Results 51 to 60 of about 12,366,361 (187)

The class of the affine line is a zero divisor in the Grothendieck ring

open access: yes, 2018
We show that the class of the affine line is a zero divisor in the Grothendieck ring of algebraic varieties over complex numbers.

core   +1 more source

Quantum scattering of neon from a nanotextured surface [PDF]

open access: yes, 2009
Phonon exchange is the usual cause of decoherence in atom–surface scattering. By including quantum effects in the treatment of Debye–Waller scattering, we show that phonon exchange becomes ineffective when the relevant phonon frequencies are high.
Levi, A.C.   +7 more
core   +1 more source

Embryonic and larval development of the endangered Chiapas killifish Tlaloc hildebrandi (Cyprinodontiformes: Profundulidae)

open access: yesJournal of Fish Biology, EarlyView.
Abstract The early ontogeny of endemic freshwater fishes provides essential baseline biological information for conservation and management, particularly in species with restricted distributions and high vulnerability to habitat degradation, environmental change and population decline. This study presents the first detailed description of embryonic and
Rubén Alonso Contreras‐Tapia   +6 more
wiley   +1 more source

Photometric Follow-Up of Interstellar Comet 2I/ BORISOV Since Its Discovery

open access: yes, 2021
Talk delivered in 51st Lunar and Planetary Science Conference in Texas, USA, 16-20 March 2020In this abstract we compile the photometric measurements made of comet Borisov to exemplify the relevance of a systematic photometric study of interstellar ...
Trigo-Rodríguez, Josep María   +4 more
core  

Preparations of terminal oxidase cytochrome bd-II isolated from Escherichia coli reveal significant hydrogen peroxide scavenging activity

open access: yes, 2022
Cytochrome bd-II is one of the three terminal quinol oxidases of the aerobic respiratory chain of Escherichia coli. Preparations of the detergent-solubilized untagged bd-II oxidase isolated from the bacterium were shown to scavenge hydrogen peroxide ...
Martina R. Nastasi   +2 more
core   +1 more source

Reduction of Perioperative Blood Loss During Endoprosthetic Replacement of Large Joints

open access: yesОбщая реаниматология, 2011
Objective: to estimate changes in respiratory and circulatory functions in the acutest period in patients with pulmonary artery thromboembolism (PATE) without arterial hypotension during their first visit. Subjects and methods.
D. B. Borisov   +4 more
doaj   +1 more source

Political Connections, Subsidized Loans, and Capital Markets Development

open access: yesKyklos, EarlyView.
ABSTRACT This paper analyzes the relationship between political connections and firms' financing decisions in Brazil using large datasets on campaign contributions, loans from the Banco Nacional de Desenvolvimento Econômico e Social (BNDES), and financial variables from Capital IQ.
Eduardo Kazuo Kayo
wiley   +1 more source

The ComEA/ComEC Operon is Critical for Nitrosative Stress Tolerance by an Oral Commensal

open access: yesMolecular Oral Microbiology, EarlyView.
ABSTRACT Oral commensal streptococci play a large role in mediating microbial homeostasis. Our prior work has demonstrated that hydrogen peroxide (H2O2) produced by oral commensal streptococci can react with salivary nitrite (NO2) and generate peroxynitrite (ONOO−), a potent antimicrobial.
Sara E. Edmonds   +3 more
wiley   +1 more source

Microsecond time-resolved absorption spectroscopy used to study CO compounds of cytochrome bd from Escherichia coli. [PDF]

open access: yesPLoS ONE, 2014
Cytochrome bd is a tri-heme (b558, b595, d) respiratory oxygen reductase that is found in many bacteria including pathogenic species. It couples the electron transfer from quinol to O2 with generation of an electrochemical proton gradient.
Sergey A Siletsky   +3 more
doaj   +1 more source

Professor Aleksandr Evgenevich Borisov (on the 70th anniversary of the birth). [PDF]

open access: yes, 2019
Alexander Evgenievich Borisov – head of the Department of surgery named after N. D.
L. A. Levin   +2 more
core   +1 more source

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