In this work, two fermentations at different temperatures (25 and 30oC), with cell recycling, were accomplished to produce ethanol, using a mix of commercial substrates, xylose (70%) and glucose (30%), as organic source for Scheffersomyces stipitis. Five consecutive fermentations of 80 g L (1o, 2o and 3o recycles), 96 g L (4o recycle) and 120 g L (5o recycle)reduced sugars led to a final maximu...

Larval pupation site preference (PSP) has been studied in sibling species of D. melanogaster and D. simulans at different density and temperature. It revealed significant variation between altered and controlled experiments. D. melanogaster larvae prefer to pupate less on glass and more in media when temperature and density altered than control. D. simulans larvae prefers glass lesser than cont...

Nyamuk merupakan serangga kecil dan ramping, tubuhnya terdiri tiga bagian terpisah, yaitu kepala (caput), dada (thorax), abdomen.. Setiap tahun, ratusan juta kasus penularan penyakit pada manusia melalui serangga. Hal menimbulkan tantangan kesehatan masyarakat secara global, karena penyebarannya berlangsung luas cepat atau yang dikenal dengan arthropod borne disease sering juga disebut sebagai ...

ABSTRACT Background: The radiographic image accuracy depends on the X-ray film information visibility. Good visibility is found by good contrast. Radiation exposure parameters (kVp, mAs) and film processing conditions have impact on contrast. In dentistry radiography machines, exposure time and processing procedure are set by radiographer. No optimized exposure time and process...

Pembentukan propil asetat didapatkan melalui reaksi esterifikasi antara propanol dengan asam asetat. Reaksi termasuk dalam reversible sehingga penambahan katalis atau pengguanaan ekses pada salah satu reaktan dapat menggeser ke arah produk. ChemCAD digunakan untuk membantu simulasi proses menggunakan reaktor jenis ekuilibrium. Fitur sensitivity study mengetahui perbandingan mol umpan yang terba...

in this paper, the effect of transmembarne pressure (tmp) at levels of 1, 1.75 & 2.5 bar, process temperature (t) at levels of 30 & 60oc and operation time (t) at levels of 15, 30, 45 & 60 minute on the permeate flux, sugar rejection, non-sugar rejection and fouling as membrane performance indexes investigated. membrane system used in this research was ceramic tubular module and it had effectiv...

abstract background: the radiographic image accuracy depends on the x-ray film information visibility. good visibility is found by good contrast. radiation exposure parameters (kvp, mas) and film processing conditions have impact on contrast. in dentistry radiography machines, exposure time and processing procedure are set by radiographer. no optimized exposure time and processing conditions ma...

Canned African giant snails (brine, egusi and sauce) of low acidity (pH 4.5) were produced using Thermal Death Time (TDT) techniques. Sixty cans each product stored for 6 months at normal temperature (30oC). The physicochemical sensory properties these products evaluated monthly. And also, 28 equally accelerated storage temperatures stress (50, 60, 70 & 80oC) weeks. Changes in pH overal...

Biosorption is a process in which solids of natural origin are employed for binding heavy metals. It is a promising alternative method to treat industrial effluents, mainly because of its low cost and high metal binding capacity. In this work, the mercury and iron biosorption process by Sargassum sp. seaweed biomass was studied. The work considered the parameters of mercury and iron sorption su...

Ochratoxin A (OTA) is a naturally occurring fungal metabolite produced by some species of Aspergillus and Penicillium. OTA being nephrotoxic, carcinogenic, hepatotoxic and immunosuppressive imparts many human and animal health hazards. In this study OTA production was observed at different temperatures (5oC, 10oC, 20oC, 30oC and 40oC) in three substrates (corn, rice and wheat) by A. ochraceus a...