Why does silver nitrate turn brown upon addition of leaf extract but no increase in absorption at 400 - 500 nm?

I am currently biosynthesizing silver nanoparticles using ethanolic leaf extract. Upon addition of the leaf extract to 1mM silver nitrate, the solution turns brown in color after exposure to...

08 November 2020 1,009 6 View

How to present the results of a binary logistic regression for an ecological paper?

I conducted a binary logistic regression using the glm function in R. My binary predictor is the presence or absence of my study species. I have two significant variables but am just not sure what...

19 October 2020 5,398 3 View

What is the relationship between Imagination and emotion ?

It seems to me that this relationship is foregrounded in for example Japanese arts, but that the two are often uncoupled , for example in arts in the UK? I'm not restricting my field to the arts,...

13 January 2020 773 3 View

What is the relationship between creativity and democracy?

We have just started ReCreaDe a 3 year project investigating the ways that informal and nonformal learning can widen the scope for understanding the relationship between democracy, diversity and...

02 May 2019 3,162 7 View

How to cryopreserve tobacco BY-2 cells?

There is a protocol by Menges and Murray (2004) Plant J 37, 635-644, but the main description is for Arabidopsis cells, and I cannot make out the exact protocol used for the BY-2 cells. Does...

17 January 2019 6,651 3 View

Is anyone working with Fabry cell lines?

I am currently looking for laboratories or cell line repositories that are working or have worked with Fabry disease who are willing to provide me some transformed Fabry cell lines preferably...

03 August 2017 1,805 2 View

Can i find a short (<1000bp), strong and ubiquitous promoter for drosophila in vivo ?

Many of theses promoter i can find are very long (>2500bp; actin5c or tubulin) and i need some space on my plasmid. So, is it possible to find a smaller promoter ?

16 February 2017 4,447 1 View

Can anyone help me with a data set containing windows API calls for use in detecting malware?

25 October 2016 1,910 2 View

Does anyone have a good protocol for using H2DCFDA to measure ROS in adherent cells as macrophages?

I'm culturing adherent cells (5 x 10^5 peritoneal macrophages and bone marrow-derived macrophages), stimulating them with some drugs and a pro-inflammatory stimulus (LPS) for 24hours. I normally...

27 January 2016 733 4 View

What is the impact of crossover in clinical trials?

In oncology randomized controlled trials, offering patients the opportunity to cross over to treatment from the other arm at disease progression is a routine practice to address ethical issues...

25 January 2016 3,834 7 View

Why Austenite grains in steel show much more twinning than ferrite grains?

It is oftentimes said to be a distinctive metallographic trait that differentiates a fully austenitic and a fully felly ferritic steel without etching that might distinguish between two. Why...

02 March 2021 728 2 View

What are anisotropic electrical and optical properties of a semiconductor due to?

In some materials, properties such as band gap, thermal conductivity differ along different crystallographic axes. What are the basics?

01 March 2021 1,923 3 View

Energy minimization in LAMMPS using NVT ?

How do I do energy minimization in lammps with NVT ensemble ? I am using the following command and it does not seem to work. It stops at extremely high energy and gives me the error zero search...

01 March 2021 2,294 3 View

How can you bring two structures together to create an adhesive bond in LAMMPS?

I have created an Ice 1h crystalline structure and an Aluminium substrate structure and equilibrated both at 250K. Now I need to bring them together in a way that an adhesive bond is created....

01 March 2021 3,325 2 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

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

What is the most suitable server for predicting protein structures in bacteria?

I have used the i-Tasser several times, however it has been unavailable for several days. I tried the swiss-model, but the output was not very pleasant due to the model used. Is there any other...

28 February 2021 4,521 3 View

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25 February 2021 5,713 1 View

How to search for crystal structure for material with atomic position labelled?

I am using the crystallographic open database and materials project to search for cif file but the exact structure is not mentioned or how can I deduce that the given structure and atomic position...

23 February 2021 6,723 2 View

Why the CHi^2 is close to zero with a bad fitting but the Rp and Rwp are still high?

I am refining my XRD data using in FullProf program. The intensity of the modulated X-ray peaks is almost flat. I tried to adjust the peak intensities but unsuccessful. What is the reason? I guess...

23 February 2021 2,304 4 View