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16-Hydroxybriaranes from the octocoral Briareum stechei

Phytochemistry Letters 2023年第1期57卷 92-95页

作者： Liu, Chia-Jung Wang, Chien-Chiao Chang, Chun-Feng Zhang, Mingzi M. Tsou, Lun Kelvin Wen, Zhi-Hong Hwang, Tsong-Long Chen, You-Ying Sung, Ping-Jyun Department of Marine Biotechnology and Resources National Sun Yat-sen University Kaohsiung 804201 Taiwan National Museum of Marine Biology and Aquarium Pingtung 944401 Taiwan Graduate Institute of Natural Products College of Medicine Chang Gung University Taoyuan 333323 Taiwan Graduate Institute of Biomedical Sciences College of Medicine Chang Gung University Taoyuan 333323 Taiwan Division of Urology Department of Surgery Kaohsiung Armed Forces General Hospital Kaohsiung 802301 Taiwan Institute of Molecular and Genomic Medicine National Health Research Institutes Miaoli Zhunan 350401 Taiwan Institute of Biotechnology and Pharmaceutical Research National Health Research Institutes Miaoli Zhunan 350401 Taiwan Department of Anesthesiology Chang Gung Memorial Hospital Taoyuan 333008 Taiwan Research Center for Chinese Herbal Medicine Graduate Institute of Healthy Industry Technology College of Human Ecology Chang Gung University of Science and Technology Taoyuan 333324 Taiwan Department of Chemical Engineering Ming Chi University of Technology New Taipei 243303 Taiwan Chinese Medicine Research and Development Center China Medical University Hospital Taichung 404394 Taiwan Graduate Institute of Natural Products Kaohsiung Medical University Kaohsiung 807378 Taiwan Ph.D. Program in Pharmaceutical Biotechnology Fu Jen Catholic University New Taipei City 242062 Taiwan

Two new 16-hydroxybriaranes, 11-dehydroxybriavioid B (1) and 12-epi-briastecholide L (2), have been isolated from an algal-containing octocoral identified as Briareum stechei. The structures of metabolites 1 and 2 were corroborated by extensive 2D-NMR studies and comparison with literature data. Briarane 2 was found to reduce the release of inducible nitric oxide synthase (iNOS) to 87.92 %, at a concentration of 10 μM. © 2023 Phytochemical Society of Europe

关键词： Briarane Briareum stechei Briastecholide Briavioid iNOS

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Approaching highly stable optoelectronic device operation at elevated temperature by locking backbone torsion of conjugated polymers

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Matter 2025年

作者： Zhiqiang Cao Zhaofan Li Angela Awada Sara A. Tolba Madison Mooney Yangyang Wang Yu-Cheng Chiu Simon Rondeau-Gagné Wenjie Xia Xiaodan Gu School of Polymer Science and Engineering Center for Optoelectronic Materials and Devices The University of Southern Mississippi Hattiesburg MS 39406 USA Department of Aerospace Engineering Iowa State University Ames IA 50011 USA Department of Chemistry and Biochemistry University of Windsor Windsor Ontario N9B3P4 Canada Materials and Nanotechnology Program North Dakota State University Fargo ND 58102 USA Center for Nanophase Materials Sciences Oak Ridge National Laboratory Oak Ridge TN 37831 USA Department of Chemical Engineering National Taiwan University of Science and Technology Taipei City 10607 Taiwan

The ability of organic electronics to maintain stability at elevated temperatures is crucial for the longevity of optoelectronic devices. However, achieving stable optoelectronic properties for conjugated polymers remains fundamentally challenging. Here, we identify backbone twisting motion as the primary reason for the unstable optoelectronic properties of donor-acceptor (D-A) conjugated polymers, using diketopyrrolopyrrole (DPP)-based polymers as a model system. The backbone thiophene-ring twist transition is responsible for shifts in the band gap and alterations in charge transport properties. The twisting motion of the thiophene induces localization of the intrachain electrons, resulting in reduced charge carrier mobility and a significant blue shift in optical absorption. Additionally, we demonstrated that intramolecular hydrogen bonding interaction within DPP polymers can suppress undesired backbone twisting at elevated temperatures, thereby ensuring a more stable optoelectronic property. Our work offers fundamental insights into the decline in device stability at elevated temperatures and a strategy to enhance device stability.

关键词： conjugated polymers chain dynamics charge transport optoelectronic property device stability MAP 3: Understanding

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Pretreatment of Herbal, Tofu and Fertilizer Waste Using UV/Ozon Technique and Its Utilization for Spirulina sp Cultivation 1

Pretreatment of Herbal, Tofu and Fertilizer Waste Using UV/O...

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1st International Conference on Smart City Innovation, ICSCI 2018

作者： Hadiyanto, H. Digda, A. Adetya, N.P. Evanty, M. Chemical Engineering Department Faculty of Engineering Diponegoro University Indonesia Graduate Program of Environmental Science School of Postgraduate Studies Diponegoro University Jalan Prof. Soedarto SH Tembalang Semarang Kotak Pos1269 Indonesia

The herbal, tofu and fertilizer industries contribute considerable waste to the environment. The waste contains COD and organic substances which should be reduced before it is discharged to the environmental body. One of methods is by using Advanced Oxidation Processes (AOPs) degradation method. The process of AOPs in this study used a combination of UV irradiation and ozone to produce hydroxyl radicals. This study was aimed to investigate the degradation of chemical Oxygen Demand (COD) by using AOP techniques and to evaluate the treated waste for microalgae growth. This research consists of two steps: (1) the initial COD degradation using UV-Ozon. (2) utilization of the treated waste for microalgae cultivation by combining a mixed nutrient of waste and 10 mg/L TSP, 10 mg/L Urea, 80mg/L NaHCO3. The results showed that the COD degraded by UV/Ozone follows the first order equation by k value of 0.082/day, 0.223/day and 0.436/day for tofu, herbal and fertilizer waste respectively. The growth rate of Spirulina cultivated in waste medium was in comparable with the one cultivated in control medium. © 2019 IOP Publishing Ltd. All rights reserved.

关键词： chemical oxygen demand

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Rapid and highly efficient adsorption of dye and heavy metal on low-cost adsorbent derived from human feces and Chlorella vulgaris

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Environmental Nanotechnology, Monitoring and Management 2023年 20卷

作者： Wibowo, Yudha Gusti Lululangin, Bonifasius Revo Gifta Safitri, Hana Rohman, Arif Sudibyo Priyanto, Sugeng Syarifuddin, Hutwan Tatik Maryani, Anis Tawfiqurahman Yuliansyah, Ahmad Kurniawan, Ade Tsabitah, Natasya Taher, Tarmizi Petrus, Himawan Tri Bayu Murti Sustainable Mining and Environmental Research Group Department of Mining Engineering Institut Teknologi Sumatera Jl. Terusan Ryacudu Way Huwi Kec. Jati Agung Kabupaten Lampung Selatan Lampung 35365 Indonesia Center for Green and Sustainable Materials Institut Teknologi Sumatera Jl. Terusan Ryacudu Way Huwi Kec. Jati Agung Kabupaten Lampung Selatan Lampung 35365 Indonesia Departement of Chemical Engineering Universitas Gadjah Mada Jl Grafika No. 2 Sleman Bulaksumur 55284 Indonesia Department of Geomatic Engineering Institut Teknologi Sumatera Jl. Terusan Ryacudu Way Huwi Kec. Jati Agung Kabupaten Lampung Selatan Lampung 35365 Indonesia Research Center for Mining Technology - National Research and Innovation Agency Jl. Ir. Sutami KM. 15 Tanjung Bintang South Lampung Lampung 35361 Indonesia Department of Mechanical Engineering Universitas Negeri Jakarta Jakarta Indonesia Postgraduate Program of Environmental Science Universitas Jambi Jambi Indonesia Department of Environmental Engineering Institut Teknologi Sumatera Jl. Terusan Ryacudu Way Huwi Kec. Jati Agung Kabupaten Lampung Selatan Lampung 35365 Indonesia

Wastewater management is a pressing global concern, demanding effective, efficient, cost-friendly, and user-friendly solutions. Among the various methods available, adsorption has emerged as a practical choice. The primary culprits responsible for many human diseases in wastewater are heavy metals and dyes. In this study, we successfully harnessed low-cost biochar derived from human feces and Chlorella vulgaris to significantly accelerate and enhance the removal of heavy metals and dyes. Human feces and Chlorella vulgaris were transformed into biochar under three distinct conditions: biochar, Chlorella vulgaris, and a combination of both. Notably, these materials exhibited exceptional capabilities, removing heavy metals and dyes by as much as 98 % within a mere 10-minute timeframe. This material have adsorption capacity up to 56.8 mg/g for Mn and 20 mg/g for Methylene Blue. To comprehensively evaluate the performance of the optimal samples, we conducted a battery of tests, including performance assessments, sorption capacity measurements, exploration of five isotherm models, and kinetic analyses. Furthermore, we elucidated the sorption mechanisms through thorough characterizations of the materials using SEM, XRD, FTIR, and XRF, providing holistic insights into their properties. This study extends its relevance beyond the laboratory, offering valuable insights into future prospects and policy recommendations. In doing so, it serves as a pivotal resource for researchers and governmental bodies alike, facilitating progress in wastewater treatment and environmental policy development. © 2023 Elsevier B.V.

关键词： Adsorption Biochar Dye sorption Heavy metal sorption Nanocomposite material Wastewater

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Peptide-Coated Bacteriorhodopsin-Based Photoelectric Biosensor for Detecting Rheumatoid Arthritis

Biosensors

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Biosensors 2023年第10期13卷 929-929页

作者： Chen, Hsiu-Mei Tsai, Yi-Hsuan Hsu, Chien-Yi Wang, Yong-Yi Hsieh, Cheng-En Chen, Jin-Hua Chang, Yu-Sheng Lin, Ching-Yu Department of Chemical Engineering National Taiwan University of Science and Technology Taipei10607 Taiwan Department of Family Medicine Wan Fang Hospital Taipei Medical University Taipei11696 Taiwan Division of Cardiology and Cardiovascular Research Center Department of Internal Medicine Taipei Medical University Hospital Taipei11031 Taiwan Division of Cardiology Department of Internal Medicine School of Medicine College of Medicine Taipei Medical University Taipei11031 Taiwan Taipei Heart Institute Taipei Medical University Taipei11031 Taiwan Graduate Institute of Data Science College of Management Taipei Medical University Taipei11031 Taiwan Office of Data Science Taipei Medical University Taipei11031 Taiwan Division of Allergy Immunology and Rheumatology Department of Internal Medicine Shuang Ho Hospital Taipei Medical University New Taipei City23561 Taiwan Division of Allergy Immunology and Rheumatology Department of Internal Medicine School of Medicine College of Medicine Taipei Medical University Taipei11031 Taiwan School of Medical Laboratory Science and Biotechnology College of Medical Science and Technology Taipei Medical University Taipei11031 Taiwan Ph.D. Program in Medical Biotechnology College of Medical Science and Technology Taipei Medical University Taipei11031 Taiwan

An effective early diagnosis is important for rheumatoid arthritis (RA) management. This study reveals a novel RA detection method using bacteriorhodopsin as a photoelectric transducer, a light-driven proton pump in purple membranes (PMs). It was devised by covalently conjugating a PM monolayer-coated electrode with a citrullinated-inter-alpha-trypsin inhibitor heavy chain 3 (ITIH3)542–556 peptide that recognizes the serum RA-associated autoantibodies. The direct serum coating decreased the photocurrents in the biosensor, with the reduction in the photocurrent caused by coating with an RA-patient serum that is significantly larger than that with a healthy-control serum (38.1% vs. 20.2%). The difference in the reduction in the photocurrent between those two serum groups widened after the serum-coated biosensor was further labeled with gold nanoparticle (AuNP)-conjugated anti-IgA (anti-IgA-AuNP) (53.6% vs. 30.6%). Both atomic force microscopic (AFM) and Raman analyses confirmed the sequential peptide, serum, and anti-IgA-AuNP coatings on the PM-coated substrates. The reductions in the photocurrent measured in both the serum and anti-IgA-AuNPs coating steps correlated well with the results using commercial enzyme-linked immunosorbent assay kits (Spearman rho = 0.805 and 0.787, respectively), with both a sensitivity and specificity close to 100% in both steps. It was shown that an RA diagnosis can be performed in either a single- or two-step mode using the developed biosensor. © 2023 by the authors.

关键词： Peptides

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Computational Identification and Experimental Demonstration of High-Performance Methane Sorbents

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Angewandte Chemie 2022年第25期134卷

作者： Dr. Karabi Nath Dr. Alauddin Ahmed Prof. Dr. Donald J. Siegel Prof. Dr. Adam J. Matzger Department of Chemistry and Macromolecular Science and Engineering Program University of Michigan 930 North University Avenue Ann Arbor MI 48109 USA Mechanical Engineering Department University of Michigan Ann Arbor MI 48109 USA Materials Science and Engineering Applied Physics Program and University of Michigan Energy Institute University of Michigan Ann Arbor MI 48109 USA Current address: Walker Department of Mechanical Engineering Texas Materials Institute and Oden Institute for Computational Engineering and Sciences University of Texas at Austin 204 E. Dean Keeton Street ETC II 5.160 Austin TX 78712-1591 USA

Remarkable methane uptake is demonstrated experimentally in three metal-organic frameworks (MOFs) identified by computational screening: UTSA-76, UMCM-152 and DUT-23-Cu. These MOFs outperform the benchmark sorbent, HKUST-1, both volumetrically and gravimetrically, under a pressure swing of 80 to 5 bar at 298 K. Although high uptake at elevated pressure is critical for achieving this performance, a low density of high-affinity sites (coordinatively unsaturated metal centers) also contributes to a more complete release of stored gas at low pressure. The identification of these MOFs facilitates the efficient storage of natural gas via adsorption and provides further evidence of the utility of computational screening in identifying overlooked sorbents.

关键词： Computational Screening Deliverable Capacity Interatomic Potentials Metal Organic Framework (MOF) Methane Storage

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Assembly Controlled by Shape

Assembly Controlled by Shape

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作者： Lisunova, Milana O. School of Materials Science and Engineering and School of Chemistry and Biochemistry Georgia Institute of Technology AtlantaGA30332 United States MicroElectronics-Photonics Program Institute for Nanoscience and Engineering Ralph E. Martin Department of Chemical Engineering FayettevilleAR72701 United States

To research the impact of the shape on the assembly of the natural objects (protein, virus, bacteria, living cells) the polymer microcapsules with similar surface chemistry and different by shape (spherical, cubical and tetrahedral) had been synthesized. It was found that the energetically favourable face-To-face attachment of anisotropic microcapsules drives the formation of stable and compacted assembly while isotropic microcapsules assembly is mobile and chain-like structures with a point like a contact area. The difference in assembling behaviour of anisotropic (cubic, tetrahedral) and isotropic (spherical) microparticles is related to the fact that the interfacial hydrophobic energies between the anisotropic microparticles are 6-4 orders of magnitude higher than that for the isotropic microparticles due to the significantly higher contact area of anisotropic microparticles. Such mimicking of the natural objects by polymer microcapsules and research their interaction driven by shape explains the arrangements of isotropic and anisotropic cells in bacteria and its mobility. Copyright © Materials Research Society 2018.

关键词： Self assembly

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Methylation of PLK1 by SET7/9 ensures accurate kinetochore–microtubule dynamics

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Journal of Molecular Cell Biology 2020年第6期12卷 462-476页

作者： Ruoying Yu Huihui Wu Hazrat Ismail Shihao Du Jun Cao Jianyu Wang Tarsha Ward Fengrui Yang Ping Gui Mahboob Ali Lingluo Chu Fei Mo Qi Wang Youjun Chu Jianye Zang Yun Zhao Mingliang Ye Guowei Fang Peng RChen Zhen Dou Xinjiao Gao Wenwen Wang Xing Liu Xuebiao Yao MOE Key Laboratory for Cellular Dynamics&Anhui Key Laboratory for Chemical Biology CAS Center for Excellence in Molecular Cell ScienceHefei National Science Center for Physical Sciences at Microscale&University of Science and Technology of ChinaHefei 230027China BUCM-MSM-USTC Joint Program on Global Health Equity Beijing University of Chinese MedicineBeijing 100029China Department of Physiology Morehouse School of MedicineAtlantaGA 30310USA Harvard Medical School BostonMA 02115USA Dalian Institute for Physical Chemistry Dalian 116023China Shanghai Institute of Biochemistry and Cell Biology Center for Excellence in Molecular Cell ScienceChinese Academy of SciencesShanghai 200031China College of Chemistry and Molecular Engineering Peking UniversityBeijing 100871China

Faithful segregation of mitotic chromosomes requires bi-orientation of sister chromatids, which relies on the sensing of correct attachments between spindle microtubules and kinetochores. Although the mechanisms underlying PLK1 activation have been extensively studied, the regulatory mechanisms that couple PLK1 activity to accurate chromosome segregation are not well understood. In particular, PLK1 is implicated in stabilizing kinetochore–microtubule attachments, but how kinetochore PLK1 activity is regulated to avoid hyperstabilized kinetochore–microtubules in mitosis remains elusive. Here, we show that kinetochore PLK1 kinase activity is modulated by SET7/9 via lysine methylation during early mitosis. The SET7/9-elicited dimethylation occurs at the Lys191 of PLK1, which tunes down its activity by limiting ATP utilization. Overexpression of the non-methylatable PLK1 mutant or chemical inhibition of SET7/9 methyltransferase activity resulted in mitotic arrest due to destabilized kinetochore–microtubule attachments. These data suggest that kinetochore PLK1 is essential for stable kinetochore–microtubule attachments and methylation by SET7/9 promotes dynamic kinetochore–microtubule attachments for accurate error correction. Our findings define a novel homeostatic regulation at the kinetochore that integrates protein phosphorylation and methylation with accurate chromosome segregation for maintenance of genomic stability.

关键词： mitosis PLK1 kinase SET7/9 methylation kinetochore-microtubule attachment

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In-situ observation of hydrogen nanobubbles formation on graphene surface by AFM-SECM

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Electrochimica Acta 2024年 493卷

作者： Kholimatussadiah, Septia Hsu, Chia-Ling Ke, Shang-Wei Chou, Tsu-Chin Wu, Yung-Fu Yakimova, Rositsa Kumatani, Akichika Chen, Kuei-Hsien Chen, Li-Chyong Du, He-Yun Department of Physics National Taiwan University Taipei 10617 Taiwan Nano Science and Technology Taiwan International Graduate Program Academia Sinica Taipei 10617 Taiwan Center for Condensed Matter Sciences National Taiwan University Taipei 10617 Taiwan Center of Atomic Initiative for New Materials National Taiwan University Taipei 10617 Taiwan Department of Chemical Engineering Ming Chi University of Technology New Taipei City24301 Taiwan Institute of Atomic and Molecular Sciences Academia Sinica Taipei 10617 Taiwan Institute of Analytical and Environmental Sciences National Tsing Hua University Hsinchu 300044 Taiwan Department of Physics Chemistry and Biology Linköping University SE-581 83 Linköping Sweden Institute of Engineering Innovation School of Engineering The University of Tokyo Tokyo 113-8656 Japan Saitama 332-0012 Japan Tohoku University Sendai980-8577 Japan Battery Research Center of Green Energy Ming Chi University of Technology New Taipei City24301 Taiwan Biochemical Technology R&D Center Ming Chi University of Technology New Taipei City24301 Taiwan Center for Sustainability and Energy Technologies Chang Gung University Taoyuan City33302 Taiwan

Gas bubble evolution is an important phenomenon in many electrochemical processes and it is highly sensitive to the surface properties. Here we visualize the gas bubble dynamics on the surface of different graphene substrates during hydrogen evolution reaction (HER) using atomic force microscopy combined with scanning electrochemical microscopy. The low overpotential and low surface hydrophobicity of few-layer graphene formed on C-phase SiC causes the uniform distribution of hydrogen nanobubbles, which easily depart from the surface during the reaction. Conversely, the high overpotential and more hydrophobic surface of HOPG induces hydrogen bubbles to linger on the surface for an extended duration, leading to its accumulation and the subsequent formation of microbubbles. This in-situ nanoscale electrochemical mapping of hydrogen bubble dynamics provides new insight into electrocatalytic HER that occurs on non-metal electrodes. © 2024 Elsevier Ltd

关键词： Graphene

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Nonreciprocal interactions induced by water in confinement

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Physical Review Research 2020年第4期2卷 043244-043244页

作者： Felipe Jiménez-Ángeles Katherine J. Harmon Trung Dac Nguyen Paul Fenter Monica Olvera de la Cruz Department of Materials Science and Engineering Northwestern University Evanston Illinois 60208 USA Applied Physics Graduate Program Northwestern University Evanston Illinois 60208 USA Department of Chemical and Biological Engineering Northwestern University Evanston Illinois 60208 USA Chemical Sciences and Engineering Division Argonne National Laboratory Lemont Illinois 60439 USA Department of Physics and Astronomy Northwestern University Evanston Illinois 60208 USA Department of Chemistry Northwestern University Evanston Illinois 60208 USA

Water mediates electrostatic interactions via the orientation of its dipoles around ions, molecules, and interfaces. This induced water polarization consequently influences multiple phenomena. In particular, water polarization affects ion adsorption and transport, biomolecular self-assembly, and surface chemical reactions. Therefore, it is of paramount importance to understand water-mediated interactions modulated by nanoconfinement at the nanoscale. Here we investigate the effective interaction between two oppositely charged ions in different positions in water confined between two graphene surfaces. We find that the attraction between physisorbed ions is enhanced in the surface normal direction while the in-plane interaction is almost unaffected. The attraction in the surface normal direction is further enhanced by decreasing the confinement distance. Conversely, when one ion is intercalated into the graphene layers, the interaction becomes repulsive. Moreover, upon exchange of the ions' positions along the surface normal direction, the interaction energy changes by about 5kBT. The nonequivalent and directional properties found here, referred to as nonreciprocal interactions, cannot be explain by current water permittivity models in confinement. Our x-ray reflectivity experiments of the water structure near a graphene surface support our molecular dynamics simulation results. Our work shows that the water structure is not enough to infer electrostatic interactions near interfaces.

关键词： Confinement Dielectric properties Surface & interfacial phenomena Polarization Molecular dynamics X-ray reflectivity

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