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复合调味料中邻苯二甲酸酯污染水平和膳食风险评估

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中国调味品 2024年第3期49卷 161-168页

作者：刘欢汪恩婷周邦萌黄思瑜薛源明秦德萍骆小方刘方菁黄先亮重庆市食品药品检验检测研究院重庆401121 重庆大学生物工程学院重庆400044 国家市场监管重点实验室(调味品监管技术) 重庆401121 重庆市计量质量检测研究院重庆401121

该研究旨在建立高效、绿色、低成本的同时测定复合调味料中18种邻苯二甲酸酯类化合物的气相色谱-质谱-同位素内标法。对市售5个细类439批次复合调味料中2种常见的塑化剂邻苯二甲酸二丁酯(DBP)、邻苯二甲酸二(2-乙基己基)酯(DEHP)的污染... 详细信息

该研究旨在建立高效、绿色、低成本的同时测定复合调味料中18种邻苯二甲酸酯类化合物的气相色谱-质谱-同位素内标法。对市售5个细类439批次复合调味料中2种常见的塑化剂邻苯二甲酸二丁酯(DBP)、邻苯二甲酸二(2-乙基己基)酯(DEHP)的污染水平开展调查检测,并进行膳食风险评估。DBP在5类复合调味料中均有检出,DEHP在除料酒外的4类复合调味料中均有检出,其中DBP在香辛料调味油和火锅底料中检出率最高,分别高达36.3%和24.7%,且均超过风险研判值0.3 mg/kg,最高检出量分别为25.49 mg/kg和11.01 mg/kg;DEHP在香辛料油、火锅底料和酱类中检出率较高,分别为27.7%、23.8%和30.0%,最高检出量分别为14.20,7.48,1.01 mg/kg,共计8批次超过了风险研判值1.5 mg/kg。以该研究中最高检出浓度计算,居民每天通过火锅底料摄入的DBP和DEHP的量分别为4.11μg/(kg·bw)和6.06μg/(kg·bw),通过香辛料调味油摄入的DBP和DEHP的量分别为0.53μg/(kg·bw)和0.30μg/(kg·bw),通过料酒摄入的DBP的量为0.04μg/(kg·bw),通过半固体调味料摄入的DBP和DEHP的量分别为2.68μg/(kg·bw)和0.35μg/(kg·bw),通过酱类摄入的DBP和DEHP的量分别为0.56μg/(kg·bw)和0.50μg/(kg·bw),远低于健康指导值,无明显膳食风险。该研究有助于从源头上防控复合调味料中邻苯二甲酸酯类化合物的安全风险,为监管部门精准布控提供数据支撑。

关键词：复合调味料邻苯二甲酸酯(PAEs) 暴露评估

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Lorentz violation induces isospectrality breaking in Einstein-bumblebee gravity theory

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Science China(Physics,Mechanics & Astronomy) 2024年第8期67卷 87-96页

作者： Wentao liu Xiongjun fang Jiliang jing Jieci Wang Department of Physics Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of EducationSynergetic Innovation Center for Quantum Effects and ApplicationsHunan Normal UniversityChangsha 410081China

In this study,we investigate the quasinormal modes(QNMs)of a Lorentz-violating spacetime,factoring in a cosmological constant,within the framework of Einstein-bumblebee *** findings reveal that the interaction of spacetime with an anisotropic bumblebee field imparts distinct contributions to the axial and polar sectors of the vector *** subsequently breaks the isospectrality typically observed in vector *** evidence strongly indicates isospectral breaking in the vector modes of Einstein-bumblebee black holes:a pronounced breakage in the real part of the frequencies,while the imaginary component seems less *** isospectral breaking indicates the existence of two different waveforms in the Ringdown phase of the black hole,which provides a potential signal of quantum gravity observable in current experiments.

关键词： Lorentz-violating isospectral breaking quasinormal modes

Chronic administration of triclosan leads to liver fibrosis through hepcidin-ferroportin axis-mediated iron overload

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Journal of Environmental Sciences 2024年第3期137卷 144-154页

作者： jing liu Lecong Zhang fang Xu Ping Zhang Yang Song College of Eco-Environmental Engineering Guizhou Minzu UniversityGuiyang 550025China The Institute of Karst Wetland Ecology Guizhou Minzu UniversityGuiyang 550025China State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China

Triclosan(TCS)has been manufactured as an antibacterial compound for half a ***,it is widely used in various personal care products;however,its potential adverse effects raise a lot of ***,we create a long-term oral administration mouse model and identify the corresponding hepatotoxicity of *** discover that daily intragastric administration of 10 mg/kg TCS to mice for 12 weeks results in severe hepatic *** study displays that hepatic iron increased 18%,23%and 29%upon oral TCS treatment for4,8 and 12 weeks,*** by hepatic iron variation,splenic and duodenal iron are increased,which indicates systemic iron *** only excessive iron accumulated in the liver,abnormal hepatic malondialdehyde,prostaglandin synthase 2 and glutathione peroxidase 4 are pointed to *** study uncovers that hepcidin expression increases 7%,10%,4%in serum and 2.4-,4.8-,and 2.3-fold on transcriptional levels upon TCS exposure for 4,8 and 12 weeks,*** together,the mice in the TCS-treated group show disordered systemic iron homeostasis via the upregulated hepatic hepcidin-ferroportin ***,both hepatic iron overload(systemic level)and hepatocyte ferroptosis(cellular level)are accused of TCS-induced liver ***■,an iron scavenger,significantly ameliorates TCS-induced liver *** summary,this study confirms the impact of TCS on liver fibrosis;a critical signal pathway is also *** significance of the current study is to prompt us to reevaluate the“pros and cons”of TCS applications.

关键词： Triclosan Iron metabolism Hepcidin Hepatotoxicity Liver fibrosis

Strong hetero-interface interaction in 2D/2D WSe_(2)/ZnIn_(2)S_(4) heterostructures for highly-efficient photocatalytic hydrogen generation

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Journal of Energy Chemistry 2024年第10期97卷 379-387,I0008页

作者： Xu Guo Xing liu jing Shan Zhuo Xu Zhiming fang Lu Wang Shengzhong liu School of Energy Powerand Mechanical EngineeringNorth China Electric Power UniversityBeijing 102206China Shaanxi Key Laboratory for Advanced Energy Devices School of Materials Science and EngineeringShanxi Normal UniversityXi'an 710119ShanxiChina Qinghai Advanced Energy Storage Laboratory SPIC Qinghai Photovoltaic Industry Innovation Center Co.Ltd.State Power Investment CorporationXining 810oo7QinghaiChina Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Green hydrogen is urgently required for sustainable development of human beings and rational construction of heterostructures holds great promising for photocatalytic hydrogen ***,2D/2D WSe_(2)/ZnIn_(2)S_(4) heterostructures with strong hetero-interface interaction and abundant contact were constructed via an impregnation-annealing *** charge transfer from ZnIn_(2)S_(4) to WSe_(2)was evidenced by transient absorption spectroscopy in crafted heterostructures owing to the tight and2D face-to-face *** a result,the prepared WSe_(2)/ZnIn_(2)S_(4) heterostructures exhibited boosted photocatalytic performance and a highest hydrogen evolution rate of 3.377 mmol/(g h)was achieved with an apparent quantum yield of 45.7%at 420 *** work not only provides new strategies to achieve efficient 2D/2D heterostructures but also paves the way for the development of green hydrogen in the future.

关键词： Strong hetero-interface interaction in 2D/2D WSe_(2)/ZnIn_(2)S_(4) heterostructures for highly-efficient photocatalytic hydrogen generation

Characteristics,origins,and significance of pyrites in deep-water shales

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Science China Earth Sciences 2024年第2期67卷 313-342页

作者： Chao LIANG Shichao JI Yingchang CAO Keyu liu jing WU fang HAO National Key Laboratory of Deep Oil and Gas China University of Petroleum(East China)Qingdao266580China School of Geosciences China University of PetroleumQingdao266000China Laboratory for Marine Mineral Resource Qingdao National Laboratory for Marine Science and TechnologyQingdao266071China College of Earth Science and Engineering Shandong University of Science and TechnologyQingdao266590China

As important metal sulfides in the geochemical cycle of sulfur,the characteristics and formation processes of pyrites can provide useful clues regarding their *** on previous findings,shale pyrites were divided into three major classes(euhedral pyrites,framboidal pyrites(framboids)and metasomatic pyrites)and six sub-classes in this *** the microscopic scale,each type of pyrite is associated with a different formation *** are formed by burst nucleation in environments with a homogeneous distribution of nutrients while euhedral pyrites are usually formed on pre-existing sites(such as=FeS on the minerals surface)in the heterogeneous *** pyrites formed by the replacement of other ions in accountable material by iron ions and hydrogen sulfide ions in hydrothermal *** morphology and isotope value of pyrite provide information to track the origins of their nutrient and characteristics of sulfur and iron *** addition,the trace element content of pyrite can serve as a proxy for paleo-ocean trace element abundance,indicating changes in atmospheric oxygen ***,pyrite can also serves as an indicator of shale gas reservoirs.

关键词： Shale Pyrite Sulfate reduction reaction Isotope fractionation Pyrite element

Investigation on the structural feature of Shengli lignite

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International Journal of Mining Science and Technology 2018年第2期28卷 335-342页

作者： Zhang Yang-Yang Zong Zhi-Min Sun Yi-Bing liu fang-jing Li Wei-Tu Wang Ya-Nan Wei Xian-Yong Key Laboratory of Coal Processing & Efficient Utilization Ministry of Education China University of Mining & Technology

The extraction residue from Shengli lignite was sequentially dissolved in cyclohexane, benzene, methanol, ethanol, and isopropanol in an autoclave at 320℃ to afford soluble portions(SPs) 1–5(SP_1-SP_5) and the final residue(FR). The total yield of SP_1-SP_5 is ca. 55.1%. The FR was subjected to ruthenium ioncatalyzed oxidation and the resulting products were isolated from the reaction mixture and *** the esterified products and SP_1-SP_5 were analyzed with a gas chromatograph/mass *** total, 342 compounds were identified in SP_1-SP_5. They can be classified into normal alkanes, branched alkanes, alkenes, alkanedienes, arenes, alkanols, methylcycloalkanes, alkenols, alkylbenzenemethanols,arenols, anisol and substituted anisols, polymethyldihydrobenzofurans, arenofurans, dibenzofurans,ethoxymethylbenzenes, aldehydes, ketones, esters, nitrogen-containing organic compounds, sulfurcontaining organic compounds, and other compounds. Among the compounds, arenols are predominant in SP_1 and SP_2 and the main compounds in SP_3, while the main compounds in SP_4 and SP_5 are esters and arenes, respectively. According to the esterified products identified, the products from the FR oxidation can be grouped into non-benzene ring carboxylic acids(NBCAs) and benzenepolycarboxylic acids(BPCAs). The total yield of BPCAs is much higher than that of NBCAs, suggesting that the FR is rich in condensed aromatic moieties.

关键词： Lignite Arenols Esters Arenes Condensed aromatic moieties

Three dimensional velocity model and its tectonic implications at China Seismic Experimental Site,eastern margin of the Tibetan Plateau

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Science China Earth Sciences 2024年第7期67卷 2268-2290页

作者： Jianping WU Yan CAI Wei WANG Weilai WANG Changzai WANG Lihua fang Yaning liu jing liu Institute of Geophysics China Earthquake AdministrationBeijing 100081China Beijing Baijiatuan Earth Science National Observation and Research Station Beijing 1095China Beijing Earthquake Agency Beijing 100080China

The China Seismic Experimental Site(CSES)is located at the intersection of the Tibetan Plateau,South China Block,and Indian Plate and has complex geological settings and intense crustal deformation,making it one of the most seismically active areas in Chinese mainland.A high-resolution,three-dimensional(3D)crust-mantle velocity structure is crucial for understanding seismotectonic environments,lithospheric deformation mechanisms,and deep dynamic *** first constructed a high-vertical-resolution 3D initial velocity model using the joint inversion of receiver functions and surface waves and then obtained a 3D P-and S-wave velocity model(CSES-VM1.0)with the highest lateral resolution of 0.25°for the CSES using double-difference *** to the limitations of the Sn observation data,the resolution of the S-wave velocity model in the lower crust and upper mantle was reduced,making it closer to the initial model provided by joint inversion.A comparison with explosive-source seismic data showed that the synthetic P-wave first-arrival travel times of the new model were closer to the observations than those of the previous velocity *** velocity cross-sections across the source areas of the 2022 Lushan MS6.1 and Ludian MS6.8 earthquakes reveal that the former earthquake occurred near a weak contact zone between the Tibetan Plateau and Sichuan Basin,and the rupture of the latter earthquake occurred in a granitic area,with the northern end blocked by rigid high-velocity bodies.A clear high-velocity anomaly zone is distributed along the western margin of the Yangtze Block,revealing the spatial distribution of Neoproterozoic intermediate-basic *** high-velocity zone significantly controls the morphology of fault zones and influences the rupture processes of major *** northeast-southwest and north-south trending high-velocity anomalies were found near Panzhihua,potentially related to Neoproterozoic and Middle-Late Permian intermediate

关键词： Eastern Tibetan Plateau China Seismic Experimental Site Yangtze Block Velocity model Double-difference tomography

男性2型糖尿病患者血清白蛋白水平与骨密度关系的研究

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中华骨质疏松和骨矿盐疾病杂志 2024年第3期17卷 203-212页

作者：韩梅昝晓晖马邓荣郭馨远赵阳婷李凯陈重阳王亚雯刘靖芳兰州大学第一临床医学院兰州730000 兰州大学第一医院内分泌科兰州730000

目的探讨50岁以上男性2型糖尿病(diabetes mellitus type 2,T2DM)患者血清白蛋白(albumin,ALB)水平与骨密度(bone mineral density,BMD)的相关性。方法选取2021年7月~2022年3月兰州大学第一医院内分泌科住院的202例50岁以上男性T2DM患... 详细信息

目的探讨50岁以上男性2型糖尿病(diabetes mellitus type 2,T2DM)患者血清白蛋白(albumin,ALB)水平与骨密度(bone mineral density,BMD)的相关性。方法选取2021年7月~2022年3月兰州大学第一医院内分泌科住院的202例50岁以上男性T2DM患者及体检中心的30名男性健康对照者,根据血清ALB水平将T2DM患者分为3组:低ALB水平组(T1组,<40.0 g/L),ALB水平在正常范围者再根据二分位数水平分为两组,即T2组(40.0~43.3 g/L)和T3组(43.4~51.0 g/L),比较3组T2DM患者不同部位BMD水平和骨质疏松(osteoporosis,OP)/骨量减少患病率的差异,Pearson相关性分析血清ALB与不同部位BMD之间的相关性,多元线性回归分析血清ALB水平与不同部位BMD的独立相关性。结果T3组全髋和L2~L4的BMD水平显著高于T1组(均P<0.05)。T2组L2~L4的BMD水平显著高于T1组(P<0.05)。T3组L2~L4的OP/骨量减少的患病率显著低于T1组(8.9%vs.25.0%,P<0.05)。血清ALB水平与全髋和L2~L4的BMD水平呈正相关(r=0.204、0.143,均P<0.05)。多元线性回归分析显示,调整年龄、体质量指数(body mass index,BMI)、肾小球滤过率(estimated glomerular filtration rate,eGFR)、血清游离三碘甲状腺原氨酸(free triiodothyronine,FT3)、促甲状腺激素(thyroid-stimulating hormone,TSH)、γ-谷氨酰转移酶(γ-glutamyl transferase,GGT)、乳酸脱氢酶(lactate dehydrogenase,LDH)、肌酸激酶(creatine kinase,CK)、天冬氨酸转氨酶(aspartate transaminase,AST)、糖化血红蛋白(glycosylated hemoglobin,HbA1c)、钙(calcium,Ca)、磷(phosphorus,P)、尿酸(uric acid,UA)及尿白蛋白排泄率(urinary albumin excretion rates,UAER)等混杂因素后,血清ALB水平与全髋的BMD水平独立正相关(β=0.229,95%CI:0.000~0.019)。结论50岁以上男性T2DM患者血清ALB水平与BMD密切相关,中老年男性T2DM患者应该早期关注血清ALB水平的变化,为OP的防治提供线索。

关键词： 2型糖尿病骨质疏松血清白蛋白骨密度

Tracking the Confiscated Green Sea Turtles in the South China Sea:Where Did They Come From?Where Will They Go?

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Asian Herpetological Research 2024年第3期15卷 173-182页

作者： Min CHEN Tong HUANG Dayi NIE liu LIN fang CHEN jing WANG Jinyan YANG jing ZHANG Tong liu Yiqiong CUI School of Life Sciences Institute of Eco-ChongmingShanghai Institute of Wildlife EpidemicsEast China Normal UniversityShanghai 200241China Hainan Institute of East China Normal University Sanya 572025HainanChina Ministry of Education Key Laboratory for Ecology of Tropical Islands Key Laboratory of Tropical Animal and Plant Ecology of Hainan ProvinceCollege of Life SciencesHainan Normal UniversityHaikou 571158HainanChina Aquatic Wildlife Conservation Branch of China Wildlife Conservation Association Beijing 100013China Society of Entrepreneurs and Ecology Beijing 100012China Commonwealth Scientific and Industrial Research Organisation Canberra ACT 2601Australia

The population of the green sea turtle(Chelonia mydas)is under decline,threatened by bycatch and illegal acquisition despite worldwide protection ***,the confiscation of illegally acquired sea turtles could aid in tracking their origin and movement patterns,crucial for effective conservation *** satellite tracking and genetic analysis offers an opportunity to investigate the relationship between the origins and migration directions of green sea turtles in the western ***,we applied two methods to investigate the spatial ecology of 18 green turtles caught as bycatch in the South China *** results revealed the genetic origins and diverse movements of the *** Mixed Stock Analysis(MSA)suggested that these turtles originated from the rookery of the Xisha Islands(49.6%),central Ryukyu(24.6%),NE Borneo(8%),and the Sulu Sea(5.2%),with other rookeries in meagre proportions(<2%each).Satellite tracking showed the ranges of their travel were smaller than the whole contributed rookery range,but *** haplotype diversity of these turtles is high,and CmP19 stands out as both the most frequent and the most diverse haplotype in terms of swimming *** results indicate that the South China Sea is likely an important transportation hub and mating spot for green *** findings provided evidence for the rehabilitation of these green turtles in the wild and illustrated the complexity of movement during the green turtle’s life history,and the“mixed backgrounds”of the green turtles also highlight the need for joint conservation efforts of neighbouring countries in the South China Sea.

关键词： conservation genetics green sea turtle(Chelonia mydas) movement rookery satellite tracking