Materials Literature
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This study concerns the characterization of platinum nickel (PtNi) and platinum vanadium (PtV) near-surface alloys (NSAs) for use as improved catalysts in proton exchange membrane hydrogen fuel cells. The need for this study arose in order to further understand the principles behind the predicted catalytic properties…
The combination of static strain aging and plastic strain reversal is important to understand for both the forming of components and also analysis of in service performance, for example, in the case of fabrication of pipeline, motor shafts or structural components in buildings and ships. Static strain aging phenomenon…
Human skin is a reservoir of various adult stem cell populations, among them multipotent precursor cells, which can differentiate into differing cellular lineages. These skin-derived precursor (SKP) cells can be isolated from pre-existing human primary fibroblast cultures with a newly developed stress-based method. Th…
Metal-organic frameworks (MOFs) or coordination polymers are one, two or three dimensional coordination networks, usually porous, comprising of metal ions linked together with one or more organic ligand or linker molecules having varied applications in the field of gas storage and separation, magnetism, catalysis etc.…
都市ガス雰囲気下におけるシール部材の劣化機構を明らかにするため，膜式ガスメーターの10年使用品，20年使用品および30年使用品を市場から回収し，それらの分解調査を行った。その結果，ガスメーター用途でのダイヤフラムの経年劣化の主要因は温度であり，ゴムの硬化・収縮により基布が引っ張られた結果，ダイヤフラムの周辺部に「しわ」が形成されることを見出した。この故障モードはダイヤフラムの破断や亀裂の発生よりもはるかに前段階であり，ダイヤフラムの物性や形状が一定量変化した時点であると考えられる。また，バルブシート用シール剤の経年劣化の主要因は，シール剤材料の組成変化（分解や酸化劣化など）でなく，その形状変化であることを見出した。実機を模擬した試…
Primer materials provide corrosion protection for metal parts as well as an increased adhesion between metallic substrates and thermal protection systems (TPSs). Current primers for use in cryogenic applications contain hexavalent chromium. This hexavalent chromium provides excellent corrosion protection even in a cry…
A better understanding of enzymatic hydrolysis mechanisms based on kinetics is required to develop reasonable conversion methods of cellulose for increasing productivity, such as effective biomass pretreatment and improved highly active enzymes. In this study, we aim to construct a basic equation for describing the ki…
Optically stimulated luminescence (OSL) from ordinary household salt has proven high potential for very low dose retrospective dosimetry. In the present paper other common place materials are considered and their dosimetric OSL-properties compared with household salt. The potential for assessment of the effective dose…
Actually platinum is still the most common metal catalyst in both anode and cathode fuel cell reactions because of its excellent properties in the adsorption and dissociation of small organics molecules (SOMs). The use of other alcohols with larger molecular weights has been investigated during the years and the direc…
The use of polymer brushes, terminally grafted polymer films, is a common method for modifying interfacial properties on range of substrates. The use of stimulus-responsive monomers allows the formation of brushes that change their conformation and physicochemical properties due to changes in, for example, solution pH…
For investigation, technical fibres extracted from flax Linum usitatissimum L. fibre variety planted in Croatia and from Slovenian autochthonous variety from Bela Krajina were used. Flax steams of fibre variety were subjected to water retting for 72 hours, but flax steams of seed variety were dew retted for 4 weeks. D…
Transparent conductive oxides used in solar cells such as indium tin oxide are relatively expensive. Zinc oxide may be suitable alternative as it is inexpensive, nontoxic, and abundant with properties similar to indium tin oxide. High quality zinc oxide films are commonly prepared by high cost vacuum techniques. Solut…
Sterilization of medical devices and packages is one of the major challenges in the biomedical field. In this study, we have developed antimicrobial material from poly(propylene carbonate) (PPC). PPC is a biodegradable polymer that is synthesized from copolymerization of renewable CO2 and propylene oxide (PO) with sup…
Efisiensi sel surya silikon monokristal komersial dengan struktur p-n junction tunggal (single junction) berkisar antara 16 - 18%. Nilai tersebut masih jauh dari batas puncak efisiensi teoritis untuk sel surya p-n junction tunggal, yaitu 30%. Untuk dapat mengoptimalkan potensi kinerja sel surya silikon monokristal den…
粘着特性の現象把握や物理的・化学的・機械的特性を明らかにするために，計測・分析・試験方法の高分解能化と高精度化を図った。本研究では，剥離試験時の剥離現象の観察や球転法による粘着特性の考察を実施し，さらにせん断特性試験の高分解能化と静的粘弾性特性の評価技術の開発を行った。試作した剥離現象観察装置により，アクリル系の粘着剤では架橋剤の添加量によって剥離点での粘着剤の変形状態が異なることを観察することができた。タック試験として使用されている球転法では，試験条件によっては，試験中の球の鋤起こし効果によって球の自重より大きな押しつけ力が粘着面に働くことが分かった。粘着剤の微小せん断変形特性の評価を目的として，最高分解能0.08nmで測定可能…
The topics of interests include Inorganic and Organic Chemistry, Material and Polymer Chemistry, Analytical and Forensic Chemistry, Environmental and Green Chemistry, Optics and Photonics, Solid State Physics, Nuclear and Radiation Physics, Pure and Applied Mathematics, Statistics and Probability and any other science…
Silica particles can be synthesized via condensation polymerization of a hydrolysed silica source such as trimethoxymethylsilane (TMOMS). Biomimetic silica particles are formed by using polyamines, such as polyethyleneimine (PEI). Negatively charged hydrolysed TMOMS molecules are attracted to positively charged nuclei…
Der Stromungsloser „ANSYS CFX – Release 15.0“, der nicht als Wellenloser konzipiert ist, wird hinsichtlich der Vorhersage der Wellenpropagation untersucht. Das grundsatzliche Ziel der Arbeit besteht in der Bestimmung spezifischer Rechenfehler bei der Prognose von Wellenausbreitung mit ANSYS CFX sowie deren Vergleich m…
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space grou…
The Logistics Reduction and Repurposing project includes the heat melt compactor (HMC), a device that compacts waste containing plastic into a tile that will minimize volume, and may be used as materials for radiation shielding. During the process, a small purge gas stream is directed through the HMC chamber to transp…