How to compute the distance in km between two points inside the Earth?

Hello everyone. I am looking for a simple formula to compute the distance in Km between two points inside the Earth. I do not mean the usual problem between to cities (distance along the surface)...

02 February 2021 3,455 4 View

How can I quantify background noise in a bioacoustic file?

I am using Audacity to analyse the presence of birds and frogs recorded with a SM4 recorder (Wildlife Acoustic). Background noise (rainfall, wind) is an important variable to consider that can...

28 January 2021 2,989 3 View

How can I project 3D objects on 2D images??

Hello! From 3D images stacks I have recovered some objects. Now I need to project those objects on 2D for further analysis. Any idea, any software, plugin, etc?

21 January 2020 4,144 4 View

Does anybody knows if there is a metodology of acute ethanol toxicity for neuroprotection studies that uses functional foods?

I recently read an article regarding the use of melatonin as a neuroprotective agent using acute ethanol exposure for 1 day and it had good results, I want to know if exists an article using...

03 January 2020 9,709 2 View

Is there a way to normalize my western blot bands since i loaded equal volume of seminal plasma (not based on protein concentration)?

I loaded 10ul of raw seminal plasma sample + 10 ul Bolt LDS buffer +4ul Bolt reducing reagent. I did the transfer using iBlot2 dry transfer system and used One Pierce ECL protein detection kit....

06 May 2019 6,912 3 View

Is there an acceptance criteria or limit for swelling index/behavior for sustained release matrix tablets?

I am doing a project on Matrix Tablets using natural products as binders (release retardant polymer) and I came across Swelling Behavior/Index. Is this necessary? I know swelling is vital for gel...

03 December 2017 8,272 2 View

I have two solution: Solution A and Solution B. I will mix the two. Which wavelength should I use for UV-Vis Spectroscopy?

I have two solution: Solution A and Solution B. I will mix the two. Which wavelength should I use for UV-Vis Spectroscopy? Solution A is pink while Solution B is green in color. If I will mix the...

16 October 2017 6,761 3 View

In identifying microorganisms using BLAST search, what is the purpose of converting the reverse sequences to reverse complement?

I have a 27F and 1492 R primers. And I wonder why the R primers should be converted to its reverse complement.

03 August 2017 6,530 2 View

Why I have low reproducibility in my real time pcr?

Hello , I'm quantifying bacteria by real- time PCR . I use plasmids with the target sequence as standards. The reproducibility is not good, one time i have 95% of efficiency and the next day is...

18 July 2016 4,605 7 View

How I can know the degree of crosslinking of a polymer?

Is it known that there is a variation in the degree of crosslinking varying synthesis parameters, but that technique I can use to know this degree?

28 April 2015 3,119 6 View

Where can I find life cycle inventory or assessment of non woven materials?

Dear network, I am looking for the LCA or LCI or at least the energy balances of the non woven fabrics process for my master project, in specific for natural fibers, yet I have found...

02 March 2021 9,662 1 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

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

How relevant is Mini slump cone?

for all the rheology researchers, my question is, how relevant is a mini slump cone (smaller than a standard 50 cent rheometer). currently based on testing, the thickness of slumped material is...

26 February 2021 3,668 1 View

Stress/strain tensors decomposition ???

25 February 2021 6,760 1 View

How to reduce residual stresses in MD simulation?

I am working on a preparation of representative polymeric structures of some popular polymers, such as polyimide or PTFE for MD simulation, during which a single nitrogen or oxygen atom will be...

24 February 2021 8,105 3 View

Suggestions for occupational stress surveys?

I am currently writing a masters thesis on reasons for occupational stress in the early childhood classroom, and want to include a short survey assessing participants work-related stress levels. I...

24 February 2021 8,678 2 View

Can anyone help me how to get the similar bands in Actin?

I run western blot on HCT-116 cell lines, I got actin band like in the attached picture. The band size is not same. Can anyone help me explain this situation and how to overcome? Thank you your...

22 February 2021 6,937 3 View

How we can measure Kemp % in wool without using of benzene?

Would you please let me to know about the methods for measurement of medullation and Kemp % on animal? My problem is that the wool sampling and sending to laboratory is not possible. So I would...

21 February 2021 7,260 4 View

The most suitable method to calculate the stress intensity factor in the presence of contact between the crack lips?

I'm trying to study cracked structures under a compressive load taking into account contact between the crack lips. I would like to know if the method of extrapolation by displacement remains...

21 February 2021 8,694 4 View