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Preparation of nZVI embedded modified mesoporous carbon for catalytic persulfate to degradation of reactive black 5

Frontiers of Environmental Science & Engineering 2021年第5期15卷 237-246页

作者： zhifei Ma Huali Cao Fengchun Lv yu Yang Chen Chen Tianxue Yang Haixin Zheng Daishe Wu Key Laboratory of Poyang Lake Environment and Resource Utilization(Ministry of Education) School of Resources Environmental&Chemical EngineeringNanchang UniversityNanchang330031China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing100012China

High-efficiency and cost-effective catalysts with available strategies for persulfate(PS)activation are critical for the complete mineralization of organic contaminants in the environmental remediation and protection fields.A nanoscale zero-valent iron-embedded modified mesoporous carbon(MCNZVI)with a core-shell structure is synthesized using the hydrothermal synthesis method and high-temperature *** results showed that nZVI could be impregnated within mesoporous carbon frameworks with a comparatively high graphitization degree,rich nitrogen doping content,and a large surface area and pore *** material was used as a persulfate activator for the oxidation removal of Reactive Black 5(RB5).The effects of the material dosage,PS concentration,pH,and some inorganic anions(i.e.,Cl^(−),SO_(4)^(2−))on RB5 degradation were then *** highest degradation efficiency(97.3%)of RB5 was achieved via PS(20 mmol/L)activation by the MCNZVI(0.5 g/L).The pseudo-first-order kinetics(k=2.11×10^(−2)min^(−1))in the MCNZVI/PS(0.5 g/L,20 mmol/L)was greater than 100 times than that in the MCNZVI and *** reactive oxygen species(ROS),including^(1)O_(2),SO_(4)^(·−),HO^(.),and·O_(2)^(−),were generated by PS activation with the *** oxygen was demonstrated to be the primary ROS responsible for the RB5 *** MCNZVI could be reused and regenerated for *** work provides new insights into PS activation to remove organic contamination.

关键词： MCNZVI Core-shell structure Reactive Black 5 Persulfate Mechanism

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发泡法与自体表皮细胞移植治疗面颈部白癜风美学效果的比较研究

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中华医学美学美容杂志 2024年第3期30卷 208-212页

作者：陶勇刘志飞张明子胡晓函俞楠泽龙飞夏泽楠莫斓王晓军南京华厦白癜风医院南京210028 中国医学科学院北京协和医院整形外科北京100140 河北医科大学19级基础医学院临床医学系石家庄050011

目的探讨发泡法移植技术与非培养自体表皮细胞移植再生技术在面颈部稳定期白癜风外科治疗的差异与美学意义。方法2016年5月至2020年5月,北京协和医院整形美容外科与南京华厦白癜风医院治疗面颈部稳定期白癜风患者64例,男25例、女39例;年... 详细信息

目的探讨发泡法移植技术与非培养自体表皮细胞移植再生技术在面颈部稳定期白癜风外科治疗的差异与美学意义。方法2016年5月至2020年5月,北京协和医院整形美容外科与南京华厦白癜风医院治疗面颈部稳定期白癜风患者64例,男25例、女39例;年龄10~46岁,平均25岁。随机数字表法分为发泡法移植组和自体表皮移植组,每组32例;分别于术后3个月和6个月计算两组患者的治疗有效率、色素沉着、拼缝畸形出现情况。结果发泡法移植组:治疗后3个月有效22例(68.75%),6个月有效29例(90.63%);自体表皮移植组:治疗后3个月有效19例(59.37%),6个月有效28例(87.50%);两组比较差异无统计学意义(P>0.05)。自体表皮移植组在术后3个月及6个月未出现色素沉着及拼缝畸形患者,效果优于发泡法移植组。结论非培养自体表皮细胞移植再生技术治疗白癜风更符合患者的美学需求。

关键词：白癜风发泡法移植技术非培养自体表皮细胞移植再生技术美学有效率

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协同利用提锌二次窑渣和疏浚泥制备陶瓷的工艺优化

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钢铁研究学报 2023年第2期35卷 210-218页

作者：王治飞李宇北京科技大学钢铁冶金新技术国家重点实验室北京100083

针对沿海钢铁产业聚集区冶金粉尘提锌后排放的大量二次窑渣以及港口河道等疏浚过程排出大量疏浚泥难以利用的现状,根据窑渣高铁高钙和疏浚泥高硅高铝的组分特点,协同利用二次窑渣和疏浚泥制备建筑陶瓷,并采用X射线衍射分析、傅里叶变换... 详细信息

针对沿海钢铁产业聚集区冶金粉尘提锌后排放的大量二次窑渣以及港口河道等疏浚过程排出大量疏浚泥难以利用的现状,根据窑渣高铁高钙和疏浚泥高硅高铝的组分特点,协同利用二次窑渣和疏浚泥制备建筑陶瓷,并采用X射线衍射分析、傅里叶变换红外光谱、扫描电子显微镜和电感耦合等离子体质谱仪测定不同组成(窑渣和疏浚泥比例从60∶40增加到80∶20)和不同工艺条件制备陶瓷样品的矿物组成、微观结构和重金属浸出浓度等性能。研究结果表明:在最佳烧成条件下(窑渣∶疏浚泥质量比为70∶30,焙烧温度为1 180℃,焙烧时间为40 min,预热温度为500℃,预热时间为10 min)烧制陶瓷的性能优良,其中,抗折强度为85 MPa, 1 h吸水率为0.15%,表观密度为2 180 kg/m3,陶瓷中Cr、Mn、Ni、Cu、Zn和As等重金属元素的浸出结果满足国家标准要求。该窑渣-疏浚泥陶瓷的主要矿物为普通辉石相,其次是赤铁矿,其中辉石相粒径为2~5μm且大量均匀析出,有利于提高其力学性能。陶瓷在致密化过程产生了液相烧结,这使得整体结构致密,吸水率低,有利于对重金属元素的固结。

关键词：窑渣陶瓷烧结条件辉石赤铁矿

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定位装置对头面部医学摄影一致性的影响

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中国美容医学 2024年第4期33卷 33-37页

作者：高景李竹君俞楠泽曹海茹李子榕郑姣洁陈洁孙琦佟洋刘志飞中国医学科学院北京协和医院整形美容外科北京100032

目的:探讨定位装置对整形美容外科头面部医学摄影一致性的影响。方法:于2021年3月,选取志愿者20例作为研究对象,采用自身对照研究法,每位志愿者先使用传统拍摄法拍摄三组照片,每组照片拍摄角度为左、右45°和左、右90°;30 min后,每位... 详细信息

目的:探讨定位装置对整形美容外科头面部医学摄影一致性的影响。方法:于2021年3月,选取志愿者20例作为研究对象,采用自身对照研究法,每位志愿者先使用传统拍摄法拍摄三组照片,每组照片拍摄角度为左、右45°和左、右90°;30 min后,每位志愿者再使用定位装置拍摄法拍摄三组照片,记录每组拍摄时间。通过Image J软件对每组照片进行距离及角度的测量,对两种拍摄方法测量数据的差值及所用时间进行统计学分析。结果:定位装置拍摄法中左、右45°照的角度差,左、右90°照的角度差,以及左、右45°照的距离差均小于传统拍摄法,拍摄时间也明显短于传统拍摄法(P<0.05)。结论:摄影定位装置的运用,大大提升了整形美容外科头面部医学摄影的一致性,使影像资料更加标准、规范,还缩短了拍照时间,提升了工作效率,提高医、护、患三方满意度。

关键词：定位装置整形美容头面部医学摄影一致性

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Gas chromatography-mass spectrometry analysis of essential oils from five parts of Chaihu(Radix Bupleuri Chinensis)

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Journal of Traditional Chinese Medicine 2014年第6期34卷 741-748页

作者： Jie Meng Xingfu Chen Wenyu Yang Jiuhua Song yu Zhang zhifei Li Xingwang Yang Zhanguo Yang Department of Pharmaceutical Botany College of Agronomy Sichuan Agricultural University Key Laboratory of Crop Physiology Ecology and Cultivation inSouthwest Ministry of Agriculture Production Division Sichuan Depeiyuan Traditional Chinese Medicine Technology Development Co. Ltd.

OBJECTIVE: To analyze the essential oils from flowers, leaves, stems, roots, and fruits of Chaihu(Radix Bupleuri Chinensis).METHODS: We extracted essential oils from different parts of Chaihu(Radix Bupleuri Chinensis) using a steam distillation method. The essential oils were analyzed by gas chromatography-mass spectrometry(GC-MS). Data were collected in full scan mode(m/z 60-600). Volatile components were identified based on their retention indices and by comparing their mass spectra with those in the National Institute of Standards and Technology 2005 database assisted by tandem mass spectrometry information. The relative content of each constituent wasdetermined by area ***: We identified 111 components, of which12 were common to all 5 parts, 30 were found only in roots, 14 were found only in flowers, 6 were found only in leaves, 4 were found only in stems,and 17 were found only in ***: Our results show that the stems,flowers, leaves, and fruits of Chaihu(Radix Bupleuri Chinensis)contain a high concentration of essential oils, and that the exact composition of the essential oils differs among the plant parts. To develop new medicines and make full use of the Chaihu(Radix Bupleuri Chinensis)resource, it is important to characterize the essential oils from different parts of the plant. In future research, it will be important to determine the pharmacological effects of the various components and the essential oil mixtures.

关键词：气相色谱质谱图柴胡精油羊草光谱分析水蒸气蒸馏法美国国家标准

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人二倍体细胞乙型脑炎灭活疫苗毒种的质量评价

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药物分析杂志 2024年第3期44卷 542-546页

作者：徐宏山沈慧莉付瑞刘欣玉李玉华叶强中国食品药品检定研究院北京102629 安徽智飞龙科马生物制药有限公司合肥230088

目的:对人二倍体细胞(ZFB-3)乙型脑炎灭活疫苗毒种进行质量评价。方法:通过鉴别试验对毒种进行鉴别,以鉴别是否为乙脑病毒;通过脑内滴定法对毒种进行病毒滴度检测,以评估其在人二倍体细胞(ZFB-3)上的适应性和增殖能力;对毒种进行无菌检... 详细信息

目的:对人二倍体细胞(ZFB-3)乙型脑炎灭活疫苗毒种进行质量评价。方法:通过鉴别试验对毒种进行鉴别,以鉴别是否为乙脑病毒;通过脑内滴定法对毒种进行病毒滴度检测,以评估其在人二倍体细胞(ZFB-3)上的适应性和增殖能力;对毒种进行无菌检查、支原体检查、外源病毒因子检查,以检测是否有外源性污染。结果:证明毒种为乙脑病毒,且具有较高的病毒滴度,在人二倍体细胞(ZFB-3)上已较好地适应,且无细菌、真菌、支原体、外源病毒因子污染。结论:人二倍体细胞(ZFB-3)乙型脑炎灭活疫苗毒种质量符合要求,可应用于疫苗的生产。

关键词：乙型脑炎病毒灭活疫苗人二倍体细胞毒种质量评价

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焦麦芽烤甜香关键成分的确定及制备工艺优化

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中国烟草科学 2016年第5期37卷 68-74页

作者：杨鹏元洪广峰马宇平蔡莉莉陈芝飞于建春王丁众马骥杨伟平刘俊辉卢斌斌张文娟北方民族大学材料科学与工程学院银川750021 郑州大学材料科学与工程学院郑州450001 中国烟草总公司郑州烟草研究院郑州450001 河南中烟工业有限责任公司技术中心郑州450000

为开发能够增加卷烟烟气烤甜香香韵的烟用香料,以焦麦芽为原料,采用卷烟感官作用导向分析和气质联用(GC/MS)方法确定了焦麦芽提取物中的烤甜香关键成分,并以这些成分的含量为指标优化了焦麦芽烤甜香香料的制备工艺。结果表明,1经凝胶渗... 详细信息

为开发能够增加卷烟烟气烤甜香香韵的烟用香料,以焦麦芽为原料,采用卷烟感官作用导向分析和气质联用(GC/MS)方法确定了焦麦芽提取物中的烤甜香关键成分,并以这些成分的含量为指标优化了焦麦芽烤甜香香料的制备工艺。结果表明,1经凝胶渗透色谱(GPC)分离和感官评价确定的焦麦芽烤甜香特征组分中含有麦芽酚、4-羟基-2,5-二甲基-3(2H)-呋喃酮、甲基环戊烯醇酮等15种关键成分。2优化的加热提取工艺参数为95%乙醇、料液质量比1:6、提取温度80℃、提取时间2.0 h、提取2次;脱蜡工艺参数为回溶乙醇浓度95%、回溶液中干物质含量20%和冷冻温度-20℃。3制备的焦麦芽烤甜香特征香料中烤甜香关键成分含量明显高于市售麦芽提取物和焦麦芽粗提物,且添加该烤甜香特征香料的样品卷烟烟气烤甜香更加突出。

关键词：烟用香料焦麦芽提取物卷烟感官作用评价烤甜香香韵气谱联用(GC/MS)

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Advancing application of mesenchymal stem cell-based bone tissue regeneration

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Bioactive Materials 2021年第3期6卷 666-683页

作者： Fengqing Shang Yang yu Shiyu Liu Leiguo Ming Yongjie Zhang zhifei Zhou Jiayu Zhao Yan Jin State Key Laboratory of Military Stomatology&National Clinical Research Center for Oral Diseases&Shaanxi Key Laboratory of Oral DiseasesCenter for Tissue EngineeringFourth Military Medical UniversityXi'anShaanxi710032China Department of Stomatology The 306th Hospital of PLABeijing100101China Department of Periodontology School and Hospital of StomatologyCheeloo College of MedicineShandong University&Shandong Key Laboratory of Oral Tissue Regeneration&Shandong Engineering Laboratory for Dental Materials and Oral Tissue RegenerationJinanShandong250012China Department of Stomatology General Hospital of Tibetan Military CommandLhasa850000China Bureau of Service for Veteran Cadres of PLA in Beijing Beijing100001China

Reconstruction of bone defects,especially the critical-sized defects,with mechanical integrity to the skeleton is important for a patient's rehabilitation,however,it still remains *** biomaterials of human origin bone tissue for therapeutic purposes has provided a facilitated approach that closely mimics the critical aspects of natural bone tissue with regard to its ***,not only efficacious and safe but also costeffective and convenient are important for regenerative biomaterials to achieve clinical translation and commercial *** in our understanding of regenerative biomaterials and their roles in new bone formation potentially opened a new frontier in the fast-growing field of regenerative *** inspiration from the role and multicomponent construction of native extracellular matrix(ECM)for cell accommodation,the ECM-mimicking biomaterials and the naturally decellularized ECM scaffolds were used to create new tissues for bone *** the other hand,with the going deep in understanding of mesenchymal stem cells(MSCs),they have shown great promise to jumpstart and facilitate bone healing even in diseased microenvironments with pharmacology-based endogenous MSCs rescue/mobilization,systemic/local infusion of MSCs for cytotherapy,biomaterials-based approaches,cell-sheets/-aggregates technology and usage of subcellular vesicles of MSCs to achieve scaffolds-free or cell-free delivery system,all of them have been shown can improve MSCsmediated regeneration in preclinical studies and several clinical ***,following an overview discussed autogenous/allogenic and ECM-based bone biomaterials for reconstructive surgery and applications of MSCsmediated bone healing and tissue engineering to further offer principles and effective strategies to optimize MSCs-based bone regeneration.

关键词： Mesenchymal stem cells Bone healing Regenerative medicine Biomaterials Extracellular matrix Cytotherapy Cell-sheets/-aggregates Exosomes

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Analysis for remedial alternatives of unregulated municipal solid waste landfills leachate-contaminated groundwater

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Frontiers of Earth Science 2013年第3期7卷 310-319页

作者： Da AN Yonghai JIANG Beidou XI zhifei MA yu YANG Queping YANG Mingxiao LI Jinbao ZHANG Shunguo BAI Lei JIANG School of Environment Beijing Normal University Beijing 100875 China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing 100012 China

A groundwater flow and solute transport model was developed using Visual Modflow for forecasting contaminant transport and assessing effects of remedial alternatives based on a case study of an unregulated landfill leachate-contaminated groundwater in eastern China. The results showed that arsenic plume was to reach the pumping well in the downstream farmland after eight years, and the longest lateral and longitudinal distance of arsenic plume was to reach 200 m and 260 m, respectively. But the area of high concentration region of arsenic plume was not to obviously increase from eight years to ten years and the plume was to spread to the downstream river and the farmland region after 20 years; while the landfill＇s ground was hardened, the plume was not to reach the downstream farmland region after eight years; when the pumping well was installed in the plume downstream and discharge rate was 200m3/d, the plume was to be effectively restrained; for leakage-proof barriers, it might effectively protect the groundwater of sensitive objects within an extent time range. But for the continuous point source, the plume was still to circle the leakage-proof barrier; when discharge rate of drainage ditches was 170.26 m3/d, the plume was effectively controlled; the comprehensive method combining ground-harden with drainage ditches could get the best effect in controlling contaminant diffusion, and the discharge rate was to be reduced to 111.43 m3/d. Therefore, the comprehensive remedial alternative combining ground-harden with drainage ditch will be recommended for preventing ground-water contamination when leachate leakage has happened in unregulated landfills.

关键词： unregulated landfill groundwater numerical simulation contaminant transport arsenic remedial alternative

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Extraction of flocculants from a strain of Bacillus thuringiensis and analysis of their properties

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Aquaculture and Fisheries 2017年第4期2卷 179-184页

作者： Jingrong Wu Guangjun Wang zhifei Li Ermeng yu Jun Xie Zonglin Zheng Pearl River Fisheries Research Institute Chinese Academy of Fishery SciencesGuangzhouGuangdong 510380China Southwest University Rongchang Campus Chongqing 402460China

In a preliminary screening study,our laboratory isolated from the biofloc in aquaculture waters a strain of Bacillus thuringiensis,which produced highly efficient *** the present study,we extracted the crude flocculants from this strain and analyzed their *** analysis indicated that the flocculants were mainly distributed in the supernatant of the fermentation *** flocculants were extracted using an ethanol extraction method,and the chemical compositions and morphology of the crude flocculants were analyzed using the Molish reaction,Fehling reaction,ninhydrin reaction,biuret reaction,phenol-sulfuric acid assay,Coomassie brilliant blue staining,ultraviolet scanning,infrared scanning and scanning electron *** carbohydrate composition of the polysaccharides in the flocculants was analyzed with thin layer *** results indicated that flocculants were solid substances with an ivory white color and their texture was loose and *** under scanning electron microscopy revealed that their ultra-morphology consisted of small,long and fiber-like *** and physical analyses indicated that polysaccharides accounted for 34.5%of the components in the crude *** monosaccharides present in crude flocculants included mainly glucose,galactose and mannitose.

关键词： Bacillus thuringiensis Bio-flocculant Property analysis Polysaccharides

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