石英晶体微天平用于微囊藻毒素在聚合物涂覆的金片表面吸附

合成了具有不同功能化的聚苯乙烯树脂,利用石英晶体微天平对树脂和微囊藻毒素相互吸附作用进行实时监测和研究．研究发现,吸附的pH和表面性质对于吸附量有重要的影响,而温度影响不大,中性pH氨基树脂对微囊藻毒素的吸附效果最好     

Confinement of spherical colloid particles in a soft fluid membrane tube

We investigate the structure of multiple spherical particles confined in a soft membrane tube that originally has a cylindrical shape. Assuming an attraction energy between the surface of the spherical particle and the inner wall of the membrane tube, we show that a variety of conformational structures can be stabilized on the basis of analyzing a Helfrich energy for the soft tube. Using a numerical approach, we calculate the phase diagram in terms of basic parameters in the system. Structures that prefer close contact of spheres and structures that contain well separated spheres are found in this calculation.     

灾后重建地区新增血站的选址问题研究

根据灾后重建地区血液保障体系建设的实际情况,考虑血站间的依附系数对血站布局的影响,建立了一种p-中值模型用来解决新增血站的选址问题,并设计了一种遗传-禁忌混合算法对模型进行求解。之后以汶川大地震灾区——四川省阿坝州为例进行了实例分析,得到了不同p值与依附系数下的新增血站选址方案,以期为相关部门规划灾后重建地区的血液保障体系提供理论依据与决策参考。     

怎样更切合实际地应用误差理论

引言本文提出了一系列误差处理方法。包括:误差的观察和计算、最佳取值判据、利用误差分析的结论来改进实验。总之,本文力图进一步从与客观严格对应的数据的角度提出分析和改进实验的方法。一、必须在实际条件中全面地估计直接测量量的误差例:对于0.1℃/div的精密温度计,出厂标称允许误差为0.05℃,则对于温度误差的估计一般不小于0.05℃。实际上,在看温度计时,由于眼睛的高度以及温度计的垂直程度难以掌握,所估计的误差可以是0.1℃。而对于一平均降温率为0.1℃/min的容器,若延误读数在5分钟以内,则可估计误差为     

脱合金制备纳米多孔双金属氧化物NiMoO_4及其电化学性能

采用快速凝固与脱合金相结合的方法制备纳米多孔Ni-Mo合金,然后退火获得三维双连续纳米多孔NiMoO_4,采用XRD、SEM、TEM对多孔NiMoO_4的成分、形貌和结构进行表征,并通过循环伏安、恒电流充放电等方法测试多孔NiMoO_4电极的电化学性能。结果表明,Ni_5Mo_5Al_(90)和Ni_(2.5)Mo_(2.5)Al_(95)经脱合金和退火均可获得纳米多孔NiMoO_4,Mo元素对脱合金具有钉扎作用,可减小多孔合金的骨架和孔隙尺寸,由Ni_5Mo_5Al_(90)合金获得纳米多孔NiMoO_4表现出更为优异的超电容性能,其在1 A·g~(-1)电流密度比容量达708 F·g~(-1),当电流密度增加20 A·g~(-1),其比容保持率达57.1%。在4 A·g~(-1)电流密度下循环充放电1 000次,其比容保持率达91.2%。     

Theoretical simulation of the photoassociation process for NaCs

We investigate the two-step association process of NaCs using the time-dependent wave packet method.Ground state atoms can be photoassociated to the low vibrational levels of the ground state for an NaCs molecule by the two-step association.The time-dependent Schro¨dinger equation of the association process is solved within a three-state model and the wave packet is propagated with the "split operator-Fourier transform" scheme and the rotating-wave approximation(RWA).The vibrational population distribution of the ground state can be obtained by projecting the wave packet to every vibrational level of the ground state.The results not only show that for NaCs achievement of photoassociation production is accompanied by the photodissociation of the higher vibrational molecules,but also show that the vibrational distribution in lower vibrational levels of the ground state changes with the laser parameters.     

氟尿苷-层状双金属氢氧化物纳米杂化物制备及表征

采用共沉淀法将抗癌药物氟尿苷插入Mg-Al层状双金属氢氧化物(LDHs)的层间,合成了氟尿苷-LDHs纳米杂化物。依据氟尿苷分子大小和杂化物通道高度推测,氟尿苷分子是以长轴垂直或略倾斜于LDHs层片在LDHs层间呈双层排列。分别在pH=4.8和7.2的介质中研究了药物释放动力学,表明符合准二级动力学方程;释放速率随载药量增大而降低;氟尿苷-LDHs纳米杂化物具有良好的缓释效果。     

大黄鱼膨化和湿软饲料的饲喂效果

分别用膨化饲料、粉料加鱼浆（6：4）制成的湿软饲料、鲜杂鱼在深水网箱、小网箱中饲养大黄鱼，膨化饲料与湿软饲料在深水网箱中养殖的饲料系数分别为1．03和1．07，生长速度、成活率与鲜杂鱼组相当，公斤鱼成本低9．36％和6．01％，且投喂配合饲料后鱼体蛋白质和呈味氨基酸占氨基酸总量的比值无显著差别，以投喂膨化料比投喂粉料加鱼浆更经济些．     

Symmetrical adhesion of two cylindrical colloids to a tubular membrane

With the full treatment of the Helfrich model we theoretically study the symmetrical adhesion of two cylindrical colloids to a tubular membrane. The adhesion of the rigid cylinders with different radius from the membrane tube surface can produce both shallow wrapping with relatively small wrapping angle and deep wrapping with big wrapping angle. These significant structural behaviors can be obtained by analyzing the system energy. A second order adhesion transition from the desorbed to weakly adhered states is found, and a first order phase transition where the cylindrical colloids undergo an abrupt transition from weakly adhered to strongly adhered states can be obtained as well.