Results 41 to 50 of about 666,855 (310)

Evaluación de la toxicidad en aguas residuales industriales tratadas por procesos biológicos utilizando bacterias luminiscentes.

Actualidades Biológicas, 2016
La toxicidad de las aguas residuales provenientes de empresas de procesamiento de productos cárnicos fue evaluada antes y después del tratamiento usando un reactor secuencial por lotes (SBR). Las pruebas de toxicidad fueron evaluadas mediante el análisis
Diana C. Rodríguez-Loaiza, Omaira Ramírez-Henao, Gustavo A. Peñuela-Mesa   +2 more
doaj   +1 more source

Tribological Performance of 60NiTi Alloy Under Varying Contact Conditions and Elevated Temperatures in Linear Reciprocating Sliding

Advanced Engineering Materials, EarlyView.
This study investigates the tribological response of 60NiTi alloy under dry, water‐lubricated and high‐temperature conditions. The alloy exhibits decreasing wear volume and friction with increasing temperature due to the formation of protective oxide layers. The work clarifies dominant wear mechanisms and demonstrates the suitability of 60NiTi for high‐
Anthony Onyebuchi Okoani, Miguel Angel Selles, Maziar Ramezani   +2 more
wiley   +1 more source

In vitro culture of L3 larvae of nematodes obtained from the African giant snail Lissachatina fulica (Mollusca: Gastropoda) in Santa Fe de Antioquia

Biomédica: revista del Instituto Nacional de Salud, 2018
Introduction: Over 170 municipalities in Colombia have been invaded by Lissachatina fulica, an African snail that can carry larvae of nematodes of interest in human and veterinary health.
Nelly Solfania Heredia, Ann Sabrina Ávila, Luz Elena Velásquez   +2 more
doaj   +1 more source

Contabilidad y control ambiental

Lúmina, 2010
Durante la mayor parte de la historia humana la problemática ambiental ha sido ignorada a partir de la consideración de unos recursos naturales infinitos. En la economía clásica el problema es abordado por primera vez por el economista Thomas Robert Malthus, pero sus planteamientos sólo alcanzaron censuras sociales y con posterioridad el asunto se ...
openaire   +1 more source

Pagamentos por serviços ambientais : instrumento custo efetivo na aplicação do requisíto legal ambiental? [PDF]

, 2017
Este trabalho teve objetivo principal apresentar uma reflexão com vistas a discutir se o pagamento por serviços ambientais (PSA), quando combinado com instrumentos de comando e controle, é capaz de gerar o incentivo necessário para garantir o cumprimento
Neto, Claudiano Carneiro da Cruz, Rosa, Thales Oliveira   +1 more
core   +1 more source

Marked decline in forest-dependent small mammals following habitat loss and fragmentation in an Amazonian deforestation frontier [PDF]

, 2020
Agricultural frontier expansion into the Amazon over the last four decades has created million hectares of fragmented forests. While many species undergo local extinctions within remaining forest patches, this may be compensated by native species from ...
Palmeirim, Ana Filipa, Peres, Carlos A., Santos-Filho, Manoel   +2 more
core   +1 more source

Reduction of Oxide Inclusions During the High‐Frequency Welding of Steel via a Nonthermal Ar/H2 Plasma Jet

Advanced Engineering Materials, EarlyView.
High‐frequency (HF) welding of steel is limited by oxide inclusions that degrade weld quality. This study demonstrates, for the first time, the integration of a nonthermal Ar/H2 dielectric barrier discharge (DBD) plasma jet into HF welding. Local plasma treatment provides effective shielding and in‐situ oxide reduction, resulting in markedly fewer and ...
Viktor Udachin, Lienhard Wegewitz, René Gustus, Henning Wiche, Wolfgang Maus‐Friedrichs   +4 more
wiley   +1 more source

Tendencia de 2005 a 2010 de los niveles de Clembuterol en muestras de bovinos en Guerrero, México

Revista Mexicana de Ciencias Pecuarias, 2018
Este estudio se realizó entre 2005 y 2010 en las siete jurisdicciones sanitarias del estado de Guerrero, mediante la recolección de 1,221 muestras para el análisis de clembuterol.
Luis Alberto Chávez Almazán, Jesús Antonio Díaz Ortiz, Beatriz Pérez Cruz, Mario Alberto Alarcón Romero   +3 more
doaj   +1 more source

Market-based Instruments for Environmental Policymaking in Latin America and the Caribbean: Lessons from Eleven Countries [PDF]

, 1998
This report is a summary of country studies in Latin America and the Caribbean, addressing the use of market-based instruments (MBIs) and command-and-control (CAC) measures for environmental management in the region.
Jack Ruitenbeek, Richard M. Huber, Ronaldo Motta   +2 more
core  

Handbook of Establishing and Maintaining Oxygen‐Free Atmospheres

Advanced Engineering Materials, EarlyView.
This study presents a practical framework for creating oxygen‐free atmospheres at ambient pressure using silane‐doped inert gases. The results show that ultra‐low oxygen levels and strongly reduced water content can be achieved through controlled silane dosing, drying systems, and sensor monitoring.
Sascha Jan Zimmermann, René Gustus, Lienhard Wegewitz, Wolfgang Maus‐Friedrichs   +3 more
wiley   +1 more source