Results 21 to 30 of about 134,752 (264)

Nutrient concentrations and trophic state of three Andean lakes from Junín, Perú

Revista Ambiente & Água, 2020
The study assessed the trophic state of three lakes used as fish farms in the region of Junín-Peru, under different hydrological conditions. Surface water samples were collected from three points at each lake in 2018 during the rainy (March-April) and ...
Fernán Chanamé-Zapata, María Custodio, Christian Poma-Chávez, Alex Huamán-De La Cruz   +3 more
doaj   +1 more source

Relationship between chlorophyll a pigment and algal geometric biovolume determination in a floodplain lake (Ciénaga Ayapel, Córdoba-Colombia)

Revista Facultad de Ingeniería Universidad de Antioquia, 2012
The estimation of biomass of planktonic algae can be done by two methods, the quantification of geometric biovolume and chlorophyll a. This work which considers as environmental scenario the Ayapel-Cordoba flood-plain lake, introduces (presents) the two
Esnedy Hernández, Nestor Jaime Aguirre, Jaime Alberto Palacio   +2 more
doaj   +1 more source

Indirect method for quantifying the content of photosynthetic pigments in genotypes of dwarf elephant grass - doi: 10.4025/actascianimsci.v35i1.15178

Acta Scientiarum: Animal Sciences, 2012
Equations that indirectly associate the rates obtained by chlorophyll meter SPAD-502 to chlorophyll and carotenoids rates of dwarf elephant grass genotype are provided. Leaves of the genotype of dwarf elephant grass were employed.
Saulo Alberto do Carmo Araújo, Hernan Maldonado Vasquez, Alena Torres Neto, Eliemar Campostrini, Bruno Borges Deminicis, Érico da Silva Lima   +5 more
doaj   +1 more source

Study some of Garden Cress (Lepidium sativum L.) Physiological Traits at Levels of Irrigation and Ascorbic Acid [PDF]

Ikufīziyuluzhī-i Giyāhān-i Zirā̒ī, 2017
Drought seriously reduces the quality and quantity of agronomic and horticultural plants. In such condition, using factors to reduce these effects on plants is indispensible. To evaluate the effect of water stress and different levels of ascorbic acid on
Zohre Akbari, Mansour Fazeli Rostampour, Leyla Zeya ebrahimi, Mohamad Reza Naroeirad   +3 more
doaj  

Caspian Sea is eutrophying: the alarming message of satellite data

Environmental Research Letters, 2020
The competition over extracting the energy resources of the Caspian Sea together with the major anthropogenic changes in the coastal zones have resulted in increased pollution and environmental degradation of the sea.
Anahita Modabberi, Roohollah Noori, Kaveh Madani, Amir Houshang Ehsani, Ali Danandeh Mehr, Farhad Hooshyaripor, Bjørn Kløve   +6 more
doaj   +1 more source

Photosynthetic responses of heat-stressed apple leaves to foliar application of salicylic and ascorbic acid

Photosynthetica
High temperatures have significant impacts on fruit tree production. Foliar spraying application of promoting agents can be a sustainable approach to managing high-temperature stress in orchards.
I. MIHALJEVIĆ, M. VILJEVAC VULETIĆ, V. TOMAŠ, Z. ZDUNIĆ, D. VUKOVIĆ   +4 more
doaj   +1 more source

CHLOROPHYLL AND VITAMIN A. [PDF]

The Lancet, 1922
n ...
openaire   +4 more sources

Development of a handheld chlorophyll content detector on wheat and maize leaves based on RGB sensor

Frontiers in Plant Science
Chlorophyll-a (CL-a) and chlorophyll-b (CL-b) are major chlorophyll found in green plants. Determining the CL-a, CL-b, and total chlorophyll (TCL) contents is important to guide crop growth.
Weidong Pan, Heng Ma, Rui Wang, Hongrui Wang, Dong Wang, Wenchuan Guo, Xiangkai Guo   +6 more
doaj   +1 more source

Chlorophyll-a concentrations in 82 large alpine lakes on the Tibetan Plateau during 2003–2017: temporal–spatial variations and influencing factors

International Journal of Digital Earth, 2021
As essential parts of the unique ecosystem of Tibetan Plateau (TP), the sizes and associated physical properties of alpine lakes have long been investigated. However, little is known about one of the most critical biogeochemical properties, i.e.
Xuehui Pi, Lian Feng, Weifeng Li, Junguo Liu, Xingxing Kuang, Kun Shi, Wei Qi, Deliang Chen, Jing Tang   +8 more
doaj   +1 more source

The Impact of Typhoon “In-Fa” (2021) on Temperature, Salinity, and Chlorophyll-a Concentration in the Upwelling Area of Northwestern East China Sea

Atmosphere, 2023
Severe typhoon “In-Fa” passed through the northwestern region of East China Sea (ECS) in July 2021, affecting oceanic variables such as seawater temperature, salinity, and chlorophyll-a (Chl-a) concentration over the upwelling area.
Yingliang Che, Biyun Guo, Venkata Subrahmanyam Mantravadi, Jushang Wang, Zhaokang Ji   +4 more
doaj   +1 more source