Biomolecule profiles in inedible wild mushrooms with antioxidant value

The use of natural products isolated from mushrooms, included inedible species, against infection, cancer diseases and other oxidative-stress related diseases is one of the cornerstones of modern medicine. In the present work, the antioxidant molecule profiles of inedible mushroom species were evaluated and compared with those of edible species. The order of antioxidant abundance found in inedible wild mushrooms was: phenolics > flavonoids > ascorbic acid > tocopherols > carotenoids, similar to that of edible species. Furthermore the same energetic biomolecules were found including the disaccharide trehalose, the monosaccharide alcohol derivative mannitol and the fatty acids palmitic, oleic and linoleic acids. Fomitopsis pinicola revealed a very high phenolics concentration (388 mg GAE/g extract) and powerful antioxidant properties, mainly reducing power (EC??) value 60 μg/mL similar to the standard Trolox?). It could find applications in the prevention of free radical-related diseases as a source of bioactive compounds.     

Prospects for ultracold carbon via charge exchange reactions and laser cooled carbides

Strategies to produce an ultracold sample of carbon atoms are explored and assessed with the help of quantum chemistry. After a brief discussion of the experimental difficulties using conventional methods, two strategies are investigated. The first attempts to exploit charge exchange reactions between ultracold metal atoms and sympathetically cooled C(+) ions. Ab initio calculations including electron correlation have been conducted on the molecular ions [LiC](+) and [BeC](+) to determine whether alkali or alkaline earth metals are a suitable buffer gas for the formation of C atoms but strong spontaneous radiative charge exchange ensure they are not ideal. The second technique involves the stimulated production of ultracold C atoms from a gas of laser cooled carbides. Calculations on LiC suggest that the alkali carbides are not suitable but the CH radical is a possible laser cooling candidate thanks to very favourable Frank-Condon factors. A scheme based on a four pulse STIRAP excitation pathway to a Feshbach resonance is outlined for the production of atomic fragments with near zero centre of mass velocity.     

创新是业务增长的关键

在过去的5年间，西门子移动网络部已经从全球第6名进阶到第3名。特别是在亚洲，西门子在刚刚过去的这个财年获得了20％的增长，远远超过市场平均增长水平。亚洲将一直保持巨大的发展潜力。该地区2／3的GSM运营商还在等待3G牌照的发放。到2010年，全世界37％的3G／W-CDMA用户将来自亚洲；2010年的移动用户亚洲的增数将和所有其他地区的增数之和相当。     

美国休斯飞机公司的对空防御雷达(HADR)天线

HADR天线是为高功率S波段三座标雷达系统而设计的一种平面阵列天线。它在仰角上采用相扫,在方位上则采用360°机械扫描。为了获得最佳的数据率和最佳的能量控制,仰角上的电波束宽度是这样控制的:在低仰角为笔形波束而在高仰角使波束加宽。天线由缝隙波导阵列组成,其水平波束具     

24所走向市场新微电子科技开发公司挂牌开业

由机电部第二十四研究所主办的高新技术开发公司—新微电子科技开发公司于1992年11月7日在重庆南坪经济开发区挂牌开业。重庆市分管科技的市长窦瑞华等领导出席了公司成立大会并在会上做了热情洋溢的讲话。窦副市长对24所的科技人员说:“要鼓励科技人员敢于致富、敢于发财、发‘横’财、发‘洋’财。     

罗巴切夫斯基傳略

尼可萊·伊萬諾維奇·羅巴切夫斯基(?)是偉大的俄羅斯數學家,非歐幾裏得幾何學的建立者,唯物論的思想家,於1792年俄曆11月20日(西曆13月1日)誕生於下諾伏哥羅德(即現在的高爾基城)一個窮官員的家庭中,羅巴切夫斯基的一生幾乎全部在喀山度過,他在那邊上中學(1802-1807),接著上喀山大學(1807-1811年)學習,大學畢業後,他留在校內;1811年得碩士學位,1814年任教授助理,1816年升非常任教授,1822年常任教授,並歷任該大學物理數學系主任(1820-1821,1823-1825年)及校長(1827-1846年)等職,在晚年(1846-1856年)羅巴切夫斯基是喀山學區的副督學,羅巴切夫斯基的活動奠定了喀山大學興盛和光榮的基礎,在馬格尼茨基(?)任喀山學區督學七年(1819-1826年)的黑暗時期之後,也就是在反動勢力和宗教盲信的囂張時期之後,羅巴     

螺旋天线

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