Results 1 to 10 of about 38,785 (309)

The Epithelial Egg Tooth of the Chicken Shares Protein Markers with the Embryonic Subperiderm and Feathers [PDF]

Journal of Developmental Biology
The epithelial egg tooth is used by birds to open the eggshell for hatching. This ectodermal structure consists of a multilayered periderm and a hard cornified portion, the caruncle or actual egg tooth.
Attila Placido Sachslehner, Julia Steinbinder, Claudia Hess, Veronika Mlitz, Leopold Eckhart   +4 more
doaj   +2 more sources

Isolation of Bacillus sp. A5.3 Strain with Keratinolytic Activity

Biology, 2022
Environmental safety and economic factors necessitate a search for new ways of processing poultry farm feathers, which are 90% β-keratin and can be used as a cheap source of amino acids and peptones.
Saniya Aktayeva, Kairat Baltin, Assel Kiribayeva, Zhiger Akishev, Dmitriy Silayev, Yerlan Ramankulov, Bekbolat Khassenov   +6 more
doaj   +1 more source

Investigating the potential of the Nd:YAG and Er:YAG lasers for the cleaning of feathers: a pilot study

Heritage Science, 2022
A dual-wavelength Q-switched Nd:YAG laser emitting at 1064 nm and 532 nm and an Er:YAG laser were tested on a range of feathers containing melanin, carotenoids and psittacofulvins.
Moira Bertasa, Capucine Korenberg
doaj   +1 more source

Characterization of the Keratinolytic Activity of Three Streptomyces Strains and Impact of Their Co-Cultivation on This Activity

Microorganisms, 2023
In this study, we describe the characterization of three efficient chicken feather-degrading Streptomyces bacteria isolated from honeybee samples and assess the impact of their co-cultivation on this activity and antistaphylococcal activity. Streptomyces
Diego Martín-González, Sergio Bordel, Fernando Santos-Beneit   +2 more
doaj   +1 more source

Age features and reference intervals for the concentrations of some essential and toxic elements in laying hens [PDF]

Veterinary World, 2022
Background and Aim: Micronutrient imbalances pose a severe threat to the health and productivity of livestock and poultry. In this regard, a further stage in feeding science development will control and optimize the intake of mineral substances ...
Svyatoslav Lebedev, Oleg Zavyalov, Aleksey Frolov   +2 more
doaj   +1 more source

Methods and Applications in Trapped Charge Dating

Methods and Protocols, 2020
Trapped charge dating is a commonly used chronological tool in Earth Sciences and Archaeology. The two principle methods are luminescence dating and electron spin resonance.
James K. Feathers
doaj   +1 more source

Evaluation of Viral-Induced Stress by Quantitating Corticosterone in Feathers of Virus-Infected Specific Pathogen-Free Chicks

Journal of Applied Poultry Research, 2020
SUMMARY: Physiological stress is known to promote economic losses by causing immunosuppression. Various factors induce stress, including non-optimal management and infection with various pathogens. The concentration of the stress hormone, corticosterone,
I. Davidson, A. Altory-Natour, R. Haddas, S. Nagar, R. Meir, N. Avital-Cohen, I. Rozenboim   +6 more
doaj   +1 more source

Reduced reflectance and altered color: The potential cost of external particulate matter accumulation on urban Rock Pigeon (Columba livia) feathers

Frontiers in Ecology and Evolution, 2023
Feather quality in birds is considered an honest signal of individual health as feather appearance and function depend on an individual’s ability to maintain them.
Jennifer L. Ellis, Alexandra G. Ponette-González, Alexandra G. Ponette-González, Matthew Fry, Matthew Fry, Jeff A. Johnson, Jeff A. Johnson   +6 more
doaj   +1 more source

Taphonomic analysis of the exceptional preservation of early bird feathers during the early Cretaceous period in Northeast China

Frontiers in Earth Science, 2023
Fossil soft tissues contain important and irreplaceable information on life evolution, and on the comprehensive understanding of the nature of Mesozoic ecosystems.
Yan Zhao, Qian Tian, Guang-Ying Ren, Ying Guo, Xiao-Ting Zheng, Xiao-Ting Zheng   +5 more
doaj   +1 more source

Metal Levels in Blood of Three Species of Shorebirds during Stopover on Delaware Bay Reflect Levels in Their Food, Horseshoe Crab Eggs

Toxics, 2017
Understanding the relationship between metal level in predators and their prey is an important issue, and is usually difficult to determine because animals eat a variety of organisms.
Joanna Burger, Nellie Tsipoura, Michael Gochfeld   +2 more
doaj   +1 more source