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

Any advice on selecting human or animal studies to conduct a systematic review?

Human studies are more relevant to the project, however there are more mouse studies because it is mostly carried on neuron progenitor cells to identify the effect of a virus in the development of...

11 January 2021 5,628 3 View

Any papers discussing the effect of Zika virus on neuron development and its effects on neuronal functions?

I am looking into this research, any interesting papers relating to this would be amazing. Papers on pregnant women and infants would be great. Thank you :)

30 December 2020 1,962 3 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

How to find natural frequency of a bridge from vehicle induced vibrations?

i have frequencies of bridge that are effected by mass of vehicle. the problem is when any vehicle pass the bridge it would add the its mass to the bridge mass ultimately mass of the bridge will...

22 February 2021 10,004 3 View

How to overcome convergence issues in concrete arch models?

Hi, I have modelled a three-span arch bridge with soil fill over along with pedestals. The FE modelling is done in LUSAS with HX8M solid elements (i.e. 3D solid modelling). The non-linearity is...

20 February 2021 1,346 2 View

How do I connect DAB DC DC Converter to a battery in matlab simulation ?

I am trying to model a DAB converter and I need to observe the power transfeered to the load side on varying the phase shift between two bridges, hence I couldnt take a constant load e.g...

09 February 2021 6,489 3 View

What happens in the salt bridge of Hg/HgO electrode?

My Hg/HgO electrode was used for EIS test in 4M NaOH solution. I found something in the salt bridge. After that, my EIS results found the noise at a low frequency (tested in a faraday cage)....

16 January 2021 1,900 1 View

Does anyone know about vision-guided control of civil structures?

I would like to know more about the following issues: 1. Using images as feedback for the closed-loop control of civil structures 2. Simulating the vision-guided control on the computer without...

03 January 2021 7,566 1 View

I have a challenge with a structure I optimized it's weight but the frequency constraint is not satisfied?

I know that frequency depends on material properties, geometry, support conditions and in plane loading. I have played around with these figures except that I maintained the same material steel...

26 December 2020 4,877 9 View

Why is shell element preferred over solid element in ANSYS APDL for bridge modeling in finite elements?

For modeling bridge deck slab on ANSYS APDL, why is shell element preferred over solid element? I read somewhere that the mesh of shell elements is more efficient than solid elements. Why is that?

02 December 2020 8,222 3 View

How to reduce (which reducing agent) a disulfide bridge in a protein and how long does it remain reduced?

I want to reduce the disulfide bridge in my 7kDa protein. My protein has only 1 cysteine at the surface and thus makes a homodimer using a disulfide bridge. I want to reduce the disulfide bridge...

24 November 2020 3,211 5 View

What is the type of connection between elements on ANSYS APDL after I merge their nodes together?

For the bridge shown below, the web is connected to both flanges, and the slab is connected to the parapet by meshing and merging the nodes, but what is the name of this connection? is it...

22 November 2020 2,288 5 View

How can I get the axial stress for an inclined beam188 element on ANSYS APDL?

I modeled a bridge on ANSYS APDL and added cross bracings / diaphragms as shown below. The diaphragms are not straight along the x or y or z direction, they are inclides BEAM188 elements. how can...

14 November 2020 8,172 3 View