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Enhanced and irreversible sorption of pesticide pyrimethanil by soil amended with biochars

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Journal of Environmental Sciences 2010年第4期22卷 615-620页

作者： Xiangyang Yu ligang pan Guangguo Ying Rai S. Kookana Pesticide Biological 6 Ecological Research Center Jiangsu Academy of Agricultural Sciences Nanjing 210014 China. CSIRO Land and Water PMB No 2 Glen Osmond 50641 South Australia Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China Beijing Research Center for Agrifood Testing and Farmland Monitoring Beijing 100097 China

Biochar derived from partial combustion of vegetation is ubiquitous and potentially effective in sequestration of environmental contaminants. Biochars were prepared by burning of red gum （Eucalyptus spp.） woodchips at 450 and 850℃ （labeled as BC450 and BC850）. These two biochars were found to possess markedly different properties in terms of surface area and porosity. Short-term equilibration tests （24 hr） were conducted to assess the sorption-desorption behavior of pyrimethanil in the soil amended with various amounts of biochar of each type, with a special focus on the desorption behavior of the sorbed pesticide through four times successive desorption by dilution. Sorption coefficient and isotherm nonlinearity of the amended soils progressively increased with the content of biochar in the soil. Biochar BC850 with higher surface area and microporosity showed a stronger effect on the reversibility of sorption pesticide. The soils amended with 5% BC450 and 1% BC850 had nearly the same sorption capacity for pyrimethanil; however, their desorption processes were very different with 13.65% and 1.49% of the sorbed pesticide being released, respectively. This study suggested that biochar in soil could be an important factor for immobilization of a pesticide and thus affecting its environment fate in soil.

关键词： biochar pyrimethanil sorption desorption

Primary malignant melanoma of the esophagus

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The Chinese-German Journal of Clinical Oncology 2008年第2期7卷 121-123页

作者： ligang Liu Tiecheng pan Xiang Wei Yonghao You Department of Cardiothoracic Surgery Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430030 China

Primary malignant melanoma of the esophagus （PMME） is an extremely rare and aggressive tumor, comprising less than 0.2% of all primary esophageal neoplasms. There are fewer than 270 reported cases in worldwide literature, most of which are scattered cases reported. This tumor has usually been reported as a pedunculated, polypoid tasion in the middle and lower third of the esophagus. Hematogenic and lymphogenic metastases are commonly reported for PMME cases. Although surgical resection has been considered as the best possible option, the prognosis has been nonetheless poor, even combined with adjuvant chemotherapy postoperatively, according to the literatures. Here we reported such a case on its clinical presentations and treatment.

关键词： primary esophageal melanoma

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真菌毒素脱毒技术研究进展

食品工业科技 2024年第5期45卷 377-383页

作者：马帅李安潘立刚北京市农林科学院质量标准与检测技术研究所北京100097

真菌毒素是产毒丝状真菌产生的有毒次级代谢产物,存在于农产品及其制品中,严重危害人类和动物健康。近年来,研究人员围绕真菌毒素的去除开展了大量的研究工作。本文主要综述了真菌毒素的污染特点、限量标准以及脱毒技术,重点系统总结了... 详细信息

真菌毒素是产毒丝状真菌产生的有毒次级代谢产物,存在于农产品及其制品中,严重危害人类和动物健康。近年来,研究人员围绕真菌毒素的去除开展了大量的研究工作。本文主要综述了真菌毒素的污染特点、限量标准以及脱毒技术,重点系统总结了基于石墨烯、金属有机骨架和磁性纳米材料吸附剂的真菌毒素物理吸附脱毒技术研究进展,进一步促进新型功能纳米材料在物理吸附技术中的发展,推动物理吸附脱毒技术在真菌毒素防控中的应用。

关键词：真菌毒素脱毒技术物理吸附新型功能纳米材料

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1-甲基环丙烯结合植酸处理对菠菜保鲜效果的影响

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食品科学 2023年第1期44卷 231-238页

作者：张悦李安潘立刚赵杰北京市农林科学院质量标准与检测技术研究所北京100097 北京农学院食品科学与工程学院北京102206

菠菜采后贮藏过程中易出现氧化失水、萎蔫腐烂导致损耗严重等问题,基于此,本实验采用保鲜剂1-甲基环丙烯(1-methylcyclopropene,1-MCP)与植酸(phytic acid,PA)处理采后菠菜,探究保鲜剂对菠菜的生理及贮藏品质的影响。先通过不同剂量(0、... 详细信息

菠菜采后贮藏过程中易出现氧化失水、萎蔫腐烂导致损耗严重等问题,基于此,本实验采用保鲜剂1-甲基环丙烯(1-methylcyclopropene,1-MCP)与植酸(phytic acid,PA)处理采后菠菜,探究保鲜剂对菠菜的生理及贮藏品质的影响。先通过不同剂量(0、1、2、4μL/L)1-MCP和不同质量分数(0、0.1%、0.2%、0.4%)PA单独处理菠菜,确定最适1-MCP剂量和PA质量分数,之后选择最适剂量(1μL/L)1-MCP和适宜质量分数(0.1%)PA分别单独处理及1μL/L 1-MCP+0.1%PA复合处理菠菜,于室温(20±1)℃、相对湿度80%~90%条件下贮藏,用无保鲜剂处理的菠菜作为对照。以腐烂指数、质量损失率、叶绿素相对含量、可溶性固形物质量分数、乙烯释放量、过氧化物酶(peroxidase,POD)活力、1,1-二苯基-2-三硝基苯肼(1,1-diphenyl-2-picrylhydrazyl,DPPH)自由基清除率为评价指标,分析1μL/L 1-MCP、0.1%PA单独处理及1μL/L 1-MCP+0.1%PA复合处理对菠菜采后生理及贮藏过程中相关理化特性的影响,并在贮藏期内对菠菜的外观、形态、气味感官性状进行综合感官评价。结果表明,1μL/L 1-MCP、0.1%PA、1μL/L 1-MCP+0.1%PA 3种处理方式对采后菠菜均有一定的保鲜效果,与其他3组相比,1μL/L 1-MCP+0.1%PA复合处理能明显增强POD活力,提升DPPH自由基清除率,从而延缓腐烂指数、质量损失率、乙烯释放量的上升,提升贮藏期内菠菜的叶绿素相对含量并保持较高的可溶性固形物质量分数和感官评分,有效延缓了菠菜的腐烂变质。本研究结果表明,1μL/L 1-MCP+0.1%PA复合处理菠菜的保鲜效果最佳,能有效延缓菠菜采后衰老和品质劣变。

关键词： 1-甲基环丙烯植酸采后生理贮藏保鲜菠菜

Pulmonary inflammatory pseudotumor caused by Cryptococcus presenting multiple nodules in bilateral lungs

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The Chinese-German Journal of Clinical Oncology 2006年第6期5卷 460-462页

作者： ligang Liu Tiecheng pan Xiang Wei Jun Li Tao Chen Zhi Zheng Department of Thoracic and Cardiac Surgery Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430030 China

By now there are a few reports describing a case of pulmonary inflammatory pseudotumor,presenting multiple nodules in bilateral lungs and a pseudotumor caused by fungus infection is also a very rare *** we report a rare case of pulmonary inflammatory pseudotumor with confirmed cause by Cryptococcus infection presenting multiple nodules in bilateral lungs.

关键词： pulmonary fungal inflammatory pseudotumor radiological presentation

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保鲜剂在蔬菜贮运中的研究进展

食品与发酵工业 2022年第17期48卷 345-352页

作者：张悦李安赵杰潘立刚北京农学院食品科学与工程学院北京102206 北京市农林科学院质量标准与检测技术研究所北京100097

采后蔬菜是鲜活易腐的农产品,由于自身生理代谢旺盛、病原微生物的侵染、贮藏方法不正确等造成贮运中极易出现腐烂损耗的情况。正确使用保鲜剂不仅能够保持蔬菜的品质,还能为贮存运输提供便利。近年来,保鲜剂在蔬菜采后保鲜、贮藏及流... 详细信息

采后蔬菜是鲜活易腐的农产品,由于自身生理代谢旺盛、病原微生物的侵染、贮藏方法不正确等造成贮运中极易出现腐烂损耗的情况。正确使用保鲜剂不仅能够保持蔬菜的品质,还能为贮存运输提供便利。近年来,保鲜剂在蔬菜采后保鲜、贮藏及流通中发挥着越来越重要的作用。该文在简述保鲜剂原理的基础上,按保鲜剂的保鲜机理及特性对保鲜剂进行了分类,并从生物保鲜剂、化学保鲜剂、植物生长物质类保鲜剂、食品添加剂类保鲜剂4个方面介绍了蔬菜保鲜剂的原理和特性。重点阐述植物源、动物源、微生物源及化学源保鲜剂在蔬菜贮运中的研究进展。最后对保鲜剂向高效保鲜、安全卫生以及复合型保鲜剂的开发研究等方向的发展前景进行了展望。

关键词：保鲜剂分类保鲜贮藏蔬菜

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The Detection of Soluble Solid Contents and Conductivity of Apple Juice by Homemade Near Infrared Spectrometer

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The Detection of Soluble Solid Contents and Conductivity of ...

石墨相氮化碳在食品分析前处理制备技术中的发展和应用

作者： Dazhou Zhu Zhihong Ma Anxiang Lu Liu Zhao Zhenhua Tu Cheng Wang ligang pan Nation Engineering Research Center for Information Technology in Agriculture Beijing Research Center for Agri-Food Testing and Farmland Monitoring College of Food Science and Nutritional Engineering China Agricultural University

The detection of apple juice is very important for its quality and safety *** developing of fast,non-invasive detection system is beneficial to the improvement of producing efficiency and *** this study,the homemade near infrared（NIR） spectrometer was applied to detect the soluble solid contents（SSC） and conductivity of apple juice,and the performance of homemade NIR analyzer and the feasibility of detecting conductivity by NIR spectra were *** varieties of apples（totally 120 samples） were collected,including Fuji apple,American green apple,and Chinese green *** fresh pellucid apple juice was made and their spectra were measured by a homemade charge coupled device（CCD） NIR *** result showed that homemade CCD NIR spectrometer could accurately predict the SSC of apple juice in the wavelength range of780-1100 nm combined with partial-least square *** correlation coefficient of calibration was r = 0.96,the standard deviation of prediction was SEP = 0.45°Brix,the relative of SEP was SEP%= 3.75%.The results indicated that the homemade NIR analyzer applied in this study had good performance,and the predictive ability of model was as good as that obtained by FT-NIR *** spectra and the conductivity of apple juice had some correlation（r = 0.77）,but the prediction accuracy was *** prediction result was SEP = 0.30,SEP%= 15.14%.From the analysis of regression coefficients of PLS model,it can be concluded that the conductivity and NIR spectra may have some indirect relation through the ionization of organic acid.

关键词： Near Infrared Spectroscopy Homemade Spectrometer Apple Juice SSC Conductivity

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食品科学 2020年第19期41卷 296-302页

作者：马帅由天艳王坤王蒙潘立刚北京农业质量标准与检测技术研究中心北京100097 江苏大学农业装备工程学院现代农业装备与技术教育部重点实验室江苏镇江212013

石墨相氮化碳(g-C3N4)是一种新型的二维石墨烯类似物,在分离科学和前处理制备技术方面具有巨大的应用潜力。g-C3N4具有超高硬度、低密度、良好的生物相容性、表面可修饰和较强的吸附亲和力等优异性能。g-C3N4的制备和吸附条件决定了材... 详细信息

石墨相氮化碳(g-C3N4)是一种新型的二维石墨烯类似物,在分离科学和前处理制备技术方面具有巨大的应用潜力。g-C3N4具有超高硬度、低密度、良好的生物相容性、表面可修饰和较强的吸附亲和力等优异性能。g-C3N4的制备和吸附条件决定了材料的结构和表面理化性质,其内置富氮官能团和电子离域性质赋予其多种吸附机理,包括络合效应、氢键、氧化还原反应、π-π共轭效应、疏水作用、酸碱反应和静电相互作用等。当前,g-C3N4与固相萃取、磁性固相萃取和固相微萃取等技术相结合,已应用于食品分析样品的前处理制备。本文重点介绍g-C3N4的结构性能、吸附机理以及在样品前处理中的应用,以加强对g-C3N4优异性能的认识,促进g-C3N4在食品分析样品前处理中的发展和应用。

关键词：样品前处理石墨相氮化碳结构性能吸附机理

稳定同位素质谱法鉴别芝麻油中掺杂大豆油、玉米油的研究

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中国油脂 2020年第3期45卷 32-37页

作者：靳欣欣潘立刚李安北京农业质量标准与检测技术研究中心、农业部农产品质量安全风险评估实验室(北京) 农产品产地环境监测北京市重点实验室北京100097

利用稳定同位素质谱法进行芝麻油掺杂鉴别的研究。选定C3植物油大豆油、C4植物油玉米油作为掺杂油,测定了芝麻油掺入质量分数分别为5%、10%、15%、20%、30%、50%、80%掺杂油的δ13C、δ2H、δ18O值。结果表明:用δ13C、δ2H二维稳定同... 详细信息

利用稳定同位素质谱法进行芝麻油掺杂鉴别的研究。选定C3植物油大豆油、C4植物油玉米油作为掺杂油,测定了芝麻油掺入质量分数分别为5%、10%、15%、20%、30%、50%、80%掺杂油的δ13C、δ2H、δ18O值。结果表明:用δ13C、δ2H二维稳定同位素比值对大豆油掺杂油样品进行判别,比仅依靠单一δ13C值或δ2H值进行判别的灵敏度有所提升,同时发现δ18O值与掺杂油的比例没有明显的线性关系。二元回归模型可以对芝麻油中掺杂10%大豆油或5%玉米油定量判别。

关键词：芝麻油掺杂识别稳定同位素质谱法鉴定大豆油玉米油