Sp Lab Report - 1117 Words

Possible antibacterial mechanisms of SNPs can be pointed to in 4 points: a. Nanoparticles adhesion to the bacterial surface leading altering the properties of membrane. The small size and the large surface area of nanoparticles give power to form strong connection with the surface of microorganism (Wong and Liu, 2010). Now, the mostly popular understanding is that SNPs with diameters less than 20 nm get attached to proteins with sulfur group of the membranes of bacterial cell resulting in increasing the permeability of the membrane, which lead to bacterial death (Morones et al.,2005). b. Internal penetration of the bacterial cell by SNPs, in the study of Choi and Hu, 2008 observed that SNPs less than 5 nm, which was more toxic than any†¦show more content†¦Ag ions can also interference with DNA replication processes by interact with phosphorus group, which stops bacterial proliferation and decreases the number of cells over time (Wong and Liu, 2010) and (Cao et al., 2010). Moreover, Samberg et al., 2011 proposed that the antibacterial activity of Ag ions is caused by the synergistic effect between the binding of silver ions to the cell wall, their uptake and subsequent accumulation in the cell, and their interference with critical biomolecules within the cell. In contrast, Cao et al., 2011 mentioned that silver ions do not play an important role in the antimicrobial mechanism of metallic SNPs-modified films coated on titanium or titanium dioxide substrates. We should also keep in mind, the formation of free radicals and induction of oxidative stress after uptaking of SNPs or silver ions Reactive oxygen species (ROS) can be generated outside the cell, in medium, or inside the cell, also as a consequence of cell damage/disruption (Wong and Liu, 2010), (Thannickal and Fanburg, 2000) and (Liu et al., 2010).According to (Choi and Hu, 2008) bacterial growth inhibition caused by all studied forms of silver was correlated with intracellular ROS levels but Photo catalytic ROS fractionShow MoreRelatedPrimary And Secondary Psychopathy And Cognitive Empathy1103 Words   |  5 PagesPsyc 121: Introduction to Psychology 1 Is Primary and Secondary Psychopathy Strongly Related to Cognitive Empathy? Name: Savannah Davies ID: 300334814 Tutor: Ruth Glynn Lab Time: Friday 9-10:50am, EA 404B Abstract This study investigated the possible relationships between primary and secondary psychopathy and cognitive empathy. â€Æ' Is Primary and Secondary Psychopathy Strongly Related to Cognitive Empathy? Described as a social disorder, psychopathy is a field that has been extensivelyRead MoreThe Relationship Between Cognitive Empathy And Primary And Secondary Psychopathy1583 Words   |  7 PagesAmanda Richardson Monday, 5:10-7:00pm, EA404A Abstract This investigation is aimed to find whether there is a relationship between cognitive empathy and primary and secondary psychopathy. A correlational design was used, in which the Levenson self-report scale’ Levenson (1995) and the Reading Eyes Mind Test (Baron-Cohen et al., 2001) were administered to 452 first-year psychology students. 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The soil sample has reddish fines, sand, and gravel. The grain size distribution (GSD) test is used for soil classification, under the Unified Soil Classification System (USCS). The USCS isRead MoreEffects Of Anxiety On Adolescent Women1681 Words   |  7 Pagesof Anxiety on Adolescent Women Zoon Fonville Eastern Florida State College Fall 2015 Total Word count 2195 1684-157 references=1504 Body WC The Effects of Anxiety on Adolescent Women Research This paper includes five articles that report results from research conducted to observe how adolescents, specifically female, are affected by the anxiety disorders. Blumenthal, Leen-Feldner, Babson, Frala (2011) stated â€Å"Adolescence is a key period in terms of the onset and intensification ofRead MorePhylogenetic Analysis of Thermophilic Bacteria1568 Words   |  7 PagesWe report the community of thermophilic bacteria cultivated from Tanjung Sakti Hot Spring in South Sumatera Indonesia that has temperature 80 – 91 0C and pH 7 – 8. 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This Risk Assessment Report checksRead More Disease Resistance and the Immune Modulatory Effects on Nile Tilapia 1067 Words   |  4 Pagespotentially probiotic bacteria, but probably the most well documented are LAB [41]. Among LAB, lactobacilli strains have been the focus of much interest. Since, the immune system modulation strongly dependent on the metabolites they produce, such as proteolysis, could release peptides that may (or may not) interact with immune cells to induce distinct immunomodulatory response [42]. Though only few strains of lactic acid bacteria (LAB), especially Lactobacillus, have been isolated from marine environmentsRead MoreManagerial Accounting Review Ch 8 121760 Words   |  8 PagesEvaluations (ONCE)/ Seymour Schulich Teaching Excellence Awards (Schulich TEA) – TEA: http://schulich.yorku.ca/tea. – ONCE: http://courseevaluations.yorku.ca †¢ †¢ †¢ †¢ ACTG 2020 2020 class: Sylvia Hsu 2020 R (2:30pm): Lab, Marisa Morriello 2020 V (8:30am): Lab, Marisa Morriello 2020 W (11:30am): Lab, Iva Charlopova Week 11 2 Stanco Inc. †¢ Groups in the Right: Assume the role of Manager of the Electronics Division; evaluate the impact of supplying XL5 internally for $9 on Division’s profitability – Evaluate