Can a compound has two emission peaks with one excitation wavelength?

Greetings, I do some research regarding molecule structure embed with triazole moiety, there is two emission peaks observed in flurorescence. How could these observation happened from triazole ?...

09 October 2018 3,563 7 View

How pH can be a good indicator to self aggregation or phase transition?

Good morning to those who reading this question. I would like to have any references about aggregation of surfactant by triggering the conditions of system using pH. Besides, how pH can help to...

08 September 2018 7,399 3 View

How to choose whether single or double beam mode in UV-VIS?

Hi, I am using Cary 60 UV Vis, and at the setup in the instrument, it has option to use single or double beam mode. May I know which one is better? And how to operate for each beam mode? For...

01 February 2018 3,553 3 View

In mixture of anionic and nonionic surfactant, what effect of pH can happen to the mixture ?

If I have a mixture of anionic and non-ionic surfactants that will mix together, what are pros and cons if I change the pH of concentration at high pH (pH 12) compared to slightly low pH (maybe...

31 December 2017 7,703 3 View

Choosing a buffer solution?

02 March 2017 2,225 2 View

Buffer solution: Borate buffer vs Phosphate buffer

Greetings... I wanna ask about preparing buffer solution. What is the difference if I use phosphate buffer instead of borate buffer or vice versa? Can anyone explain in term of advantages /...

11 December 2016 5,587 2 View

Binary Logistic Generalized Linear Mixed model in SPSS. Is it doable?

I want to analyses the proportion of swimming sperm of three species of fish in two salinities. To analyse the proportion of swimming sperm in a Generalized Linear Model, I would use a Binary...

03 March 2021 2,297 3 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

Arena simulation - how do i model the following model in ARENA (see description) (new to ARENA)?

Hello, I'm fairly new to ARENA and I have the following problem: I have two queues in which, in each queue, a different order type arrives (both having an arrival rate of exponential 10). Order...

02 March 2021 2,431 3 View

What analysis to choose with a large neste dataset and clearly skewed or kurtotic distributions?

Hello! I have a dataset of n=3000 nested within 8 countries with approximately 200 or 400 responses in each country. I originally planned to perform multilevel modelling with 4 dependent variables...

02 March 2021 6,865 1 View

Can polymer concentrations be calculated based on the number average molecular weight?

Hello, I spin-cast two different polymers onto wafers and measure their height as a function of initial concentration. For polymer A, I have the weight-average molecular weight (Mw) as well as...

28 February 2021 7,882 2 View

What is Flat Lens Antenna?

28 February 2021 5,433 3 View

How the wettability of rock sample can be changed by ageing in pure hydrocarbon oils only?

I want to do wettability analysis of hydrocarbon oil (octane)/rock/surfactant solution system. but to do the analysis first I have to make rock surface oil-wet. Since hydrocarbon oil does not have...

27 February 2021 5,383 3 View

Can impedance of antenna be less than 50 ohms?

I am simulating helix antenna in hfss, right now, giving excitation with 50 ohms port. When I see the results of Z parameter (real). It shows lower than 50 ohms. Do not understand, if it can be...

27 February 2021 4,218 7 View

What are the application of Fixed points thoery in Chemistry.?

It is said that fixed point theory has lot of applications not in the field of mathematics only but also in various areas. So I am looking for applications in Chemistry only..

26 February 2021 3,533 1 View

How to interpolate from a time-series database ?

Hi, I am having trouble with a problem, in the field of Optimal Control and the generation of optimal time-series. Let's consider a system, whose dynamics are represented by dx/dt =...

24 February 2021 9,105 2 View