查询词典 molecular separation

The molecular structures of APSP were identified. BAW was selected as the eluent of GC through TLC. After separation and purification, two anthocyanins were obtained.

本文对APSP组分进行了研究，首先通过薄层层析实验选定以BAW体系为柱层析洗脱剂，然后对APSP进行分离纯化，得到两种相对含量较高的组分Ⅰ和Ⅱ，并对组分Ⅰ和Ⅱ进行了一系列结构鉴定实验。

In order to cutting down the cost, flocculation of recombined Erwinia carotovora-Eccl3B cell from broth, influence of temperature, pH and oxidants on the separation of PHB were studied; and the method which measure the molecular weight of PHB by intrinsic viscosity was also studied; furthermore, a phenomenon was found that insolubility of PHB in chloroform can be changed by pretreated at over 120℃ for the fist time, and the mechanism of this phenomenon was explored.

为了降低成本，提高生产效率，本文针对发酵法生产PHB过程中存在的，发酵液难以分离沉淀，非有机溶剂提取PHB时分子量严重降低等问题，进行了发酵液的絮凝，及温度、pH、氧化剂对提取PHB影响的研究。并对粘度法测定PHB分子量的方法进行了研究，同时，对于研究过程中发现的，加热后PHB在三氯甲烷中的溶解性变化及其原因进行了探索。

The results show that jamesonite and pyrrhotite have good floatability in the pH range of 2-10 and marmatite has good floatability in the acid and it is difficult to separate these minerals. In the pH range of 6-8, the separation of jamesonite and pyrrhotite, marmatite is possible when using mercaptoacetic acid and mercaptoethanol as depressants. In case of the presence of Cu2+ ion, however, it is difficult to separate the three minerals. Infrared spectrum demonstrates that there are a number of function groups such as —SH,—COOH,—OH in the molecular structure of depressant.

结果表明：用丁黄药作捕收剂，脆硫锑铅矿和磁黄铁矿在pH 2~10范围内都有良好的可浮性，铁闪锌矿在酸性条件下可浮性好，三者分离困难；在pH 6~8之间，采用巯基乙酸和巯基乙醇作抑制剂，脆硫锑铅矿与磁黄铁矿和铁闪锌矿的分离是可能的；但铜离子存在时， 3种矿物之间的选择性分离是难以实现的。

Objective: To study the source of the separation of our hospitals to methicillin-resistant Staphylococcus aureus in molecular epidemiology of the characteristics, identify MRSA clinical isolates in our country, investigate the distribution characteristics of staphylococcal chromosomal cassette mec typing of MRSA and detect the Panton-Valentine leukocidin virulence gene of MRSA.

目的：研究我国医院来源分离到的耐甲氧西林金黄色葡萄球菌的分子流行病学特征，鉴定我国临床分离的MRSA，分析MRSA葡萄球菌染色体mec盒基因型，检测MRSA的PVL毒力基因。

In the technical scheme of the invention, reactant, ammonia and hydrogen peroxide are ordinally added into the reaction system of catalyst containing Ti-MWW-F molecular sieve and solvent, and after stiring, temperature raising and reaction are finished, an oxime product is produced by filtering, distillation, liquor filtering and separation.

本发明的技术方案是将反应物酮或醛、氨、过氧化氢依次加入到含Ti-MWW-F分子筛的催化剂和溶剂的反应体系中，搅拌，升温，反应结束后，经过滤，蒸馏滤液，分离得到产物肟。

Highquality hydrogen for industry uses,dilute nitric acid,refined nitric acid,calcium nitrate tetrahydrate,calcium nitrate dihydrate,corrugated metal structured packing,catalyst for polyethylene,ultrahighmolecular weight polyethylene,15N labelled compounds,purificants of petrochemical industry,highmolecular flame retardants,molecular sieve desiccant,chemical machinery and equipment,separation equipment for chemical industry,testing and monitoring analyzers,detectors and equipment.

工业用优质氢，优质硝酸，硝酸钙，硝酸钙，金属规整波纹填料，聚乙烯催化剂，超高分子量聚乙烯，N15标记化合物，石化净化剂，高分子材料阻燃剂，分子筛干燥剂，化工机械和设备，化工分离设备，化工检测设备。

PCR-DGGE technology is a very important analytical tool with the development of molecular biology. Comparing with the traditional identification methods, PCR-DGGE technique is fast and easy to operate. The technology can also achieve the effect of separation for Unculturable microorganisms. Thus, the technology is widespread concern and attention in microbial ecology.

PCR-DGGE技术是随着现代分子生物学发展起来的一种很重要的分析手段，与传统的种群鉴定方法相比，PCR-DGGE技术具有快速和操作简便等优点，对于不可培养的微生物也能达到分离的效果，因而在微生物生态学中受到普遍关注与重视。

Microporous molecular sieves, such as zeolites, are one of the most important porous materials, which have wide usage in ion-exchange, catalysis, gas adsorption and separation, and microreactors etc, benefited from their highly ordered pore structures and good physical or chemical performance.

微孔分子筛材料是无机多孔材料家族中的重要一员，由于它们具有规整的孔道结构和独特的性能而被广泛用于离子交换、催化、吸附、分离和化学微反应器等主客体化学领域。

Molecularly imprinted polymers are a new kind of macromolecular materials with molecular recognition capability. Because MIPs have the advantages of predetermination, specificity and practicability, they have been extensively used in chromatographic separation, antibody mimic, solid-phase extraction, biosensors, catalysing reaction and other relevant fields.

分子印迹聚合物是一种具有分子识别能力的新型高分子材料，由于它具有预定性、专一性和实用性等优点，因此在色谱分离、抗体摸拟、固相萃取、生物传感器及模拟酶催化等诸多领域都有广阔的应用前景。

Octacosanol through the molecular distillation technology and high-vacuum separation technology at bee wax and rice bran extract, octacosanol the treatment of excessive calcium osteoporosis, treatment of high cholesterol and high LDL blood type as well as to promote blood and activation of cell cycle, and enhance endurance, energy and stamina, and many other physiological functions; taurine are the first in 1827 at the Ox bile found in a special amino acid, commonly found in natural biology of the human body in vivo an essential nutritional elements, known as "the fulcrum of the body's health balance."

二十八烷醇是通过分子蒸馏技术和高真空分离技术在蜂腊和米糠中提取，二十八烷醇对治疗血钙过多的骨质疏松，治疗高胆固醇和高脂蛋白血型以及促进血液循环和活化细胞，增强耐力、精力和体力等众多的生理功能；牛磺酸是1827年首先在牛的胆汁中发现的一种特殊氨基酸，普遍存在于自然界的生物体内人体内一种必不可少的营养元素，被誉为&人体平衡的健康支点&。

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。