Results 81 to 90 of about 2,727,646 (335)
Ichnodiversity and bathymetric range of microbioerosion traces in polar barnacles of Svalbard
, 2020 This first comprehensive investigation of microbioerosion traces in polar barnacles addresses two bathymetrical transects from the intertidal down to subtidal water depths in two different carbonate factories in the Svalbard Archipelago: the bay ...
Wisshak, Max +2 more
core +1 more source
International Journal of Photoenergy, 2001 A fullerene derivative in which two oligophenylenevinylene (OPV) groupsare attached to C60 through a pyrrolidine ring has been prepared and photophysical studies in CH2CL2 solution show that photoinduced energy transfer from the OPV moieties to C60 ...
Nicola Armaroli +4 more
doaj +1 more source
Advances in Difference Equations, 2017 In this article, we propose a new two-level implicit method of accuracy two in time and three in space based on spline in compression approximations using two off-step points and a central point on a quasi-variable mesh for the numerical solution of the ...
RK Mohanty, Sachin Sharma
doaj +1 more source
FEBS Letters, EarlyView.Encapsulins are protein nanocompartments that play an important role in iron storage. In the Myxococcus xanthus encapsulin system, two cargo proteins called EncB and EncC contribute to iron mineralization. Here, we show that EncB and EncC generate iron‐containing minerals with distinct chemical compositions, suggesting that the composition of stored ...
Harry B. McDowell +2 more
wiley +1 more source
Recent advances in carbocupration of α-heterosubstituted alkynes
Beilstein Journal of Organic Chemistry, 2010 Carbocupration of α-heterosubstituted alkynes leads to the formation of stereodefined functionalized vinyl copper species as single isomer. Recent advances in the field show that a simple pre-association of the organometallic derivative with an ...
Ahmad Basheer, Ilan Marek
doaj +1 more source
Structural and biochemical analysis of a B12 superbinder
FEBS Letters, EarlyView.BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices +3 more
wiley +1 more source
Polar bivalves are characterized by high antioxidant defences
, 2005 Inevitably, aerobic life leads to the formation of deleterious reactive oxygen species (ROS) which participate in biomolecule oxidation, hence augmenting biomolecule turnover.
Depledge, Michael H. +3 more
core +1 more source
FEBS 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
Review of Climate change in the polar regions, by John Turner & Gareth J. Marshall
, 2012 In this ambitious, cross-disciplinary volume, British Antarctic Survey scientists John Turner and Gareth Marshall synthesize what is known about climate change in the Arctic and Antarctic and compare the changes that have occurred in the two polar ...
Orheim, Olav
core +1 more source
1HNMR OF PYRAZOLES: EFFECT OF INTERACTION OF CARBAMOYL GROUP WITH ADJACENT CENTERS ON THE CHEMICAL SHIFTS OF CONCERNED PROTONS [PDF]
Bulletin of Pharmaceutical Sciences. Assiut University, 1992 The 1HNMR of a series of constitutional isomers of dimethylpyrazole carboxamides revealed the contribution of p and/or n-electrons in deshielding protons a- to CONHR group.
Abd-El-Hamid Ahmed +2 more
doaj +1 more source