July 2022

The role of iron on the growth and development of the seedlings of Rhizophora mangle L.

Iron is an essential element, and its deficiency and excess result in negative effects on the growth and physiology of plants. Heavy metals are the highest anthropic pollutants that affect mangrove ecosystem. This study aimed to analyze the development of Rhizophora mangle seedlings in response to excess Fe under controlled conditions. Seedlings of R. mangle previously established were transferred to the culture...

Author(s): Barcelos Ully Depolo, Andreia Barcelos Passos Lima Gontijo, Adriano Alves Fernandes⊃, Antelmo Ralph Falqueto, Sávia Soares Pascoalini, Dielle Meire de Santana Lopes⊃, Edilson Romais Schmildt, Samira Leite⊃ and Mônica Maria Pereira Tognella  

August 2022

Factors of geomagnetic storms during the solar cycles 23 and 24: A comparative statistical study

The solar sources of 884 geomagnetic storms have been studied for the solar cycles 23 and 24 (1996-2019), regardless of their size ranges; using the Kp index and the NOAA G criteria (minor to extreme storms). It claims from our investigation that fast solar wind streams (HSSWs) is the main factor of small (G1) and medium (G2) storms and occur mostly on the descending phase of the solar cycle. Fast solar wind has...

Author(s): Sawadogo Yacouba, Koala Somaïla and Zerbo Jean Louis,