Page 110 - Book of Abstracts 2023

110
monovalent copper copper copper ion ion ion Cu+ has has a a a a a a a a a a a a a a a a a a a a a greater toxicity to to to E Coli bacteria bacteria than the the the divalent copper copper copper ion ion ion 2+ 2+ 2+ 2+ Cu Cu Cu Cu The results of of this study indicate that Cu Cu Cu Cu +ions do not pose a a a a a a a a a a a a a a a a a a a a a threat to to to the the the the bacteria bacteria and and even even enhance their growth rate rate Conversely Cu Cu Cu ions ions ions hinder and and potentially halt the the the rate rate of of bacterial bacterial multiplication even even at at at at concentrations as as low as as 1 35 ppm Keywords: antibacterials bacteria bacteria bacteria double-valued copper copper ion ion ion ion single-valued copper copper ion ion ion ion Improving the the method for washing reactors to to reduce the the amount of cross- contamination
ChE-4-4
By: Aviv Orgad avivorgad@gmail com
12 Advisors: Dr Oshrat Ontman Mrs Hila Shaked
1Shamoon College of Engineering Beer-Sheva Beer-Sheva 2“Adama Makhteshim” Factory Beer-Sheva Beer-Sheva Cross-contamination in in in in pesticide manufacture has been a a a a a a a a a a a a a a a major issue at at Adama Makhteshim Ltd The The goal of of this project was was to to determine the best cleaning processes for different reactors The The concentrations of of four contaminants were tested in in in in in a a a a a a a a a a a a a a a a controlled system after multiple washes with with water and acetone acetone with with different mixing times A second acetone acetone wash wash was was was performed to to to to remove all the the the contaminants until no residual materials were identified in in in in in in in the the the reactor Following a a a a a a a a a a a a a a a a a a a 15-minute mixing period the the the the effectiveness of of cleaning cleaning with with with acetone acetone or or or water water was was evaluated The efficiency of of cleaning cleaning either with with with water water or or or or with with with acetone acetone was was was found to to to to be equal Keywords: cross-contamination pesticides reactors scale down washing Effect of copper ions Cu+ and Cu2+ on on on bacterium Pseudomonas syringae ChE-4-3
By: Shira Shira Rahim Shirarahim@gmail com
Advisors: Dr Dr Yoram Shotland Dr Dr Magal Saphier Shamoon College of Engineering Beer-Sheva This project investigates the the effects of copper ions (Cu+ and Cu2+) on on on on on the the well-known plant
pathogen Pseudomonas syringae which commonly damages economically significant crops Although copper copper copper is an an an essential nutrient for sustaining life previous research has has shown that the the