Our goal was to explore the interactions between the acoustic phenomena taking place in the ultrasound field, the concentration of the biological particles of the ultrasound field, and the cell biology effects of these interactions. Using output power of 9 W cm-2 and frequency of 1.117 MHz, the concentration was determined, expressed in g l-1, of lyophilized Saccharomyces cerevisiae baker's yeast needed for stopping cavitation in the sound field. Then by using multiples of the aforementioned concentration, we monitored the acoustic phenomena occurred in the sound field and, simultaneously, we examined the survival dynamics of the cells. Examined acoustic phenomena were the following: acoustic streaming, standing wave, and cavitation. Physical parameters (suspension density, dissolved oxygen, temperature) of the sound field had essential effect on the acoustic phenomena formed in the ultrasound field and on the threshold levels of their formation. The phenomena affected the composition of the material in the sound field, so an acoustical phenomenon - cell biological effect chain reaction took place during the radiation.
Authors:M. Gonzalez-Castro, L. Ordoñez-Acevedo, Y. Herrera-Vazquez, J. Ramirez-Telles, and A. Leon-Rodriguez
., Hofmeister, M.V. & Vinggaard, A.M. (2007): Endocrine-disrupting potential of bisphenol A, bisphenol A dimethacrylate, 4- n -nonylphenol, and 4- n -octylphenol in vitro : New data and a brief review. Environm. Health Perspect. , 115 , 69
Authors:Caturwati Ni Ketut, Yusuf Yusvardi, and Komara Fajar Muhamad
The availability of freshwater is increasingly becoming an international concern because of the increase in population and the diminishing forest area as a source of water, leading to a freshwater crisis. The coastal and swamp areas abound in water, but humans cannot consume it due to the quality. One effort that can be done in overcoming this problem is by treating existing raw water with solar distillation methods. However, the main obstacle faced in this method is the intensity of sunlight that is not stable throughout the day so that the productivity of distilled water is disrupted. Using the appropriate phase change material (PCM) is expected to make the distillation process smoother and increase the production of pure water. In this study, myristic acid was used as PCM in double slope solar distillation system. Through observation, it was obtained that the average water temperature in the basin equaled to 42.5 °C while the melting point of the myristic acid was 58 °C. This shows that the use of myristic acid as an energy storage through phase change process does not occur. Therefore, the use of myristic acid as PCM for increasing the productivity of solar distillation in these experiments is not effective because the melting point of PCM is higher than water temperature in the basin. Therefore, material with a phase change temperature below 42.5 °C is more appropriate to use in these conditions.
. Manually adjustable air inlet angle can be applied as a disruptive effect to the system. Figure 1 shows the experimental apparatus with PC. Fig. 1. Air flow and temperature control test setup 2.1 Control cycle of temperature In this cycle, the air flow is
Authors:David Torma, Gyula Gyori, and Kornil Sarvajcz
. Kishikawa , A. W. Higgins , , " Disruption of neurexin 1 associated with autism spectrum disorder ," Am. J. Hum. Genet. , vol. 82 , pp. 199 - 207 , 2018 . 10.1016/j.ajhg.2007.09.011  J. Szentagothai , M. Rithelyi , Funkcionalis Anatsmia II
Authors:Imre Mojzes, Sándor Kökényesi, István A. Szabó, Istvan Ivan, and Béla Pécz
We present a simple method of nanocrystal growth during the heating of Au-covered GaAs single crystals in a closed quartz ampoule, previously evacuated to 10-1 Pa. The process is the final stage of surface transformations in such crystals which include the disruption of initially continuous, 50 nm thick Au layer and formation of Au-particle fractals in the relatively low 300-500 °C temperature range and a next step, when a variety of crystalline nanowires and even nanotubes grows on the crystal surface during the further short-period heating up to 550-650 °C. These nanostructures were identified by SEM and TEM measurements as b-Ga2O3 and a non-stoichiometric arsenic oxide. It is supposed that the growth of few nanometer thick arsenic oxide tubes follows the vapour-solid mechanism, whereas the catalytic Au-metal growth of thicker b-Ga2O3 nanowires was dominated by the vapour-liquid-solid mechanism.
Authors:D. Filipović, J. Kasapović, S. Pejić, A. Nićiforović, S. B. Pajović, and M. B. Radojčić
Specific composition, protein profiles and total SOD activity were analysed in full milk samples obtained from five farms of the Milk Company IMPAZ. The effects of several laboratory treatments on milk proteins SDS-PAGE profiles and the respective SOD activity were also followed. The total SOD activity was detected in all full milk samples, and its values varied between 2 and 3 U mg-1 protein. The enzyme could be partially purified, up to »5 U mg-1 protein, by ethanol extraction. The recovered SOD activity in ethanol extract was proportional to the initial full milk SOD activity. The disruption of casein micelles by Ca2+ removal was followed by a significant decrease in SOD activity to 1.24-0.18 U mg-1 protein. The loss of enzyme activity was ascribed to the changes in milk milieu induced by dissociation of casein micelles.
The application of ultrasound during extraction of oil from apricot kernels using hexane was evaluated and compared with conventional methods (mechanical extraction and Soxhlet extraction). Results show that ultrasound assisted extraction (UAE) yields more oil with less solvent consumption. The oil yield from UAE, SE, and ME were 44.72%, 44.33%, and 35.06%, respectively. It is noteworthy that it took 44 min to extract oil by UAE method, while alike yield was obtained from SE in 6 hours. Oil extracted by UAE exhibited significantly higher peroxide and ester values. The functional groups of apricot kernel oil were analysed using Fourier transform infrared spectroscopy. Untreated and treated kernel powders were studied by scanning electron microscopy, and the development of microstructures and disruption of cell walls were evaluated. Our study suggests that ultrasound assisted extraction may be an effective method to extract edible oils by achieving higher efficiency in shorter extraction time.