نتایج جستجو برای: bitumens modifier

تعداد نتایج: 10848  

Journal: :Applied sciences 2021

The retention factor is the key quantity for thermodynamic analysis of mechanism in chromatographic experiments. In this work, we measure factors moderately polar solutes on four silica-based porous matrices as stationary phases by supercritical fluid chromatography. Elution only possible with binary mixtures carbon dioxide (sc-CO2) and modifier (methanol) due to low polarity pure sc-CO2. addit...

2004
Phil Maguire

The combination of two existing words is a productive strategy used by speakers to convey new concepts and extend the limits of their vocabulary. In English compounds, the first word or modifier attaches further meaning to the second word or head, thus creating a reference to the intended concept. According to Gagné and Shoben’s (1997) Competition Among Relations In Nominals (CARIN) theory, the...

Journal: :Trends in biochemical sciences 2008
Marcus Groettrup Christiane Pelzer Gunter Schmidtke Kay Hofmann

Since its discovery in 1981, ubiquitin-activating enzyme 1 was thought to be the only E1-type enzyme responsible for ubiquitin activation. Recently, a relatively uncharacterized E1 enzyme, designated ubiquitin-like modifier activating enzyme 6, was also shown to activate ubiquitin. Ubiquitin-activating enzyme 1 and ubiquitin-like modifier activating enzyme 6 are both essential proteins, and eac...

Journal: :Genetics 1988
J A McKenzie G M Clarke

Genetic evidence suggests that the evolution of resistance to the insecticide diazinon in Lucilia cuprina initially produced an increase in asymmetry. At that time resistant flies were presumed to be at a selective disadvantage in the absence of diazinon. Subsequent evolution in natural populations selected modifiers to ameliorate these effects. The fitness and fluctuating asymmetry levels of r...

Journal: :Journal of theoretical biology 1996
Y Haraguchi A Sasaki

If constantly changing genotypes are favorable in host and parasite coevolution, an indefinite escalation of mutation rates would result despite heavy mutational loads. We theoretically study this possibility by examining the mutation modifier dynamics of host and parasite that engage in genotype-specific epidemiological interaction. In the first model, we study the evolutionarily stable (ESS) ...

Journal: :international journal of nano dimension 0
m. seyedsadjadi department of chemistry, science and research branch, islamic azad university, tehran, 1477892855 iran. f. asgari department of chemistry, science and research branch, islamic azad university, tehran, 1477892855 iran. n. farhadyar department of chemistry, varamin –pishva branch, islamic azad university, varamin, iran. n. molahasani department of chemistry, tehran shargh (qiamdasht) branch, islamic azad university, tehran, iran.

in this work, we report, optical properties of cd1-xsnxte quantum dots (x= 0.05, 0.10 and 0.15) synthesized in water using thioglycolic acid (tga) as a modifier agent. the optical characterization of the samples was performed through absorption (uv) and photoluminescence spectra (pl). a red shift absorption and fluorescent emission peaks was observed which can be related to the increase of nano...

2004
Phil Maguire Arthur W. S. Cater

We describe two experiments using French noun-noun combinations which parallel a study carried out by Gagné (2001) using English combinations. The order of the modifier and head noun are reversed in French, allowing us to investigate whether the influence of relation priming that Gagné found is due to the order of the modifier and head noun or whether it is due to their different functional rol...

2012
Bruce A. Hamilton Benjamin D. Yu

Modifier genes are an integral part of the genetic landscape in both humans and experimental organisms, but have been less well explored in mammals than other systems. A growing number of modifier genes in mouse models of disease nonetheless illustrate the potential for novel findings, while new technical advances promise many more to come. Modifier genes in mouse models include induced mutatio...

Journal: :علوم و تکنولوژی پلیمر 0
حسین زیاری سیدمجتبی ابطحی احمد گلی

polymer application for the improvement and modification of the bitumen used in roads surfaces has expanded in recent decades. the roads engineers and constructors, therefore, have used the modified bitumen in asphalts helping in this way to increase roads and pavements service life and improving the durability of the roads and asphalts. the bitumen used in asphalt mixture constitutes only a lo...

Journal: :international journal of bio-inorganic hybrid nanomaterials 0

the comparison of growth processes and fluorescent properties of cdznte semiconductor quantum dots that are synthesized in different concentrations of zn2+ in water are discussed in this paper. the samples are characterized through absorbtion (uv) and photoluminescence spectra (pl). the results show that when the reaction time is prolonged, the absorption peak and fluorescent emission peak pres...

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