Results 81 to 90 of about 579,495 (286)

Permeability of Sand-bentonite and Sand-fly  Ash Mixtures

open access: yesAsian Journal of Water, Environment and Pollution, 2014
Laboratory hydraulic conductivity (HC) tests have been conducted on mixtures of fine sand with bentonite and fly ash with four fluids with different pH and metal concentrations with a view to assess their suitability for liner constructions for waste containment facilities.
null Shankara   +2 more
openaire   +1 more source

Leishmaniasis transmission biology: Role of Promastigote Secretory Gel as a transmission determinant [PDF]

open access: yes
Leishmaniasis is a complex vector-borne disease caused by Leishmania sp. (Kinetoplastida: Trypanosomatidae) and is transmitted by female sand flies (Diptera: Psychodidae).
Martin Sainz de la Maza, O
core   +1 more source

Effect on the properties of fresh and hardened concrete made using fly ash geopolymer sand

open access: yes, 2021
Fly ash-based geopolymer fine aggregate is a potential replacement material for the natural river sand as it has similar physicochemical properties.
Thankam, Lizia G.   +2 more
core   +1 more source

Breeding switchgrass for reduced nitrogen demand

open access: yesGrassland Research, EarlyView.
Breeding has improved switchgrass biomass yield, but productivity is still heavily dependent on nitrogen fertilizer application. The genetic diversity needed to improve nitrogen use efficiency of switchgrass remains underused, mainly because of the slow and laborious breeding process, thus leaving the crop's high nitrogen demand as a major barrier to ...
Michael D. Casler, Prabin Bajgain
wiley   +1 more source

Leishmania sand fly interaction: progress and challenges [PDF]

open access: yesCurrent Opinion in Microbiology, 2008
Complex interactions occurs between Leishmania parasites and their sand fly vectors. Promastigotes of Leishmania live exclusively within the gut, possess flagella and are motile, and kinesins, kinases and G proteins have been described that play a role in regulating flagellar assembly.
openaire   +2 more sources

Insect communities of late Pleistocene steppe–tundra and Holocene boreal forest ecosystems in central Yukon Territory, Canada

open access: yesJournal of Quaternary Science, EarlyView.
ABSTRACT Subfossil insect communities from the Quartz Creek site provide a detailed record of both Late Pleistocene steppe–tundra and Holocene boreal forest ecosystems in central Yukon Territory, Canada. Fifteen Pleistocene assemblages (marine isotope stages [MIS] 4 to 2) are dominated by steppe–tundra and dry‐tundra taxa, particularly the weevils ...
Scott L. Cocker   +4 more
wiley   +1 more source

The compressive strength of fly ash concrete and its mineralogy [PDF]

open access: yes, 1994
Includes bibliographical references.The use of fly ash as a cement extender in portland cement concrete is well established. Strict requirements are set for the fly ash on its physical properties and chemical composition to ensme its successful ...
Gogol, Volker R
core   +1 more source

Validating antler‐ and movement‐based estimates of caribou reproduction using video camera collars Validation des estimations de la reproduction du caribou basées sur la rétention des bois et  sur le déplacement à l'aide de colliers‐caméras

open access: yesThe Journal of Wildlife Management, EarlyView.
We used GPS video camera collar data from barren‐ground caribou in the Porcupine and Western Arctic herds to validate antler‐ and movement‐based methods for estimating annual reproductive metrics. Antler retention was highly accurate for estimating parturition, but the movement methods we tested performed marginally for estimating parturition and ...
Heather E. Johnson   +6 more
wiley   +1 more source

Habitat analysis of North American sand flies near veterans returning from leishmania-endemic war zones

open access: yesInternational Journal of Health Geographics, 2008
Background Nearly 1300 cases of leishmaniasis have been identified in American military personnel deployed to Iraq and Afghanistan. The symptoms of this disease can range from a mild, self-limiting cutaneous infection to a deadly visceral infection and ...
Keep Lisa   +3 more
doaj   +1 more source

First 20 Years of Orbitrap Mass Spectrometry as the Mainstream Analytical Technique

open access: yesMass Spectrometry Reviews, EarlyView.
ABSTRACT This review traces the first 20 years of Orbitrap mass spectrometry as a mainstream high‑resolution and accurate‑mass (HR/AM) technology. It outlines the historical development of the Orbitrap analyzer, the evolution of major instrument families, and the key technological innovations that enabled its widespread adoption. Particular emphasis is
Alexander Makarov
wiley   +1 more source

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