What pH condition required to coat APTES on silica coated Fe3O4?

It's a hydrolysis reaction, which may produce by either acid or base-catalyzed reaction. so can anybody help me with this, which condition is suitable for this reaction?

26 February 2021 1,760 8 View

What condition required for coating of Fe3O4@SiO2 by using APTES?

I tried coating Fe3O4@ SiO2 by using APTES in 5% water-ethanol but it is not coated. Kindly suggest a solution for it. Thanks

24 February 2021 5,992 4 View

How to Control Whiteflies in coconut leaves?

24 February 2021 1,005 1 View

Is it possible to design digital all pass filter for specific frequency range of the system?

I would like to know, Is it possible to design digital all pass filter for specific frequency range of the system to alter the phase of the system in that specific range of frequency? If yes how...

26 November 2020 1,402 5 View

In some CP patch design the polarization changes for LHCP to RHCP, What should be the possible reasons?

I have designed a dual print dual cp antenna, identical patch on both side of the substrate (placed side by side), on analysis, it is found it is showing LHCP in one band and RHCP in another band....

04 August 2020 5,136 3 View

In dual band antenna why the gain in upper band decreases?

In some printed antenna designs, generally, the gain in the upper band is larger than the lower band. However, in some cases (in my design having printed circle on both side of the substrate like...

03 August 2020 5,802 5 View

How to cap the maximum amount of reinforcement addition to make a polymer to be thermally conductive?

Addition of reinforcement with very high thermal conductivity (ex. graphene) would enhance the thermal conductive value of the developed polymer composites. How would one cap the maximum weight...

21 June 2020 9,303 11 View

We are facing rotten problem in kesar mango near mouth of it. What may be reason for that?

We are doing natural farming of kesar mango. This year we are facing rotten problem in mango near mouth of it. Last year it seems good. For this reason we are facing problem in selling if it....

02 June 2020 5,277 7 View

In COVID-19 modeling estimates for India by CDDEP, Johns Hopkins, and Princeton, what decideds peaking and decay?

COVID-19 modeling estimates for India have been presented by a team of researchers affiliated with CDDEP, Johns Hopkins, and Princeton. The results described in...

28 March 2020 1,623 2 View

Up to what temperatures can nCovid-19, novel corona virus survive?

The question does not require much explanation. Interested to know if there is some study on overall pattern of temperature range of permanent inactivity of various viruses and bacteria of all...

10 March 2020 8,749 44 View

Arena simulation - how do i model the following model in ARENA (see description) (new to ARENA)?

Hello, I'm fairly new to ARENA and I have the following problem: I have two queues in which, in each queue, a different order type arrives (both having an arrival rate of exponential 10). Order...

02 March 2021 2,431 3 View

Which is the most convenient manufacturing software for Additive Manufacturing?

Which tools can be used to generate machine codes for additive manufacturing?

02 March 2021 7,220 2 View

No title

Does anyone have the experience of using Taq Man probes in the QIAGEN Rotar- Gene qPCR machine?

01 March 2021 5,311 1 View

Does different dilution factors affect negatively on NH3 reading ?

I have a sample of treated water sample & asked to obtain ammonia conc. in sample using a machine with 5-25 ppm detection range. However, upon testing with different dilution factors, all...

27 February 2021 8,483 3 View

How to measure angle between laser travel path and machine axis in Laser Measurement system?

25 February 2021 1,987 3 View

How to delaminate copper in water-based anodes?

Hello everyone, I'm looking for a way to delaminate copper current collector of water-based anodes in Li-ion batteries without damaging the graphite film. I tried different materials such as HNO3...

24 February 2021 3,785 3 View

How can we add reinforced thermoplastics with granules in injection molding machine?

I need to make an injection molding machine in which short fibers are to be introduced. Short fiber length and material properties are to be determined and also the material strength are to be...

22 February 2021 4,290 1 View

Why is my qPCR suddently not working?

I've been working with qPCR for some months now. I amplify 2 genes (PSEN2 and HN1), and the protocols are optimized for both and have been working fine. The other day I amplified HN1 for some...

21 February 2021 3,437 3 View

Drop weight impact testing machine for composites?

Dear all, I hope everyone is safe and healthy I do have a question please. Where can I find a drop-weight impact testing machine to test fiber reinforced polymer composite plates (CFRP and GFRP)...

17 February 2021 3,820 3 View

Does anyone know if the Quantstudio 3 qPCR machine requires a passive reference when Using SYBR? I ran a qPCR and got the plot in the attached file.?

I know that my target is in my sample as I extracted it from cell culture myself. These plots show some amplification. The first one seems O.K for the first 36 cycles but then collapses at the...

14 February 2021 2,809 2 View