对羟基苯甲酸酯钠盐在调味品中的应用

长期以来,人们普遍认为对羟基苯甲酸酯是一种广谱、高效、安全的防腐剂。但是对羟基苯甲酸类酯的水溶性差,因此其应用范围受到一定的制约。本文所论述的对羟基苯甲酸酯钠盐仍然保持着与其相对应的酯的优良性能,且水溶性好,具有广泛的应用前景。     

南京市基础设施投融资体制改革探讨

研究目的:以南京市为例,探讨中国城市基础设施建设中的投融资改革.研究方法:实证分析法.研究结果:南京市城市建设投融资体制的主要问题是投资主体单一(政府),筹资和融资渠道狭窄,民间资本份额过低,融资渠道不畅.研究结论:利用项目区分的原理深化改革城市基础设施的投融资体系.建议:(1)转变政府职能,政企分开;(2)积极培育投资主体,多方吸引社会资金;(3)完善土地储备制度,提高政府财政收入;(4)城市资产管理市场化;(5)产品和服务价格市场化.     

2012年澳网李娜vs小克技术统计分析

通过对2012年澳网女子单打李娜对阵克里斯特尔斯的比赛情况分析,从中找出其在比赛中的优势与不足,并提出改进措施,旨在为我国女子网球技术训练和发展提供参考。     

原子吸收法连续测定硅酸盐中六种元素

该文报道了采用ＨＦ—ＨＣＬＯ＿４溶液溶解样品，原子吸收法连续测定硅酸盐中Ｆｅ、Ｃａ、Ｍｇ、Ｍｎ、Ｎａ、Ｋ六种元素，考察了共存元素的干扰及消除方法，试样溶液介质的选择，分析结果令人满意。     

用填料塔处理碳酸钠包装粉尘

通过采用吸尘罩—填料塔—脱水塔—排放的湿法工艺流程及有关参数的选择,对碳酸钠包装车间粉尘进行处理,处理后包装车间空气粉尘浓度和处理后的排放气体的粉尘浓度均符合国家标准。     

广西隆安县“那”文化及其产业构想

隆安县具有悠久的“那”文化历史,先民创造了丰富的“那”文化,留下许多独特的“那”文化遗存与习俗。抓住国内文化产业大发展的机遇,充分利用当地“那”文化资源和“那”文化遗存,大力发展“那”文化产业,促进当地社会文化和经济建设又好又快发展。     

(K_(0.5)Na_(0.5))NbO_3陶瓷高频介电性能研究

以传统电子陶瓷工艺制备了致密性较好的(K0.5Na0.5)NbO3陶瓷。研究了(K0.5Na0.5)NbO3陶瓷在低频及高频的介电性能。结果表明:在低频和高频,(K0.5Na0.5)NbO3的介电性能随频率的增加而减小;在高频,介电损耗随频率的增加先增加后减小。(K0.5Na0.5)NbO3陶瓷在高频(8-18GHz)时的介电常数实部,虚部及介电损耗分别为150-430,5-110和0.07-0.28。     

ICP测定土壤中的K,Na,Ca,Mg,Fe

本论文采用等离子体发射光谱法(ICP-AES)土壤中的K,Na,Ca,Mg,Fe进行了测定,样品以四酸体系溶矿,不经分离杂质,即可直接测定。本法通过优化实验条件确定了最佳分析波长,该测定方法检出限为:0.006~0.0186mg/ml,RSD%为:0.5032%~1.030%,双差均小于1,回收率为99.41%~100%。准确度和精密度较高,方法快速简单,预处理简单,分析流程短,完全满足地质工作要求。     

ICP-AES法测定磷矿砂中Fe2O3、Al2O3、MgO、Na2O、SrO、MnO含量

[目的]建立同时测定各种磷矿中Fe、Al、Mg、Na、Sr、Mn含量的方法.[方法]用王水溶样法或氢氟酸-高氯酸金溶法溶解磷矿砂试样,用电感耦合等离子体原子发射光谱仪(ICP-AES)同时测定Fe2O3、Al2O3、MgO、Na2O、SrO、MnO含量.[结果]本方法具有较好的准确性和精密度.[结论]本方法同样适用于磷矿石、磷矿、磷铁矿和磷土矿等,测定范围为,Fe2O30.1%～8%;Al2O30.10%～4%;MgO0.1%～10%;Na2O＞0.015%;SrO＞0.015%;MnO＞0.015%.     

Management disclosure bias and audit services

This paper considers the level of bias observed in management disclosures of earnings forecasts and historic earnings data in Australian prospectuses. Management forecasts and naïve forecasts derived from managements’ normalised historic data are analysed. A key focus is upon the possible association between such forecast bias and differential audit services performed upon the data. Audit firm size and level of engagement are modelled against bias. The full sample revealed no overestimation bias for any of the forecast models, but underestimation was observed for elements of the management and random walk naïve forecasts. Cross-sectionally, a significant association was observed between forecast bias and audit firm size across all three forecast models. Specifically, the audit firm size variable (Non Big-5/Big-5) was inversely associated with the extent to which forecasted and normalised historic earnings data were upwardly biased. On the other hand, the level of engagement was not a significant discriminator for forecast bias. These outcomes are contrasted against others reported elsewhere in the literature and suggest a risk in generalising across contexts. The findings imply a level of ‘disclosure management’ regarding company IPO forecasts and normalised historic accounting data, with forecast overestimation and error size more extreme when the monitoring expertise and/or reputation of auditors is lower (JEL D80, G14, M41, N27).