Results 21 to 30 of about 13,772,771 (329)

Children of Immigrants: The Changing Face of Metropolitan America [PDF]

open access: yes, 2011
Examines trends in the populations of immigrants and children of immigrants in the hundred largest metropolitan areas, including growth in numbers and as a share of the overall population, racial/ethnic composition, age, and variations among metro ...
Ajay Chaudry, Karina Fortuny
core   +1 more source

A general theory of age-length keys: combining the forward and inverse keys to estimate age composition from incomplete data

open access: yesICES Journal of Marine Science, 2019
There are two approaches to estimating age composition from a large number of length observations and a limited number of age determinations: the forward and the inverse age-length keys.
L. Ailloud, J. Hoenig
semanticscholar   +1 more source

Uncertainties in sampling procedures for age composition of hake and sardine in Iberian Atlantic waters

open access: yesScientia Marina, 2004
Estimates of the age composition of hake (demersal) and sardine (pelagic) in Iberian Atlantic waters in 1999 are analysed, paying specific attention to sampling variability.
Ernesto Jardim   +2 more
doaj   +1 more source

Common ash (Fraxinus excelsior L.) in Ukrainian forests and its successful natural regeneration

open access: yesMetsanduslikud Uurimused, 2021
The natural distribution area of common ash (Fraxinus excelsior L.) in the forests of Europe and Ukraine has been determined through the analysis of scientific works of Ukrainian and foreign researchers.
Tkach Viktor   +6 more
doaj   +1 more source

Phylogenetic analysis of the relict species Dryopteris filix-mas (L.) Schott. by the chloroplast gene (rbcL) and features of modern ontogenesis on the Mangistau Peninsula, Kazakhstan [PDF]

open access: yesCaspian Journal of Environmental Sciences
The article presents the study results of the populations of the relict species Dryopteris filix-mas (L.) Schott on the territory of the Tyubkaragan Peninsula in the Mangistau region, Kazakhstan.
Akzhunis Imanbayeva   +6 more
doaj   +1 more source

Impact of migration, natural population change and age composition on the redistribution of the population in Sweden 1970 - 1996

open access: yesCybergeo, 2000
This study examines the population redistribution in Sweden at the municipality level between 1970 and 1996. The aims of this study are to analyse: (1) the importance of migration and geographical variations in fertility and mortality for the ...
Johan Håkansson
doaj   +1 more source

Influence of cement matrix composition on early age shrinkage properties [PDF]

open access: yesMATEC Web of Conferences, 2022
Early age shrinkage behaviour is an important factor in determining durability properties of cementitious composites. Shrinkage occurs in cement paste, but it can be tested in paste, mortar, and concrete. Differences in results obtained can be due to the
Didulica Katarina, Baričević Ana
doaj   +1 more source

Body fatness or anthropometry for assessment of unhealthy weight status? Comparison between methods in South African children and adolescents [PDF]

open access: yes, 2013
A variety of methods are available for defining undernutrition (thinness/underweight/under-fat) and overnutrition (overweight/obesity/over-fat). The extent to which these definitions agree is unclear.
Armstrong   +6 more
core   +1 more source

Age-related changes in blood biochemical composition of Hu sheep

open access: yesItalian Journal of Animal Science, 2022
The blood biochemical composition is indicative of the animal's performance and health status. This study evaluated the interaction between age and blood metabolites, immunoglobulins, hormones in Hu sheep. In total 30 male lambs between 1, 2, 3, 6 and 12 
Mahmoud M. Abdelsattar   +2 more
doaj   +1 more source

The Impact of Maternal Age on Human Milk Composition

open access: yesBiomedical Sciences and Clinical Medicine, 2022
Human milk provides both nutritional and non-nutritional benefits to infants and can meet an infant’s nutritional needs for the first six months of life.
Li Xuejing, Krongporn Ongprasert
doaj   +1 more source

Home - About - Disclaimer - Privacy