Structure of the residual covariance matrix in a model with multilevel within-subject factors?

Hello, I have a dataset with a three-level structure. Participants reported an outcome of interest for 3-4 aspects of an incident, and they reported 4 types of incidents (1 incident for each...

09 February 2021 4,280 3 View

Mental health of COVID-19 Patients?

We want to conduct a study on the mental health and psychological problems in COVID-19 patients and would measure it in terms of Anxiety by Beck Anxiety Inventory, Depression by Patient Health...

02 February 2021 6,401 6 View

Which are the appropriate solvents for n-hexane plant extract for in vivo animal models to avoid toxicity?n-hexane plant extract is not soluble?

My n hexane plant extract is not soluble in any solvent. I have tried water, normal saline, tween 20 (2%, 5%, 10%, 50%), tween 80 (2%, 5%, 10%, 50%), pure DMSO, ethanol (2%, 5%, 10%, 50%, 97%),...

16 January 2021 3,547 3 View

Two antennas at transmitter and receiver both. How to limit signals such that each antenna at receiver get signal from only one antenna?

If I have two antennas at transmitter called T1 and T2 and signals are simultaneously transmitted from both antennas at same frequency towards two antennas at the receiver called r1 and r2. Is it...

16 January 2021 4,765 3 View

How much Morphine Standard is dire need for determination and extraction of Morphine in HPLC technique?

I want to purchase some Morphine Standard for HPLC to detect Morphine rate in Papaver somniferum L. how much is need in every stage or phase?

08 January 2021 1,675 3 View

What are the pros and cons of the Non-orthogonal multiple access (NOMA) scheme on Future Communication Networks?

21 December 2020 9,650 3 View

How Can I convert OD550 (Optical Density at 550 nm) to NTU (Nephelometric Turbidity Unit)?

OD and NTU are two different units, that can be measured through a spectrophotometer and Bioreactor (integrated with turbidity sensor) respectively. Because of the difference in units, the results...

03 October 2020 5,662 2 View

Can COVID-19 trigger diabetes?

06 September 2020 3,017 19 View

Is it possible to get higher wear rate with lower coefficient of friction?

i working on the enhancement of wear resistance properties of coated stainless steal in the absence and presence of various lubricant. In experiments , in the presence of some lubricants, the...

06 September 2020 8,338 26 View

ANSYS FLUENT is only launching in parallel. Can somebody please help?

My fluent is not launching in series at all, even when I uncheck the parallel option and i also have no option for using series. Please help!!! Many thanks!

04 September 2020 4,199 4 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

Does the pressure(-600 mmHg) affects pH?

When I conducted the degassing experiment using decompression under anaerobic condition(and I used ferrous based chelating agent), the oxidized ferric were observerd. So, could you tell me the...

03 March 2021 4,892 5 View

Chlorinated organic formation in odor control scrubbers using hypochlorite?

I'm involved in a study of odor control technologies for municipal wastewater treatment plant. One of the control options involves a chemical 2-stage (acid/alkaline) packed bed scrubber. The...

03 March 2021 3,661 2 View

How the parameters (such as Mw, Chemical bonds, polymer bland and so on) affect the mechanic property of polymer (such as storage, loss modulus) ?

Anyone can recommend any books on such topics? Thanks in advance.

02 March 2021 8,457 2 View

Why almost every element would be metallized in sufficiently high pressure and low temperature?

(This statement is from wikipedia, BTW). What is so special about metallic bond that is limiting high-P low-T state of a matter (as long as individual atoms exist, not white dwarf of neutron star...

02 March 2021 3,309 2 View

How Relativistic effects is one reason for lanthanide contraction?

The Lanthanide contraction which is the decrease in ionic radii of the elements in the lanthanide series from atomic number 57, lanthanum, to 71, lutetium, is due to poor shielding of the 4f...

01 March 2021 2,272 4 View

Ester cleavage conditions?

Hi all, I need to cleave the ester in Ethyl 2-amino-1H-imidazole-5-carboxylate to make the carboxylic acid and retrieve the product from solution to use in downstream applications of linking to...

01 March 2021 8,766 3 View

LEDs on Vis Light photo degradation of MB water sol via N doped TiO2 in a mini flume?

Good day to all, I have no experience with light emitting diodes. I am building a glass mini flume to demonstrate the photo degradation of Methylene Blue in water running over self cleaning...

26 February 2021 4,026 5 View

How can we theoretically calculate Elemental analysis(percentage) of atoms in covalent organic framework?

For example in one research article the Elemental analysis values of COF-TpPa-1 ( Triformylphloroglucinol (Tp) (63 mg, 0.3 mmol), Paraphenylenediamine (Pa-1) (48 mg, 0.45 mmol) are as follows...

24 February 2021 1,265 6 View