Synthesis of trans-bis（glycinato） copper（Ⅱ） complex nanorods by room temperature solid-state reaction

Trans-[Cu(glyo)2(H2O)] nanoparticles with average diameters about 20-30 nm were prepared by onestep room temperature solid-state reaction. Trans-[Cu(glyo)2]nanorods with diameters ranging from 100 to 150 nm and lengths up to several μm were also prepared by one-step room temperature solid-state reaction in the presence of a suitable nonionic surfactant PEG400. The chemical composition and structural features of the products were investigated by elemental analyses, XRD, TG, SEM and TEM, respectively. The mechanisms of formation were also discussed.     

The Application of Microwave Low Temperature Plasma in Pretreatment of Cotton Fabric

The effect of microwave low temperature plasma pretreatment on desizing and removing natural impurity of cellulose fiber was studied. The influencing factors of pretreatment such as treating power, gas pressures and time were discussed in detail and the final effect had been compared with that of traditional pretreating process of cotton fabric. The results showed that better capillary effect, strength, whiteness and dyeing K/S value could be given by means of microwave low temperature plasma treatment.     

A high-performance thermoacoustic refrigerator operating in room-temperature range

The working principle of an efficient travelling- wave thermoacoustic refrigerator operating in room-temperature range has been analyzed and an experimental set-up has been built. The experiment showed that suppressing DC-flow streaming was very critical to efficient operation, and an elastic membrane was used to solve the problem successfully. At the most efficient operating point, the novel thermoacoustic refrigerator achieved a cooling capacity of about 80 W at -20℃, with a much higher efficiency than previously developed standing-wave thermoacoustic refrigerator.     

热处理对纳米晶ZrO_2∶Sm~(3+)晶体结构和发光性质的影响

用共沉淀法在不同的热处理温度下制备了纳米ZrO2:Sm3+发光粉体,所制备的粉体具有Sm3+离子特征强室温荧光发射。通过对不同热处理温度下样品晶体结构和发光研究发现:以此工艺制备的纳米晶ZrO2:Sm3+含有单斜相和四方相两种微观结构,四方相的含量与热处理的温度和时间有关,Sm3+离子的掺入有稳定ZrO2四方晶相的作用;因不同热处理温度下样品晶体结构不同,因此它们的发光中心不同。     

Pollen records and time scale for the RM core of the Zoige Basin, northeastern QinghaiTibetan Plateau

A continuous pollen record from the Zoige Basin in the northeastern Qinghai-Tibetan Plateau not only provides information on the vegetation and climate changes during the last two glacial/interglacial cycles, hut also gives proof to establish the time scale of the upper 60 m of the RM core. Subalpine spruce-fir forests colonized the Zoige Basin during the interglacials and interstadials, implying warm and wet climate conditions. Alpine periglacial desert or dry desert may have existed during the penultimate glacial and the last glacial maxima, respectively. Alpine sedge meadow dominated the landscape during MIS 4. The MIS 3 is punctuated by a number of stadials similar to those documented in the Guliya and GISP2 ice cores, as indicated by repeated rise and fall of subalpine spruce-fir forests. Our pollen record reveals a regional climate history similar to those from the neighboring sites, including the Arabian Sea and the Guliya ice core, and thus supports the notion that the Qinghai-Tibetan Plateau acts as an important link between climatic events in the North Atlantic realm and the Asian monsoon domain.     

催化极谱法测定生物样品中的微量硒

建立了测定生物样品中微量硒的催化极谱法.试验发现Se(Ⅳ)与谷胱甘肽在-0.94 V(vs.SCE)处形成一个灵敏的极谱催化波.Se(Ⅳ)浓度在4.0×10-7～8.0×10-6mol/L的范围内,峰电流与Se(Ⅳ)浓度呈线性关系.Se(Ⅳ)的检出限为2.0×10-7mol/L,相对标准偏差均小于5%.此法简便、快速、灵敏,结果准确.     

HPLC测定川菊中叶黄素的含量

建立川菊中叶黄素含量的检测方法.采用高效液相色谱法,以叶黄素为指标,D iamonsilTMC18柱(4.6mm×150mm,5μm);CH3OH-H2O(95.5?4.5)为流动相;检测波长为444.5 nm.结果:平均回收率为99.23%,RSD=0.6%.进样量在0.0027-0.0189μg线性关系良好,r=0.9998.该方法简便、稳定、重现性好,为菊花质量的控制提供参考.     

钢筋混凝土框架结构温度应力的一种算法

伸缩缝间距与温度应力及混凝土收缩产生的应力关系密切，《混凝土结构设计规范（GB50010—2002）》给出的铜筋混凝土框架伸缩缝间距取值比较原则化，如能保证温度应力及混凝土收缩应力不大于混凝土的抗拉能力，保证混凝土不开裂，则可确定伸缩缝间距。以单层框架为例，通过理论分析，计算出框架结构的温度应力，这将有助于伸缩缝间距的计算。     

涤纶长丝织物在染整加工中缩率的变化

涤纶织物在染整加工过程中，受到各种工艺条件的复合作用，从而使得产品在外部形态及结构尺寸上不断发生变化．为了确切反映染整加工中每道工序对织物形态的影响，实验模拟了不同品种的涤纶长丝织物的染整工艺，分别考察各工序处理后织物缩率的变化．结果发现，各个工序对织物的缩率有不同程度的影响，织物在整个染整工艺过程中的总缩率随着热定型温度的升高而增加;影响织物收缩的因素包括热、湿和碱，其中热、湿的作用最为显著．     

关于黑洞热力学第0定律

分析了JDBekentein黑洞热力学第0定律的基本矛盾.根据热力学中第0定律的本质含义,Bekentein黑洞热力学第0定律中引入的温度并不具有通常意义下的热平衡传递性.因此Bekentein黑洞热力学第0定律并不满足一般热力学第0定律的基本要求.若把引力场对时空弯曲的因素考虑在内,则在黑洞视界内可以形式地引入一个能在视界内保持“热平衡传递性”的温度,即视界温度.然而这个温度不是任意的,而是受动力学参量——视界引力加速κ 完全控制的温度.因此黑洞热力学中温度的传递性不仅局限于黑洞视界面上,而且还只能对由κ 所决定的视界温度才具有热平衡的传递性.即使这样,由于纯引力场能量是负定的,因此由视界引力加速度κ 决定的温度也必然是负定的,而不可能是正定的.