How do you multiple impute item scores and perform a linear regression on factor scores?

I am developing a questionnaire and first performing an exploratory factor analysis. After I have the final factor structure, I plan on regressing the factor scores on some demographic covariates....

18 January 2021 883 8 View

How can I be sure that my bone marrow cells are differentiated into bone marrow derived macrophages (day 7) at a gene expression level?

Hi everyone, I'm trying to establish a standard protocol to cultivate BMDMs. I'm culturing BM cells for 7 days in 100mm petri dishes, addition of M-CSF(20ng/mL) on day 0 and day 3. I would like...

09 July 2020 1,742 3 View

Insects and COVID-19: a possible contaminant?

Dear colegues, What do you think about this? Can insects or others arthropods transmit the virus (directly or indirectly)?

19 April 2020 7,391 53 View

How can I identify and catalog the Rainforest fungus?

We have a big area of Rainforest where we can see a big variety of fungos growing around. I'd like to catalog them using a simple methodology. We do not have equipment for that despite a...

16 March 2020 9,034 3 View

I tried metawin unfortunately I couldn't get much help on how to code studies. Does anyone know a good free package for correlation meta analysis?

By the way I also need advice on which correlations to extract from factor studies ( exploratory, confirmatory, & SEM PLS) for meta analysis?

16 March 2020 7,217 3 View

Deep Euthetic Solvents, how to prepare?

Hi, everyone. I am starting to work with fractionation of Biomassa by Deep Euthetic Solvents . I came across a DES that is comprised of Lactic acid: Glucose:water (molar ratio 5:1:3), as in ref....

12 March 2020 3,474 3 View

Forests Pests: increased damage by climate change?

Dear researchers, what is your opinion about climate changes and forests pests? there is an increase or reduction of damage caused by insects and mites on trees?

29 February 2020 2,434 17 View

How to deal numerically with the discontinuities coming from a Butler-Volmer interface condition in a secondarry current distribution model??

Let us suppose that we want to compute the secondary current distribution of an electrolytic cell composed by anode, electrolyte and cathode. The governing equation in each subdomain isgiven by...

17 February 2020 7,913 3 View

How do I read the output files for a TDDFT (UV-Vis) job calculation (specially the graph itself)?

Hi everyone, so, I did some TDDFT calculations and have my .log files. I know I should be looking for the oscillator strength, the energies in eV and so on..., but my problem is this: How can I...

05 February 2020 7,783 3 View

Can one conduct a meta analysis on previous meta analyses?

When meta analyses on the same topic yield different results with no consensus, can one conduct a meta analysis on the Meta analytic studies?

19 December 2019 6,113 4 View

By which mechanism does potassium hyrdoxide works as an activator in the preparation of activated carbon?

Activated carbon is prepared from biomass using KOH as the activating agent. What is the possible reaction between KOH and the biomass?

14 February 2021 8,095 4 View

How does a pH 13 buffer solution containing NaOH/KCl work?

pH 13 Buffer solution is prepared from a strong base sodium hydroxide and potassium chloride salt. However a buffer contain a weak base or weak acid with their salts. What is the purpose of the...

26 January 2021 9,154 1 View

Does anyone know the pH-differential method?

I use the water method to extract the anthocyanidin from Peristrophe bivalvis (L.) Merr leave, then dilute 20 times with 0.025M potassium chloride, pH1.0 and 0.4M sodium acetate buffer, pH4.5...

20 January 2021 8,305 4 View

How we can isolated MnO2 from solid organic product ?

The compound 1,4-dihydro pyridine oxidized in the presence of potassium permanganate and microwave. After oxidation, the organic product and manganese dioxide are formed, and the two substances...

09 January 2021 5,358 4 View

What is the Role of temperature In Hummers method for the preparation of graphene oxide?

04 January 2021 5,033 2 View

Can one eat Muriate of Potash Fertilizer?

What is edibility safety of fertilizer-grade Muriate of potash? Muriate of Potash (MOP) is essentially KCl with often red rust from iron oxides. In order to balance excess Na and deficit K...

25 December 2020 6,179 6 View

Acesulfame Potassium and Acesulfame and Conversion?

Dear to whom it may concern, Based on ChemAxon, I calculated pKa values of Acesulfame as follows: 1. pKa (Strongest Acidic): 3.02 2. pKa (Strongest Basic): -6 Because I would like to convert...

25 November 2020 4,577 3 View

Potassium formate/water or potassium formate+LiBr/Water are not available in the commercial sector for absorption refrigeration systems?

Although there are already studies in the literature but not much , the use of potassium formate/water or potassium formate+LiBr/Water are not available in the commercial sector for absorption...

16 November 2020 2,917 2 View

Separation of chloride ions in solution ?

The fluorination was reacted in a carbonate solvent. The by-products were potassium chloride, sodium chloride or lithium chloride. The by-products were removed by filtration. However, it is still...

29 October 2020 2,670 3 View

Buffer solution 13 is prepared from a strong base sodium hydroxide and potassium chloride salt ..???

Buffer solution 13 is prepared from a strong base sodium hydroxide and potassium chloride salt .. While the definition of buffer is contain from weak base or weak acid with their salts .. So why...

03 September 2020 7,802 7 View