Results 51 to 60 of about 854,777 (264)

The interplay of global and polar regimes [PDF]

open access: yes, 1999
The growing salience of interactions between the functionally broad but geographically narrow regimes for the polar regions and the geographically broad but functionally specific regimes emerging to deal with global environmental changes directs ...
Young, Oran R.
core   +1 more source

Structures of mycobacterial 3‐methylcrotonyl‐CoA carboxylase reveal carrier‐domain translocation between catalytic sites

open access: yesFEBS Letters, EarlyView.
Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav   +2 more
wiley   +1 more source

Tundra degradation in the vicinity of the Polish Polar Station, Hornsund, Svalbard [PDF]

open access: yes, 1985
Studies performed in the summers of 1979 and 1980 in the surroundings of the Polish Polar Station at Hornsund, Svalbard, aimed at determining the impact of the presence of a research station on its immediate tundra surroundings.
Krzyszowska, Anna Jadwiga
core   +1 more source

Integral mean estimates of Turán-type inequalities for the polar derivative of a polynomial with restricted zeros

open access: yesOpen Mathematics
In this article, we extend inequalities concerning the polar derivative of a polynomial to integral mean for the class of polynomials with s-fold zero at the origin and the remaining zeros inside some closed disk of radius kk for k≥1k\ge 1 and k≤1k\le 1,
Singha Nirmal Kumar, Chanam Barchand
doaj   +1 more source

15 alpha-hydroxylation of a bile acid analogue, sodium 3 alpha,7 alpha-dihydroxy-25,26-bishomo-5 beta-cholane-26-sulfonate in the hamster.

open access: yesJournal of Lipid Research, 1996
The metabolism of 3 alpha,7 alpha-dihydroxy-25,26-bishomo-5 beta-cholane-26-sulfonate (bishomoCDC-sul), the sulfonate analogue of bishomochenodeoxycholic acid, and its effect on biliary bile acid composition were studied during chronic administration in ...
T Mikami   +9 more
doaj   +1 more source

The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation

open access: yesFEBS Letters, EarlyView.
Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge   +6 more
wiley   +1 more source

Revisiting perceptions and evolving culture: a community dialogue on women in polar research [PDF]

open access: yes, 2018
Women have made outstanding contributions to polar research in recent decades, though full engagement may be hindered by persistent inequities, including notably the prevalence of workplace harassment.
Seag, M.   +3 more
core  

Modelling of polar bear populations by the Leslie matrix population model

open access: yes, 2010
Some general doubts have been voiced regarding the soundness of using a Leslie matrix population projection on polar bear ...
Larsen, Thor, Ugland, Karl I.
core   +1 more source

Extension of Some Polynomial Inequalities to the Polar Derivative [PDF]

open access: yes, 2012
Let $p(z)$ be a polynomial of degree $n$ and ${D_\propto }p(z) = np(z) + (\propto - z)p'(z)$ denote the polar derivative of the polynomial $p(z)$ with respect to the point $\propto$.
Pukhta, M. S.
core   +1 more source

Going viral − Virus‐targeting nanobodies for research, diagnostics and therapy

open access: yesFEBS Letters, EarlyView.
The increasing prevalence of viral diseases represents a major threat for global human health. Nanobodies, small binding fragments derived from camelid heavy‐chain antibodies, offer versatile tools for viral research, diagnostics, and antiviral therapy.
Domenic Ebert, Ulrich Rothbauer
wiley   +1 more source

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