Apr 02, 2020Open    AccessPreprint

The Importance of Geochemistry in the Management of Lake Environments: Analysis of Parameters Composing the Water Quality Index (Wqi)

Ana Silva, Isabel Azevedo, Manuel Cruz
The present work aims to elaborate a review of the geochemical aspects used to compose the Raw Water Quality Index (WQI), highlighting lake environments and their importance for management practices. This paper is a bibliographic review based on specialized scientific and legislative literature conducted between April 2016 and March 2019. The scientific articles were selected by searching the Scielo database and the Periódicos Capes and the database search was performed using the terminologies r...

May 13, 2015Open    AccessPreprint

Effect of Variable Sulfur Supply on Thiol Compounds and Arsenic Accumulation in Kandelia Obovata (S., L.) Yong Seedlings

Dou Yangyang, Wu Guirong
In the present study, Kandelia obovata (S., L.) Yong seedlings were exposed to As V(0, 30, 60 and 150 mg kg-1) under different levels of sulfur (0, 0.1, 0.2 and 0.4% (w: w)) supply. A highly significant negative correlation between arsenic concentration in leaves with sulfur treatment (r=-0.554, P...

Apr 29, 2015Open    AccessPreprint

Validation of Analytical Method for Chromatographic Determination of Chlorimuron Ethyl Herbicide in Sediments

Ramom Rachide Nunes, Bruno Henrique Froes Santos, Maria Olímpia Oliveira Rezende
The present work describes the validation of an analytical method for chromatographic determination of chlorimuron ethyl herbicide (compound of sulphonylurea group) in sediments, in according with Brazilian legislation, following the guidance and normative documents of INMETRO (DOQ-CGCRE-008) and ANVISA (Resolution RE no 899 - 2003). The results show that the chromatographic method demonstrated to be selective, accurate, precision and linear over the concentration range of 5.0-1000.0 ug L-1...

Mar 23, 2015Open    AccessPreprint

Forage Yield and Quality of Mungbean as Influnced by Harvesting Stage and Seed Rate

Yousif Mohamed Zainelabdeen Hamed, Mozzamil A.M. Eltalib
This study was conducted in gedarif research station farm for two seasons in 2013 and 2014. The objective was to determine optimum seed rate and time of harvesting mungbean for green forage and hay under rain fed conditions. The results showed different significant in three stage of cutting and three seed rate at different parameter as indicated by plant height, plant number, branch number, leave number and dry weight. The result showed highly significant between vegetative and boding stage. In ...


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