Results 81 to 90 of about 2,036,223 (195)

Kinematics of hovering hummingbird flight along simulated and natural elevational gradients [PDF]

open access: yes, 2003
Hovering flight is one of the most energetically demanding forms of animal locomotion. Despite the cost, hummingbirds regularly hover at high elevations, where flight is doubly challenging because of reduced air density and oxygen availability.
Altshuler, Douglas L., Dudley, Robert
core  

TEMAS POLÊMICOS E A ARGUMENTAÇÃO DE ESTUDANTES DO CURSO DE CIÊNCIAS BIOLÓGICAS

open access: yesEnsaio Pesquisa em Educação em Ciências
Analisa-se a estrutura e consistência dos argumentos de alunos do curso de Ciências Biológicas quando instigados a defender determinado ponto de vista sobre dois temas "Mercado de Carbono" e "Experimetação Animal".
Daniela Malgarini Perez   +6 more
doaj   +1 more source

Learning from a long-term crop rotation experiment [PDF]

open access: yes, 2005
A crop rotation experiment was established in 1996/97 at three locations representing differ-ent soil types and climates. Three factors were tested: i) crop rotation with different propor-tions of N2-fixing crops, ii) with and without a catch crop, and ...
Askegaard, Margrethe   +2 more
core  

MODELING ANIMAL AND FORAGE RESPONSE TO FERTILIZATION OF ANNUAL RANGELANDS [PDF]

open access: yes
The response functions for forage, animal gain, and stocking rate were estimated from data obtained in a three-year fertilization experiment on California annual range.
George, Melvin R.   +4 more
core   +1 more source

The Effect of Soil Moisture Content and Animal Manure on the Growth of Mendong (Fymbristylisglobulosa (Retz.) Kunt) [PDF]

open access: yes, 2017
The objective of the research was to find out the interaction between soil moisture content and animal manure on the growth of mendong (Fymbristilis globulosa (Retz.) Kunt). The experiment was conducted in May until September 2016 in Kampong Lembur Sawah
Sumarsih, E. (Enok), Sunarya, Y. (Yaya)
core  

Pathogenicity of Multidrug-Resistant Salmonella typhimurium Isolated from Ducks

open access: yesMicroorganisms
Salmonella typhimurium (S. typhimurium) is one of the most common Salmonella serotypes in epidemiological surveys of poultry farms in recent years. It causes growth retardation, mortality, and significant economic losses. The extensive use of antibiotics
Yulin Xu   +6 more
doaj   +1 more source

Primary animal experiment to test the feasibility of a novel Y-Z magnetic hepatic portal blocking band. [PDF]

open access: yesWorld J Gastrointest Surg, 2023
Zhang MM   +9 more
europepmc   +1 more source

Pengaruh Substitusi Bungkil Kacang Kedelai Dengan Tepung Daun Singkong Dalam Ransum Terhadap Penampilan Produksi Broiler [PDF]

open access: yes, 2010
An experiment was done at Poultry Cage Trial and Laboratory of Animal Husbandry, Departement of Animal Husbandry, The State Politechnic of Lampung. The experiment began in 10th June until 10th August 2009. The experiment were conducted to know the Effect
Noviadi, R. (R)
core  

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