中心下陷的负色散光纤

利用非等温等离子体化学气相沉积成功制得了具有折射率中心下陷的负色散光纤 (RDF)。该光纤在保持较好的抗弯曲性能与偏振模色散的同时 ,有效面积达到 4 5 μm2 ,且在 15 5 0nm处的色散为 - 19.6 5ps/(nm·km) ,色散斜率为 - 0 .132ps/(nm2 ·km)。此外 ,通过优化光纤纤芯各层的掺杂原子浓度 ,在 15 30nm处光纤的氢损降到了0 .0 1dB/km。由负色散光纤与具有超大有效面积的非零色散位移光纤 (ULAF)组成的色散管理光纤对在 15 30nm到16 2 5nm波长范围内的色散斜率小于 0 .0 0 6ps/(nm2 ·km) ,且最大色散值小于 0 .2ps/(nm·km)。同时 ,15 5 0nm波长处的衰耗为 0 .2 2 4dB/km ,且在 15 30nm到 16 2 5nm波段范围内衰耗较为平坦。该色散管理光纤对可以在无需色散补偿模块的前提下应用于大容量高速率的长距离波分复用 (WDM)系统。     

新型含酯基的可生物降解聚碳酸酯的合成

通过2，2-二羟甲基-丙二酸二甲酯与氯甲酸乙酯的反应合成了环状碳酸酯单体5，5-二甲氧羰基-1，3-二氧六环-2-酮，再以异辛酸亚锡为催化剂，在不同温度下进行本体开环聚合，得到新型含酯基的聚碳酸酯．单体和聚合物结构经红外光谱(IR)、核磁共振氢谱(1^H NMR)及核磁共振碳谱(^12C NMR)表征．结果表明，开环聚合反应的产率和分子量随温度的升高而增加，但温度高于100℃时开环聚合会发生一定程度的脱羧反应，研究得出该聚合反应合适的反应条件为：反应温度90℃，反应时间12h，聚合过程中基本无脱羧反应发生。     

Viscosity Solutions of Monotonic Functional Parabolic PDE

In this paper,by the technique of coupled solutions,the notion of viscosity solution is ex-tended to quasi-monotonic fully nonlinear parabolic equations with delay,which involves many modelsarising from optimal control theory,economy and finance,biology etc.The comparison,existence anduniqueness are proved.And the results are applied to the retarded Bellman equations.     

具有附益性的形态塔式变换及其应用

在塔式变换的基础上，将具有附益性的形态算子作为塔式变换的分析与综合算子，在完备格上建立了具有附益性的形态塔式变换的表示定理，其重要意义在于将具有描述图像几何特征的形态算子理论溶入到多分辨技术中，从而获得了一种构造非线性塔式变换的基本途径．从理论上说，本文将已有结论进行了推广和扩展，得出了多尺度形态分析及综合算子的构造性表示方法；从应用上说，为图像处理提供了一种具有多尺度功能及保形特征的形态变换方法．     

Enzymatic Synthesis of a CCK-8 Tetrapeptide Fragment

The enzymatic synthesis of a tetrapeptide Phac-Met-Gly-Trp-Met-OEt is reported. It was synthesized by coupling Phac-Met-OEt with Gly-OMe. HCI, Trp-OMe and Met-OEt successively, catalyzed by α-chymotrypsin, papain and α-chymotrypsin respectively. The results of FAB-MS showed that the products had the correct molecular mass.     

MICROWAVE-ASSISTED SURFACE MODIFICATION OF CALCIUM BICARBONATE

Surface modification of calcium bicarbonate powder with isopropyl triisostearoyl titanate (TTS) by microwave-assisted heating was studied in the present work. The features of microwave treated powder show obvious superiority to those of powder samples treated by traditional surface modification method and of untreated calcium bicarbonate in suspension turbidity, suction potential, contact angle with water, and mechanical properties of their composites with PVC resin.     

拟南芥高盐耐受突变体的筛选与鉴定

采用floral dip方法，将雌激素诱导激活标签系统PER16ACT转入拟南芥中，最终获得了18000株T-DNA插入株系．通过挑取能够在250mmol／L NaCl条件下萌发的拟南芥突变体，从200000粒该突变体库T2代种子中筛选到一株高盐耐受性突变体hst1(highs salt tolerant 1)，进一步分析表明hst1在种子萌发阶段和幼苗生长阶段都对NaCl具有耐受性，在没有盐胁迫的条件下，hst1同野生型没有明显的区别。     

丙酸睾丸素的吸附阴极溶出伏安法研究

在ｐＨ为６．０的Ｂ－Ｒ缓冲溶液中，丙酸睾丸素于电位－１．４Ｖ（ｖｓ．ＳＣＥ）左右处出现一个灵敏的附阴溶出峰。经５ｍｉｎ富集后，阴极溶出峰电流与浓度在１．３８×１０＾－＾８－７．３×１０＾－＾８ｍｏｌ／Ｌ范围内成线笥关系，该方法用于注射液中丙酸睾丸素含量测定，回收率８０％－８６％。检测下限为４．１×１０＾－＾９ｍｏｌ／Ｌ。     

配位交换色谱在α-氨基酸光学拆分上的应用

对以不对称配位树脂为固定相,利用配位变换色谱拆分DL-氨基酸的国内外进展,进行了扼要的综述。     

Thermokinetic Study on the Reversible Competitive Inhibition of Bovine Liver Arginase

Introduction Arginase (EC 3.5.3.1) is a widespread and very im-portant enzyme in mammals, which specifically cata-lyzes the hydrolysis of L-arginine to urea and the non-protein amino acid L-ornithine, a key step in the urea cycle.1 Urea is the principal metabolite for disposal of nitrogen as a neutral and nontoxic waste product formed during amino acid metabolism in mammals. L-ornithine serves as a biosynthetic precursor to L-proline and the polyamines such as putrescine, sper-mine (in eucar…