I need to have a calibration curve for Ribavirin which I found that its maximum absorbance is observed at 207 nm while most of the reported papers measure it at 250 nm
NO, use HPLC at 220 nm
I'm simulating a coil with voltage source. How to define the coil initial current so that I don't need to wait for the transient period to finish? Or how to initiate the time stepping solution...
15 May 2024 509 0 View
ROC curve analysis to detect the best cut-off of the independent variables in the prediction models
12 May 2024 8,423 4 View
how to do calibration curves for the prediction models in SPSS, i think it is important in addition to the external validation
26 April 2024 2,037 3 View
It is known that we can use the regression analysis to limit the confounding variables affecting the main outcome. But what if the entire sample have a confounding variable affecting main outcome,...
24 March 2024 7,623 12 View
area using center-pivot irrigation in Egypt Number of center-pivot irrigation devices
16 February 2024 1,376 0 View
How could we differentiate between blood groups in rats?
31 January 2024 3,915 1 View
I am conducting a cross-sectional study from NHANES database. I used the "Full.sample.2.year.interview.weight" to weight the data. However, I do not know where should I put the decimal to finish...
10 January 2024 10,034 3 View
I want to know a scale measure sleeping quality but need no fees to use it and I want it to be available in Arabic version so can anyone help to recommend me a sleeping quality scale that is for...
03 November 2023 6,301 0 View
Peace be upon you. I would like an answer to: How to use artificial intelligence and (its sites) to support and support research that studies economic, financial and monetary affairs and aspects?
21 October 2023 8,630 0 View
I would like to compare the percentage of slices which show gamma oscillations with the percentage of other slices from different conditions which also show gamma taking into consideration that...
08 October 2023 9,421 6 View
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
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
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
I'm researching light sources and their UV emissions. I'm curious if a 50W, 7500K conventional LED lamp emits any UV light. I found that a 200W tungsten lamp can emit up to 1.5 mW/cm² at 350 nm....
31 July 2024 3,843 7 View
How can we calculate the percentage of configuration interaction (CI) in the UV output data of the Gaussian program? for example: Excited State 17: Singlet-A 5.1359 eV 241.41 nm...
28 July 2024 9,165 2 View
Hi, I need to prepare a standard curve of H2O2 to evaluate the primary products of oxidation. H2O2 I have is 35%. How do I prepare a stock of H2O2 10 microlitere. If s.o has experience, I would be...
26 July 2024 3,460 2 View
I was performing estimation of Total Soluble Sugar content in bacterial cultures by Anthrone method. Out of 9 samples, only one sample showed positive reading while others had a negative reading...
22 July 2024 9,576 4 View
i need to find ECC for 4-MIMO antenna using radiation pattern on CST
16 July 2024 7,291 1 View
Hi, I need to measure the real-time (or temporal intervals) thickness variation of a transparent material from dry to wet/humid conditions, however, I cannot use the following techniques: -...
08 July 2024 4,799 4 View
I'm attempting to simulate a crossed dipole antenna. For excitation, I've placed a lumped port along each dipole. However, the resulting radiation pattern is similar to that of a single dipole....
08 July 2024 1,876 3 View