Methodological confusions regarding deductive and inductive reasoning, hypothesis and theory test?

Hi Colleagues- What do you think about the following methodological issues: 1. Is it methodologically wrong to formulate quantitative research questionnaire based on inductive reasoning? 2. Is it...

21 February 2021 4,634 6 View

Are there alternatives to the Devarda alloy when estimating nitrogen?

Are there alternatives to the Devarda alloy when estimating nitrogen? devarda alloy is reducing the nitrate to ammonium

15 February 2021 8,838 3 View

Up to what extent website personalization can help in creating urge to buy impulsively?

Up to what extent website personalization can help in creating urge to buy impulsively? The digital transformation is making most of the organizations to go online and start doing business through...

09 February 2021 4,430 6 View

Observation instrument for classroom activity in consecutive interpreting?

Hello everybody My research involves an intervention where an instructor delivers a training course to students. My role as a researcher is to write down observations. Do you have any idea about...

03 February 2021 6,853 3 View

Can anyone help to convert ODK XLS into XML?

We want to conduct a verbal autopsy using WHO adult VA updated tools in ODK. The current version of WHO adult verbal autopsy tools is v1.5.3. I have successfully converted VA ODK-XLS v1.4 into XML...

03 February 2021 844 2 View

What are the applicable reinforcement learning based control methods for systems that have control delay?

I am studying the experimental application of reinforcement learning (RL) based control methods. For that reason, I modeled a nonlinear system without delay and trained the RL agent. In this...

02 February 2021 7,999 3 View

What is the best way to encode categorical variables in datasets with many features and avoid increasing dimensionality of the dataset?

I am working with a large dataset that has many categorical variables with many classes in each variable. I want to encode the categorical variables without increasing the dimensionality of the...

31 January 2021 6,986 3 View

How to get the insoluble fraction of PK digestion for mitochondria?

I am trying to check for some proteins if they are located in the inner or outer mitochondria membrane after treating the cells with a neurotoxin. I am using PK to digest the mitochondria, but I...

27 January 2021 5,145 2 View

May I know how to determine the acceptable intakes for new types of nitrosamine discovered in drug?

Currently only common nitrosaminse like NDMA and NDEA have mentioned the acceptable daily intake. Based on EMA guidance, should refer to ICH M7 chapter 7.5 guideline. I have read but could not...

20 January 2021 522 1 View

How can I produce Alpha-monopropionin and Alpha-monobutyrin in lab scale?

I understand that glycerol should be reacted with propaoiocic acid to produce monopropionin and with butyric acid to produce monobutyrin , if you can help with the reaction conditions based on 1...

13 January 2021 1,151 4 View

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23 February 2021 4,014 3 View

Is ANSYS Fluent good for simulation of a three phase reactor(stusy of its hydrodynamics or mass transfer...)?

Hello everybody, I would like to simulate a three phase reactor and study its hydrodynamics. I would like to know which type of software is better? I have a good command of ANSYS Fluent and I am...

10 February 2021 4,303 3 View

How can you attach polyurethane devices on glass slides?

I am making microfluidic devices made of polyurethane. The problem I am facing is that I am unable to attach these devices to glass slide even after plasma treatment (air plasma). Some of the...

28 January 2021 5,194 2 View

How do I dissolve a TPU (Texin RxT85A) in THF?

I want to make a 6% solution of Texin RxT85A in THF. I weighed the necessary amount of Texin resin and mixed at room temperature with THF with the help of a wooden stick, this did not work at all....

18 January 2021 9,080 3 View

Is there an alternative, more ecological solvent for shape memory polyurethane other than N, N-dimethylformamide (DMF) ?

As DMF creates problems for environmental aspects, we are looking for an alternative solvent for potential commercial end use applications of SMPU.

25 November 2020 8,728 3 View

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When producing a recombinant protein, harvested E. coli cells are normally refrigerated for 12-24 hours before homogenization to ensure protein inactivation due to foaming does not occur....

16 October 2020 7,373 0 View

How do you extract DNA from buccal swabs submerged in 70% ethanol using Qiagen DNeasy Blood and Tissue Kit?

Hi, I collected buccal swabs (cotton and foam) from nestlings and adult birds and stored the swabs in 70% ethanol. There are few different protocols on the web but I am wondering if anyone has a...

11 October 2020 6,103 3 View

What does over foaming correspond to in E.coli fed-batch fermentation?! How does foaming relate to cells metabolic status?

I'm currently experiencing overfoaming in my E.coli culture. My cells are used to produce a recombinant protein. The basic cell strain is BL-21 DE3. After changing my carbon source brand i am...

06 October 2020 3,946 3 View

What is the influence of the mold release agent on sound absorption properties of polyurethane foam ?

I'm an intern in a big company which makes flexible polyurehane foam for the automotive sector and I'm working on sound absorption properties of PU foam. I'm not chemist so I'm trying to improve...

23 September 2020 3,765 4 View

Which damage criteria should be used for nonlinear viscoelastic behavior?

Hello, I am building a material model for a nonlinear viscoelastic polymer in ABAQUS. For the beginning I just want to simulate an uniaxial tensile test. But now I want to know which damage...

13 September 2020 6,606 4 View