Results 61 to 70 of about 879,533 (308)

The Land tenure in Northern Africa Challenges and opportunities

open access: yesAfrican Journal on Land Policy and Geospatial Sciences, 2018
In Northern Africa region, land administration and land management systems are characterized by the existence of various institutions and a diversity of land tenures.
Moha EL-AYACHI   +2 more
doaj   +2 more sources

A Compact Spin‐Coated Graphene UWB Antenna for Breast Tumor Detection

open access: yesAdvanced Engineering Materials, EarlyView.
A compact, spin‐coated graphene ultra‐wideband patch antenna designed for breast tumor detection, capable of distinguishing between malignant and benign tumors. This innovative antenna can serve as an effective initial screening tool, particularly in resource‐limited settings such as rural areas, where access to advanced medical equipment like MRI and ...
Raja Rashidul Hasan   +9 more
wiley   +1 more source

Do All Hemochromatosis Patients Have the Same Origin? A Pilot Study of Mitochondrial DNA and Y-DNA

open access: yesCanadian Journal of Gastroenterology, 2011
BACKGROUND: Mitochondrial DNA (mtDNA) and Y-DNA analysis have been widely used to predict ancestral origin. Genetic anthropologists predict that human civilizations may have originated in central Africa one to two million years previously.
Caitlin J Symonette, Paul C Adams
doaj   +1 more source

Linking horizontal and vertical transports of biomass fire emissions to the Tropical Atlantic Ozone Paradox during the Northern Hemisphere winter season: climatology [PDF]

open access: yes, 2003
International audienceDuring the Northern hemisphere winter season, biomass burning is widespread in West Africa, yet the total tropospheric column ozone values (
Jenkins, G. S., Ryu, J.-H.
core   +3 more sources

Global Nitrogen Deposition Promotes Carbon Sink Formation in Terrestrial Ecosystems

open access: yesAdvanced Science, EarlyView.
Nitrogen deposition alleviates ecosystem N limitation and enhances carbon sinks. Using 829 observations, we show 36% of deposited N is retained globally (39.15 Tg N yr−1), with distinct NHx and NOy contributions. This retention drives a terrestrial C sink of 0.88 Pg C yr−1 (25.48%), highlighting the importance of pool‐specific C:N stoichiometry ...
Lei Li   +6 more
wiley   +1 more source

Photochemical production of O3 in biomass burning plumes in the boundary layer over northern Australia [PDF]

open access: yes, 2003
In situ aircraft measurements of ozone (O3) and its precursors were made over northern Australia in August-September 1999 during the Biomass Burning and Lightning Experiment Phase B (BIBLE-B).
Blake, DR   +11 more
core   +1 more source

Corals and Reef‐Dwelling Fish Regulate Carbon Storage and Cycling Processes in Coral Reef Ecosystems

open access: yesAdvanced Science, EarlyView.
Coral reefs are biodiversity hotspots, yet their role in carbon storage and cycling remains poorly understood. Using field surveys and modeling in the South China Sea, we reveal the overlooked potential of carbon storage in reef ecosystems and how reef fish, corals, and surface sediment jointly shape reef carbon reservoirs.
Yiting Chen   +8 more
wiley   +1 more source

The genus Waltheria in southern Africa

open access: yesBothalia: African Biodiversity & Conservation, 1981
Waltheria indica L., the only species of Waltheria represented in southern Africa, is revised. This species, which occurs throughout the tropics and substropics of the world, is found abundantly in the northern Cape, Swaziland, northern Natal, Transvaal ...
I. C. Verdoorn
doaj   +1 more source

Time comparison via OTS-2 [PDF]

open access: yes, 1982
The time comparisons carried out via OTS-2 between the Technical University Graz (Austria) and the Van Swinden Laboratory Delft (Netherlands) are discussed.
Dejong, G.   +3 more
core   +1 more source

Global burden of human brucellosis : a systematic review of disease frequency [PDF]

open access: yes, 2012
BACKGROUND: This report presents a systematic review of scientific literature published between 1990-2010 relating to the frequency of human brucellosis, commissioned by WHO.
A El Sherbini   +40 more
core   +4 more sources

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