补充铜(Cu)元素的食疗方法

若缺铜,人早衰,细胞损,骨质败,既愚蠢,又笨傻,男变疯,女变呆,多贫血,多畸形,冠心病,又多患,易病危,易得癌,常见病,白癜风,胆固醇,速高升,应早治,不徘徊,食疗法,喜开怀.     

Miniaturized electrochemical sensors and their point-of-care applications

Most of the current analytical methods depend largely on laboratory-based analytical techniques that require expensive and bullky equipment,potentially incur costly testing,and involve lengthy detection processes.With increasing requirements for point-of-care testing(POCT),more attention has been paid to miniaturized analytical devices.Miniaturized electrochemical(MEC)sensors,including different material-based MEC sensors(such as DNA-,paper-,and screen electrode-based),have been in strong demand in analytical science due to their easy operation,portability,high sensitivity,as well as their short analysis time.They have been applied for the detection of trace amounts of target through measuring changes in electrochemical signal,such as current,voltage,potential,or impedance,due to the oxidation/reduction of chemical/biological molecules with the help of electrodes and electrochemical units.MEC sensors present great potential for the detection of targets including small organic molecules,metal ions,and biomolecules.In recent years,MEC sensors have been broadly applied to POCT in various fields,including health care,food safety,and environmental monitoring,owing to the excellent advantages of electrochemical(EC)technologies.This review summarized the state-of-the-art advancements on various types of MEC sensors and their applications in POCT.Furthermore,the future perspectives,opportunities,and challenges in this field are also discussed.     

常温常湿条件下Au/MeO~x催化剂上CO氧化性能

利用共沉淀法制备了Au/MeO~x催化剂(Me=Al,Co,Cr,Cu,Fe,Mn,Ni,Zn)。在常温常湿条件下,考察了不同氧化物负载的金基催化剂的CO氧化性能。结果表明,氧化物种类对催化剂的活性和稳定性均有较大的影响。Cu,Mn,Cr等氧化物负载的金基催化剂的活性较差,而Zn,Fe,Co,Ni,Al等金属氧化物负载的金基催化剂可将CO完全氧化,又具有一定的稳定性,在相同反应条件下,CO完全转化时的稳定性顺序为Au/ZnO>Au/α-Fe~2O~3>Au/Co~3O~4>Au/γ-Al~2O~3≈Au/NiO。还发现水对Au/MnO~x催化剂的活性和稳定性有负作用,而对180℃焙烧制备的Au/ZnO-180催化剂的活性和稳定性均有明显的湿度增强作用。     

CXN天然沸石的研究2: 吸附性质

采用N~2,NH~3,CO~2,乙烯,丙烯,水,甲醇,乙醇,丙醇等作为吸附剂,研究了由我国CXN天然沸石改性制得的H-STI和Na-STI沸石的吸附性质,H-STI和Na-STI沸石的BET表面积及微孔孔体积约为420m^2/g和0.20m^3/g。根据NH~3和CO~2在H-STI沸石上的吸附等温线计算得到它们的吸附热分别为44.8和26.5kJ/mol。乙烯,丙烯,甲醇,乙醇,丙醇等在Na-STI沸石上的吸附等温线表明该沸石对有机分子的吸附具有链长选择性。在低分压下水相对于甲醇的吸附量表明沸石具有一定的疏水性质。     

ACTA PHYSICO-CHIMICA SINICA

The journal has been indexed in SCIE,CA,SCOPUS,AJ,JICST,and CSTPCD.The average publication time is 71 days for the web version and 139 days for the printed version in 2014Scope of the Journal1)THERMODYNAMICS,KINETICS,AND STRUCTURAL CHEMISTRY(chemical equilibrium and thermodynamic parameters,calorimetry,nonequilibrium thermodynamics and dissipative structure,statistical thermodynamics,macrokinetics,molecular dynamics,ultrafast dynamics,excited states,     

Information for authors

正Chinese Chemical Letters(CCL)(ISSN 1001-8417)was founded in July 1990.The journal publishes preliminary accounts in the whole field of chemistry,including inorganic chemistry,organic chemistry,analytical chemistry,physical chemistry,polymer chemistry,applied chemistry,etc.,     

巧制无水硫酸铜

在中学化学实验中,通常用无水硫酸铜来检验少量水的存在,然而,无水硫酸铜的吸湿性很强,需要时现制现用.制取无水硫酸铜时,通常将硫酸铜晶体放在蒸发皿中用小火慢慢加热并用玻璃棒不停搅拌,往往由于加热时温度稍高便有少量硫酸铜分解,使得一部分变黑,而且易结块,操作比较麻烦,而笔者为了克服以上缺点,不需加热便能巧妙制得无水硫酸铜,不但操作简单,而且实验效果明显.     

稀土配合物导数吸收光谱的研究III.稀土离子-钛铁试剂配合物高阶导数光谱的研究及应用

研究了稀土离子-钛铁试剂水溶液体系的三阶及四阶导数光谱.在0.05-0.3mol.dm^-^3氢氧化钠溶液中,镨,钕,钐,镝,钬,铒,铥与钛铁试剂形成具有f-f跃迁吸收光谱的配合物.在紫外及可见区域内,它们各自有特征的吸收峰.其高阶导数光谱不仅灵敏度比常规吸收光增大了许多倍,且选择性也有很大的提高.如以峰-峰法测量四阶导数光谱,铒的导数摩尔吸光系数已达3.2x10^3L.moL^-^1.本文拟定了用稀土离子-钛铁试剂体系高阶导数光谱法测定混合稀土中镨,钕,钐,镝,钬,铒,铥的简便方法.和同类方法相比,本法具有灵敏度高,分析元素多,不需任何分离步骤和使用有机溶剂等优点.     

天然海水中绿色碳钢缓蚀剂的研究

根据分子设计和官能团剪裁方法,结合有机缓蚀剂分子在金属表面和氧化膜表面的配位理论,选择葡萄酸钙,葡萄糖酸锌,硫酸锌,蒜素,丙烯酸聚合物,椰子油基烷醇酰胺,APG,OCTA,多聚磷酸钠等多种缓蚀剂成分,利用极化曲线法和重量法研究了上述缓蚀剂复配后对海水中碳钢的缓蚀作用,并由正交实验对筛选出的葡萄酸钙,硫酸锌和OCTA研究确定其以及相互之间的最佳复配比和协同效应,然后通过分段实验法再研究其最佳配方的后效能性,从而得到一种可生物降解的无磷高效绿色缓蚀剂.     

中国的泥土疗法：美容篇（Ⅲ）

从古代矿物美容的文献记录,现代化妆品原料的演变和当代泥土美容的功效特点3个方面阐述了纯天然矿物美容的历史,地位和意义,并详细解析了29种泥、土、玉、石的物理特征、化学组成和养颜功用。章节如下：1．内外兼修的中国古代矿物美容术,包括：文献记述,用法举例,炮制与解毒,元素与美容。2．返朴归真的现代泥石美容术,包括：现代化妆品的发展趋势,第五代化妆品的特征。3．泥疗美容,包括：火山泥（海南火山矿泥、绿迪矿泥、五大连池矿泥、天行山土乳矿泥）,运城死海泥,秀山滩涂海泥,青海圣湖黑泥,海藻泥。4．土疗美容,包括：绿泥土壤,红泥土壤,膨润土,海泡石黏土,伊利石黏土,高岭土,凹凸棒土,硅藻土,赤石脂。5．玉疗美容,包括：翡翠,软玉,琥珀,珍珠,黑曜石,寿山石。6．石疗美容,包括：麦饭石,累托石,蒙脱石,滑石,玄武石,砭石。本文第1～4章已分别刊于第4、5期,本期刊出第5章。