氧
- 与 氧 相关的网络例句 [注:此内容来源于网络,仅供参考]
-
Water,caprylic/capric triglyceride,mineral oil,butylene glycol,stearic acid,acetylated lanolin,glycerin,ethylhexyl methoxycinnamate,dimethicone,polyisoprene,triethanolamine,cyclopentasiloxane,butyl methoxydibenzoylmethane,titanium dioxide,persea gratissima oil unsaponifiables,sodium DNA,borago officinalis seed oil,oenothera biennis oil,simmondsia chinensisseed oil,hydrolyzed RNA,tocopheryl acetate,urea,hydrolyzed extensin,retinyl palmitate,sodium hyaluronate,helianthus annuusseed oil,tocopherol,ascorbyl palmitate,ascorbic acid,lanolin alcohol,c12-20 acid peg-8 ester,cyclotetrasiloxane,glyceryl stearate,dimethiconol,ceteareth-20,carbomer,magnesium aluminum silicate,propylene glycol,peg-8,silica,BHT,citric acid,phenoxyethanol,methylparaben,butylparaben,ethylparaben,isobutylparaben,propylparaben,chlorhexidine digluconate
水,辛酸/癸酸三酸甘油酯,矿物油,丁二醇,硬脂酸,乙醯化羊毛脂,甘油,4-甲氧基肉桂酸-2-乙基己基酯,地美司康,聚异戊烯,三乙醇胺,环戊硅氧烷,丁基甲氧基二苯甲醯基甲烷,二氧化钛,酪梨油,DNA 钠盐,琉璃苣種子植物油,月见草油,荷荷巴籽油,水解RNA,醋酸盐维他命E,尿素,水解伸展蛋白,维他命A酯,透明质酸钠,葵花籽油,维生素E,抗坏血酸棕榈酸酯,维生素C衍生物,羊毛脂醇,C12-20 酸 PEG-8酯,环四硅氧烷,甘油硬脂酸,聚二甲基硅氧烷醇,鲸蜡硬脂醇醚-20,卡波姆,硅酸镁铝,丙二醇,聚乙二醇-8,二氧化硅,二丁基羟基甲苯,柠檬酸,苯氧乙醇,羟苯甲酯,羟苯丁酯,羟苯乙酯,羟苯甲酸异丁酯,羟苯丙酯,洗必泰葡萄糖酸盐
-
Ethoxycarbonyl-4,5-dimethyl-pyrrole (7) was prepared from ethylacetoacetate, ethyl formate and methyl ethyl ketone via oximination, Claisen condensation, and reductive condensation. The bromization of compound 7 gave 2-ethoxycarbonyl-3-bromo-4,5-dimethyl-pyrrole(8), which could be transferred to 2-ethoxy-carbonyl-3-brome-4-methyl-5-formyl-pyrrole (9) by the formolation.
由乙酰乙酸乙酯、甲酸乙酯及丁酮等原料经过肟化、Claisen缩合、还原缩合成环得到2-乙氧羰基-4,5-二甲基-吡咯(7),溴化生成2-乙氧羰基-3-溴4,5-二甲基-吡咯(8),最后经过甲酰化反应得到目标产物2-乙氧羰基-3-溴-4-甲基-5-甲酰基-吡咯(9)。
-
This paper introduces a kind of pulse oxygen saturation calibrator,which can calibrate the output of oximeter exactly.
本文介绍了一种脉搏式血氧饱和度仪校准仪的研制,这种校准仪可以检测血氧仪的工作状态是否正常,并能对血氧仪的输出参数进行校准。
-
Therefore, the ways to their separation and identification are different, except similar separation method for caproic acid bacteria and butyric acid bacteria and similar property identification method for acetic acid bacteria and lactobacillus, the other methods are quite different.
摘 要:着重研究粮食酒发酵中4类产酸菌的分离,其中己酸菌与丁酸菌同属梭状芽孢杆菌,为厌氧菌,醋酸菌为好氧菌,乳酸菌则微好氧,因此各自有不同的分离鉴定方法,其中己酸菌与丁酸菌分离方法相似,丁酸菌与乳酸菌的性能鉴定方法相似,其他则各有特色。
-
The share of market of the bacteriophage such as carbostyril type medicine is approximate 30%. Its main medicine is norfloxacin, Ciprofloxacin, ofloxacin and Levofloxacin Hydrochlo-Ride , etc. The demand of ofloxacin is the greatest.
其中喹诺酮类抗菌药物市场占有率约30%,其主要品种为诺氟沙星、盐酸环丙沙星、氧氟沙星及盐酸左氧氟沙星等,其中以氧氟沙星的用量最大。
-
The ventilatory responses of the peripheral chemoreflex following microinjection within the NA of either P2X receptor agonist adenosine triphosphate or antagonist pyridoxal-5′-phosphate-6-azo-phenyl-2, 4-disulfonate were observed.
结果 吸入低氧混合气后,动物呼吸加深加快;在NA处微量注射ATP增强了急性低氧呼吸频率,微量注射PPADS部分阻断了ATP对低氧通气的兴奋效应。
-
In this paper,firstly a series of acryloxyl derivatives were synthesized from the dehydrogenated abietic acid,a main composition of disproportionated rosin, through acyl chloridation and esterification.The derivatives included the (β-acryloxyl ethyl) esters of dehydrogenated abietie acid,(β-methacryloxyl ethyl) esters of dehydrogenated abietic acid and (β-methacryloxyl propyl)esters of dehydrogenated abietic acid.
论文首先以歧化松香中的主要成分脱氢枞酸为模型化合物,采用酰氯化、酯化手段合成了它的一系列丙烯酰氧基衍生物,包括脱氢枞酸酯、脱氢枞酸(β-甲基丙烯酰氧基乙基)酯和脱氢枞酸(β-甲基丙烯酰氧基丙基)酯。
-
H-Tyr-OH was then react with fluorenylmethyl chloroformate in dioxane or THF to give N-Fluorenylmethoxycarbonyl-O-benzyltyosine Fmoc-Tyr(Bzl-OH in 98% yield.
酪氨酸苄醚与芴甲氧羰基氯(Fmoc-C1)反应,成功地在氨基上导入了芴甲氧羰基保护基,反应在二氧六环或四氢呋喃中进行,产率达到98%。
-
The free radical scavenging properties of six Aloe species are to be investigated in some modified chemical system. The antioxidant was purified by silica column and thin layer chromatography and analyzed by HPLC. A fraction was purified from A. brevifolia Mill showed the most effective scavenging activities on 〓 and ·OH (66. 01% and 38. 98% respectively). With the analysis of IR spectrum, UV spectrum and mass spectrum, the structure of FA was identifed as 8-C-D-glucopyranosyl-2- [2-hydroxy] propyl-5-methyl-7-hydroxychromone. Its scavenging activity on free radicals is higher than that of aloe-emodin. Its antioxidant activity may be due to the phenoxyl on glucosyl chromone which can be react with free radicals and form relatively stable free radicals.
本研究利用分别产生超氧阴离子自由基和羟自由基的化学模型体系研究比较了不同品种芦荟提取物的清除活性氧自由基的抗氧化作用,进一步利用硅胶柱结合薄层层析法和反相高压液相色谱法,从短叶芦荟叶子中首次分离了具有较强自由基清除能力(超氧阴离子自由基和羟自由基清除率分别为66.01%和38.98%)的成分FA,利用红外光谱、紫外光谱和质谱等仪器分析结果推断出该活性成分的分子结构为8-C-吡喃葡萄糖-2-[2-羟基]-丙基-5-甲基-7-羟基对氧萘酮,它的自由基清除能力高于芦荟大黄素,是一种天然抗氧化剂。
-
Their structures were identified by physicochemical constant and spectral analysis (IR, UV, EI-MS, 1H-NMR, 13C-NMR, and HMBC). Results The compounds were identified from their ethanol extracts as: 6, 8-dihydroxy-2-[2-(3'-methoxy-4'-hydroxyl phenylethyl)] chromone and 6-methoxy-2-[2-(3'-methoxy-4'-hydroxyl phenylethyl)] chromone.
结果 从沉香乙醇提取物中分得2个色酮类成分,分别鉴定为6,8-二羟基-2-[2-(3'-甲氧基-4'-羟基苯乙基)]色原酮{6,8-dihydroxy-2-[2-(3'-methoxy-4'-hydroxyl phenylethyl)]chromone,Ⅰ}和6-甲氧基-2-[2-(3'-甲氧基-4'-羟基苯乙基)]色原酮{6-methoxy-2-[2-(3'-methoxy-4'-hydroxyl phenylethyl)]-chromone,Ⅱ}。
- 推荐网络例句
-
This one mode pays close attention to network credence foundation of the businessman very much.
这一模式非常关注商人的网络信用基础。
-
Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.
扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。
-
There is no differences of cell proliferation vitality between labeled and unlabeled NSCs.
双标记神经干细胞的增殖、分化活力与未标记神经干细胞相比无改变。