How to remove floc from drinking water?

Bottle drinking water contained many floc. What is the reason? This water produced from fully automated systems.

10 November 2018 9,656 16 View

What is the relationship between bacterial population size and growth speed?

02 March 2015 9,479 9 View

What is an alternative way to elute natural compounds without an ODS HPLC column?

I am trying to isolate active compounds from bacteria. I have used an ODS HPLC column but the active compound did not elute within this column. Can anybody give me any suggestions? My compound is...

02 March 2014 6,111 5 View

How I can isolate my compound close to the solvent's retention time (the solvents peak and compound peak are very close) through HPLC?

I am trying to isolate an active compound from an HP20 water flow fraction by HPLC. This compound is not bound in HP20 resin or an SPE (solid phase extraction cartridge). When I inject this sample...

02 March 2014 8,110 4 View

How can you separate a co-eluting more polar compound by HPLC?

I'm having a problem separating a single compound using 100% water as a mobile phase in HPLC (ODS). My compound is more polar and it is eluted within 3 minutes when I used 100% water as a mobile...

02 March 2014 200 7 View

Does anyone know an LH-20 protocol?

I used LH-20 resin for separation for small molecule from bacterial biomass. I used MeOH-water for eluting solvent. How I can equilibrate LH-20 resin before loading the sample onto the column?

09 October 2013 4,089 8 View

Why do bacterial extracts absorb moisture from the air after freeze drying?

I extracted an active fraction from bacterial biomass through some chromatography. To get totally water free sample, I applied this sample into freeze drying. This freeze drying sample when I open...

07 August 2013 1,893 3 View

Can somebody suggest to me, what is the original MS number in LC-MS?

I ran my sample in LC-MS and got only one peak. But in MS, it shows three MS numbers and also indicate, these 3 ms ions came from same peak. What is happening in this experiment? Please give me...

07 August 2013 6,948 19 View

Why is there an active compound everywhere in HPLC?

I am trying to separate my active compound through HPLC. When I injected my samples, I get more than 20 peaks and I was collected all peaks into 10 different fractions. After doing bioassay, I...

06 July 2013 8,901 1 View

Why don't active compound separate in pre-parative HPLC?

I am trying to separate my active compound through HPLC. When I injected my samples, I get more than 20 peaks and I was collected all peaks into 10 different fractions. After doing bioassay, I...

06 July 2013 2,979 7 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

How climate change will influences human and animal behavioral change?

The role of climate change influencing the human behavior as well as economics interest

01 June 2021 0 0 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 View

How to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence?

I am on the lookout for the Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence. Does anyone know where I can find it? Thank you in advance

03 March 2021 3,568 1 View

What kind of fluid could I use for a pitfall trap that also does not invalidate molecular testing?

Hi, I want to start testing pitfall trap to obtain ants samples, but I need to conduct molecular analysis on those insects. So, what kind of fluid can I use? Ethanol expires too early and I need...

03 March 2021 5,978 5 View