Hamilton图中Hamilton圈条数上界的估计

邻接矩阵是一个V×V的矩阵A(G)=[aij],其中aij是连接Vi和Vj的边的数目。文章通过邻接矩阵的一个性质得到了一个H am ilton图中H am ilton圈条数的一个粗略上界。     

Superoxide dismutase activity during the plasmodial life cycle ofPhysarum polycephalum

Summary Superoxide dismutase activity was slow throughout the cell cycle of surface cultures ofPhysarum polycephalum. This activity increased markedly when the organism was induced to spherulate. Glutathione (GSH) and hydrogen peroxide (H₂O₂) concentrations changed very little during the cell cycle. During spherulation GSH decreased; H₂O₂ and the cyanide-resistant respiration of plasmodial homogenates increased.     

毛竹基腐病侵染循环的研究

报道毛竹基腐病侵染循环的研究结果：（１）病原菌以菌丝或孢子的形态在病竹，枯立竹和病株残体及土壤内潜伏越冬成为次年初次侵染的来源；（２）风、随风和雨和雨水反溅是孢子传播的主要途径；（３）在自然情况下，病菌主要通过幼嫩的无伤表皮侵入寄主体内；（４）通过田间观察和病变组织的分离培养试验结果，结合病菌本身的特性可以初步确定该病菌是通过分泌毒素杀死寄主细胞后进入寄主组织的；（５）该病没有再次侵染。     

Two Sufficient Conditions for Hamiltonian Graphs

ＴｗｏＳｕｆｆｉｃｉｅｎｔＣｏｎｄｉｔｉｏｎｓｆｏｒＨａｍｉｌｔｏｎｉａｎＧｒａｐｈｓＬＩＧｕｏｊｕｎ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｈｅｍａｔｉｃｓ，ＹａｎｔａｉＴｅａｃｈｅｒ＇ｓＣｏｌｌｅｇｅ，Ｙａｎｔａｉ２６４０００，Ｓｈａｎｄｏｎｇ）ＬＩＵＺ...     

制冷循环中的损失分析计算

本文由热力过程损失导出计算制冷循环的总损失ＥＬ的表达式；并证明ＥＬ≥０．用这种分析法计算了使用非共沸工质的劳伦兹循环的总损失ＥＬＺ，并与逆郎肯循环对比．结果表明两者的制冷系数都受到工质吸热过程的平均温度和放热过程平均温度的制约．     

环区原理的一个推论及其应用

本文给出环区原理在三维空间中的一个推论,它证明了满足三个条件的空间系统就满足环区原理的条件,从而存在周期轨道。利用这个推论,又得到两个有关构作空间极限环的定理。     

Cellular responses to mild heat stress

Since its discovery in 1962 by Ritossa, the heat shock response has been extensively studied by a number of investigators to understand the molecular mechanism underlying the cellular response to heat stress. The most well characterized heat shock response is induction of the heat shock proteins that function as molecular chaperones and exert cell cycle regulatory and anti-apoptotic activities. While most investigators have focused their studies on the toxic effects of heat stress in organisms such as severe heat stress-induced cell cycle arrest and apoptosis, the cellular response to fever-ranged mild heat stress has been rather underestimated. However, the cellular response to mild heat stress is likely to be more important in a physiological sense than that to severe heat stress because the body temperature of homeothermic animals increases by only 1–2°C during febrile diseases. Here we provide information that mild heat stress does have some beneficial role in organisms via positively regulating cell proliferation and differentiation, and immune response in mammalian cells.Received 14 May 2004; received after revision 2 August 2004; accepted 16 August 2004     

以人为本,加强与完善我院自行车队的管理

为了创造优异的运动成绩,需要充分发挥教练员和运动员的主观能动性。运动队的管理工作必须建立在“以人为本”的理念上,理性地处理影响运动成绩的各种因素。     

HAMILTONICITY IN 2-CONNECTED {K_(1,3) F}-FREE GRAPHS

ＨＡＭＩＬＴＯＮＩＣＩＴＹＩＮ２－ＣＯＮＮＥＣＴＥＤ｛Ｋ_（１，３）Ｆ｝－ＦＲＥＥＧＲＡＰＨＳ￥ＬＩＧｕｏｊｕｎ（ＭａｔｈｅｍａｔｉｃｓＤｅｐｅｒｔｍｅｎｔｏｆＹａｎｔａｉＴｅａｃｈｅｒ＇ｓＣｏｌｌｅｇｅ，Ｙａｎｔａｉ２６４０００，Ｃｈｉｎａ）ＬＩＵ?..