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A process and etchant gas composition for anisotropically etching a trench in a silicon nitride layer of a multilayer structure and an etchant gas composition.

要約 一种在多层结构的氮化硅层中各向异性地腐蚀沟槽的工艺和腐蚀剂气体组分。

The results showed that the microbial community could degrade 39.6% of rice straw gross weight within five days. When the culture medium volume was 1/5 of the whole and pH at 6 on the 5 days culture, the CMC reached the highest of 14 IUml^(-1). During the rice straw degradation, more than ten kinds of products were detected using GCMS. DGGE detected the dynamic change of microbial community composition, and the microbial composition changed greatly in different periods. The phylogenetic tree derived from 16s rDNA sequence was found that the closest relatives belong to Clostridium sp., Brevibacillus sp., Bartonella sp.、Bacteroidetes sp.

5d后稻秆总减重量达到39.6%，在培养基占总体积1/5、pH=6、培养第5天时纤维素内切酶活性表现最高，达到14IUml^(-1)；培养过程中发酵液中有10余种挥发性产物，且不同时期产物的种类和浓度变化很大，从DGGE图谱发现在培养不同时期菌种组成有很大差异，通过各条带近缘种16s rDNA扩增信息构建系统树可见，各条带近缘种分别归属Clostridium、Brevibacillus、Bartonella、Bacteroidetes4个属。

The analysis of the chemical composition of mineral inclusions including olivine, garnet, clinopyroxene, and chromite from Mengyin and Fuxian diamonds, reveals that the major elements of mineral inclusions in diamond show characters with high depletion in basaltic composition.

对山东蒙阴、辽宁复县两地金刚石中包裹体矿物包括橄榄石、石榴石、单斜辉石和铬铁矿的化学成分进行了深入分析，金刚石包裹体矿物的主量元素显示华北地台至少在古生代金伯利岩侵位时具高度亏损玄武质的难熔克拉通岩石圈地幔特征。

The data of chemical composition and phase analysis showed that the principal mineral composition of Smecta is Ca Na based montmorillonite,i.e.,dioctahedral smectite.

思密达为天然消化道粘膜保护剂，白色或浅黄色粉剂，临床应用于食管炎、腹泻、胃炎、结肠炎、功能性结肠病等疾病的治疗。

The crystalline composition, microstructure and mechanical properties of experimental lithium disilicate glass-ceramic and IPS e.max Press were compared. No obvious difference in mechanical properties and crystalline composition was found between these two materials.

对比分析了实验二硅酸锂玻璃陶瓷和IPS e.max Press玻璃陶瓷的晶相组成，微观结构和机械性能，探讨了微观结构与性能的关系，并对牙科二硅酸锂玻璃陶瓷的自增韧机制进行了分析。

Dolomitic lime serves as a buffering agent for the hazardous waste composition by maintaining the pH of the waste composition within a target range over which solubility of several heavy metals tends to be minimized.

白云石灰的作用是作为危险废弃物组合物的缓冲剂，其使废弃物组合物的pH值保持在目标范围内，重金属的溶解度在该pH内最小。

The biggish difference of diet composition in different stage to Engraulis japonicus may be the primary reason that lead to difference of fatty acid composition among different stages.

由于鳀鱼在不同阶段饵料组成有较大的差别，这可能是造成不同阶段鳀鱼脂肪酸组成差异的重要原因。

Methods: Choose capsaicin which is the main composition of pungent and hot Fructus Capsici Frutescent, and menthol which is the main composition of pungent and cool mint to make into the external application respectively.

目的：观察药物的性味在穴位贴敷疗法中的作用。

Then the utilization solvent parting method, low pressure silica gel separation method and so on column chromatograph, opposition silica gel, glucosan gelatin chromatograph, pocket resin, carries on the chemical composition to the effective spot the system separation; The chemical composition obtains which to the separation carries on the structure appraisal with four big spectra.

然后运用溶剂分离法、低压硅胶柱色谱、反相硅胶、葡聚糖凝胶色谱、大孔树脂等分离手段，对有效部位进行化学成分的系统分离；对分离得到的化学成分用四大光谱进行结构鉴定。

Degradation test in vitro was carried out in phosphate buffer solution (0.1M, pH7. 4) at 37 ℃. The buffer solution was changed daily. Degradation test in vivo was implanted the sample to subdermal in adult ICH rat in the scapular area lateral to the dorsal midline. At suitable time the samples were recovered. Molecular weight changes in surface layer and bulk of polymer sample were measured by GPC and weight loss was determined gravimetrically. It was found that the degradation behavior can be regulated by changing the composition of copolymers. The critical compositions from surface to bulk degradation behavior for PGCA, PLCA, PLMCA, PLDCA systems were 15-20, 20-30, 30- 40, 40 of mol percent GA or LA unit in copolymers, respectively. The degradation behavior of PGCA, PLCA, PLMCA, PLDCA systems were compared and analysed. Some factors influencing the degradation character, such as copolymer composition, hydrophobicity, crystallinity and enzyme affect etc. played important role.

体外实验中材料降解环境为37℃，0.1M，pH7.4磷酸缓冲溶液，每天换液，定期取样；体内实验中将聚合物试样埋置于ICH小白鼠背部肩胛骨皮下部位，定期处死小鼠，取样，将体内体外样品进行重量损失及试样内外层分子量变化测定，分析各聚合物试样降解行为特性，实验结果证明，改变共聚物组成，可以调节各聚合体系降解行为特性，对PGCA，PLCA，PLMCA，PLDCA共聚体系，交酯摩尔百分含量15-20％，20-30％，30-40％，40％分别为各体系内降解行为特性由表面降解型向本体降解型过渡的临界转折点，交酯含量较低的聚合物不同程度地表现表面降解行为特性，论文对各共聚体系体内外降解行为作了分析对照，例如共聚物组成对材料降解速度与降解行为的影响；生物体内酶对降解行为的影响；材料亲疏水性，聚合物链段结晶行为及碳酸酯结构对材料降解行为的影响等，得出交酯/环碳酸酯共聚体系降解行为一些共性和规律。

I hope that this success is just the first in a long series.

我希望这只是成功的开始。

Three dimensional stresses on the interface of tire and soil, tire deflection and soil sinkage are measured.

测试轮胎——沙土界面上的三向应力、轮胎变形和沙土沉陷；建立考虑剪切应力对沙土承载特性产生影响的车轮牵引性能预测模型；分析车轮作用下土壤的纵向稳定性。