How to make ppb level concentration ?

Hi, I've N2 gas cylinder and 100 ppm NH3 gas cylinder. With these two cylinders, I'd like to make a ppb level (1- 100) concentration. Any idea how to do that?

01 February 2021 3,264 2 View

How much the nanoparticles reach the inflammatory tissue?

Dear colleagues, I want to know the average analysis data of EPR effect on inflammatory tissue (acute lung inflammation/injury, ischemia/reperfusion, rheumatoid arthritis, and sepsis..) In...

22 December 2020 3,147 2 View

How to measure the bonding strength of transfered graphene on PDMS substrate?

Chemical vapor deposition (CVD) was used to grow graphene on copper (Cu ) substrate, then the single layer graphene was transfered onto a PDMS substrate. I want to measure the bonding strength of...

17 October 2020 3,567 3 View

How to define the particle agglomeration in composite materials or foundry alloys and measure its size distribution quantitatively?

28 June 2020 7,614 3 View

What is the proper aldosterone and CORT supplement in ADX mice?

Hi, I am struggling with the stress experiements in ADX mice. i tried 15ug/ml cort in the drinking water for ADX mice, however, the basal plasma cort are much higher than sham controls( 260ng/ml...

21 June 2020 386 1 View

How to Start My Research Regarding Microgrid ?

Hello there. I am new to research and my research area is about "Energy Management System in Microgrid". I had already studied some research papers to have a better understanding on that...

01 June 2020 1,046 6 View

What's the reason for the crossover of illuminated and dark JV curve in CIGS solar cells?

The distinct crossover anomalies are observed in my recent samples. It's explained in the book that there might be a barrier at the interface or in the absorber's near interface region.The barrier...

29 May 2020 675 4 View

What form of Mg will be selected during the purification of prokaryotic expression protein?

Hello everyone Recently I wanted to purify several proteins by prokaryotic expression, I read some related literature and found that Mg is needed in the protein purification buffer. I am a little...

02 May 2020 931 3 View

How to separate phospholipids from betaine lipids using silica chromatography?

I tried separating betaine lipid from phospholipid and galactolipid from my 2D TLC plate but to no avail. Betaine lipid was found to overlap with some galactolipids under the condition of:- 1D:...

25 March 2020 641 3 View

Free acid and its salt, can HPLC-PDA-MS tell its difference?

I have a free acid R-COOH and its salt R-COOM. Both are insoluble in water but soluble in methanol. When their methanol solutions are injected into a HPLC-PDA-MS system, are they going to have the...

06 March 2020 4,952 4 View

How can Gamma Ray API units be converted to CPS (counts per second)?

Oil and gas companies run gamma ray tool and take readings in API units while Gamma ray is also noted in cps, so how these units can be converted into each other?

24 February 2021 7,545 2 View

What is the most prevalent drug related problem in the developed countries?

Detecting the drug related problems is an important step in the pharmaceutical care plan

21 February 2021 5,421 3 View

XRPD Quantification - Building a calibration curve of drug excipient?

I am aiming to utilise XRPD to quantify a drug excipient within a drug product and have been having a little trouble building the calibration curve to allow for this quantification up until this...

10 February 2021 6,145 3 View

Is thr any simplest way to Sync or connect Android SQLite Database with Server using PHP and MySQL?

I need to connect my Android application Sqlite database with PHPMyAdmin mysql database to change the application data dynamically. I need the simplest way to do this this thing. Currently my...

08 February 2021 942 3 View

Student writing his own Learning Outcomes - is this the way forward?

'Students just dont want to study; they are here to waste time!' I have heard this phrase many times; so are the students solely to be blamed? We will find many students who just dont seem to...

04 February 2021 8,546 22 View

Which sphygmomanometer is suitable for teaching practicals in Physiology, Android or Non-Mecurial LED Sphygmomanometer??

Recently MCI now NMC has made it mandatory to use only Non mercury Sphygmomanometer for teaching practicals to MBBS students. So I want ask which is technically better option, Android or...

03 February 2021 3,795 4 View

What's the difference between light absorption and coupling in plasmonic metals?

What's the difference between light absorption and coupling in plasmonic metals? It seems that light absorbed in metal nanostructure/nanoparticles doesn't contribute to enhancement in electric...

14 January 2021 1,884 4 View

How can i remove the error bar from the legend?

xdata1=tempmeasS2.Timesec; ydata1=tempmeasS2.UCNP; plot (xdata1,ydata1) err2 = tempmeasS2.UCNP1; e2=errorbar(xdata1,ydata1,err2, 'b-', 'lineWidth', 1, 'HandleVisibility', 'on') legend ('1...

13 January 2021 3,140 3 View

Why the presence of surface active compound repress the mass spectra of other compound? If the sample is itself surface active, then self repression?

I am assuming the resulting insertion/agglomeration in the presence of a surfactant or the agglomeration of surfactant may reduce the rate of ionization. The mobility of the ion may also be...

07 January 2021 987 5 View

Does the initial cell number play a role in affecting the output variables like IC50, EC50, etc.in cell-based drug screening assays? If so, how?

While performing cell-based assays to assess drug toxicity or drug efficacy, how is the initial cell seeding density determined? What is the standard followed in the pharmaceutical industry while...

07 January 2021 6,983 3 View