Statistical Mechanical Modeling of Protein Adsorption

We present rationale for and a derivation of a statistical mechanical model of protein adsorption. Proteins are modeled as rigid geometric objects adsorbing initially in a reversible manner and subsequently undergoing an irreversible change in shape to a permanently adsorbed state. Both adsorption and shape change occur subject to energetic interactions with previously adsorbed proteins. We evaluate the model quantitatively for proteins with disk‐shaped projections within the scaled particle theory and compare the predictions to experimental measurements taken via optical waveguide lightmode spectroscopy.     

Crystallization kinetics of native (pure) and commercial gutta percha (transpolyisoprene) and the influence of metal salts,oxides, ‘thermoplast’ and colouring agents on its crystallization rate

The kinetics of crystallization of gutta percha (trans-polyisoprene) were studied both in its native form and as the commercial product currently used for dental purposes. Mixtures of native gutta percha with selected low molecular weight substances (BaSO₄, CdSO₄, Bi₂O₃, ZnO), ‘Thermoplast’—a commercially formulated plasticizer, and colouring agents were also examined. It was shown that any incompatibility of the aforementioned substances caused an increase in the crystallization rate, while compatibility decreased the rate of crystallization.     

The crystalline to amorphous transition in PEO-based composite electrolytes: role of lithium salts

The effect of lithium salts (LiBF₄, LiPF₆, and LiClO₄) on the crystalline to amorphous transition in the poly(ethylene oxide) (PEO):LiX (8:1)-Al₂O₃ (20 wt.%, 24 nm) system was investigated and analyzed. Differential scanning calorimetry (DSC) and impedance measurements were conducted to characterize the transition. It was determined that among the three salts, lithium perchlorate (LiClO₄) was the most effective in producing and stabilizing the amorphous structure. Long-term stabilization of the specimens, predominantly in an amorphous state around ambient temperature, leads to a significant conductivity enhancement.     

Synthesis, characterization and application of a derivatized acid salt of tetravalent metal:o-chlorophenol anchored onto zirconium tungstate

Tetravalent metal acid (TMA) salt zirconium tungstate (ZW) has been synthesized, followed by its derivatization using ortho chlorophenol (ZWoCP). ZWoCP has been characterized for elemental analysis, spectral analysis (FTIR) and thermal analysis (TGA). Its chemical stability has been assessed in various acidic, basic and organic media. Ion exchange capacity (IEC) has been determined and distribution behaviour towards several metal ions in different electrolyte concentrations studied and a few binary separations achieved.     

Cast iron deterioration with time in various aqueous salt solutions

The changes with time in the corrosion rate and corrosion current density on a cast iron electrode in various aqueous salt solutions have been carried out using total immersion test and potentiostatic polarization curves. The concentration of salts taken is expected to be present in potable water. The relative behaviour of these salts towards corrosion has also been studied, which is found to be different from previous studies. The total immersion test parameters viz. weight loss, corrosion rate as well as potentiostatic parameters, open circuit potential,I _corr, Tafel slopes, corrosion rate, have been calculated by standard methods. Besides these the relative increase in corrosion rate with time as well as the percentage to which corrosion rate should be decreased so as to provide protection towards corrosion have also been calculated. It was found that KCl and NaCl are major contributors than MnSO₄, Pb(NO₃)₂, KI and KBr. The relative increase in corrosion is high in KBr, KI, NaNO₃, CaCl₂, and less in Pb(NO₃)₂, NaHCO₃ and CaCO₃ test solutions. For the reliability of results the data has been statistically analysed.     

碳二体系络合吸收剂的研究

通过测定乙烯／乙烷在含氮基团络合亚铜体系中的无限稀释相对挥发度，研究了基团碱度、配比数及稀释剂对吸收剂选择能力和稳定性的影响。实验表明，兼顾稳定性和选择能力，含氮基团与亚铜的最佳配比为3～4；稀释剂的极性越大，吸收剂的稳定性越好；碱度高的基团在配比较小时能充分发挥其稳定基团的作用。     

等离子体点火密闭爆发器实验研究

在密闭爆发器中研究了等离子体对含能材料燃烧性能的影响。分析了不同发射药、等离子体电能、电感等因素对发射药燃烧的影响。实验结果对电热化学炮的研究具有重要的意义。     

三硝基苯基氮杂C60衍生物的合成研究

通过Ｃ６０苦基氯和叠氮化的钠一锅反应的方法，首次将含能的三硝基苯基引入到Ｃ６０球体结构中，为探索Ｃ６０在含能材料方面的应用开拓了一条新途径。     

含能材料激光点火性能的试验研究

分析了固体含能材料光吸收性的特点,采用了既利于材料吸收又便于普通光纤传输的大功率固体Nd~(3+):YAG激光器,对各种含能材料进行了激光点火性能的试验研究,成功测得了各种含能材料的点火过程曲线,并对影响含能材料激光点火性能的各种因素(激光能量、脉冲持续时间、不同药粒等)进行了实验分析。结果表明,不同含能材料的激光点火性能存在较大的差异,这不仅与激光特性有关,而且与含能材料的热物性有着密切的关系。这必将为含能材料激光点火系统的设计提供参考和依据。     

Al/MoO3薄膜厚度对含能半导体桥发火特性的影响

使用微细加工技术在半导体桥上分别集成3μm和6μm厚度的Al/MoO_3纳米含能复合薄膜,制备成含能半导体桥,并使用电容放电的激发方式,研究薄膜厚度对含能半导体桥发火特性的影响。研究发现,随着薄膜厚度的增加,含能半导体桥的临界发火时间和临界发火能量无显著性变化,电容放电的作用总时间、作用总能量和能量利用效率降低,能量输出效率显著增加。