نتایج جستجو برای Modification

تعداد نتایج: 86422  

2005
Veneeta Dayal,

This paper looks at the phenomena of licensing by modification, whereby an unacceptable noun phrase is redeemed by the presence of a modifier or an unavailable reading for a noun phrase is made available with the addition of a modifier. It argues that an optimal account of such phenomena should derive these effects from the interaction of the meanings of individual expressions in the sentence r...

2006
Yuri A. Rylov,

The third modification of the space-time geometry is considered. (The first modification is the spacial relativity, the second one is the general relativity.) After the third modification of the space-time geometry the motion of free particles become to be primordially stochastic (multivariant). This circumstance forces one to construct a multivariant dynamics. The multivariant dynamics is the ...

1991
G. Ramalingam, Thomas W. Reps,

Given a program base and two of its variants a and b, the problem of program integration is to determine whether the modifications made to base to produce a and b have undesirable semantic interactions, and if there is no such interference, to produce a merged program that incorporates the modifications made in developing either of the variants. Program-modifications can be formalized as functi...

2016
Richard D. Morgan, Yvette A. Luyten, Samuel A. Johnson, Emily M. Clough, Tyson A. Clark, Richard J. Roberts,

We identify a new subgroup of Type I Restriction-Modification enzymes that modify cytosine in one DNA strand and adenine in the opposite strand for host protection. Recognition specificity has been determined for ten systems using SMRT sequencing and each recognizes a novel DNA sequence motif. Previously characterized Type I systems use two identical copies of a single methyltransferase (MTase)...

Journal: :The Journal of antibiotics 1985
R C Thomas, E L Fritzen,

The C-3'-carbonyl group of N-protected spectinomycin is efficiently converted into a diazo group via base treatment of the corresponding tosylhydrazone. The diazo group imparts a new synthetically useful reactivity pattern on the sugar ring of the molecule. The synthesis of C-3'-deoxo-, monohalo- and dihalospectinomycins via the intermediacy of these diazo compounds is described. The reduced bi...

Journal: :international journal of environmental research 0
e. kalipci, department of environmental engineeri..., department of environmental engineeri..., department of environmental engineeri..., department of environmental engineeri...,

in this study, removal of methylene blue (mb) and maxilon blue sl 200% (mb sl) dyes from aqueous solutions by using raw clay (rc) of nevsehir (turkey) vicinity and ultrasonic-acid modified clay (mc) was investigated. adsorption was carried out with 500 mg/l mb and 50 mg/l for mb sl in terms of different adsorbent dosages, contact time, solution ph, temperature and stirring speed. the fitting of...

1999
Julie Schmucker-Castner, Dilip Desai,

A fundamental study of the stability of hydrogen peroxide-based gels, thickened using cross-linked polyacrylic acid polymers, will be presented. Recent systematic experiments will demonstrate that excellent long-term stability of such gels can be achieved. The study evaluates different types of crosslinked polyacrylic acid polymers (as well as an associative acrylic polymer), several commercial...

2004
Tim Fernando,

A post-condition for Pat stopping the car is that the car be at rest. To satisfy a pre-condition for the car hitting the tree (namely, that the car not be at rest), inertia requires that some intervening force act on the car (as hinted, for example, by (2)). In the absence of such a force, (1) would appear to suggest that Pat prevented a collision between car and tree. Exactly what bit of physi...

2005
Tsuneo Kameyama, Mitsuko K. Ishii, Takashi Yoshiike,

The rate constant of modification of a specific thiol group, SH 2, with Nethylmaleimide (NEM) has been used to estimate the conformational change in the local area containing SH2 (SH2 region) of skeletal myosin as a structural probe. The rate of Mg 2§ SH 2 modification of subfragment-1 (S-l) isozymes was regulated by Ca 2 § in the pCa range below 6.4 and was not regulated in the pCa range above...

Journal: :Current opinion in biotechnology 2003
Benjamin G Davis,

Although several powerful methods exist for the redesign of enzyme structure and function these are typically limited to the 20 most abundant proteinogenic amino acids. The use of chemical modification overcomes this limitation to allow virtually unlimited alteration of amino acid sidechain structures. If heterogeneous mixtures of enzyme products are to be avoided, however, the required chemist...

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