查询词典 positive ion

Zwitterion An ion with both a positive and a negative charge.

两性离子：既带有正电荷又带有负电荷的离子。

If there are five or more bonds to a single carbon atoms, it will be short of electrons and have a positive charge - this species is called a carbonium ion, a form of carbocation.

阳碳：如果有五个甚至更多的键连接在一个碳原子上，碳原子由于缺乏电子而带正电，这种物质称为阳碳，这是碳正离子的一种。

For D-fructose functionalized BOPP, three parameters including irradiation time, cerous concentration and hydrogen ion concentration all have positive effect on monosaccharide immobilization.

水接触角数据也揭示了酮糖和醛糖在改性效果方面的差异，酮糖改性的BOPP膜的表面水接触角在47°左右，而醛糖改性的BOPP膜的表面水接触角为60°。

Laser desorption and ionization positive and negative ion mass spsctra of benzopgrene and fluoranthene molecules are investigated by 337 nm N2 laser and time of flight mass spsctrometer.

用激光－飞行时间质谱研究了苯并芘和荧蒽分子在337nm激光照射下的激光解吸和电高质谱。

Fragmentation behavior of xanthones by tandem mass spectrometry and analysis of the constituents in four crude extracts from Halenia Elliptica D. Don Firstly, in order to find the relationship between the structural characterization and the mass spectrometric behavior, eight xanthones isolated from Halenia Elliptica D. Don and nine semi-synthetic xanthones was systematically investigated by positive and negative ion ESI-MS〓 and APCI-MS〓.

〓酮类化合物的质谱裂解规律及椭圆叶花锚活性提取物中相关成分的分析研究首先，采用正负离子两种检测模式下的ESI-MS〓和APCI-MS〓方法对从药用植物椭圆叶花锚中提取分离出来的8个〓酮类单体和9个〓酮类合成物进行了详细、深入的质谱裂解规律研究，考察了化合物结构与质谱行为之间的相关性。

BFGF immunoreaction was detected at 3-weeks' embryonic neuroepithelium, and remained positive throughout various development a l stages examined, whereas NGF immunoreaction appeared after 4-weeks. The expres sion varied gradually with the development of embryos. There was no specific EGF immunoreaction in all tissues and stages examined. The occurrence and distribut ion of FGFR, NGFR and EGFR were similar, and their expression altered with the development.

结果显示bFGF和NGF的表达时序不同，b FGF阳性细胞出现较早，在所检测的各个发育阶段均呈阳性表达，而NGF出现较晚，随着胚龄增加，免疫阳性着色逐渐增强，bFGF分布较NGF广泛，而EGF在所检测的各个发育阶段均呈阴性。flg、TrkA、EGFR表达时序和分布相似，三者在所检测的各个发育阶段均呈阳性。

Results the scoresof obsessive-com pulsive, interpersonal sensitivity, depression, anxiety, hostility, paranoid ide ation, general symptomatic index and number of positive items were significantlyhigher than those of the domestic norm.the multiple linear stepwise regression revealed that the nervousness of epq; fa ther's refusal, rejection; father's warmth and understanding; feeling of oppress ion and cognition of future object entered regression equation.

结果 iad青少年强迫、人际关系敏感、抑郁、焦虑、敌对、偏执因子分、总均分及阳性项目数均高于全国青年常模。进入回归方程的变量有epq的n因子、embu的父亲拒绝否认因子和父亲情感温暖理解因子、压抑感及对未来目标的认识。

Results the scoresof obsessive-com pulsive, interpersonal sensitivity, depression, anxiety, hostility, paranoid ide ation, general symptomatic index and number of positive items were significantlyhigher than those of the domestic norm.the multiple linear stepwise regression revealed that the nervousness of epq; fa ther's refusal, rejection; father's warmth and understanding; feeling of oppress ion and cognition of future object entered regression equation.

进入回归方程的变量有epq的n因子、embu的父亲拒绝否认因子和父亲情感温暖理解因子、压抑感及对未来目标的认识。

A direct method to prepare nanometre catalyst of positive electrode for methyl alcohol fuel battery is to add strong oxidant to a mixed solution of manganese nitrate and some other metal nitrate, to coat them on the graphite electrode to have catalyst precursor produced, then to prepare the non-platinum nanometre catalyst of metal ion-doped manganese dioxide with carbon as a carrier by thermolytic reaction of the in-situ precursor. The prepared catalyst has the advantages of high electrical catalytic activity of methyl alcohol, high performance to protect against CO poison and low price, and it can lower the battery manufacturing cost effectively as well as can raise the entire electrical property of the battery so that the price performance and the market competitive edge of the battery are enchnaced effectively.

一种直接甲醇燃料电池阳极纳米催化剂的制备方法是在硝酸锰和其它金属硝酸盐的混合溶液中加入强氧化剂，涂抹于石墨电极上制成催化剂先驱体，通过先驱体在原位的热分解反应来制备以碳为载体的金属离子掺杂二氧化锰非铂纳米催化剂；制得的催化剂具有高的甲醇电催化活性、高的抗CO毒化性能以及低廉的价格等优点，可以有效地降低电池的制造成本，提高电池的整体电性能，从而有效地提高直接甲醇燃料电池的性能价格比及市场竞争能力。

Meanwhile, amorphization induced by ion mixing, beginning also with multilayered films, has been extensively studied since early 1980s and some scientists have argued that a positive heat of formation is unfavored for amorphous alloy formation.

同时，80年代初以来，人们也对多层膜离子束混合诱发非晶化开展了广泛的研究。一些学者认为正的生成热不利于非晶态合金的形成。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。