Volume 28 No. 1 January – June 2006

Rodney H. Perez and Julie D. Tan a ABSTRACT Probiotics foods and drinks are becoming more popular nowadays. Probiotic foods are foods that contain health-promoting microorganisms. The beneficial effects of probiotics may be mediated by a direct antagonistic effect against specific groups of organisms, resulting in a decrease in their metabolism or by stimulation of …

Production of acidophilus milk enriched with purees from colored sweetpotato (Ipomoea batatas L.) varieties Read More »

F. C. F. Galvez1, L. S. Palomar2, M. L. Dl. Francisco1, A. O. Lustre3 and A. V. A. Resurrection4 ABSTRACT One-on-one interviews were conducted nationwide in different regions in the Philippines. A total of 387 households participated in the survey. Most households bought peanut butter at least once a month. Results indicated that sweetness, brand, …

Filipino consumer preferences for peanut butter Read More »

R. C. Ray ABSTRACT The study was conducted to determine the production in vitro and in vivo of cellulases by Botrydiplodia theobromae and Rhizopus oryzae. Isolates of these organisms were obtained from the postharvest decay of sweetpotato tubers. Results revealed that B. theobromae and R. oryzae which were isolated from postharvest spoilage of sweetpotato tubers …

Biochemistry of postharvest spoilage of sweetpotato (Ipomoea batatas L.) 2. Comparison of cellulolytic enzyme production in cultures and fungi-infected sweetpotato tubers Read More »

Rowena P. Varela1, Lina T. Villacarlos2 ABSTRACT The structure of insect pests and natural enemies associated with white stem borer (Scirpophaga innota Walker) in the irrigated and rainfed lowland ricefields in Agusan del Norte was studied for two cropping seasons. Sweep net method was used to sample in the populations of the various arthropods. More …

Community structure of arthropods in Agusan del Norte lowland ricefields Read More »

Marilyn C. Sebial1 and L. S. Sonon1,2 ABSTRACT This study aimed to characterize the chemical and physical properties of soil and measure the nitrate concentrations at varying soil depths in the manure disposal sites of the Leyte State University piggery and beef cattle projects. Soil chemical analysis revealed that organic matter in both piggery and …

Nitrate concentration in animal manure dumping sites Read More »

Carsten Marohn1, Reinhold Jahn2 and Joachim Sauerborn1 ABSTRACT On seven sites in Western Leyte, Philippines, different land uses, namely reforestation with indigenous tree species (‘rainforestation’), reforestation with exotic tree specie Gmelina arborea, and traditional fallow/grassland use were compared with respect to soil biological activity. Analysed parameters were Basal Respiration (BR), microbial carbon (Substrate-Induced Respiration method, …

Soil biological activity under different land-uses in Leyte Philippines Read More »