备前驱体,考察了反应温度、反应时间、氯化钴的浓度、碳酸氢铵溶液加料速度等因素对产品粒度大小的影响,从而得出最佳沉淀反应条件.在最佳反应条件下,制得的氧化钴产品平均粒径为200～300 nm,各项性能指标达到了Y级氧化钴国家标准的要求.     

某银矿原生矿选矿工艺研究

根据矿石性质,对广西某银矿原生矿开展工业选矿工艺研究,主要目的是验证实验室小试条件、流程及指标,提供合理的工业生产选矿工艺流程。这对有相似矿石性质的银矿工艺选择具有重要的借鉴和指导意义。     

EVIDENCE OF PURCHASING POWER PARITY IN SILVER‐BACKED MEXICO AND INDIA

This paper examines whether the theory of purchasing power parity (PPP) existed between Mexico and India for the period 1886–1910. It finds that despite not having a known trade relationship, PPP did hold. The explanation lies in the fact that these very different countries adhered to the silver standard far longer than most others – India through to 1893 and Mexico until 1905. The economic consequences of this adherence exposed both countries to similar international currency fluctuations that also provoked similar policy reactions within each country.