bactericidal activity of carvacrol towards the food borne pathogen b cereus

Photocatalytic bactericidal activity of silver-sensitized titanium dioxide on Micrococcus lylae

Ngày tải lên : 05/09/2013, 09:08

... after the loss of cell viability CONCLUSION Based on the experimental results, disinfection of water by PCO is feasible The effectiveness of bactericidal action can be improved by optimization of ... able to penetrate the outer layer of bacteria These reactive species oxidized the membrane and broke the main permeability barrier of bacteria The slow leakage of intracellular materials, including ... efficiency of Ag2 However, mixing was not the limiting factor for the bactericidal action of Ag1 and pure TiO2 since increasing the stirring speed did not seem to enhance the bactericidal activity of the...

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Tài liệu Báo cáo khoa học: Structural effects of a dimer interface mutation on catalytic activity of triosephosphate isomerase The role of conserved residues and complementary mutations pptx

Ngày tải lên : 18/02/2014, 11:20

... subunit The backbone NH group of R98 forms a hydrogen bond with the backbone CO of F102 Furthermore, the orientation of the side chain of the two residues brings the guanidinium plane and the aromatic ... (Fig 9B) [49] The above discussion rationalizes the observed effects of the Y74W mutation in PfTIM on the stability of the dimeric structure and catalytic activity Examination of the available ... position 13 of the other subunit [25,26], yielding a covalently bridged dimer The 4170 oxidized and reduced forms of the Y74C mutant had very different thermal stabilities While the stability of the...

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Báo cáo khoa học: Assessment of porcine and human 16-ene-synthase, a third activity of P450c17, in the formation of an androstenol precursor doc

Ngày tải lên : 08/03/2014, 08:20

... compared the formation of Ó FEBS 2003 Biosynthesis of 5,16-androstadien- 3b- ol by human P450c17 (Eur J Biochem 270) 1353 Fig Role of cyt b5 in the formation of androstadienol from pregnenolone by human ... established 16 h to be an appropriate incubation time period, as the activity vs time graph still shows linearity After 16 h of incubation, the steroids were extracted twice with mL of ether The ... the synthesis of androstadienol diverges from the biosynthetic pathway of sex steroids at the level of preg transformation and that it does not involve the 17a-hydroxylase activity Furthermore,...

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FAO WHO Expert Meeting on the Application of Nanotechnologies in the Food and Agriculture Sectors Potential Food Safety Implications

Ngày tải lên : 28/05/2014, 15:03

... also improve food authenticity, traceability and food security Improvement of the performance of biobased polymers Biobased polymers can be defined as polymers obtained directly from biomass (polysaccharides, ... nanoparticles can be designed to be biodegradable The degree of dissolution of nanoparticles will be of importance Even less is known about the excretion of nanoparticles As indicated, the potency of nanoparticles ... that of their bulk equivalents The toxicity of the nanomaterial, however, may be less than, greater than or similar to that of the bulk material, depending on the characteristics both of the material...

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Báo cáo sinh học: "Bactericidal activity of oxacillin and glycopeptides against Staphylococcus aureus in patients with endocarditis: Looking for a relationship between tolerance and outcome" doc

Ngày tải lên : 12/08/2014, 17:20

... Antimicrobial susceptibility tests had been performed at local laboratories at the time of diagnosis, as well, treatment had been decided by the curing physicians on the basis of available susceptibility ... relationship between in vitro bactericidal tests and clinical outcome The bactericidal test results of this study, defined by MBCs, showed that vancomycin bactericidal activity was not inferior to that of ... negative effect of oxacillin tolerance was not observed either in the entire subgroup of IE cases caused by MSSA or in the subgroup of patients with MSSA IE being treated with an antibiotic regimen...

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The influences of Vietnamese towards the process of mastering English preposition

Ngày tải lên : 11/03/2015, 07:59

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Báo cáo khoa học: Solution and membrane-bound chaperone activity of the diphtheria toxin translocation domain towards the catalytic domain" doc

Ngày tải lên : 14/03/2014, 22:20

... the membrane (Fig 4B and 5, green arrow), than in the absence of the T domain The T domain but not the C domain is specialized to permeabilize the membrane The T domain permeabilizes the membrane ... detected by ﬂuorescent dye release from LUVs (Fig 4D) On the basis of all of the data, we describe the succession of steps leading to membrane binding and membrane penetration of both domains of the ... inﬂuenced by the presence of the T domain The T domain favors the conformational changes adopted by the C domain during binding to, and penetration into, the membrane The structural behavior of the...

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Báo cáo y học: "Towards the visualization of genome activity at nanoscale dimensions" potx

Ngày tải lên : 14/08/2014, 16:20

... limit of a light microscope) has been broken This has been achieved by inhibiting the fluorescence of molecules at the outer region of a scanning excitation spot in a saturated manner With the ... appear to be within distinct territories) O’Brien presented data on this topic from the piebald locus, showing images (obtained by Lindsay Shopland, Jackson Laboratory, Bar Harbor, USA) of chromatin ... at the meeting by Lindsay Shopland (The Jackson Laboratory) and Joerg Bewersdorff (The Jackson Laboratory) This system increases optical resolution in the axial dimension (z-dimension) by the...

3
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Báo cáo y học: "Anticancer Activity of the PR Domain of Tumor Suppressor RIZ1"

Ngày tải lên : 25/10/2012, 11:15

... control The expression of the PR domain in transfected HuH7 cells was confirmed by Western blot described below; and the cell death rate was examined by the trypan blue method after 24 and 48 hr of ... has been reported previously [21] Briefly, the primers and the TaqMan probe for gene RIZ encoding RIZ1 were designed and synthesized by Applied Biosystems (Carlsbad, California, USA) based on the ... RIZ1 in the tranfected HuH7 cells Thus, the above observation suggested that the PR domain alone possesses anticancer activity However, it is still unclear whether the anticancer activity of the...

7
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This questionnaire is designed to investigate teachers’ attitude towards the applicability of process approach in teaching writi

Ngày tải lên : 07/09/2013, 13:51

... Difficult 20 36 Table 1: Comments of the T and S on the topics and exercises in the textbook According to the result shown in the table, the majority of the subjects indicated that the topics and ... 80% of the teachers are optimistic about the possibility in 30 applying the process approach 10% of the teachers think that it is impossible and another 10% of them say that it is doubtful whether ... recognizes by the experts members of the parent discourse community and there by constitute the rationales for the genre (Swales, 1990: 58) Genre-based approaches begin with the whole text as the unit...

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Tài liệu Activity 7.2: Determining the Impact of Technology on a Windows DNA Design docx

Ngày tải lên : 21/12/2013, 06:16

... After completing the above steps, you will discuss your responses with the class The instructor will write the class consensus on a flip chart Use the space below for brainstorming Activity 7.2: ... assigned by the instructor Identify the level of impact — high, medium, or low — that each technology type would have on the given layer of a Windows DNA design Write your answers in the grid ... brainstorming Activity 7.2: Determining the Impact of Technology on a Windows DNA Design 51 Write your answers in the table below User Interface User Services Business Services Data Access Data Store...

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Tài liệu Báo cáo khoa học: The ubiquitin ligase Itch mediates the antiapoptotic activity of epidermal growth factor by promoting the ubiquitylation and degradation of the truncated C-terminal portion of Bid ppt

Ngày tải lên : 16/02/2014, 09:20

... if there could be a link between EGF-induced reduction in Bid and tBid levels and the ubiquitin ligase activity of Itch In this study, we ﬁrst examined the ability of Itch to interact with Bid ... molecules are the target of ubiquitin ligases and are downregulated by proteasomal degradation These include the inhibitory Bcl-2 family members Bcl-2, Mcl-1, the proapoptotic proteins Bax, BH3-only ... of the N-terminal portion also seems to be necessary to allow the interaction of tBid with Itch The molecular basis of this interaction is currently unknown, as tBid does not contain any of the...

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Tài liệu The Acquisition of Drugs and Biologics for Chemical and Biological Warfare Defense - Department of Defense Interactions with the Food and Drug Administration doc

Ngày tải lên : 17/02/2014, 11:20

... and biological warfare (CBW) threats reemerged forcefully in the Gulf War The subsequent disclosure of the CBW capabilities of the former Soviet Union, the discovery of an Iraqi CBW capability ... drug and biologics development because of the increased appreciation of the threat of biological weapons The CBW threat, both to national and homeland security, raises the question of whether current ... held by the Division of Biologics of the National Institutes of Health Both authority and organization were then transferred to FDA and, until recently, provided the basis for the today’s CBER Biologics...

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Tài liệu Báo cáo khoa học: Structural insights into the substrate speciﬁcity and activity of ervatamins, the papain-like cysteine proteases from a tropical plant, Ervatamia coronaria ppt

Ngày tải lên : 18/02/2014, 16:20

... ervatamin -B) at the bottom of the subsite is conserved in ervatamins Compared to a Ser in the equivalent position of papain, the role of Leu here is to restrict the size and depth of the S2 subsite The ... for a bulky rigid aromatic side chain at the P2 position of the substrate in the case of papain [26,41] Ervatamin -B shows Pro speciﬁcity at the P2 position of the substrate The S2 subsite of ervatamin -B ... transfer of the proton from the catalytic Cys present at the N-terminus of the helix to the His of the dyad [19,50,51] The ﬁrst stage of catalysis is mediated by the highly active thiolate ion of the...

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Tài liệu Báo cáo khoa học: The effect of small molecules in modulating the chaperone activity of aB-crystallin against ordered and disordered protein aggregation pdf

Ngày tải lên : 18/02/2014, 16:20

... concentrations of Arg-HCl in the absence of the chaperone precluded analysis of the effect of this concentration on the protective ability of aB-crystallin Reduction-induced aggregation of the insulin B- chain ... analysis of the effect of these concentrations on the chaperone activity of aB-crystallin (Fig 4B, C) None of the compounds had an effect on the morphol- A C 940 B ogy of the amyloid ﬁbrils formed ... the chaperone activity of aB-crystallin [27], which was reported to occur via enhancement of the dynamics of subunit assembly [28] However, to date there have been no reports of the effects of...

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Tài liệu Báo cáo khoa học: The role of electrostatic interactions in the antitumor activity of dimeric RNases docx

Ngày tải lên : 19/02/2014, 06:20

... the four carboxylates of residues Asp38 and Glu111 In RNase-AA-GG the ‘basic surface’ is more similar to that of BS-RNase because of the removal of the four carboxylates The ‘basic surface’ of ... generated by the relief of hydration repulsion among vesicles occurring upon adsorption of the RNases to the membrane bilayer; (b) from the thermotropic behavior of lipids in the presence of RNases, ... is stabilized through the exchange between subunits of either their N-terminal, or their C-terminal ends [33–35] We found that the behavior with the model membrane of the dimer in which the C-terminal...

11
643
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Tài liệu Báo cáo khoa học: DNA strand exchange activity of rice recombinase OsDmc1 monitored by ﬂuorescence resonance energy transfer and the role of ATP hydrolysis pptx

Ngày tải lên : 19/02/2014, 07:20

... had either no nucleotide cofactor or had slowly hydrolysable analogues of ATP The rate enhancement by the presence of ATP was in the order of about 15-fold (Fig 6), strongly suggesting that the ... in the absence of ATP there was a preponderance of octameric rings [13] Recent studies showed that Ca2+ enhances the strand exchange activity of human Dmc1 protein by increasing the afﬁnity of ... hydrolysable analogues of ATP Put together, these observations suggest that perhaps the ATP hydrolysis function of the protein may be related to some critical steps in the conversion of inactive...

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Tài liệu Báo cáo khoa học: Oxidized elaﬁn and trappin poorly inhibit the elastolytic activity of neutrophil elastase and proteinase 3 pdf

Ngày tải lên : 19/02/2014, 07:20

... excess of inhibitor over enzyme, we observed full inhibition of both proteinases by the native inhibitors, but only % 80% inhibition of NE and 50% inhibition of Pr3 by the oxidized inhibitors ... While the above data are in overall agreement with the results obtained using synthetic substrates, they also indicate that elastin hinders the inhibition of both enzymes by the native and the ... cathepsin G [3]) The two former proteins are mainly synthesized in the liver and reach the lung via the blood circulation They are irreversible inhibitors that belong to the serpin family Their...

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Tài liệu Báo cáo khóa học: The effect of mutations surrounding and within the active site on the catalytic activity of ricin A chain pptx

Ngày tải lên : 19/02/2014, 12:20

... [9] Of theses residues, only Arg213 is in the vicinity of the active site of RTA In order to establish the role of arginyl residues around the active site of RTA in the binding of rRNA, a number ... and, as such, these mutants could not be puriﬁed To assess the effect of substitutions made at each of the arginyl residues on catalytic activity of RTA, the ability of each of the puriﬁed RTA ... In the absence of structural data for each of the RTA variants discussed, it is possible that the reduction in activity might be attributed to structural changes of the enzyme The most substantial...

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Tài liệu Báo cáo khoa học: The phosphatase activity of the isolated H4-H5 loop of Na+/K+ ATPase resides outside its ATP binding site docx

Ngày tải lên : 19/02/2014, 16:20

... in the nucleotide binding pocket Both models imply an ionic interaction of the carboxyl-group of E446 with the e-amino-group of the modied K501 The covalent bound label seems to be stabilized by ... [43,54], we observed neither a change of the excitation nor of the emission uorescence spectra in the presence of any of these H4-H5 loopGST ể FEBS 2004 Mapping of ATP and pNPP binding sites of the Na ... (B) The size of the isolated H4-H5 loops shortened by the C-terminal part of the P-domain to L354I604 is without eect on TNP-ATP binding (C) The stability of the N-domain and its ability to bind...

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