نتایج جستجو برای: methanol enhancement

تعداد نتایج: 157684  

Journal: :The journal of physical chemistry. B 2005
Kristine Drew G Girishkumar K Vinodgopal Prashant V Kamat

A hybrid carbon fiber electrode (CFE) consisting of TiO2 semiconductor photocatalyst and Pt-Ru catalyst has been developed to boost the performance of direct methanol fuel cells (DMFC). These two catalyst nanoparticles are deposited on opposite sides of the carbon fiber paper such that methanol oxidation is carried out catalytically on Pt-Ru and photocatalytically on TiO2 under UV-light irradia...

Journal: :Nano letters 2015
Jing Qiu Guangtong Zeng Mai-Anh Ha Mingyuan Ge Yongjing Lin Mark Hettick Bingya Hou Anastassia N Alexandrova Ali Javey Stephen B Cronin

Here, we report photocatalytic CO2 reduction with water to produce methanol using TiO2-passivated InP nanopillar photocathodes under 532 nm wavelength illumination. In addition to providing a stable photocatalytic surface, the TiO2-passivation layer provides substantial enhancement in the photoconversion efficiency through the introduction of O vacancies associated with the nonstoichiometric gr...

Journal: :Dalton transactions 2012
Ryo Tsunashima Takumi Matsumoto Norihisa Hoshino Wataru Niiho Mizuki Kimura Kei Kondo Yoshihiko Suyama Yukihiro Nishioka Jun Kawamata Shin-ichiro Noro Takayoshi Nakamura Tomoyuki Akutagawa Katsuya Ishiguro

A new salt-[Ni(II)(DMSO)(5)(TTFPy)](2)[α-SiW(12)O(40)] (1)-based on polyoxometalates was prepared by coordinating a cationic electron donor of pyridyltetrathiafulvalene (TTFPy) with Ni(II). Although the TTFPy molecule did not form a salt with the anionic α-[SiW(VI)(12)O(40)](4-) because of the weak charge-transfer (CT) interaction, the coordination of Ni with the pyridyl moiety permitted salt f...

2011
Ratree Pranakhon Patchareewan Pannangpetch Chantana Aromdee R. Pranakhon

Agarwood leaf extract was found to possess antipyretic, laxative and antimicrobial activities. A trial of one diabetic patient taking long term agarwood leaf tea was found to have blood glucose returned to normal. In this work, the effects of methanol, water and hexane crude extracts of agarwood leaf on hyperglycemia in streptozotocin-induced diabetic rats were investigated. Only methanol and w...

2012
Sanjeev Kumar Sophie D. Lefevre Marten Veenhuis Ida J. van der Klei

BACKGROUND Chronological aging of yeast cells is commonly used as a model for aging of human post-mitotic cells. The yeast Saccharomyces cerevisiae grown on glucose in the presence of ammonium sulphate is mainly used in yeast aging research. We have analyzed chronological aging of the yeast Hansenula polymorpha grown at conditions that require primary peroxisome metabolism for growth. METHODO...

Journal: :Separations 2023

Peanut skin as an agriculture waste has poor economic value. Utilizing subcritical methanol extraction (SME) to recover catechin and epicatechin interest compounds from peanut is one of the solutions valorize into more valuable products. Therefore, objective this research examine parameter impacts on extract recovery by methanol. Extraction was conducted under three independent variables—pressu...

2007
L M. RABINOVITCH

It is not sufficiently appreciated that methly alcohol is very toxic. For econoi' reasons, methyl (wood) alcohol is employed as a substitute for tbyl (grain) alcohol, in what may be termed comparatively innocent products, such as perfumes, hair tonics, skin lotions, , '/ polishes, varnishes, etc. Government analysts, not infrequently, find it employed in the manufacture of various extracts for ...

2002
Jan-Willem Handgraaf Titus S. van Erp Evert Jan Meijer

We present a density-functional theory based molecular-dynamics study of the structural, dynamical, and electronic properties of liquid methanol under ambient conditions. The calculated radial distribution functions involving the oxygen and hydroxyl hydrogen show a pronounced hydrogen bonding and compare well with recent neutron diffraction data, except for an underestimate of the oxygen-oxygen...

Journal: :Physical review letters 2003
J J Heckman M P Ledbetter M V Romalis

We report an enhancement of proton NMR signals by a factor of 10(6) by cross polarization with hyperpolarized liquid 129Xe in an ultralow magnetic field of 1 microT. The NMR signals from cyclopentane, acetone, and methanol are detected using a commercial high-T(c) SQUID magnetometer with a signal-to-noise ratio of up to 1000 from a single 90 degrees tipping pulse. This technique allows a wide r...

Journal: :The Analyst 2012
Vairaperumal Tharmaraj Selvaraj Devi Kasi Pitchumani

4-Methoxy-N-((thiophen-2-yl)methyl)benzenamine was found to be a highly selective chemosensor for Ag(+) ion in methanol-water (1 : 1 v/v) mixture over other metal ions such as Na(+), K(+), Li(+), Cu(+), Ba(2+), Cd(2+), Co(2+), Cu(2+), Fe(2+), Hg(2+), Mn(2+), Ni(2+), Pb(2+) and Zn(2+) with a limit of detection (LOD) is 5.0 × 10(-6) mol L(-1). Upon binding to Ag(+) ion, a strong fluorescent enhan...

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