Research Article

Related GMR Articles

03/17/2006
Electrophoresis; Hemoglobin variants; HPLC; Laboratory diagnosis
Lde Souza Ondei
09/09/2008
Central Amazon; Discus fish; Electrophoresis; Isoenzymes

The discus is a very popular and expensive aquarium fish belonging to the family Cichlidae, genus Symphysodon, formed by three Amazon basin endemic species: Symphysodon aequifasciatus, S. discus and S. tarzoo. The taxonomic status of these fish is very controversial, with a paucity of molecular research on their population genetic structure and species ... more

C.A. Silva; R.C.A. Lima; A.S. Teixeira
12/17/2012
Amazon; Epstein-Barr; Gastric cancer; Polymerase chain reaction; Resection margin

Gastric cancer is one of most frequent causes of death in Brazil. The city of Manaus has one of the highest incidences of this disease in Brazil. The Epstein-Barr virus (EBV) is a ubiquitous herpesvirus that is classified as a group 1 carcinogen by the International Agency for Research on Cancer. We obtained biopsies from 6 control subjects and 10 patients with gastric carcinomas living ... more

P.F. de Aquino; P.C. Carvalho; J.Sda Gama Fischer; A.Q.L. de Souza; J.S. Viana; S.R.S. Chalub; A.D.L. de Souza; M.G.C. Carvalho
02/14/2014
Amazon; Biodiversity; Cacauí; Genetic variability; ISSR

The genus Theobroma found in the Amazon region is composed of 22 species, including Theobroma speciosum, better known as cacauí. These species are constantly threatened by forest fragmentation caused by human activities and require conservation strategies and management aimed at preserving them in their natural environments. The main objective of this study was to ... more

L.D. Giustina; L.N. Luz; F.S. Vieira; F.S. Rossi; C.R.A. Soares-Lopes; T.N.S. Pereira; A.A.B. Rossi
11/08/2002
Apomixis origin; Centers of diversity; Electrophoresis; Evolution; Interspecific hybridization; Polyploidy; Unreduced gametes

About 98 species of Manihot are known. All of them are native to the New World and are concentrated in four regions in Brazil and Central America. All the Manihot species so far examined have 2n = 36 chromosomes. Interspecific hybrids between cassava and its wild relatives show relatively normal meiosis, and further generations can be obtained. Electrophoresis shows ... more

N.M.A. Nassar
07/31/2022
Chelonoidis; Electrophoresis; Hemoglobin; Testudinidae

The Brazilian Testudinidae family is widespread across South America. It includes Chelonoidis denticulatus, the largest tortoise in South America and Chelonoidis carbonarius, found mostly in the north and northwestern part of the continent. Using hemoglobin to identify species is cheaper than other methods such as DNA sequencing and can offer ... more

T.L. Silva; V.L.O. Cardoso; N.R.A. Costa; L.P.R. Venancio; L.R. Pereira; C.R. Bonini-Domingos
03/11/2024
Electrophoresis; Environmental Impacts; Experimental Classes; Low Cost Materials

Experimental classes may aid to develop scientific concepts and allow students to understand how to objectively approach their reality and develop solutions for complex problems, as environmental pollution and support for high schools and universities laboratories. In this work an electrophoresis box was made by students from and acrylic chocolate box, to verify ... more

E.B. Santana; R.S. Santos
12/01/2006
Amazon; Brachyplatystoma; Conservation; Fish homing; Phylogeography; Siluriformes

The large pimelodid, Brachyplatystoma rousseauxii, is one of the two most important catfish species for the fisheries in the Amazon. It is captured by commercial and artisanal fishing fleets in at least five Amazonian countries, at fishing grounds more than 5000 km apart. Current evidence suggests a complex life cycle that includes the longest reproductive migration known for a ... more

J.S. Batista; J.A. Alves-Gomes
09/27/2013
Amazon; Bertholletia excelsa; Ethnoclassification; Non-timber forest products

In the State of Acre, the Brazil nut tree, Bertholletia excelsa (Lecythidaceae), is classified by the local population into two types according to morphological characteristics, including color and quality of wood, shape of the trunk and crown, and fruit production. We examined the reliability of this classification by comparing morphological and molecular data of four ... more

P.S. Sujii; E.T.M.B. Fernandes; V.C.R. Azevedo; A.Y. Ciampi; K. Martins; L.Hde O. Wadt
01/29/2016
Amazon; Multiple paternity; Podocnemis sextuberculata; Reproductive parameters; Trombetas River; Turtles

Genetic studies of multiple paternity are a valuable tool to gain information on the reproductive biology of turtles. We analyzed paternity type in Podocnemis sextuberculata and related number of fathers per nest to nesting period (beginning, middle, or end of nesting season); clutch size (number of eggs); female size; and hatchling success. Females were captured and maximum ... more

F.P. Freda; V.C.D. Bernardes; C.C. Eisemberg; C. Fantin; R.C. Vogt; F.P. Freda; V.C.D. Bernardes; C.C. Eisemberg; C. Fantin; R.C. Vogt; F.P. Freda; V.C.D. Bernardes; C.C. Eisemberg; C. Fantin; R.C. Vogt

Pages