Results 31 to 40 of about 1,991,563 (339)

Discrete Gauge Groups in F-theory Models on Genus-One Fibered Calabi-Yau 4-folds without Section [PDF]

open access: yes, 2017
We determine the discrete gauge symmetries that arise in F-theory compactifications on examples of genus-one fibered Calabi-Yau 4-folds without a section.
Kimura, Yusuke
core   +2 more sources

Nitrogen Transformations in Broiler Litter-Amended Soils

open access: yesInternational Journal of Agronomy, 2012
Nitrogen mineralization rates in ten surface soils amended with (200 μg N g−1 soil) or without broiler litter were investigated. The soil-broiler litter mixture was incubated at 25±1∘C for 28 weeks.
Kokoasse Kpomblekou-A, Andrae Genus
doaj   +1 more source

South American Melolonthinae (Coleoptera: Scarabaeidae) classification and nomenclature: some problems and solutions [PDF]

open access: yes, 2008
Classificatory changes are made for some taxa of New World Melolonthinae based on the examination of specimens (including type specimens) and a reevaluation of some of the characters used to justify previous classification decisions.
Smith, Andrew B. T.
core   +2 more sources

Selective advantage of implementing optimal contributions selection and timescales for the convergence of long-term genetic contributions

open access: yesGenetics Selection Evolution, 2018
Background Optimal contributions selection (OCS) provides animal breeders with a framework for maximising genetic gain for a predefined rate of inbreeding.
David M. Howard   +4 more
doaj   +1 more source

Riemann-Roch theorems and elliptic genus for virtually smooth Schemes [PDF]

open access: yes, 2007
For a proper scheme X with a fixed 1-perfect obstruction theory, we define virtual versions of holomorphic Euler characteristic, chi y-genus, and elliptic genus; they are deformation invariant, and extend the usual definition in the smooth case. We prove
Barbara Fantechi   +8 more
core   +2 more sources

Why breed disease-resilient livestock, and how?

open access: yesGenetics Selection Evolution, 2020
Background Fighting and controlling epidemic and endemic diseases represents a considerable cost to livestock production. Much research is dedicated to breeding disease resilient livestock, but this is not yet a common objective in practical breeding ...
Pieter W. Knap, Andrea Doeschl-Wilson
doaj   +1 more source

The effects of PRRS on the environmental impact of pig production: a life cycle assessment study

open access: yesFrontiers in Veterinary Science
The Porcine Reproductive and Respiratory Syndrome (PRRS) is a viral pig disease that increases mortality rates and reduces (re)production performance.
Greg J. Thoma   +5 more
doaj   +1 more source

A Life Cycle Assessment Study of the Impacts of Pig Breeding on the Environmental Sustainability of Pig Production

open access: yesAnimals
Lifecycle assessment (LCA) quantified changes in environmental impact categories (global warming, eutrophication, etc.) from 2021 to 2030 due to genetic trends in (re)production traits in pig lines of the breeding company Genus-PIC.
Greg J. Thoma   +2 more
doaj   +1 more source

Reciprocal control of viral infection and phosphoinositide dynamics

open access: yesFEBS Letters, EarlyView.
Phosphoinositides, although scarce, regulate key cellular processes, including membrane dynamics and signaling. Viruses exploit these lipids to support their entry, replication, assembly, and egress. The central role of phosphoinositides in infection highlights phosphoinositide metabolism as a promising antiviral target.
Marie Déborah Bancilhon, Bruno Mesmin
wiley   +1 more source

Genetic parameters for pelvic organ prolapse in purebred and crossbred sows

open access: yesFrontiers in Genetics
This study aimed to investigate genetic parameters for sow pelvic organ prolapse in purebred and crossbred herds. Pelvic organ prolapse was recorded as normal or prolapsed on the individual sow level across 32 purebred and 8 crossbred farms. In total, 75,
Ching-Yi Chen   +6 more
doaj   +1 more source

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