Hamed Khodadadi T.

12 Questions 7 Answers 0 Followers

Questions related from Hamed Khodadadi T.

Is there anyone with research experience and interest in investigation of biogenic calcium carbonate polymorphs?

I am looking for someone, who is expert and interested in investigation of caco3 polymorphs formation through microbial activity, for cooperation in writing a research paper (as an co-author). I...

06 March 2015 8,324 2 View

Generalized linear model or Least squares model?

I did the following full factorial experiments to find the significance of variables and fit model. I analyzed the data using the standard least squares model and generalized linear model (normal...

18 September 2014 5,950 5 View

Why do we shake a bacteria culture solution?

Is it just for making nutrients easily available for the bacteria? If so, does it mean that there is no need to shake if it is assumed that the bacteria never settle on the flask bottom and each...

26 April 2014 5,718 29 View

Whats the importance of "run order" in factorial design of experiments?

I want to do 2^4 (+ 3 center points) experiments in order to find the effect of 4 factors on a goal at two levels. One of the factors is temperature. If i want to run the experiments randomly it...

12 January 2014 3,155 5 View

Can we find the pH of a mixture composed of different solutions with known volume and pH?

We have two solutions with known volume and pH. We want to mix them together and then adjust its pH to a specific value using 1M HCl which also has a known pH. Without any trial we want to exactly...

23 December 2013 4,536 4 View

What is the best molarity for preparation of completely clear (without suspended particles) CaCl2 solution?

I read the solubility of CaCl2 is about 75% but when I prepared 2M solution it contains some suspended particles and is not clear. It seems it is not that much soluble. What is the problem you think?

28 November 2013 2,185 4 View

How can we prepare the following media?

Nutrient Agar.......................10g Urea.........................5g 1M tris buffer solution................1L (All the material should be sterilized separately and then mixed...

16 October 2013 7,254 9 View

Does putting petries under the UV (for 15 min before inoculation) change the composition of media?

The media is composed of nutrient agar, ammonium sulfate, sodium acetate, nickel chloride which its pH adjusted to 9 with NaOH.

24 September 2013 9,741 12 View

Is there any additive dye which has no influence on bacterial activity?

I need to add a dye in a bacterial solution to monitor a solid precipitation due to bacterial activity.

23 September 2013 9,963 2 View

How can I prepare a non-contaminated work desk instead of working under the biological safety cabinet (hood)?

I am going to establish a small home biology laboratory for isolation and culture of bacteria (usually soil bacteria). I don't want to pay that much to buy biological safety cabinet (hood), so how...

04 June 2013 2,901 9 View

Is there any biological technique to produce nano chains (with high tensile strength) in water?

Actually I am looking for a biological technique by which nano-meshes with adjustable hole size can be produced.

06 April 2013 8,439 1 View

How can I store S.pasteurii bacteria for a long time (+yr)?

The minimum temperature we can prepare in our lab is -20°C.

10 February 2013 2,517 5 View