Does dilution affect the metal concentration (ppm) in Atomic absorption spectroscopy analysis?

Analysis conducted using AAS to determine the presence of tungstate within the sample. The tungstate concentration of the sample was around 1100 ppm but after diluting 2 ml of sample to 5 ml, and...

26 January 2021 6,242 4 View

What is the best method for determining micropores surface area of coal-based activated carbon?

There are several methods like the DR and t method that calculates the surface area of the micropores. which one gives the value of this surface with high accuracy?

01 January 2021 3,228 4 View

Do the exams for students in electronic education have the same credibility in terms of measuring and evaluating learning as traditional education?

Educators around the world face a new challenge of how to conduct exams to assess what students have learned after the shift towards e-learning following the closure of nearly all universities...

21 September 2020 4,180 15 View

What Features Should an Online Exam System Include?

ith the development of Internet technology, online examination has become more Polar because it helps people save a great deal of energy and time. As an effective and efficient method of teaching...

21 September 2020 2,814 12 View

How can I create pre- and post-holiday dummy variables in EViews or Stata?

I have daily closing values of multiple stock indices and i have lists of public holidays for the whole period. I want to inspect the existence of a holiday effect. My regression equation is as...

23 May 2020 5,456 12 View

What is the difference between machine learning and deep learning?

I'd like to find a simple way to understand the deep learning vs machine learning

22 May 2018 542 8 View

Which is the best sample(s) to assay markers of oxidative stress in children?

I want to do assay for markers of oxidaive stress in different diseases in pediatric age group. Which of these samples is the best (serum, plasma, tissue fluid, RBC's)

06 November 2017 941 2 View

What's the methods that used to drive normal cancer cells to become resistance by using certain drug?

I'm working in subject related to undestand the mechanisms resistance of cancer cell to drug. For example: Melanoma to Vemurafenib

25 October 2017 8,069 2 View

Do you think that educational curricula should be developed to be a mixture of traditional and electronic education?

Based on the interruption of the educational process in many universities and schools around the world due to the Corona pandemic, do you think that educational curricula should be developed to be...

01 January 1970 6,434 82 View

Buffer Exchange using column packed with sephadex G-25 effect on protein concentration?

Hello, If i am doing a buffer exchange for an antibody of 1mg/mL, does the elution lose protein in the process of buffer exchange? For example, if i flow through 500 uL of 1mg/mL sample, and...

03 March 2021 6,299 3 View

No title

03 March 2021 5,360 2 View

New Journal, "Integrative Psychological and Behavioral Science" -- do you not know, and have you not seen, this done before?

Question to you and THEM, the New Journal, "Integrative Psychological and Behavioral Science" -- do you not know, and have you not seen, this done before? There appears to be a core problem for...

02 March 2021 3,024 2 View

Which is a lucid standard comprehensive book to guide on psychological scale construction and its standardization?

02 March 2021 7,082 3 View

How to define and get results (stresses) for certain points of a model in abaqus, using python? When the size of the model changes?

I want to do a parameter study of a aixsymmetric cylinder in Abaqus. I want to create several jobs where I get the stresses for 3 different points in my model. These points are defined. I wrote a...

01 March 2021 10,078 1 View

What is the procedure to determine the permeability of concrete?

can anyone help me in this, it will help me with my research work

01 March 2021 834 3 View

LOAD DISPLACEMENT CURVES Stiffness increasing in ANSYS non linear analysis. HOW CAN I CORRECT IT?

Hi. I am doing non linear FE analysis using a new material beam under flexural 2 point loading using ANSYS. I have defined a bilinear material model. The solution has converged. In results I am...

01 March 2021 9,911 3 View

Joint behaviour in Abaqus is not captured well?

I am working on roof joint and trying to simulate the behaviour in Abaqus. I am successful in running the model but the final graph does not follow the experimental curve in the negative direction...

01 March 2021 6,661 3 View

Which one is easier and better at modeling slender masonry structures? ANSYS or ABAQUS?

I need to model masonry and reinforced concrete minarets for my MSc thesis. Which one is easier and better at modeling slender masonry structures? ANSYS or ABAQUS? (Or any other program for just...

01 March 2021 736 3 View

How to assign different material properties to each element in Abaqus ?

Hello, I am writing a python script to generate my model and write the input file. The problem is I have 1000 elements in my mesh and I want to assign different material properties to each...

01 March 2021 9,511 3 View