The First and Facile Synthesis of (±) Syringaresinol

The first and facile synthesis of (±)syringaresinol was described.     

涂膜超声及涂膜电解对固体表面铀的去污研究

制备了高分子可剥离去污膜液，确定了涂膜液中各组分最佳含量，对固体表面核素的去除研究结果表明：在金属表面采用涂膜电解去污、非金属光滑固体表面采用直接涂膜去污、非金属粗糙固体表面采用涂膜超声去污工艺，其去污率均可达99％以上，优于其他方法。     

meso-四(4-乙酰氧基苯)卟啉-铜(Ⅱ)-乳化剂OP体系荧光熄灭法测定微量铜(Ⅱ)的研究

本文研究了高灵敏的meso-四(4-乙酰氧基苯)卟啉[T(4-AOP)P]-铜(Ⅱ-乳化剂OP体系。在酸度为pH5.0～5.6范围内形成的三元络合物可引起T(4-AOP)P-OP荧光强度的定量熄灭,其Ex=413nm,EM=656.9nm,Cu(Ⅱ)浓度在0～0.150μg/ml范围内有良好的线性关系,回归方程F=25.51-8.45m,试验了14种离子的干扰影响,并用此法测定了小球藻中Cu的含量,回收率达96～104％。     

烯丙基钯催化区域选择性氧化制备甲基酮的研究

报道了以氯化钯作催化剂，区域选择性氧化９－烯丙基－１－氧代－４－氮杂双环（４．３．０）壬烷及１０－烯丙基－１－氧代－４－氮杂双环（５．３．０）癸烷，制备了９－丙酮基－１－氧化－４－氮杂双环（４．３．０）壬烷及１０－丙酮基－１－氧代－４－氮杂双环（５．３．０）癸烷。比较了不同催化条件和溶剂系统的反应收率，发现以ＰｄＣｌ２／对－苯醌为催化系统和以含水的ＤＭＦ溶剂系统氧化收率最高。     

HAMILTONIAN SYSTEM AND SIMPLETIC GEOMETRY IN MECHANICS OF COMPOSITE MATERIALS (Ⅱ)——PLANE STRESS PROBLEM

Fundamental theory presented in Part (I)^[8] is used to analyze anisotropic plane stress problems. First we construct the generalized variational principle to enter Hamiltonian system and get Hamiltonian differential operator matrix; then we solve eigen problem; finally, we present the process of obtaining analytical solutions and semi-analytical solutions for anisotropic plane stress problems on rectangular area.     

Synthesis and Crystal Structure of Two Diflunisal Carboxamides

Graphical abstract  

The title compounds, 2′,4′-difluoro-4-[(4-methylbenzoyl)oxy]-N-[4-nitro-3-(trifluoromethyl)phenyl]-[1,1′-biphenyl]-3-carboxamide 2a and 2′,4′-difluoro-4-[(4-chlorobenzoyl)oxy]-N-[4-nitro-3-(trifluoromethyl) phenyl]-[1,1′-biphenyl]-3-carboxamide 2b, synthesized from diflunisal, a registered anti-inflammatory drug, via amidation of carboxlic acid and esterification of phenolic hydroxy group, were confirmed by single- crystal X-ray diffraction showing their packing are stabilized by intermolecular hydrogen bonds      

立方氮化硼薄膜的气相沉积及过渡层对其附着性能的影响

本文采用非平衡磁控溅射物理气相沉积工艺，在单晶硅基片上合成了立方氮化硼薄膜，并且通过采用过渡层提高了立方氮化硼薄膜的附着力，过渡层分别是碳化硼(B4C)薄膜以及碳化硼(B4C)薄膜与B-C—N梯度层的复合层(B4C／B—C—N)。同时，不同过渡层的存在使立方氮化硼薄膜的剥落机理产生变化。     

与星象函数有关的拟共形近于凸调和映射

讨论了一类解析部分为星象函数的拟共形近于凸调和映射的基本性质,得到了此类映射的系数不等式、积分表达式、增长定理、面积定理与部分和的近于凸半径.     

Concise total synthesis of AB5046A and AB5046B

Two naturally occurring rare 5-oxo β-triketones, AB5046A and AB5046B, were efficiently synthesized in five linear steps with overall yields of 36% and 28%, respectively. The synthetic strategy highlighted the readily preparation of the key intermediate, 3-ethoxy-5-hydroxycyclohex-2-enone, from commercially available phloroglucinol.