Results 41 to 50 of about 133,589 (258)

Transparent origami glass

open access: yesNature Communications, 2021
Glass is indispensable but its processing options are limited. Here the authors extend origami techniques to shaping three-dimensional transparent glass by introducing physical cavitation and chemical dynamic bond exchange in the pre-glass polymer-silica
Yang Xu   +4 more
doaj   +1 more source

An unexpected alternative viologen electron mediator site in tungsten‐containing formate dehydrogenase

open access: yesFEBS Letters, EarlyView.
An unexpected alternative interaction site for ethyl viologen was identified in formate dehydrogenase 1 from Methylorubrum extorquens. Combined mutagenesis, kinetic analysis, and docking revealed that aromatic residues near an iron–sulfur cluster enable flavin mononucleotide‐independent electron transfer, offering a framework for engineering improved ...
Eleni G. Poloniataki, Yong Hwan Kim
wiley   +1 more source

O Impacto da Taxa de Câmbio no Apreçamento de Opções no Brasil–Uma Análise Comparativa entre um Modelo de Rede Neural e o Modelo de Black & Scholes

open access: yesRevista de Economia Mackenzie, 2009
The main goal of this paper is to evaluate the impact of the exchange rate volatility in price prediction of derivative securities in the Brazilian capital markets using an artificial neural network technique, given the Black & Scholes Model ...
Carlos Alberto Aragón de Planas   +2 more
doaj  

Tackling Investment Risks Using Equity Options During Extreme Economic Upheavals: Indian Evidence

open access: yesColombo Business Journal, 2021
The study is an empirical scrutiny on the Indian equity options market to examine whether it facilitates the reduction of investment risks, focusing on an economic sphere with financial upheavals.
James Varghese
doaj   +1 more source

Cell geometry and membrane protein crowding constrain Escherichia coli growth rate, overflow metabolism, respiration, and maintenance energy

open access: yesFEBS Letters, EarlyView.
The physical dimensions and shape of bacterial cells define the surface area available to acquire nutrients and the volume available for synthesizing proteins and DNA. Here, we use computational systems biology to decode the importance of cell geometry as a major determinant of prokaryotic phenotype, including growth rate and metabolic efficiency. This
Ross P. Carlson   +6 more
wiley   +1 more source

THE IMPACT OF STOCK OPTIONS TRADING ON THE MARKET VALUE OF COMPANIES LISTED IN KUWAIT STOCK EXCHANGE [PDF]

open access: yesBusiness Excellence and Management, 2012
This study aims to examine the impact of stock options trading on the market value of companies listed in Kuwait Stock Exchange. The phenomenon of volatility in securities prices concerned as a threat to the companies listed on Kuwait Stock Exchange ...
Ghada Ali TIMRAZ   +1 more
doaj  

Salmonella lipopolysaccharide‐containing supported lipid bilayers as platforms to study bacteriophage interactions

open access: yesFEBS Letters, EarlyView.
We present robust protocols for the preparation of supported lipid bilayers (SLBs) incorporating either Salmonella smooth LPS or outer membrane vesicles (OMVs). We use a combination of quartz crystal microbalance with dissipation (QCM‐D) and fluorescence microscopy to both characterize the SLBs of various compositions and to probe their interactions ...
Hudson P. Pace   +6 more
wiley   +1 more source

Perspectivas del Mercado de Derivados en Colombia Retraso derivado del desconocimiento Perspectivas del Mercado de Derivados en Colombia Retraso derivado del desconocimiento

open access: yesAD-minister, 2006
El mercado de derivados representa la evolución de los mercados financieros enel mundo, debido a la capacidad que tiene el primero de ofrecer cobertura a losparticipantes del mercado, función importante en el actual contexto de globalización.Por lo ...
Natalia Cañas Arboleda
doaj  

Three phosphatase families form a community: The phosphohydrolases that act upon inositol pyrophosphates

open access: yesFEBS Letters, EarlyView.
Inositol pyrophosphates are energy‐rich signaling molecules that perform critical functions in cells. Three different families of phosphatases hydrolyze the β phosphate of the inositol pyrophosphate molecules: two have narrow specificities and one is promiscuous.
Ronda J. Rolfes
wiley   +1 more source

Reconstructing enzyme evolution by protein engineering

open access: yesFEBS Letters, EarlyView.
Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler   +2 more
wiley   +1 more source

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