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Effects of resveratrol on the inflammatory response and renal injury in hyperuricemic rats
Xiao Benxi,Ma Wenjun,Zheng Ying,Li Zhen,Li Dan,Zhang Yanjun,Li Yuanhong,Wang Duan 한국영양학회 2021 Nutrition Research and Practice Vol.15 No.1
BACKGROUND/OBJECTIVES: Hyperuricemic nephropathy is a common cause of acute kidney injury. Resveratrol can ameliorate kidney injury, but the explicit mechanism remains unclear. We investigated the effects of resveratrol on the inflammatory response and renal injury in hyperuricemic rats. MATERIALS/METHODS: A rat model of hyperuricemic nephropathy was established by the oral administration of a mixture of adenine and potassium oxinate. Biochemical analysis and hematoxylin and eosin staining were performed to assess the rat kidney function. Enzyme-linked immunosorbent assays were performed to evaluate the immune and oxidative responses. RESULTS: The expression levels of urine albumin and β2-microglobulin were significantly decreased after resveratrol treatment. In addition, the levels of serum creatinine and uric acid were significantly decreased in the resveratrol groups, compared with the control group. The levels of proinflammatory factors, such as interleukin-1β and tumor necrosis factor-α, in kidney tissue and serum were also increased in the hyperuricemic rats, and resveratrol treatment inhibited their expression. Moreover, the total antioxidant capacity in kidney tissue as well as the superoxide dismutase and xanthine oxidase levels in serum were all decreased by resveratrol treatment. CONCLUSIONS: Resveratrol may protect against hyperuricemic nephropathy through regulating the inflammatory response.
中国地方官员的民主价值观为何会有差异? ——对1456个地方官员的问卷分析
肖唐镖 ( Xiao Tangbiao ),王艳军 ( Wang Yanjun ) 성균관대학교 성균중국연구소 2020 중국사회과학논총 Vol.2 No.1
本文从现代化程度、既得利益卷入、职业与政治规训、受教育程度与学习经历、传统权威观念等5个方面描述相关模式,分析其对地方官员民主价值观的影响。研究发现,以地区经济发展为中心的现代化程度、既得利益卷入与传统权威观念均起着消极的反作用,既得利益卷入越深、传统权威观念越重的干部,以及在经济较为发达地区的干部,其民主价值观相对薄弱; 受教育程度越高的地方官员越倾向于支持公民权利,但具有跨国交流与学习经历的地方官员则更倾向于排斥公民权利; 职业与政治规训假设未得到检验,也就是说,现部门性质和党员身份等变量并未对地方官员的民主价值观产生显著影响。 This paper demonstrates a descriptive pattern of local officials’ democratic values upon five factors – the degree of modernization, the involvement of vested interests, professional and political discipline, educational level and learning experience and the traditional-authoritarian ideas. It suggests that the degree of modernization, the involvement of vested interests, and the traditional ideas of authority are negatively correlated with democratic values. The officials who are with deeply involved interests, holding more traditional-authoritarian attitudes, and working in more economically developed areas are less likely to support democratic values. The more educated local officials were, the more likely they were to support civil rights, but the more likely they were to exclude them if they had experience of cross-border communication and learning.While no sufficient evidence supports the hypothetical role of professional and political discipline, in other words, there is no systematic evidence showing that local officials’ democratic values are differing by their department nature and party membership.
Jianping Jin,Xiao Liu,Shuai Yuan,Peng Gao,Yanjun Li,Hao Zhang,Xiangzhi Meng 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.98 No.-
Red mud and coal gangue are industrial solid wastes discharged during alumina extraction and coalmining, respectively. As these are hazardous materials, their disposal leads to serious environmentalissues. In this study, an innovative utilization of red mud through co-roasting with coal gangue forseparation and recycling of iron and aluminum minerals is presented. Under optimum co-roastingconditions (550 C for 50 min), an iron concentrate containing 57.25% TFe (total iron content) with therecovery of 65.22%, and an aluminum-rich product containing 27.26% Al2O3 with the recovery of 71.37%were obtained after magnetic separation. The characteristics of mixed raw material and products allindicated that the goethite and hematite phases in the mixed raw material were transformed into amagnetite phase after co-roasting, although some of the magnetite generated during co-roasting wasoxidized to hematite again. This study demonstrates that co-roasting of coal gangue and red mud is apromising technology for the reduction of iron and activation of aluminum to realize resource recyclingwithout additional materials
Li, Xiaopeng,Xiao, Yanjun,Bang, Jin Ho,Lausch, Dominik,Meyer, Sylke,Miclea, Paul‐,Tiberiu,Jung, Jin‐,Young,Schweizer, Stefan L.,Lee, Jung‐,Ho,Wehrspohn, Ralf B. WILEY‐VCH Verlag 2013 ADVANCED MATERIALS Vol.25 No.23
<P><B>Through metal‐assisted chemical etching (MaCE), superior purification of dirty Si is observed</B>, from 99.74 to 99.9884% for metallurgical Si and from 99.999772 to 99.999899% for upgraded metallurgical Si. In addition, large area of silicon nanowires (SiNW) are fabricated. The purification effect induces a ∼35% increase in photocurrent for SiNW based photoelectrochemical cell.</P>
Cao, Yuebin,Xiao, Yanjun,Jung, Jin-Young,Um, Han-Don,Jee, Sang-Won,Choi, Hye Mi,Bang, Jin Ho,Lee, Jung-Ho American Chemical Society 2013 ACS APPLIED MATERIALS & INTERFACES Vol.5 No.3
<P>Traditional Pt counter electrode in quantum-dot-sensitized solar cells suffers from a low electrocatalytic activity and instability due to irreversible surface adsorption of sulfur species incurred while regenerating polysulfide (S<SUB><I>n</I></SUB><SUP>2–</SUP>/S<SUP>2–</SUP>) electrolytes. To overcome such constraints, chemically synthesized Cu<SUB>2</SUB>ZnSn(S<SUB>1–<I>x</I></SUB>Se<SUB><I>x</I></SUB>)<SUB>4</SUB> nanocrystals were evaluated as an alternative to Pt. The resulting chalcogenides exhibited remarkable electrocatalytic activities for reduction of polysulfide (S<SUB><I>n</I></SUB><SUP>2-</SUP>) to sulfide (S<SUP>2–</SUP>), which were dictated by the ratios of S/Se. In this study, a quantum dot sensitized solar cell constructed with Cu<SUB>2</SUB>ZnSn(S<SUB>0.5</SUB>Se<SUB>0.5</SUB>)<SUB>4</SUB> as a counter electrode showed the highest energy conversion efficiency of 3.01%, which was even higher than that using Pt (1.24%). The compositional variations in between Cu<SUB>2</SUB>ZnSnS<SUB>4</SUB> (<I>x</I> = 0) and Cu<SUB>2</SUB>ZnSnSe<SUB>4</SUB> (<I>x</I> = 1) revealed that the solar cell performances were closely related to a difference in electrocatalytic activities for polysulfide reduction governed by the S/Se ratios.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/aamick/2013/aamick.2013.5.issue-3/am302522c/production/images/medium/am-2012-02522c_0007.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/am302522c'>ACS Electronic Supporting Info</A></P>
Photoelectrochemical hydrogen evolution of tapered silicon nanowires
Li, Xiaopeng,Xiao, Yanjun,Zhou, Keya,Wang, Junna,Schweizer, Stefan L.,Sprafke, Alexander,Lee, Jung-Ho,Wehrspohn, Ralf B. The Royal Society of Chemistry 2015 Physical chemistry chemical physics Vol.17 No.2
<P>The origin of the photocurrent enhancement and the overpotential reduction in solar water splitting employing nanostructured silicon is still a matter of debate. A set of tapered Si nanowires (SiNWs) has been designed for clarifying the impact of nanostructured Si on the hydrogen evolution reaction (HER) while precisely tailoring several interference factors such as surface area, light absorption and surface defect density. We find that defect passivation by KOH achieved by tapering is much more beneficial than the optical gain. Surfactant-mediated modification of SiNWs is capable of engineering the band structure. As a result, we suggest a guideline for nanostructured Si photoelectrodes optimized for the HER.</P> <P>Graphic Abstract</P><P>The photoelectrochemical performance of Si nanowires can be greatly improved both in photocurrent and photovoltage through a tapering process. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c4cp04396k'> </P>
Coral‑Like NiFe2O4/C Composite as the High‑Performance Anode Material for Lithium‑Ion Batteries
Shanshan Bao,Yifei Xiao,Junfeng Li,Bo Yue,Yanjun Li,Wenxian Sun,Lei Liu,Yi Huang,Li Wang,Peicong Zhang,Xuefei Lai 대한금속·재료학회 2020 ELECTRONIC MATERIALS LETTERS Vol.16 No.3
In this work, we fabricated NiFe2O4/C composite with a coral-like structure through co-precipitation approach followed bythermal decomposition. The composite with a large surface area of 162.1 m2 g−1 and an average pore size of 11.8 nm wasobtained. The porous structure in the composite derived from oxalate can Effectively accommodate the volume changesof NiFe2O4 during the cycling processes. When used as anode materials, the initial charge and discharge capacities of thecomposite were 926.7 and 1277.7 mAh g−1 at 100 mA g−1. After 50 cycles, the reversible capacity of NiFe2O4/C could stillremain at 892.4 mAh g−1. Even at a current density of 2000 mA g−1, the reversible capacity still reached 523.3 mAh g−1. The results showed that the synergy between NiFe2O4 and carbon improved the electrochemical performance, and the porouscomposite could stabilize the structure of the electrode.
Pawar, S.M.,Inamdar, A.I.,Pawar, B.S.,Gurav, K.V.,Shin, S.W.,Yanjun, Xiao,Kolekar, S.S.,Lee, Jung-Ho,Kim, Jin Hyeok,Im, Hyunsik Elsevier 2014 Materials Letters Vol.118 No.-
<P><B>Abstract</B></P> <P>Cu<SUB>2</SUB>ZnSnS<SUB>4</SUB> (CZTS) absorbers have been grown on Mo-coated glass substrates by the rapid thermal processing (RTP) sulfurization of stacked metallic precursor (CZT) films at different annealing temperatures ranging from 500 to 580°C for 5min in sulfur atmosphere. The effects of sulfurization temperature on the structural, morphological, chemical, and optical properties of the CZTS absorbers have been investigated. XRD and Raman studies reveal that the as-deposited stacked metallic precursor films consist of metal elements such as Zn, Sn and binary alloys such as Cu<SUB>6</SUB>Sn<SUB>5</SUB>, Cu<SUB>3</SUB>Sn and CuZn. The sulfurized CZTS absorber films have single phase polycrystalline kesterite crystal structure with dense morphology. At 580°C, the CZT metallic precursor film is fully sulfurized with Zn-rich and Sn-poor composition, and its bandgap energy is found to be 1.50eV. The solar cell fabricated with the CZTS absorber grown at an optimized sulfurization temperature of 580°C shows a conversion efficiency of ~5% for a 0.44cm<SUP>2</SUP> area with <I>V</I> <SUB> <I>oc</I> </SUB>=561mV, <I>J</I> <SUB> <I>sc</I> </SUB>=18.4mA/cm<SUP>2</SUP>, and <I>FF</I>=48.2.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Single phase Cu<SUB>2</SUB>ZnSnS<SUB>4</SUB> is synthesized by rapid thermal processing sulfurization. </LI> <LI> Higher annealing temperature improves the crystallinity of Cu<SUB>2</SUB>ZnSnS<SUB>4</SUB> absorber. </LI> <LI> Cu<SUB>2</SUB>ZnSnS<SUB>4</SUB> absorber is fully sulfurized at 580°C. </LI> <LI> A solar cell with a ~5% conversion efficiency is demonstrated. </LI> </UL> </P>