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Variation in piglet body weight gain and feed intake during a 9-week lactation in a multi-suckling system.
Animal
November 2022
Adaptation Physiology Group, Department of Animal Sciences, Wageningen University & Research, Wageningen, the Netherlands. Electronic address:
A multi-suckling (MS) system for sows and piglets has been developed aiming to improve animal welfare. In this system, large variation in BW gain exists between piglets up to weaning at 9 weeks of age. We aimed to study the causes of variation in BW gain and DM intake of solid feed (DFI) (piglet + sow feed) of piglets during lactation in the MS system.
View Article and Find Full Text PDFDistribution and Sources of n-Alkanes and Polycyclic Aromatic Hydrocarbons in Sediments Around Oil Production Facilities in the Escravos River Basin, Niger Delta, Nigeria.
Arch Environ Contam Toxicol
February 2021
School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Private Bag X54001, Durban, 4000, South Africa.
This study provides data on the characteristic levels, spatial patterns, sources, and risk of n-alkanes (AHs) [octane, n-C, to tetracontane, n-C] and polycyclic aromatic hydrocarbons (PAHs) in surficial sediments from the Escravos River Basin (ERB), Nigeria. The n-alkane and PAH concentrations in sediments were quantified by chromatographic methods. The concentrations of AHs and PAHs in the ERB sediments varied from 95 to 3430 µg g and from 0.
View Article and Find Full Text PDFPrevalence of ignitable liquids in clothing with printing.
Forensic Sci Int
July 2020
Bureau of Alcohol, Tobacco, Firearms and Explosives, Forensic Science Laboratory - San Francisco, 355 North Wiget Lane, Walnut Creek, CA 94598, United States. Electronic address:
In this study, 141 shirts were evaluated to determine the prevalence of ignitable liquids in printed shirts. Both new and worn shirts were included in this study. Volatile components extracted from the shirts were noted and many of the most commonly encountered components could be contributed to human skin or laundry, personal hygiene, or personal care products.
View Article and Find Full Text PDFExploring integument transcriptomes, cuticle ultrastructure, and cuticular hydrocarbons profiles in eusocial and solitary bee species displaying heterochronic adult cuticle maturation.
PLoS One
December 2019
Departamento de Biologia, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil.
Differences in the timing of exoskeleton melanization and sclerotization are evident when comparing eusocial and solitary bees. This cuticular maturation heterochrony may be associated with life style, considering that eusocial bees remain protected inside the nest for many days after emergence, while the solitary bees immediately start outside activities. To address this issue, we characterized gene expression using large-scale RNA sequencing (RNA-seq), and quantified cuticular hydrocarbon (CHC) through gas chromatography-mass spectrometry in comparative studies of the integument (cuticle plus its underlying epidermis) of two eusocial and a solitary bee species.
View Article and Find Full Text PDFCuticular hydrocarbons of the South American fruit fly Anastrepha fraterculus: variability with sex and age.
J Chem Ecol
September 2012
Institute of Organic Chemistry and Biochemistry of the AS CR, v.v.i., Flemingovo nám. 2, CZ-166 10 Prague 6, Czech Republic.
Insect cuticular hydrocarbons are usually species-specific mixtures and may serve for species and gender recognition. They are, therefore, widely used in the chemotaxonomy and zoogeography of various insect taxa. In order to provide a basic study for further comparative analyses of cuticular hydrocarbon (CHC) profiles of cryptic species hidden within the South American fruit fly Anastrepha fraterculus complex (Diptera: Tephritidae), we analyzed the composition of the CHCs and their production with respect to age and sex in a laboratory population from Tucuman, Argentina.
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