银水垄银铅锌矿地质特征及远景预测

银水垄矿区位于邵阳—郴州深大断裂带与炎陵—长城岭大断裂带的交汇部位,区内NW-NWW向断裂构造经历了从加里东期到燕山期的多次构造变动,为区内主要控矿容矿构造.本区岩浆活动频繁,燕山早期形成的瑶岗仙黑云母花岗岩为具多次侵入活动的酸性-超酸性铝过饱和钙碱系列复式岩株,岩体中富含W、Sn、Pb、Zn、Cu等成矿元素,为矿床的形成提供了丰富的物质来源.在论述矿床地质特征的基础上,进一步阐述了矿床的控矿因素、富集规律及找矿标志,对矿区作出了远景预测.

纳米银水悬浮液抗菌材料的研制

本文全面综述纳米银无机抗菌剂的研究现状,并着重指出其在医疗、保健、生殖健康、计划生育及生活中各种作用,介绍纳米银水悬浮液的研制情况。

纳米银水悬浮液抗菌材料的研制

银是一种安全的广谱性杀菌材料。综述了抗菌剂的分类和特性，介绍了纳米银水悬浮液的制备方法、抗菌机理，以及生产工艺流程及特点，分析了其社会效益及推广前景，重点指出其在医疗、保健、生殖健康、计划生育及生活中的作用。

银水水库除险加固工程方案

文章通过对银水水库现场细致踏勘,找出病险原因的论述,提出了针对各枢纽建筑物除险加固的科学治理方案。工程实施后基本解除了各枢纽建筑物的病险,达到了除险加固的目的。

走马金山银水间

阿尔泰山,位于祖国版图最西北端的中、俄、哈、蒙4国交界处,是闻名遐迩的"金山". 发源于阿尔泰山中的额尔齐斯河,流经哈萨克斯坦、俄罗斯注入北冰洋,有"银水"之美称. 农十师垦区的各农牧团场,像粒粒珍珠洒落在"金山""银水"间. 翻开农十师的屯垦史,无不与共和国的命运息息相关:农十师在剿匪的枪炮声中诞生,在"伊塔"事件中扩编,在改革大潮中发展壮大.半个多世纪以来,农十师人自强不息,无私奉献,忠实地履行着党和国家所赋予的屯垦戍边的历史重任,守卫着祖国西北的边境线. ……

Hydrothermal synthesis of silver nanoparticles in Arabic gum aqueous solutions

Finely divided silver nanoparticles were synthesized via the hydrothermal method. Arabic gum （AG） was used as both the reductant and steric stabilizer without any other surfactant. By adjusting the reaction temperature, mass ratio of AG to AgNO3, and reaction time, silver nanoparticles with different morphological characteristics could be obtained. The products were characterized by UV-Vis, FTIR, TEM, SEM, and XRD measurements. It was found that temperature and AG played an important role in the synthesis of mono-disperse silver nanoparticles. Well dispersed and quasispherical silver nanoparticles were obtained under the optimal synthesis conditions of 10 mmol/L AgNO3, m（AG）/m（AgN03）= l：1, 160 ℃ and 3 h.

明清小说中“水手”指称银钱义来自于“水手银”

明清白话小说中有一个可以指称银钱的词语——"水手",现有的研究认为这是一种隐语表达。其实,这种用法是由"水手银"一词简缩而来,并非隐语。

Ag Deposition Forms and Uniformity on Porous Silicon by Electrochemical Method

The electrochemical deposition technique was applied to achieve porous silicon （PS） surface passivated with Ag deposition for improving the properties of PS photoluminescence. The relation of Ag depositing forms to current density and the effect of PS hydrophilic surface on deposition uniformity were investigated. The experimental results indicated that there were two critical current densities （maximum and minimum） in which Ag was absent and electroplated on PS surface correspondingly, and the range of current density for deposition of Ag on porous silicon was from 50 μA/cm^2 to 400 μA/cm^2. The process of changing PS surface from hydrophobic into hydrophilic had positive effect on Ag deposition uniformity. Under the same experimental conditions, PS hydrophobic surface presented uneven Ag deposition.However, hydrophilic surface treated with SC-1 solution was even. Finally, the effect of PS surface passivation with Ag even deposition on photoluminescence intensity and stabilization of PS was studied. It was discovered that Ag passivation inhibited the degradation of PL intensity effectively. In addition, excessive Ag deposition had a quenching effect on room-temperature visible photoluminescence of PS.

Preliminary Study on Water Physiological Characters of Male and Female Ginkgo biloba L.

[Objective] The experiment aimed to study the difference of water physiology of male and female Ginkgo biloba L. for discussing the strategy of water utilization as well as the important role of this difference during evolution process. [Method] The stem sap flow, stomatal conductance(Gs), transpiration rate(Tr) and water use efficiency (WUE) of male and female Ginkgo biloba L. were comparatively studied. [Result] The day-night processes of flow on male and female Ginkgo biloba L. were similar. The flow on male and female Ginkgo biloba L. in day were almost same while the flow at night on male Ginkgo biloba L. was bigger than that on female Ginkgo biloba L. The Tr and Gs of male and female Ginkgo biloba L. were high in morning and at night but low at noon ,while Tr and Gs of female Ginkgo biloba L. in morning and at night were higher than these of male Ginkgo biloba L. at the same time point. However, these indexes of female plant were lower than these of male plant from 11:00 to 14:00. WUE changing trends of male and female Ginkgo biloba L. were similar, while average water utilization rate of female Ginkgo biloba L. was slightly lower than that of male Ginkgo biloba L. [Conclusion] Compared with other companion plants, water physiology of male and female Ginkgo biloba L. had strong homoplasy. The phenomenon might be a survival strategy of dioecious plants under long term evolutionary pressure.

从腊月八民谣谈武山祈福文化

武山腊八节的民间歌谣，形象地反映了民众对腊八节的参与和重视，也蕴藏着大量的祈福深意。诸如“惜福感恩”“担水进财”“五谷丰登”“除旧迎新”等。

Annual Time-series Analyses of Total Gaseous Mercury Measurement and its Impact Factors on the Gongga Mountains in the Southeastern Fringe of the Qinghai-Tibetan Plateau

Long-term monitoring programs for measurement of atmospheric mercury concentrations are presently recognized as powerful tools for local,regional and global studies of atmospheric long-range transport processes,and they could also provide valuable information about the impact of emission controls on the global budget of atmospheric mercury,their observance and an insight into the global mercury cycle. China is believed to be an increasing atmospheric mercury emission source. However,only a few measurements of mercury,to our knowledge,have been done in ambient air over China. The highly-time resolved atmospheric mercury concen-trations have been measured at Moxi Base Station (102°72′E 29°92′N,1640 m asl) of the Gongga Alpine Ecosystem Observation and Experiment Station of Chinese Academy of Sciences (CAS) from May 2005 to June 2006 by using a set of Automatic Atmospheric Mercury Speciation Analyzers (Tekran 2537A). Measurements were carried out with a time resolution of every 15 minutes. The overall average total gaseous mercury (TGM) covering the measurement periods was 4±1.38 ng·m-3 (N=57310),which is higher than the global background level of approximately 1.5～2.0 ng·m-3. The measurements in all seasons showed a similar diurnal change pattern with a high concentration during daytime relative to nighttime and maximum concentration near solar noon and minimum concentration immediately before sunrise. The presence of diurnal TGM peaks during spring and summer was found earlier than that during autumn and winter. When divided seasonally,it was found that the concentrations of TGM were highest in winter with 6.13 ± 1.78 ng·m-3 and lowest in summer with 3.17 ± 0.67 ng·m-3. There were no significant differences in TGM among wind sectors during each season. Whereas Hg generally exhibited significant correlations with the parameters,such as temperature,saturated vapor pressure,precipitation,ultraviolet radiation (UV) and atmospheric pressure at the whole measurement stage,and the correlations varied seasonally. Our results suggest that the local or regional abundant geothermal activities,such as thermal spring,anthropogenic source processes and changes in meteorological conditions,regulate and affect Hg behavior in the study area.

Adsorption of Hg(Ⅱ) from aqueous solution using thiourea functionalized chelating fiber

A fast and selective adsorbent for Hg（ll） from aqueous solutions using thiourea （TU） functionalized polypropylene fiber grafted acrylic acid （PP-g-AA）, PP-g-AA-TU fibers, was characterized by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. The adsorption behavior of the functionalized chelating fibers for Hg（Ⅱ） was investigated by static adsorption experiments, and the effects of some essential factors on adsorption of Hg（Ⅱ） were examined, such as pH, initial concentration, adsorption time, coexisting cations, and temperature, The results showed that the adsorptive equilibrium could be achieved in 10 min, and the equilibrium adsorption quantity of PP-g-AA-TU fibers was 20 times that of PP-g-AA fibers. The PP-g-AA-TU fibers showed a very high adsorption rate and a good selectivity for Hg（Ⅱ） over a wide range of pH. The adsorption isotherm can be well described with Langmuir model, with the maximum adsorption capacity for Hg（Ⅱ） up to 52.04 mg.g-1 and the removal of Hg（Ⅱ） more than 97%. The kinetic data indicate that the adsorption process is best-fitted into the pseudo-second-order model.

Deformities in silver pomfret Pampus argenteus caught from Kuwait waters

During sampling for spawning stock of the silver pomfret,Pampus argenteus in Kuwait waters,a few seriously deformed individuals were captured.These individuals had been attacked and wounded,but had healed and survived.The fish body deformities are believed to be caused by predation attempts on silver pomfret by predators such as sharks,groupers,and croakers.

Surface chemical characterization of deactivated low-level mercury catalysts for acetylene hydrochlorination

Mercury-containing catalysts are widely used for acetylene hydrochlorination in China. Surface chemical characteristics of the fresh low-level mercury catalysts and spent low-level mercury catalysts were compared using multiple characterization methods. Pore blockage and active site coverage caused by chlorine-containing organics are responsible for catalyst deactivation. The reactions of chloroethylene and acetylene with chlorine free radical can generate chlorine-containing organic species. SiO_2 and functional groups on activated carbon contribute to the generation of carbon deposition. No significant reduction in the total content of mercury was observed after catalyst deactivation, while there was mercury loss locally. The irreversible loss of HgCl_2 caused by volatilization, reduction and poisoning of elements S and P also can lead to catalyst deactivation. Si, Al, Ca and Fe oxides are scattered on the activated carbon. Active components are still uniformly absorbed on activated carbon after catalyst deactivation.

The pore structure of tight limestone-Jurassic Ziliujing Formation, Central Sichuan Basin, China

The pore structure of the tight limestone in the Daanzhai Member of the Ziliujing Formation, Jurassic System, in central Sichuan Basin, China, is complex but essential to the exploration and development of tight oil. The pore structure of the tight limestone is studied by using scanning electron microscopy （SEM）, nitrogen adsorption, high-pressure mercury intrusion, and nuclear magnetic resonance （NMR）. The experimental results suggest that the pores are mainly slit pores and mesopores and macropores contribute to the pore volume and specific surface. The displacement pressure, average pore size, and homogeneity coefficient correlate with porosity and permeability and can be used to evaluate the pore structure. The full pore-size distribution was obtained by combining nitrogen adsorption and high-pressure mercury intrusion. We find that the limestone mainly contains mesopores with diameter of 2-50 nm. The T2 distribution was converted into pore-size distribution, well matching the full pore-size distribution. The relation between T2 and pore size obeys a power law and the geometric mean of T2 correlates with the pore structure and can be used in the pore structure evaluation.

Migration of silver nanoparticles in an aquatic system with Eichhornia crassipes

The migration and dissolution of AgNPs in an aquatic system with plants was investigated.By using a hydroponic system with Eichhornia crassipes,the absorption and transportation processes of silver nanoparticles were investigated.The results show that AgNPs concentrations in the water phase declined with the increase in time,and the reduction degree was dependent on the initial concentrations of AgNPs.The silver concentrations in the roots(r=0.98,p<0.05),stems and leaves(r=1,p<0.001)were significantly positively correlated with the initial concentrations of AgNPs.Silver nanoparticles accumulated in plant roots more than stems and leaves.Compared with the addition of AgNO 3 at identical concentrations,lower removal rates of silver and plant uptake were observed in the AgNPs stress systems.A significant positive correlation was also found between the initial AgNPs concentrations and the removed amount of silver(r=0.99,p<0.001).For AgNPs,the primary removal mechanisms in these aquatic systems were agglomeration and sedimentation,while the absorption by plants had a relatively weak contribution.

A model of Korotkoff sounds method electronic sphygmomanometer equivalent to the mercury one

Mercury sphygmomanometer (MSM) is reliable and widely used in clinics and hospitals. The principle of Korotkoff sounds method (KSM) applied in the MSM is also a gold standard to measure blood pressure. Many efforts have been made attempting to replace MSM, which is criticized for being not healthy and safe. In this research, an electronic blood pressure monitor, named K-sounds electronic sphygmomanometer (KESM), was designed as a substitute to MSM. The three key elements of KSM were proposed for the first time. We used appropriate electronic components to build the KESM which can fulfill the functions related to the three key elements. The KESM, which was easy to operate and free of mercury, followed the same principle as MSM. The same principle guaranteed the comparable accuracy. We took equivalence test and the results showed that the designed KESM was as accurate as the calibrated standard MSM. The designed KESM passed the certifications of SFDA and is qualified in clinics or hospitals for diagnostic purposes.

Mercury distribution in the Jiaozhou Bay

The Jiaozhou Bay is a semi-enclosed bay, Qingdao, China. More than 10 rivers enter the bay, of which most take wastes from industrial and household discharges. According to historical seasonal investigations in May, August, November 1979, the content, distribution, and development of heavy metal mercury are analyzed as a historical reference. Water samples were taken from the surface and bottom. The results revealed clear seasonal and regional changes in both horizontal and vertical directions, and close relation with major discharging rivers and plankton production. The seawater was polluted more seriously in spring than in any other seasons. However, it was the cleanest in winter during which least waste was input with low plankton production. According to historical data, the state of mercury pollution in seawater was worsening in the period, and has been improving in recent years. Terrestrial contamination was the main reason for mercury pollution in the bay.