Optoelectronic Butterfly Interconnection Implementation of an n-bit Parallel Full Addition and Subtraction

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光合作用原初过程能量和电荷超快传递过程原理浅析

文章侧重于从物理的角度,介绍光合作用原初过程中能量和电荷超快传递过程的相关物理化学原理,如费米黄金规则,Frster及Dexter传能机制,Marcus电荷转移理论及激子理论.辨析相关原理的适用范围、共性及差异,并力图在上述相关原理的基础上阐述光合膜蛋结构与功能的关系,勾画出该研究方向的基本脉络.     

掺杂C60的SiO2气凝胶的制备及荧光特性研究

利用“化学掺杂”方法，制备掺杂C₆₀-SiO₂气凝胶，对掺杂C₆₀-SiO₂气凝胶的红外吸收光谱、飞行时间质谱的测试表明C₆₀分子被成功地掺入SiO₂气凝胶中．室温条件下，在Ar⁺激光（488nm）激发下，观察到掺杂C₆₀-SiO₂气凝胶有很强的可见发光现象，发光峰位较纯C₆₀发光明显蓝移 关键词：     

CEMS和慢正电子束研究ZrO2(Y)中Fe的热动力学行为

用内转换电子穆斯堡尔谱（ＣＥＭＳ）和慢正电子束研究了含３％Ｙ₂Ｏ₃的ＺｒＯ₂中⁵⁷Ｆｅ离子（１００ｋｅＶ，３×１０¹⁶ａｔ．／ｃｍ²）注入态及其在氢气氛中退火的热力学行为．注入态以Ｆｅ³⁺，Ｆｅ²⁺和Ｆｅ⁰存在，它们分别是Ｆｅ³⁺-Ｖ（空位）复合体、二聚体和超顺磁颗粒．经４００，５００℃退火后，Ｆｅ³⁺-Ｖ分解，分别出现了α-Ｆｅ的前期相和α-Ｆｅ纳米颗粒．含Ｆｅ的ＺｒＯ₂（Ｙ）混合导电的出现可能是和Ｆｅ的不同价态及其相对含量有关 关键词：     

中红外光纤技术用于肿瘤在体原位诊断的研究

本文采用傅里叶变换红外光谱法与中红外光纤及ATR探头联用,首次实现了肿瘤组织的在体原位检测,即在有血液循环的活体组织中获得了具有很好信噪比的中红外光谱。实验结果表明在体原位的正常和肿瘤组织的光谱特征同我们先前液氮冰冻样品以及新鲜离体检测的结果是相似的,即符合液氮和新鲜离体样品研究中所得到的鉴别癌症与正常组织光谱变化规律,例如图1所列出的肠癌的原位在体光谱,与离体癌变组织光谱相似,这一创新结果表明中红外光纤-红外光谱仪联用可能发展成一种外科手术中无损、快速、准确的在体检测的方法。     

Femtosecond time-resolved difference absorption spectroscopy of all-trans-β-Apo-8′-carotenal

The femtosecond time-resolved difference absorption spectra of all-trans-βApo-8′-carotenal have been recorded and analyzed by the singular-value decomposition (SVD) method followed by global fitting using a sequential model for the excited-state energy relaxation. With this model, we have obtained the excited-state absorption spectra and the lifetimes of the corresponding excited states both in nonpolar solvent n-hexane and polar solvent methanol. Three excited states, namely S3(170fs), S2(2.32ps) and S1(26ps) in n-hexane, and two excited states S2 (190fs) and S1(9.4ps) in methanol have been observed. The excited-state absorption spectra of all-trans-β-Apo-8′-carotenal in methanol display a red shift and broadeness, while the lifetime of S1 state becomes shorter. It is proposed that these effects are related to the presence of a carbonyl functional group that leads to the solvent effect on the excited-state energy level. At the same time, it is shown that the SVD method is a useful tool in resolving the time-resolved absorption spectra.     

聚硅氧烷/甲基丙烯酸甲酯核壳结构复合粒子的制备

聚硅氧烷/甲基丙烯酸甲酯核壳结构复合粒子的制备;种子乳液聚合;核壳结构     

新型吡啶联吡唑双酰肼类化合物的合成及除草活性

以乙酰丙酮和溴乙酸乙酯等为起始原料,经取代、肼基化、环合、水解、酸化和缩合等反应合成了12个新型的吡啶联吡唑双酰肼类化合物(1a~1l),其结构经¹H NMR, ¹³C NMR和MS(ESI)表征。并研究了化合物的除草活性。培养皿法测试结果表明：用药量为200 mg·L^-1时,1j, 1k和1l对油菜的抑制率均为100%。盆栽法测试结果表明：苗后茎叶喷雾处理用药量为150 g·hm^-2时,1l对靶标杂草芥菜、繁缕的抑制率分别为80%和70%。     

Synthesis and Structure of the First Protonated Zincoborophosphate: (H_3O)Zn(H_2O)_2BP_2O_8·H_2O

IntroductionInthelastfewyearsthesearchfornewmaterialswithmicroporousandzeolite analogoussystemshasprimarilyfocusedonaluminumphosphatesandaluminosilicatecom poundssubstitutedwithavarietyofatoms .1 3 Cobalt sub stitutedaluminophosphatesaresystematicallystudiedmainlyduetotheirpotentialuseassolid acidcatalysts .Insuchmaterials ,theBr nstedacidsiteisgeneratedbyeachsubstitutionofAl(III)byCo(II)inwhichaprotonisneededtobalancethecharge .4 7Tofindnewtypeofze oliticmaterials ,theborophosphatemateri…     

Heteropolymolybdate as a New Reaction-controlled Phase-transfer Catalyst for Efficient Alcohol Oxidation with Hydrogen Peroxide

Aldehydes are very important raw materials or intermediates, which have widespread applications in the perfumery, pharmaceutical, dyestuff and agrochemical industries1. Oxidation of alcohol is one of the most frequently used synthetic reactions in the lab…