分离筛

After the studies on the fruit of Viburnum sargentii Koehne, it is showed that it has the effect to the cough and it has no toxicity; The active part is the acidity part. Through the GC-MS, we obtain 23 compounds from the volatile oil. By HPLC analytical method, the content of chlorogenic acid is 0.82%.

本文通过对小鼠氨水引咳实验和急性毒性实验，证明了本品的止咳作用，并且没有毒性；在有效部位的筛选中，确定其有效部位为NaOH洗脱部分；在挥发油的成分测定中，共分离出32个峰，鉴定出23个化合物，占挥发油总量的95％以上；在绿原酸的含量测定中，测出其绿原酸含量为0.82％。

The categories and formation mechanisms of defects in zeolite membranes are further described in detail.

缺陷的存在降低了分子筛膜的筛分作用和分离选择性，从而限制了其工业应用。

Through re-screening, one strain named as FZ5 was found to have better degradation ability of lubrication oil and identified preliminarily as Alcaligenes sp..

从福州祥坂污水处理厂的活性污泥中分离到12株机油降解菌，经复筛得到1株具有较强降解能力的菌株（命名为FZ5），初步鉴定为产碱菌属Alcaligenes sp。

The results showed that: 1. 12 strains of alginic acid decomposing bacteria were isolated. Five strains of them which could degrade alginate actively were screened out.

研究结果表明：1、利用选择性培养基共分离到12株褐藻酸降解菌，通过降解能力的测定，筛选出5株强降解能力的菌株。

The major results obtained are: PCR-RFLP method is suitable for molecular identification of Shihu; 205 compounds were isolated from 10 species of Dendrobium, including 21 new compounds, and 28 compounds isolated from genus Dendrobium for the first time. Each of the extracts and compounds were screened for anticoagulant and antitumour activities separately. The results indicated that the ethyl acetate extract from Dendrobium chrysanthun has significant anticoagulant function; the antitumour function of the 4 bibenzyl components from Dendrobium chrysotoxum is stronger than that of phenanthrene, of which the erianin has significant anti-angiogenic effect both in vivo and in vitro; components with moderate or stronger antitumour activities were found in the extracts of D. thyrsiflorum, D. chrysanthun and D. trigonopus; quality standard for 5 species of Dendrobium was drawn up use active or indicative components as control.

重要研究结果有：经方法学研究，认为PCR-RFLP法适于作为石斛属药材分子标记鉴定方法；对10种石斛进行化学成分分离鉴定，共分得205个化合物，其中新化合物21个，首次从石斛属分得的28个；对提取物和各单体化合物分别作抗凝血、抗肿瘤等活性筛选，结果说明束花石斛乙酸乙酯部位有显著的抗凝血作用，鼓槌石斛的4个联苄类成分抗肿瘤作用强于菲类，联苄类毛兰素在体内外有显著抗血管生成活性，球花石斛、束花石斛及翅梗石斛均筛到中等或较强抗癌活性的成分；选择有活性或指标性成分作对照品，对5种石斛草拟了质量标准。

Samples in group A were incubated in 1 g/L collagenase Ⅳ, whereas samples in groups B, C and D were incubated in 1 g/L collagenase Ⅱ at 37 ℃ for 45 minutes. Following cribration, cell suspension was collected from each group.

过筛后收集各组细胞悬液，按组别对应施以羟乙基淀粉沉淀法、淋巴细胞分层液分离法、氯化铵裂解红细胞法进行分离。

The sequence variation analyses showed that there are 236 variable and 221 parsimony-informative in the aligned 605 nucleotide sites, in addition, the relative frequenencies of four nucleotides were not equal an this fact showed that the base compositions were biased. The results of phylogenetic analyses showed:(1) the phylogenetic relationships of the Cypraeidae taxa was basically in consistent with morphology-based ones;(2)Cypraeovulinae was monophyletic in all trees, whereas Nariinae and Cypraeinae were not;(3)the monophylies of Mauritia, Palmadusta, Erosaria, Monetaria, Staphylaea and Pustularia were strongly supported by molecular data;(4)Meyer's speculation that Chelycypraea came out from Luria were also supported.

结果表明：(1)宝贝科28种动物的分子系统树大部分与形态学分类一致；(2)在系统树上，疹贝与鼻贝亚科的其它分类群的距离相隔较远，提示它们之间有较远的亲缘关系，建议将疹贝属列入宝贝亚科；(3)卵宝贝亚科包括希达贝、脊焦贝、筛目贝、拟枣贝、焦掌贝以及呆足贝等共计15个属，它们在系统树上构成独立的一个大支系，构成单系群；(4)支持Meyer将龟甲贝从禄亚贝总属中分离出来的观点，但龟甲贝和林西那贝之间的系统发生关系及其分类地位还有待于进一步探讨。

It is nothing else than impurities prenatally inherent in ore that seriously affect the quality of the latter, which is formed as a result of geological vicissitudes including diastrophic movement, eruption of volcano, sedimentation, glaciation and weathering etc., under the action of which pyrogenic rocks, volcanic complex, aqueous rocks, sedimentary rocks etc., come into being, some of which exist in a stage of symbiosis, the main cause of the absence of pure rocks in nature, wherein lies the reason for the need of separation technology and apparatus, namely, ore-dressing devices and equipment, so far impotent to meet the requirements of metallurgical industry the scientists make every endeavor to elevate to a new high by laser separation.

影响矿石质量的关键是其所含杂质的多少，其成色高低受一系列地质变迁，如地壳运动，火山爆发，沉积运动，冰川运动及风化侵蚀等作用影响，经过高温成岩，火山熔岩，含水岩，水成岩等过程形成，部分以共生态存在。自然界纯矿石稀少，因此我们需要使用分离技术和设备，即筛矿装置和器械，但目前的设备已不能满足冶矿业的需求，科学家们正试图以激光筛选使选矿技术达到一个新的水平。

A bacteriocin-like substance producing strain T12 was screened from 212 lactic acid bacteria isolated from intestine of healthy pigs by paper disk test and was identified as Lactobacillus. The supernatant of T12 exhibited strong inhibitory activity against the gram-positive bacteria, including Micrococcus lysodeikticus, Staphylococcus aureus, Bacillus subtilis and Bacillus cereus. A strong activity was also observed against the gram–negative bacteria and some eumycete, such as Escherichia coli, Salmonella typhimurium and Fusarium graminearum.

通过滤纸片法从健康肉猪猪大肠、小肠中分离得到212株抗生物质产生菌，以杯碟法复筛，得到1株对溶壁微球菌、金黄色葡萄球菌、枯草芽孢杆菌、蜡状芽孢杆菌等革兰氏阳性菌和大肠杆菌、鼠伤寒沙门氏菌等革兰氏阴性菌以及部分真菌如禾谷镰刀霉均有强烈抑制作用的乳酸菌。

During screening of seaweeds from different places in Europe for antimicrobial actiities against human and fish pathogenic bacteria, Laurencia chondrioides was identified as a promising species. By bioassay-guided isolation, followed by structure elucidation by mass spectrometry and 1H- and 13C-NMR spectrometry, two sesquiterpenoides of the chamigrene-type from the selected red seaweed Laurencia chondrioides were identified.

在对欧洲不同地方的海藻进行抗人类和鱼类病原菌的活性筛选中，凹顶藻Laurencia chondrioides被认为是最具前景的种类，通过生化分离和质谱和H、C核磁共振谱的分析，从所选的红藻Laurencia chondrioides中鉴定出了2种C型倍半萜。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。