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Sulfuric acid was sulphonation reagent, add the sulfuric acidquantity was 8%, reaction temperature was 60~65℃.The reaction occursbetween the feed oil and sulfuric acid,then add 30% of sodium hydroxidesolution conducted neutralization in the Pyrex standard react kettle,when the reactionfinished ,draw out the products by funnel,then the products react with 8%clay to refine received the sulphonation refining oil so as to review property andreceive rate of the shallow sulphonation refining oil .By the using the sulphonationrefining oil to blend lubricant,its quality is on-specification .
为验证其可行性,首先在实验室进行浅度磺化小试,原料油采用新疆原油经常压蒸馏、减压蒸馏、溶剂精制、溶剂脱蜡后的减压二、三线脱蜡油,发烟硫酸作为磺化剂,发烟硫酸加入量8%,反应温度60~65℃,用三口圆底耐热玻璃标准反应釜对原料进行发烟硫酸磺化,加入量30%氢氧化钠中和,分液漏斗抽提,在烧杯内加入量8%白土进行精制得到磺化抽余油,考察浅度磺化抽余油性质和收率,用磺化抽余油调合润滑油质量合格。
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The basic data obtained from the experimental research were calculated and disposed with computer and concluded an important principle of Li〓O by silicon thermoreduction. The factors affected the reduction such as temperature, pressure and time were dicribed by methematical equations. The relation ships of reduction rate with temperature, pressure and time were directly expressed by three-dimension figures. The relating mathematical equations described the process derived from research were proved to be coincided with the practice. Therefore, the obtained results were accurate and reliable and of important value.
运用计算机对试验研究得到的基本数据进行计算和处理,得到了氧化锂硅热还原的重要规律;用数学方程描述了温度、压力和时间还原的影响;用三维立体图直观地表现了温度、压力和时间〓与还原率的关系;研究得到的描述过程的有关数学方程,经验证与实际相符,因此得到的结果准确可靠。
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Methods n-Cetyl-l-thio-β-D-galactoside was synthesized by a series of reaction from galactose and incorporated into Small Unilamellar Vesicles which was prepared by sonication at the ratio for L-α-PC∶Chol∶L-α-PE as 7∶2∶1, with or without 10 mol%Cetyl-gal.
半乳糖经乙酰化、溴化、缩合、亲核取代反应制备半乳糖新糖脂质并与其他脂质制备脂质体,在二氯化锡还原作用下用99mTc标记脂质体,进行动物体内靶肝实验,用γ计数器检测各脏器放射性,计算摄取率。
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Second Municipal People's Hospital of Guangzhou, Guangzhou 510150 Objective To study the technique and diagnostic value of fluorescence insitu hybridization in chromosome abnormality for prenatal diagnosis. Methods Amniocenteses were performed in 34 pregnant women of 16~23 gestational weeks with indications for prenatal diagnosis. The amniotic fluid samples were cultured in Chang's medium.
对34例孕16~23周有产前诊断指征者经腹部抽取羊水,用Chang培养液传代培养,常规制备羊水细胞分裂中期染色体,应用生物素及地高辛标记的人类全着丝粒探针和X、Y、13、21、18号染色体α-着丝粒探针及染色体全涂染探针,与培养的羊水细胞分裂中期染色体DNA进行原位杂交,杂交后用荧光显微镜观察玻片并摄像。
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Methods Amniocenteses were performed in 34 pregnant women of 16~23 gestational weeks with indications for prenatal diagnosis. The amniotic fluid samples were cultured in Chang's medium. The metaphase chromosomes were hybridized insitu with the human centromere probes,α-satellites DNA probes of X, Y,13, 21, 18 chromosomes and all primer chromosome probes. These probes were conjugated by Biotin and Dioxin then. The treated slides were examined and taken photos under the fluoromicroscope.
对34例孕16~23周有产前诊断指征者经腹部抽取羊水,用Chang培养液传代培养,常规制备羊水细胞分裂中期染色体,应用生物素及地高辛标记的人类全着丝粒探针和X、Y、13、21、18号染色体α-着丝粒探针及染色体全涂染探针,与培养的羊水细胞分裂中期染色体DNA进行原位杂交,杂交后用荧光显微镜观察玻片并摄像。
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Result: The anticancer active component includes: taxol 9.45%、cephalomanine: 9.63%、10- deacetylbaccatinⅢ: 22.64%、total flavonoids: 19.15%. 3. The preparation of Seiadopitysin control Methods: Take dry Ginkgo leaves and extracted three times by sonication with 95% EtOH, solutions were concentrated under vacuum, after defatting by petroleum benzin, the sample was extracted with EtOAc and the solutions were concentrated under vacuum.
金松双黄酮对照品的制备方法:取干燥银杏叶以95%乙醇超声提取3次,提取液合并,减压浓缩,石油醚脱脂后,用乙酸乙酯萃取,萃取液减压浓缩,经硅胶柱(6cm×80cm)层析,石油醚-乙酸乙酯(9∶1~5∶5)梯度洗脱,产物用甲醇多次冲淋,再以二甲基甲酰氨溶解,反复重结晶,得黄色粉末结晶。
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Fabric made on galloon-knitting-machines, not impregnated coated, covered or laminated, not elasticized of any textile material whether or not dyed printed or made of different coloured yarns
经编针织物(包括缎带编织机织成的织物),未浸渍、涂层、包覆或压层,无弹力,用任何纺织材料织成,不论是否染色、印花或用什色纱线织成
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The sample was redissolved in the acetonitrilved in the acetonitrile-water (3:2, v/v), then analyzed using LC-MS/MS in multiple reaction monitoring mode via positive electrospray ionization with an Agilent ZORBAX SB-C18 column as the analytical column.
样品用1%醋酸乙腈溶液萃取,经Waters Sep-Pak Vac固相萃取柱净化,乙腈-甲苯(体积比为3:1)洗脱,旋转蒸发浓缩,用乙腈-水(体积比为3:2)溶解,以Agilent ZORBAX SB-C18色谱柱分离,以电喷雾电离串联质谱在正离子多反应监测模式下进行测定。
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Brief description is given to the test on the technology for comprehensively recovering gold and silver from tellurium-bearing slag: Tellurium-bearing slag is ground and leached with water to produce crud tellurium dioxide which is then purified through ion precipitation and complexing purification process; leaching reside is leached with chloride to produce copper and bismuth, bismuth oxychloride is recovered through neutralization and hydrolysis and sponge copper is recovered through cementation; gold and silver in the remaining residue can be recycled to the gold and silver smelting system for recovery.
文摘:简述了碲渣综合回收金银等的工艺试验:碲渣经磨矿水浸碲产出粗二氧化碲,用离子沉淀和络合净化法提纯;浸碲渣用氯盐浸出铜铋,中和水解回收氯氧铋,置换回收海绵铜;残留渣中的金银可返回金银冶炼系统回收。
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NYSDOT approved for both proximity and limit switches Super bright, large LED display, easy reading under direct sun light Continous display of mixing and total revolutions Low power consumption, less than 1 amp Recessed reset connector prevents damage Tamper proof reset interlock Compact, light, rugged construction, water resistant Works with various types of proximity switch, existing installation harness and ac reset cable Easy to install; includes installation harness, moving plate and pickup bracket for proximity sensor
经NYSDOT认可的接近开关和限制开关超亮,大型LED显示器,直接在阳光下可以阅读可连续的混合显示器和总的旋转低能耗不到1amp 重新设置连接器防止毁坏防干扰设置互锁紧密,轻便,牢固的结构,防水工作中使用各种类型的接近开关,已有的安装用的安全带和交流设置光缆易安装,包括安装用的安全带,移动板和拾取托架
- 推荐网络例句
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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。
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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。
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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