Results 101 to 110 of about 2,902,945 (357)

Are There Too Many Farms in the World? Labor Market Transaction Costs, Machine Capacities, and Optimal Farm Size

Journal of Political Economy, 2017
We show that labor market transaction costs explain why the smallest farms are more efficient than slightly larger farms in most low-income countries and that increases in machine capacity with operational scale result in the globally observed rising ...
Andrew D. Foster, M. Rosenzweig
semanticscholar   +1 more source

Sertoli Cell‐Derived Extracellular Vesicles Orchestrate Cadmium‐Induced Testicular Inflammation and Fibrosis

Advanced Science, EarlyView.
Environmental cadmium exposure disrupts testicular homeostasis through a novel intercellular communication axis. Stressed Sertoli cells release extracellular vesicles carrying damage‐associated molecular patterns and mitochondrial fragments, which activate macrophages via TLR4/NF‐κB signaling.
Jianfeng Ma, Mailin Gan, Shuang Liang, Siyu Chen, Ziling Hao, Yiting Yang, Jiawei Lu, Qihang Wu, Yuqian Shi, Lijun Sun, Jiaxin Li, Saihao Wang, Yan Wang, Xiaofeng Zhou, Lei Chen, Ye Zhao, Li Zhu, Linyuan Shen   +17 more
wiley   +1 more source

Large Farm Establishment, Smallholder Productivity, Labor Market Participation, and Resilience: Evidence from Ethiopia

, 2016
Although the nature and magnitude of (positive or negative) spillovers from large farm establishment are hotly debated, most evidence relies on case studies.
Daniel Ayalew Ali, K. Deininger, C. Harris   +2 more
semanticscholar   +1 more source

The Faraday Scalpel: Electrochemical Nerve Lesioning Mechanisms Studied in Invertebrate Models

Advanced Science, EarlyView.
Direct‐current produces nerve lesioning through discrete electrochemical reactions. Using hypoxia‐sensitive locust nerves and hypoxia‐tolerant leech nerves, we map three injury pathways: cathodic oxygen reduction, cathodic alkalization, and anodic chloride oxidation. These findings establish electrochemical lesioning—the “Faraday Scalpel”—as a precise,
Petra Ondráčková, Jan Švec, Marie Jakešová, Jiří Ehlich, Imrich Gablech, Eric Daniel Głowacki   +5 more
wiley   +1 more source

Socioeconomic Assessment of No-Till In Wheat Cropping System: A Case Study in Algeria

New Medit, 2019
This paper aimed at the socioeconomic appraisal of two cropping systems namely no-till and tilled wheat in Sétif region (Algeria). The study based on a sample of 28 adherent farms in an international project of Conservation Agriculture adoption for ...
Amar ROUABHI, Abdelmalek LAOUAR, Abdelhamid MEKHLOUK, Boubaker DHEHIBI   +3 more
doaj   +1 more source

Cost of porcine reproductive and respiratory syndrome virus at individual farm level - An economic disease model.

Preventive Veterinary Medicine, 2017
Porcine reproductive and respiratory syndrome (PRRS) is reported to be among the diseases with the highest economic impact in modern pig production worldwide.
Heiko Nathues, P. Alarcón, Jonathan Rushton, Rika Jolie, K. Fiebig, M. Jiménez, V. Geurts, C. Nathues   +7 more
semanticscholar   +1 more source

Market Sharing and Price Leadership [PDF]

This paper proposes an alternative to the traditional model of supply and demand in markets where consumers take prices as given. Within the framework of “no side payments and partial preplay communication” firms are assumed to decide non-cooperatively ...
Farm, Ante
core  

Multi‐Omics Insights Into the Mechanisms of Early Muscle Fiber Difference and Transformation Between Lean‐Type and Chinese Indigenous Pigs

Advanced Science, EarlyView.
Multi‐omics analyses uncover breed‐specific cis‐regulatory landscapes and higher‐order chromatin architectural differences that underlie early postnatal muscle fiber divergence in pigs. A super‐enhancer upstream of PPP3CB recruits MEF2C to activate PPP3CB transcription, while the PPP3CB–MEF2C positive feedback loop promotes oxidative muscle fiber ...
Shuailong Zheng, Hainan Wu, Min Liu, Kunpeng Wu, Shuntao Huang, Zulfiqar Ahmed, Lenox Pius, Mengjin Zhu, Dequan Xu   +8 more
wiley   +1 more source

Broiler farm size in relation tot sustainability aspects [PDF]

, 2010
In the Netherlands the number of broiler farms has been reduced by 50%, while farm size doubled between 1990 and 2008. A debate on the positive and negative aspects of large farms emerge.
Horne, P.L.M., van, Leenstra, F.R.
core   +1 more source

Mechanosensitive Piezo1/Osteocalcin/Irisin Axis Protects Against Disuse‐Induced Muscle Atrophy

Advanced Science, EarlyView.
Mechanical unloading suppresses bone Piezo1 expression, which reduces circulating undercarboxylated osteocalcin (unOCN). unOCN reduction subsequently exacerbates IMM‐induced Fndc5/Irisin decrease and drives severe muscle atrophy. Bone Piezo1 activation or exogenous osteocalcin/Irisin ameliorate muscle atrophy, while muscle‐specific Gprc6a or Fndc5 ...
Zhaolu Wang, Xiuying Jiang, Xi Sun, Hao Chen, Jianjun Jin, Xin'e Shi   +5 more
wiley   +1 more source