Results 11 to 20 of about 546,836 (301)

Rainfall and Tidal Cycle Regulate Seasonal Inputs of Microplastic Pellets to Sandy Beaches

open access: yesFrontiers in Environmental Science, 2020
Microplastic contamination of coastal environments is a global problem and pellets used in industrial processes are a persistent and worldwide form of microplastic pollution.
Danilo Balthazar-Silva   +8 more
doaj   +1 more source

Protoplast Preparation for Algal Single-Cell Omics Sequencing

open access: yesMicroorganisms, 2023
Single-cell sequencing (SCS) is an evolutionary technique for conducting life science research, providing the highest genome-sale throughput and single-cell resolution and unprecedented capabilities in addressing mechanistic and operational questions ...
Junran Ye   +6 more
doaj   +1 more source

Exploring Hypotheses on Early Holocene Caspian Seafaring Through Personal Ornaments: A Study of Changing Styles and Symbols in Western Central Asia

open access: yesOpen Archaeology, 2023
This article studies the discoid Didacna sp. shell beads discovered at Kaylu, a Middle Holocene burial site located in Southern Turkmenistan. Microscopic, morphometric, spectrometric, and SEM analyses were carried out on the material to identify how the ...
Rigaud Solange   +10 more
doaj   +1 more source

Hot Forging of a Cladded Component by Automated GMAW Process [PDF]

open access: yes, 2010
Weld cladding is employed to improve the service life of engineering components by increasing corrosion and wear resistance and reducing the cost. The acceptable multi-bead cladding layer depends on single bead geometry.
BIGOT, Régis   +2 more
core   +6 more sources

Excluded-Volume Effects in Tethered-Particle Experiments: Bead Size Matters [PDF]

open access: yes, 2005
The tethered-particle method is a single-molecule technique that has been used to explore the dynamics of a variety of macromolecules of biological interest. We give a theoretical analysis of the particle motions in such experiments. Our analysis reveals
Darren E. Segall   +6 more
core   +3 more sources

Pleistocene Palaeoart of Africa

open access: yesArts, 2013
This comprehensive review of all currently known Pleistocene rock art of Africa shows that the majority of sites are located in the continent’s south, but that the petroglyphs at some of them are of exceptionally great antiquity. Much the same applies to
Robert G. Bednarik
doaj   +1 more source

Optimization of cell disruption in Raphidocelis subcapitata and Chlorella vulgaris for biomarker evaluation [PDF]

open access: yes, 2015
Raphidocelis subcapitata and Chlorella vulgaris are bioassay microalgae with rigid cellulosic cell wall which can hinder the release of intracellular proteins often studied as toxicity biomarkers.
Aderemi, Adeolu   +3 more
core   +3 more sources

Dynamic stereo microscopy for studying particle sedimentation [PDF]

open access: yes, 2014
We demonstrate a new method for measuring the sedimentation of a single colloidal bead by using a combination of optical tweezers and a stereo microscope based on a spatial light modulator.
Ashkin   +25 more
core   +1 more source

Making beads and bead making: an introduction [PDF]

open access: yesAzania: Archaeological Research in Africa
Beads are a prominent category of material culture in the African past. Crosscutting their study across temporal periods and geographical areas are some general methodological and theoretical convergences: the categorisation of beads in terms of materials and methods of manufacture, an emphasis on provenance and distribution, and the analysis of beads ...
Moffett, Abigail, Haour, Anne
openaire   +4 more sources

Fabrication and Structural, Mechanical, and Biological Characterization of Vancomycin-Loaded Chitosan-Hydroxyapatite-Gelatin Beads for Local Treatment of Osteomyelitis [PDF]

open access: yesJournal of Mazandaran University of Medical Sciences, 2023
Background and purpose: Topical antibiotic medication is an alternative method in treatment of local infections, especially osteomyelitis. Currently several biomaterials are used for this purpose.
Nafiseh Jirofti   +5 more
doaj  

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