How to modify Al2O3 surface to make it hydrophobic?

Dear Scientists, I am going to disperse Al2O3 with synthetic oil (hydrophobic). Therefore how to modify Al2O3's surface to it stable in the lubricant? thank you very much. Best regards, Agus.

25 August 2020 4,485 3 View

How to determine atom% from weight% as shown in Maud Crystallographic Software ?

My understanding is atom% can be obtained from weight% by dividing all latter values by the appropriate atomic weights and normalizing their sum to unity. However, I am having a difficulty in...

17 June 2020 5,309 5 View

How to preserve shrimp hemolymph?

Can anyone suggest how to preserve shrimp hemolymph sample during transport to laboratory from a remote shrimp farm? How to prevent hemolymph to clot between individual extractions in a pooled...

01 February 2018 5,287 1 View

Why DNA plasmid have to dry after wash by ethanol??

09 September 2017 7,373 4 View

Nitrification vs mineral concentration

Is nitrification directly affected by major minerals (Ca, Mg, K, Na) concentration in water? Does the nitrifying bacteria need these minerals significantly?

09 August 2017 2,095 3 View

Why should I use a reversed column for better peak in HPLC?

27 March 2015 8,813 3 View

How can I determine the stability of biosurfactant based on the emulsion activity test?

I have done a test of emulsion activity (and surface tension) to characterize the biosurfactant produced by bacteria. The emulsion activity reduced after 24 hours, but no more than 10%. How can I...

08 August 2014 9,155 9 View

Co-Immunoprecipitation problem - Can anyone lend their expertise?

I want to purify a protein complex with co-IP kit (Thermo-Pierce, resin column), but, at the end, I could neither elute enough specific protein nor visualise by WB using antibody against...

03 August 2014 6,377 6 View

Determination of Ginkgolide A and B using HPLC

Can anyone suggest a suitable solvent system in HPLC (using column of Licrhospher 100 RP-18 5um, Merck, Darmstadt, Germany) to determine Ginkgolide A and B ?

28 November 2012 4,169 18 View

Can you explain how to develop a good questionnaire?

A questionnaire is an instrument usually used in survey research. How to make a good questionnaire so that it can provide us the best results (valid, reliable) to our study?

12 September 2012 3,699 1 View

How to increase a model accuracy ?

dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...

03 March 2021 6,994 5 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

Is there a powerful system for the security of the systems distributed on IoT systems?

Is there a powerful system for the security of the systems distributed on IoT systems?

02 March 2021 3,858 10 View

Where can I find life cycle inventory or assessment of non woven materials?

Dear network, I am looking for the LCA or LCI or at least the energy balances of the non woven fabrics process for my master project, in specific for natural fibers, yet I have found...

02 March 2021 9,662 1 View

I am interested in medicinal chemistry field, which books are highly recommended to learn from?

I am at the beginner level in drug design and drug discovery, and I am interested to learn more about this field. Which books are highly recommended to start from and gives me all essential...

02 March 2021 8,437 2 View

How Relativistic effects is one reason for lanthanide contraction?

The Lanthanide contraction which is the decrease in ionic radii of the elements in the lanthanide series from atomic number 57, lanthanum, to 71, lutetium, is due to poor shielding of the 4f...

01 March 2021 2,272 4 View

For modelling epoxy-based matrices (in composites), which model in ABAQUS is the most suitable, Concrete damaged plasticity or Drucker-Prager model?

I am working on developing a micromechanical FE model for predicting kink-band formation in UD composites. To model matrix plasticity, which model, out of Concrete Damaged Plasticity and...

28 February 2021 5,415 1 View

Necessary tube lenght to cool Natural gas in a dry-ice cooling bath?

I have a tank which contains natural gas at 250 Bar and 293 Kelvin. I want to cool the gas in a dry-ice cooling bath to about 195 Kelvin. The gas will flow in a copper-tube through the bath with a...

27 February 2021 8,128 1 View

Exit velocity of natural gas from pressurized tank?

Hi Guys. I'm a mechanical engineer and have a bit trouble, would be very glad if you could help me with my questions. I have a pressurized tank which contains Natural Gas at 200 Bar and 293...

26 February 2021 6,253 3 View

Can anyone share his experience regards Smoothing in origin?

I am working on TiO2 composite material and the results of XRD have a lot of small/junk peaks and while I apply a smooth filter in Origin then the other characteristics peaks disappear so anyone...

26 February 2021 8,183 3 View