微酸性

It was found that Pd-Co/active carbon catalyst was the optimal catalyst, and Pd-Co/γ-Al2O3 was also good, but silica and kieselguhr were not proper carriers for the object reaction, because of their stronger surface acidity, which could result in the formation of polymer, jammed the micro pores of catalyst, and then resulted in its deactivation. Addition of Bi, Ce and Cu promoters could not improve the activity of catalyst, but La and Ba promoter could enhance the activity of catalyst apparently, and the Co was the best promoter, especially Co was impregnate in advance. It was attributed to that the pre-impregnated Co may occupy the micro pores of active carbon, and cover some bad functional groups on the surface of catalyst, so that the active and selectivity of catalyst could be enhanced obviously.

研究结果表明，Pd-Co/活性炭催化剂是目标转移加氢反应的最适宜催化剂，Pd-Co/γ-Al203效果也较好，而硅胶和硅藻土由于表面酸性较强，容易造成生成聚合物而堵塞催化剂微孔、使催化剂迅速失活；此外，添加Bi、Ce、Cu等助剂时对活性并无改善作用，而添加La和Ba助剂时可使Pd的催化活性有所提高，效果最好的是Co助剂，尤其是先浸渍Co的Pd-Co/C催化剂，原因是Co占据了活性炭的微孔、覆盖了某些对目标反应不利的官能团，使其活性和选择性都有较大幅度的提高。

The dissolubility of PPLA in water was (2.16～4.32)×10－2 mg·mL－1 according to eye judgment. The critical micelle concentration was 2.16×10－2 mg·mL－1 obtained from a fluorospectrophotometer. The self-assembled aggregates of PPLA in water were nanoscale spheres observed by a transmission electron microscope. The particle size and zeta potential tests by dynamic light scattering revealed that during preparation, the ratio of hydrophilicity/hydrophobicity, the aqueous medium and the pH had great influences; while dilution, freezing and pH change to basic condition had no effect after preparation, but pH change to acidic condition made the nanoparticles precipitate.

目测法得到其溶解度为(2.16～4.32)×10－2 mg·mL－1；荧光法得到聚合物的临界胶束浓度为1.12×10－3 mg·mL－1；透射电子显微镜观察显示该聚合物在水中的自组装聚集体为纳米级球形；动态激光光散射测试微球的粒径和Zeta电位发现，在微球的制备过程中，聚合物的亲/疏水性比例、水相介质及水溶液的pH值对它影响显著；而制备后，稀释和冷冻对它无显著影响，改变微球的环境pH值至酸性，出现聚集，至碱性无影响。

This paper studies the microencapsulation of particles of ultramarine pigment by an acid resistant clorless shell. The surface of the particle is covered and this gives the ultramarine pigment acid resistance.

对群青颜料粒子进行了微胶囊化研究，在其表面包覆一层无色耐酸壳膜，使其具有耐酸性，分析了影响胶囊化群青的耐酸性及色差的各种因素。

In addition, there are bond areas between the new and the primary coverage because of the growing up of the plating coat, which may lead to the emergence of micro crack on the coating owing to such causes as too big or uneven impact during plating process, little distortion of global granular zinc dust inside the plating coat, less tight coalescence of the zinc dust flecks.

由于形成镀层的过程处在酸性环境，在镀层增厚过程中不可避免把酸性溶液包裹在镀层里面，酸性溶液会与金属基体和镀层反应，产生氢气，必然会寻找通道选出，形成微气孔；镀层是逐渐形成的，新生镀层与原有镀层之间存在结合面；镀覆过程由于撞击力过大或者不均匀，镀层内部球形颗粒状锌粉变形较小，球形颗粒与球形颗粒的结合不严密等，这些原因会导致镀层产生微裂纹。

Compare to the strong acidic soil and feeble alkalic soil condition, the effect of alkalic soil on the garlic were relative great.

同时，比较强酸性条件与微碱性条件，微碱性土壤对大蒜的生长发育和产量质量形成的影响最大，表现为明显的抑制作用。

The invention discloses a dielectric hole-microhole composite material and synthesizing method in the inorganic porous material, adsorbing material and catalytic material technical domain, which comprises the following steps: adopting zeolite molecular sieve as raw material; reacting with sodium bisilicate solution under 30-60 deg.c for 10-300 min; disintegrating particle part of zeolite molecular sieve into piece with microhole structure; adding cetyl trimethyl ammonium bromide as molder; adjusting pH value of mother liquid to 10-12; aging 1-8h; adding in the high-pressure autoclave to do water heat synthesizing reaction at 80-130 deg.c for 24-72h; separating solid; washing; drying; sintering under 500-600 deg.c for 5-10h; obtaining the Si-Al porous material with dielectric hole and microhole composite structure.

本发明属于无机多孔材料、吸附材料和催化材料技术领域，涉及具有介孔-微孔复合材料及其合成方法。其特征是以沸石分子筛为原料，用偏硅酸钠的水溶液在30～60℃反应10～300分钟，使沸石分子筛的颗粒部分解离形成具有微孔结构的碎片，加入模板剂十六烷基三甲基溴化铵，然后调节母液pH值为10～12，老化1～8小时，然后加入高压釜于80～130℃进行水热合成反应。反应24～72小时后，分离出固体，水洗、干燥，然后于500～600℃焙烧5～10小时，得到具有介孔和微孔复合结构的硅铝多孔材料。本发明的效果和益处是所发明的合成方法可用于合成多种沸石结构和介孔结构的复合材料，所合成的材料经过质子交换可以具有较强的酸性，在吸附和催化领域具有广泛应用前景。

Studies on the release kinetics of microencapsulated garlic granulates in vitro in simulated intestinal fluid indicated that release of garlic powder can be controlled in intestine by the human stomach condition, which it passes through scanning electron microscope revealed that wall materisals are of good integrity, and core materials are well embedded in the microcapsules.

结果发现其可以通过胃的酸性环境而在肠道内释放，扫描电子显微镜观察发现微胶囊化蒜粉颗粒表面壁材结构具有很好的完整性和致密性，芯材很好地包埋于微胶囊中。

A process for chemical polishing of red copper in a weakly acid FeCl3-HCl bath was studied.

研究了紫铜在FeCl3–HCl微酸性体系中化学抛光的工艺。

Since there are real demands to the fine powder of expansible graphite in the market, it was studied that glacial acetic acid were inserted into 2μm5μm micro-graphite using potassium dichromate, potassium permanganate, or ammonium persulphate as oxidant and acid as medium to get FPEG low expansible volume successfully.

针对目前对低膨胀容积的可膨胀微粉石墨的实际需求，本论文研究了在酸性条件下，以重铬酸钾、高锰酸钾或过硫酸铵为氧化剂，成功地将冰醋酸插入2μm5μm石墨层间，制得低膨胀容积的可膨胀微粉石墨。

The probe of chip includes the entire genomic DNA of at least ten thiobacillus ferrooxidans, at least two thiobacillus acidophilus sulfur oxides, at least one eosinophils thiobacillus, at least one acidithiobacillus albertensis bacteria, at least six thiobacillus oxidation of ferrous - Lo, at least eight heterotrophic bacteria acidophilus, at least one metal leaf sulfur bacteria, at least one Acidianus tengchongensis, at least a Metallosphaera sedula and at least two of thermophilic bacillus curing.

该芯片的探针包括至少10株氧化亚铁硫杆菌、至少2株嗜酸氧化硫硫杆菌、至少1株喜温嗜酸硫杆菌、至少1株Acidithiobacillus albertensis菌、至少6株氧化亚铁微螺菌、至少8株异养嗜酸菌、至少1株金属硫叶菌、至少1株嗜酸两面菌、至少1株勤奋金属球菌和至少2株嗜热硫化杆菌的全基因组DNA。这种芯片，能够检测酸性环境中丰度较低的微生物，具有高通量、同时、快速、准确、灵敏地分析酸性环境中微生物群落组成的优点。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。