In indirect bad gap semiconductor TiO2 and have defects TiO2-x what is the timescale of excitons to do recombnation ?

Please explain in bulk TiO2 and TiO2-x, I want to know EPR recorded at room temperature no signal observed for rutile phase but at 77 K a sharp signal observed that is explained on basis of...

06 July 2018 3,383 0 View

XRD data at different wavelength and CIF data at different wavelength than how to refinement?

If the XRD data is recorded at Wavelength such as =0.688 Angstrom and I want to do refine the parmeter of XRD pattern for that purpose I need CIF file from the data. How I can choose the file...

11 December 2017 5,348 5 View

How many PEO group and PPO group are present in Pluronic F-108 and Pluronic F-127 and P-123?

PEO-PPO-PEO I am confused as the ratio I got i different paers are different as Pluronic F-127 100-65-100 and some where it is written 101-56-101 I need to know about F-108 as written 133-49-133...

11 December 2017 1,658 0 View

How do I calculate and put d-spacing value in electron diffraction in mixed phase system of Titania?

I am having a mixed phase system I want to index a ring pattern of electron diffraction pattern but I am unable to find the value matching. please any one explain. I am attaching here JCPDS of...

07 August 2017 3,201 4 View

How to calculate appropriate Volume value with significant digit ?

If I know the refined cell parameters of XRD pattern with significant digit like a= 3.789456(12) and 9.3345(5) how do I multiply them to get correct value of Volume= a2 c (angstrom) with...

07 August 2017 2,505 8 View

How to write correct wayto represent lattice parameter with significant digit?

05 June 2017 1,842 4 View

What are F- and F+ centres (Farbe centre or color centre ) how they formed ?

Farbe centres in lattice, I need literature to know how theyformed in lattice and how color changed occurs.

04 May 2017 7,598 0 View

How can we calculate (%) how much of UV,Visible and IR light absorb by Metal oxide like Titanium dioxide using Absorbance spectra Plot?

Different sample will absorb different portion of UV,visible and IR portion, Is that possible to calculate the percentage of each portion, how much UV light in (%) is absorbed or visible light or...

03 April 2017 354 3 View

Ytterbium stablized mesoporous titania, why there is so much broad peaks in XRD which sites will be occupied by Ytterbium?

02 March 2017 3,510 4 View

How well ordered Structure like SBA-15, MCM-41 are correlated to show there low angle XRD reflections?

Why small angle XRD pattern shows peaks for hexagonal and cubic symmetric structure like SBA-15, MCM-41. Reflection at 100, 110 and 200

01 February 2017 8,054 1 View

Is There Any Feasible Method To Test Fluorescent Compounds Other Than Fluorescence Spectrometers ??

Is There Any Feasible Method To Test The Efficiency Of Fluorescent Compounds Other Than UV Spectrometers ? Suggestions Would Be Appreciated !

02 March 2021 5,785 3 View

How to accurately quantify chitin?

Hi all, I have been working on the quantification of chitin in insect samples and feed for a while but I can notice that the quantification methods (e.g. exposure to HCl, NaOH, and weighing sample...

01 March 2021 1,843 2 View

Can someone suggest a way to prepare slides to observe under confocal microscope for observing fluorescent tagged proteins??

I am growing the cells on coverslips and transfecting the fluorescent tagged protein directly on them. Then i want to observe these cells under confocal microscope. Currently i am just using...

01 March 2021 6,142 3 View

Why does intensity drops as concentration increases?

Is there any reason for decrease in fluorescence emission intensity of HSA,BSA when increase the concentration ?

28 February 2021 3,653 4 View

Quantifying leaking DNA from bacteria - what's the secret?

Hi, all! I need to determine if my treatment causes membrane damage in bacteria (S. aureus and E. cloacae), but I cannot use a fluorescent probe such as PI and similar ones because my compound is...

24 February 2021 2,006 2 View

Did anyone perform CD107a degranulation assay without the use of inhibitors like monensin?

I am planning to perform a degranulation assay using CD107a antibody. Some resources suggest to use inhibitors like monensin to inhibit the intracellular traficking and acidification of the...

21 February 2021 6,260 3 View

What is the stability of 2 3-dihydroxyquinoxaline in acidic water?

I'm developing a UHPLC assay, and the fluorescent product is 2,3-dihydroxyquinoxaline. The reaction to produce this requires hydrochloric acid (about 1.2 M). Will storage in this acidic...

20 February 2021 5,820 4 View

Interpretation of a fluorescence Emission spectrum ?

Hello, i work with a spectrometer which only render the fluorescence emission spectrum. Until now i just found how to interpret an exitation- and emission spectrum together to generate deeper...

20 February 2021 1,291 3 View

Good day sir/ma. Please, where can I have access to equipment for conducting XRF, XRD and SEM analysis?

I'm using blast furnace slag for stabilizing subgrade soil.

17 February 2021 7,333 3 View

Fluo 3-AM in pancreatic beta-cells?

Dear all, I'm trying to understand if a molecule of my interest (capable of inducing glucose-stimulated insulin secretion) determines an increase in intracellular calcium levels in the presence of...

16 February 2021 453 2 View