Materials Literature
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Hydrocracking (HC) catalysts consisting mainly of silica-alumina and a small amount of ultra stable Y type (USY) zeolite were prepared with silica-alumina powders of different mean particle sizes, and the effects of particle size on the pore structure and HC catalytic performance were investigated. The structures of t…
The effect of oil soluble commercial corrosion inhibitors (OSCI) on the growth of bacteria and its corrosion inhibition efficiency were investigated. Corrosion inhibition efficiency was studied by rotating cage test and the nature of biodegradation of corrosion inhibitor was also analyzed by using FTIR, NMR and GC-MS.…
In stability studies on moisture-resistant Opalmon tablets in press-through-packages (PTP), which were placed in aluminum bags, we found that the degradation rate of the dextran formulation is faster than that of the lactose formulation. The fast degradation of the dextran formulation is attributed to residual moistur…
New continuous substitutional solid solutions Mg1−x Ni x (H2PO4)2 · 2H2O, Mn1−x Ni x (H2PO4)2 · 2H2O, Co1−x Ni x (H2PO4)2 · 2H2O, and Zn1−x Ni x (H2PO4)2 · 2H2O (0 ≤ x ≤ 1.00) crystallizing in monoclinic space group P21/n have been synthesized. Their end-member is Ni(H2PO4)2 · 2H2O. Ni(H2PO4)2 · 2H2O is isostructural…
Dendrite silver was synthesized on the carbon fiber by pulse electro-deposition method in AgNO3 aqueous solution. The morphology of the silver changed from dendrite to plate like crystal, and the formation mechanism was investigated by using continuous wave (CW) potential and rectangular wave potential. The fractal di…
Six new iron arsenate framework structures, Fe(2)As(2)O(7) x 2H(2)O, [Fe(6)As(8)O(32)H(4)](2-)(1,4-butanediamininium(2+)) x 2H(2)O, [Fe(4)As(6)O(22)H(2)](2-)(piperazinium(2+)), [Fe(5)As(5)O(24)H(4)](2-)(piperazinium(2+)) x 2H(2)O, [Fe(6)As(7)O(31)H(5)](2-)(dabco(2+)) and LiFeAsO(4)OH have been synthesised under hydrot…
ポリ乳酸(PLA)，ポリブチレンテレフタレート(PBT)，ポリエチレンテレフタレート(PET)およびポリエチレンナフタレート(PEN)の熱による主鎖開裂について研究を行った．熱重量分析，熱分解ガスクロマトグラフィー質量分析および元素分析によって分解生成物と残渣の分析を行った．また，使用した高分子に対して分解生成物と残渣の構造から計算した炭素，水素，酸素の積算値から分析の精度を検討した．ポリエステルが熱分解する場合の切断箇所の切断確率は PLA では C=O の前後が 48%, 47%であった．これに対して PBT では PLA で切断する二箇所の切断確率は 14%と低く，86%がカルボキシル基とアルキル基の結合で開裂した．PET,…
The half-metallicity and the stability of the ferromagnetic state have been investigated in the Heusler type alloys (Fe1−xCox)2CrZ (Z=s, p elements). If only the ferromagnetic state is assumed as the magnetic state of Fe2CrZ, the half-metallicity tends to appear easily as the total number of the valence electrons and…
We fabricated planar polymer optical waveguides doped with Eu-Al nanoclusters, and successfully demonstrated their optical amplification at a wavelength of 614 nm under both pulsed operation using a N2laser (λ=337 nm) and CW operation using a frequency-doubled diode-pumped solid-state laser (λ=532 nm). The optical gai…
Molecular dynamics simulations and the non-equilibrium direct method are used to predict the thermal conductivity of a Si/Ge superlattice modeled by the Stillinger-Weber potential at a temperature of 300 K. We focus on the methodology of making the thermal conductivity prediction (limited effort has been made to model…
The hydrothermal treatment was applied to sericin and the hydrolysis behavior was investigated. The gel filtration chromatography revealed that sericin was hydroly zed to di- o r tri-peptide easily when the treatment was made at 200deg. Inaddition, the hydrolyzate obtained showed an antioxidant activity against DPPH r…
O trabalho visa contribuir com o conhecimento da biodiversidade de diatomáceas no Estado de São Paulo e, particularmente, do gênero Lemnicola. Foram examinadas 96 amostras coletadas em 64 municípios distribuídos no Estado de São Paulo, incluindo materiais planctônicos e perifíticos de ambientes lóticos e lênticos. A ú…
An experimental research into aqueous photocatalytic oxidation (PCO) of the deicing compounds, 2-ethoxyethanol (2-EE), diethylene glycol monomethyl ether (DEGMME), and ethylene glycol (EG) was undertaken. The addition of iron ions to the acidic aqueous solutions to be treated displayed complex influence on the oxidati…
A H+-form lepidocrocite-like layered titanate H1.07Ti1.73O4 was exfoliated in a n-propylamine solution to prepare a colloidal solution of the titanate nanosheet. The nanosheet colloidal solution shows a very high reactivity with Ba(OH)2 in the formation reaction of BaTiO3. The sub-micrometer BaTiO3 sheet-like and sphe…
This work presents the thermal property study of single wall and multi wall carbon nanotubes (SWCNT and MWCNT) both in their purified and unpurified forms introduced to silicone elastomer to enhance the thermal diffusivity of this industrial polymer. An increase in thermal diffusivity was observed for incremental load…
The shape of silica nanoparticles is controlled when they are synthesized at liquid/liquid interfaces; the combination of organic and aqueous phases that form the interface can change the shape of silica into a triangle, cube, or rod.
SiNx thin film grown by plasma-enhanced chemical vapor deposition (PECVD) has conventionally been used as an antireflection layer of the silicon solar cell. In this work, a porous silicon (PS) layer formed by electrochemical etching was shaped on the surface of a crystalline silicon wafer for a simple alternative of a…
Electric energy storage devices with higher energy density and higher power density are required for hybrid electric vehicle use. We have investigated the structure and property of polyacenic semiconductor materials (PAS) and polycyclic aromatic hydrocarbons (PAHs) materials and the power characteristics (the resistan…
Polytetrafluoroethylene (PTFE) sheet was treated in an atmospheric pressure plasma using a series of feed gases (Water, Methanol, Ethanol, and Acetone) and the resulting surface modifications were evaluated by water contact angle measurements and x-ray photoelectron spectroscopy (XPS). We found that all plasma treatme…
The planar nature of a FRP structure results in relatively poor performance under impact loading. Furthermore, significant degradation in material performance can be experienced with minimal visual indication of damage, a scenario termed Barely Visible Impact Damage (BVID). Current damage tolerant design philosophies…