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HNIW was obtained by the nitrolysis of TADNSIW and TAIW using N_2O_5/HNO_3 as nitrating agent. Several effects on the yield, purity and crystalline form of product were analyzed. In the best conditions, the yield of HNIW was 87.2% and 89.2%, the purity was 96% and 99%, they were all mixtures ofα-HNIW andγ-HNIW.

分析了各种因素对产物收率、纯度及晶型的影响,在最优条件下,HNIW的收率分别为87.2%和89.2%,纯度分别为96%和99%,产物均为α-HNIW和γ-HNIW的混合物。

Baculoviruses have emerged as a popular system for overproducing recombinant proteins in eukaryotic cells. Several reasons lead to this popularity. First, the rod shaped capsid can extend to accommodate large DNA inserts.

昆虫杆状病毒载体表达系统由于对人畜安全无害,外源基因容量大,表达水平高,表达产物的抗原性、免疫原性与功能均类似天然产物,因而在诸多表达系统中日益引人注目。

Ischer-Tropsch synthesis is a process for theproduction of various hydrocarbons and oxygenates fromhydrogenation of CO over transition metal catalysts.

T合成产物按碳数的分布规律可由Anderson-Shulz-Flory公式很好地描述,虽然对某些轻组分产物有较明显的偏离。

Albicans strains with fluconazole. Method: A series of 16 strains C. albicans from the same body were induced to form pseudo-hyphae in RPMI 1640 medium and DMEM medium at 37 癈 for twenty-four hours respectively. The pseudo-hyphae and yeast were counted and the ratio between pseudo-hypha and total cells was calculated. C. albicans strains were induced to form pseudo-hyphae in RPMI 1640 medium for seven days by transferring twelve times. The genome DNAs of the hyphal-form of C. albicans was cleaved by two restriction enzymes EcoR I and Bgl II, the products were electrophored and photoed.

以同一母体来源的白念珠菌CA-1~A-17(共16株)作为研究对象,采用RPMI1640和DMEM培养基,37℃培养24h诱导其假菌丝形成,记录不同观察时间时的菌丝相和酵母相细胞数,计算菌丝相白念珠菌形成率;以RPMI1640培养基,37℃连续传代培养7天(转种12次)后,分离菌丝相白念珠菌并提取其基因组DNA;以EcoRⅠ和BglⅡ消化菌丝相基因组DNA,消化产物进行琼脂糖凝胶电泳并拍照;用随机引物(5'…TCACCACGGT…3')扩增菌丝相基因组DNA,采用变性聚丙烯酰胺凝胶电泳分离扩增产物并拍照。

It was found that not only are χ Al 2O 3 and η Al 2O 3 capable of rehydration,but also all the above mentioned transitional aluminas can be rehydrated when in contact with H 2O under its saturation pressure at temp...

结果表明,上述诸脱水产物均可发生再水合现象,最终的转化产物均是薄水铝石,而非它们的原起始物。

A novel method combining a conventional free-radical solution polymerization with a chemical saponification was used to synthesize a, cu-dicarboxyl terminated oligo s with molecular weight below 1500. Here, cn-carboxyl terminated oligo s were firstly synthesized by the free-radical polymerization in THF, where 4,4'-azobis(4-cyanovaleric acid) was used as initiator, thioglycolic acid as chain transfer agent, then CTBMA were transformed into di-CTBMA via saponifying CTBMA in dioxane/H_2O/KOH solution.

利用传统自由基聚合法,在四氢呋喃溶液中自由基引发聚合甲基丙烯酸丁酯单体而得到w-羧基-甲基丙烯酸丁酯低聚物(分子量在1500左右);利用CTBMA 末端酯基的反应特性,在二氧六环/水/KOH混合溶液中皂化CTBMA,使之转化为a ,w-羧基甲基丙烯酸丁酯低聚物;研究了溶剂的类别、反应时间等反应条件对皂化产物结构的影响;利用MALDI-TOF-MS及LSIMS对皂化各阶段产物进行了分析监测。

Ores from the old mine are already smelted but those from the new mine are not.

老矿的产物都已经过溶解,但新矿的产物则不然。

The corrosion products of aluminum exposed in the SO2-containing atmosphere are mainly of sulfates, and is therefore it is more serious corrosion in this environment.

对腐蚀产物结构的测定,在含SO2的气氛中铝的腐蚀产物主要是由硫酸盐组成,因而其腐蚀较为严重。

Human fibroblast interferon mRNA was prepared from poly I:C-cycloheximide superinduced human diploid cells by phenol-octanol exhaustion method followed by oligo-cellulose chromatography.

其主要实验根据是:超诱导细胞mRNA含量明显高于正常细胞;干扰素mRNA在非洲鲫鱼卵母细胞内转译的产物具有明显的抗病毒活性;转译时~14C-苯丙氨酸的掺入明显高于正常细胞;种属特异性实验及酶的敏感性实验证明转译产物中存在的抗病毒物质是一种人的干扰素蛋白质。

This method provided a rapid and accurate approach to the detection of pathogenic vibrios. In chapter three, broad-range PCR coupled with MCPC technology was adopted as a solution for broad-spectrum detection and identification of foodborne pathogens.

通过广谱PCR扩增食源性致病菌的16S rRNA和23S rRNA基因的保守区域,利用双链置换探针-MCPC技术针对扩增产物的差异序列区分不同产物,实现了在单管中对9类常见食源性致病菌的识别。

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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。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力