PEG coated Fe3O4 nanoparticles in aqueous NH3?

Hello, I synthesized PEG coated Fe3O4 nanoparticles by coprecipitation methods and I would like to ask whether they can be dispersed in aqueous NH3 since they have a PEG coating and theoretically...

06 February 2021 5,217 4 View

Is there such a function? Is it unique?

21 January 2021 8,962 13 View

What are the current developments in terms research and publications in anthropology in general and social anthropology in particular?

I am interested in examples of anthropological methods that have been applied across different disciplines, for exmple in mathematics education.

20 January 2021 3,090 3 View

How did the tests or exams get to Latin America, specifically the written tests?

I am looking for some bibliographic references that explain how tests or exams (measurement and assessment in education) came to Latin America, specifically written tests. I would like to know if...

13 January 2021 8,607 0 View

Is this true for all values c > 0?

25 December 2020 3,621 45 View

Can children from 1 year old to 15 years be given MODANA and Pfizer Anti-COVID-19 vaccine?

The clinical disease of COVID-19 has been low in children generally and vaccine has been develop.Any evidence of its safety,efficacy and risk for allergy in children? any exemption for children...

23 December 2020 7,177 12 View

Can large samples be stored at -20 degrees prior to RNA extraction?

As part of a Covid project we are sampling urban rodents and performing RNA extractions and serology work. We have too many samples to store at -80 and have opted to perform extractions the same...

15 December 2020 5,252 2 View

Substrate functionalization and antibody deposition for biosensor work?

Hello, I am a bio student working in a lab on his free time and I just started working with an engineering group on sensors. My questions are: 1)Functionalization steps and what are the best...

21 November 2020 7,996 2 View

Why am I seeing RED fluorescence in control non transgenic plants?

Hi experts, I have cloned the DsRED gene into a plant vector under 35S promoter and used it for direct seed transformation of Chenopodium quinoa. When I checked the potential transformed...

24 October 2020 4,775 3 View

Do you think there are any prospects for hydrogen as an alternative to natural gas when operating a gas turbine?

At the moment it is very expensive, the price of 1 kg of hydrogen is from $ 2-5. Are there any prospects for green hydrogen? or will we extract hydrogen from gas? what promising technologies can...

19 October 2020 1,954 7 View

How the parameters (such as Mw, Chemical bonds, polymer bland and so on) affect the mechanic property of polymer (such as storage, loss modulus) ?

Anyone can recommend any books on such topics? Thanks in advance.

02 March 2021 8,457 2 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

How optimize the Size Exclusion Chromatography?

Hello! I'll do a size exclusion chromatography, but I only have an open column, and I'll perform the peptide extraction from yeast, using buffer lysis (sodium phosphate 50 mM/NaCl 30 mM/DNAse and...

01 March 2021 2,215 2 View

Is anyone familiar with the cyclic compressive fatigue testing (BS EN 12697 - 25) ?

I would like to get more information on the cyclic compressive fatigue testing (BS EN 12697 - 25) which is typically done for bituminous material in pavement design. Any one can advise on the...

28 February 2021 2,004 3 View

For modelling epoxy-based matrices (in composites), which model in ABAQUS is the most suitable, Concrete damaged plasticity or Drucker-Prager model?

I am working on developing a micromechanical FE model for predicting kink-band formation in UD composites. To model matrix plasticity, which model, out of Concrete Damaged Plasticity and...

28 February 2021 5,415 1 View

Can we recognize signs of the "volatility clustering" property of a time series in its time domain plot?

My purpose is to recognize the volatility clustering property without statistical tests such as The Lagrange Multiplier (LM) test.

24 February 2021 4,150 3 View

How can I verify my centrifugal fan design for electric motor cooling?

I have radial blade centrifugal fan design which will be mounted on exhaust side of electric traction motor. The fan will be mounted on same motor shaft inside the housing. How can I verify that...

23 February 2021 2,390 3 View

How to dissolve cross-linked Amberlite IRC120 H, hydrogen form resin?

Hello all, I have used Amberlite IRC120 H, hydrogen form acidic cation-exchange resin for the ion-exchange of waterglass [sodium silicate solution -- 40% Sodium silicate (mol ratio > 3.2)...

21 February 2021 5,614 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

Which statistical test to use for comparison of different groups in a categorization?

I am doing a study on how programmers with different levels of expertise choose class names. A description was provided to the participants together with a list of possible class names for the...

21 February 2021 3,662 4 View