Coating glass with Heparin?

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What statistical test should I use to compare SDs in R?

I'm currently doing some analysis for my dissertation project and I was wondering what statistical test is best to perform. I have to compare the SDs of each participant (64 participants with 64...

07 February 2021 4,837 4 View

Any leads on open-source RI libraries?

Hi! Does anyone know any libraries where we can access retention index data (gas chromatography) of aroma compounds for free? Thanks!

07 December 2020 1,951 1 View

COVID-19, lockdown and the transition from physical to virtual online classes?

After COVID-19 outbreak was declared as pandemic, may countries including India face mounting pressure to close universities including my university, Sikkim University. After lockdown was imposed...

12 April 2020 3,781 19 View

How do you improve peak separation in this case (Please see attached picture) ?

How do I improve the peak shape and resolution in this region of the chromatogram? Analytes are volatiles in the headspace of rice. Column is DB-Wax-- a column reported to be successful in...

24 November 2019 7,250 3 View

Why are there broad, irregularly-shaped peaks that elute early in my gas chromatogram ?

We just replaced our GC-FID with a new column and conditioned the column before using it. When I started my running blanks and samples using a specific temperature program, there always appears...

13 November 2019 9,378 3 View

Why are there fewer peaks in a gas chromatogram with longer run times than with shorter run times?

Lengthening my GC run time from 14 min to 34 min resulted in fewer peaks. The target compound that I am trying to quantify is not detected whenever I run my samples (same extraction conditions)...

08 October 2019 7,512 6 View

Can non cancerous cells grow in 3D culture?

Can 3D culture be used to differentiate a cell population potentially containing both non cancerous and cancerous cells? If there is a population of cells growing derived from primary tumour...

17 October 2018 145 4 View

S. aureus Newman refuses to express mCherry protein?

Hello Everyone, Hope you are doing well. I have tried (twice) to use phage transduction to transfer a plasmid containing mCherry from S. aureus RN4220 to S. aureus Newman but on both...

03 May 2018 6,410 3 View

Can you do a framework analysis of qual data if using NVivo? It seems to be more geared up for other kinds of thematic analysis

I was planning to use a framework analysis approach for my data analysis but have transcribed in NVivo and will use NVivo as a tool within the analysis stage. I can't quite see how Framework could...

18 July 2017 7,616 3 View

TOA Reflectances greater than 1 in ENVI using the Radiometric Calibration tool

I am processing Landsat 8 scenes from DN to TOA reflectance using the Radiometric Calibration in ENVI 5.2.1. However, when I run Compute Statistics on the finished TOA product, I get values from...

02 July 2017 7,618 7 View

What thickness need for ITO to use as conductive layer?

I want to do RF sputtering of ITO on glass substrate using magnetron sputtering. what thickness do i need to make it good conductive layer to use it for PSC. Moreover, whats about thickness of...

01 March 2021 395 3 View

Adherance of Polyaniline coating over stainless steel?

Is the electropolymerisation of polyaniline coating over stainless steel (SS) via Cyclic voltammetry technique is really adherant? Else how to improve the adhesion of the coating, whether any...

01 March 2021 8,220 2 View

Glass fiber content in a gypsum board ?

Any idea on how to get the volumic ratio of glass fiber in a gypsum board ? Thank you for your help !

01 March 2021 2,501 3 View

Is there a method of determining feed digestibility without the need to re-pellet the feed?

I am aiming to determine the ADC values of a commercial fish feed, but I do not have a steam pelleter or extruder available to me. Ideally, the pellets could be coated with some inert marker....

28 February 2021 7,967 3 View

How to immerse bricks in wax ( for coating ) ?

Do we immerse the bricks horizontally or vertically ? #bricks#waterproofingsurface#civil#engeenering#chemicalengineering#wax#parafinwax

28 February 2021 6,685 2 View

For gelatin coating for culturing HUVEC.Should the gelatin be made in sterile water or PBS? Do I need to autoclave the gelatin soln after making it ?

I want to use 0.1% gelatin. Should that be made in PBS or sterile water? Should I autoclave the gelatin soln after making it in water/PBS?

28 February 2021 274 2 View

Concrete compressive strength databases?

I am looking for datasets similar to this one: http://archive.ics.uci.edu/ml/datasets/Concrete+Compressive+Strength I am looking for concretes with different types of aggregates (Recycled,...

27 February 2021 6,801 3 View

Why is my platinum counter electrode getting dirty during electrodeposition?

I am conducting anodic electrodeposition of MnO2 onto a stainless steel substrate, using a platinum strip as a counter electrode. This is done galvanostatically, with the current held between 5...

27 February 2021 1,829 3 View

What pH condition required to coat APTES on silica coated Fe3O4?

It's a hydrolysis reaction, which may produce by either acid or base-catalyzed reaction. so can anybody help me with this, which condition is suitable for this reaction?

26 February 2021 1,760 8 View

What is the best surface to culture cells isolated from a skin biopsy?

Hello, recently I am having some difficulties with maintaining the cell culture of primary cells isolated from a skin biopsy (normal and malignant). The coating of culture plates with Matrigel (a...

26 February 2021 6,151 2 View