Microbial inactivation using only Ultrasound (US) vibrations presents considerable advantages by applying green techniques with non-generation of greenhouse gases, eliminating chemicals, and operating conditions close to environmental conditions. However, industrial effluent treatment systems have been investigated as a microbial step, isolated US associated thermal (T) manometric (P) technique...

The novel coronavirus disease 2019 (COVID-19) pandemic has brought to light the role of environmental hygiene in controlling transmission. Healthcare facilities are hot spots for infectious pathogens where physical distancing and personal protective equipment (PPE) not always sufficient prevent need consider adjunct strategies transmission pathogens. In combination with current infection contro...

The aim of this study was to determine the feasibility of using high pressure CO2 for sterilization of Ginseng powder, as an alternative method to conventional techniques such as gamma-irradiation and ethylene oxide. The Ginseng sample used in this study was originally contaminated with fungi and 5 x 10(7) bacteria/g that was not suitable for oral use. This is the first time that high pressure ...

Predictive microbiology provides a powerful tool to aid the exposure assessment phase of 'quantitative microbial risk assessment'. Using predictive models changes in microbial populations on foods between the point of production/harvest and the point of eating can be estimated from changes in product parameters (temperature, storage atmosphere, pH, salt/water activity, etc.). Thus, it is possib...

the goal of this study was to determine the effects of the l-type calcium channel blockers verapamil and diltiazem on the currents of voltage-gated potassium channel (fkv1.4δn), an n-terminal-deleted mutant of the ferret kv1.4 potassium channel. measurements were made using a two electrode voltage clamp technique with channels expressed stably in xenopus oocytes. the fkv1.4δn currents displayed...

Vitamin B₁₂ is produced only by prokaryotes and utilized by animals as an essential micronutrient. Genetic complementation analysis of cell lines from patients indicated that at least eight gene products are involved in intracellular B₁₂ metabolism and utilization. We have investigated bacterial adenosylcobalamin-dependent enzymes and elucidated their structure-based fine mechanisms. They tend ...

After a short time interval of length deltat during microbial growth, an individual cell can be found to be divided with probability Pd(t)deltat, dead with probability Pm(t)deltat, or alive but undivided with the probability 1-[Pd(t)+Pm(t)]deltat, where t is time, Pd(t) expresses the probability of division for an individual cell per unit of time, and Pm(t) expresses the probability of mortalit...

The study of electroactive microbial biofilms often requires knowledge of the biofilm thickness. Unfortunately, this parameter is, nowadays, only accessible through expensive microscopic techniques. This work overcomes this limitation by presenting a new strategy, exploiting the use of chronoamperometry (CA) alone. A mixed-culture biofilm is exposed to an O2-saturated solution during anode resp...