【摘 要】
：
The detector,as well as being an essential supporting device for the gas chromatography(GC) has also played a critical role in the development of the technique
【机 构】
：
International Scientific Communications,Inc.,Shelton,
论文部分内容阅读
The detector,as well as being an essential supporting device for the gas chromatography(GC) has also played a critical role in the development of the technique as a whole.The mass spectrometer(MS) is still the commonly praised detector as before.In fact,the information of fragmentation patterns is seldom used in practice,and the GC-MS instrument is even more expensive.For today’s analytical problems,it seems that element specific detectors can and should be used for many applications rather than GC-MS.
The detector, as well as being an essential supporting device for the gas chromatography (GC) has also played a critical role in the development of the technique as a whole. The mass spectrometer (MS) is still the commonly praised detector as before fact, the information of fragmentation patterns is seldom used in practice, and the GC-MS instrument is even more expensive. For today’s analytical problems, it seems that element specific detectors can and should be used for many applications rather than GC-MS.
其他文献
Aims: To estimate the propensity of keratomycosis for parallel or secondary bacterial infection and to explore affinities among fungal and bacterial co-isolates
汉字笔画最少的是“一”和“乙”两个字,只有一笔；最多的是“齉”字共36笔。(“齉”音nàng,表示鼻子不通气,发音不清)。
The least amount of strokes of Chinese character
本文采用自己组装的激光诱导荧光光谱测定装置,研究了Tb-TFA-TOPO-SLS体系的发光特性和能量传递机制。首次测得TFA的室温磷光发射,拟定出测定痕量铽的激光诱导荧光分析方法。
【教学内容】人教版五年级上册第106页。【教学过程】一、直观引入,唤起旧知师:同学们参加了植树活动,并知道了植树的好处。老师还想说,植树中还藏着许多数学问题呢!今天我们
【摘要】伴随着我国社会经济的不断发展，也相应的促进了我国英语教学的发展，在实际的英语教学中，教师通过运用现代化的教学策略，不断的提高教学的水平和学生的学习水平。在本文的研究中，针对于分组分层教学法在高中英语教学中的应用进行了具体的分析和研究。 【关键词】分组分层教学法 高中英语教学 应用 一、分组分层教学的含义 分组分层教学法就是将小组教学与班级教学有效的结合起来，将整个班级的学生按照学习水
甭管弄出了多少新花样，从类型上来说《独行侠》还是一部西部片。西部片的样式和意义可以任人解读，但归根结底还是要放在殖民主义的大背景下延展故事，什么都可以变，殖民拓张、牛仔警匪乱斗、白人与原住民之间的矛盾这些基本要素不可或缺。不过时过境迁，殖民主义变成了后殖民主义（全球化），西部片大潮也早已偃旗息鼓，如果说《不可饶恕》《与狼共舞》中还残存着西部片最后一脉贲张的热血，那到了《兰戈》《独行侠》这样的电影里
茶子象(虫甲)是我省油茶主要害虫之一,若能利用生物防治,在生产中将具有重要意义。1974年我站从第四代普洱松毛虫上采取
Tea seeds (insect) is one of the major pests in
作为特级教师翟裕康校长的弟子,每次听课总被他那干脆利落、幽默诙谐的教学风格所吸引。他那循循善诱、朴实本真的课堂,让人回味无穷,宛如余音绕梁。下面就翟校长70岁生诞时
目的 探讨儿童阻塞性睡眠呼吸暂停低通气综合征(OSAHS)的临床特征、病因诊断及治疗方法.方法分析经多导睡眠监测(PSG)确诊为OSAHS患儿共38例的临床症状、体征及病因特点,对其中腺样体、扁桃体肥大患儿36例进行手术治疗,2例使用持续正压通气(CPAP)治疗,评价其疗效.结果(1)OS-AHS患儿的主要症状是入睡打鼾(100%)、张口呼吸(92.1%)、憋气(78.9%).(2)病因主要是扁桃