Results 21 to 30 of about 1,582,967 (422)

How do Planktonic Particle Collection Methods Affect Bacterial Diversity Estimates and Community Composition in Oligo-, Meso- and Eutrophic Lakes?

open access: yesFrontiers in Microbiology, 2020
Particles are hotspots of bacterial growth and nutrient recycling in aquatic ecosystems. In the study of particle-attached (PA) and/or free-living (FL) microbial assemblages, the first step is to separate particles from their surrounding water columns ...
Guijuan Xie   +7 more
doaj   +1 more source

Influence of Centrifugation and Shaking on the Self-Assembly of Lysozyme Fibrils

open access: yesBiomolecules, 2022
Protein self-assembly into fibrils and oligomers plays a key role in the etiology of degenerative diseases. Several pathways for this self-assembly process have been described and shown to result in different types and ratios of final assemblies ...
Marzena Krzek   +4 more
doaj   +1 more source

Dynamic electron-phonon and spin-phonon interactions due to inertia [PDF]

open access: yesPhysical Review Research 4, L012004, 2022, 2021
THz radiation allows for the controlled excitation of vibrational modes in molecules and crystals. We show that the circular motion of ions introduces inertial effects on electrons. In analogy to the classical Coriolis and centrifugal forces, these effects are the spin-rotation coupling, the centrifugal field coupling, the centrifugal spin-orbit ...
arxiv   +1 more source

State- and molecule-selective rotational control in gas mixtures with a shaped optical centrifuge [PDF]

open access: yes, 2021
We demonstrate experimentally a method of all-optical selective rotational control in gas mixtures. Using an optical centrifuge - an intense laser pulse whose linear polarization rotates at an accelerated rate, we simultaneously excite two different molecular species to two different rotational frequencies of choice.
arxiv   +1 more source

Utilization of Aloe Vera Extract as A Natural Coagulant and its Effect on The Characteristics of IRR 118 Clone Rubber

open access: yesJurnal Rekayasa Kimia & Lingkungan, 2023
Rubber is one of the plantation products as a foreign exchange earner for the country. The process of processing rubber requires coagulants to accelerate coagulation.
Feerzet Achmad   +5 more
doaj   +1 more source

SEPARAÇÃO SÓLIDO-LÍQUIDO: CENTRÍFUGAS E PAPÉIS DE FILTRO

open access: yesQuímica Nova, 2015
This work describes the fundamentals and evolution of two current solid-liquid separation methods found in the chemical laboratory: the filter paper and the centrifuge.
Alexander Rangel Bastos   +1 more
doaj   +1 more source

The impact of the centrifuge characteristics and centrifugation protocols on the cells, growth factors, and fibrin architecture of a leukocyte- and platelet-rich fibrin (L-PRF) clot and membrane

open access: yesPlatelets, 2018
L-PRF (leukocyte- and platelet-rich fibrin) is one of the four families of platelet concentrates for surgical use and is widely used in oral and maxillofacial regenerative therapies.
D. M. Dohan Ehrenfest   +9 more
semanticscholar   +1 more source

Influence of the conditions for the preparation and thermal destruction of ammonium tetravanadate on the composition of oxide-vanadic electro-functional materials

open access: yesTrudy Odesskogo Politehničeskogo Universiteta, 2017
The work represents the investigation of the influence of technological stages of ammonium tetravanadate preparation on the final composition of vanadium oxide products. The purpose of experimental studies is to determine the technological parameters for
Luskan К. V.   +3 more
doaj   +1 more source

The effect of the centrifugal acceleration on period spacings of gravito-inertial modes in intermediate-mass stars [PDF]

open access: yesA&A 648, A97 (2021), 2021
The Kepler and TESS missions delivered high-precision, long-duration photometric time series for hundreds of main-sequence stars with gravito-inertial (g) pulsation modes. This high precision allows us to evaluate increasingly detailed theoretical stellar models.
arxiv   +1 more source

Reduction of relative centrifugation force within injectable platelet-rich-fibrin (PRF) concentrates advances patients’ own inflammatory cells, platelets and growth factors: the first introduction to the low speed centrifugation concept

open access: yesEuropean Journal of Trauma and Emergency Surgery, 2017
PurposeThe aim of this study was to analyze systematically the influence of the relative centrifugation force (RCF) on leukocytes, platelets and growth factor release within fluid platelet-rich fibrin matrices (PRF).Materials and methodsSystematically ...
J. Choukroun, S. Ghanaati
semanticscholar   +1 more source

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