نتایج جستجو برای: dme synthesis

تعداد نتایج: 410739  

Journal: :Acta clinica Croatica 2017
Martina Tomić Romano Vrabec Tamara Poljičanin Spomenka Ljubić Lea Duvnjak

Diabetes is one of the leading public health problems worldwide. Diabetic macular edema (DME) is the main cause of vision loss in patients with diabetes. Ideal metabolic control of diabetes is the primary goal of treatment and the basic way of preventing and stopping the progression of DME. Although laser photocoagulation has been the standard treatment of DME for nearly three decades, superior...

Journal: :Biochemical and biophysical research communications 2007
Hyonhwa Ohr Anhthu Q Bui Brandon H Le Robert L Fischer Yeonhee Choi

The Arabidopsis DEMETER (DME) DNA glycosylase is required for the maternal allele expression of imprinted Polycomb group (MEDEA and FIS2) and transcription factor (FWA) genes in the endosperm. Expression of DME in the central cell, not in pollen or stamen, establishes gene imprinting by hypomethylating maternal alleles. However, little is known about other genes regulated by DME. To identify pu...

Hydrogen was produced by steam reforming of dimethyl ether (DME) using a physical mixture of commercial HZSM-5 zeolite (for DME hydrolyzing) and Cu/ZnO/Al2O3 (for methanol steam reforming) as a catalyst in a fixed bed reactor. The experiments were performed at atmospheric pressure and in a temperature range from 270 to 310 °C. The effects of feed temperature and gas hourly space velocity (GHSV)...

2013
YOSHITO AKAGI KAZUO SHIROUZU SHIN FUJITA HIDEKI UENO YASUMASA TAKII KOJI KOMORI MASAAKI ITO KENICHI SUGIHARA

A treatment strategy based on the distance of mesorectal extension (DME) for pT3N1-2 rectal cancer patients without pre-operative chemoradiotherapy has not yet been defined. The present study aimed to describe the benefit of the measurement of mesorectal extension in stratifying treatment for pT3N1-2 rectal cancer patients. Data from 512 patients with pT3N1-2 rectal cancer undergoing curative s...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2017
Jin-Sup Park Jennifer M Frost Kyunghyuk Park Hyonhwa Ohr Guen Tae Park Seohyun Kim Hyunjoo Eom Ilha Lee Janie S Brooks Robert L Fischer Yeonhee Choi

The DEMETER (DME) DNA glycosylase initiates active DNA demethylation via the base-excision repair pathway and is vital for reproduction in Arabidopsis thaliana DME-mediated DNA demethylation is preferentially targeted to small, AT-rich, and nucleosome-depleted euchromatic transposable elements, influencing expression of adjacent genes and leading to imprinting in the endosperm. In the female ga...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2004
Yeonhee Choi John J Harada Robert B Goldberg Robert L Fischer

Helix-hairpin-helix DNA glycosylases are typically small proteins that initiate repair of DNA by excising damaged or mispaired bases. An invariant aspartic acid in the active site is involved in catalyzing the excision reaction. Replacement of this critical residue with an asparagine severely reduces catalytic activity but preserves enzyme stability and structure. The Arabidopsis DEMETER (DME) ...

Ahmad Shariati, Hamed Rashidi, Mohammad Reza Khosravi Nikou Touba Hamoule,

MSU-S mesoporous catalyst with [SiO2]/[Al2O3] ratio of 55 was synthesized using tetrapropylammonium hydroxide (TPAOH) as a structure directing agent and hexadecyltrimethylammonium bromide (CTAB) as a surfactant. The catalytic activity of the calcined sample was evaluated for the dehydration of methanol to dimethyl ether (DME) in a vertical fixed bed microreactor...

2006
Tomoya Tsuji Toshihiko Hiaki Mitsuo Namba

The industrial production of dimethyl ether (DME) is now about 10,000 ton/year in Japan, and DME has been mainly used as an aerosol propellant. Recently, DME can be directly synthesized from water gas, carbon monoxide and hydrogen, by use of a new type catalyst dispersed in fluids. So, a large amount of DME will be supplied in future. Considering the molecular structure, the physical properties...

Journal: :Dalton transactions 2010
Allison W Wong Kevin L Miller Paula L Diaconescu

A comparison between the reactivity behavior of two lutetium benzyl complexes supported by different ferrocene-diamide ligands towards aromatic N-heterocycles, such as 1-methylimidazole, isoquinoline, and pyridines, is presented. The two ferrocene-diamide ancillary ligands differ in their nitrogen-donor substituent: adamantyl for one and t-butyldimethylsilyl for the other. The synthesis and cha...

2012
K. R. PATIL S. S. THIPSE

This paper provides a comprehensive review of the technical feasibility of DME-Diesel blend as an alternative fuel for compression-ignition engines for automotive applications. DME is a synthetic fuel produced by the conversion of various feedstocks such as natural gas, coal, oil residues and bio-mass. The compatible properties such as high cetane number and low auto-ignition temperature with s...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید