THE MISCONCEPTION OF ONLINE COMMENT THREADS

Web 2.0 has opened the gates to journalism for online audiences which increasingly participate in the production, dissemination and response processes of news. Comment threads in particular have grown exponentially in recent years as readers have embraced the opportunity to bypass the Letters' Editor and publish their opinions directly to a newspaper website. This rise in participatory journalism has led to new challenges for journalists as they have strived to negotiate the often murky waters of user-generated content. To date, research in this field has been mostly limited to national and international news websites despite local news providers having a close connection and engagement with their communities. This paper therefore seeks to fill this gap partially by analysing the content of comment threads on two British local newspaper websites via a content analysis, while also exploring the experiences of journalists via news room observation and interviews. A contradictory picture emerges whereby journalists accept with some reluctance that comment threads possess a democratic function but one which is potentially damaging to the brand as well as resource intensive. This is juxtaposed by more positive findings that reveal buoyant levels of interactivity between readers in comment threads together with a thirst for engagement in public affairs.     

Effect of oral ingestion of different forms of silver on tissue content of some essential elements in chicks

Silver is ingested in India in the form of varak, Ayurvedic bhasm and water contained in silver utensils, but nobody knows their effects. We have examined the effect of interaction of silver ingested in the form of varak (leaf), bhasm (ash) and water (colloidal solution) on some essential elements (Na, K, Ca, Mg, Cu, Fe and Zn) in blood, liver, spleen and kidneys of chicks. The results showed significant rise of silver in all the tissues and significant fall in copper in the blood. The greatest rise was obtained in blood silver by silver sol while it had the lowest amount of silver. Iron significantly increased in tissues but somewhat decreased in blood. Zinc content increased in all the tissues by leaf and ash but decreased by sol. No consistent pattern was seen in case of other elements.     

锌基铝铜合金中铁和铜的测定

锌基铝铜合金试样用硝酸溶解,其中铁的测定是移取0．05g试样液,用盐羟胺将Fe^3 还原为Fe^2 ,于PH4-5时,Fe^2 与邻二氮菲生成红色络合物．为消除基体Zn及大量铜的干扰,采用加过量的邻二氮菲及延长显色时间,得到了准确的分析结果。铜的测定采用新铜试剂及DDTC-Pb两种方法对照分析试验,在本试验确定的条件下分析标样,得到准确结果。标样分析选取率为100%。测定范围：Fe0．01～0．1%;铜0．1～3．0%。通过标样定位分析结果表明本试验所确定的分析方法具有准确度高、灵敏度适宜、重现性好,能满足锌基铝铜合金产品分析的需要．     

Copper(II) hydroxide on artefacts: Corrosion,conservation, colourants

Copper(II) hydroxide (as the rarely occurring mineral spertiniite) is formed under alkaline, oxidising conditions. It has been observed as a naturally occurring corrosion product of brass in sea water. But most occurrences on copper alloys are due to conservation treatments using basic solutions (sodium hydroxide or ammonia) or to intentional patination. Classical brass centrepieces (c. 1800), ‘cleaned’ with ammonia solution, developed a blue spertiniite patina in gaps, where evaporation was hindered. Additional to the danger of stress corrosion cracking this is another reason now outlawing this treatment. Copper pigment layers will transform to copper hydroxide when exposed to bases. The treatment of basic copper salts with bases has been used intentionally in the production of Bremen blue and similar pigments which can be composed of copper hydroxide as well.     

Oxidative stress and antioxidant status in cervical cancer patients

Cervical cancer (CaCx) is a global public health problem as it is the second most common cancer leading to the death of women worldwide. Many references revealed that the low levels of antioxidants induce the generation of free radicals leading to DNA damage and further mutations. In the present study attempt have been made to evaluate the levels of serum Lipid peroxide, Nitric Oxide (NO^.) Erythrocytic—Superoxide Dismutase (RBC-SOD), Vitamin-C, serum Copper (Cu) and serum Zinc (Zn). 120 patients were divided in 4 groups according to the increasing CaCx stages i.e. stage I, II, III & IV respectively. All the patients were around the age group of 25–65 years. 30 healthy women between the same age group were treated as controls. Highly significant increased values of MDA, NO^. and Cu were observed (p<0.001) whereas the activity of RBC-SOD, levels of Vitamin-C and Zn were significantly decreased in CaCx patients as compared with healthy controls (p<0.001). Cu/Zn ratio was found to be altered in CaCx patients. From our findings it can be concluded that the oxidative stress is induced among CaCx patients, which inturn increases the risk of CaCx.     

Cu与浓H_2SO_4反应黑色沉淀成份的实验验证

Cu与浓H2SO4反应有黑色沉淀产生,本文通过实验验证对黑色沉淀物的组分作一定     

化合物[Cu（I）2（L）2（HL）2]2（H4Mo8O26）（I）（L：3-（2’-吡啶基）吡唑）（I）的合成和结构表征

通过水热合成方法,得到一个新的化合物：化合物[Cu（I）2（L）2（HE）2]2（H4Mo8O26）（I）（L：3-（2’-吡啶基）吡唑）（I）。单晶衍射数据显示,化合物I是由双核单元Cu（I）2L2（HL）2和ε-[H4Mo8O26]簇组成。Cu（I）2L2（HL）2具有中心对称性,其中铜离子被有机配体3-（2＇-吡啶基）吡唑的2位氮原子和吡啶氮原子螯合。同时,3-（2’-吡啶基）吡唑的1位氮原子连接另外一个金属铜离子。由此形成了一个CuNNCuNN六边形结构,两个铜的距离为3．907A。晶体数据：C32 H28Cu2Mo4N12O13,Mr=1299．50,Triclinic,P—1,a=12．388（3）,b=12．893（3）,c=15．408（3）A,V=2125．8（11）A^3,Z=2,Dc=2．030g／cm^2,F（000）=1268,μ=2．202mm^-1,R1=0．0214 and wR2=0．0584[I〉2σ（I）]。     

基于JSP的跨库检索技术的研究开发

针对用户如何同时对多个数据库进行检索的问题，本文讨论了JSP技术同其它几种技术比较所具有的优点，同时也介绍了系统开发所选择的模型和原理以及Java的多线程技术。     

试论马援南征的意义(马援研究之八)

根据史实、史料客观地论述了马援南征的历史意义：推动了汉代广西地区郡县制发展;勘定了汉代国家南部边疆;促进了广西古代各民族的团结。     

铜锍吹炼过程中耗氧量的计算

提出以氧气利用率作为铜锍吹炼生产过程节能降耗的重要指标之一，并对整个吹炼生产过程中的耗氧量进行计算。