Darwin Reyes

13 Questions 25 Answers 0 Followers

Questions related from Darwin Reyes

How to differentiate strength of Target-DNA Aptamer interaction versus DNA Aptamer-Complementary DNA hybridization?

We will be developing competitive lateral flow aptasensors for a small molecule target. However, we are concerned about the strength of the DNA aptamer- target interaction versus the interaction...

03 March 2018 4,177 3 View

Why is that the zeta potential of purified gold nanoparticles is higher than the zeta potential of the unpurified gold nanoparticles?

I am doing an aptamer-based sensing of heavy metals and I will be using gold nanoparticles (AuNPs) as the optical label. Part of the preparation of the aptamer-AuNP recognition label is that the...

12 December 2017 8,560 4 View

Why is that absorbance ratio is considered in optimizing detection conditions of gold nanoparticles?

I am currently doing literature search on gold nanoparticles for my Masters' thesis. And all of the papers Ive read always considered absorbance ratio of gold nanoparticles in their optimization...

03 March 2017 5,765 4 View

Why is rubber prone to crosslinking?

Reason why rubber is prone to crosslinking?

11 November 2016 4,229 0 View

What are the possible applications of inorganic nanomaterials?

I've been looking at some papers regarding the synthesis and characterization of different inorganic materials and I am becoming interested with this topic.

02 February 2013 4,002 7 View

UV Visible spectra of salbutamol sulfate.

I have scanned a 5mg solution of salbutamol (as sulfate) in pH 7.4 PBS from 200nm - 400nm in order to obtain its absorption spectra. Based on the certificate of analysis, its maximum absorption is...

02 February 2013 5,887 22 View

Is pH 7.4 phosphate buffer saline more suitable to use than pH 7.4 phosphate (acid-conjugate base buffer system) in simulating physiological pH?

Which is more stable to degradation even in short periods of time?

01 January 2013 6,534 1 View

What is the best drying method to do in order to get low-moisture content alginate hydrogels?

Im only doing air-drying. Can you suggest other methods that will produce low-moisture content alginate hydrogel without altering the properties of the drug loaded inside the polymeric matrix.

01 January 2013 9,582 1 View

What does it mean when there is a large amount of moisture in drug-loaded calcium alginate microparticles?

Does it mean that the content of the polymer is mostly water? How about the drug? How can it be explained chemically?

01 January 2013 257 2 View

Why is that the calcium - alginate coordination called "egg-box" model?

I am currently doing an undergrad research which is about calcium alginate-based drug delivery systems...

01 January 2013 8,462 1 View

Do I need to heat the solution when preparing an alginate solution?

I am working on my undergrad research, which is about calcium alginate microparticles as drug delivery systems. I had a hard time preparing the solution because of the viscous nature of the...

12 December 2012 10,009 15 View

How can i explain the egg-box structure of the crosslinked polymer?

I will be crosslinking calcium with polyalginate

11 November 2012 8,901 3 View

What type of bonding happens between a polymer and a crosslinker during a ionotropic gelation technique?

I will be utilizing alginate as polymer and calcium lactate as crosslinker.

11 November 2012 1,422 2 View