Results 101 to 110 of about 4,689,515 (328)

Were rivers flowing across the Sahara during the last interglacial? Implications for human migration through Africa. [PDF]

, 2013
Human migration north through Africa is contentious. This paper uses a novel palaeohydrological and hydraulic modelling approach to test the hypothesis that under wetter climates c.100,000 years ago major river systems ran north across the Sahara to the ...
Barton, Nick, Brücher, Tim, Coulthard, Tom J., Ramirez, Jorge A., Rogerson, Mike   +4 more
core   +2 more sources

Efferocytosis‐Driven Polyamine Metabolism in Macrophages Enhances Cancer Stem Cell Enrichment after Chemotherapy in Ovarian Cancer

Advanced Science, EarlyView.
Chemotherapy‐induced efferocytosis drives ovarian cancer stem cell enrichment. By engulfing apoptotic cancer cells, macrophages upregulate ODC1 and produce putrescine, which elevates osteopontin (OPN) expression. Secreted OPN then activates the CD44 receptor on cancer cells, promoting stemness and chemoresistance.
Wenhan Li, Feiquan Ying, Xinkai Pang, Qiulei Wu, Guoqing Li, Lin Huang, Jiayu Xin, Xiaoli Liu, Pan Liu, Xiaohan Xu, Shuran Tan, Yumei Gao, Tong Liu, Si Sun, Xiaoman Wang, Yiping Wen, Liqiong Cai, Shi Du, Yuan Zhang, Jing Cai   +19 more
wiley   +1 more source

Livestock Tango: U.S. and Latin America Dance Together, but Who Will Lead?

Applied Economic Perspectives and Policy, EarlyView.
ABSTRACT This study examines the competitiveness between Latin American and U.S. livestock and meat sectors. We employ a computable general equilibrium modeling framework to evaluate two scenarios: coordinated improvements in Latin American productivity, transport efficiency, and market access (Scenario I), and the minimum productivity gains required ...
Taís C. Menezes, Amanda M. Countryman, Dustin L. Pendell   +2 more
wiley   +1 more source

Motivasi India Menjalin Kerjasama Ekonomi dengan Negara-negara Afrika [PDF]

, 2014
Africa is the poorest continent with economic growth is relatively slow compared to other countries. This is because since the beginning of its independence from western colonialism, Africa was hit by the prolonged conflict.
Rani, F. (Faisyal), Rinaldi, R. (Rinaldi)   +1 more
core  

Temperature and Farm Labor in Nigeria

Applied Economic Perspectives and Policy, EarlyView.
ABSTRACT We estimate the impact of temperature shocks on the composition of farm labor in rural Nigeria using a nationally representative household panel survey. Leveraging plausibly exogenous year‐to‐year variation in growing season temperatures, we find that warmer temperatures significantly alter farm labor composition, prompting a substantial shift
Andu Berha
wiley   +1 more source

Think Piece: Working for Living - Popular Education as/at Work for Social-ecological Justice

Southern African Journal of Environmental Education, 2020
Drawing on the working lives of popular educators who are striving for socioeconomic and socio-ecological justice, we demonstrate how popular education is a form of care work which is feminised, often undervalued and unrecognised as highly skilled work.
Jane Burt , Anna Katharine James, Shirley Walters, Astrid von Kotze   +3 more
doaj  

Effect Differences of Omega‐3 Fatty Acids From Plant Oil and Fish Oil on Human Health

AgriFood: Journal of Agricultural Products for Food, EarlyView.
Omega‐3 fatty acids in plant oil is no less than fish oil on human health. ALA in plant oil takes directly healthy effects without conversion to DHA and EPA. Plant oil can be substitutes for fish oil to support partial ω‐3 fatty acids. For people who cannot afford fish oil, plant oil is also good for public health.
Mengxue Fang, Chunyan Xiang, Liangxiao Zhang, Peiwu Li   +3 more
wiley   +1 more source

How well are families doing? A description of family well-being in South Africa

Family Medicine and Community Health, 2016
Objective: The purpose of this study was to describe the well-being of a sample of families from low socioeconomic communities in the Western Cape South Africa in terms of family resilience, family satisfaction, parenting styles, family structure and ...
Nicolette Vanessa Roman, Serena Ann Isaacs, Charl Davids, Xin-Cheng Sui   +3 more
doaj   +1 more source

Genetic comparisons of fall armyworm populations from 11 countries spanning sub-Saharan Africa provide insights into strain composition and migratory behaviors

Scientific Reports, 2019
The recent discovery of fall armyworm (Spodoptera frugiperda, J.E. Smith) in Africa presents a significant threat to that continent’s food security.
R. Nagoshi, G. Goergen, H. Plessis, J. van den Berg, R. Meagher   +4 more
semanticscholar   +1 more source

Trade trends from 2000 to 2008 for agriculture, forestry and fisheries of the Western Cape [PDF]

This paper aims to identify trade trends for primary products from the Western Cape agricultural, forestry and fisheries sector for the period 2000 until 2008. Annual trade data was received from the South African Revenue Service (SARS).
Jacobs, Elne, Punt, Cecilia
core   +1 more source