柄海鞘营养成分分析及提取物对小白鼠S—180实体瘤的抑制作用

柄海鞘含有１９种氨基酸,包括９种必需氨基酸。氨基酸总含量３３２．１３ｍｇ／１００ｇ湿重,必需氨基酸为１０９．８０ｍｇ／１００ｇ湿重,所测１０种矿物质成分中Ｍｇ含量较高,柄海鞘提取物（ＥＳ）通过腹腔注射（５０ｍｇ／ｋｇ体重）可有效地抑制小白鼠Ｓ－１８０实体瘤的生长,抑制率达７２．１４％（Ｐ〈０．０１）。对小白鼠的生长没有任何限制。     

MPCVD金刚石薄膜形核率研究

本文对ＭＰＣＶＤ金刚石薄膜的成核过程进行了研究，详细描述了金刚石晶粒成核的微观过程，给出了单晶硅（１００）基片上金刚石薄膜的成核密度随时间的变化曲线     

MPCVD刚石薄膜形核率研究

本文对ＭＰＣＶＤ金刚石薄膜的成核过程进行了研究，详细描述了金刚石晶粒成核的微观过程，给出了单晶硅（１００）基片上金刚石薄膜的成核密度随时间的变化曲线。     

含氢聚硅氧烷／丙烯酸丁酯／丙烯酰胺聚合物乳液粒子的形成,大小与流变性研

采用一次加料法和半连续滴加法制备了含氮聚硅氧烷（ＰＨＭＳ）／丙烯酸丁酯（ＢＡ）／丙烯酰胺（ＡＭ）复合聚合物乳液,探讨了乳液成核机理,考察了ＰＨＭＳ、ＡＭ用量、加料主试对乳液粒大小及其流变形的影响,发现该聚合机理以胶束成核为主,ＰＨＭＳ用量增加,乳液粘度,乳液粒子尺寸增大,ＡＭ用量对其影响较小。     

高取向 KTN 薄膜的 PLD 法制备研究

用Ｓｏｌ－Ｇｅｌ法自制了ＫＴＮ陶瓷,以之为靶材,首次在单晶硅上用ＰＬＤ技术沉积了ＫＴＮ薄膜,并对所制备的薄膜进行了ＸＲＤ和ＳＥＭ分析及Ｐ－Ｅ电滞回线观察．观察分析结果表明：薄膜的主晶相为钙钛矿相（约９８％）,且沿（１００）方向取向生长;薄膜表面光滑、无裂纹、致密性好;薄膜具有良好的铁电性质．同时还分析了Ｓｉ（１００）单晶衬底上钙钛矿相的形成机理;并讨论了衬底温度Ｔｓ和氧气氛等因素对成膜的影响．     

载能粒子沉积薄膜生长的微观机制研究

采用嵌入原子间相互作用势,利用分子动力学方法模拟了载能原子沉积Ａｕ／Ａｕ（１００）薄膜的生长过程,通过对薄膜生长的表面覆盖度曲线和Ｂｒａｇｇ衍射强度等随沉积原子能量变化的研究,发现随着沉积原子能量的增加,薄膜的生长模式从Ｓｔｒａｎｓｋｉ－Ｋｒａｓｔａｎｏｖ生长（Ｓ－Ｋ生长）转变为Ｆｒａｎｋｖａｎ ｄｅｒ Ｍｅｒｗｅ生长（Ｆ－Ｍ生长）。同时,通过对沉积原子能量、基体温度随是演化分析,探讨了载能原子在     

衬底负偏压热灯丝CVD金刚石薄膜在锥体上核化的研究

以ＣＨ４和Ｈ２为反应混合气体,用衬底负偏压热灯丝ＣＶＤ法在Ｓｉ（１００）面上制备金刚石膜,使用扫描电子显微镜（ＳＥＭ）,Ｒａｍａｎ谱和Ｘ射线光电子能谱（ＸＰＳ）对在硅尖上的金刚石核化进行了研究,并着重讨论了沉积在硅尖上的金刚石颗粒的生长机理。     

苯乙烯—甲基丙烯酸酯—丙烯醋三元无皂乳液共聚合动力学研究

以苯乙烯（Ｓｔ）、甲基丙烯酸甲酯（ＭＭＡ）为主单体,丙烯酸（ＡＬ）为功能单体进行了无皂乳批量共聚合、考察了功能单体浓度、引发剂过硫酸铵ＡＰＳ浓度及聚合温度及其动力学行为的影响,胜Ｇａｍｍａ积分函数拟合了转化率－时间曲线,获得了聚合过程的重要特征参数中：平均成核速率（ＮＶ）,聚合最小速率（ＭＶ）和平稳期平均聚速率（ＡＶ）及成核结束和聚合进入完成期对应的转化率,同时对聚合速率与以上各聚合参数数据进行了     

磺胺二甲基嘧啶在海兰鸡组织中的浓度测定

为进一证实磺胺二甲基嘧啶（以下简称ＳＭ２）防治鸡球虫病的实用价值，测定了该药给药后不同时间在海兰鸡心、肺、肝、肾、脾、肌肉和小肠等组织中的浓度．发现ＳＭ２在海兰鸡体内吸收快，分布广泛，在心、肝、肺、肾及小肠中浓度较高，尤其在小肠内浓度最高，给药后０．５ｈ药物浓度高达２７．８０３４（ｍｇ／１００ｍｌ），给药后６ｈ内药物浓度均值为１１．４９６８（ｍｇ／１００ｍｌ），都大大超过了磺胺药在血液中的最低有效浓度（５ｍｇ／１００ｍｌ），进一步证实了ＳＭ２防治鸡球虫病的实用价值．     

衬底材料对直接光化学汽相淀积类金刚石碳膜成膜初期的影响

以微波激励氙（Ｘｅ）发射的真空紫外（ＶＵＶ）光作光源,乙炔（Ｃ２Ｈ２）作反应气体,氮（Ｎ２）、氩（Ａｒ）和氢（Ｈ２）气为稀释气体,采用直接光化学汽相淀积（ＣＶＤ）工艺,在硅（Ｓｉ）、钼（Ｍｏ）及玻璃衬底上进行了类金刚石碳（ＤＬＣ）膜的淀积生长。通过光电子能谱（ＸＰＳ）和扫描电子显微镜（ＳＥＭ）的测试与观察,研究了在同样工艺条件下不同衬底材料对ＤＬＣ膜成膜初期碳原子的吸附、凝聚及成核过程。实验结果表     

A1/Ge双层膜退火过程中多中心晶化生长的模拟

对 a-Ge/Al 双层膜在退火过程中出现的分形晶化现象进行了模拟研究。结果显示,各团簇的生长呈现出各向异性。分形晶化是随机相继触发形核的结果。这种多中心分形晶化图形显示出多重分形特征,用盒计数法得到了模拟图形的多重分形谱。     

a—Ge/Au双层膜中单分形团族的Monte—Carlo模拟

本文用 Monte-Carlo 方法模拟了 a—Ge/Au 双层膜中单中心分形生长过程。模拟图形与实验结果一致说明实际的晶化生长是由随机逐次成核过程决定的。多重分形谱能定量地表征单生长中心晶化图形。     

聚乙烯促进低压气相金刚石成核的机理

研究了在微波等离子体化学气相沉积条件下，聚乙烯对金刚石在单晶硅衬底上形核的影响，发现预发覆在硅衬底的聚乙烯显著地促进了金刚石的形核；提出了聚忆核的机理和具有ＳＰ＾３杂化结构的含碳活化粒子饱和度概念及其促进金刚石形核的观点。     

Corrosion behavior and characteristics of the product film of API X100 steel in acidic simulated soil solution

The short-term corrosion behavior of API X100 steel in an acidic simulated soil was investigated by electrochemical measurements and soaking experiments, followed by corrosion morphology observations and X-ray photoelectron spectroscopy analyses. The results show that X100 steel exhibits an obvious pitting susceptibility in an acidic soil environment. Pits nucleate after approximately 10 h of immersion. Along with the nucleation and growth of the pits, the charge-transfer resistance and open-circuit potential first increase sharply, then decrease slowly, and eventually reach a steady state. The maxima of the charge-transfer resistance and open-circuit potential are attained at approximately 10 h. The evolution of the electrochemical process is confirmed by the analysis of the product film. The product film exhibits a porous and loose structure and could not protect the substrate well. The product film is primarily composed of ferrous carbonate and ferrous hydroxide (Fe(OH)₂). The concentration of Fe(OH)₂ in the product film increases from the inside to the outside layer.     

某些添加剂对镍在玻璃碳上电结晶的影响

用阶跃电位法研究了光亮镍Watts镀液中添加剂:糖精、丁炔二醇和香豆素,对镍在玻璃碳上沉积初始阶段的影响.结果表明,在不含添加剂的该电解液,镍电结晶的初始阶段按连续成核的三维生长机理进行;分别或同时含有糖精和丁炔二醇时,则按瞬时成核的三维生长机理进行.糖精或丁炔二醇促进成核过程而阻化晶核的生长,这两种添加剂同时存在时则对成核和三维生长都起促进作用;添加香豆素或者同时添加三种添加剂不改变成核和生长的方式,但香豆素对成核过程和晶核生长都起着促进作用,而三种添加剂混用则对成核和生长过程起着阻化作用.本文采用Fleischmann等人郝二建模型.     

Preparation and optical absorption of InAs nanocrystal-embedded thin films

InAs-SiO₂ nanocrystal-embedded films were prepared by using radio-frequency cosputtering. The growth behavior of InAs in the composite film has been studied by a transmission electron microscope. It has been found that with the increasing substrate temperature, InAs in the matrix undergoes transitions from an initial dispersed phase to a fractal structure of the lnAs phase, then to nucleation, and finally to grain growth. Large blueshift of the optical absorption edges of the films was observed from the optical absorption spectra. The relationship between the blueshift of optical absorption edge and the average size of the nanocrystals has been explained by the effective-mass approximation.     

低温下超薄膜分形生长的Monte-Carlo模拟

用 Monte-Carlo方法模拟了不同沉积速率下超薄膜中多粒子扩散、多中心生长的动力学过程。成核率随沉积速率的增大呈指数上升 ,成核率随时间的增大而迅速下降 ;对于确定的沉积速率 ,各个粒子在衬底上的扩散步数相差非常大 ;粒子按扩散步数的分步具有多重分形的特性。     

Experimental and theoretical study on rapid transient nucleated boiling

A laser heater has been used to impose a pulsed high power laser beam on a metal film inunersed in liquid to generate a very high rate of temperature rise up to 9.3 × 106K/s in the metal film. The rapid transient boiling phenomena have been observed and the temperature variations in the metal film have been measured. Theoretical calculations have been carried out with the fluctuation nucleation theory and the heat conduction theory to compare with the experimental results, and some results are reported.     

Stable sulphate clusters as a source of new atmospheric particles

The formation of new atmospheric particles with diameters of 3-10 nm has been observed at a variety of altitudes and locations. Such aerosol particles have the potential to grow into cloud condensation nuclei, thus affecting cloud formation as well as the global radiation budget. In some cases, the observed formation rates of new particles have been adequately explained by binary nucleation, involving water and sulphuric acid, but in certain locations--particularly those within the marine boundary layer and at continental sites--observed ambient nucleation rates exceed those predicted by the binary scheme. In these locations, ambient sulphuric acid (H2SO4) levels are typically lower than required for binary nucleation, but are sufficient for ternary nucleation (sulphuric acid-ammonia-water). Here we present results from an aerosol dynamics model with a ternary nucleation scheme which indicate that nucleation in the troposphere should be ubiquitous, and yield a reservoir of thermodynamically stable clusters 1-3 nm in size. We suggest that the growth of these clusters to a detectable size (> 3 nm particle diameter) is restricted by the availability of condensable vapour. Observations of atmospheric particle formation and growth from a continental and a coastal site support this hypothesis, indicating that a growth process including ternary nucleation is likely to be responsible for the formation of cloud condensation nuclei.     

Orientation variation along growth direction of millimeter free-standing CVD diamond thinned by mechanical grinding

A free-standing diamond film with millimeter thickness prepared by DC arc plasma jet was thinned successively by mechanical grinding. The orientation and quality of the diamond films with different thicknesses were characterized by X-ray diffraction and Raman spectroscopy, respectively. The results show a random grain-orientation distribution during the initial growth stage. As the film thickness increases, the preferred orientation of the diamond film changes from (111) to (220), due to the competitive growth mechanism. Twinning generated during the nucleation stage appears to stabilize the preferential growth along the 〈110〉 direction. The interplanar spacing of the (220) plane is enlarged as the film thickness increases, which is caused by the increase of non-diamond-phase carbon and impurities under the cyclic gas. In addition, the quality of the diamond film is barely degraded during the growth process. Furthermore, the peak shift demonstrates a significant inhomogeneity of stress along the film growth direction, which results from competitive growth.