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

Why do we shift fermi to zero in electronic band structures?

In most electronic structures the fermi level is always shifted to zero , why ?

26 April 2020 163 1 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

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

How climate change will influences human and animal behavioral change?

The role of climate change influencing the human behavior as well as economics interest

01 June 2021 0 0 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 View

Does the pressure(-600 mmHg) affects pH?

When I conducted the degassing experiment using decompression under anaerobic condition(and I used ferrous based chelating agent), the oxidized ferric were observerd. So, could you tell me the...

03 March 2021 4,892 5 View

Why can't make aluminum nitride film successfully by use sputter?

We use reactive sputtering process to make aluminum nitride film, and want to make c-axis aluminum nitride film on a silicon substrate, but the crystal orientation cannot be seen with...

03 March 2021 7,975 3 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View