What is the correct scientic reason for Anamalous Behavior of water from 4 deg C to 0 degC ?

Water gets solid at 4 degree C and again expands till it freezes at 0 deg C . Why this behavior ? Many make statement of Hydrogen Bonding and high density. But such is not case with other liquids...

31 December 2018 2,193 0 View

What is the conversion efficiency of a standard GaAS based solar cell ?

I intend to use solar cell for my work in an Agricultural Farm. conversion efficiency = input solar radiation on the solar panel of 1 sqm /output from the panel in electrical watts what best...

11 December 2018 8,000 0 View

What is the relation of surface velocity to overall discharge of water flow in an open channel flow including rivers in spate (floods)?

I had designed an Optical Current meter with my senior Guru and we measured surface velocity at many places including Ganga at Patna. This project has won award from CWC in 1983. This has never...

31 December 2013 4,109 11 View

What is the range of acoustic telemetry. Can this be used in wireless sensor networking instead of very high frequency transmitters?

It seems acoustic telemetry has low frequency than rf or microwave. This may not harm the crops in wsn for agriculture farms.

31 December 2013 2,230 1 View

Why does plastic fiber have high sensitivity in displacement measurements when LASER or LED is used in visible spectra?

This was seen when I did a project and demo for a student. The displacement is also larger, source was typically red LED ( at 660nm-approx)

31 December 2013 9,217 1 View

Spectrum anlyser and FFT analyser

What are the exact differences between these types of equipment and their applications

05 June 2011 1,565 1 View

hello i am interested in discussions

what is latest in adc

04 May 2010 9,185 1 View

Why does blocking with my immunogenic peptide cause nuclear fluorescence in ICC?

Hi all, I am validating a polyclonal antibody raised against human ANT4, through WB and ICC. In most of my controls, the antibody shows very little off-target binding, but when I pre-incubate the...

03 March 2021 5,999 3 View

Irradiation data for JAPAN?

Hi, Could you help me to get the latest (2019, 2020) solar resource data for a particular site in JAPAN? PV GIS and NSRDB data are not in reach to JAPAN, I'm looking for some other database for...

03 March 2021 961 3 View

SDS page software for analysis?

I did sds page to determine the difference in protein expression between 3 types of vaccine , but i don't have scanner or densitometer available. . so i wonder if there is a software to analyze...

02 March 2021 6,270 3 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

Does Napabucasin soluble in dichloromethane and in ethanol?

I need to prepare a solution of Napabucasin (inhibitor of cancer cell stemness) in dichloromethane. The drug is expensive, so maybe somebody already tried to do it. If it is soluble, what is the...

02 March 2021 9,945 3 View

Help request in CST microwave?

im working now on TPV solar cells and metamaterials and i realy need our help in CST microwave i have a tpv cell simulation and i want to extract particullarly the absorbtion of only the active...

02 March 2021 2,246 2 View

Anyone found any research papers on solar furnace design calculations (for solar concentration)?

I am thinking about working on solar furnace with heliostats that concentrate sunlight and heat molten salt, but currently no luck with research. Not a lot of papers based on the subject. (check...

01 March 2021 5,023 5 View

How to size battery banks?

I am designing a small grid connected solar PV power-plant. As the battery's capacity is specified in Ah and demand in kWh. What is the best way to size the battery bank? I have battery price in...

28 February 2021 1,638 3 View

Dapi fluorescence protocol for colon cell lines ?

28 February 2021 2,534 2 View

How to design a boost converter for a mppt controller?

I have a doubt on how to select the inductor and capacitor value when I want to implement MPPT controller. This is because we always take a maximum output voltage and current but in this case, we...

28 February 2021 3,637 2 View