First-principles studies of K₁ ₋ _xM_xMgH₃ (M = Li, Na, Rb, or Cs) perovskite hydrides for hydrogen storage

Li, Yuanyuan,Mi, Yiming,Chung, Jin Suk,Kang, Sung Gu Elsevier 2018 International journal of hydrogen energy Vol.43 No.4

<P><B>Abstract</B></P> <P>The structural stability and hydrogen release properties of M-doped KMgH<SUB>3</SUB> (M = Li, Na, Rb, or Cs) were examined using density functional theory (DFT) calculations. The reaction enthalpies (ΔH) of the four possible dehydrogenation reaction pathways were calculated using the doped structures with different phases ( P m 3 ¯ m , P<I>nma</I>, and R3<I>c</I>). The most favorable reaction pathway among these four pathways was found. Among the dopants investigated, the most promising dopant for this reaction was Li. In addition, the application of pressure was found to be useful for tuning the reaction enthalpies of the dehydrogenation reactions. Overall, the results present an efficient means of designing new promising perovskite-type hydrides for hydrogen storage.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Perovskite-type KMgH<SUB>3</SUB> is a promising candidate for hydrogen storage. </LI> <LI> The most favorable reaction pathway of dehydrogenation reactions was examined. </LI> <LI> Li was the most useful and effective dopant to release hydrogen. </LI> <LI> Pressure can be usefully employed for tuning the reaction enthalpies of dehydrogenation reactions. </LI> </UL> </P>

Phthalocyanines as medicinal photosensitizers: Developments in the last five years

Li, Xingshu,Zheng, Bing-De,Peng, Xiao-Hui,Li, Song-Zi,Ying, Jia-Wen,Zhao, Yuanyuan,Huang, Jian-Dong,Yoon, Juyoung Elsevier 2019 Coordination Chemistry Reviews Vol.379 No.-

<P><B>Abstract</B></P> <P>Owing to their high extinction coefficients, long absorption wavelengths, and modification tunable photophysical and photochemical properties, phthalocyanines (Pcs) have been widely used as photosensitizers for photodynamic therapy (PDT). Advances made in the past five years on the development of Pcs as medicinal photosensitizers are reviewed and the main design considerations for medicinal applications of these substances are discussed.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Recent progresses made in the development of phthalocyanines for photodynamic therapy are outlined. </LI> <LI> Representative water-soluble phthalocyanines are presented. </LI> <LI> Main targeting strategies are discussed. </LI> <LI> Future challenges are also presented. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Single precursor mediated one-step synthesis of ternary-doped and functionalized reduced graphene oxide by pH tuning for energy storage applications

Khandelwal, Mahima,Li, Yuanyuan,Molla, Aniruddha,Hyun Hur, Seung,Suk Chung, Jin Elsevier 2017 Chemical engineering journal Vol.330 No.-

<P><B>Abstract</B></P> <P>The present work reports for the first time a one-step hydrothermal synthesis of ternary-doped (N, S, and P) reduced graphene oxide (rGO) under acidic pH conditions (NSPrGO2-12) using thiamine pyrophosphate (TPP) as both a reducing agent and a single source N, S, and P doping agent under mild experimental conditions. The change in pH of the reaction mixture from acidic (∼2.2) to basic (∼8.5) creates a change in the surface chemistry of rGO, resulting in TPP-functionalized rGO with modified morphology, structure, surface area and electrochemical performance. This change has been analyzed in terms of the different interactions between the graphene oxide functional groups and various functionalities of TPP at different pH conditions. Under acidic pH conditions, the sample had a crumpled sheet morphology with wrinkles on its surface having interconnected network and possessing a relatively large surface area. Meanwhile, under basic pH conditions, the sample exhibited stacked layer-by-layer sheets that formed an aggregated network-like structure with a smaller surface area. NSPrGO2-12 delivers a high specific capacitance (C<SUB>s</SUB>) value of 269F/g at 20A/g with long cyclic stability (93% retention after 5000 cycles at 20A/g), high coulombic efficiency (100%) and high energy/power density (23.55Wh/kg/7923.4W/kg) in an aqueous electrolyte. Moreover, the C<SUB>s</SUB> value of the ternary-doped rGO is significantly higher than its mono- and co-doped counterparts under similar experimental conditions. These features clearly demonstrate the tremendous potential of NSPrGO2-12 as an electrode material for energy storage applications.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A one-step synthesis of ternary (N, S and P) – doped rGO is demonstrated. </LI> <LI> Thiamine pyrophosphate act as single source precursor for N, S and P dopants. </LI> <LI> Change in pH from acidic (∼2.2) to basic (∼8.5) results in functionalized rGO. </LI> <LI> The resulted tri-doped rGO showed high capacitance of 269F/g at 20A/g. </LI> <LI> Tri-doped rGO shows excellent cycling stability and high energy/power density. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Anion-controlled sulfidation for decoration of graphene oxide with iron cobalt sulfide for rapid sonochemical dyes removal in the absence of light

Molla, Aniruddha,Li, Yuanyuan,Khandelwal, Mahima,Hur, Seung Hyun,Chung, Jin Suk Elsevier 2018 Applied Catalysis A Vol.561 No.-

<P><B>Abstract</B></P> <P>Anion-controlled sulfidation was used to decorate graphene oxide with iron cobalt sulfide via a simple hydrothermal reaction. Anion exchange was carried out using sodium sulfide as an exchanger without any templates or backbone architecture, and in an easy and economical way. Interchange of oxalate, chloride, and hydroxide anions with sulfide anions was performed to tune the morphology of the materials, which subsequently affected their surface area (48.64–83.52 m<SUP>2</SUP>/g) and band gap (2.45–2.91 eV). Ultrasonically-cavity-induced degradation activity without light was rapid (1–3 min) for both positive dyes (rhodamine B and methylene blue), a negative dye (methyl orange), and their mixture. Degradation of the dyes and their mixture in the presence of the prepared samples was a pseudo first-order reaction with rate constant value from 0.780 to 1.702 min<SUP>−1</SUP> that followed the sequence <B>FCS@GO-2 </B>> <B>FCS@GO-1</B> ∼ <B>FCS@GO-3</B> and MB > RhB > MO for catalyst and dyes, respectively. By using terephthalic acid, it was found that the sono-Fenton process quickly generated reactive oxygen species (ROS) even in absence of light. The ROS production was greater for <B>FCS@GO-2</B> than <B>FCS@GO-1</B> or <B>FCS@GO-3</B>, consistent with the catalytic activities of the different catalysts. The prompt production of ROS resulted in a very active process, and the presence of mixed valance states of iron and cobalt resulted in an effective and stable process. It is the synergistic effect of the catalyst that allowed effective breakdown of dyes even in absence of light. The auto-cleaning effect of sonication allowed reuse of the decorated graphene oxide for at least five cycles.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Iron cobalt sulfide@GO was obtained via anion-controlled hydrothermal reaction. </LI> <LI> The band gap, morphology and surface area were tuned via anion exchange. </LI> <LI> The cavity induced sonochemical dyes degradation without light was rapid (1–3 min). </LI> <LI> Generation of ROS by sono-Fenton process was identified using terephthalic acid. </LI> <LI> Dyes degradation was quantitative and repetitive even after five cycles. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>Using anion-controlled sulfidation, the morphology, surface area, and band gap (2.45–2.91 eV) of iron cobalt sulfide-decorated graphene oxide was tuned via a simple hydrothermal reaction and allowed for ultrasonic cavity-induced catalytic removal of organic dyes via a sono-Fenton process in the absence of light.</P> <P>[DISPLAY OMISSION]</P>

LncRNA PVT1 upregulates FBN1 by sponging miR-30b-5p to aggravate pulpitis

Li Yuanyuan,Li Shuangshuang,Li Ruijing,Xu Huilin 대한독성 유전단백체 학회 2023 Molecular & cellular toxicology Vol.19 No.2

Background Pulpitis is a disease mainly caused by bacterial infection. Long noncoding RNAs (lncRNAs) infl uence the advancement of pulpitis. In this paper, we reconnoitered the characters of lncRNA plasmacytoma variant translocation 1 (PVT1) in pulpitis. Objective PVT1, microRNA-30b-5p (miR-30b-5p) and fi brillin 1 (FBN1) levels were identifi ed by qRT-PCR and western blot. In addition, the cell functions were scrutinized. Additionally, the link between miR-30b-5p and PVT1 or FBN1 was identifi ed by dual-luciferase reporter assay. Result The contents of PVT1 and FBN1 were augmented, but the miR-30b-5p level was declined in pulpitis. Knockdown of PVT1 enhanced cell proliferation and cell vitality, whereas inhibited cell infl ammatory reaction in HDPFs under LPS stimulation. In mechanism, PVT1 acted as a miR-30b-5p sponge to adjust the content of FBN1. Moreover, miR-30b-5p mediated LPS-mediated repression of proliferation and promotion of infl ammatory reaction HDPFs by FBN1. Conclusion PVT1 expedited the improvement of pulpitis via miR-30b-5p/FBN1.

The genome of the cucumber, Cucumis sativus L.

Huang, Sanwen,Li, Ruiqiang,Zhang, Zhonghua,Li, Li,Gu, Xingfang,Fan, Wei,Lucas, William J,Wang, Xiaowu,Xie, Bingyan,Ni, Peixiang,Ren, Yuanyuan,Zhu, Hongmei,Li, Jun,Lin, Kui,Jin, Weiwei,Fei, Zhangjun,Li Nature Publishing Group 2009 Nature genetics Vol.41 No.12

Cucumber is an economically important crop as well as a model system for sex determination studies and plant vascular biology. Here we report the draft genome sequence of Cucumis sativus var. sativus L., assembled using a novel combination of traditional Sanger and next-generation Illumina GA sequencing technologies to obtain 72.2-fold genome coverage. The absence of recent whole-genome duplication, along with the presence of few tandem duplications, explains the small number of genes in the cucumber. Our study establishes that five of the cucumber's seven chromosomes arose from fusions of ten ancestral chromosomes after divergence from Cucumis melo. The sequenced cucumber genome affords insight into traits such as its sex expression, disease resistance, biosynthesis of cucurbitacin and 'fresh green' odor. We also identify 686 gene clusters related to phloem function. The cucumber genome provides a valuable resource for developing elite cultivars and for studying the evolution and function of the plant vascular system.

China Design Yearbook Volume 11

Li Yuanyuan 한국콘텐츠학회 2019 한국콘텐츠학회 ICCC 논문집 Vol.2019 No.12

China Design Yearbook Volume 11

Li Yuanyuan 한국콘텐츠학회 2019 ICCC International Digital Design Invitation Exhib Vol.2019 No.12

Recent Advances in Sedimentation and River Mechanics

Li Yuanyuan 한국수자원학회 2002 한국수자원학회 학술대회 Vol.2002 No.1

Pollution

Li Yuanyuan 한국콘텐츠학회 2020 ICCC International Digital Design Invitation Exhib Vol.2020 No.11