Results 11 to 20 of about 167,360 (278)

REFLEXIVITY IN PIGEONS [PDF]

open access: yesJournal of the Experimental Analysis of Behavior, 2010
A recent theory of pigeons' equivalence‐class formation (Urcuioli, 2008) predicts that reflexivity, an untrained ability to match a stimulus to itself, should be observed after training on two “mirror‐image” symbolic successive matching tasks plus identity successive matching using some of the symbolic matching stimuli. One group of pigeons was trained
Sweeney, Mary M, Urcuioli, Peter J
openaire   +4 more sources

The pigeon’s concept of pigeon [PDF]

open access: yesPsychonomic Science, 1971
Pigeons were trained to discriminate between the presence and absence of a pigeon in photographic displays projected on a response key. Irrelevant cues were reduced as much as possible, while the differences between the objects were of sufficient variety and complexity to ensure that mastery of the discrimination would require the use of a concept. The
Jean Poole, D. G. Lander
openaire   +1 more source

Dietary habits of urban pigeons (Columba livia) and implications of excreta pH – A review [PDF]

open access: yes, 2017
Pigeons are considered to be urban pests, causing untold damage to buildings and potentially impacting the health of humans who come into contact with them or their faeces.
Spennemann, Dirk HR, Watson, Maggie J
core   +3 more sources

Treatment with Docosahexaenoic Acid Improves Epidermal Keratinocyte Differentiation and Ameliorates Inflammation in Human Keratinocytes and Reconstructed Human Epidermis Models

open access: yesMolecules, 2019
Atopic dermatitis (AD) is a chronic inflammatory skin disease that can cause skin barrier function damage. Although co-incubation with docosahexaenoic acid (DHA) exerts a positive effect on deficient skin models, no studies have investigated the effects ...
Tinghan Jia   +4 more
doaj   +1 more source

Pigeon breeders’ lung: pigeon intestinal mucin, an antigen distinct from pigeon IgA [PDF]

open access: yesClinical and Experimental Immunology, 1991
SUMMARY Antigens identified by indirect immunofluorescence staining and specific for sera from patients with pigeon breeders’ lung or healthy pigeon breeders, have been isolated from pigeon intestinal mucus. Two antigenic peaks, one pigeon intestinal mucin and the other IgA, were separated by equilibrium centrifugation of water-soluble ...
A, Todd, R M, Coan, A, Allen
openaire   +2 more sources

Suitability of leguminous cover crop pollens as food source for the green lacewing Chrysoperla externa (Hagen) (Neuroptera: Chrysopidae). [PDF]

open access: yes, 2006
Diversification of crops with species that provide suitable pollen for predators may reduce pest population on crops by enhancing predator effectiveness.
Euzébio, Denise E.   +4 more
core   +2 more sources

Macro vs. Micro Methods in Non-Life Claims Reserving (an Econometric Perspective) [PDF]

open access: yes, 2016
Traditionally, actuaries have used run-off triangles to estimate reserve ("macro" models, on agregated data). But it is possible to model payments related to individual claims.
Charpentier, Arthur, Pigeon, Mathieu
core   +4 more sources

Relevance of skin-prick test and immunoglobulin E estimation in pigeon-exposure asthma patients

open access: yesEgyptian Journal of Chest Disease and Tuberculosis, 2021
Background Pigeon exposure is common in India due to its cultural and religious practice. Hypersensitivity to pigeon allergen is well known as pigeon breeder disease. Limited data also show that pigeon allergen was associated with increased asthma.
Anil K Mavi   +4 more
doaj   +1 more source

A multi strategy improved pigeon-inspired optimization algorithm [PDF]

open access: yesITM Web of Conferences, 2022
Pigeon-inspired optimization algorithm is easy to fall into local optimization and low convergence accuracy in solving nonlinear optimization problems.
Liao Heng, Huang Huadong
doaj   +1 more source

The tonsils revisited: review of the anatomical localization and histological characteristics of the tonsils of domestic and laboratory animals [PDF]

open access: yes, 2011
This paper gives an overview of the anatomical localization and histological characteristics of the tonsils that are present in ten conventional domestic animal species, including the sheep, goat, ox, pig, horse, dog, cat, rabbit, rat, and pigeon ...
Casteleyn, Christophe   +3 more
core   +2 more sources

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