Geraldo Humberto Silva

Dr. Geraldo Humberto Silva

orcid

Research Focus & Metrics

Academic Career Length

22Years (2005-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 September 2006 in Phytochemistry
Verified
Journal Article
Closed access
GSGeraldo Humberto Silva
Geraldo Humberto Silva
HTHelder Lopes Teles
Helder Lopes Teles
LZLisinéia Maria Zanardi
Lisinéia Maria Zanardi
MYMaria Cláudia Young
Maria Cláudia Young
MEMarcos Nogueira Eberlin
Marcos Nogueira Eberlin
AAAngela Regina Araujo
Angela Regina Araujo

21 November 2014 in Molecules
Verified
Journal Article
Open access
PDF file
VCVanessa Mara Chapla
Vanessa Mara Chapla
MZMaria Luiza Zeraik
Maria Luiza Zeraik
ILIoanis Hcristos Leptokarydis
Ioanis Hcristos Leptokarydis
GSGeraldo Humberto Silva
Geraldo Humberto Silva
VBVanderlan Bolzani
Vanderlan Bolzani
AAAngela Regina Araujo
Angela Regina Araujo
In this study, eight endophytic fungi were isolated from the leaves, stems and roots of Michelia champaca. The isolates were screened and evaluated for their antifungal, anticancer and acetylcholinesterase (AChE) inhibitory activities. All of the extracts exhibited potent activity against two evaluated phytopathogenic fungi. Chemical investigation of EtOAc extracts of the endophytic fungus Colletotrichum gloeosporioides resulted in the isolation of one new compound, 2-phenylethyl 1H-indol-3-yl-acetate (1), and seven known compounds: uracil (2), cyclo-(S*-Pro-S*-Tyr) (3), cyclo-(S*-Pro-S*-Val) (4), 2(2-aminophenyl)acetic acid (5), 2(4-hydroxyphenyl)acetic acid (6), 4-hydroxy- benzamide (7) and 2(2-hydroxyphenyl)acetic acid (8). All of the compound structures were elucidated using 1D and 2D NMR and MS analyses. The antifungal and AChE inhibitory activities of compounds 1–8 were evaluated in vitro. Compound 1 exhibited promising activity against Cladosporium cladosporioides and C. sphaerospermum that was comparable to that of the positive control nystatin.

20 January 2010 in Chemistry & Biodiversity
Verified
Journal Article
Closed access
PDF file
ASAndré Gonzaga Dos Santos
André Gonzaga Dos Santos
PFPaulo Michel Pinheiro Ferreira
Paulo Michel Pinheiro Ferreira
GJGerardo Magela Vieira Junior
Gerardo Magela Vieira Junior
CPCarla Cristina Perez
Carla Cristina Perez
ATAristeu Gomes Tininis
Aristeu Gomes Tininis
ACAlberto José Cavalheiro
Alberto José Cavalheiro

1 June 2011 in Phytochemistry Letters
Verified
Journal Article
Closed access
COCamila M. Oliveira
Camila M. Oliveira
LRLuis O. Regasini
Luis O. Regasini
GSGeraldo Humberto Silva
Geraldo Humberto Silva
LPLudwig H. Pfenning
Ludwig H. Pfenning
MYMaria Cláudia Young
Maria Cláudia Young
AAAngela Regina Araujo
Angela Regina Araujo

1 September 2010 in Phytochemistry Letters
Verified
Journal Article
Closed access
GSGeraldo Humberto Silva
Geraldo Humberto Silva
COCamila M. de Oliveira
Camila M. de Oliveira
HTHelder L. Teles
Helder L. Teles
PPPatrícia M. Pauletti
Patrícia M. Pauletti
ICIan Castro-Gamboa
Ian Castro-Gamboa
AAAngela Regina Araujo
Angela Regina Araujo

1 December 2006 in Phytochemistry
Verified
Journal Article
Closed access
HTHelder Lopes Teles
Helder Lopes Teles
RSRenata Sordi
Renata Sordi
GSGeraldo Humberto Silva
Geraldo Humberto Silva
ICIan Castro-Gamboa
Ian Castro-Gamboa
VBVanderlan Bolzani
Vanderlan Bolzani
AAAngela Regina Araujo
Angela Regina Araujo