查询词典 spectrum

Methods by using a broad pH range column(Gemini NX C18,4.6mm×150mm,5μm),basic mobile phase which was[H_2O-ammonia-glacial acetic acid] (96:3.6:0.4)-methanol,the related substances in etimicinsulfate were separated and detected by electrospray ionization and positive ion monitoring,the ESI ion source condition was following: temperature is 350℃,nebulizing pressure is 50 psi,dry gas flow is 10 L /min.some related substances in etimicinsulfate were identified by comparing the retention time in chromatography,~+ spectrum and MS~2 spectrum with reference substances\',the others which haven\'t reference substances were identified or speculated by analyzing their MS~2 fragmentation with the help of a rule summarized from the MS~2 fragmentation of gentamicin C1a,micronomicin and etimicin.Results nineteen related substances in etimicinsulfate were separated and detected.

方法利用宽pH范围的Gemini NX C18(4.6mm×150mm，5μm)色谱柱，在碱性条件下，以[水-氨水-冰醋酸(96：3.6：0.4)]-甲醇(70：30)为流动相，直接分离各组分；并用HPLC-ESI-MS~2检测样品中各组分，质谱条件：ESI离子源，离子源温度350□，雾化室压力50 psi，干燥气流速10 L/min，正离子检测方式；对有对照品的有关物质采用比对有关物质与对照品的色谱保留时间、准分子离子的质荷比及二级质谱方法进行鉴定，无对照品的有关物质，则是先通过解析庆大霉素Cla、小诺霉素、依替米星的二级质谱，对该类化合物的二级质谱裂解规律进行归纳，并以此推测未知新化合物进行结构，再用推测的结构对二级质谱进行解析，如所有的碎片离子均合理解释，表明推测合理。

85 And 119486/79. They are a novel type of antibiotic having both the wide antibacterial spectrum and high safety of penicillin and cephem antibiotics belonging to beta -lactam antibiotics, as well as the potent antibacterial activity and high beta -lactamase stability of carbapenem antibiotics.Sodium-(5R, 6S)-6-[-1-hydroxyethyl]-7-oxo-3- [-2-tetrahydrofuryl]-4-thia-1-azabicyclo [3.2.0] hept-2-ene-2-carboxylate 5/2 hydrate (faropenem sodium, hereinafter referred to as compound 1) is currently used as an oral drug for various infectious diseases and is reported to show potent antibacterial activity against not only methicillin-sensitive Staphylococcus aureus, Streptococcus pyrogenes and Streptococcus pneumoniae but also gram-positive bacteria for which conventional beta -lactam drugs have proved ineffective such as penicillin-resistant pneumococci, oral staphylococci and enterococci, also showing a wide antibacterial spectrum covering gram-negative bacteria such as Haemophilus influenzae and anaerobic bacteria such as the genus Bacteroides, which activity is due to its novel skeleton penem ring (Kagaku Ryoho no Ryoiki The Field of Chemotherapy, Vol.

他们是一种新型的抗生素都具有广泛的抗菌谱和高度的安全青霉素和cephem抗生素，属于β-内酰胺类抗生素，以及作为强大的抗菌活性和高β-内酰胺酶稳定的碳青霉烯类antibiotics.sodium -（ 5 R ， 6 S ）-6 -[ - 1 -羟乙基] - 7 -氧- 3 - [ - 2 - t etrahydrofuryl] - 4 -硫杂- 1 -氮杂双环[ 3 。2.0]庚- 2 -节能- 2 -羧酸5 / 2水合物（法罗培南钠，以下简称为化合物1 ）是目前用来作为口服药物，为各种传染病和报道，以显示强大的抗菌活性，不仅对甲氧敏感的金黄色葡萄球菌，链球菌pyrogenes和肺炎链球菌，但也克阳性菌为常规β-内酰胺类药物已证明无效，如青霉素耐药pneumococci ，口腔葡萄球菌和肠球菌，也显示出广泛的抗菌谱，包括革兰阴性菌如流感嗜血杆菌和厌氧菌如属杆菌，这活动是由于其新颖的骨架青霉烯环（（化学ryoho没有ryoiki领域的化疗），第13卷，第10号，第74-80 ， 1997年）。

The motion dynamics and echo models of the precessing warhead in single frequency are set up. Based on a quantitative analysis on echo spectrum and micro-Doppler modulation of precessing cone, a precession parameter estimation method by echo correlation and spectrum width is proposed. The experiments on data by simulation and darkroom measurement verify the method.

建立了单频信号下雷达观测弹头的进动模型和回波模型，通过对进动弹头回波频谱与微多普勒调制特性的定量分析，提出了利用回波相关方法和频谱展宽估计进动参数的方法，并利用暗室测量数据对该方法的性能进行了实验验证。

In the third part of this paper,Aiming at the different characteristic of theextended target spectrum ,this paper discussed the detecting and precised measuring the extended spectrum of the target.

在本章的第三部分，本文针对弹载高重频脉冲多普勒体制雷达展宽回波信号频谱的不同特点，讨论了在不同条件下弹载高重频脉冲多普勒体制雷达对展宽信号频谱的检测及精确测量的问题。

Passive energy dissipated steel structure based-performance seismic design method was reified in terms of post-mend capacity spectrum method and performance-based design flow process based on capacity spectrum method for passive energy dissipated steel structures was established according to different energy dissipation devices.

结合改进后的能力谱法，将被动耗能减震钢结构基于性能的抗震设计方法具体化，并根据不同类型的阻尼器建立了被动耗能减震钢结构基于能力谱法的性能设计流程。

Spectrum Range, Canada, 2005 Photograph by Kevin Burke A hiker slogs uphill through the Spectrum Range at volcanic Mount Edziza Provincial Park in northwest British Columbia.

意译：一位徒步旅行者艰难的穿过光谱山脉在火山Edziza省级公园位于西北的英国哥伦比亚。

It is shown that the harmonic spectrum is extended to in the case of the combined fields, and an isolated 63 as pulse can be obtained by superposing around the cut-off position of the high-order harmonic generation spectrum.

研究结果表明，氦原子在这种组合场驱动下，高次谐波谱的平台区域能得到很大的扩展，其截止位置可延伸到，通过构造截止位置附近的高次谐波谱能够得到脉宽为63 as的单个阿秒脉冲。

In other words, very weak absorption lines of an absorber placed inside the cavity of a multimode laser can modify the laser spectrum and appear superimposed on the broad spectrum of the laser.

近年来，随着多种激光技术和傅利叶变换光谱技术的发展，人们对分子在高振动激发态的振转行为有了更多的认识。

It has been found that the distribution of MIG arc spectrum along wavelength window shows spatial similarity. Amplitude fluctuations related to metal droplet transfer are also found in the dynamic signals of line spectrum.

对焊接电弧光谱进行的研究发现，MIG焊电弧光谱的分布表现出明显的空间相似性，谱线信号波形中含有与熔滴过渡有关的大幅度波动。

These achievements provided proofs for earlier guesses of this phenomena. Furthermore, they also provide theoretical and experimental supports for the application of arc spectrum signal in metal transfer measurement, the development of new welding arc spectrum sensors and the establishment of new welding process controlling methods.

此成果使以往研究中对此现象的猜测得以证实，为将电弧光谱信息应用于熔滴过渡检测提供了理论和实验依据，为开发新型光谱传感器和创建新的焊接过程控制法奠定了基础。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。