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The diffusion process in the production of sugar is a determining process which affects the final quality of sugar. The pH of water which is used in this process is being controlled by adding sulphur dioxide gas to the water. In this research, the reason of corrosion of the sulphur dioxide gas transporter pipe to the diffusion water producer tank has been studied. In this way, the quantometery analysis of the base metal and weld zone, and X-ray diffraction analysis of the corrosion products has been applied. In addition, the corrosion rate of the base metal has been determined by the potentiodynamic polarisation technique at the temperatures between 50 t 70 °C and also the DLEPR method has been used for the weld zone. The Results showed that the main reason of the corrosion of the pipe was the accumulation of the gas in the bottom of the pipe and the concentrated sulphur containing droplets which led to the localised corrosion of the pipe. Finally, changing the position of the branch pipes, shelving the pipe and changing the material are being suggested.

Extraction of bioactive materials from herbal plants may be interesting due to the growing trend of using herbal remedies instead of chemical ones. The aim of present study is to optimize the conditions of Berberine extraction from roots of Berberis Vulgaris by supercritical CO2. The dependency of Berberine extraction yield on extraction parameters, time and pressure, was studied by Response surface Methodology. The effective factors on the extraction yield and adequacy of proposed model was investigated according to the experimental data and statistical analysis. The correlation coefficient (R2 = 92.71 %( showed that about 93% of all alternatives can be explained by this experimental model. Pressure has the most influence on yield of extracted berberine and the interaction term of Time –Pressure is statistically significant on the berberine yield. Using supercritical CO2 method with pressure in the range of 300-400 bars and the time in the range of 40-75 minutes would lead to the maximum of berberine extraction (more than 400 µg/gr). Finally, yield of berberine extraction by SFE has been compared with traditional method (Soxhlet) and the strengths and weaknesses of this novel method have been considered.

The direct relation between high blood cholesterol and cardiovascular diseases has been proved. Food containing high amount of cholesterol such as meat and meat products, egg yolk, milk and dairy products can be elevated the cholesterol content in blood plasma. The possibility of cholesterol reduction in milk using beta cyclodextrin was investigated. In this research, various amounts of β- cyclodextrin (0, 0.5, 1 and 1.5 %) were mixed with raw (unhomogenized and unpasteurized) and homogenized milk at two temperature conditions of 8°C and 20°C. The cholesterol content of milk was measured for each treatment. The results that statistically were analyzed and showed that the cholesterol content of milk remarkably was decreased with increasing the amount of β- cyclodextrin, particularly in homogenized milk at 20°C .However, the reduction rate of cholesterol were decreased when extra β- cyclodextrin added due to its intermolecular reactions. The maximum cholesterol reduction was achieved when 1.5 % β- cyclodextrin added to homogenized milk at 20°C.

In the present research, the power of antioxidant activity in Bene Hull subspecies (Mutica) extract was discussed using subcritical water technique, at 110,155 and 200°C temperatures with 45 minutes of constant time and the ratio of for Bene hull to water. The dependent variables of this study were measured based on Melanoidic impact extent, the power of resuscitating ferrous (Mg/Ml) the extent of controlling DPPH free radicals (Mg/ Ml) and total amount of phenolic compounds (Mg of Gallic Acid/ 100 G of material). The study revealed that at 200°C the Melanoidic impact extent, the power of resuscitating ferrous (Mg/Ml) the extent of controlling DPPH free radicals (Mg/ Ml) were at the maximum; meanwhile total Phenolic content was highest at 155°C. Under this circumstance, the amount of polyphenolic contents, reduction power according to EC50 and DPPH free radical scavenging activity according to EC50 were predicted to be 2096.41 mg Gallic acid / 100 g Bene hull, 0.213 mg /ml and 0.685 mg/ ml, respectively. The results proved that subcritical water extraction method was suitable to obtain biological materials out of Bene hull. Intense extraction yield, abundant solvent, cheap and non-environmental issues are its benefits. In the present research, the power of antioxidant activity in Bene Hull subspecies (Mutica) extract was discussed using subcritical water technique, at 110,155 and 200°C temperatures with 45 minutes of constant time and the ratio of for Bene hull to water. The dependent variables of this study were measured based on Melanoidic impact extent, the power of resuscitating ferrous (Mg/Ml) the extent of controlling DPPH free radicals (Mg/ Ml) and total amount of phenolic compounds (Mg of Gallic Acid/ 100 G of material). The study revealed that at 200°C the Melanoidic impact extent, the power of resuscitating ferrous (Mg/Ml) the extent of controlling DPPH free radicals (Mg/ Ml) were at the maximum; meanwhile total Phenolic content was highest at 155°C. Under this circumstance, the amount of polyphenolic contents, reduction power according to EC50 and DPPH free radical scavenging activity according to EC50 were predicted to be 2096.41 mg Gallic acid / 100 g Bene hull, 0.213 mg /ml and 0.685 mg/ ml, respectively. The results proved that subcritical water extraction method was suitable to obtain biological materials out of Bene hull. Intense extraction yield, abundant solvent, cheap and non-environmental issues are its benefits

Titanium Oxide nanoparticles with semi conductive and photo catalytic properties exhibits bactericidal activity when irradiated under UV ray in aqueous solutions. This is a phenomenon caused from formation of oxygenated hydroxyl groups. The oxygenated hydroxyl groups could disintegrate the cell wall of some microorganisms. We investigated the lethal effects of TiO2 nanoparticles on four harmful microorganisms in food. Pathogenic strains of E. coli and St. aureus, toxicogenic strain of A. parasiticus and putrefactive strain of S. cerevisiae cultured on their selective media including 1% and 2% TiO2 concentrations activated by UV irradiation using two UV lamps 14W for 30, 60 and 120 minutes before inoculation. Viable cells in cell suspensions were counted after incubation at desired conditions for each microorganism. The results statistically analyzed and showed that the total count of pathogenic E. coli significantly reduced in both concentrations of activated TiO2 up 60 min UV irradiation whereas none of the treatments were unaffected on St. aureus. The viable count reduction were 56.8% and 70% for S. cerevisiae and A. parasiticus respectively on their culture media including 2% TiO2 concentration with 60min irradiated by UV irradiation. This study showed the lethal or growth inhibitory effects of photocatalytic TiO2 on pathogenic and toxicogenic of various microorganisms types and could be applied for further investigations.

Deep brain stimulation (DBS) for secondary (acquired, combined) dystonia does not reach the high degree of efficacy achieved in primary (genetic, isolated) dystonia. We hypothesize that this may be due to variability in the underlying injury, so that different children may require placement of electrodes in different regions of basal ganglia and thalamus. We describe a new targeting procedure in which temporary depth electrodes are placed at multiple possible targets in basal ganglia and thalamus, and probing for efficacy is performed using test stimulation and recording while children remain for one week in an inpatient Neuromodulation Monitoring Unit (NMU). Nine Children with severe secondary dystonia underwent the NMU targeting procedure. In all cases, 4 electrodes were implanted. We compared the results to 6 children who had previously had 4 electrodes implanted using standard intraoperative microelectrode targeting techniques. Results showed a significant benefit, with 80% of children with NMU targeting achieving greater than 5-point improvement on the Burke–Fahn–Marsden Dystonia Rating Scale (BFMDRS), compared with 50% of children using intraoperative targeting. NMU targeting improved BFMDRS by an average of 17.1 whereas intraoperative targeting improved by an average of 10.3. These preliminary results support the use of test stimulation and recording in a Neuromodulation Monitoring Unit (NMU) as a new technique with the potential to improve outcomes following DBS in children with secondary (acquired) dystonia. A larger sample size will be needed to confirm these results.

Conventional processes of food dewatering, such as thermal, have undesirable and destruction effects on vitamins, aromatic compounds and pigments. In addition, they are accompanied with some technological complications and energy consumption. Thus, food concentration processes are directed to non-thermal techniques or methods with reduced heat effects. Superabsorbents are highly hydrophilic polymer networks which can absorb water and aqueous solutions some hundred times of their weights and retain them. These materials are subgroups of hydrogel family that are transformed into gels after absorbing water. In the present research, the possibilities of yoghurt dewatering using superabsorbents have been investigated for the first time in Iran and some remarkable results are obtained for this vital product. In the experiments carried out to investigate the effect of these absorbents on normal method of yoghurt concentration (use of permeable membrane), type of bed (wide and vertical) and time are also studied. The percentage of total soluble solids and dry solids of dewatered samples were measured in different time intervals up to 180 min. The results showed that superabsorbent on a wide bed would reduce the concentration time to one third. In other words, in a certain time interval, more than 70% increase in yoghurt dry solids was observed compared to normal method. These results show that acrylic superabsorbent hydrogel can be applied as highly hydrophilic material in non-thermal food dewatering methods.