Results 21 to 30 of about 723,414 (150)

Environmental Cycles, Melatonin, and Circadian Control of Stress Response in Fish

Frontiers in Endocrinology, 2019
Fish have evolved a biological clock to cope with environmental cycles, so they display circadian rhythms in most physiological functions including stress response.
Francisco Javier Sánchez-Vázquez, Jose Fernando López-Olmeda, Luisa Maria Vera, Herve Migaud, Marcos Antonio López-Patiño, Jesús M. Míguez   +5 more
doaj   +1 more source

Matching Light Source Spectrum to Photosynthetic Spectrum of Algae

Turkish Journal of Agriculture: Food Science and Technology
Microalgae have been utilized to produce various products such as pharmaceuticals, food additives, biofuels, and in processes like wastewater treatment and carbon dioxide fixation. However, scaling up production systems to provide necessary capacities of
Anil Kommareddy, Seyit Uguz, Gary Anderson   +2 more
doaj   +1 more source

In-door germination and seedling growth of green and red lettuce under LED-light spectrum and subsequent effect on baby leaf lettuce

Italian Journal of Agronomy, 2022
The spectrum and intensity of light play a significant role in the primary and secondary metabolism of plants. Low intensity can make the photosynthetic process less efficient, while inadequate spectrum can impair plant growth and quality.
Cristian Hernández-Adasme, Herman Silva, Víctor Escalona   +2 more
doaj   +1 more source

Theoretical Analysis of Suspended Road Dust in Relation to Concrete Pavement Texture Characteristics

Atmosphere
Particulate matter (PM) originating from road dust is an increasing concern in urban air quality, particularly as non-exhaust emissions from tire–pavement interactions gain prominence.
Hojun Yoo, Gyumin Yeon, Intai Kim
doaj   +1 more source

Impact of optical wavelength on the reliability of photoplethysmography-based heart rate measurements outside of controlled laboratory environments

Current Issues in Sport Science
Introduction The effectiveness of heart rate (HR) measurements via photoplethysmography (PPG) depends on the wavelength of light used. Typical PPG sensors use green, red, or infrared light, each penetrating the skin to different depths (Ray et al ...
Manuel Meier, Christian Holz
doaj   +1 more source

The influence of the material of ultrasonic vibration concentrator on the amount of mechanical vibrations’ amplitude

Известия высших учебных заведений. Поволжский регион:Технические науки, 2023
Background. The purpose of this article is to find the optimal material for the concentrator of ultrasonic vibrations for subsequent use in the processes of electric arc surfacing. Materials and methods.
A.A. Kazinskiy, D.V. Babakaev
doaj   +1 more source

Optical Characterization of a New Facility for Materials Testing under Concentrated Wavelength-Filtered Solar Radiation Fluxes

Solar, 2023
The materials used to manufacture solar receivers for tower power plants must withstand high fluxes of concentrated solar radiation (from 0.1 to even 1.5 MWm−2) and operate at high operating temperatures (>800 °C).
Noelia Estremera-Pedriza, Jesús Fernández-Reche, Jose A. Carballo   +2 more
doaj   +1 more source

Research on infrared emission spectra of pulverized coal ash deposits [PDF]

FME Transactions, 2013
This paper deals with thermal radiation properties of ash deposits on a pulverized coal boiler of an electric power plant. Normal emittance spectra in the 2.5-25 μm interval, and total normal emittance, were measured on 2 kinds of ash layers of a mm ...
Saljnikov Aleksandar, Gojak Milan, Trifunović Miroslav, Andrejević Srđan, Dobrnjac Mirko   +4 more
doaj  

Physiological assessment of water deficit in soybean using midday leaf water potential and spectral features

Journal of Plant Interactions, 2019
Drought is one of the major abiotic stresses that limit soybean production worldwide. This study was conducted to determine whether soybean cultivars with divergent growth habits respond differently to drought stress at the vegetative growth stage ...
Chathurika Wijewardana, Firas A. Alsajri, J. Trenton Irby, L. Jason Krutz, Bobby Golden, W. Brien Henry, Wei Gao, K. Raja Reddy   +7 more
doaj   +1 more source

Influence of Irradiance and Wavelength on the Antioxidant Activity and Carotenoids Accumulation in Muriellopsis sp. Isolated from the Antofagasta Coastal Desert

Molecules, 2022
Microalgae are a valuable natural resource for a variety of biocompounds such as carotenoids. The use of different light spectra and irradiance has been considered as a promising option to improve the production of these compounds.
Daniela Diaz-MacAdoo, Maria Teresa Mata, Carlos Riquelme   +2 more
doaj   +1 more source