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四溴双酚A在水淹土壤中代谢产物分析

四溴双酚A在水淹土壤中代谢产物分析

水淹土壤-植物系统中四溴双酚A的降解与代谢

第八届全国分析毒理学大会暨中国毒理学会分析毒理专业委员会第五届会员代表大会

作者：孙棐斐 boris kolvenbach Peter Nastold 姜炳棋 Philippe Corvini 季荣污染控制与资源化研究国家重点实验室南京大学环境学院 Institute for Ecopreneurship School of Life SciencesUniversity of Applied Sciences and Arts Northwestern Switzerland

四溴双酚A(TBBPA)是被广泛应用在塑料和电子产品中的溴代阻燃剂,具有潜在的内分泌干扰活性,目前我国南部地区TBBPA的土壤污染已经非常普遍,然而有关TBBPA在环境中的归趋及代谢产物尚不甚清楚。采用放射性C示踪技术,我们研究了TBBPA在具... 详细信息

四溴双酚A(TBBPA)是被广泛应用在塑料和电子产品中的溴代阻燃剂,具有潜在的内分泌干扰活性,目前我国南部地区TBBPA的土壤污染已经非常普遍,然而有关TBBPA在环境中的归趋及代谢产物尚不甚清楚。采用放射性C示踪技术,我们研究了TBBPA在具有厌氧、厌氧两种区域状态的淹水土壤中的代谢产物形成。根据已有文献报道,TBBPA在厌氧条件下可被还原脱溴,最终降解为双酚A(BPA)[1];在好氧条件下BPA易被降解矿化[2],因此我们推测,在淹水土壤中形成的好氧/厌氧相邻区域,可能会促进TBBPA降解,降低其生态风险。实验结果显示,TBBPA在淹水土壤中培养66天后,在土壤中残留3.2%,低于文献中报道的在厌氧或者好氧土壤中TBBPA的残留。根据C信号,分离出土壤中代谢产物,经HPLC提纯后,采用GC-MS分析代谢产物结构,结果显示土壤中有11种代谢产物,包括好氧裂解产物、好氧O-甲基化产物、厌氧脱溴产物和甲酸酯,但没有检测到BPA。根据这些化合物结构,我们提出TBBPA在好氧-厌氧共存的淹水土壤中的5个相互交叉的代谢途径(如图1所示):(I)基于分子骨架重排的裂解反应,(Ⅱ)O-甲基化,(III)Type II ipso-羟基取代,(Ⅳ)还原脱溴,和(V)酯化反应。本实验结果表明,水淹土壤虽然能促进TBBPA降解,然而形成了大量环境行为和毒性不明的代谢产物,特别是O-甲基化产物(约占10%)在土壤中相对持久,且比母体化合物有更强的亲脂能力,易于在生物体内富集。好氧-厌氧共存的环境普遍存在,如水稻田、湖泊和河流的浅水区域及消落带等,TBBPA在这些环境中的风险和毒性研究应考虑这些复杂代谢产物的贡献。

关键词：四溴双酚A 降解代谢路径代谢产物土壤

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水淹土壤-植物系统中四溴双酚A的降解与代谢

四溴双酚A(TBBPA)在土壤中代谢产物的C-14同位素示踪分析

第七次全国土壤生物与生物化学学术研讨会暨第二次全国土壤健康学术研讨会

四溴双酚A(TBBPA)是一种被广泛应用的溴代阻燃剂,具有潜在的内分泌干扰活性。目前我国南部地区TBBPA的土壤污染已经非常普遍。环境中的TBBPA在厌氧条件下通过微生物作用进行连续还原脱溴,最后形成在好氧条件下可以迅速降解的内分泌干扰...

四溴双酚A(TBBPA)是一种被广泛应用的溴代阻燃剂,具有潜在的内分泌干扰活性。目前我国南部地区TBBPA的土壤污染已经非常普遍。环境中的TBBPA在厌氧条件下通过微生物作用进行连续还原脱溴,最后形成在好氧条件下可以迅速降解的内分泌干扰物BPA。而在好氧条件下则是通过好氧微生物产生甲基化反应产生甲基化的代谢产物[1]。因此彻底降解TBBPA的一个重要

关键词：

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四溴双酚A(TBBPA)在土壤中代谢产物的C-14同位素示踪分析

天然气水合物储层性质对微波加热后储层温度的影响

第七次全国分析毒理学大会暨第四届分析毒理专业委员会第二次会议

作者：李芳捷汪佳佳 Peter Nastold 姜炳棋 Armin Zenker boris kolvenbach Philippe Corvini 季荣污染控制与资源化研究国家重点实验室南京大学环境学院 University of Applied Sciences and Arts Northwestern Switzerland University of Applied Sciences and Arts Northwestern Switzerland Muttenz CH-4132

四溴双酚A(TBBPA)是用量最大的溴代阻燃剂,有关其环境中代谢产物知之甚少。我们应用C-14同位素示踪技术,研究了TBBPA在土壤中的好氧代谢产物及代谢途径。我们首先根据C-14信号,用HPLC分离和富集代谢产物,然后用GC-MS对产物作结构分析。... 详细信息

四溴双酚A(TBBPA)是用量最大的溴代阻燃剂,有关其环境中代谢产物知之甚少。我们应用C-14同位素示踪技术,研究了TBBPA在土壤中的好氧代谢产物及代谢途径。我们首先根据C-14信号,用HPLC分离和富集代谢产物,然后用GC-MS对产物作结构分析。根据MS的特征碎片及溴同位素峰簇,我们鉴定出TBBPA

关键词：四溴双酚A(TBBPA) 代谢产物代谢途径

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中国石油大学学报(自然科学版) 2025年

作者：樊燊王旱祥张辛刘延鑫孙秉宇葛家旺葛城才刘博 KHROUSTALEV boris 管冰中国石油大学(华东)海洋物探及勘探开发装备国家工程研究中心中国石油大学(华东)机电工程学院山东威马泵业股份有限公司

为了弥补降压法开采后期储层结冰、水合物二次生成等方面的不足,运用微波加热技术向储层进行能量补充。选用漏泄同轴天线作为微波加热装置,根据装置结构设计天然气水合物储层微波加热工艺方案,并且建立水合物储层微波加热仿真模型,通过... 详细信息

为了弥补降压法开采后期储层结冰、水合物二次生成等方面的不足,运用微波加热技术向储层进行能量补充。选用漏泄同轴天线作为微波加热装置,根据装置结构设计天然气水合物储层微波加热工艺方案,并且建立水合物储层微波加热仿真模型,通过试验验证仿真模型的准确性,并分析储层性质对微波加热后储层温度的影响规律。结果表明:储层微波加热工艺方案能够有效提升储层温度,储层初始温度为2℃,微波加热后储层最高温度为26.22℃,平均温度为5.19℃;储层温度随着损耗因子的增大而增大,随着介电常数的增大而减小;随着储层密度和比定压热容的增大,储层升温效果变差;随着储层导热系数的增大,储层温度分布更加均匀。

关键词：天然气水合物储层性质微波加热储层温度微波天线

Surface-enhanced Raman scattering inside Au@Ag core/shell nanorods

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Nano Research 2016年第8期9卷 2303-2318页

作者： boris Khlebtsov Institute of Biochemistry and Physiology of Plants and Microorganisms Russian Academy of Sciences Saratov 410049 Russia Saratov National Research State University Saratov 410012 Russia

The design and synthesis of plasmonic nanoparticles with Raman-active molecules embedded inside them are of significant interest for sensing and imaging applications. However, direct synthesis of such nanostructures with controllable shape, size, and plasmonic properties remains extremely challenging. Here we report on the preparation of uniform Au@Ag core/sheU nanorods with controllable Ag shells of 1 to 25 nm in thickness. 1,4-Aminothiophenol （4-ATP） molecules, used as the Raman reporters, were located between the Au core and the Ag shell. Successful embedding of reporter molecules inside the core/shell nanoparticles was confirmed by the absence of selective oxidation of the amino groups, as measured by Raman spectroscopy. The dependence of Raman intensity on the location of the reporter molecules in the inside and outside of the nanorods was studied. The molecules in the interior showed strong and uniform Raman intensity, at least an order of magnitude higher than that of the molecules on the nanoparticle surface. In contrast to the usual surface-functionalized Raman tags, aggregation and clustering of nanoparticles with embedded molecules decreased the surface-enhanced Raman scattering （SERS） signal. The findings from this study provide the basis for a novel detection technique of low analyte concentration utilizing the high SERS response of molecules inside the core/shell metal nanostructures. As an example, we show robust SERS detection of thiram fungicide as low as 10-9 M in solutions.

关键词： surface-enhanced Ramanscattering (SERS) Au@Ag nanorods nanocuboids multipole plasmons

On approach for obtaining approximate solution to highly nonlinear oscillatory system with singularity

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Acta Mechanica Sinica 2020年第4期36卷 910-917页

作者： Zvonko Rakaric boris Stojic Department of Mechanics Faculty of Technical SciencesUniversity of Novi Sad21000 Novi SadSerbia Department of Mechanization and Design Engineering Faculty of Technical SciencesUniversity of Novi Sad21000 Novi SadSerbia

This paper deals with further investigations of recently introduced so-called low-frequency pendulum mechanism,which represents an extended form of classical *** equation of motion,which is in Eksergian’s form,is a singular and highly nonlinear second order differential *** is transformed by suitable choice of a new “coordinates”into classical form of nonlinear conservative oscillator containing only inertial and restoring force ***,due to the singularity of coefficient of governing equation that shows hyperbolic growth,Laurent series expansion was *** these,we derived a nonsingular nonlinear differential equation,for which there exists an exact solution in the form of a Jacobi elliptic *** using this exact solution,and after returning to the original coordinate,both explicit expression for approximate natural period and solution of motion of mechanism were *** between approximate solution and solution is obtained by numerical integration of exact equation shows noticeable *** of impact of mechanism parameters on period is given.

关键词： Pendulum mechanism Low frequency Singularity Laurent series Jacobi elliptic function

A Linear System Arising from a Polynomial Problem and Its Applications

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Chinese Annals of Mathematics,Series B 2007年第3期28卷 283-292页

作者： boris SHEKHTMAN Department of Mathematics University of South FloridaPHY1144202 E Fowler AvenueTampaFL 33620-5700USA.

A linear system arising from a polynomial problem in the approximation theory is studied, and the necessary and sufficient conditions for existence and uniqueness of its solutions are presented. Together with a class of determinant identities, the resulting theory is used to determine the unique solution to the polynomial problem. Some homogeneous polynomial identities as well as results on the structure of related polynomial ideals are just by-products.

关键词： Linear system Determinant identity Polynomial ideal in two variables

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The Log Minimal Model Program for Horospherical Varieties Via Moment Polytopes

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Acta Mathematica Sinica,English Series 2018年第3期34卷 542-562页

作者： boris PASQUIER Institut Montpelliérain Alexander Grothendieck CNRS Univ. Montpellier Laboratoire de Mathématiques et Applications CNRS Université de Poitiers

In a previous work, we described the Minimal Model Program in the family of Q-Gorenstein projective horospherical varieties, by studying certain continuous changes of moment polytopes of polarized horospherical varieties. Here, we summarize the results of the previous work and we explain how to generalize them in order to describe the Log Minimal Model Program for pairs（X, Δ） when X is a projective horospherical variety.

关键词： Log minimal model program horospherical varieties moment polytopes

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Chances and challenges in China

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Protein & Cell 2016年第4期7卷 233-235页

作者： boris Tefsen Department of Biological Sciences Xi'an Jiaotong-Liverpool University Suzhou China

So there I was, 35 years old and at the crossroads of my scientific career. The current academic system in the Netherlands, like in many other places around the world （Powell, 2015）, is not designed to have scientists staying in a postdoc position forever. So, you are either deemed good enough to become a permanent staff member, or you have to leave academia at some point and try your luck in a pharmaceutical company or elsewhere. I had not succeeded in the former, but I also did not want to do the latter, so I took a less threaded path and headed to China.

关键词： Chances challenges China

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