How to include time-varying variables in linear regression analyses?

I need to perform a linear regression analysis in SPSS where: -the predictor is a continuous variable representing the SD of changes over time. -the outcome is a continuous variable measured at...

28 July 2019 5,749 6 View

Can anyone help me with detecting DNA bands on polyacrylamide gel electrophoresis?

I am using the following protocol for making TBE 10x: TBE 10X : 4 cc acrylamide: 8 cc APS: 600 microliter TEMED: 40 microliter voltage: 200w for 4 hours I have applied the same formula for a...

26 February 2018 6,445 2 View

Can anyone suggest a paper or research related to economics of organic sweetpotato (batat)?

I am doing some research in sweet-potato or batat organic production here in Serbia. Any opinion about this production, or paper or research considering this production?

06 July 2015 8,119 0 View

Does anyone have experience with Multiple Regression?

19 August 2014 1,863 5 View

What's the difference of the beginning of tRNA and other tRNAs in Pro., Eu, and Mitochondria?

I want to know about structural characters. For example, the first nucleotide in the 5' site of beginning tRNA have a link (connection) that is necessary for formylation. Can you help me find out...

15 May 2013 2,918 1 View

Dear Dr. Abdel Salam. Salam. Are you eager to have common students?

Dear Dr. Abdel Salam. Salam. Your article is very interesting titeled: "MILK PASTEURIZATION USING SOLAR CONCENTRATOR WITH TRACKING DEVICE . Which Journal has published it? I' Simin Hagh Nazari...

01 January 1970 6,213 3 View

How to separate water from glycerol solvent in a solvent recovery vacuum distillation column?

I am currently doing my third year design project. I have been assigned to design a glycerol recovery column in vinyl acetate monomer production. The process unit before the recovery column is an...

01 March 2021 9,525 4 View

What is the state of the drug inside solid lipid nanoparticles (SLNs)?

I am a little confuse with the mechanism of solid lipid nanoparticles (SLNs). The main point of encapsulating drugs into SLNs is because some drugs have low solubility in water. Therefore, SLNs...

01 March 2021 3,703 3 View

Why is the sum of the elements in a row in a Q matrix equal to zero?

When explaining substitution models, the substitutions are expressed as Q matrix. Why is the sum of the elements in a row zero?

28 February 2021 3,864 3 View

Where to find data on trees in tropical agroforestry?

Hi, I'm looking for data (mainly related to management: growth rate, canopy size, soil and climate preferences, etc.) about tropical trees used in tropical agroforestry. Have you ever heard about...

28 February 2021 7,356 8 View

Does different dilution factors affect negatively on NH3 reading ?

I have a sample of treated water sample & asked to obtain ammonia conc. in sample using a machine with 5-25 ppm detection range. However, upon testing with different dilution factors, all...

27 February 2021 8,483 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

Hello house, is it necessary to compute Content Validity Ratio (CVR) for an adapted questionnaire pls?

What should one do if he obtains conflicting results between Content Validity Index (CVI) and CVR for items in a quetionnare. For example based on the CVI obtained the items are acceptable but the...

25 February 2021 7,325 2 View

To date, according to health authorities, 30% of the population's diseases are initiated by drinking water pollution. Do you know this problem?

The main studies are as follows: * regular and timely receipt of information about the state of the environment using automated systems (stationary and mobile); * operational analysis of the...

23 February 2021 912 5 View

Multinomial probabilities and confidence intervals - obtaining the CI of the reference category?

Hi, Some background to my question: I have fitted 1st order multinomial Markov models with covariates. Since all probabiilties (for each row of the transition matrix) sum to 1, I estimate only...

22 February 2021 2,541 4 View

What are some underexplored theories and concepts in Activated Carbon as A Water Filter?

Hi, me and my team mates are currently planning to pursue the topic of Activated Carbon from Coconut as a Water Filter. And we would like to ask for your suggestions and knowledge on what specific...

22 February 2021 6,569 3 View