Where to buy washed river sand in the USA?

I'm planning an experiment for this upcoming summer and I'm in need of a good supplier of severely nutrient-impoverished river sand (washed) in the USA? Does anyone knows a company that sells this...

01 February 2019 4,475 5 View

Is it possible to perform linear regression with averaged data instead of individual data points?

08 September 2015 10,000 32 View

How to manage root fungus in hydroponics?

Does anyone who works with hydroponics ever faced the appearance of fungus in the roots??If so, how do you dealt with it? I tried to sterilize everything in 4% bleach, but it appears to come back...

04 May 2014 1,058 11 View

Is the cost-benefit model for the evolution of botanical carnivory the best explanation or just the only one available?

The cost-benefit model for the evolution of carnivory in plants, proposed by Thomas Givnish (1984), was experimentally tested only a few times and the results are quite contradictory. Certain...

03 April 2014 454 1 View

Is the Hotelling's T-squared test an adequate way of comparing the relative distances of certain points to the general curve in a linear regression?

I'm trying to determine the relative distance of certain points of my plant community to the general regression of the GLOPNET database (Wright) and I'm in doubt if the Hotelling's T-squared is an...

03 April 2013 1,954 5 View

How can I determine the chlorophyll content in plants? Does it take a lot of plant material to do so?

I need to know how to determine this compound but also need to know if such a measurement requires a lot of material (my entire object of study has about 0.080g)? Is there any kind of facility...

02 March 2013 589 28 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

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 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