450
450的相关文献在2001年到2018年内共计151篇,主要集中在化学工业、自动化技术、计算机技术、轻工业、手工业
等领域,其中期刊论文151篇、专利文献120530篇;相关期刊124种,包括致富天地、中国禽业导刊、材料导报等;
450的相关文献由124位作者贡献,包括王璐、张斌、Joanna等。
450—发文量
专利文献>
论文:120530篇
占比:99.87%
总计:120681篇
450
-研究学者
- 王璐
- 张斌
- Joanna
- 曲剑华
- 王志军
- 王永昌
- AlixL.Paultre
- James
- Le Phuoc Cuong
- Le Thi Xuan Thuy
- Loadmemory
- Micheal Evgenev
- RIKIMARU
- SwaT+
- 丁诺
- 于海霞
- 何海军
- 余媛
- 俞岫
- 傅子宴
- 冯绍杰
- 凌国平
- 刁海燕
- 刁训刚
- 刘东旭
- 刘亦谋
- 刘作义
- 刘希锋
- 刘德明
- 刘文政
- 刘泉波
- 刘涛
- 刘荣厚
- 古木
- 叶学斌
- 吴晓东
- 吴金福
- 周玉麟
- 姚伟康
- 姚占军
- 孔海发
- 孙裔
- 孟亮
- 宋明
- 小虫
- 庞晓华
- 弓人
- 张俊英
- 张堃
- 张弓(摘编)
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摘要:
全球顶级焊接设备及解决方案供应商——肯倍公司展出的FastMig X 450焊机功能强大、性能卓越,是名符其实的管道焊接专家。FastMig X 450可使用多种焊接方式:MIG、1-MIG、脉冲MIG、MMA和TIG,而且一台焊机即可实现打底、填充、盖面等多种功能,极大地提升了焊接效率,降低了用户成本。FastMig X 450可装配WiseRoot+工艺软件,实现无衬垫、开坡口、有间隙的根部焊接。在实芯焊丝打底焊中,无论使用CO或者混合气,2FastMig X 450都能表现极佳的焊接性能。此外,FastMig X 450一台电源配置双送丝机,方便焊接时选用不同种类焊丝。独特的MatchChannel功能,通过按压焊枪开关,可以便捷地调节焊接电流以适应不同的焊接位置。
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Le Phuoc Cuong;
Le Thi Xuan Thuy;
Micheal Evgenev
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摘要:
A combination of spectral and chromatographic analytical methods has been executed to monitor chemicals in the hair of Vietnamese people. Methods were developed for the determination of some chemical elements in hair by inductively coupled-plasma atomic emission spectroscopy with limits of detection reaching 1 - 100 μg·l-1. A supercritical fluid extraction (SFE) and clean-up procedures were established for isolating organochlorine pollutants (OCPs) and organophosphorus pesticides (OPPs) from the hair of the Vietnamese test subjects. Eight OCPs and OPPs were determined by SFE with carbon dioxide only and methanol-modified carbon dioxide extraction at 350 bar and 45°C, followed by gas chromatography coupled to mass spectrometry. The results indicated that OCPs can be extracted quantitatively using CO2 only, whereas OPPs require a modifier for extraction. The limits of detection that were found were between 0.7 to 1.3 μg·g-1, and good linearity (r2 > 0.9861) was achieved within the tested ranges. The activities of the N-acetyltransferase (NAT) and the monooxygenases cytochrome P450 (CYP 450) were determined and compared to the acetylation and oxidation phenotypes of healthy Vietnamese test subjects. The variations in the concentration of chemical elements in human hair were shown to be dependent upon the activities of the two-phase metabolic system, on the individual’s gender and the duration of residence within Russia.
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葛胜;
童小云;
余媛
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摘要:
随着早熟晚粳面积的扩大及后期用肥的增加,特别是直播稻、机插秧等稻作方式的迅速发展,扬州市水稻成熟期推迟、收获腾茬越来越晚,小麦迟播面积不断增大,给小麦生产带来一定影响.近几年来,通过对晚茬小麦进行跟踪田间调查和研究.初步形成450kg/667m2的高产栽培技术.
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