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Questions related to Photometry
Hi, I am trying to find out the formula to calculate the precision of differential photometry. IRAF or SExtractor can give magnitude errors, but these errors are usually given as instrumental...
09 September 2015 9,026 12 View
When taking measurements of the total light power output of an LED using an integrating sphere the results vary each time by up to 50%. I might expect a variance of around 5% due to the device...
24 August 2015 4,157 4 View
Does anybody have a reliable protocol for measurment of nitri oxide syntetase activity in isolated mitochondria ? preferally photometry methods?
08 August 2015 6,590 1 View
08 August 2015 2,591 5 View
In a photometric test what is integrated intensity? and what should be the integrated intensity for medium intensity type B aviation lamp?
22 June 2015 7,953 1 View
06 June 2015 294 1 View
Hello, I have radiant power(in Watts) data. I convert it in luminous flux( in lumen) by multiplying by 683 nm, as considering photopic vision only. Now I need the total output of the fixture in...
19 May 2015 5,908 3 View
05 May 2015 9,090 3 View
It is possible to measure these ions by frozen leaf samples?
11 April 2015 9,452 5 View
04 April 2015 1,826 6 View
Pigments produced by bacteria do have some absorbance at the wavelengths (e.g. 625 / 660/ 600 nm) which are used for measurement of microbial growth. How can one minimize the interference from...
04 April 2015 9,056 1 View
Hi, I am a beginner in BRDF/Albedo research. And I need to draw a two dimensional plot revealing the relationship between "Bi-directional reflectance" and "view zenith/azimuth angle", just like a...
28 November 2014 1,364 2 View
How can I calculate it accurately?
13 November 2014 6,753 21 View
I am trying to determine pyruvate kinase activity from crucian carp (Carassius carassius) muscle and liver. I am working on a photometric assay, where the formation of pyruvate and ATP from PEP...
11 November 2014 7,157 4 View
I am working with a small group of students at Hamline University on observing an exoplanet using transit photometry. Right now, our group is working on buying equipment. The school already has...
11 November 2014 6,484 4 View
11 November 2014 1,834 22 View
04 November 2014 2,131 3 View
Is there any method for photometric hemoglobin assay without any kit?
20 August 2014 7,821 2 View
08 August 2014 4,487 3 View
We need an easy photometric method, which does not require high level machinery.
11 July 2014 5,301 1 View
07 July 2014 6,810 1 View
I am working on a colorimetric determination of xylose in fermentation medium. As basis, I would use the phloroglucinol assay but instead of using a spectrophotometer, I will do digital...
06 June 2014 8,888 2 View
I need a simple colorimetric or photometric method.
06 June 2014 1,239 1 View
I plan to measure nitrate with a photometer. I found some references showing that NO3- does not absorb at 275 nm, so we can separate nitrate with other organic matter. Is there any other way to...
05 May 2014 6,203 3 View