罗伯特·安格斯·史密斯:英国有毒气体污染治理的奠基者

罗伯特·安格斯·史密斯是19世纪著名的化学家和环境学家,他担任了英国中央碱督察局第一任首席督察官,填补了督察局检查程序和工作风格的空白,提出"最佳实用方法"进行盐酸减排,强调督察员与碱业制造商的良好关系,以化学技术和咨询手段管控制碱业,有效减少有毒气体盐酸的排放,平衡污染治理与经济发展之间的关系.此外,史密斯还发现并命...     

低压铸造与紫铜结晶器研究

介绍了低压铸造的基本原理及优点,叙述了低压铸造技术在铜合金及紫铜材料领域的研究应用,研究了低压铸造紫铜的铸型材料选择及工艺设计方法,展望了低压铸造紫铜结晶器方面的发展前景,对实际生产具有一定的指导意义。     

反相高效液相法测定八角茴香果实中的莽草酸

用反相高效液相法在Waters Symmetry C18柱(5 μm,4.6 mm×150 mm i.d)上测定八角茴香果实中的莽草酸.工作参数为：流速0.5 mL/min;进样体积2 μL;检测波长220 nm;柱温30 ℃±1 ℃;流动相0.01 mol/L　K2HPO4磷酸盐缓冲液(pH值为3,用磷酸调配)和体积分数3%甲醇.平均回收率为97.76 %,RSD为1.937 %(n=5).     

A new Arietellidae (Copepoda: Calanoida) from the Red Sea

A new species of the calanoid copepod genus Paramisophria T. Scott, 1897 is described from the Egyptian sublittoral zone of the Red Sea. Paramisophria aegypti sp. nov. appears to be closely related to the species Paramisophria ammophila and Paramisophria platysoma. Paramisophria aegypti differs from P. ammophila in having two unequal lateral setae plus one long terminal process and two tiny equal lateral setae plus one long terminal process on the third exopodal segment on the male right and left fifth legs (vs three terminal processes increasing in size inward on both male fifth legs). Paramisophria aegypti can be distinguished from P. platysoma in the following characters: prosome symmetrical (vs extreme asymmetry); third exopod segment of the right leg completely separated from the second segment and bears two unequal lateral setae plus one long terminal process (vs partially fused to the second segment and bears four terminal processes increasing in size inward); third exopod segment of the left leg with two lateral setules and one long terminal process (vs two lateral setules, one short outer medial process and one long terminal process); endopodal lobes of the female legs 5 bear one long plumose seta (vs setae are lacking).http://www.zoobank.org/urn:lsid:zoobank.org:pub:C0A92BF9-2306-4A35-AA39-CE3B5865A396     

苯乙烯膦酸的结构计算与捕收性

应用HMO法对苯乙烯膦酸分子进行了量子化学计算,根据计算结果分析讨论了苯乙烯膦酸的捕收性,为进一步开发应用它提供了理论依据。     

大麦芽中酸性磷酸酯酶的分离

通过水抽提,有机溶剂抽提及Sephadex G-100纯化,从大麦芽中分离出高活力的均一的酸性磷酸酯酶。     

Acyl fluorides as reactive mimics of aldehyde pheromones: hyperactivation and aphrodisiac inHeliothis virescens

Summary Substitution of fluorine for the aldehydic hydrogen provides behaviorally active, chemically reactive pheromone mimics. In male moths of the tobacco budwormHeliothis virescens, Z9–14:Acf and Z11–16:Acf cause hyperactivity and irreversible extension of the genitalia in over 80% of treated moths. In addition, a combination of the two components leads to 10–50% of the pairs involving one treated partner becoming locked in copula.Supported by NSF grant PCM-8112755 and DMB-8316931, by a Fellowship from the Alfred P. Sloan Foundation (1981–85), and by Teacher-Scholar Grant from the Camille and Henry Dreyfus Foundation (1981–86) to G.D.P. Address correspondence to G.D.P.     

鳗鲡赤鳍病病原菌的研究

本文研究了鳗鲡赤鳍病的病原菌。从病鱼的肝、肾、血液中分离到11株菌,选择E90427等5株菌进行人工感染,100％的鳗鲡死亡,与自然发病的症状相似。这些菌株的特征都一致。均为革兰氏阴性短杆菌,菌体直。极端单鞭毛,运动,兼性厌氧,发酵葡萄糖、甘油产酸产气。氧化酶和过氧化氢酶阳性,葡萄糖酸盐氧化酶阳性,V.P.反应阳性。葡萄糖和铵盐可作唯一氮碳源,赖氨酸脱羧酶阴性,还原硝酸盐为亚硝酸盐。能利用半乳糖、甘露醇、蔗糖、阿拉伯糖、七叶灵,不利用卫矛醇、肌醇、菊糖、山梨醇和木糖。经分类鉴定为Ⅰ型嗜水产气单胞菌嗜水亚种(Aeromonas hydrophila subsp.hydrophila biotype I.)。     

肉仔鸡无鱼粉饲粮配方的试验研究(0—4周令)

120只肉仔鸡分为三个组。饲粮中含10％鱼粉的为对照组;饲粮中无鱼粉的为试验组。但另加0.2％的赖氨酸和0.2％的蛋氨酸。经28天试验,结果表明:无鱼粉组与含10％鱼粉的组相比较,不仅取得了同样的增重效果(p>0.05),而且饲粮成本降低,经济效益明显。