How to perform Cox proportional hazard analysis or Kaplan-meier survival analysis in SPSS?

At first please see the attachment. This experiment was performed for a period of 7 days (n=100). After 7 days, we found different level of survival rate (%) for each treatment. Now, I want to...

15 February 2021 9,145 2 View

For acid treated montmorillonite clays what will be the result of surface area?

The organo montmorillonite nanoclays modified with octadecylamine were used for the experiment. After acid treatment, the surface area will be increase. However, in my experiment, the surface area...

10 February 2021 1,581 3 View

How to identify when a gaussian program is about terminate normally?

Dear all, I am trying to optimize a bimetallic complex using # opt=tight b3lyp/lanl2dz scf=qc geom=connectivity. The program is running for around 5 days but the size of the .chk remains same...

05 February 2021 8,721 3 View

Can I use 500ng of DNA for restriction digestion?

The recommended amount of DNA for restriction digestion is 1ug in a 50ul rx I've got around 500-600ng of DNA in a total volume of 35ul. Would I get satisfactory results with this amount of DNA for...

31 January 2021 729 6 View

What is the effectiveness of online teaching during COVID-19?

Please share your experience on the effectiveness or challenges on online teaching during Covid-19 lock down. Share your experience about challenges, technology, online learning platform,...

26 January 2021 4,532 37 View

LC-MS metabolomics data after annotation some have their compound name but no KEGG id or with KEGG id but no pathway. How to interprete?

Recently I have generated LC-MS metabolomics data. After annotation, some have their compound name but either no KEGG id or KEGG id but no pathway. How to interpret those compounds? Additionally,...

18 January 2021 1,938 3 View

Has there been any scholarly research done in schools that addresses teaching from a global citizenship perspective to deal with global problems?

The current global pandemic, the climate crisis, the destruction of the oceans (with plastics, etc), and massive numbers of refugees are part of a set of serious global problems. It is clear...

13 January 2021 2,022 3 View

How to remove a citation from list of research articles?

I want to remove a duplicate citation

01 January 2021 3,983 3 View

No executable file generates while building geant4 example code, where is the problem?

Hello, I am a newbie in geant4. I'm learning it playing with example. Sometimes, when I go to simulate an example code, it doesn't create an executable file (the green one in my ubuntu terminal)....

26 December 2020 9,482 3 View

How to get structure and topology for glycosaminoglycan (GAG) of arbitrary length?

Hello all, I want to do glycosaminoglycan (GAG) simulation in Gromacs. Initial structure and CHARMM topology for short chains can be obtained from Charmm GUI glycan modeler. But I have to take...

23 December 2020 6,092 2 View

What is the optimal method to prepare a controlled porosity osmotic pump (CPOP) tablet for scanning electron microscopy?

In order to assess the shape and size of pores formed by dissolving the pore former in the semipermeable membrane structure, SEM images are needed. Cellulose acetate was used in the coating...

15 February 2021 6,135 3 View

Can we measure porosity of a composite by DSC (heat flow measurements)?

In the DSC conducted for A and B (image provided). B is a derivative of A. Can I conclude that the porosity of composite B is more than A, Since the heat flow is decreasing with increase in...

26 December 2020 9,104 3 View

How to find porosity of a sintered ceramic compact ?

I want to know the porosity of my sintered ceramic composite ? Please help me out

21 December 2020 4,343 6 View

How to change porosity on Ansys Fluent?

12 December 2020 4,612 3 View

Rotation RPM of planetary ball mill?

Dear researchers we are using FRITSCH Pulverisette 6 - MONO planetary ball MILL. In the machine dashboard we can set the rotation rpm of milling. This rotation speed that we are setting is for...

17 November 2020 4,999 2 View

Are there any researchers who have compared dry and wet grinding results under laboratory conditions with Life Cycle Assessment?

Dear Researchers, I would like to compare the environmental load of dry and wet grinding under laboratory conditions (later with the scale-up method also for operating conditions). I have already...

31 October 2020 6,703 11 View

Effect of adsorbent porosity on efficiency of adsorbent recovery ?

Hi guys. Can anyone answer the following with citing the references? 1) Relationship between adsorbent porosity and adsorption/desorption rate? 2)Relationship between porosity and adsorbent...

31 October 2020 6,323 5 View

FTIR analysis for Immobilized enzyme on alginate beads?

Dear research community. I want to study FTIR spectra of Immobilized enzyme on alginate beads before and after biodegradation, do i need to grind the Immobilized enzyme on alginate beads for the...

26 October 2020 8,606 1 View

How to calculate bulk density, porosity, and void ratio of soil?

If the particle diameter is 2 mm and the particle density is 2.5 g/cm, what is the bulk density, porosity, and void ratio of this soil? I had known that the formula to calculate them. The...

11 October 2020 3,466 3 View

How to measure the volume of hydrogel?

08 October 2020 2,745 9 View