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Anomalous metastable hcp Ni nanocatalyst induced by non-metal N doping enables promoted ammonia borane dehydrogenation 被引量:1
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作者 Ping Li Yuqi Huang +3 位作者 Quhua Huang Ran Chen Jixin Li Shuanghong Tian 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2023年第4期72-82,共11页
Developing high-performing non-noble transition metal catalysts for H_(2) evolution from chemical hydrogen storage materials is of great significance for the hydrogen economy system, yet challenging. Herein,we present... Developing high-performing non-noble transition metal catalysts for H_(2) evolution from chemical hydrogen storage materials is of great significance for the hydrogen economy system, yet challenging. Herein,we present for the first time that anomalous metastable hexagonal close-packed Ni nanoparticles induced by heteroatom N doping encapsulated in carbon(N-hcp-Ni/C) can exhibit admirable catalytic performance for ammonia borane(AB) dehydrogenation, prominently outperforming conventional fcc Ni counterpart with similar morphology and favorably presenting the state-of-the-art level.Comprehensive experimental and theoretical studies unravel that unusual hcp phase engineering of Ni together with N doping could induce charge redistribution and modulate electronic structure, thereby facilitating H_(2)O adsorption and expediting H_(2)O dissociation(rate-determining step). As a result, AB dehydrogenation can be substantially boosted with the assistance of N-hcp-Ni/C. Our proposed strategy highlights that unconventional crystal phase engineering coupled with non-metal heteroatom doping is a promising avenue to construct advanced transition metal catalysts for future renewable energy technologies. 展开更多
关键词 Hcp Ni non-metal doping Phase engineering Electronic regulation Ammonia borane dehydrogenation
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Recent advances in non-metal doped titania for solar-driven photocatalytic/photoelectrochemical water-splitting 被引量:7
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作者 Ying-Ying Wang Yan-Xin Chen +4 位作者 Tarek Barakat Yu-Jia Zeng Jing Liu Stéphane Siffert Bao-Lian Su 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2022年第3期529-559,I0015,共32页
Photocatalytic (PC) / Photoelectrochemical (PEC) water splitting under solar light irradiation is considered as a prospective technique to support the sustainable and renewable H_(2) economy and to reach the ultime go... Photocatalytic (PC) / Photoelectrochemical (PEC) water splitting under solar light irradiation is considered as a prospective technique to support the sustainable and renewable H_(2) economy and to reach the ultime goal of carbon neutral. TiO_(2) based photocatalysts with high chemical stability and excellent photocatalytic properties have great potential for solar-to-H_(2) conversion. To conquer the challenges of the large band-gap and rapid recombination of photo generated electron-holepairs in TiO_(2), non-metal doping turns out to be economic, facile, and effective on boosting the visible light activity. The localized defect states such as oxygen vacancy and Ti^(3+) generated by non-metal doping are located in the band-gap of TiO_(2), which result in the reduction of band-gap, thus a red-shift of the absorption edge. The hetero doping atoms such as B^(3+), I^(7+), S^(4+)/S^(6+), P^(5+) can also act as electron donors or trap sites which facilitate the charge carrier separation and suppress the recombination of electron-hole pairs. In this comprehensive review, we present the most recent advances on non-metal doped TiO_(2) photocatalysts in terms of fundamental aspects, origin of visible light activity and the PC / PEC behaviours for water splitting. In particular, the characteristics of different non-metal elements (N, C, B, S, P, Halogens) as dopants are discussed in details focusing on the synthesis approaches, characterization as well as the efficiency of PC and PEC water splitting. The present review aims at guiding the readers who want quick access to helpful information about how to efficiently improve the performance of photocatalysts by simple doping strategies and could stimulate new intuitive into the new doping strategies. 展开更多
关键词 Photocatalytic/Photoelectrochemical water SPLITTING TItanIA non-metal doping Visible light photocatalysis
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改进的tan■-展开法和几类非线性分数阶发展方程
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作者 项芳婷 赵小山 《许昌学院学报》 CAS 2024年第2期22-28,共7页
运用改进的tan■-展开法,以一阶常系数微分方程为辅助方程,结合齐次平衡原理,研究了非线性分数阶Khokhlov-Zabolotskaya-Kuznetsov(KZK)方程、非线性分数阶foam drainage方程、非线性分数阶Jimbo-Miwa(JM)方程.借助符号计算系统Maple,... 运用改进的tan■-展开法,以一阶常系数微分方程为辅助方程,结合齐次平衡原理,研究了非线性分数阶Khokhlov-Zabolotskaya-Kuznetsov(KZK)方程、非线性分数阶foam drainage方程、非线性分数阶Jimbo-Miwa(JM)方程.借助符号计算系统Maple,求出了方程的多种精确解,这些解包括周期解、孤子解、有理函数解、指数函数解,扩大了解的范围. 展开更多
关键词 改进的tan■-展开法 非线性分数阶发展方程 精确解
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Supplementation of Lycium barbarum residue increases the growth rate of Tan sheep by enhancing their feed intake and regulating their rumen microbiome and metabolome
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作者 Yajun Zhang Xiao Chang +5 位作者 Bing Wang Dawei Wei Rongzhen Zhong Yansheng Guo Min Du Guijie Zhang 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2024年第9期3129-3144,共16页
Lycium barbarum residue(LBR),a by-product of L.barbarum processing,is packed with bioactive components and can be potentially utilized as a feed additive in animal husbandry.However,the fundamental understanding of it... Lycium barbarum residue(LBR),a by-product of L.barbarum processing,is packed with bioactive components and can be potentially utilized as a feed additive in animal husbandry.However,the fundamental understanding of its effectiveness on livestock animals is still lacking,particularly in ruminants.To explore the effects of LBR on the growth performance,rumen fermentation parameters,ruminal microbes and metabolites of Tan sheep,sixteen fattening rams(aged 4 mon)were fed a basal diet(CON,n=8)or a basal diet supplemented with 5%LBR(LBR,n=8).The experiment lasted for 70 d,with 10 d adaptation period and 60 d treatment period.The results showed that the LBR enhanced the average daily feed intake,average daily gain(P<0.05),and ruminal total volatile fatty acids(P<0.01)while decreasing ammonia-nitrogen concentration and rumen pH value(P<0.05).Additionally,the LBR improved the relative abundances of Prevotella,Succiniclasticum,Ruminococcus,Coprococcus,Selenomonas,and Butyrivibrio(P<0.05)and reduced the relative abundances of Oscillospira and Succinivibrio(P<0.05).The LBR altered the ruminal metabolome(P<0.01)by increasing the abundances of ruminal metabolites involved in amino acids(e.g.,L-proline,L-phenylalanine,L-lysine,and L-tyrosine),pyrimidine metabolism(e.g.,uridine,uracil,and thymidine),and microbial protein synthesis(e.g.,xanthine and hypoxanthine).In conclusion,LBR had positive effects on the growth rate of Tan sheep as well as on rumen fermentation parameters,rumen microbiome and rumen metabolome. 展开更多
关键词 Lycium barbarum residue rumen microbiome metabolomics growth performance tan sheep
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AiTAN与涂鸦智能达成合作,加速构建东南亚智慧商业生态
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作者 《五金科技》 2024年第1期47-48,共2页
1月27日,泰国领先的智慧解决方案提供商AiTAN与涂鸦智能在AiTAN品牌发布会上宣布达成合作。双方将联合打造AiTAN品牌在全屋&地产、酒店、租住、商照、办公等领域的全新智慧解决方案,为东南亚客户及用户带来更舒心的智慧体验。
关键词 涂鸦 提供商 智能 品牌 东南亚 发布会 tan 地产
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结肠癌组织中THBS2、SLC11A1基因表达及与TANs浸润的关系
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作者 侯建彬 李新宇 +2 位作者 陈琦玮 柳燕 贾静 《基层医学论坛》 2023年第19期16-19,共4页
目的分析结肠癌组织中血小板反应蛋白2(THBS2)溶质载体家族11成员1(SLC11A1)表达及与肿瘤相关性中性粒细胞(TANs)浸润的关系。方法选取2020年1月-2022年4月在泉州市第一医院进行手术切除的120例结肠癌患者的肿瘤组织及癌旁组织,用免疫... 目的分析结肠癌组织中血小板反应蛋白2(THBS2)溶质载体家族11成员1(SLC11A1)表达及与肿瘤相关性中性粒细胞(TANs)浸润的关系。方法选取2020年1月-2022年4月在泉州市第一医院进行手术切除的120例结肠癌患者的肿瘤组织及癌旁组织,用免疫组化法检测结肠癌组织及癌旁组织中THBS2、SLC11A1表达,收集患者临床病理特征,分析THBS2、SLC11A1表达与结肠癌患者临床病理特征的关系,分析THBS2、SLC11A1与TANs浸润密度的相关性。结果THBS2在结肠癌组织中主要表达于细胞质,SLC11A1在结肠癌组织中主要表达于细胞膜中,染色均呈现棕黄色;相较于癌旁正常组织,结肠癌组织中THBS2表达明显降低,SLC11A1表达明显升高。结肠癌组织THBS2表达与分化程度、淋巴结转移、TNM分期、血管浸润具有明显相关性(P<0.05);结肠癌组织SLC11A1表达与淋巴结转移、肿瘤浸润深度、病理分型、TNM分期、血管浸润具有明显相关性(P<0.05)。结肠癌组织中THBS2表达与TANs浸润密度呈负相关(r=-0.444,P<0.05),SLC11A1表达与TANs浸润密度呈正相关(r=0.355,P<0.05)。结论在结肠癌组织中THBS2、SLC11A1均呈现异常表达,与TANs浸润相互作用共同促进结肠癌的恶性进程,推测两指标可作为潜在的结肠癌临床预后因子。 展开更多
关键词 结肠癌 THBS2 SLC11A1 tans浸润 相关性
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Synthesis and study of MPNS/SMA nano-composite tanning agent 被引量:4
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作者 Hui Pan Mei Qi Zhi Jun Zhang 《Chinese Chemical Letters》 SCIE CAS CSCD 2008年第4期435-437,共3页
The radical polymerization of maleic anhydride(MA),styrene(ST)with the vinyl groups introduced onto the surface of the nano-sized silica via solution polymerization method was developed.The methacryloxypropyl nano... The radical polymerization of maleic anhydride(MA),styrene(ST)with the vinyl groups introduced onto the surface of the nano-sized silica via solution polymerization method was developed.The methacryloxypropyl nano-sized silica(MPNS)was used as macromonomer and polymerized with maleic anhydride and styrene by initiating with BPO in toluene.The structure and properties of MPNS/SMA nano-composite were characterized by FT-IR spectra and TEM.Meanwhile,it was applied as tanning agent compared with the traditional styrene-maleic anhydride copolymer in leather.It was found that the applied leather had better quality characteristics with the addition of the nano-sized silica. 展开更多
关键词 NANO-COMPOSITE tanning agent POLYMERIZATION LEATHER
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A Novel Approach to Clean Tanning Technology 被引量:5
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作者 Jing Li Lan Yan +1 位作者 Bi Shi Jing Zhang 《Journal of Chemistry and Chemical Engineering》 2013年第12期1203-1212,共10页
Traditional chrome tanning technology is still widely used today. In this technology, chrome shaving as well as chrome contained effluent in tanning and retanning processes is a big issue in the industry. Wet white ta... Traditional chrome tanning technology is still widely used today. In this technology, chrome shaving as well as chrome contained effluent in tanning and retanning processes is a big issue in the industry. Wet white tanning technology has been gaining in importance in recent years, but in general, the comprehensive performance of chrome-free tanned leather is not comparable with that of chrome tanned leather. In the present work, chrome-free tanning and chrome tanning are combined in a reversed procedure, which produces leather with chrome tanned leather quality without chrome tanned leather waste problems. In this procedure, a special amphoteric organic compound, no pickle, no salt chrome-free tanning agent TWT was used to tan delimed hides (no pickle) making wet white with shrinking temperature at 80-85 ~C. Then, new method called reversed tanning further process the wet white into chrome-tanned crust. In this reversed method, retanning, fatliquoring and coloring processes were carried out before chrome tanning. This technology eliminates chrome waste issue in tanning, shaving, post tanning processes. The chrome contained effluent is only concentrated in the last chrome tanning process. The leather made with this technology has complete conventional chrome-tanned leather quality. In this way, chrome leather quality without chrome waste problems was achieved. So, it is a new clean tanning technology. 展开更多
关键词 Chrome-free tanning wet-white reversed tanning process chrome tanning post tanning.
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Mechanism of Chrome-free Tanning with Tetra-hydroxymethyl Phosphonium Chloride 被引量:10
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作者 邵双喜 史楷岐 +1 位作者 蒋岚 马淳安 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2008年第3期446-450,共5页
Tetra-hydroxymethyl phosphonium chloride (THPC) has been considered as an important chrome-free tanning agent. To understand the THPC tanning mechanism, the structure, charge distribution, activity and tanning abili... Tetra-hydroxymethyl phosphonium chloride (THPC) has been considered as an important chrome-free tanning agent. To understand the THPC tanning mechanism, the structure, charge distribution, activity and tanning ability of each phosphorous compound in THPC tanning system were studied, by ^31p NMR, FT-IR spectroscopy, differential scanning calorimetry (DSC) and computational chemistry method, etc. When pH raised to 6.0, the decomposition of THPC would take place, which results in a production of free formaldehyde, tri-hydroxymethyl phosphonium (TrHP) and tri-hydroxymethyl phosphine oxide (TrHPO). At pH 9.0, THPC will be converted completely to TrHP and most TrHP is further oxidized into TrHPO. It is possible that, in reaction of phosphorous compounds and collagens, both P-C and C-O bonds would break simultaneously or individually. From molecular charge distribution and bond polar properties, it is deduced that, if P-C bonds break, the activity is in order of TrHPO 〉 THPC 〉 TrHE whereas if C--O bonds break, the order is TrHP 〉 THPC 〉 TrHPO. It is more possible that P--C bonds will break in reaction with collagen, and TrHPO may be more active in the THPC tanning system. The results of tanning and DSC also prove the above conclusion. Furthermore, the fact that the shrinkage temperature of THPC tanned leather was below 70℃ when basified to pH 5.0 or lower suggests that the hydroxymethyl groups of THPC and TrHP are less possible to combine directly with amino groups of collagen. 展开更多
关键词 tetra-hydroxymethyl phosphonium chloride chrome-free tannage green chemicals charge distribution tanning mechanism
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基于TAN网络的地铁区间与车站施工事故致因分析 被引量:3
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作者 申建红 刘树鹏 《隧道建设(中英文)》 CSCD 北大核心 2023年第1期27-35,共9页
为解决不同类型的地铁施工事故关键致因识别,以便于支持事故相关方在风险分析、预防和控制进行决策的问题。在收集国内2011—2021年间发生的202起事故报告数据的基础上,采用树增强朴素贝叶斯(tree augmented naive, TAN)和EM算法,从事... 为解决不同类型的地铁施工事故关键致因识别,以便于支持事故相关方在风险分析、预防和控制进行决策的问题。在收集国内2011—2021年间发生的202起事故报告数据的基础上,采用树增强朴素贝叶斯(tree augmented naive, TAN)和EM算法,从事故经过、直接原因、间接原因3个角度分别对事故报告进行统计处理、风险指标提取及合并、风险指标筛选、模型图形结构构建、模型参数确定,并采用GENIE软件训练数据建立最终分析模型。贝叶斯模型分析结果表明:1)通过正向推理明确不同类型事故的关键致险因素,并对各风险因素引发事故的总体影响程度进行重要度排序;2)通过反向诊断说明所建模型在不同风险因素组合情境下对风险预测的决策支持作用;3)10折交叉验证证实了模型的有效性。 展开更多
关键词 地铁区间 车站施工 安全事故 树增强朴素贝叶斯(tan) 致险因素
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Egg tanning improves the efficiency of CRISPR/Cas9-mediated mutant locust production by enhancing defense ability after microinjection 被引量:1
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作者 ZHANG Ting-ting WEN Ting-mei +8 位作者 YUE Yang YAN Qiang DU Er-xia FAN San-hong Siegfried ROTH LI Sheng ZHANG Jian-zhen ZHANG Xue-yao ZHANG Min 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2021年第10期2716-2726,共11页
The mutant efficiency and hatching ratio are two key factors that significantly affect the construction of genome-modified mutant insects.In the construction of CRISPR/Cas9-mediated dsLmRNase2^(–/–)mutant locusts,we... The mutant efficiency and hatching ratio are two key factors that significantly affect the construction of genome-modified mutant insects.In the construction of CRISPR/Cas9-mediated dsLmRNase2^(–/–)mutant locusts,we found that the tanned eggs which experienced a 20-min contact with the oocyst exhibited a higher success rate compared to fresh newly-laid eggs that were less tanned.However,the heritable efficiency of the dsLmRNase2 deletion to the next generation G_(1 )progeny was similar between adults derived from the tanned or less tanned engineered eggs.Further,the similar effective mutant ratios in the normally developed eggs and G_(0) adults of tanned and less tanned eggs also indicated that tanning did not reduce the absolute mutation efficiency induced by CRISPR/Cas9.Moreover,we found that the syncytial division period,which was longer than the time for tanning,conferred a window period for microinjection treatment with efficient mutation in both tanned and less tanned eggs.We further found that tanned eggs exhibited a higher hatching rate due to a reduced infection rate following microinjection.Both the anti-pressure and ultrastructure analyses indicated that the tanned eggs contained compressed eggshells to withstand increased external pressure.In summary,tanned eggs possess stronger defense responses and higher efficiency of genome editing,providing an improved model for developing Cas9-mediated gene editing procedures in locusts. 展开更多
关键词 brown tanned eggs CRISPR/Cas9 mutant locusts MICROINJECTION defense ability
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Diatomaceous silica filter aid filtration for the effective separation of colloidal Cr(OH)_3 precipitate from tanning wastewater
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作者 Zhao Youcai Xi Diming Chen Shaowei(School of Environrnental Engineering , Tongji University, Shanghai 200092 , China) 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 1995年第2期151-156,共6页
DiatomaceoussilicafilteraidfiltrationfortheeffectiveseparationofcolloidalCr(OH)_3precipitatefromtanningwaste... DiatomaceoussilicafilteraidfiltrationfortheeffectiveseparationofcolloidalCr(OH)_3precipitatefromtanningwastewaterZhaoYoucai;X... 展开更多
关键词 diatornaceous silica filter acid filtration tanning wastewater colloidal Cr(OH)_3 precipitate.
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Modelling and Dynamic Characteristics for a Non-metal Pressurized Reservoir with Variable Volume
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作者 Pei Wang Jing Yao +2 位作者 Baidong Feng Mandi Li Dingyu Wang 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2022年第2期159-173,共15页
With the increasing demand to reduce emissions and save energy,hydraulic reservoirs require new architecture to optimize their weight,space,and volume.Conventional open reservoirs are large,heavy,and easily polluted,a... With the increasing demand to reduce emissions and save energy,hydraulic reservoirs require new architecture to optimize their weight,space,and volume.Conventional open reservoirs are large,heavy,and easily polluted,and threaten the operation of hydraulic systems.A closed reservoir provides the advantages of small volume and light weight,compared to open reservoirs.In this study,a non-metallic pressure reservoir with variable volume is designed and manufactured for closed-circuit hydraulic systems.The reservoir housing is made of rubber,and the Mooney-Rivlin model is chosen based on the rubber strain properties.The FEA simulation for the reservoir is performed using ANSYS Workbench to obtain the structural stiffness.The major contribution is the establishment of mathematical models for this reservoir,including the volume equation changing with height,flow equation,and force balance equation,to explore the output characteristics of this reservoir.Based on these results,simulation models were built to analyze the output characteristics of the reservoir.Moreover,the test rig of a conventional hydraulic system was transformed into a closed-circuit asymmetric hydraulic system for the reservoir,and preliminary verification experiments were conducted on it.The results demonstrate that the designed reservoir can absorb and discharge oil and supercharge pump inlet to benefit system operation.The changes in the volume and pressure with displacements under different volume ratios and frequencies were obtained,which verified the accuracy of the mathematical models.Owing to its lightweight design and small volume,the reservoir can replace conventional open reservoirs,and this lays a foundation for future theoretical research on this reservoir. 展开更多
关键词 Hydraulic reservoir Variable volume Pressure reservoir non-metal LIGHTWEIGHT
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过渡金属掺杂TaN硬质涂层的力学性能和电子结构的第一性原理研究
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作者 代唯可 汪炯 《粉末冶金材料科学与工程》 2023年第3期203-211,共9页
通过第一性原理计算,研究过渡金属(transition metal,TM)元素掺杂氮化钽(Ta7TMN8,TM=Ti、V、Cr、Y、Zr和Hf)的结构稳定性、力学性能和电子结构。根据对结构和稳定性的计算结果可知,所有的掺杂化合物均能量稳定,Ta7TiN8在能量上比其他掺... 通过第一性原理计算,研究过渡金属(transition metal,TM)元素掺杂氮化钽(Ta7TMN8,TM=Ti、V、Cr、Y、Zr和Hf)的结构稳定性、力学性能和电子结构。根据对结构和稳定性的计算结果可知,所有的掺杂化合物均能量稳定,Ta7TiN8在能量上比其他掺杂化合物更有利;Y、Zr和Hf的掺入使得TaN晶格和体积膨胀,而Ti、V和Cr则相反。通过对力学性能的计算可知,Ti和V的掺入对TaN的剪切模量、弹性模量和理论硬度有较明显的提升,掺Cr对TaN的体积模量有一定的提升,但是会大幅降低理论硬度。基于Ta7TMN8总态密度和分态密度计算结果,费米能级附近存在态密度,表明所有化合物都具有金属性质,由于Ti-3d、V-3d和Cr-3d轨道在费米能级上的贡献比其他TM原子大得多,使得Ta7TiN8、Ta7VN8和Ta7CrN8具有更高的金属性。 展开更多
关键词 tan硬质涂层 掺杂 第一性原理计算 力学性能 电子结构
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Enhancing visible-light photocatalytic activity of α-Bi_2O_3 via non-metal N and S doping
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作者 尚军 高远 +5 位作者 郝维昌 井溪 信会菊 王亮 冯海凤 王天民 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第3期560-565,共6页
In recent years, some important research indicated that the visible-light activity of photocatalysts could be enhanced via incorporating p-block non-metal elements into the lattice. In this paper, we investigated the ... In recent years, some important research indicated that the visible-light activity of photocatalysts could be enhanced via incorporating p-block non-metal elements into the lattice. In this paper, we investigated the electronic structures of pure and different non-metal (C, N, S, F, Cl, and Br) doped α-Bi2O3 using first-principles calculations based on the density functional theory. The band structures, the electronic densities of states, and the effective masses of electrons and holes for doped α-Bi2O3 were obtained and analyzed. The N and S dopings narrowed the band gap and reduced the effective mass of the carriers, which are beneficial for the photocatalytic performance. The theoretical predication was further confirmed by the experimental results. 展开更多
关键词 α-Bi2O3 first-principles calculation non-metal doping photocatalytic performance
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Indoor tanning bed use and risk of food addiction based on the modified Yale Food Addiction Scale
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作者 Wen-Qing Li John E.McGeary +6 位作者 Eunyoung Cho Alan Flint Shaowei Wu Alberto Ascherio Eric Rimm Alison Field Abrar A.Qureshi 《The Journal of Biomedical Research》 CAS CSCD 2017年第1期31-39,共9页
The popularity of indoor tanning may be partly attributed to the addictive characteristics of tanning for some individuals.We aimed to determine the association between frequent indoor tanning,which we view as a sunog... The popularity of indoor tanning may be partly attributed to the addictive characteristics of tanning for some individuals.We aimed to determine the association between frequent indoor tanning,which we view as a sunogate for tanning addiction,and food addiction.A total of 67,910 women were included from the Nurses' Health Study II.In2005,we collected information on indoor tanning during high school/college and age 25-35 years,and calculated the average use of indoor tanning during these periods.Food addiction was defined as ≥3 clinically significant symptoms plus clinically significant impairment or distress,assessed in 2009 using a modified version of the Yale Food Addiction Scale.Totally 23.3%(15,822) of the participants reported indoor tanning at high school/college or age 25-35 years.A total of 5,557(8.2%) women met the criteria for food addiction.We observed a dose-response relationship between frequency of indoor tanning and the likelihood of food addiction(P_(trend)〈 0.0001),independent of depression,BMI,and other confounders.Compared with never indoor tanners,the odds ratio(95%confidence interval) of food addiction was 1.07(0.99-1.17) for average indoor tanning 1-2 times/year,1.25(1.09-1.43) for 3-5times/year,1.34(1.14-1.56) for 6-11 times/year,1.61(1.35-1.91) for 12-23 times/year,and 2.98(1.95-4.57) for 24 or more times/year.Frequent indoor tanning before or at early adulthood is associated with prevalence of food addiction at middle age.Our data support the addictive property of frequent indoor tanning,which may guide intervention strategies to curb indoor tanning and prevent skin cancer. 展开更多
关键词 indoor tanning food addiction cohort study skin cancer epidemiology UV radiation
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Eco-friendly Leather: Chromium Reduction in the Tanning Cycle
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作者 Elena Salernitano Alessandra Strafella +1 位作者 Mercedes Roig Alice Dall'Ara 《Journal of Environmental Science and Engineering(A)》 2017年第8期402-409,共8页
The leather manufacturing is traditionally responsible for high environmental pollution. Tannery effluent contains, indeed, large amounts of lime sludge, sulfides, acids, toxic metals salts, in particular chromium sal... The leather manufacturing is traditionally responsible for high environmental pollution. Tannery effluent contains, indeed, large amounts of lime sludge, sulfides, acids, toxic metals salts, in particular chromium salts, which are toxic, non-biodegradable and hardly disposable. For this reason, great research efforts are addressed to establish a significantly eco-sustainable and convenient business for companies and to produce high quality leather products. The replacement of current commercial chemical and toxic products with innovative natural/naturalized products and technologies in some crucial phases of the tanning cycle (mainly bating and defatting), can induce an eco-friendly reduction of the needed chromium amount. Leather samples, treated with innovative bating and defatting products and tanned by several different Cr contents, were characterized by SEM-EDS (Scanning Electron Microscopy equipped with Energy Dispersive X-Ray Spectroscopy) and TGA (Thermogravimetric Analysis). SEM-EDS was used to observe the surface and cross-section morphology and to provide a semi-quantitative elemental analysis, while TGA to evaluate the thermal stability and decomposition phases. The compatibility of the innovative products was demonstrated and the environmental impact of the process, performed by the effluents characterization, was effectively improved as a result of a 20% Cr lowering. The use of innovative products and the chromium reduction did not affect the thermal stability, leather morphology and not involve significant differences in the composition. 展开更多
关键词 Leather manufacturing tanning cycle Cr reduction natural/naturalized products.
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Tanning Industry in Xinji City
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《China's Foreign Trade》 1995年第3期46-46,共1页
Xinji City, in the middle south of Hebei Province, has a tanning history of more than 400 years. The city boasted over 100 kinds of fur and leather products, over 300 workshops and shops and 24 foreign agencies in the... Xinji City, in the middle south of Hebei Province, has a tanning history of more than 400 years. The city boasted over 100 kinds of fur and leather products, over 300 workshops and shops and 24 foreign agencies in the early years of the Qing Dynasty (1644-1911). Since 1949, especially since 1981,the city’s tanning industry has witnessed a big leap. There are around 10, 000 tanning enterprises in the city with an annual industrial value of RMB 1.3 billion and an annual export value of US $ 展开更多
关键词 THAN tanning Industry in Xinji City
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A High Throughput Screening Platform for Skin Tuning Properties from Natural Products: Identification of Skin Tanning Compounds
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作者 Gallant K. L. Chan Kevin Q. Wu +5 位作者 Zack C. F. Wong Aster H. Y. Fung Xuyan Lin Lucy J. Lou Tina T. Dong Karl W. K. Tsim 《Journal of Cosmetics, Dermatological Sciences and Applications》 2016年第5期199-209,共12页
Skin lightening and tanning are two major areas dominating the market of skincare and cosmetic products. Though the demands are originated from two different communities, the two areas share a same goal—skin colour t... Skin lightening and tanning are two major areas dominating the market of skincare and cosmetic products. Though the demands are originated from two different communities, the two areas share a same goal—skin colour tuning. The known safe compounds with skin colour tuning activities are limited. In contrary, Chinese medicinal herb provides a pool of natural bioactive compounds, which have been used in Asian countries for long time and have been tested for its toxicity. Here, we demonstrate a high throughput screening platform for potential compounds usable for skin colour tuning. From 147 natural compounds, 26 of them showed potential in skin tanning functions by using the high throughput melanogenesis platform based on the melanogenesis assay on B16 melanocytes. Five of them promoted melanogenesis by over 50%. Moreover, apart from 1, 8-dihydroxyanthraquinone, the other four compounds showed enhancement effect on tyrosinase activity. From the result, the compounds increased the Vmax of tyrosinase without changing the Km in a dose-dependent manner. Thus, there should be no irreversible structural change of the enzyme. Definitely, this report contributes to the development of personalization in skincare and cosmetic products. 展开更多
关键词 Skin Lightening Skin tanning High-Throughput Platform MELANOGENESIS PERSONALIZATION Skincare and Cosmetic Products
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tan(φ(ξ)/2)-展开法和(2+1)维非线性立方Klein-Gordon方程
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作者 项芳婷 赵小山 《江西科学》 2023年第3期436-439,共4页
运用tan(φ(ξ)/2)-展开法并借助符合计算系统Maple,求出了(2+1)维非线性立方Klein-Gordon方程的多种精确解,这些解包括周期解、孤子解、指数函数解。
关键词 tan(φ(ξ)/2)-展开法 (2+1)维非线性立方Klein-Gordon方程 符号计算
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