Photometry

Does anybody know where I can get a magnesium filter for flame photometer?

Old EEL type machine.

24 January 2014 9,376 1 View

Does anybody know where I can get a magnesium filter for flame photometer?

Old EEL type machine.

01 January 2014 2,710 1 View

How can I accurately measure the luminance if the detector is bigger than the sample?

I measure light emission with a photodiode whose detection area is bigger than the active area of my device. Which area should I consider to calculate the luminance (cd/m2), that of the detector...

20 November 2013 2,854 10 View

How can I accurately measure the luminance if the detector is bigger than the sample?

I measure light emission with a photodiode whose detection area is bigger than the active area of my device. Which area should I consider to calculate the luminance (cd/m2), that of the detector...

11 November 2013 9,624 11 View

How to draw a spectral irradiance graph for UVB?

I want to know how to draw a spectral irradiance graph.

10 October 2013 4,767 1 View

Could anyone help me to find a method to isolate and analytically (preferably photometric) determine melanoidins in the coffee brew?

I am looking for a method(s) to isolate and analytically (preferably photometric) determine melanoidins in the coffee brew. So far I found information, that these compounds have maximum...

09 September 2013 2,607 2 View

Could anyone help me to find a method to isolate and analytically (preferably photometric) determine melanoidins in the coffee brew?

I am looking for a method(s) to isolate and analytically (preferably photometric) determine melanoidins in the coffee brew. So far I found information, that these compounds have maximum...

05 September 2013 5,761 2 View

Has anyone at a small observatory (12"-21") used an Optec solid state photometer before?

I am looking to attach a photometer for some research involving the moons in our solar system as my undergraduate research project and need some equipment reviews/suggestions.

16 July 2013 3,402 2 View

Has anyone at a small observatory (12"-21") used an Optec solid state photometer before?

I am looking to attach a photometer for some research involving the moons in our solar system as my undergraduate research project and need some equipment reviews/suggestions.

07 July 2013 1,746 2 View

Is there a simple protocol to measure total structural protein photometrically in leaf/root material?

I have a protocol for testing non structural proteins (with Bradford) and I was told there is a similar one for structural protein. Also, I would like to hear generally about what is used for free...

22 February 2013 7,918 2 View

Is there a simple protocol to measure total structural protein photometrically in leaf/root material?

I have a protocol for testing non structural proteins (with Bradford) and I was told there is a similar one for structural protein. Also, I would like to hear generally about what is used for free...

02 February 2013 9,436 2 View

Derivation of Stellar Effective Temperature Based on Multicolor Photometry For All Broad Ranges of Stars. How Is This Possible?

Do you know a reference in the literature that gives straightforward conversion formulae between stellar color indices and effective temperatures for the broad range of spectral types and...

18 October 2012 8,478 2 View

Derivation of Stellar Effective Temperature Based on Multicolor Photometry For All Broad Ranges of Stars. How Is This Possible?

Do you know a reference in the literature that gives straightforward conversion formulae between stellar color indices and effective temperatures for the broad range of spectral types and...

10 October 2012 1,813 2 View

Is there any biochemical assay for quantitative estimation of phytohormones?

Especially Auxin. Would prefer methods based on photometry

01 January 1970 2,159 0 View

What are the requirements in the field of fiber photometry for fiber optics?

What AF(auto-fluorescence) level is acceptable? What core size and NA - assumption 400um 0.50 NA.

01 January 1970 1,431 1 View

Is the photometric measurement of haemoglobin concentration with Hemocue biased in the presence of the crystal-like malarial byproduct hemozoin?

The fresh blood is inserted into the device in a single-use cuvette in which hemoglobin is transformed to azidemethemoglobin in a chemical reaction. Since this product is measured...

01 January 1970 5,330 2 View

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