Results 41 to 50 of about 2,522,188 (370)

Computational Prediction of Chiral Iron Complexes for Asymmetric Transfer Hydrogenation of Pyruvic Acid to Lactic Acid

Molecules, 2020
Density functional theory calculations reveal a formic acid-assisted proton transfer mechanism for asymmetric transfer hydrogenation of pyruvic acid catalyzed by a chiral Fe complex, FeH[(R,R)-BESNCH(Ph)CH(Ph)NH2](η6-p-cymene), with formic acid as the ...
Wan Wang, Xinzheng Yang
doaj   +1 more source

A method to find unstable periodic orbits for the diamagnetic Kepler Problem

, 2000
A method to determine the admissibility of symbolic sequences and to find the unstable periodic orbits corresponding to allowed symbolic sequences for the diamagnetic Kepler problem is proposed by using the ordering of stable and unstable manifolds.
Cvitanovic P, Eckhardt B, Hansen K T, Hardy G M, Jin-Yan Zeng, Tanner G, Wu Z-B, Zuo-Bing Wu   +7 more
core   +1 more source

Unstable particle's wave-function renormalization prescription [PDF]

, 2005
We strictly define two set Wave-function Renormalization Constants (WRC) under the LSZ reduction formula for unstable particles at the first time.
Denner A., Eden R. J., Lehmann H., YONG ZHOU   +3 more
core   +2 more sources

The anti‐CRISPR protein AcrIE8.1 inhibits the type I‐E CRISPR‐Cas system by directly binding to the Cascade subunit Cas11

FEBS Letters, EarlyView.
In this study, we present the structure of AcrIE8.1, a previously uncharacterized anti‐CRISPR protein that inhibits the type I‐E CRISPR‐Cas system. Through a combination of structural and biochemical analyses, we demonstrate that AcrIE8.1 directly binds to the Cas11 subunit of the Cascade complex to inhibit the CRISPR‐Cas system.
Young Woo Kang, Hyun Ho Park
wiley   +1 more source

Screening Characteristics of TIMI Score in Predicting Acute Coronary Syndrome Outcome; a Diagnostic Accuracy Study

Archives of Academic Emergency Medicine, 2017
Introduction: In cases with potential diagnosis of ischemic chest pain, screening high risk patients for adverse outcomes would be very helpful. The present study was designed aiming to determine the diagnostic accuracy of thrombolysis in myocardial ...
Mostafa Alavi-Moghaddam, Saeed Safari, Hamideh Alavi-Moghaddam   +2 more
doaj   +1 more source

Hygroscopic behavior of multicomponent organic aerosols and their internal mixtures with ammonium sulfate [PDF]

Atmospheric Chemistry and Physics, 2016
Water-soluble organic compounds (WSOCs) are important components of organics in the atmospheric fine particulate matter. Although WSOCs play an important role in the hygroscopicity of aerosols, knowledge on the water uptake behavior of internally ...
B. Jing, B. Jing, B. Jing, S. Tong, S. Tong, Q. Liu, K. Li, W. Wang, Y. Zhang, M. Ge   +9 more
doaj   +1 more source

Matrix Stiffness Induces Pericyte-Fibroblast Transition Through YAP Activation

Frontiers in Pharmacology, 2021
Vascular pericytes, important mural cells that retain progenitor cell properties and protect vascular integrity in healthy tissues, are often associated with tumor development, but their functions in cancer invasion remain elusive.
Feng Feng, Feng Feng, Xueyan Feng, Xueyan Feng, Di Zhang, Di Zhang, Qilong Li, Qilong Li, Li Yao, Li Yao   +9 more
doaj   +1 more source

Multiple Front Propagation Into Unstable States

, 1993
The dynamics of transient patterns formed by front propagation in extended nonequilibrium systems is considered. Under certain circumstances, the state left behind a front propagating into an unstable homogeneous state can be an unstable periodic pattern.
A. Amengual, A. Amengual, A. Hagberg, A.N. Kolmogorov, C. Bender, D. Aronson, D. Jordan, E. Ben Jacob, E. Hernández-García, E. Salje, F.J. Elmer, G. Ahlers, G. Bales, G. Dee, G. Dee, G. Dee, G.C. Paquette, J. Fineberg, J.A. Powel, K.J. Lee, L. Tuckerman, L. Y. Chen, M. S. Miguel, M. San Miguel, M.C. Cross, N. Ashcroft, N. Niklas, P. Huerre, R. Montagne, W. van Saarloos, W. van Saarloos, W. van Saarloos, W. van Saarloos   +32 more
core   +1 more source

Time after time – circadian clocks through the lens of oscillator theory

FEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo, Carolin Ector, Hanspeter Herzel   +2 more
wiley   +1 more source

Síndrome de Wellens Síndrome de Wellens Wellens syndrome

Arquivos Brasileiros de Cardiologia, 2010
A avaliação de dor torácica é prática de rotina em serviços de emergência. Embora seja queixa comum e com amplo diagnóstico diferencial. é na suspeita de síndrome coronariana aguda (SCA) que a preocupação é maior.
Marcelo Campos Appel-da-Silva, Gabriel Zago, Aníbal Pereira Abelin, Walter Otávio Pin, Oscar Pereira Dutra, Renato Vaz   +5 more
doaj   +1 more source