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Preparation of high dispersion and high performance PtRu/CNTs catalyst by an organic colloid method

中国与非洲·英文版 2020年第1期

作者： paulo Mendes

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电池 2006年第5期36卷 371-374页

作者：王宁卡特刘军民廖世军 v.Birss 华南理工大学化学科学学院 Depart ment of Chemistry Universityof CalgaryCalgaryCanada

A high dispersion and high performance PtRu catalyst supported on carbon nanotubes was prepared by an organic colloid method. The particle size of the active components could be as small as 1.0 nm, the active surface area was about 466 m~2g (Pt). The catalytic activity toward anodic oxidation of methanol was about 3～4 times higher than that of Johnson Matthey PtRu/XC-72R catalyst. The single testing showed that the performance of the prepared catalyst was higher than that of the commercial one.

关键词： PtRu/CNTs organic colloidal method direct methanol fuel cell(DMFC)

Xanthan Gum—Bio-Based Raw Material for Wood Adhesive

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Green and Sustainable Chemistry 2023年第2期13卷 153-161页

作者： Ravindra v. Gadhave Super Bond Adhesives Private Limited Thane India

Due to their lower environmental impact, ease of accessibility, low cost, and biodegradability, bio-renewable sources have been used extensively in the last several decades to synthesize adhesives, substituting petrochemical-based adhesive. vegetable oils (including palm, castor, jatropha, and soybean oils), lactic acid, potato starch, and other bio-renewable sources are all excellent sources for the synthesis of adhesives that are being taken into consideration for the synthesis of “eco-friendly” adhesives. Due to their widespread use, accessibility, affordability, and biodegradability, biobased raw materials like carbohydrates used to synthesize wood and wood composite adhesive have gradually replaced petrochemical-based adhesive. Recently, xanthan gum, a naturally occurring polymer, has drawn the interest of scientists as a potentially petroleum source replacement. It possesses specific rheological characteristics, excellent water solubility, and stability to heat, and can be used as a binder, thickener, suspending agent, and stabilizer. Xanthan gum increases the adhesive strength in addition to increasing the viscosity of water-soluble adhesives. This article discusses xanthan gum as a potential substitute for traditional raw materials derived from petroleum that is used as a raw material for adhesives.

关键词： Xanthan Gum Bio-Polymer Adhesive Wood Carbohydrates

Energy Spectrum of Turbulent velocity Pulsations at Arbitrary values of Fluid viscosity

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Journal of Modern Physics 2020年第10期11卷 1502-1513页

作者： Edward v. Teodorovich Ishlinsky Institute for Problems in Mechanics Russian Academy of Sciences Moscow Russia

The problem of calculating the energy spectrum of turbulent velocity pulsations in the case of homogeneous isotropic and stationary turbulence is considered. The domain of turbulent energy production is treated as “a black box” on which boundary the spectral energy flux is given. It is assumed that the spectrum is formatted due to intermodal interactions being local in the wave-number space that leads to a cascade mechanism of energy transfer along the wave-number spectrum and the possibility of using the renormalization-group method related to the Markovian features of the process under consideration. The obtained formula for energy spectrum is valid in a wide wave-number range and at arbitrary values of fluid viscosity. It is shown that in functional formulation of the statistical theory of turbulence, the procedure of separating local intermodal interactions, which govern energy transfer (straining effect), and filtering out nonlocal interactions, which have no influence on energy transfer (sweeping effect), is directly described without providing additional arguments or conjectures commonly used in the renormalization-group analysis of turbulent spectra.

关键词： Spectral Flux Spectral Energy Density Local and Nonlocal Interactions Inertial Term Renormalization-Group Invariance Epsilon-Expansion Procedure

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沿阿穆尔板块西边界的活动断层(蒙古领土)

地学前缘 2022年第1期29卷 245-265页

作者： vladimir A.SANKOv Anna v.PARFEEvETS Andrey I.MIROSHNITCHENKO Aleksey v.SANKOv Amgalan BAYASGALAN Sodnomsambuu DEMBEREL Institute of the Earth’s Crust Siberian Branch of the Russian Academy of SciencesIrkutsk 664033Russia Irkutsk State University Irkutsk 664003Russia Institute of Astronomy and Geophysics of the Mongolian Academy of Sciences Ulaanbaatar 51Mongolia

阿穆尔板块西部边界在蒙古境内的空间位置尚不清楚,并且活动断层构造及其沿线地壳的应力状态研究较少。本文在沿此边界的三个区域——杭爱—肯特构造鞍部、布尔古特地块(鄂尔浑—土拉交汇处)和色楞格地块(包括色楞格凹陷和布伦—努鲁隆... 详细信息

阿穆尔板块西部边界在蒙古境内的空间位置尚不清楚,并且活动断层构造及其沿线地壳的应力状态研究较少。本文在沿此边界的三个区域——杭爱—肯特构造鞍部、布尔古特地块(鄂尔浑—土拉交汇处)和色楞格地块(包括色楞格凹陷和布伦—努鲁隆起),利用空间图像解译、地形起伏度分析、地质构造资料以及构造压裂和沿裂缝位移资料重建构造古应力,对活动断层进行研究。研究表明,活动断裂继承了古生代和中生代古构造的非均质性。这些断层沿着板块边界并不是单一的带,而是成簇的。它们的运动取决于走向:亚纬向断层是具有一定逆分量的左旋走滑断层,北西向断层是逆断层或逆冲断层,通常具有右旋走滑分量,海底断层是右旋走滑断层,北东向断层是正断层。位于色楞格凹陷和杭爱东部的断裂构造的活动始于上新世。逆断层和走滑断层与上新世情况不符,但多与更新世地貌相符,表明其活动年代较晚,为更新世时期。利用构造断裂和沿断裂的位移,重建活动断裂带变形末阶段的应力应变状态,结果表明断裂在最大挤压轴的北北东和北东方向上以压缩和走滑为主。只有在色楞格凹陷内,以扩张和走滑类型的应力张量为主,且在最小挤压轴的北西走向尤为显著。在南部,杭爱东部(鄂尔浑地堑)内有1个以扩张机制为主的局部区域,说明蒙古中部断裂在更新世—全新世阶段的活动以及现代地震活动主要受与印度斯坦和欧亚大陆汇聚过程相关的东北方向的附加水平挤压的控制。使研究区地壳产生走滑变形、贝加尔湖裂谷发散活动以及阿穆尔板块东南运动的另一个因素是东南方向软流圈流动对岩石圈底部的影响。阿穆尔板块和蒙古地块之间的边界在构造结构上是零碎的,代表了覆盖整个蒙古西部变形带的边缘部分。

关键词：活动断层古应力状态断层运动学碰撞的远程效应阿穆乐板块蒙古

Lactic Acid-Sustainable Raw Material for Biodegradable Hot Melt Adhesive: Review

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Open Journal of Organic Polymer Materials 2022年第3期12卷 31-45页

作者： Ravindra v. Gadhave Super Bond Adhesives Private Limited Thane India

Currently, due to scarcity of hydrocarbon resources and the extensive use of water based, solvent based and hot melt adhesives in wood bonding in furniture industries and packaging industries that demand recyclability, compostability and bio-degradability, recently attention has been concentrated to making these formulations completely bio-based, sustainable and biodegradable. Biodegradable hot melt adhesives (HMAs) prepared from natural sources have a potential for use in furniture and packaging industries because of an increase in awareness of environmental issues, the replacement of conventional petroleum-derived hydrocarbon raw materials by renewable, biodegradable and sustainable materials has developed. In terms of environmental issues, such as climate crisis due to an increase of carbon dioxide emission, attempts have been made to produce HMAs using non-hydrocarbon resins, such as polylactic acid (PLA)-based resins, containing no petroleum as a raw material. Polylactic acid was prepared by self-condensation reactions of lactic acid or by lactide ring opening polymerisation, and used for packaging materials, sanitary pads, diapers etc., especially adhesives owing to its excellent processability and the excellent mechanical properties of its HMAs products. Therefore, recently the use of PLA materials as a substitute for non-biodegradable hydrocarbon-based polymers can be considered to be environmentally favourable. Here, we discussed the various uses of PLA as a sustainable and bio-degradable and sustainable hot melt adhesive.

关键词： Lactic Acid Hot Melt Sustainable Bio-Degradable Adhesive

Nonlocal Theory of the Photon Gas Evolution Beginning from the Planck Time

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Journal of Applied Mathematics and Physics 2022年第5期10卷 1443-1460页

作者： Boris v. Alexeev Russian State Technological University Moscow Russia

Evolution of the photon gas (PG) in the Planck period is considered as a particular case of the physical vacuum (Pv) hydrodynamics. Nonlocal quantum hydrodynamic equations are applied for calculation of the photon gas evolution. In general case, PG hydrodynamics contains gravitation in the explicit form. Exact analytical solutions of PG hydrodynamics are obtained. Solutions show the exponential growth of gradient values for internal energy in time and space. In comparison with phenomenological General Relativistic Theory, Nonlocal quantum hydrodynamics (NQH) does not lead to contradictions in all limit cases. Theory of physical vacuum and the theory of photonic gas are related theories. These theoretical (analytical!) results confirm the result of direct observations (Arno Alan Penzias and Robert Woodrow Wilson, Nobel Prize (1978) for their discovery of cosmic microwave background;John C. Mather and George F. Smoot. Nobel Prize (2006) for their discovery of the blackbody form and anisotropy of the cosmic microwave background radiation).

关键词： Nonlocal Physics Physical vacuum Photon Gas Evolution after Big Bang Transport Processes in Physical vacuum Cosmic Microwave Background Anisotropy of the Cosmic Microwave Background Radiation

Formation of Diffuse and Spark Discharges in Nonuniform Electric Field in Elevated Pressure Gases

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高电压技术 2013年第9期39卷 2105-2111页

作者： v. F. Tarasenko E. Kh. Baksht A. G. Burachenko M. v. Erofeev Institute of High Current Electronics Russian Academy of Sciences Siberian Branch 634055 Tomsk Russia

Diffuse and spark discharges are formed and studied during breakdowns with nonuniform electric field in nitrogen,air,and argon at elevated pressures and pulse repetition frequency of 400 ***-polarity voltage pulses of the amplitude 20 kv,width at the base of 15 ns and rise time of 2 ns are applied to the electrode with a small radius of *** the conditions of generation of runaway electron beams and X-rays,a CCD camera records the time of the diffuse discharge formation and its duration prior to its transition to a spark *** all three gases,the diffuse discharge is formed during the time not exceeding 1 ns,when the bright spots appear on cathode in argon and air resulting in the beginning of the spark channel propagation.

关键词：火花放电不均匀电场高压气体脉冲重复频率上升时间 CCD照相机电压脉冲曲率半径

Philippine retinoblastoma initiative multi-eye center study 2010-2020

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International Journal of Ophthalmology(English edition) 2024年第1期17卷 144-156页

作者： Roland Joseph D.Tan Gary John v.Mercado Patricia E.Cabrera Paulita Pamela P.Astudillo Rolando Enrique D.Domingo Josept Mari S.Poblete Charmaine Grace M.Cabebe Adriel vincent R.Te Melissa Anne S.Gonzales Jocelyn G.Sy Beltran Alexis A.Aclan Jayson T.So Fatima G.Regala Kimberley Amanda K.Comia Josemaria M.Castro Mara Augustine S.Galang Aldous Dominic C.Cabanlas Benedicto Juan E.Aguilar Gabrielle S.Evangelista Jo Michael Maniwan Andrei P.Martin Calvin Y.Martinez John Alfred H.Lim Rena Ivy Bascuna Rachel M.Ng Kevin B.Agsaoay Kris Zanna A.Acluba-Arao Ellaine Rose v.Apostol Beatriz M.Prieto Department of Ophthalmology and visual Sciences Philippine General HospitalManila 1000Philippines Department of Ophthalmology Baguio General Hospital and Medical CenterBaguio City 2600Philippines Department of Ophthalmology Manila Doctors HospitalManila 1000Philippines Department of Ophthalmology Rizal Medical CenterPasig City 1600Philippines Department of Ophthalmology Jose B.Lingad Memorial Regional HospitalPampanga 2000Philippines Department of Ophthalmology Southern Philippines Medical CenterDavao City 8000Philippines Department of Ophthalmology East Avenue Medical CenterQuezon City 1100Philippines Department of Ophthalmology Northern Mindanao Medical CenterCagayan de Oro City 9000Philippines Department of Ophthalmology Cebu Velez General HospitalCebu City 6000Philippines Legazpi Eye Center Legazpi City 4500Philippines Department of Ophthalmology Cagayan Valley Medical CenterTuguegarao City 3500Philippines

AIM:To provide a comprehensive and more representative national data on the disease,especially on treatment options and outcomes,and to determine access of retinoblastoma patients from Luzon,visayas and Mindanao to eye care,and determine if access is associated with delay in consultation,staging and ***:Cohort study of retinoblastoma patients seen in eleven institutions located in the three major areas of the Philippines namely Luzon,vizayas and Mindanao from ***:Totally 636 patients,involving 821 eyes,were ***(57%)were from Luzon and were seen in institutions in Luzon(72%).Annually,58±10 new cases were seen with 71%having unilateral *** delay of consultation remained long at 9(3,17)mo,longest in patients with unilateral disease(Pvisayas(Pional Retinoblastoma Staging System,only 35%of patients had Stage 1 while 47%already had extraocular *** was the most common treatment received by 484 patients while intravenous chemotherapy was received by *** were 250(39%)patients alive,195(31%)dead,85(13%)abandoned,17(3%)refused and 89(14%)with no ***:This study presents the largest cohort of retinoblastoma patients in the Philippines in terms of patients’and participating institutions’number and geographical location and type of institution(private and public).It also presents more comprehensive data on the treatments used and outcomes(survival,globe salvage,and vision retention rates).Delay in consultation was still long among patients leading to advanced disease stage and lower survival *** increasing capacity to diagnose and manage retinoblastoma in the country,the delay of consultation remains long primarily due to accessibility issues to eye care institutions especially in the visayas and financial *** delay was still significant that overall survival rate remain low.

关键词： retinoblastoma Philippines clinical profile

The Coal’s Layer Temperature Regime under Conditions of Heat Removal of Absorbed Microwave Energy by Radiation and Convection Simultaneously

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Journal of Computer and Communications 2018年第1期6卷 229-238页

作者： v. A. Karelin vl. v. Salomatov vas. v. Salomatov Institute of Thermal Physics Siberian Branch of the Russian Academy of Sciences Novosibirsk Russia Physics Department Novosibirsk National Research State University Novosibirsk Russia

Coal is one of the most popular sources of energy. However, it has a relatively low energy efficiency due to high humidity and a greater release of harmful substances during combustion. On the other hand, the coal reserve on earth is estimated at 500 years and the cost is relatively low. This causes the search for new ways of processing coal. One way to efficiently process coal, while reducing the humidity and content of harmful components is microwave treatment. The basic information for microwave exposure to coal is the temperature field. In this paper, an approximate-analytically nonlinear mathematical model for heating a flat coal mass is studied, provided that the absorbed microwave energy is removing by heat radiation and convection simultaneously.

关键词： Coal Microwave Temperature Distribution Stefan–Boltzmann Law Convection