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四种杀菌剂在白及初加工过程中的残留变化

浙江农业学报 2024年第7期36卷 1677-1685页

作者：石贵远黄文源段婷婷李明郭怡卿张盈云南农业大学植物保护学院云南昆明650500 贵州省农业科学院植物保护研究所贵州贵阳550006 贵州省农药风险监测中心贵州贵阳550006

为明确白及初加工过程中多菌灵、三唑酮、戊唑醇和苯醚甲环唑的残留变化规律和加工因子,在实验室条件下,模拟白及的清洗、水煮和烘干3个初加工过程,采用超高效液相色谱串联质谱法(ultra high performance liquid chromatography-tandem ... 详细信息

为明确白及初加工过程中多菌灵、三唑酮、戊唑醇和苯醚甲环唑的残留变化规律和加工因子,在实验室条件下,模拟白及的清洗、水煮和烘干3个初加工过程,采用超高效液相色谱串联质谱法(ultra high performance liquid chromatography-tandem mass spectrometry,UHPLC-MS/MS)检测白及初加工各阶段的农药残留浓度,并计算加工因子。结果表明,白及不同加工过程对4种杀菌剂残留浓度的影响差异较大。清洗过程使农药残留浓度降低4.6%~57.8%,加工因子为0.42~0.95,在清水中分别添加质量分数2%淀粉、2%食盐和2%小苏打对农药的去除效果可提升1.4~7.3倍;水煮过程使农药残留浓度降低38.6%~67.8%,加工因子为0.32~0.61;烘干过程由于浓缩效应使农药残留浓度升高2.1~3.2倍,加工因子为2.08~3.23。白及依次经2%食盐水清洗、水煮4 min、60℃烘干的初加工全过程对4种杀菌剂的降解作用大于因脱水造成的浓缩作用,可降低4种杀菌剂在干白及产品中的残留风险,全过程加工因子为0.34~0.67。因此,以鲜白及中4种杀菌剂残留评价经此初加工后干白及中4种杀菌剂残留的安全性是可行的,研究结果可为白及产品的安全风险评估提供基础数据参考。

关键词：白及杀菌剂残留变化初加工加工因子

Cable attenuation study of Tibet water Cherenkov muon detector array-A

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Nuclear Science and Techniques 2011年第4期22卷 230-234页

作者： GOU Quanbu guo yiqing LIU Cheng QIAN Xiangli HOU Zhengtao Key Laboratory of Particle Astrophysics Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China Department of Physics Shandong University Jinan 250100 China Department of Physics Hebei Normal University Shijiazhuang 050016 China

This work aims at online calibration of signal attenuation of the long cable used in Tibet water Cherenkov muon detector array-A (Tibet MD-A) under the Tibet air shower *** on a waterproof connection of the signal cable to PMT (R3600_06) and characters of the high voltage divider,terminal reflection method is used for measuring the signal attenuation with a practical way to eliminate contribution of the pulse *** measurement data-taking method (with charge-to-digital conversion) was carried out by using open-ended cables,confirming that terminal reflection method is a fast and convenient,and suitable to online calibration of the signal attenuation for Tibet *** 26℃,the measured attenuation coefficient with the 250-m cable connected permanently to the PMT,was ～13.9%.The cable frequency response was measured by using the sinusoidal *** method could be used to study time dispersion of signals produced with Tibet MD-A detector via Fourier analysis.

关键词：探测器阵列信号电缆信号衰减 μ介子西藏防水频率响应测量测量数据

Evolutionary conservation of Dmrt gene family in amphibi-ans, reptiles and birds

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Chinese Science Bulletin 2001年第23期46卷 1992-1995页

作者： REN Lili CHENG Hanhua guo yiqing HUANG Xiao LIU Li ZHOU Rongjia Department of Genetics and Center for Developmental Biology College of Life SciencesWuhan UniversityWuhan 430072China

Sex determining gene Mab-3 of C. elegans and doublesex of Drosophila contain a common DNA binding motif called a DM domain, both of which regulate similar aspects of sexual development. Human doublesex-related gene DMRT1 has been identified, which also contains the conserved DM-related DNA-binding domain and plays an essential role in gonadal differentiation. We present the amplification of a broad spectrum of DM domain sequences from phylogenetic diverse vertebrates (Cynops orientalis, Chrysemys scripta elegans and Coturnix coturnix) using degenerate PCR. Our results further reveal the unexpected complexity and the evolutionary conservation of the DM domain gene family.

关键词： DM domain degenerate PCR gene family phylogenet- ics.

钢筋混凝土简支梁不同工况下自振频率和阻尼比试验研究

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中国铁道科学 2008年第1期29卷 36-40页

作者：卜建清郭奕清石家庄铁道学院土木工程分院河北石家庄050043 中国铁道科学研究院工程咨询有限公司北京100081

为了探索钢筋混凝土简支梁在不同工况下自振频率和模态阻尼比的变化规律，预制了长4．0m、跨度3．8m、横截面0．2m×0．3m的4片等截面钢筋混凝土简支梁，分别配有3根直径为12，16，20和25mm的钢筋，完成养护之后进行室内试验。根据不同... 详细信息

为了探索钢筋混凝土简支梁在不同工况下自振频率和模态阻尼比的变化规律，预制了长4．0m、跨度3．8m、横截面0．2m×0．3m的4片等截面钢筋混凝土简支梁，分别配有3根直径为12，16，20和25mm的钢筋，完成养护之后进行室内试验。根据不同梁的承载能力情况，加载分为5～10级，各级静载在梁顶（3／4）L处持续0．5h后卸载，进行模态试验。在梁顶（5／8）L处用12磅锤击打，在梁底均匀分布7个加速度传感器测试加速度响应，采样频率为2000Hz。用DASP2003软件分析测试数据，得到各阶自振频率及其相应的模态阻尼比。结果表明：钢筋混凝土简支梁的自振频率随着荷载的增加而减小，规律非常明显，但模态阻尼比则没有规律性的变化。

关键词：钢筋混凝土简支梁频率阻尼刚度试验

Utility of Allelopathic Rice Cultivars in Suppressing of Barnyardgrass(Echinochloa crus-galli)and Rreducing the Rate of Herbicide

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Utility of Allelopathic Rice Cultivars in Suppressing of Bar...

An environment-friendly control method for congestion flow ahead of expressway toll stations

中国第四届植物化感作用学术研讨会

作者： yiqing guo Donghyung Shin Kilung Kim Dept.of Agronomy College of Agriculture and Life sciencesKyungpook National University Daegu 702-701Republic of Korea Biotechnology & Genetic Germplasm Research Institute Yunnan Academy of Agricutural Sciences

Pot experiment and herbicide bioassay were conducted to compare the barnyardgrass suppression by 3 rice ***(allelopathic),*** (non-allelopathic)and cv.K21(newly bred potent allelopathic).The consequence of

关键词： Rice allelopathy barnyardgrass reduce rates of herbicide

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Journal of Southeast University(English Edition) 2016年第4期32卷 479-483页

作者：崔洪军郭一晴李霞李霖河北工业大学土木与交通学院天津300401

To alleviate the resulting increase in energy consumption and emissions and other issues caused by the traffic congestion ahead of the expressway toll station, a novel traffic flowcontrol method is put forward based on the environment-friendly conception. The technical thinking of inducing the slowly moving traffic into a batch pass is determined based on the conclusion of the research, traffic flowtheory and traffic sensing detection technology. The model of stop times is established and the parameters of the system are optimized in accordance with the principle of minimizing the fuel consumption. The optimal location selection of traffic control lights and Detector 2 for queue of different lengths at toll stations are calculated based on the model. Finally, the effect of the congestion flowcontrol system is verified via the Paramics simulation system. The result shows that the control system is capable of reducing90% of fuel consumption for vehicles going through toll stations.

关键词： traffic engineering traffic congestion traffic flow theory toll station fuel consumption

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宇宙线起源中物理学前沿问题

科学通报 2016年第11期61卷 1188-1209页

作者：胡红波郭义庆中国科学院高能物理研究所北京100049

宇宙线是由奥地利物理学家赫斯在1912年高空气球实验中发现的.此后,人们在宇宙线的研究中发现了众多的基本粒子及其相互作用规律,中微子振荡的最早发现也来自太阳中微子和大气中微子实验.迄今为止,人们所知道的最高能量的粒子也来自于... 详细信息

宇宙线是由奥地利物理学家赫斯在1912年高空气球实验中发现的.此后,人们在宇宙线的研究中发现了众多的基本粒子及其相互作用规律,中微子振荡的最早发现也来自太阳中微子和大气中微子实验.迄今为止,人们所知道的最高能量的粒子也来自于宇宙线的观测.宇宙线的起源、加速和传播是一个世纪科学问题,从中诞生了高能伽玛天文学、高能中微子天文学和极高能宇宙线天文学.目前,人们已经发现了为数众多的电子加速源,但作为宇宙线成分中最为主要的核子,其起源问题依然没有解决.精确测量宇宙线核子的成分和能谱,观测和研究高能伽玛射线、高能中微子及极高能宇宙线的产生地点和相关机制,有助于解决宇宙线的起源问题.此外,这些研究也是间接探测暗物质粒子,研究宇宙演化和新物理学规律的重要手段.

关键词：宇宙线伽玛射线中微子

A New Bioassay Method for Evaluation Allelopathic Potential of Rice Germplasm

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Journal of Life Sciences 2016年第3期10卷 128-133页

作者： Yongliang Lu Hong Lu Kilung Kim Yiding Sun Jian Fu yiqing guo ChinaNationalRiceResearchInstitute ChineseAcademyofAgriculturalSciencesHangzhou310006China NationalCenterforAgro-Biodiversity/YunnanAgriculturalUniversity Kunming650201China CollegeofAgricultureandLifeScience KyungpookNationalUniversityDaegu702-701Korea Biotchnology&GermplasmResourceInstitute YunnanAcademyofAgriculturalSciencesKunming650223China

Allelopathy was defined in 1996 by IAS （international allelopathy society） as any process involving secondary metabolites produced by plant, algae, bacteria and fungi that influences the growth and development of agricultural and biological systems. Rice allelopathy against weeds was reported since 1989, which offers an integrated weed management with substantially reduced herbicide usage. Application of allelopathic rice cultivars is thought a resources conservation and environmental friendly way of weed bio-control, and could promote the sustainable development of agriculture. Screening or evaluating the allelopathic potential rice variety is the first step. In this paper, a new bioassay method was set up by the allelopathic potential of 9 rice lines on the target weed barnyardgrass （Echinochloa crusgalli）, and comparing with bioassay methods such as relay seeding in filter paper （RSF） and relay seeding in agar （RSA）. The results indicated that three methods had a same tendency in evaluating the allelopathic potential of rice; there existed a significant difference among different bioassay methods, and an interaction between bioassay methods and rice lines. The method of root exudates （RE） with the highest value and a correlation efficiency of 0.98 was considered as ideal bioassay method for evaluation of allelopathic potential.

关键词： Rice allelopathic potential bioassay methods comparison.

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土地革命战争时期苏区对戏曲音乐的利用

人民音乐 2019年第11期 61-63页

作者：郭轶青星海音乐学院

土地革命战争时期,红军为了在苏区(根据地)开展武装割据、土地革命和政权建设,充分利用了音乐艺术,并形成了独具艺术特色和历史文化价值的苏区音乐。苏区音乐绝大部分是利用既有歌曲(苏联革命歌曲、中国近代军歌、民歌等)曲调重新填词... 详细信息

土地革命战争时期,红军为了在苏区(根据地)开展武装割据、土地革命和政权建设,充分利用了音乐艺术,并形成了独具艺术特色和历史文化价值的苏区音乐。苏区音乐绝大部分是利用既有歌曲(苏联革命歌曲、中国近代军歌、民歌等)曲调重新填词的革命歌曲。这些填词歌曲就是《古田会议决议案》中所说的"革命歌谣"(1)。

关键词：土地革命战争时期革命歌曲古田会议决议案政权建设革命歌谣武装割据历史文化价值苏区