What are the reliable tools for soil pH and NPK testing?

I have found some tools which would be inserted to the soil, but I'm not sure about its accuracy. Can anybody suggest inexpensive, easy-to-use, accurate soil testing tools/kits?

30 September 2020 1,580 3 View

Are there available scales or questionnaires to measure change management?

Seeking to connect with authors who may want to share their scales or questionnaires to measure change management.

27 September 2020 374 6 View

Carbon content over 100 in a charcoal sample under treatment at 1200 C?

After elemental analysis of the samples, carbon content of the charcoal was 102 (several repetitions were made, but obtained the same values), the equipment was tested with other samples of wood...

02 September 2020 1,971 2 View

Google Earth Engine for Multitemporal analysis (Land Use Land Cover Change)?

Hello. I am reading about Google Earth Engine (GEE) and their applications for vegetation, landcover and agriculture mapping. I am analyzing an area of 20Mha to determine a multitemporal changes,...

01 May 2020 2,059 11 View

Can anyone share with me a detailed protocol for performing a Plaque Reduction Assay to test anti-viral activity?

I am working with a team looking into testing antiviral activity of naturally occurring substances. We have not decided on the specific protocols but I am leaning towards the plaque reduction...

18 April 2020 762 3 View

How to fix ions in a protein during MD visualization?

I performed a molecular dynamics in GROMACS 2019.2 of a protein with zinc fingers (50 amino acids). When I visualize it with Chimera the ions jump everywhere.

05 April 2020 9,401 7 View

How can I implement a script in Chimera?

I want to evaluate several structures, the distances between two atoms.

21 March 2020 8,486 3 View

Why is there no yellow formation? (Alpha Glucosidase inhibtion assay)?

I'm currently doing the assay for inhibition of glucosidase. 50 uL of extract and 50 uL of glucosidase were incubated for 15 mins at 37 C. Then, 50 uL of 4-nitrophenyl-a-D-glucopyranoside. It...

09 September 2019 1,160 3 View

How do you create a micelle instead of a liposome?

Hello, I trying to create a PEGylated liposome through the post-insertion method. This method uses pre-formed liposomes and incubates them with peptides conjugated on micelles to transfer the...

09 May 2019 4,619 3 View

What antibody is used for the E. histolytica amebiasis antibody test(blood)?

I am trying to see if I can test the serum of infected mice with this antibody

15 January 2019 8,257 6 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

How to analyze a particular region of my simulation box in GROMACS?

Hi, I am using GROMACS 5.1.4 to simulate water in contact with a surface. I am only interested to calculate some properties of water near the surface. Let's say at a distance of x nm from the...

03 March 2021 9,989 2 View

Is there any test to determine the cardiovascular risk of patients with obesity? from the perspective of obesity?

We found tests to determine cardiovascular risk taking into account lipid profile, blood pressure, age, history of diabetes, other laboratories. But when weight is involved, there is a paradox. I...

02 March 2021 6,036 1 View

What is the state of the drug inside solid lipid nanoparticles (SLNs)?

I am a little confuse with the mechanism of solid lipid nanoparticles (SLNs). The main point of encapsulating drugs into SLNs is because some drugs have low solubility in water. Therefore, SLNs...

01 March 2021 3,703 3 View

Dapi fluorescence protocol for colon cell lines ?

28 February 2021 2,534 2 View

How can I calculate the rdf of water molecules around 'Na' ions that are closest(adsorbed) to the nanoparticle(solute)?

Hi, I want to calculate the radial distribution function for water molecules around the Na+ ions adsorbed on the surface of a spherical nanoparticle using the gromacs trajectory dynamically? For...

28 February 2021 5,650 1 View

Can impedance of antenna be less than 50 ohms?

I am simulating helix antenna in hfss, right now, giving excitation with 50 ohms port. When I see the results of Z parameter (real). It shows lower than 50 ohms. Do not understand, if it can be...

27 February 2021 4,218 7 View

How can I assign a velocity along one direction to CO2 molecules in a molecular dynamics simulation using GROMACS?

Dear all, I am trying to perform a MD simulation about the interaction between CO2 and a polymer. I create my model, solvate it and perform the NVT and NPT equilibration. Now I am not able to...

26 February 2021 10,014 3 View

Which database would give me this list of chemical components?

Dear colleagues: I would like to know if anyone knows of a database that gives me the parameters pH, K, K, Mg, P, C, N, Zn, Cu, Ni and Cd of common foods. I find a lot of information of proteins,...

26 February 2021 5,525 3 View