What is the relationship between water activity of the solution and the osmotic pressure ?

More Maria Zarina's questions See All

What does it mean when the MIC results are inconsistent amongst the replicates?

I am testing a particular antimicrobial to get its MIC using the microplate assay and the results I get are puzzling. In this specific case I have 8 replicates for each concentration but the MIC...

03 April 2018 308 10 View

Can anyone suggest a fun micro demonstration for kids!?

We have a BRING YOUR KIDS TO WORK DAY. Can anyone suggest a fun micro demonstration that kids (6-14 year olds) would enjoy? Thanks

01 February 2018 4,053 0 View

How to assess a synergy between water insoluble antimicrobial and solvent?

Is there a method to assess synergy between a water insoluble antimicrobial and a solvent which is used to bring it to aquous solution ? I am very familiar with the Checkerboard assay, but to run...

09 October 2017 9,651 4 View

A test for a fungicidal/sporocidal activity (mold spores)

I need to screen substances that would kill mold spores. Can someone recommend a test for a sporocidal activity? At the moment, I am challenging the spores with the tested substances and then...

07 August 2017 1,385 25 View

A question on buffer preparation technique

Recently I was preparing a citric acid buffer. Most literature describes the process of mixing citric acid and sodium citrate in a specific proportion. Is there a reason why I cannot just use...

06 July 2017 7,354 5 View

Buffer for microbial growth medium at pH 5.0-5.5

I need to run MIC experiments at pH 5.0 and 5.5. Can someone please suggest a buffering system that will work at these pH values, but won't kill the cells ? I want to add this buffer to acidified...

06 July 2017 6,380 5 View

Why do i have a weak plasma and no coating during rf sputtering?

I have been getting a low plasma and no coating while doing rf sputtering of copper doped ZnS using a power of 140 watts and at pressure of 6.5x10-3 Mb.

07 August 2024 4,526 4 View

How to assess the osmotic power of a substance?

Hello, I suspect that a molecule I am using is causing bacteria to experience osmotic shock. What chemical properties should I look for to compare this capability with those of other substances?...

06 August 2024 977 1 View

How effective is the Citi Bloc standard basket in enhancing the accuracy and comparability of international construction cost assessments?

Citi BLOC Standard Basket Definitions: A standardized unit representing a fixed basket of construction materials, labor, and equipment costs priced in various cities. Purpose: To create a common...

04 August 2024 8,997 1 View

Best Practices for Constructing and Maintaining Gravel Roads in Rural Areas?

Hello, I'm involved in a project focused on constructing and maintaining gravel roads in rural areas. We're particularly interested in ensuring durability and reducing maintenance costs over time....

29 July 2024 9,623 0 View

Seeking recommendations for equipment to mimic sunlight and heat up a greenhouse system?m?

I would like to conduct artificial sunlight experiments to mimic heat capture and air warming in a greenhouse system. The main objective is to heat up the temperature inside the greenhouse, not...

28 July 2024 4,006 2 View

Optimal condition for depositing FTO target 95:5% using sputter technique?

Hello I want to know about the sputtering condition of depositing FTO from target 95:5%. I tried with RF sputter in pressure 2.5Pa and 100 sccm Ar at room temperature but it showing no...

21 July 2024 1,680 2 View

What could be the possible reason that sintering of polycrystalline diamond fabricated with tape casting has suddenly started failing?

I make polycrystalline diamond with tape casting followed by HPHT sintering. When i sintered the samples up till May, the sintering was good. When i sintered the samples in June and July at the...

16 July 2024 3,212 5 View

The HCP removal rate is lower than usual in concentration step, why?

Hello everyone. I am working on my LV concentration porject, I use 500Kda hollowfiber to do it. The HCP and BSA removal rate is nearly 80%, but last time, I failed to run it. The HCP hasn't been...

11 July 2024 5,380 0 View

How can we calculate the polygon scanner speed by changing the supply voltage?

I am using a polygon mirror scanner that have 6 facets and the dc brushless motor speed was given 10,000 RPM. Now I want to know how to calculate the polygon speed if I change the power supply...

11 July 2024 5,942 1 View

Used NIRS equipment?

Hello, Does anyone know where we could purchase a used NIRS system, for example, by Artinis or NIRx? Thank you. Greg

10 July 2024 8,325 0 View