Permeado de soro de queijo foi usado como um substrato para a fermentação de Propionibacterium freudenreichi PS1 para produção de ácidos graxos de cadeia curta, constituintes do bioaroma de queijo suíço. O bioaroma líquido foi encapsulado por secagem por atomização sob diferentes condições de temperatura de entrada de ar e vazão de alimentação. Um estudo foi realizado sobre a estabilidade do bioaroma durante estocagem em embalagens laminadas a 30 °C por 90 dias, usando o produto que mostrou maior retenção de ácido acético e propiônico. Os resultados mostraram que a melhores condições de secagem foram uma temperatura do ar de entrada de 180 °C e taxa de alimentação de 24 g/min, resultando em partículas com superfície lisa e poucas invaginações e microfissuras. No entanto, 72% do ácido acético e 80% do ácido propiônico foram perdidos durante a estocagem, mostrando que o material de parede usado foi inadequado para garantir a estabilidade do produto.

Cheese whey permeate was used as a substrate for the fermentation of Propionibacterium freudenreichi PS1 for the production of short chain fatty acids, components of the bio-aroma of Swiss cheese. The liquid bio-aroma was encapsulated by spray drying under different conditions of air inlet temperature and feed rate. A study was carried out on the stability of the bio-aroma during storage in laminated packages at 30 °C for 96 days using the product showing the greatest retention of acetic and propionic acids. The results showed that the best drying conditions were an air entrance temperature of 180 °C and a feed rate of 24 g/min resulting in particles with a smooth surface and few invaginations and micro-fissures. However, 72% of the acetic acid and 80% of the propionic acid were lost during storage showing that the wall material used was inadequate to guarantee product stability.

Female mosquitoes (Culicidae) were collected in human bait weekly between March 1997 to February 1998, in three different areas of the oceanic region of Niterói city, Rio de Janeiro State, in southeastern coast of Brazil. The results indicated the presence of 16 species: Anopheles aquasalis, Aedes scapularis, A. taeniorhynchus, A. albopictus, A. aegypti, Haemagogus leucocelaenus, Psorophora ferox, P. conffinis, P. cingulata, Culex quinquefasciatus, C. nigripalpus, Coquillettidia venezuelensis, Uranotaenia calosomata, Limatus durhami, Weyomyia oblita and Phoniomyia sp. A statistical analysis between monthly female frequencies and temperature, air humidity and precipitation monthly indices was done, using Sperman correlation in Statistica 4.2 program. The only difference among the collected points is the higher number of species collected in Engenho do Mato, in spite of the differences between them in relation to vegetal formation and conservation. The species showed higher frequencies of females during spring and summer seasons, and permit us to conclude that temperature and precipitation demonstrated high levels of correlation to female frequencies along the one year study, but the same was not observed in relation to air humidity. Some of the identified species, such as Aedes aegypti, A. albopictus, A. scapularis, Haemagogus leucocelaenus and Culex quinquefasciatus are important as disease vectors and control suggestions are made in front of the relative abundance of them in different periods of the year.