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Articles 1 - 7 of 7
Full-Text Articles in Biology
Heavy Metal Dissolution Mechanisms From Electrical Industrial Sludge, Viraj Gunarathne, Anushka Upamali Rajapaksha, Meththika Vithanage, Nadeesh Adassooriya, Asitha Cooray, Sudantha Liyanage, Bandunee Athapattu, Nishanta Rajakaruna, Avanthi Deshani Igalavithana, Deyi Hou, Daniel S. Alessi, Yong Sik Ok
Heavy Metal Dissolution Mechanisms From Electrical Industrial Sludge, Viraj Gunarathne, Anushka Upamali Rajapaksha, Meththika Vithanage, Nadeesh Adassooriya, Asitha Cooray, Sudantha Liyanage, Bandunee Athapattu, Nishanta Rajakaruna, Avanthi Deshani Igalavithana, Deyi Hou, Daniel S. Alessi, Yong Sik Ok
Biological Sciences
In this paper, we investigate the release of heavy metals from sludge produced from an electrical industry using both organic and inorganic acids. Single and sequential extractions were conducted to assess heavy metals in different phases of the sludge. Metal release from sludge was investigated in the presence of three inorganic acids (nitric, sulfuric, and phosphoric) and three organic acids (acetic, malic, and citric) at concentrations ranging from 0.1 to 2.0 mol L−1. Sequential extraction indicated the presence of Cu primarily in the carbonate fraction, Pb in the residual fraction, and Ni in the FeMn oxide fraction. The cumulative release …
Heavy Metal-Induced Oxidative Stress On Seed Germination And Seedling Development: A Critical Review, Mihiri Seneviratne, Nishanta Rajakaruna, Muhammad Rizwan, H. M. S. P. Madawala, Yong Sik Ok, Meththika Vithanage
Heavy Metal-Induced Oxidative Stress On Seed Germination And Seedling Development: A Critical Review, Mihiri Seneviratne, Nishanta Rajakaruna, Muhammad Rizwan, H. M. S. P. Madawala, Yong Sik Ok, Meththika Vithanage
Biological Sciences
Heavy metal contamination in soils can influence plants and animals, often leading to toxicosis. Heavy metals can impact various biochemical processes in plants, including enzyme and antioxidant production, protein mobilization and photosynthesis. Hydrolyzing enzymes play a major role in seed germination. Enzymes such as acid phosphatases, proteases and α-amylases are known to facilitate both seed germination and seedling growth via mobilizing nutrients in the endosperm. In the presence of heavy metals, starch is immobilized and nutrient sources become limited. Moreover, a reduction in proteolytic enzyme activity and an increase in protein and amino acid content can be observed under heavy …
The Effects Of Edaphic And Climatic Factors On Secondary Lichen Chemistry: A Case Study Using Saxicolous Lichens, Alexander Paukov, Anzhelika Teptina, Maria Morozova, Ekaterina Kruglova, Sergio E. Favero-Longo, Cora Bishop, Nishanti Rajakaruna
The Effects Of Edaphic And Climatic Factors On Secondary Lichen Chemistry: A Case Study Using Saxicolous Lichens, Alexander Paukov, Anzhelika Teptina, Maria Morozova, Ekaterina Kruglova, Sergio E. Favero-Longo, Cora Bishop, Nishanti Rajakaruna
Biological Sciences
Diversity of secondary lichen metabolites and their relationship to substrate and environmental parameters were studied in saxicolous lichens in the Middle and South Urals of Russia. Atranorin, usnic acid, gyrophoric acid, zeorin, norstictic acid, antraquinones and stictic acid were found in 73, 42, 41, 37, 36, 35 and 32 species, respectively, of 543 taxa collected. One hundred and ninety six species (i.e., 36% of total species documented) contained no secondary metabolites. Spectra of secondary metabolites of crustose lichens varied on different rock types, while in fruticose and foliose groups only those species without lichen acids were dependent on the substrate …
Tropic Transfer And Bioaccumulation Of Lead Along Soil-Plant-Aphid-Ladybird Food Chain, Mohod Irfan Naikoo, Mudasir Ifran Dar, Fareed Ahmad Khan, Fariha Raghib, N. Rajakaruna
Tropic Transfer And Bioaccumulation Of Lead Along Soil-Plant-Aphid-Ladybird Food Chain, Mohod Irfan Naikoo, Mudasir Ifran Dar, Fareed Ahmad Khan, Fariha Raghib, N. Rajakaruna
Biological Sciences
Lead (Pb) contamination of agroecosystems is a serious issue as Pb is a persistent pollutant that is retained in soil for long, causing toxicities to organisms. This study examines biotransfer of Pb from soils treated with different concentrations of Pb through a broad bean (Vicia faba L.)–aphid (Aphis fabae Scop.)–ladybird (Coccinella transversalis Fabricius) food chain and its consequent inference for natural biological control, the ladybird. The soil was amended with Pb at the rates of 0, 25, 50, 75 and 100 mg kg−1(w/w). The amount of Pb in plant, aphid and ladybird increased in a dose-dependent manner …
Influence Of Soil Water Content And Soil Amendments On Trace Metal Release And Seedling Growth In Serpentine Soil, Viraj Gunarathne, Nishanta Rajakaruna, Udaya Gunarathne, Jayanta Kumar Biswas, Zach A. Raposo, Meththika Vithanage
Influence Of Soil Water Content And Soil Amendments On Trace Metal Release And Seedling Growth In Serpentine Soil, Viraj Gunarathne, Nishanta Rajakaruna, Udaya Gunarathne, Jayanta Kumar Biswas, Zach A. Raposo, Meththika Vithanage
Biological Sciences
This study was conducted to evaluate the synergistic effects of organic amendments and soil water status on trace metal release from serpentine soil.
Availability Of Microtrash Materials And Selectivity By California Condors, Marie G. Solis
Availability Of Microtrash Materials And Selectivity By California Condors, Marie G. Solis
Biological Sciences
California condors consume non-food items, including anthropogenic waste, and provision it to their young. Consuming “microtrash” can cause mortality, especially in nestlings. There are several hypotheses explaining why condors might consume microtrash. These hypotheses assume condors exhibit a preference for the type of material. Therefore, we test the assumption that when California condors take microtrash, they display material selectivity. We did this by sampling microtrash from roadside pullouts in the Los Padres National Forest. Those samples were compared to condor necropsy and nest microtrash data, categorized by material type: glass, plastic, metal, and other. We find that in our analysis …
Long-Term Phytoremediating Abilities Of Dalbergia Sissoo Roxb. (Fabaceae), Saqib Ul Kalam, Fauzia Naushin, Fareed Ahmad Khan, Nishanta Rajakaruna
Long-Term Phytoremediating Abilities Of Dalbergia Sissoo Roxb. (Fabaceae), Saqib Ul Kalam, Fauzia Naushin, Fareed Ahmad Khan, Nishanta Rajakaruna
Biological Sciences
The boom of tanneries in north India has converted the river Ganga into a waste dumping stream. The tanneries discharge their heavy metal-rich effluents into the river. Tissues of two-year-old tree saplings of Dalbergia sissoo, soil sediments and river water samples were collected from three sites along the river Ganga at Jajmau, Kanpur. Site-1 was located 1 km upstream from the point of discharge of the effluents of the tanneries, Site-2 was close to the source point, and Site-3 was about 1 km downstream from the source point. Accumulation of Cu, Cr and Ni in leaves, bark, wood growth rings, …