Luis Figueroa - Academia.edu (original) (raw)

Papers by Luis Figueroa

FIGURES 10–18. Type specimens of Coleoptera in the MUSM. 10, Cratomorphus frankeae Bohórquez (Lam... more FIGURES 10–18. Type specimens of Coleoptera in the MUSM. 10, Cratomorphus frankeae Bohórquez (Lampyridae); 11, Lagochile brunnea tenaensis Soula (Melolonthidae); 12, Pocadius maquipucunensis Leschen & Carlton (Nitidulidae); 13, Eurysternus inca Génier (Scarabaeidae); 14, Philothalpus lucieae Asenjo & Ribeiro-Costa (Staphylinidae); 15, Pseudopsis monica Asenjo & Ribeiro-Costa (Staphylinidae); 16, Hyperaspis esmeraldas Gordon & González-Fuentes (Coccinellidae); 17, Anthonomus onerosus Clark (Curculionidae); 18, Macrohaltica crypta Santisteban (Chrysomelidae). Holotypes (10, 14, 15, 17); Paratypes (11, 12, 13, 16, 18).

FIGURES 1–9. Type specimens of Coleoptera in the MUSM. 1, Dactylozodes (Nelsonozodes) huaylasiens... more FIGURES 1–9. Type specimens of Coleoptera in the MUSM. 1, Dactylozodes (Nelsonozodes) huaylasiensis Moore & Diéguez (Buprestidae); 2, Trechisibus (Trechisibiodes) valenciai Etonti & Mateu (Carabidae); 3, Eumolpus viriditarsis viriditarsis Špringlová (Chrysomelidae); 4, Coleomegilla occulta González-Fuentes (Coccinellidae); 5, Lixus delatus Kuschel (Curculionidae); 6, Bystus decorator Leschen & Carlton (Endomychidae); 7, Epimetopus mendeli Fikáček, Barclay & Perkins (Hydrophilidae); 8, Lybanodes stigmatus Skelley in Skelley, Leschen & McHugh (Erotylidae); 9, Euspilotus (Hesperosaprinus) excavata Arriagada in Degallier, Arriagada, Kanaar, Moura, Tishechkin, Caterino & Warner (Histeridae). Holotypes (2, 6, 8); Paratypes (1, 3, 4, 5, 7, 9).

Zootaxa, 2017

The Coleoptera type species of Museo de Historia Natural de la Universidad Nacional Mayor de San ... more The Coleoptera type species of Museo de Historia Natural de la Universidad Nacional Mayor de San Marcos housed in the Entomology Department, Lima, Peru, were examined and listed. This is an important collection in South America and the largest in Peru. All type material of Coleoptera were studied and photographed. Complete information is given for each type specimen, including the reference of the original description and labels data. A total of 275 types specimens were listed and arranged in families.

Fungal biology, Sep 1, 2017

The fungus Penicillium camemberti is widely used in the ripening of various bloomy-rind cheeses. ... more The fungus Penicillium camemberti is widely used in the ripening of various bloomy-rind cheeses. Several properties of P. camemberti are important in cheese ripening, including conidiation, growth and enzyme production, among others. However, the production of mycotoxins such as cyclopiazonic acid during the ripening process by P. camemberti has raised concerns among consumers that demand food with minimal contamination. Here we show that overexpressing an α-subunit from the subgroup I of the heterotrimeric G protein (Gαi) influences several of these processes: it negatively affects growth in a media-dependent manner, triggers conidial germination, reduces the rate of sporulation, affects thermal and osmotic stress resistance, and also extracellular protease and cyclopiazonic acid production. Our results contribute to understanding the biological determinants underlying these biological processes in the economically important fungus P. camemberti.

Notas Historicas Y Geograficas, 2000

Revista De La Facultad De Medicina, Nov 7, 2013

Se presenta un caso de lipoma cervicotorácico gigante en paciente femenino de 45 años de edad, qu... more Se presenta un caso de lipoma cervicotorácico gigante en paciente femenino de 45 años de edad, quien consultó por aumento de volumen cervical, odinodisfagia y disnea. Una radiografía de tórax y tomografía computarizada reveló una masa gigante intratorácica bilateral, ocupando la cavidad torácica izquierda con extensión al mediastino anterosuperior y al cuello, desplazando la tráquea y la faringe hacia la porción anterior y derecha. La paciente se llevó a resección quirúrgica del tumor cervico-torácico, con examen histológico que confirmó el diagnóstico de un lipoma gigante, con peso de 475 gramos y medidas de 30 x 20 cm. Este es el lipoma cervico-torácico más grande documentado en la literatura moderna y con abordaje mixto cervicotomía más toracoscopia.

Journal of natural products, Jan 3, 2015

Four new nitroasterric acid derivatives, pseudogymnoascins A-C (1-3) and 3-nitroasterric acid (4)... more Four new nitroasterric acid derivatives, pseudogymnoascins A-C (1-3) and 3-nitroasterric acid (4), along with the two known compounds questin and pyriculamide, were obtained from the cultures of a Pseudogymnoascus sp. fungus isolated from an Antarctic marine sponge belonging to the genus Hymeniacidon. The structures of the new compounds were determined by extensive NMR and MS analyses. These compounds are the first nitro derivatives of the known fungal metabolite asterric acid. Several asterric acid derivatives isolated from other fungal strains have shown antibacterial and antifungal activities. However, the new compounds described in this work were inactive against a panel of bacteria and fungi (MIC > 64 μg/mL).

Cuadernos de Economía Nro

Geophysical Research Letters, 1996

The simultaneous measurements of atmospheric HCOOH, CH 3 COOH H 2 O 2 , organic peroxides, HCHO, ... more The simultaneous measurements of atmospheric HCOOH, CH 3 COOH H 2 O 2 , organic peroxides, HCHO, CH 3 CHO and isoprene made in the Venezuelan savannah region, in the wet season (September, 1993) and during the period of high solar irradiation is reported. ...

Atmospheric Environment, 1996

Gas phase and rain concentrations of HCOOH and CHaCOOH have been measured at various sites in the... more Gas phase and rain concentrations of HCOOH and CHaCOOH have been measured at various sites in the sawtnnah climatic region, a cloud forest site and a coastal site in Venezuela. Gas phase and rain water were sampled using the aqueous scrubber technique and a wet only collector, respectively. Analyses were made b) ion chromatography. The results indicate that formic and acetic acids are important components of the Venezuelan atmosphere. They are homogeneously distributed, suggesting a widespread source. Boundary layer concentrations during the dry season (HCOOH, 1.8 ppbv; CH3COOH, 1.25 ppbv) are higher than in the wet season (HCOOH, 1.0 ppbv; CHsCOOH, 0.7 ppbv), mainly due to a longer lifetime of the acid during the dry season (~ 6 days) compared with the wet season (~ 2 days). The overall concentrations in rain are 7.0 and 4.0 #M for formic and acetic acids, respectively. The estimated annual total depositions are: HCOOH, 17 mmol m-2 yr-1 and CH3COOH, 10 mmol m-2 yr-1; around half of the acids are removed by dry deposition. It is established that a larger source (~ 1.8 times) of both acids is present during the wet season. We speculate that atmospheric oxidation of hydrocarbons should be the main source of HCOOH and CH3COOH in the Venezuelan atmosphere; soil emissions could make a significant contribution during the dry season.

Documento en progreso …

Documento en Proceso. Escrito por Luis R. Figueroa, Rocío Montes de Oca, Luis Rivera, Lucía Marsh... more Documento en Proceso. Escrito por Luis R. Figueroa, Rocío Montes de Oca, Luis Rivera, Lucía Marshall, investigadores-consultores de CLACDS y Roberto Artavia, Rector del INCAE. Este trabajo busca estimular la reflexión sobre marcos conceptuales novedosos, posibles ...