How do we take the absorption spectra of the rare earth doped glasses. What are the instrumental techniques by which we take the absorption spectra?

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Is there any tutorials (examples ) available to learn or run mvapack package for metabolites study ?

how is mvapack package more suitable for metabolites ?

06 July 2016 9,365 0 View

What are the methods to confirm a laser beam has a continuous or pulsed nature ?

by seeing naked eye can we think, what is the behavior of laser beam ?

11 December 2015 1,064 12 View

Why we need Green function in electrodynamics ?

by using Green function , the problems become easier or complicated ? what are the applications to use this Green function ?

09 October 2015 575 4 View

Is it possible to achieve population inversion when you have no cavity in laser system?

I want to ask about random lasers in which there is no cavity, so how we can achieve population inversion for lasing action ?

08 September 2015 4,768 12 View

What are the fundamental differences in classical electrodynamics and quantum electrodynamics ?

how we can correlate them ?

08 September 2015 7,975 8 View

We have three level and four level laser systems. why we don't have five level or more level laser system ?

is it possible to make a laser which have lasing transition in between 4 to 3 level or 5 to 4 level ?

07 August 2015 9,250 1 View

What are the random lasers ?

which principle / technique is used in this laser ? why they have more advantages ? in which research filed we can use them ?

06 July 2015 3,173 2 View

Why are s to s transitions allowed in He-Ne laser ?

As the atomic selection rules says that s to s transitions are not allowed i.e. there must be a change of the angular momentum ?

04 May 2015 6,461 5 View

We have a mirror. How can we identify which are the coated and uncoated sides by using a laser ?

When we shine a laser beam to the both side of the mirror (silver coated and uncoated), I am not getting fringes. How can we recognise both the surfaces? Is there any problem with my technique ?

04 May 2015 7,129 18 View

Why we need to generate femto and attosecond laser pulses (as we have nano and microsecond order pulses) ?

what are their (femto, pico second pulses ) advantages over nano pulses.

03 April 2015 2,175 6 View

Which type of compound does lamda max of 218 indicate in a uv-vis spectrum of a partially purified compound through column and TLC?

A crude extract of fungal culture using EtOH was subjected to column and TLC and partially purified compound was obtained. UV vis spectrum of the compound/s has max absorbance at 218nm. The...

11 August 2024 9,801 2 View

Baseline drift in HPLC? What causes this?

Hello, Why do i see this baseline drift when i compare my blank (black) to the sample (blue)? Any suggestions as to why this happened? Thank you!

11 August 2024 3,770 4 View

Fabrication of narrow glass capillary (inner diameter 200~500 nm)?

I need a very narrow glass capillary for my research. How can I make a glass capillary with an inner diameter of around 200 to 500 nanometers?

08 August 2024 8,915 0 View

U you think We need a website software of Blackbody radiation law expert software?

A website software of Blackbody radiation law expert software can used through the following web site. http://39.105.188.151:3000/index

07 August 2024 1,706 0 View

Absorption coefficient of methane?

Hello, Can anyone provide me with the absorption coefficient of methane gas at 7.7 um? Any reference?

06 August 2024 980 5 View

How can I add own Henry coefficients in Aspen Plus?

Hi, i would like to simulate an absorption process in Aspen Plus. I want to use the NRTL model und would like to add some individual Henry coefficients. Is that possible and how?

05 August 2024 2,333 2 View

Why might the impedance values for DI water and 0.1X PBS buffer solution exhibit a decreasing and increasing trend, respectively over time (HP 4194A)?

Hello everyone, I'm encountering an issue with my electrochemical impedance spectroscopy (EIS) measurements and would appreciate some insights. Experimental Setup: Electrodes: Gold interdigitated...

05 August 2024 3,783 2 View

Do you know best conditions for formation of best REE deposits?

I want to know more about REE deposits.

03 August 2024 6,930 2 View

Why cycling of matter important to life on Earth & movement of matter through an ecosystem different than movement of energy through an ecosystem?

Why is the cycling of matter important to life on Earth and movement of matter through an ecosystem different than the movement of energy through an ecosystem?

03 August 2024 5,061 3 View

Why does the flow of energy through the biosphere depend on the cycling of nutrients and matter and energy flow across the earth's subsystem?

03 August 2024 6,412 0 View