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137 results for “Hydrogen (H2)”
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Research ArticleOpen accessEvery word in the titleSensitization of Photohemolysis by a New Extraction from Flowers and Aerial Parts of Cichorium Pumilum Jacq: Effects of Inulin and Hydrogen PeroxideM-Ali H. Al-Akhras, Amr Amin, Karima Mohammad et al.Addition of inulin and hydrogen peroxide to new photosensitizers extracted from the flowers and aerial parts of the chicory (Cichorium Pumilum Jacq) have been investigated. Some of the isolated photosensitizers remain unidentified compounds. Chicory extracts are found to be dependent on light and temperature. Higher photohemolysis rate was noticed under the influence of light as compared to temperature. The effect … …American Journal of Pharmacology and Toxicology, Vol. 2, Issue 2 · 30 Jun 2007 · 7,716 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleA Quasi One-dimensional Simulation of a 4 Stroke Spark Ignition Hydrogen Fuelled EngineT. F. Yusaf, M. Z. Yusoff, I. Hussein, S. H. FongActive research and development of hydrogen-fuelled engine had been done for a few decades since hydrogen serves as a potential of infinite fuel supply. This paper discussed analytically and provides data on effects of compression ratio, equivalence ratio and spark timing of a hydrogen-fuelled engine as a guideline for the engine design. The change in the thermodynamic properties of the … …American Journal of Applied Sciences, Vol. 2, Issue 8 · 31 Aug 2005 · 6,886 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleHydrogen Peroxide Biosensor Based on the Direct Electrochemistry of Myoglobin Immobilized in Poly-3-Hydroxybutyrate FilmXiang Ma, Rongwu Yang, Genxi LiDirect electrochemistry of myoglobin (Mb) was observed in a stable film composed of a natural lipid polymer (poly-3-hydroxybutyrate) and Mb, the film of which was modified on a pyrolytic graphite electrode. The apparent formal potential of Mb was at about -260 mV in an acetate buffer solution with pH 5.0. Moreover, Mb in the polymer film exhibited catalytic activity towards … …American Journal of Biochemistry and Biotechnology, Vol. 1, Issue 1 · 31 Mar 2005 · 6,872 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleEffect of Cathodically Charged Hydrogen on the Microhardness of Pure CopperGhazi S. AL-Marahleh, Amjad S. El-AmoushThe effect of hydrogen on the microhardness of pure copper was investigated after experiments conducted on specimens that hydrogen charged under different cathodic charging conditions. Microhardness measurements revealed that the introduction of hydrogen caused hardening on the surface of copper. The severity of the hardened region increased with either cathodic current density or charging time. Further charging increased the depth … …American Journal of Applied Sciences, Vol. 2, Issue 2 · 28 Feb 2005 · 7,280 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleOn Micromechanisms of Hydrogen Plastification and Embrittlement of Some Technological MaterialsYu. S. Nechaev, T. N. VezirogluSome fundamental problems of revealing micromechanisms of hydrogen plastification, superplasticity, embrittlement, cracking, blistering and delayed fracture of some technologically important industrial metallic materials are formulated. The ways are considered of these problems' solution and optimizing the technological processes and materials, particularly in the hydrogen and gas-petroleum industries, some aircraft, aerospace and automobile systems. …American Journal of Applied Sciences, Vol. 2, Issue 1 · 31 Jan 2005 · 6,864 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleOne can Achieve the Nuclear Fission Reaction of Lithium by Accelerated Hydrogen Nuclei or NeutronsRelly Victoria Virgil Petrescu, Florian Ion Tiberiu PetrescuThe idea circulated among physicists that in the upper area of the physical elements the fission reaction can be obtained and in the lower one the fusion reaction occurs. In the presented paper we want to impose another rule, namely the obtaining in the lower part of the physical elements of the fission and fusion nuclear reactions, with the obvious … …American Journal of Engineering and Applied Sciences, Vol. 14, Issue 3 · 7 Sep 2021 · 9,516 accessesView PDFCite
Review ArticleOpen accessEvery word in the titleSolid State Hydrogen Storage in Polymeric Materials: A ReviewRolando PediciniHydrogen storage is one of the major obstacles to overcoming so that hydrogen becomes next fuel and/or energy carrier of the future. The hydrogen storage materials are one of the principal challenges that must be met before the development of a hydrogen economy. Among all materials studied an important class that could have a future, in particular in portable applications, … …Energy Research Journal, Vol. 8, Issue 2 · 7 Aug 2017 · 7,079 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleMedia Improvement for Hydrogen Production Using C. acetobutylicum NCIMB 13357Mohd Sahaid Kalil, Hisham Salem Saleh Alshiyab, Wan Mohtar Wan YusoffProblem statement: Some component of fermentation medium showed to reduce the bacterial production of hydrogen. Approach: Reinforced clostridium medium is a selected medium for Clostridium species. Reformulation this medium regarding hydrogen production may focus on such medium composition that enhance or reduce the bacterial productivity. The optimum pH and temperature for hydrogen production were at initial pH of 7.0 and … …American Journal of Applied Sciences, Vol. 6, Issue 6 · 30 Jun 2009 · 7,255 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleTrace Metal Effect on Hydrogen Production Using C.acetobutylicumHisham Alshiyab, Mohd Sahaid Kalil, Aidil Abdul Hamid, Wan Mohtar Wan YusoffThis study was carried out to study the effect of trace metal addition for hydrogen production The results show that this bacterial need a selected nutrient with selected concentration. The optimum parameters for cultivation were at initial pH of 7.0 and temperature of 30°C. Trace metal addition to the new medium showed that only iron enhanced the H2 yield. The … …OnLine Journal of Biological Sciences, Vol. 8, Issue 1 · 31 Mar 2008 · 7,635 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleInvestigation of the Photoheterotrophic Hydrogen Production of Rhodobacter sphaeroides KCTC 1434 using Volatile Fatty Acids under Argon and Nitrogen HeadspaceRuby Lynn G. Ventura, Jey-R S. Ventura, Young-Sook OhIn this study, the photo fermentative H2 production of Rhodobacter sphaeroides KCTC 1434 was investigated using acetate, propionate and butyrate under argon and nitrogen headspace gases. The highest H2 yield and Substrate Conversion Efficiency (SCE) were observed from butyrate (8.84 mol H2/mol butyrate consumed, 88.42% SCE) and propionate (6.10 mol H2/mol propionate consumed, 87.16% SCE) under Ar headspace. Utilization of … …American Journal of Environmental Sciences, Vol. 12, Issue 6 · 30 Nov 2016 · 9,058 accessesView PDFCite