Isolation and Identification of Antioxidative Active Component from Total Flavonoids of Mimenghua

In this study, bioassay-guided isolation, identification and biological evaluation of antioxidant components from total flavonoids of Chinese herbal plant Mimenghua were performed. 1, 1-Diphenyl-2-picrylhydrazyl (DPPH) radical scavenging test was adopted as the bioassay-guided method, Sephadex LH-20 column chromatography and high performance liquid chromatography were used as the purification tools for the acquisition of antioxidant components. One compound was obtained and identified as acteoside by its physicochemical properties and spectral characteristics. Antioxidant activity in vitro of acteoside was determined by evaluation of the scavenging activity on DPPH radical and hydroxyl radical, reducing power and total antioxidant capability.The results showed that acteoside had significant antioxidative activity and possessed higher activity with the increase of concentration,which provides the potential application of acteoside in food, pharmaceutical and cosmetic industries.     

Effect of Organic and Inorganic Phosphorous on Growth of Roselle(Hibiscus sabdariffa L.)

To investigate the performance of organic and inorganic phosphorous on growth of Roselle(Hibiscus sabdariffa L.),an experiment was carried out at Newly Developmental Farm(NDF),Horticulture Section,the university of Agriculture Peshawar,Pakistan,during 2012.The experiment was laid out in a Randomized Complete Block Design(RCBD) with split plot arrangement and replicated three times.The chemical fertilizer Single Super Phosphate(SSP) was used as inorganic source of phosphorus,while Organic Phosphate(OP) from organic product produced by Niha corporation containing 20%organic mineralized P_2O_5,was used as the source of organic phosphorous.Both the sources of fertilizer were applied at the rate of 10,20,30 40 and 50 kg · hm~(-2) and control.The statistical analysis of data revealed that both the sources and levels of phosphorus significantly affected most of the growth parameters of Roselle except germination percentage and survival percentage.Plant height(112.09 cm),numbers of leave plant~(-1)(177.87),numbers of branch plant~(-1)(4.08),leaf areas(126.60 cm~2),days to flowering(142.83),fresh flower weight(2.56 g),fresh calyx weight(1.70 g),dry calyx weight(0.43 g),numbers of calyces(94.10),numbers of root plant~(-1)(11.03),root length(22.67 cm)and root weight(27.50 g) were observed in plants fertilized with organic source of phosphorous.Phosphorous levels significantly affected all of the parameters except germination percentage and survival percentage.The maximum plant height(124.39 cm),numbers of branches(5.32),numbers of leave plant~(-1)(204.89),leaf areas(148.14 cm~2),fresh flower weight(3.32 g),fresh calyx weight(2.04 g),dry calyx weight(0.51 g),numbers of calyces(105.30),numbers of root plant~(-1)(12.78),root length(24.50 cm) and root weight(29.94 g) were observed in plants fertilized with 40 kg·hm~(-2) phosphorous and the maximum numbers of days to flowering(148.17) were observed in the control plants.It was concluded from the experimental results that organic phosphorous at the rate40 kg·hm~(-2) would be used for better production of Roselle under agro-climatic condition of Peshawar.     

福建诏安湾春、秋季鱼卵和仔稚鱼种类组成及数量变化

2012年10月和2014年5月在诏安湾海域进行了鱼卵、仔稚鱼的调查,对诏安湾秋季和春季的鱼卵和仔稚鱼的种类组成、数量和分布进行了研究。结果表明,本调查海域共鉴定的鱼卵7种、仔稚鱼7种,隶属于10科10属;秋季共采集到鱼卵31个和仔稚鱼47尾,密集区出现在湾口的西屿北侧海域,春季共采集到鱼卵662个和仔稚鱼69尾,密集区主要分布在诏安湾中部偏北海域和湾口西屿西侧海域。秋季主要优势种为隆头鱼科鱼类、美肩鳃鳚,春季主要优势种为黄姑鱼、红鳍笛鲷和美肩鳃鳚。与东山湾相比,春季诏安湾鱼卵密度明显较大、仔稚鱼资源密度略低;秋季两个海湾的鱼卵、仔稚鱼数量均处于低水平;两个海湾的产卵时期主要在春季。     

浅析我国环境管理体制中存在的问题

近几十年,我国市场经济繁荣发展,但与之形成鲜明对比的是日益恶化的环境,环境问题成了亟待解决的难题。国家（地区）在环境管理中起着至关重要的作用,国家（地区）行使着环境管理权,但我国的环境管理体制还存在诸多问题,需要借鉴西方先进的环境管理体制,发挥我国环境管理的特色。     

浅谈国有建筑施工企业经营管理体制创新的重要性

经营管理是企业永恒的主题。企业核心竞争力的提高有待于经营管理机制的创新,企业通过经营管理创新,形成新的动力源,以激发全员的积极性和创造性,为国有建筑施工企业的持续、健康、快速发展提供有力的保障。     

珍稀树种枳椇的生态习性及繁殖栽培与利用

枳椇具有较高的药用、食用、生态和材用价值,简要介绍了枳椇的生态习性,综述了当今枳椇的资源利用情况及目前繁殖栽培技术方面的研究进展,对下一步的研究方向提出了自己的看法。     

对安徽大学图书馆计算机网络系统建设的分析与思考

通过分析安徽大学图书馆的需求,介绍了该馆计算机网络系统具体建设的合理之处,指出了图书馆计算机网络系统建设过程中所应重视的地方,同时也对该系统的不足作出了分析和思考.     

农业科研单位实行会计委派的利弊及对策

从农业科研单位实行会计委派的实际出发,分析了农业科研单位实行会计委派的成效与优点、存在的问题与不足,并对完善、改革会计委派进行了详细的探讨,提出了相关对策.     

农业院校推行职业资格证书制度面临的形势与发展探讨

本文分析了农业院校职业技能鉴定工作现状及面临的形势,并对如何建立以需求为导向,以职业能力开发为重心的培训、鉴定工作新体系所要解决的问题做了初步探讨。     

Kinematic analysis of a stabilized parallel mechanism platform for satellite communication 

The 3 RPS parallel mechanism under unsteady conditions was studied. By establishing geographical coordinate systems and connecting the position of the stabilized platform with the motive vector, operational formulas between normal vectors in upper and rod length were deduced, and the inverse solution derived. The character of velocity and acceleration was analyzed and the trajectory of work space plotted. Analysis indicates the time function of the rod length and the surface of the work space's trajectory are smooth, and no singular position has been found.