Results 91 to 100 of about 508,443 (311)

Comparative field‐scale assessment of TLUD and Kon‐Tiki biochar systems: agronomic performance and net CO2e‐based techno‐economics

Biofuels, Bioproducts and Biorefining, EarlyView.
Abstract Post‐harvest agricultural residues in Latin America are commonly underutilized, leading to greenhouse gas emissions and lost opportunities for bio‐based value creation. This study tests the hypothesis that decentralized, farmer‐scale pyrolysis technologies can deliver comparable agronomic benefits while exhibiting distinct techno‐economic and ...
Juan F. Saldarriaga, Thomas Käslin, Enara Fernández, Maider Amutio, Gartzen López, Laura Santamaria, Nausika Querejeta, Julián E. López   +7 more
wiley   +1 more source

La concepción de hombre entre los incas

Allpanchis, 2010
La idea de que los pobladores andinos anteriores a la presencia española creyeron que estaban compuestos por un cuerpo y un alma, y que esta última era la que los diferenciaba de los demás seres, se asume casi sin mayores cuestionamientos desde el siglo ...
Francisco Hernández Astete
doaj   +1 more source

Bordos and Boundaries: Sustainable Agriculture in the High Altitude Deserts of Northwest Argentina, AD 850-1532 [PDF]

, 2014
Bordos were essential for the long-term sustainability of agriculture in the high altitude desert of Antofagasta de la Sierra in Northwest Argentina during the Late (AD 850 – 1480) and Inca Period (AD 1480 – 1532).
Lane, Kevin John, Salminci, Pedro Miguel, Tchilinguirian, Pablo   +2 more
core   +1 more source

Extent, characteristics and policy applications of Key Biodiversity Areas

Biological Reviews, EarlyView.
ABSTRACT A global standard for the identification of Key Biodiversity Areas (KBAs) was published 10 years ago to provide a unified set of criteria for identifying ‘sites of significance for the global persistence of biodiversity’. We review the initiative's origins, the KBA identification process, characteristics of the current network, threats, policy
Stuart H. M. Butchart, Olivia Crowe, Tom Scott, Andrew J. Plumptre, Megan Eldred, Ellen McKee, Zoltan Waliczky, Ibrahim Al Hasani, Adrián B. Azpiroz, Daniele Baisero, Fred Barasa, Alison E. Beresford, Bezeng S. Bezeng, Charlotte Boyd, Thomas M. Brooks, Graeme Buchanan, Gill Bunting, Sofia Capellan, Neil Cox, Tim R. B. Davenport, Tammy E. Davies, Gina Della Togna, Wendy Elliott, Matt Foster, Jo Gilbert, Jonathan M. Handley, Diego Juffe‐Bignoli, Victoria R. Jones, Naomi Kingston, Jeannot Kivono, John Lamoreux, Penny F. Langhammer, James Lewis, Bruce Liggitt, Daniel Marnewick, Paul Matiku, Erin McCreless, Rachel A. Neugarten, Catherine Numa, Mark O'Brien, Madhu Rao, Ciara Raudsepp‐Hearne, Justina C. Ray, Samridhi Rijal, Jon Paul Rodríguez, Jurgis Sapijanskas, Wes Sechrest, Martin Sneary, Andrew Snyder, Konstantina Spiliopoulou, Thomas Starnes, Cecilia Tobar, Gautam Surya, Marcelo F. Tognelli, Andrew W. Tordoff, Maria G. Toscano, Yongyut Trisurat, Amy Upgren   +57 more
wiley   +1 more source

A neoproterozoic age for the chromitite and gabbro of the Tapo Ultramafic Massif, Eastern Cordillera, Central Peru, and its tectonic implications [PDF]

, 2011
The ultramafic-mafic rocks of the Tapo Complex are exposed in the Eastern Cordillera of the Central Peruvian Andes. This complex is composed of serpentinised peridotites and metabasites with some podiform chromitite lenses and chromite disseminations and
Amaral, Baldo, Castroviejo, Castroviejo, Cawood, Chew, Colombo C.G. Tassinari, Dalmayrac, Dalziel, Eurico Pereira, Fuck, Irvine, Jorge Acosta, Jose F. Rodrigues, Le Maitre, Ludwig, Megard, Palme, Pearce, Pedrosa-Soares, Ramos, Ramos, Ramos, Ricardo Castroviejo, Sato, Steiger   +25 more
core   +3 more sources

Nichtlineare Staubungsneigung binärer Schüttgutmischungen: Herausforderungen bei der Prognose Non‐linear dusting tendency of binary bulk material mixtures: Challenges in prognosis

Chemie Ingenieur Technik, EarlyView.
Aufgrund überlagerter oder konkurrierender Mechanismen sind relevante Wechselwirkungen bei der Staubung von Schüttgutmischungen komplex und nur unzureichend verstanden. Selbst für Mischungen aus umfassend charakterisierten Einzelkomponenten existieren keine belastbaren Modelle. In dieser Arbeit werden die Hürden bei der Prognose thematisiert.
David Horst, Anke Helfer, Eberhard Schmidt   +2 more
wiley   +1 more source

A uniform isotopic and chemical signature of dust exported from Patagonia: Rock sources and occurrence in southern environments [PDF]

, 2007
Patagonia is considered to be the most important source of dust from South America that is deposited in surrounding areas, and we present here a systematic Sr and Nd isotopic study of sediment currently being exported.
Brunet, Frédéric, Depetris, Pedro J., Gaiero, Diego M., Probst, Jean-Luc   +3 more
core   +3 more sources

Vergleichende Untersuchung der Eigenschaften recycelter Kohlenstofffasern Comparative investigation of the properties of recycled carbon fibers

Chemie Ingenieur Technik, EarlyView.
Die Akzeptanz recycelter Kohlenstofffasern in der Industrie erfordert eine hohe und standardisierte Faserqualität. In diesem Artikel werden mechanische Eigenschaften sowie die Oberflächenqualität neuer und recycelter Kohlenstofffasern ermittelt und verglichen, um Optimierungspotentiale für das CFK‐Recycling abzuleiten.
Philipp Karsten Niebel, Violetta Schumm, Mareen Zöllner, Thomas Krampitz, Holger Lieberwith, Marcel Zeisberg, Enrico Baumgärtel, Jens Bachmann   +7 more
wiley   +1 more source

The Chanka: Archaeological Research in Andahuaylas (Apurimac), Peru [PDF]

, 2010
In AD 1438 a battle took place outside the city of Cuzco that changed the course of South American history. The Chanka, a powerful ethnic group from the Andahuaylas region, had begun an aggressive program of expansion.
Aráoz Silva, Miriam, Bauer, Brian S., Kellett, Lucas C.   +2 more
core  

Does the unemployment benefit institution affect the productivity of workers? Evidence from a field experiment [PDF]

, 2013
We investigate whether and how the type of unemployment benefit institution affects productivity. We designed a field experiment to compare workers' productivity under a welfare system, where the unemployed receive an unconditional monetary transfer ...
Blanco, Mariana, Dalton, Patricio S., Vargas, Juan F.   +2 more
core   +2 more sources