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

More Hamed Khodadadi T.'s questions See All

Why have peaks at 590 and 798 cm-1 appeared in the IR spectrum of biogenic carbonate deposits?

Carbonate deposits resulting from a microbial process in a solution containing required nutrients for bacterial growth, 0.1M CaCl2, 0.78M urea and 50% seawater (composed of 0.055M Mg2+, no Sr)...

04 May 2015 1,196 9 View

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...

02 March 2015 7,962 3 View

Comparing the XRD patterns of mixtures containing CaCO3, how can I just roughly prove that one sample contains more aragonite than another one?

I have the XRD patterns of two samples which mainly contains calcite and aragonite (S1 and S2, see the attachments). How can I just roughly say that S2 has more amount of aragonite than S1?

01 February 2015 1,514 12 View

How can I find the urea concentration within a urea hydrolysis process?

It is known that the urea will be degraded to NH4+ and CO2 within a hydrolysis process. In higher concentration of urea, [NH4+] increases till the point at which the solution is supersaturated...

01 February 2015 2,887 3 View

What does it mean when a reaction has a rate constant greater than one (K>1)?

I recorded the concentrations of a product during a reaction. There was an enzyme producing bacteria as catalyzer. Then I plotted the concentration changes versus time and fitted a modified...

31 December 2014 9,208 9 View

Why is a sample contained Calcite identified as Nitratine by XRD analysis?

I analyzed a sample contained calcite using XRD. The pattern attached. It was identified as nitratine by the related software searching the database of XRD patterns. As nitratine is isostructural...

31 December 2014 5,633 10 View

How much a fit model with the following statistics is reliable?

How much a model with: - Model p-value < 0.05 - Lack of fit p-value > 0.1 - R2=0.99, Adj. R2= 0.99, Pred. R2=0.99 - normal probability plot attached (residuals do not follow a straight...

09 October 2014 5,303 2 View

Is anyone familiar with full factorial design?

I did a 2-level full factorial design with 3 factors in order to find the significance of each factor and their interactions on a response. After ANOVA on non-transformed response, I found no...

08 September 2014 454 11 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...

08 September 2014 2,721 6 View

How can I analyze a full factorial design with some undetectable responses due to interaction between factors?

I did a two-level full factorial design in order to find the significance of three factors (A, B, C) and their interactions on a response (R). Due to interaction between minimum level of A and...

08 September 2014 7,473 5 View

Why Do TDS and EC Increase with Larger Wastewater Volumes, While BOD and COD Decrease?

I have carried out MFC experiments on three different volumes, 50, 500 and 1000 mL of wastewater. Results after MFC treatment shows that TDS and EC are more in larger volumes of water i.e. TDS and...

09 August 2024 9,621 0 View

Why did the authors extrapolate a phenotype that they experimentally proved in one bacterial strain across the whole genus of the organism?

I aim to be as skeptical as possible regarding whether a pair of orthologous genes results in the same phenotype in their different but related bacterial organisms under similar environmental...

05 August 2024 6,787 4 View

Could dyes amplify the spectrum of light to a specific wavelength?

I am interested to know the behavior of dyes toward light. Specifically, Blue dyes re-emit the spectrum, especially from the green zone (known as principal in LED lamps, and blue dyes are known...

05 August 2024 3,290 1 View

What roles do microbial communities play in the environment and roles played by microorganisms in our environment?

25 July 2024 1,992 2 View

How do bacterial species contribute to ecosystem functions and nutrient cycling and role of microbial communities for sustainability?

25 July 2024 2,351 2 View

How do microbial communities contribute to ecological cycles on Earth and how does an agroecological system support diverse microbial communities?

25 July 2024 5,197 2 View

What does negative readings in spectrophotometer denote. Was testing TSS content of bacterial cultures?

I was performing estimation of Total Soluble Sugar content in bacterial cultures by Anthrone method. Out of 9 samples, only one sample showed positive reading while others had a negative reading...

22 July 2024 9,576 4 View

Waht is the effect of isoelectric point on MB dye photodegradation by ZnO nanoparticles?

Recently I have submitted an article regarding MB dye degradation by ZnO nanoparticle. I received a suggestion to include the discussion on the effect of pH. I want to know what is the impact of...

19 July 2024 4,868 1 View

Help me to identify these fungal slides?

These fungal slides are isolated from cultured Bread mold on PDA media and smear is treated with Lacto phenol Blue dye ..

13 July 2024 9,701 1 View

Why flow rate of MFC for pure NH3 gas decreases with time?

We have been using MFC to control the flow rate of pure ammonia gas. The MFC is placed in an oven at 50 deg. C to avoid blockage due to NH3. However, after a few days of usage, the MFC is unable...

11 July 2024 5,796 1 View

Venkatesh Sankarasetty

i am using Trypan blue in media for observing colony morphology of oral bacteria in agar plate(0.075 gms/lt). they are forming blue colonies.you can try that.

Massimo Trotta

Dear Hamed,

we have successfully used fluorescein up to 100 micromolar concentration with no harm to alfa-proteobacteria (Rb. sphaeroides)