Standard addition method for every sample?

Hi everyone! I'm trying to analyze vitamin C in several species of capsicum. Beside using different extraction methods and considering all the cares needed to protect Vit C from degradation I get...

04 May 2018 1,158 5 View

Aminoacid HPLC analysis is not reproducible?

Hello there!! I'm analyzing aminoacids by HPLC following the Agilent AAA column method (precolumn derivatization program). The problem is that the first run that I make it elutes quite good, with...

10 November 2017 5,731 0 View

A weird Ivermectin UV spetrum ?

Hi everybody. I was trying to analyse Ivermectin in a pharmaceutical product, but when I ran the standard it does not appear any peak (I'm using the USP 39 method for ivermectin). I tried to...

02 March 2017 128 4 View

Total phenolic compounds digestion by HPLC

Hello there! I'm trying to analyse phenolic compounds (phenolic acid and flavonoids) in quinoa seeds by HPLC but I'm having some problems with the hydrolisis of bounded compounds. I would like to...

01 January 1970 5,086 4 View

Could you recommend any books about Number Theory?

Beginner level books. High level books. Analytical Number Theory. Algebraic Number Theory. Combinatorical Number Theory. Books about partitions. Books about primes.

03 March 2021 7,174 5 View

What kind of intervention will be relevant to increase motivation among young sport trainees?

Any suggestion on what book to read is also welcome.

03 March 2021 1,646 4 View

I got 02 moderator values defining Johnson-Neyman significance regions. Is it an error?

Hi everyone, I am conducting research for my Master's thesis. I am using PROCESS by Johnson-Neyman to analyze my Moderator model. I test the relationship between Public Service Motivation and...

03 March 2021 2,350 2 View

How to access MSCI KLD Stats and Sustainalytics?

Hello all, I'm currently working on my undergraduate thesis and I'm having difficulties trying to access KLD Stats and Sustainalytics because my campus Airlangga University and apparently other...

02 March 2021 8,525 1 View

How the parameters (such as Mw, Chemical bonds, polymer bland and so on) affect the mechanic property of polymer (such as storage, loss modulus) ?

Anyone can recommend any books on such topics? Thanks in advance.

02 March 2021 8,457 2 View

I am interested in medicinal chemistry field, which books are highly recommended to learn from?

I am at the beginner level in drug design and drug discovery, and I am interested to learn more about this field. Which books are highly recommended to start from and gives me all essential...

02 March 2021 8,437 2 View

Please suggest a good text book for "Research Methodology in Life Sciences". Which book would be good for PhD Scholars?

Please provide Book Title and author name

02 March 2021 9,059 3 View

Which is a lucid standard comprehensive book to guide on psychological scale construction and its standardization?

02 March 2021 7,082 3 View

What element is driving the different slop in the low frequency tail?

My study consists simple corrosion inhibitors in salty brine. Right now I just fit my circuit with randles with CPE. Just wondering how the slop can given more info of the experiment. Or any...

01 March 2021 6,474 3 View

Genome-wide gene identification protocol ?

Is there any book chapter/book, webpage or research article available to understand genome-wide gene identification?

28 February 2021 8,095 1 View