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Effect of ethanedioic acid functionalization on Ni/Al_2O_3 catalytic hydrodeoxygenation and isomerization of octadec-9-enoic acid into biofuel: kinetics and Arrhenius parameters

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Journal of Energy Chemistry 2016年第1期25卷 158-168页

作者： Olumide Bolarinwa Ayodele Kallidanthiyil Chellappan Lethesh Zahra Gholami yoshimitsu uemura Centre for Biofuel and Biochemical Research Universiti Teknologi PETRONAS Department of Chemical Engineering Faculty of Engineering University of Malaya Centralized Analytical Laboratory Universiti Teknologi PETRONAS

The effect of ethanedioic acid（Ed A） functionalization on Al2O3 supported Ni catalyst was studied on the hydrodeoxygenation（HDO）, isomerization, kinetics and Arrhenius parameters of octadec-9-enoic acid（OA） into biofuel in this report. This was achieved via synthesis of two catalysts; the first, nickel alumina catalyst（Ni/Al2O3） was via the incorporation of inorganic Ni precursor into Al2O3; the second was via the incorporation nickel oxalate（Ni Ox） prepared by functionalization of Ni with Ed A into Al2O3 to obtain organometallic Ni Ox/Al2O3 catalyst. Their characterization results showed that Ni species present in Ni/Al2O3 and Ni Ox/Al2O3 were 8.2% and 9.3%, respectively according to the energy dispersive X-ray result. Ni Ox/Al2O3 has comparably higher Ni content due to the Ed A functionalization which also increases its acidity and guarantees high Ni dispersion with weaker metal-support-interaction leading to highly reducible Ni as seen in the X-ray diffraction, X-ray photoelectron spectroscopy, TPR and Raman spectroscopy results. Their activities tested on the HDO of OA showed that Ni Ox/Al2O3 did not only display the best catalytic and reusability abilities, but it also possesses isomerization ability due to its increased acidity. The Ni Ox/Al2O3 also has the highest rate constants evaluated using pseudo-first-order kinetics,but the least activation energy of 176 k J/mol in the biofuel formation step compared to 244 k J/mol evaluated when using Ni/Al2O3. The result is promising for future feasibility studies toward commercialization of catalytic HDO of OA into useful biofuel using organometallic catalysts.

关键词： Octadec-9-enoic acid Hydrodeoxygenation Isomerization Nickel oxalate Biofuel

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Cultivation of microalgae for biodiesel production:A review on upstream and downstream processing

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Chinese Journal of Chemical Engineering 2018年第1期26卷 17-30页

作者： Xin Bei Tan Man Kee Lam yoshimitsu uemura Jun Wei Lim Chung Yiin Wong Keat Teong Lee Chemical Engineering Department Universiti Teknologi PETRONAS Centre for Biofuel and Biochemical Research Universiti Teknologi PETRONAS Fundamental and Applied Science Department Universiti Teknologi PETRONAS School of Chemical Engineering Universiti Sains MalaysiaEngineering Campus

Fluctuating market price of fossil fuel and overwhelming emission of greenhouse gases to the atmosphere have resulted in climate change and have been a global concern in this decade. Hence, biodiesel has become an alternative option to fossil diesel as it is renewable and environmentally friendly. Nevertheless, this alternative fuel that is usually derived from terrestrial oil crops will cause shortage in food supply and deforestation if mass production is realized. In recent years, cultivation of aquatic microorganism(particularly microalgae) to produce biodiesel is considered as a practical solution due to their high growth rate and ability to synthesize large quantity of lipid within their cell. However, the development of energy and cost-efficiency of microalgae cultivation system are the main issues in producing renewable microalgae biodiesel. Of late, wastewater or organic compost has been used as the cultivation medium as it can provide sufficient nutrients to sustain microalgae *** cultivation method and system are vitally important as these factors undoubtedly affect the final microalgae biomass and lipid yield. In this review, the cultivation system of microalgae, nutrients demanded for microalgae production, cell harvesting and drying, microalgae oil extraction, and utilization of microalgae biomass for biodiesel production are introduced and discussed. It is anticipated to convey clearer perspectives in upstream and downstream processes in microalgae-derived biodiesel production.

关键词：耕作系统生产上游评论类脂化合物生物资源气候变化温室气体

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High Temperature Separation of Hydrogen from Mixture of Gases by Using Microporous Silica Membranes

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材料科学与工程（中英文B版） 2011年第1期1卷 90-96页

作者： Sajid Hussain Shah yoshimitsu uemura SuzanaYusup Katsuki Kusakabe Department of Chemical Engineering Universiti Teknologi PETRONAS Bander Seri Iskandar Tronoh 31750 Malaysia Department of Living Environmental Science Fukuoka Women＇s University 1-1-1 Kasumigaoka Higashi-ku Fukuoka 813-8529Japan

This paper presents a review on the aspect of using microporous silica membranes for the separation of hydrogen from process streams. It includes an overview of recent literature and advancement and hurdles for hydrogen separation from mixture of gases. Ceramic membranes derived both from sol-gel and chemical vapor deposition (CVD) methods were discussed and compared their properties, preparation and performance in gas separation at an elevated temperature in the presence of steam or vapors.

关键词：气体分离性能二氧化硅膜高温蒸汽微孔混合氢化学气相沉积分离过程

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Simultaneous harvesting and cell disruption of microalgae using ozone bubbles:optimization and characterization study for biodiesel production

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Frontiers of Chemical Science and Engineering 2021年第5期15卷 1257-1268页

作者： Wan N.A.Kadir Man K.Lam yoshimitsu uemura Jun W.Lim Peck L.Kiew Steven Lim Siti S.Rosli Chung Y.Wong Pau L.Show Keat T.Lee Chemical Engineering Department Universiti Teknologi PETRONASSeri Iskandar32610Malaysia HICoE-Centre for Biofuel and Biochemical Research Institute of Self-Sustainable BuildingUniversiti Teknologi PETRONASSeri Iskandar32610Malaysia NPO Kuramae Bioenergy Tokyo108-0023Japan Fundamental and Applied Sciences Department Universiti Teknologi PETRONASSeri Iskandar32610Malaysia Faculty of Engineering Technology&Built EnvironmentUniversity College Sedaya InternationalCheras Kuala Lumpur56000Malaysia Department of Chemical Engineering Lee Kong Chian Faculty of Engineering and ScienceUniversiti Tunku Abdul RahmanSungai LongSelangor43000Malaysia Department of Chemical and Environmental Engineering Faculty of Science and EngineeringUniversity of Nottingham MalaysiaSemenyih43500Malaysia School of Chemical Engineering Universiti Sains MalaysiaEngineering CampusNibong Tebal14300Malaysia

In the present study, ozone was introduced as an alternative approach to harvest and disrupt microalgae cells (Chlorella vulgaris) simultaneously for biodiesel production. At the optimum ozonation conditions (6.14 g·h^(−1) ozone concentration, 30 min ozonation time, 1 L·min^(−1) of ozone flowrate at medium pH of 10 and temperature of 30℃), the sedimentation efficiency of microalgae cells increased significantly from 12.56% to 68.62%. It was observed that the microalgae cells aggregated to form flocs after pretreated with ozone due to the increment of surface charge from −20 to −6.59 mV. Besides, ozone had successfully disrupted the microalgae cells and resulted in efficient lipid extraction, which was 1.9 times higher than the control sample. The extracted microalgae lipid was mainly consisted of methyl palmitate (C16:0), methyl oleate (C18:1) and methyl linolenate (C18:3), making it suitable for biodiesel production. Finally, utilization of recycled culture media after ozonation pre-treatment showed robust growth of microalgae, in which the biomass yield was maintained in the range of 0.796 to 0.879 g ·h^(−1) for 5 cycles of cultivation.

关键词： microalgae biodiesel ozonation pre-treatment lipid

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Statin as a therapeutic agent in gastroenterological cancer

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World Journal of Gastrointestinal Oncology 2022年第1期14卷 110-123页

作者： Norio uemura Hiromitsu Hayashi Hideo Baba Department of Gastroenterological Surgery Graduate School of Medical SciencesKumamoto UniversityKumamoto 860-8556Japan

Statins inhibit 3-hydroxy-3-methylglutaryl-CoA reductase,the rate-limiting enzyme of the mevalonate pathway,and are widely used as an effective and safe approach handle *** mevalonate pathway is a vital metabolic pathway that uses acetyl-CoA to generate isoprenoids and sterols that are crucial to tumor growth and *** studies have indicated that statins improve patient prognosis in various *** research on the mechanisms underlying the antitumor effects of statins is *** development of new anti-cancer drugs is progressing,but increasing medical costs from drug development have become a major *** available,inexpensive and well-tolerated drugs like statins have not yet been successfully repurposed for cancer *** the cancer patients that may benefit from statins is key to improved patient *** review summarizes recent advances in statin research in cancer and suggests important considerations for the clinical use of statins to improve outcomes for cancer patients.

关键词： Statin HMG CoA reductase inhibitor Mevalonate pathway Cancer

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On Exit Time from Balls of Jump-type Symmetric Markov Processes

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Acta Mathematica Sinica,English Series 2010年第1期26卷 185-192页

作者： Toshihiro uemura Department of Mathematics Faculty of Engineering Science Kansai University

We obtain upper and lower bounds of the exit times from balls of a jump-type symmetric Markov process. The proofs are delivered separately. The upper bounds are obtained by using the Levy system corresponding to the process, while the precise expression of the （L^2-）generator of the Dirichlet form associated with the process is used to obtain the lower bounds.

关键词： symmetric Dirichlet form jump-type Markov process Levy system exit times from balls

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Appropriate Heart Rate in a Patient with Repaired Tetralogy of Fallot

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Congenital Heart Disease 2022年第6期17卷 647-652页

作者： Aya Miyazaki Hideki uemura Yasuyo Takeuchi Junya Tomida Yasuo Ono Yoshifumi Fujimoto Norie Mitsushita Akio Ikai Department of Transitional Medicine Division of Congenital Heart DiseaseShizuoka General HospitalShizuokaJapan Congenital Heart Disease Center Nara Medical UniversityKashiharaJapan Department of Cardiology Shizuoka General HospitalShizuokaJapan Department of Clinical Engineering Shizuoka General HospitalShizuokaJapan

Appropriate heart rate in a failing pulmonary ventricle remains unknown, particularly in congenital heart diseasewith unique hemodynamics. A 71-year-old male with repaired tetralogy of Fallot and a pacemaker for a sinusnode dysfunction suffered from heart failure symptoms with preserved left ventricular function. Simply changingthe pacemaker’s lower rate from 60 to 75 bpm, New York Heart Association classification improved from III to II,and hemodynamic parameters drastically improved. We regarded this case as informative. Appropriate heart ratecould be higher in congenital patients with failing right and non-failing left ventricles than in adults with malfunctioningLV.

关键词： Heart rate repaired tetralogy of Fallot failing right ventricle pacemaker lower rate the right-left ventricular interaction

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Eastern Asian endemic seed plant genera and their paleogeographic history throughout the Northern Hemisphere

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Journal of Systematics and Evolution 2009年第1期47卷 1-42页

作者： Steven R.MANCHESTER Kazuhiko uemura Florida Museum of Natural History University of Florida National Museum of Nature and Science

We review the fossil history of seed plant genera that are now endemic to eastern Asia. Although the majority of eastern Asian endemic genera have no known fossil record at all, 54 genera, or about 9%, are reliably known from the fossil record. Most of these are woody (with two exceptions), and most are today either broadly East Asian, or more specifically confined to Sino-Japanese subcategory rather than being endemic to the Sino-Himalayan area. Of the "eastern Asian endemic" genera so far known from the fossil record, the majority formerly occurred in Europe and/or North America, indicating that eastern Asia served as a late Tertiary or Quaternary refugium for taxa. Hence, many of these genera may have originated in other parts of the Northern Hemisphere and expanded their ranges across continents and former sea barriers when tectonic and climatic conditions al- lowed, leading to their arrival in eastern Asia. Although clear evidence for paleoendemism is provided by the gymnosperms Amentotaxus, Cathaya, Cephalotaxus, Cunninghamia, Cryptomeria, Glyptostrobus, Ginkgo, Ketel-eeria, Metasequoia, Nothotsuga, Pseudolarix, Sciadopitys, and Taiwania, and the angiosperms Cercidiphyllum, Choerospondias, Corylopsis, Craigia, Cyclocarya, Davidia, Dipelta, Decaisnea, Diplopanax, Dipteronia, Em-menopterys, Eucommia, Euscaphis, Hemiptelea, Hovenia, Koelreuteria, Paulownia, Phellodendron, Platycarya, Pteroceltis, Rehderodendron, Sargentodoxa, Schizophragma, Sinomenium, Tapiscia, Tetracentron, Toricellia, Trapella, and Trochodendron, we cannot rule out the possibility that neoendemism plays an important role especially for herbaceous taxa in the present-day flora of Asia, particularly in the Sino-Himalayan region. In addition to reviewing paleobotanical occurrences from the literature, we document newly recognized fossil occurrences that expand the geographic and stratigraphic ranges previously known for Dipelta, Pteroceltis, and Toricellia.

关键词： Cretaceous eastern Asia endemic paleobotany phytogeography Tertiary

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Unfamiliar waveforms spanning from the ST to TP segments only observed in certain limb leads of the standard 12-lead electrocardiogram due to Aslanger’ s sign

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老年心脏病学杂志:英文版 2023年第9期20卷 693-696页

作者： Koji Takahashi Nobuhisa Yamamura Mako Yoshino Daijiro Enomoto Hiroe Morioka Shigeki uemura Takafumi Okura Tomoki Sakaue Shuntaro Ikeda Department of Community Emergency Medicine Ehime University Graduate School of MedicineEhimeJapan Department of Cardiology Yawatahama City General HospitalEhimeJapan Department of Clinical Pathology Yawatahama City General HospitalEhimeJapan

Aslanger’s sign,also known as the arterial pulse tapping artifact or electromechanical association artifact,is an electrocardiographic artifact caused by arterial pulsation at the site where the limb leads of the standard 12-lead electrocardiogram near the radial or posterior tibial arteries are positioned,particularly in hyperdynamic states.[1–8]It occurs in every cardiac cycle with a constant coupling interval between the QRS complex and *** synchronization with the underlying heart rhythm makes it less likely to be recognized as an artifact compared to unsynchronized artifacts,such as those caused by limb movement and inadequate contact between the electrode and skin.[1,2,7,8]Almost all reported cases of Aslanger’s sign exhibit an unusual waveform morphology in all 12 leads except one of the standard 12-lead *** sign is often confused with an electrocardiographic finding commonly observed during acute coronary events.

关键词： electrocardiogram arterial likely

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Light chain cardiac amyloidosis in a nonagenarian

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Journal of Geriatric Cardiology 2022年第1期19卷 83-89页

作者： Koji Takahashi Mina Yamashita Tomoki Sakaue Daijiro Enomoto Shigeki uemura Takafumi Okura Shuntaro Ikeda Takanori Senba Akira Saijo Nobuhisa Yamamura Sohei Kitazawa Department of Community Emergency Medicine Ehime University Graduate School of MedicineEhimeJapan Department of Cardiology Yawatahama City General HospitalEhimeJapan Department of Hematology Yawatahama City General HospitalEhimeJapan Department of Clinical Pathology Yawatahama City General HospitalEhimeJapan Department of Molecular Pathology Ehime University Graduate School of MedicineEhimeJapan

Cardiac amyloidosis is an infiltrative and restrictive cardiomyopathy caused by the extracellular deposition of amyloid fib-rils within the heart as systemic amyloidosis,lead-ing to heart failure,reduced quality of life,and death.[1]There are two major amyloid fibril proteins that af-fect the heart:amyloid immunoglobulin light chain(AL)and amyloid transthyretin(ATTR).The latter is further subdivided into wild-type ATTR and variant types based on the presence of a mutation in the transthyretin gene.

关键词： amyloid death. cardiomyopathy

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