Results 31 to 40 of about 10,486,597 (353)

Variations in the Volatile Compositions of Curcuma Species [PDF]

open access: yesFoods, 2019
Curcuma species have been cultivated in tropical and subtropical regions in Asia, Australia, and South America for culinary as well as medicinal applications. The biological activities of Curcuma have been attributed to the non-volatile curcuminoids as well as to volatile terpenoids.
Noura S. Dosoky   +2 more
openaire   +3 more sources

Tree cover and species composition effects on academic performance of primary school students

open access: yesPLoS ONE, 2018
Human exposure to green space and vegetation is widely recognized to result in physical and mental health benefits; however, to date, the specific effects of tree cover, diversity, and species composition on student academic performance have not been ...
Sivajanani Sivarajah   +2 more
semanticscholar   +1 more source

A comparison of presettlement and modern forest composition along an elevation gradient in central New Hampshire [PDF]

open access: yes, 2011
Tree species composition is influenced not only by edaphic and climatic factors but also by natural and human-caused disturbances. To understand interactions among these influences, we compared forest species composition data from the time of European ...
Cogbill, Charles V.   +3 more
core   +3 more sources

Phylogeography above the species level for perennial species in a composite genus [PDF]

open access: yesAoB PLANTS, 2015
Abstract In phylogeography, DNA sequence and fingerprint data at the population level are used to infer evolutionary histories of species. Phylogeography above the species level is concerned with the genealogical aspects of divergent lineages.
Tremetsberger, Karin   +6 more
openaire   +5 more sources

Habitat type, food resources, noise and light pollution explain the species composition, abundance and stability of a winter bird assemblage in an urban environment

open access: yesUrban Ecosystems, 2017
At present, urban areas cover almost 3% of the Earth’s terrestrial area, and this proportion is constantly increasing. Although urbanization leads to a decline in biodiversity, at the same time it creates extensive habitats that are exploited by an ...
M. Ciach, A. Fröhlich
semanticscholar   +1 more source

CURRENT STATE OF POPULATION OF GAME MAMMALS HABITING SHELKOVSKOY DISTRICT OF CHECHNYA AND WAYS FOR OPTIMIZATION

open access: yesЮг России: экология, развитие, 2015
Aim. The goal of the research is that: to identify the taxonomic composition of game species and make full list of species to assess the current state of populations and resources to carry out eco-faunistic analysis of the distribution of game mammals ...
A. M. Batkhiyev, H. S. Yandakrhanov
doaj   +1 more source

Alkaloid Composition of the Nicotiana Species [PDF]

open access: yesContributions to Tobacco & Nicotine Research, 1990
Abstract Plants from 64 Nicotiana species were sampled in the greenhouse in 1983 and 1984 and from the field in 1985 and 1986 for the purpose of developing a chemical profile of each species. Mature green leaves were harvested at flowering, freeze-dried and ground to pass a 1 mm screen prior to chemical analysis.
Sisson VA, Severson RF
openaire   +2 more sources

Integrating effects of species composition and soil properties to predict shifts in montane forest carbon–water relations

open access: yesProceedings of the National Academy of Sciences of the United States of America, 2018
Significance This research focuses on how species composition and soil properties interact to control carbon fixation and water loss in California’s montane forests.
T. Maxwell   +2 more
semanticscholar   +1 more source

ASSESSMENT OF THE CURRENT STATE OF BENTHIC FAUNA AND WATER QUALITY OF CHANNELS OF THE VOLGA DELTA

open access: yesЮг России: экология, развитие, 2016
Aim. We present the findings of studies of the current state of benthic fauna of the Volga delta channels by the structure of benthic communities.
O. G. Tarasova, V. F. Zaitsev
doaj   +1 more source

Biogeography of Amazon birds: rivers limit species composition, but not areas of endemism

open access: yesScientific Reports, 2017
Amazonian rivers are usually suggested as dispersal barriers, limiting biogeographic units. This is evident in a widely accepted Areas of Endemism (AoEs) hypothesis proposed for Amazonian birds.
Ubirajara Oliveira   +2 more
semanticscholar   +1 more source

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