酯胶

The carbonaceous alcosol and the silica alcosol were prepared respectively by using aqua-mesophase and tetraethoxysilane as starting materials. Then the two alcosols were mixed and dried in open air and under supercritical fluid conditions to form binary carbonaceous-silica xerogel powders and aerogel powders respectively.

以正硅酸乙酯和炭质水性中间相为原料，分别制得了炭质醇溶胶和硅醇溶胶，将二者进行混合后再利用常压干燥法和超临界流体干燥法分别制备了二元炭质-二氧化硅干凝胶和气凝胶粉末。

Algin ; carrageenan ; mannuronic acid ; guluronic acid ; polysaccharide ; sulfate ; aluminium ; peptic ulcer

褐藻胶；卡拉胶；甘露糖醛酸；古罗糖醛酸；多糖；硫酸酯；铝；消化性溃疡

The approach of preparation method is that, first, blend yttria into hot aquafortis, add silicone grease chemical compound after reaction, cool it to form gel. Second, heat the gel for 1-48 hours to acquire solid fruitage. Third, igloss the fruitage in reducing gas for 1-48 hours. Forth, add anorg and then igloss it in reducing gas for 1-48 hours in the temperature between 800-1600 degree.

它的制备方法，包括以下步骤：1将氧化钇溶入热浓硝酸中，反应后加入硅酯类化合物，恒温形成凝胶；2凝胶加热1-48小时，得到固相产物；3在还原气氛中灼烧1-48小时；4加入无机盐，在800-1600℃范围内，还原气氛中灼烧1-48小时；5稀酸洗涤，干燥后得到稀土激活Y2SiO5荧光粉。

For most piercing-sucking insects, they will secrete gell saliva and watery saliva when they feed on plants. The gell saliva will be secreted at the early stage of feeding to form salivary sheath, which is supposed to surround and protect the stylet. This saliva can help piercing-sucking insects to feed on plants directly and indirectly. Meanwhile, the watery saliva contains many components like pectnase, cellulose, polyphenol oxidase, peroxidase, alkaline phosphatase, sucrase, etc. These components can help piercing-sucking insects in plant tissue penetration, food digestion, detoxification of plant secondary substances and break-down of plant defence reaction.

对多数刺吸式昆虫而言，他们取食时会分泌胶状和水状两种唾液，其中胶状唾液会在取食早期分泌形成唾液鞘来围绕并保护口针，通过直接和间接的作用来帮助取食；而水状唾液中则包含了果胶酶、纤维素酶、多酚氧化酶、过氧化物酶、碱性磷酸酯酶、蔗糖酶等组分，来帮助刺吸式昆虫对植物穿刺、消化食物、解毒次生物质并破坏植物的防御反应。

The results show that the hydrofluoric acid is a effective catalyst for the gel formation.

以正硅酸乙酯为硅源，分别以HF和HF/氨水为催化剂，通过溶胶-凝胶法常压制备SiO2气凝胶。

G. polyhydroxyethyl methacrylate and polyvinyl alcohol. Some potential development and application of the materials are discussed tentatively.

胶原蛋白和一些合成高分子化合物(如聚甲基丙烯酸羟乙酯，聚乙烯醇等)，作为生物材料已得到广泛的应用，而两者形成的复合材料水凝胶具有良好的生物相容性和理化性质，是一类新型的生物材料，具有很大的研究和应用价值。

Products include a variety of specifications of agar, carrageenan, konjac gum, CMC, Monoglyceride, xanthan gum and soy protein isolate......

产品包括各种规格的琼脂，卡拉胶，魔芋胶，CMC，单甘酯，黄原胶和大豆分离蛋白。。。。。。

The porous SiO2 xerogels with controlled structure were obtained from TEOS in the presence of PEG by sol-gel method.

采用溶胶-凝胶法，以正硅酸乙酯为前驱体，以不同分子量的聚乙二醇为改性剂，制备结构可控的多孔SiO2干凝胶。

SiO2 aerogels were produced from TEOS as silicon resources by sol-gel method and surface modification at ambient pressure.

以正硅酸乙酯为硅源，采用溶胶－凝胶法和表面修饰工艺，在常压条件下制备了SiO2气凝胶。

An improved chemical method for the determination of the molar substitution degree of hydroxyethyl guar gum has been described.

本文用模型小分子一缩二乙二醇的醚键断裂实验证明了可行性，羟乙基瓜尔胶上的羟乙基链段与过量对甲苯磺酸-乙酸酐在130℃下反应14hr，醚键完全断裂生成酯，并在pH=11条件下煮沸1hr使酯完全水解，转变为乙二醇。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。