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

Separating Trimesoyl Chloride from Thionyl Chloride using Crystallisation OR Liquid Liquid Extraction?

Could somebody please suggest a solvent that dissolves either of the Thionyl Chloride or Trimesoyl Chloride to separate them using Liquid Liquid Extraction. Or we need a solvent to crystallise out...

07 December 2020 2,026 4 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

I am designing an UWB antenna..Please guide how to get wideband instead of multiband..?

By slotting patch and ground I am getting multiband not wideband.pls guide

09 November 2020 3,924 4 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

Which of the Covid-19 Vaccines would elicit the best immunoprotection and why?

I want to know which of the available Covid-19 Vaccines would elicit the best immunological response and why

02 March 2021 1,388 3 View

How vaccines of covid 19 work?

Millions ask how vaccines of covid 19 be successful and safe, its here to explain generally how vaccine of pfizer work ,mRNA vaccines teach our cells how to make a protein that will trigger an...

28 February 2021 2,723 4 View

Problem with shRNA transfection. Why are only two plates getting contaminated instead of all?

I transfected my LNCaP-WT cells with 3 shRNA plus their NTC two weeks ago and split two puromycin selected cell plates on Friday last week(Feb 26). I checked for GFP in the cells, and they all...

28 February 2021 4,949 3 View

Where can I find public datasets with Covid-19 patient information?

Hi, I'm looking for public datasets that have CT, X-ray information, or medical records for patients with Covid-19. Does anyone have suggestions?

28 February 2021 4,760 3 View

Is there any published or unpublished statistics on dropout rate (Dose1 to Dose-2) for Covid-19 vaccination in India, US, UK or any other country?

Are there any published or unpublished statistics or papers on the dropout rate (Dose1 to Dose-2) for Covid-19 vaccination in India, USA, UK, or any other country where vaccination has started at...

28 February 2021 4,237 1 View

If a given country passes mandatory 'vaccine passport rule' to go outdoors, otherwise stay at home, can it help to vaccinate all against COVID-19?

Wether vaccine passport declared not to go out of home without it may help taking COVID-19 vaccine. Can't it break individual's right to protect the community? Your comments on perspectives...

27 February 2021 5,549 23 View

How long do vaccines protect us against COVID 19?

Or will we have to get vaccinated every year, as in the case of influenza?

27 February 2021 1,048 5 View

How to compare 2 samples recruited with different sampling methods?

If I want to compare characteristics of 2 groups of patients, one group is recruited from a random sample of the general public while another group is from a sample with a fixed gender (male to...

26 February 2021 3,526 3 View

How to use measure capacitance change in COMSOL time dependent study ?

I want to measure change of capacitance due to relative displacement between two parallel plates in COMSOL. Distance between two plates changes with time. So I'm using a time dependent study but...

26 February 2021 8,567 3 View

What are the patterns of human behavior that lead to COVID-19 infections?

Does data from contact tracing help in establishing patterns of behavior and social interactions that lead to infections? There are cases here in the Philippines where patients have no travel...

25 February 2021 9,002 13 View