7 research outputs found
Influence of buffer systems on Trichoderma reesei Rut C-30 morphology and cellulase production
The cellulase enzyme production is a key issue in the enzymatic
hydrolysis of lignocellulosic materials. Since fungal morphology
influences the productivity of fungal fermentations, it is of major
importance to well know the fungal behavior during culture for
cellulase production. In this work, the influence of medium
supplementation, with different buffer systems at two different
concentrations and pH conditions, on the morphology of T. reesei Rut
C-30 and cellulase production, was investigated. A medium without
buffer was used as control. The results suggest that fungal morphology
is significantly dependent on the addition of different buffer systems
to the nutrient broth. The mycelial morphology shows a clear transition
from clumped to pelleted forms in cultures with variation of buffer
systems and concentration. The higher filter paper activity was
obtained using 100 mM succinate buffer, at pH 4.8, in the medium
supplementation, corresponding to a dispersed mycelial morphology
Análise morfológica das formas imaturas de Sarconesia chlorogaster (Wiedemann) (Diptera, Calliphoridae, Toxotarsinae)
Associações entre larvas de Cochliomyia macellaria (Fabricius) e Chrysomya albiceps (Wiedemann) (Diptera, Calliphoridae) em condições experimentais
Associação entre larvas de Chrysomya megacephala (Fabricius) e Chrysomya albiceps (Wiedemann), Chrysomya megacephala (Fabricius) e Cochliomyia macellaria (Fabricius) (Calliphoridae, Diptera) sob condições de laboratório Association between Chrysomya megacephala (Fabricius) and Chrysomya albiceps (Wiedemann), Chrysomya megacephala (Fabricius) and Cochliomyia macellaria (Fabricius) larvae (Calliphoridae, Diptera), under laboratory conditions
<abstract language="eng">This paper intends to recognize some aspects of interspecific relationships between Chrysomya megacephala (Fabricius) and C. albiceps (Wiedemann) and between C. megacephala and Cochliomyia macellaria (Fabricius) larvae in laboratory. A diet consisting of decomposing horse flesh was used, and the relation of 1 larva/g diet was established. The development of the two species was done in pure and associated cultures. The association with Chrysomya albiceps influenced the post-embrionary development period and the weight of mature larvae of the C. megacephala, reducing their. Such weight decrease, along with the predation of larvae of C. megacephala larvae, yelded a decrease in survival in all of the stages. Larvae of this species showed an increase in its weight when associated with Cochliomyia macellaria. The native species responded to the association by reducing its body weigth and its viability. This association doesnt influence the duration of post-embrionary development