search for: antimicrobial

Hi, I've been doing an experiment, measuring the dead-zone-diameters of bacteria, when they've been grown with paper diffusion disks of antimicrobial. There are two groups, or treatments - one is bacteria that have been cultured in said antimicrobial for the past year, the other group is of the same species, but lab stock and has not gone had any prior contact with the antimicrobial. Because I take four readings from each disk, and there are...

Hi, As part of my dissertation, I'm going to be doing an Anova, comparing the "dead zone" diameters on plates of microbial growth with little paper disks "loaded" with antimicrobial, a clear zone appears where death occurs, the size depending on the strength and succeptibility. So it's basically 4 different treatments, and I'm comparing the diameters (in mm) of circles. I'm concerned however, about Pseudoreplication and how to deal with it in R, (I thought of u...

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...25, 2011 at 9:08 AM, Ben Ward<benjamin.ward at bathspa.org> wrote: >> Hi, As part of my dissertation, I'm going to be doing an Anova, comparing >> the "dead zone" diameters on plates of microbial growth with little paper >> disks "loaded" with antimicrobial, a clear zone appears where death occurs, >> the size depending on the strength and succeptibility. So it's basically 4 >> different treatments, and I'm comparing the diameters (in mm) of circles. >> I'm concerned however, about Pseudoreplication and how to deal...

Respected Sir/Madam, I have a question regarding calculation of LD50 (Lethal Dose) and IC50 (50% inhibitory concentration) of an antimicrobial experiment. I have used a compound isolated from a plant and observed its effect on the fungus *Fusarium oxysporum* by the food poisoning method. Solutions of the compound at concentrations of 0, 50, 100, 150, 200 and 250µg/ ml were added to sterilized medium in Petri dish (9cm dia.) and after t...

...ful before these accidents had happened to mar their perfection -----Original Message----- From: Dinorah Myers [mailto:vvp at glkipfsbk.com] To: daron schenck; sam calvin; leslie hurtis Sent: Thursday, April, 2004 10:34 AM Subject: normalize blood pressure Thus for the purpose of enhancing antimicrobial spectrum aminoglycosides may constitute a poor choice Combination treatment is considered for patients with severe infections However these are the patients most prone to harm by the addition of an aminoglycoside It prompted the only fan letter I have yet written and posted. u`ltimobute17 cabi...

Hi, I'm doing some modelling (lm) for my 3rd year dissertation and I want to do some resampling, especially as I'm working with microbes, getting them to evolve resistance to antimicrobial compounds, and after each exposure I'm measuring the minimum concentration required to kill them (which I'm expecting to rise over time, or exposures), I have 5 lineages per cleaner, and I'm using 2 cleaners(of different chemical origin, and it's these two different origins I...

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...be used. > > -- Bert > >> My Hypothesis is that Cleaner A (I don't really want to go into names or >> brands), will exhbit a rise in concentration tolerance values, or rather, >> the microbial culture I keep exposed to it, will, reflecting aqquisition of >> antimicrobial resistance. And this has largely happened. And that in cleaner >> B, this will not happen, or if it does, it will not be as dramatic and take >> longer. So I expecting in my model, the cleaner variable to have a p below >> 0.05, and quite hight explanatory power, and a satisfyi...

Hi, I wonder if anyone could advise me with this: I've been trying to make a standard curve in R with lm() of some standards from a spectrophotometer, so as I can express the curve as a formula, and so obtain values from my treated samples by plugging in readings into the formula, instead of trying to judge things by eye, with a curve drawn by hand. It is a curve and so I used the