证券技术分析何以预测

证券技术分析自诞生以来，其合理性和有效性就一直受到了普遍的关注。有些人认为技术分析的作用非常有限，甚至是毫无根据和无效的。这一种观念在有效市场假说创立以来更上升到了理论的高度。本文认为，技术分析作为一种在证券投资中被广泛应用的预测股价变动的工具，具有一定的内在合理性因素，可以用来对股价变动的趋势作出预言。但必须指出:技术分析的科学性尚不能得到承认。     

浅谈建设项目经济评价方法不确定性分析

本文简要分析不确定性因素对经济评价指标的影响,和不确定性分析的几种方法,确定项目在经济上的可靠性。     

联合国粮农组织第十七届政府间茶叶工作组会议在内罗毕举行

联合国粮农组织第十七届政府间茶叶工作组会议于2006年11月28日至12月1日在肯尼亚首都内罗毕举行,共有21个国家和5个国际组织(商品共同基金、欧洲茶叶委员会、国际茶叶委员会、国际公平交易委员会和WINROCK国际组织)的113名代表参加了会议。中国派出了由农业、科研、经营等多部门组成的代表团参加会议。会议按程序选出了第十七届会议主席、副主席。肯尼亚议会议员当选为主席,斯里兰卡茶叶委员会主席当选为第一副主席,加拿大茶叶协会主席当选为第二副主席。     

UBG型光导电子液位仪的精度分析

ＵＢＧ型光导电子液位仪是８０年代末研制一种新型物高精度液位测量仪。介绍了该液位仪的工作原理，分析了液位仪在多种因素的影响下造成的系统误差，并给出了计算公式。经分析验证，该液位仪与同类产品相比，具有性能优良、防爆等级高、信号稳定可靠、抗干扰能力强、测量精度高等优点。     

Effects of inhibiting myosin light chain kinase on endothelin-1 induced proliferation and apoptosis of pulmonary arterial smooth muscle cells in rats

AIM: To investigate the effect of inhibiting myosin light chain kinase(MLCK) on endothelin-1(ET-1) induced proliferation and apoptosis of rat pulmonary artery smooth muscle cells(PASMCs). METHODS: Rat PASMCs were cultured and stimulated with ET-1. The cells were randomly divided into control group, ET-1 group and ET-1+MLCK inhibitor group(ET-1+M). Western blotting, MTT assay, [³H]-TdR incorporation and flow cytometry were employed to test the expression of myosin light chain(MLC) and MLCK, cell proliferation, cell cycle and apoptotic rate of PASMCs,respectively. The phosphorylation of MLC was determined by glycerol-PAGE coupled with Western blotting. RESULTS: Compared with control group, the protein expression of MLCK and MLC phosphorylation significantly enhanced after ET-1 stimulation. ET-1 markedly induced the proliferation and decreased the percentage of apoptotic rate in the PASMCs. However, pretreatment with ML-7, a MLCK inhibitor, significantly reversed the above effects induced by ET-1. CONCLUSION: MLCK inhibitor effectively inhibits the ET-1-induced proliferation and the cell cycle progression.     

紫色甘薯新品种吉徐紫2号

<正>吉徐紫2号花青素含量高,紫皮紫肉,薯块长纺锤形,单薯质量280~350 g,外形美观,营养价值高,食味好,使用范围广,抗逆性强,田间抗黑斑病,每667 m2产量2 400 kg左右。紫色甘薯新品种吉徐紫2号是2008年由江苏徐州甘薯研究中心选取优质紫薯浙紫1号为母本、万紫56为父本,通过有性杂交获得实生种子(系     

海南省西甜瓜细菌性果斑病的发生与防治

<正>近年来细菌性果斑病在海南西瓜、甜瓜生产上发生严重,其原因不仅与当地气候条件、栽培管理不当等有关,也与各地进行南繁的瓜类品种繁杂、种子消毒不彻底、病原远距离传播扩散有关。西瓜、甜瓜是海南省种植面积较为广泛、经济效益较高的农产品,2013年种植面积达1.97万hm2(29.55万亩)(农业部,2015)。细菌性果斑病是西瓜、甜瓜生产上的一种毁灭性病害,引起该病的病原菌为西瓜嗜酸菌(Acidovorax citrulli)(Schaad     

Effects of eplerenone on expression and activity of aortic endothelial nitric oxide synthase in hypertensive rats induced by high-salt intake

AIM: To explore the effects of eplerenone on the expression and activity of aortic endothelial nitric oxide synthase(eNOS) in high salt-induced hypertensive rats.METHODS: Male Wistar rats(4 week old, weighting 50～60 g) were randomly divided into control group, high-salt diet group and eplerenone group. The rats in control group were fed with ordinary rodent animal diet, the rats in high-salt group and eplerenone group were exposed to 5% salt diet for 16 weeks and administrated with the same dosage of saline or eplerenone(40 mg·kg^-1·d^-1) by gavage for 4 weeks, respectively. Systolic blood pressure(SBP) was measured by tail-cuff every 2 weeks. The rats were sacrificed after 16 weeks and the thoracic aorta was collected. The aldosterone content in the aorta was measured by ELISA. The protein levels of mineralocorticoid receptor(MR) and eNOS were determined by Western blot. The activitie of constitutive NOS(cNOS) was measured by chemocolorimetry. The protein localization of eNOS, neuronal nitric oxide synthase(nNOS) and MR was observed by immunohistochemistry.RESULTS: A process of 8-week high-salt diet increased SBP gradually. SBP in the rats exposure to high salt for 16 weeks was significantly higher than that in control group(P<0.05). After 4 weeks of eplerenone treatment, SBP in the rats was significantly lower than that before treatment(P<0.05). Compared with control group, the aldosterone content in the aorta were significantly increased in high-salt diet group and eplerenone group(P<0.05), the expression level of MR also increased significantly(P<0.05). Compared with control group, both eNOS protein expression(P<0.05) and cNOS activity in high-salt diet group were significantly decreased(P<0.05). The protein expression of eNOS as well as cNOS activity in aorta increased significantly in eplerenone group compared with high-salt diet group(P<0.05).CONCLUSION: Aldosterone content in aorta of high-salt-induced hypertensive rats increases significantly. Aldosterone attenuates the protein expression of eNOS and reduces the enzyme activity through the activation of mineralocorticoid receptor. The selective mineralocorticoid receptor antagonist eplerenone enhances the protein expression of eNOS and its activity, thereby improves eNOS function.