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26 articles for “Amazon”
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Research ArticleOpen accessEvery word in the titleImproved Compost Production from Fruit and Vegetable Market Waste: A Case Study in Bagua, Amazonas (Peru)Juan Eduardo Suarez Rivadeneira, Freddy A. Manayay, Wilfredo Ruiz Camacho, Juan Francisco Robles RuizInadequate management of organic solid waste in municipal markets represents a critical environmental challenge in tropical developing regions, where high humidity (>80%) and elevated temperatures (>25°C) accelerate decomposition, generating leachate and greenhouse gas emissions. In Peru, over 50% of municipal waste is organic, yet less than 20% is valorised through composting, highlighting a substantial technological gap. This study evaluated an … …OnLine Journal of Biological Sciences, Vol. 26, Issue 3 · 11 Aug 2026 · 1,262 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleMercury Contamination within Protected Areas in the Brazilian Northern Amazon-Amapá StateRossana Venturieri, Marcelo Oliveira-da-Costa, Cecile Gama, Christoph Bernhard JasterMercury contamination is a long-standing environmental and social problem, notably in the Amazon. The widespread use of mercury in artisanal and small-scale gold mining has driven contamination of the environment and the people, threatening biodiversity, human health and livelihoods of traditional populations. Along the border area between Brazil and French Guiana, illegal gold mining is considered a critical threat to … …American Journal of Environmental Sciences, Vol. 13, Issue 1 · 17 Jan 2017 · 9,246 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleAn Unusual Association between Chromoblastomycosis and Jorge Lobo’s Disease in the Same Patient from the Amazon RegionMaurimelia M. da Costa, Silvia H. Marques da Silva, Hugo J. R. Almeida et al.A clinical case of co-infection Cladophialophora sp. and Lacazia loboi is described and in a same patient with an 18-year history of verrucous plaques and parakeloidal nodular lesions. A 50-yearold man, a laborer, living in the Anajás city, Para, Brazil (rural Amazon region), was seen at the Evandro Chagas Institute’s ambulatory. Histopathological analysis revealed intense hyperplasia and hyperkeratosis of the … …American Journal of Agricultural and Biological Sciences, Vol. 3, Issue 3 · 30 Sep 2008 · 7,747 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleWastewater Treatment Using Organic By-Products from Agroindustry: A Case Study in the District of Valera, Amazonas Region, Northern PeruEli Morales-Rojas, Sayda Karina García Caro et al.This research evaluates the use of two types of coagulants based on organic by-products (orange and passion fruit) in wastewater (RA) treatment. The system was composed of glass tanks installed in parallel. The coagulants were elaborated and applied in aqueous solution and in powder form, and 7 physicochemical and microbiological parameters were also analyzed. Data analysis was performed using a … …OnLine Journal of Biological Sciences, Vol. 26, Issue 2 · 2 Jul 2026 · 1,172 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleWater Quality in Small-Scale Coffee Production Units, Amazonas, PeruEli Morales Rojas, Segundo Chávez Quintana, Magali García et al.The objective of this research was to determine water quality in small-scale coffee production units in the Amazon Region, Peru. The characterization of the factors associated with coffee farmers was collected through surveys. The Standard Methods for the Examination of Water and Wastewater (APHA) method was used to determine the physicochemical and microbiological parameters of the incoming water (AE) (water … …OnLine Journal of Biological Sciences, Vol. 22, Issue 4 · 11 Oct 2022 · 6,496 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleGenetic Characterization of a Bovine Breed (Tabapua) Under Artificial Selection Located in the Amazon RegionJose Elivalto Guimaraes Campelo, Marcone Helmer da Silva, Ednaldo da Silva Filho et al.Brazil currently has the biggest commercial bovine cattle population in the world. Several different breeds that come from Europe and India compose it. They are primarily used for dairy and meat production. In Brazil, several high quality genetic background cattle are kept in a condition known as pure breed, meaning no other animal of different genetic background is interbreeding with … …American Journal of Animal and Veterinary Sciences, Vol. 7, Issue 4 · 30 Jan 2013 · 7,552 accessesView PDFCite
Research NotesOpen accessEvery word in the titleOvarian Follicular Dynamics in Caqueteño Creole Cattle Breed at the Colombian Amazon PiedmontLópez-Rojas Robinson, Celis-Parra Gustavo, Tovar-Claros Gilberto et al.Caqueteño creole cattle breed is part of the eight Colombian creole cattle breeds. These breeds are characterized by having great adaptive potential to the environmental conditions in which they are found and allowing them greater productive efficiency. Caqueteño creole cattle is a breed in danger of extinction according to parameters referenced by FAO, since it is a population of cattle … …American Journal of Animal and Veterinary Sciences, Vol. 14, Issue 2 · 3 May 2019 · 8,508 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleUnfair Reviews Detection on Amazon Reviews using Sentiment Analysis with Supervised Learning TechniquesElshrif Ibrahim Elmurngi, Abdelouahed GherbiReputation and trust are significantly important and play a pivotal role in enabling multiple parties to establish relationships that achieve mutual benefit especially in an E-Commerce (EC) environment. There are several factors negatively affecting the sight of customers and sellers in terms of reputation. For instance, lack of credibility in providing feedback reviews, by which users might create phantom feedback … …Journal of Computer Science, Vol. 14, Issue 5 · 14 May 2018 · 9,882 accessesView PDFCite
Research ArticleOpen accessIn the keywordsGenetic Diversity in Cichla monoculus (Spix and Agassiz, 1931) Populations: Implications for Management and ConservationCarlos Henrique Dos Anjos Dos Santos, Carolina Fernandes Silva De Sousa, Maria de Nazare Paula-Silva et al.Problem statement: The object of this study was to examine the genetic structure and gene flow in Cichla monoculus populations in seven varzea lakes of the Solimoes River using Randomly Amplified Polymorphic DNA (RAPD) markers, to monitor the region where petroleum is transported in the Amazon basin. Approach: The loss of genetic diversity is one of the main factors leading … …American Journal of Environmental Sciences, Vol. 8, Issue 1 · 30 Jan 2012 · 8,517 accessesView PDFCite
Research ArticleOpen accessIn the keywordsPrevalence and Risk Factors of Bovine Fascioliasis in Northeastern PeruClavel Diaz-Quevedo, Hugo Frias et al.Bovine fascioliasis in Peru is highly prevalent in almost all regions; however, there are few studies about its prevalence in the region of Amazonas. This research aimed to determine the prevalence and risk factors associated with fascioliasis from four livestock basins in the Amazonas region. A total of 941 bovine feces samples were analyzed and a prevalence of 52% was … …American Journal of Animal and Veterinary Sciences, Vol. 18, Issue 3 · 25 Jul 2023 · 5,685 accessesView PDFCite