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This technics can distinct improve the ratio of taking off acetyl and the ratio of the Chitosan output.

在总结并完善国内外各种壳聚糖生产工艺的基础上，本公司研制出酶法生产壳聚糖工艺，该法大大提高了脱乙酰比率及壳聚糖的生成比率。

Novel chitosan derivative with long alky groups as the hydrophobic moieties and carboxymethyl groups as the hydrophilic moieties was synthesized. The chemical structure of N-octyl-O, N-carboxymethyl chitosan was characterized via FTIR, 1H NMR and elemental analysis. The physical properties were analyzed with wide angle X-ray diffraction and differential scanning calorimetry.

以天然可生物降解的壳聚糖为原料，通过在壳聚糖6位羟基上引入羧甲基，在2位氨基上引入疏水烷基链，制得N-辛基－O，N-羧甲基壳聚糖两亲性衍生物，分别用FTIR、1H NMR和元素分析等技术对其结构进行表征，用广角X射线衍射和差示扫描量热法对具物理性质进行分析，并考察其在各种溶剂中的溶解性能及其对难溶性药物的增溶能力。

MATERIALS: Composite scaffold was made with collagen/chitosan/β-tricalcium phosphate. Upper layer was mainly collagen/chitosan, and lower layer was mainly collagen/chitosan/β-tricalcium phosphate. The factor of porosity was 90%, with antilinear of 100 μm.

材料：以胶原、壳聚糖、β-磷酸三钙制备复合支架，上层以胶原／壳聚糖为主，下层以胶原／壳聚糖／β-磷酸三钙为主，孔隙率≥90%，孔径100μm。

The invention concerns a burner comprising a premix designed to produce a flammable air-fuel mixture, said burner including a vortex generator, wherein are provided two complementary burner shells forming a passage body, having each a first half-cone burner shell section (1) and delimiting together a turbulence chamber, widening in the axis in the form of a cone, as well as tangential air intake slots in the axial longitudinal direction of the cone.

描述了一种用于产生可点燃的燃料-空气混合物的预混燃烧器，该预混燃烧器具有涡流发生器，该涡流发生器设置了至少两个对穿流本体进行补充的燃烧器壳，所述燃烧器壳分别具有构造为分锥形状的第一燃烧器壳区段(1)并且共同限定着在轴向上按锥形方式扩展的涡流室并且限制着所述沿轴向的锥体纵向伸展方向相互相切的进气缝隙。

The reason of white band formation in the solidified shell in the mold has been studied by means of water modeling test and the analysis of the solidified microstructure of practical CC slab an.

为了定量把握结晶器中的钢水流动、钢水过热度及结晶器传热阻力对初期凝固坯壳的凝固不均一的影响，利用水冷铜板的浸渍实验，测定了各种铸造条件下的凝固坯壳厚度、凝固不均一度及树枝晶偏角；利用水力模型实验，并对实机铸坯的凝固组织分析，EPMA对负偏析带的线分析，得出了在结晶器中凝固坯壳上负偏析带的产生原因。

Esp., most of the paddy rice, straw, rice leaves, rice husks, timber components, saw dust, reed and reed basketwork, rope and various plant stems and leaves, fruits etc. were in bright colors; among the paddy rice remains, the embossed veins and palea on the surface of some rice husks were also as clear-cut as original, so it was with a small amount of whole rice that connected the straw and ears of rice; there were some deposits mixed by rice husks, straws and rice leaves etc. crossed in several small layers under Layer 3, some looked like current objects, people would have such illusion that these were just fallen down on earth yesterday upon uncovering and could hardly believe that they were from thousands of years ago.

特别是，如稻谷、稻杆、稻叶、谷壳、木构件、木屑、芦苇及其编织物、绳子，以及各种植物茎叶、果实等等，多数色泽新鲜；水稻类遗存中，有的谷壳表面的隆脉和稃毛也清晰如初，还有稻杆与稻穗连在一起的少量整株水稻；第3层下数小层相间夹杂的谷壳、稻杆和稻叶等的混合堆积物，有的如同现时之物，刚揭开时真还会有一种昨天刚倒掉时的错觉，几乎无法相信它们是数千年前的物品。

BIVALVES/NONTRADITIONAL SPECIES: In France, overall demand for bivalves was poor in June. This month, as a consequence of the holiday season, demand is decreasing in the main cities and is increasing along the coast.

双壳贝类/非传统水产品：在法国市场，6月份双壳贝类的整体需求量偏低。7月份，由於假期的到来，一些主要城市和沿海城市的双壳贝类需求量下在增加。

Put 3g chitosan into 50mL 1% CH3COOH solution, after dissolved completely, added 9mL H2O2 into this solution and the reaction took place at temperature of 80℃ for 3 hours. Filtrated the hydrolysate and then concentrated liquid to 20mL, neutralized liquid with 1% NaOH, added 200mL ethanol to extract hydrolyte, 3000r/min eccentricity, and then we could got all water-soluble canary yellow chitosan by vacuum-freeze drying.

称取3g壳聚糖，于50mL1%冰乙酸溶液中充分溶解，加入9mL过氧化氢，在80℃条件下水浴反应3h，水解液抽滤，滤液在60℃浓缩至20mL左右，1%NaOH中和后，加入体积比为10：1左右的无水乙醇，沉淀水溶性壳聚糖，3000r/min离心，将糖液真空冷冻干燥后可得淡黄色完全水溶性壳聚糖。

The Company is also an extension of the Department of Product Example: chitosan 1, chitosan is from natural marine biological preparation of chitosan modified by carboxylation and made soluble in water.

本公司还延伸系例产品：壳聚糖 1、壳聚糖系从天然海洋生物制备的壳聚糖经羧化改性而制成，易溶于水。

Weak formulation of equilibrium equations including boundary conditions of laminated cylindrical shell are presented, and thermal stresses mixed state equation for axisymmetric problem of closed cantilever cylindrical shell is established.

导出层合柱壳轴对称问题的平衡方程和边界条件的弱形式，提供了方程和边界条件放在一起的算子形式，建立了悬臂柱壳轴对称问题的热应力混合方程，给出了正交异性层合悬臂柱壳在热荷载和机械荷载作用下的弱形式解·本文提出的方法弱化了求解方程和边界条件，化解了问题，具有一般性并便于推

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。