Does soft algniate hydrogel influence calcium concentration of a solution (cell culture medium)?

05 January 2021 6,066 4 View

Why does a magnetic mirror acting on ballistic electrons not violate the 2nd law of thermodynamics?

Magnetic mirrors are well known in plasma physics. In order to work, the mean free path of the charge carriers has to be at least as long as the helical paths under the influence of the B field....

24 October 2020 8,124 3 View

Collagen Type I Hydrogel dissociates/degradates/desintegrates in culture with cells. Where am I going wrong?

Hi all, I am having trouble with collagen type I as a scaffold for cells. I have a 3mg/mL collagen I solution with pH = 2. I am neutralizing with 1 M NaOH to pH ~7, then mixing with ice cold...

22 October 2020 8,429 3 View

Where can I obtain Streptomyces lividans strains for enzyme production?

I am having trouble figuring out where to obtain Streptomyces lividans strains that are commonly used for enzyme production. Specifically I am searching for the following strains: S. lividans...

25 May 2020 6,205 3 View

Do you think that eventually it is going to be possible to unify the electric and the gravitational force?

03 February 2020 7,152 18 View

Magnetic monopole pairs generated by photon/photon collisions?

The transformation of two "colliding" photons into a pair of particle / anti-particle was experimentally observed already. But the observed particles are always electrically charged. 1. If such a...

30 July 2019 1,569 18 View

Concentration of TCEP for RNA Isolation?

Hi all, in our lab we would like to switch from Mercaptoethanol to TCEP as a reducing agent for RNA protection during isolation. What concentration do you use? I only found a protocoll from...

01 March 2017 4,234 2 View

Does PDMS cure when it is in contact to water?

I want to seal a tissue/glass interface. The tissue should not be out of the water (buffer) for too long, so I am wondering if I could apply PDMS in liquid form and let it cure under water?...

17 October 2016 3,563 7 View

Which optical E-field sensor would you recommend for time-domain measurements?

For some years, optical E-field sensors (plus remote units) are commercially available; main advantage: the field is much less disturbed than by electrically conductive sensors. We would like to...

21 April 2016 3,688 5 View

Should we use 5-pt or 7-pt Likert scales? Any impact on significance?

Hello everyone A student of mine recently asked if it matters for significance testing whether a 5-pt or a 7-pt Likert scale is used. That is, are effects more likely to become statistically...

13 April 2015 5,188 9 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 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