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Recent Advances in Catalytic Carbonylation Reactions in Alternative Reaction Media

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Chinese Journal of Chemistry 2024年第4期42卷 406-429页

作者： Csaba Árvai László T.mika Department of Chemical and Environmental Process Engineering Faculty of Chemical Technology and BiotechnologyBudapest University of Technology and EconomicsMűegyetem rkp.3H-1111 BudapestHungary

Since the discovery of the hydroformylation(oxo-synthesis or Roelen reaction)and the Reppe-reaction,the transition metal-catalyzed carbonylation reactions,providing versatile,facile,and even atom-economic methods for the selective incorporation of C=O functionality to various skeletons,have gained tremendous importance in synthetic organic chemistry from laboratories to industrial applications.The carbonylation of carbon-carbon multiple bonds,aromatic halides,triflates,etc.,in the presence of various nucleophiles has led the way to produce aldehydes,carboxylic acids,esters,amides,etc.,in the fine chemical industry.However,these protocols usually proceed in conventional,fossil-based,and usually toxic reaction environments.Thus,several attempts have been directed to developing efficient carbonylation methods in alternative,less harmful,non-fossil-based and even in renewable reaction media.In this review,we overview the recent applications of alternative solvents such as water,biomass-based alcohols,γ-valerolactone(GVL),2-methyltetrahydrofuran(2-MeTHF),ionic liquids(ILs),deep eutectic solvents(DES),alkyl levulinates,limonene,α-pinene,and dimethyl carbonate as well as fluorous media to improve efficiency,safety and environmentally benign nature of carbonylation protocols.

关键词： Carbonylation Catalysis Solvents Green chemistry Carbon monoxide Transition metals Homogeneous catalysis Palladium

Immunotherapy for esophageal cancer:Where are we now and where can we go

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World Journal of Gastroenterology 2024年第19期30卷 2496-2501页

作者： Yoshiaki Shoji Kazuo Koyanagi Kohei Kanamori Kohei Tajima mika Ogimi Yamato Ninomiya Miho Yamamoto Akihito Kazuno Kazuhito Nabeshima Takayuki Nishi Masaki Mori Department of Gastroenterological Surgery Tokai University School of MedicineKanagawa 259-1193Japan

Immune checkpoint inhibitor therapy has dramatically improved patient prognosis,and thereby transformed the treatment in various cancer types including esophageal squamous cell carcinoma(ESCC)in the past decade.Monoclonal antibodies that selectively inhibit programmed cell death-1(PD-1)activity has now become standard of care in the treatment of ESCC in metastatic settings,and has a high expectation to provide clinical benefit during perioperative period.Further,anti-cytotoxic T-lymphocyte–associated protein 4(CTLA-4)monoclonal antibody has also been approved in the treatment of recurrent/metastatic ESCC in combination with anti-PD-1 antibody.Well understanding of the existing evidence of immune-based treatments for ESCC,as well as recent clinical trials on various combinations with chemotherapy for different clinical settings including neoadjuvant,adjuvant,and metastatic diseases,may provide future prospects of ESCC treatment for better patient outcomes.

关键词： Esophageal cancer Immunotherapy Immune checkpoint inhibitor Programmed cell death-1 Anti-cytotoxic T-lymphocyte-associated protein 4 Neoadjuvant therapy Adjuvant therapy Clinical trials Combination therapy

乡村振兴背景下乡村法治保障与治理现代化的关系

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黑河学院学报 2024年第1期15卷 89-91,103页

作者：米卡热木·努尔麦买提喀什大学法政学院新疆喀什844000

乡村治理法治保障是目前乡村社会发展的一个重要途径,既能促进农村社会发展,又能辅助实施乡村振兴战略。乡村治理的法治和乡村振兴战略是相互补充、相互促进的。乡村振兴背景下乡村法治保障是治理现代化的重要内涵,其目标是对乡村治理... 详细信息

乡村治理法治保障是目前乡村社会发展的一个重要途径,既能促进农村社会发展,又能辅助实施乡村振兴战略。乡村治理的法治和乡村振兴战略是相互补充、相互促进的。乡村振兴背景下乡村法治保障是治理现代化的重要内涵,其目标是对乡村治理的法治思维进行重新定位,使其与乡村振兴战略的实施紧密联系,同时,考虑乡村治理和乡村社会建设之间的关系,以期促进乡村社会整体进步与发展。

关键词：乡村振兴乡村法治保障治理现代化可行性

Synthesis of malachite@clay nanocomposite for rapid scavenging of cationic and anionic dyes from synthetic wastewater

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Journal of Environmental Sciences 2017年第1期29卷 97-110页

作者： Varsha Srivastava mika Sillanpää Laboratory of Green Chemistry School of Engineering ScienceLappeenranta University of TechnologySammonkatu 12FI 50130MikkeliFinland

Synthesis of malachite@clay nanocomposite was successfully carried out for the removal of cationic（Methylene Blue,MB） and anionic dyes（Congo Red,CR） from synthetic wastewater.Nanocomposite was characterized by TEM,SEM,FT-IR,EDS analysis and zeta potential.TEM analysis indicated that the particle diameter of nanocomposite was in the range of 14 to23 nm.Various important parameters viz.contact time,concentration of dyes,nanocomposite dosage,temperature and solution pH were optimized to achieve maximum adsorption capacity.In the case of MB,removal decreased from 99.82%to 93.67%while for CR,removal decreased from 88.55%to 75.69%on increasing dye concentration from 100 to 450 mg/L.pH study confirmed the higher removal of CR in acidic range while MB removal was higher in alkaline range.Kinetic study revealed the applicability of pseudo-second-order model for the adsorption of both dyes.Negative values of AG0 for both systems suggested the feasibility of dye removal and support for spontaneous adsorption of CR and MB on nanocomposite.Nanocomposite showed 277.77 and 238.09 mg/g Langmuir adsorption capacity for MB and CR respectively.Desorption of dyes from the dye loaded nanocomposite was easily carried out with acetone.The results indicate that the prepared malachite@clay nanocomposite is an efficient adsorbent with high adsorption capacity for the aforementioned dyes.

关键词： Adsorption Bentonite Dyes Kinetic study Methylene blue Congo red

The ALMA-QUARKS Survey. Ⅱ. The ACA 1.3 mm Continuum Source Catalog and the Assembly of Dense Gas in Massive Star-Forming Clumps

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Research in Astronomy and Astrophysics 2024年第6期 121-141页

作者：许峰玮 Ke Wang Tie Liu Lei Zhu Guido Garay Xunchuan Liu Paul Goldsmith Qizhou Zhang Patricio Sanhueza Shengli Qin Jinhua He mika Juvela Anandmayee Tej Hongli Liu Shanghuo Li Kaho Morii Siju Zhang Jianwen Zhou Amelia Stutz Neal J.Evans Kee-Tae Kim Shengyuan Liu Diego Mardones Guangxing Li Leonardo Bronfman Ken'ichi Tatematsu Chang Won Lee Xing Lu Xiaofeng Mai Sihan Jiao James O.Chibueze Keyun Su Viktor L.Tóth School of Physics and Astronomy Yunnan University Yunnan Observatories Chinese Academy of Sciences Department of Physics University of Helsinki Indian Institute of Space Science and Technology Max Planck Institute for Astronomy Department of Astronomy Graduate School of Science The University of Tokyo Max-Planck-Institut für Radioastronomie Departamento de Astronom'?a Universidad de Concepcion Department of Astronomy The University of Texas at Austin Korea Astronomy and Space Science Institute Kavli Institute for Astronomy and Astrophysics Peking University Institute of Astronomy and Astrophysics Academia Sinica South-Western Institute for Astronomy Research Yunnan University University of Science and Technology National Astronomical Observatories Chinese Academy of Sciences Department of Mathematical Sciences University of South Africa Centre for Space Research Physics Department North-West University Department of Physics and Astronomy Faculty of Physical Sciences University of Nigeria Institute of Physics and Astronomy E?tv?s Lorànd University University of Debrecen Faculty of Science and Technology Department of Astronomy School of Physics Peking University Shanghai Astronomical Observatory Chinese Academy of Sciences Chinese Academy of Sciences South America Center for Astronomy National Astronomical Observatories Chinese Academy of Sciences Departamento de Astronomía Universidad de Chile Jet Propulsion Laboratory California Institute of Technology Center for Astrophysics | Harvard & Smithsonian National Astronomical Observatory of Japan National Institutes of Natural Sciences Astronomical Science Program The Graduate University for Advanced Studies

Leveraging the high resolution, sensitivity, and wide frequency coverage of the Atacama Large Millimeter/submillimeter Array（ALMA）, the QUARKS survey, standing for “Querying Underlying mechanisms of massive star formation with ALMA-Resolved gas Kinematics and Structures”, is observing 139 massive starforming clumps at ALMA Band 6（λ～1.3 mm）. This paper introduces the Atacama Compact Array（ACA） 7 m data of the QUARKS survey, describing the ACA observations and data reduction. Combining multiwavelength data, we provide the first edition of QUARKS atlas, offering insights into the multiscale and multiphase interstellar medium in high-mass star formation. The ACA 1.3 mm catalog includes 207 continuum sources that are called ACA sources. Their gas kinetic temperatures are estimated using three formaldehyde transitions with a non-LTE radiation transfer model, and the mass and density are derived from a dust emission model. The ACA sources are massive（16–84 percentile values of 6–160 M⊙）, gravity-dominated(M ∝ R1.1)fragments within massive clumps, with supersonic turbulence（M >1） and embedded star-forming protoclusters. We find a linear correlation between the masses of the fragments and the massive clumps,with a ratio of 6% between the two. When considering fragments as representative of dense gas, the ratio indicates a dense gas fraction（DGF） of 6%, although with a wide scatter ranging from 1% to 10%. If we consider the QUARKS massive clumps to be what is observed at various scales, then the size-independent DGF indicates a self-similar fragmentation or collapsing mode in protocluster formation. With the ACA data over four orders of magnitude of luminosity-to-mass ratio（L/M）, we find that the DGF increases significantly with L/M, which indicates clump evolutionary stage. We observed a limited fragmentation at the subclump scale,which can be explained by a dynamic global collapse process.

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Oscillating droplet tribometer for sensitive and reliable wetting characterization of superhydrophobic surfaces

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Droplet 2022年第1期1卷 38-47页

作者： Muhammad Junaid Heikki A.Nurmi mika Latikka Maja Vuckovac Robin H.A.Ras Department of Applied Physics School of ScienceAalto UniversityEspooFinland Department of Bioproducts and Biosystems School of Chemical EngineeringAalto UniversityEspooFinland

Accurate wetting characterization is crucial for the development of next‐generation superhydrophobic surfaces.Traditionally,wetting properties are measured with a contact angle goniometer(CAG)suitable for a broad range of surfaces.However,due to optical errors and challenges in baseline positioning,the CAG method suffers from inaccuracies on superhydrophobic surfaces.Here we present an improved version of the oscillating droplet tribometer(ODT),which can reliably assess wetting properties on superhydrophobic surfaces by measuring the frictional forces of a water‐based ferrofluid droplet oscillating in a magnetic field.We demonstrate that ODT has superior accuracy compared to CAG by measuring the wetting properties of four different superhydrophobic surfaces(commercial Glaco and Hydrobead coatings,black silicon coated with fluoropolymer,and nanostructured copper modified with lauric acid).We show that ODT can detect the small but significant changes in wetting properties caused by the thermal restructuring of surfaces that are undetectable by CAG.Even more,unlike any other wetting characterization technique,ODT features an inverse sensitivity:the more repellent the surface,the lower the error of measurement,which was demonstrated by experiments and simulations.

关键词： oscillating frictional wetting

Effects of alginate and laminaran on the microbiota and antioxidant properties of human faecal cultures

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Food Bioscience 2022年第3期47卷 1244-1251页

作者： Gayang Lee mika Harada Yuko Midorikawa Mahiro Yamamoto Ayaka Nakamura Hajime Takahashi Takashi Kuda Department of Food Science and Technology Tokyo University of Marine Science and Technology4-5-7 KonanMinato-kuTokyo108-8477Japan

Alginate and laminaran are water soluble dietary fibres in brown algae.In a previous study,pure cultures of Bacteroides xylanisolvens,Bacteroides uniformis,and Erysipelaclostridium ramosum increased antioxidant capacities in the broth with alginate and/or laminaran fermentation.This study was conducted to evaluate the presence of the alginate-and laminaran-responsive human gut indigenous bacteria(RIB)and their functions.Briefly,human stool samples were cultured in media without(control),or with 1%(w/v)alginate or laminaran at 37℃ for 24 h under anaerobic conditions.Results showed that during incubation,the pH of the culture reduced with the polysaccharides.Phenol production was clearly suppressed via laminaran supplementation in the faecal sample cultures.The 16S rRNA(V4)gene amplicon sequencing confirmed that B.xylanisolvens-,B.uniformis and E.ramosum-like bacteria were alginate-and/or laminaran-RIB in human gut,although their read numbers differed among individuals.Additionally,some butyrate-producers,such as Faecalibacterium and Roseburia,were also detected as the RIB in alginate and laminaran cultures,respectively.Fermentation increased 1,1-diphenyl-2-picrylhydrazyl and superoxide anion radical-scavenging capacities and the Fe-reducing power of the culture medium.Additionally,the fermented cultures increased the nitric oxide secretion in macrophage like RAW 264.7 cells culture.These results suggest that the interaction of alginate and laminaran with their RIB may have desirable effects on the host as next generation prebiotics when brown algae are ingested.

关键词： Alginate Laminaran Human gut microbiota Antioxidant capacity Faecal culture

Zinc-Based Metal-Organic Frameworks for High-Performance Supercapacitor Electrodes:Mechanism Underlying Pore Generation

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Energy & Environmental Materials 2023年第2期6卷 100-112页

作者： Shigeyuki Umezawa Takashi Douura Koji Yoshikawa Daisuke Tanaka Vlad Stolojan S.Ravi P.Silva mika Yoneda Kazuma Gotoh Yasuhiko Hayashi Seiwa Electric Mfg.Co.Ltd. Kyoto 610-0192Japan Graduate School of Natural Science and Technology Okayama UniversityOkayama 700-8350Japan School of Science and Technology Kwansei Gakuin UniversityHyogo 669-1337Japan JST PRESTO2-1 GakuenHyogo 669-1337Japan Advanced Technology Institute University of SurreyGuilfordSurreyGU27XHUK

Heat treatment of metal-organic frameworks(MOFs)has provided a wide variety of functional carbons coordinated with metal compounds.In this study,two kinds of zinc-based MOF(ZMOF),C_(16)H_(10)O_(4)Zn(ZMOF1)and C_(8)H_(4)O_(4)Zn(ZMOF2),were prepared.ZMOF1 and ZMOF2 were carbonized at 1000℃,forming CZMOF1 and CZMOF2,respectively.The specific surface area(S_(BET))of CZMOF2 was~2700 m^(2)g^(−1),much higher than that of CZMOF1(~1300 m^(2)g^(−1)).A supercapacitor electrode based on CZMOF2 achieved specific capacitances of 360,278,and 221 F g^(−1)at 50,250,and 1000 mA g^(−1)in an aqueous electrolyte(H2SO_(4)),respectively,the highest values reported to date for ZMOF-derived electrodes under identical conditions.The practical applicability of the CZMOF-based supercapacitor was verified in non-aqueous electrolytes.The initial capacitance retention was 78%after 100000 charge/discharge cycles at 10 A g^(−1).Crucially,the high capacitance of CZMOF2 arises from pore generation during carbonization.Below 1000℃,pore generation is dominated by the Zn/C ratio of ZMOFs,as carbon atoms reduce the zinc oxides formed during carbonization.Above 1000℃,a high O/C ratio becomes essential for pore generation because the oxygen functional groups are pyrolyzed.These findings will provide insightful information for other metal-based MOFderived multifunctional carbons.

关键词： metal-organic frameworks pore generation porous carbons supercapacitor zinc oxides

On the Function of Wall Sculpturing in Xylem Conduits

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Journal of Bionic Engineering 2009年第4期6卷 324-329页

作者： mika M.Kohonen se Helland Department of Physical Sciences University of HullCottingham RoadHU6 7RX UK

The water-conducting network of capillaries in vascular plants has evolved over hundreds of millions of years in order to be able to cope with bubble clogging,a problem which also affects modern microfluidic devices.Decades of anatomical studies have revealed that plants growing in habitats in which the formation of bubbles,or emboli,is likely to be a frequent occurrence often have various forms of geometrical sculpturing on the internal surfaces of the xylem conduits.The possible function of such wall sculpturing has long been the subject of speculation.We have investigated the hypothesis that wall sculpturing is a functional adaptation designed to increase the wettability of the walls of xylem conduits,an effect which could be described as the inverse of the well-known lotus-effect.Our results show that wall sculpturing does enhance wettability.Importantly,theoretical calculations reveal that the geometric parameters of various types of wall sculpturing are such that the resulting surfaces are sufficiently rough to enhance wettability,but not significantly rougher.The results provide an appealing answer to the long-standing debate on the function of wall sculpturing in xylem conduits,and may provide biomimetic clues for new approaches to the removal of bubbles in microfluidic channels.

关键词： xylem wettability capillary wall sculpturing bubble emboli microfluidic