What statistical test to use in SPSS to investigate relationship between continuous variable and national mean for another variable?

I am exploring the readability of court decisions in 5 countries. I have a quantitative readability measure (continuous variable, my dependent variable) for each decision - about 50 decisions per...

08 February 2021 419 3 View

How are the degrees of freedom calculated for a bootstrapped Independent Samples t-test?

I am currently writing up findings for my masters dissertation and I have noticed that APA often require the t statistic, the p-value, degrees of freedom and sometimes the confidence intervals...

08 August 2020 5,367 3 View

What am I doing wrong in molar solution calulation?

I recently read: "The perovskite solution for the solvent quenching method (MAPI) recipe was prepared by dissolving 553.2 mg PbI2 and and 181.23 mg MAI in 1 ml anhydrous DMF/DMSO (4:1, v:v) to...

17 May 2020 9,876 7 View

What are the molecular determinants for formation of adducts in electrospray mass spectrometry?

Dear all, depending on the molecular structure of an analyte different adducts during the electrospray process are formed. Even when high (up to 5 mM) of ammonium salts are present in the LC...

13 May 2020 6,621 3 View

How to make a simple perovskite diode without HTL and ETL?

I am facing trouble in making a simple perovskite diode in order to study the deep level traps of the perovskite semiconductor layer. Since the properties of perovskite layer are needed to be...

20 January 2019 2,593 4 View

Are there any Cryopreservants/Cryoprotectants with no DMSO?

Hello there, I'd like to ask whether there are any cryoprotectants/cryopreservants medium with no DMSO in them. Specifically to use it for freezing tissue such as collagen scaffold. I have found...

12 November 2018 8,949 3 View

Does anyone titrate their secondary antibodies for intracellular flow?

Hey everyone, I'm working on creating a flow QC panel. I have a few sets of 3 intracellular and 3 surface markers that I know have worked well in the past for ICC and flow applications. My...

27 September 2018 6,166 1 View

My extracted RNA from cells has good A260/A280 purity but poor A260/230 purity. What can I do?

Hello All My Microbio Experts, I'm a total noobie in this field so go easy... I've extracted RNA from cells and the A280/A260 values look good (~2.0 for most samples) which means the RNA is...

31 July 2018 6,802 1 View

What's the best type of optical microscope for inorganic materials analysis (thin films, electrodes, etc.)?

I'm not familiar with microscope types, features etc. and our R&D group wants to purchase a new microscope to characterize our sensors, materials, etc. Can anyone recommend a good type or brand?...

29 July 2018 2,731 6 View

Are there any (non-pathogenic) microbial standards that can be used to spike into water samples to evaluate disinfection methods?

I would like to evaluate the relative efficacy of various disinfection methods such as UV lamps, ultra-filtration, etc. to remove microbes from water samples. I may need to spike microbial...

26 April 2018 3,992 4 View

What reaction will occur when adding hexamine into ammonium nitrate in an acidic medium?

Hello, I am investigating properties of water in oil emulsion explosives. And adding hexamine (hexamethylenetetramine) into one of the phases that are used to make the emulsion should increase the...

21 February 2021 8,680 1 View

How to Make a Pre-Emulsion of Methacrylic acid, Butyl Acrylate, and Acrylonitrile to use in emulsion polymerization ?

Any answer will be useful / Surfactants / Procedure I am using this pre-emulsion in sequential emulsion polymerization

14 January 2021 2,566 4 View

How to increase biomass oil viscosity?

24 December 2020 3,975 10 View

What kind of microscope should be used to investigate the stability of the Emulsion Liquid Membrane(W/O/W)?

I want to know what kind of microscope should I use to check the stability of dual emulsions (W/O/W)? upright or invert? Fluorescence or polarized or ordinary light? What field of vision should I...

12 November 2020 6,044 3 View

Can you suggest a sub-problem and possible objectives regarding to this thesis/research study?

03 November 2020 8,155 3 View

What is the best industrial emulsifier to make silicon oil in water emulsion?

I need to make long-lasting stable emulsions of 6 wt. % percent silicon oil in DI water. The previousely made emulsions using Tween and Span Emulsifiers did not remain stable after a week.

31 October 2020 3,568 3 View

Image database of vegetation quadrats?

I am trying to develop a web teaching module (thanks to COVID) on plant community ecology. I am searching some database of photographs from plant quadrats to let students experience the whole...

14 October 2020 8,156 1 View

DNA extraction from bacteria in Emulsion sample ?

Hello, I want to extract DNA from bacteria (E.Coli) in Emulsion sample and then to perform a qPCR. what is the best Kit for the extraction of DNA from such samples? Thank you

29 September 2020 1,825 3 View

Is there a good way to do insect bioinventories without capturing and killing insects?

Dear entomologist colleagues, just wanted to find out if any of you have ever conducted and published on insect bioinventories without collecting insects? Is it defensible to do catch, ID and...

29 September 2020 7,660 16 View

How to prepare nanoemulsion at home without a ultrasonic probe sonicator ?

I am trying to make a nano-emulsion to convert a cancer medicine into its more bioavailable form following guidance from this patent https://patents.google.com/patent/US9259391B2/en But I made...

17 September 2020 9,192 1 View