Is there a classification scheme for rock cavities or caverns with respect to their size and shape?

The range of forms and sizes of cavities in rock is very big. Is there a classification scheme for rock cavities regarding their size and shape?

02 March 2021 4,511 3 View

Cloudy/high background western blot - can anyone help me?

Hi everyone! I try to detect VDR protein (~48 kDa) using Western Blot. After SDS-PAGE using 10% MP TGX Stain-Free Gel from BioRad I transferred the protein onto an metOH activated PVDF membrane...

23 February 2021 6,266 3 View

Which variables can be used to increase/decrease the grain size of czochralski-grown polycrystalline silicon?

Which variables (such as pull speed, melt temperature, annealing temperature/duration, cooling rate, etc.) affect the grain size of czochralski-grown polycrystalline silicon? In what direction...

10 January 2021 2,204 6 View

How do I justify the use of fish scales to synthesize a nano filter?

Good day. I am doing a studu on the use of fish scales to create a nano filter. This is aimed at potentially solving the face mask problem brought about the pandemic. This is what I know so...

09 January 2021 8,907 5 View

Calculating Intercoder Reliability for 3 coders with 7 categories across 6 texts?

How would you calculate inter-coder reliability (Kappa coefficient?) for the following scenario: 6 texts coded across 7 categories (codes) by 3 coders?

23 December 2020 2,324 3 View

No title

10 October 2020 3,407 2 View

Do you agree that one of the advantages of the Boundary Element Method is that it easily addresses Incompressible Materials (Poisson's Ratio = 0.50)?

When modeling incompressible materials via the Finite Element Method (FEM), typically the plane formulation that is displacement based fails when Poission's Ratio = 0.50, which is a standard...

08 October 2020 7,058 1 View

Recommended analysis for an ANCOVA-like problem with binary variables for dependent variable and covariate?

What is your recommended analysis for the following problem: I have 3 (treatment) groups and a non-randomized pre-post design. I want analyze the effects of the groups on the follow-up measure,...

28 September 2020 5,890 4 View

No title

18 August 2020 3,955 11 View

Are there any test methods for butterflies or other arthropod pollinator besides bees?

In the current EFSA Guidance on the risk assessment of plant protection products on bees (Apis mellifera, Bombus spp. and solitary bees) related to the Regulation (EC) 1107/2009 valid test methods...

26 March 2020 1,178 1 View

How do I dissolve cannabidiol (CBD) and crude hemp extracts in 1:1:18 ethanol:tween80:0.9% saline for IP injection in mice?

I have tried dissolving CBD and crude hemp extracts in 1:1:18 ethanol: tween80: 0.9% saline. I dissolved the drugs in ethanol first then tween, after 10 mins sonication the solutions looks ok but...

27 January 2021 6,259 3 View

Can anyone recommend a method of isolating terpenes (including sesquiterpenes) from dried hemp?

Can anyone recommend a method of isolating terpenes (including sesquiterpenes) from dried hemp? The idea is to separate the cannabinoids fraction from the terpenic fraction. We will use...

29 September 2020 1,267 3 View

What is a good "analyte-free" method blank to use in cannabis testing?

I am looking for a method blank which I can use in the heavy metals, terpene, solvents, cannabinoid, pesticide, and microbial analyses I do in my analytical lab on cannabis samples. I have tried...

18 August 2020 320 1 View

Is THC causing underlying paranoia in individuals?

In other words, is there a chemical impact caused by THC which could be activating neural correlates in the insular cortex (ic) of the brain? The increase in the sensory activating...

04 August 2020 967 4 View

How to improve my CBD to THC conversion method?

Hello Everyone, Let me preface this question by saying that this is all being done under a legal THC/Hemp license in the state of Colorado. I was hoping to get some advice on how to improve my...

27 April 2020 6,292 1 View

Do you think having 2nd and 3rd degree burns from electrocution could release THC from fat and falsely elevate a THC concentration?

Electrocution resulting in amputation of both legs. THC concentration 16 ng/mL 6 hrs after accident. Chronic every day smoker.

02 March 2020 1,752 1 View

Which is the best the detector in HPLC for test cananbinoids?

In the HPLC, we can use differents detector methods to quantify the cannabinoid content from the flowers of Cannabis sativa. Most populars detectors are: 1. UV 2. Diodo Array Detector 3. Mass...

19 September 2019 459 3 View

Which is the best the detector in HPLC for test cananbinoids?

In the HPLC, we can use differents detector methods to quantify the cannabinoid content from the flowers of Cannabis sativa. Most populars detectors are: 1. UV 2. Diodo Array Detector 3. Mass...

08 September 2019 9,808 2 View

Precipitation in cell culture medium?

07 August 2019 1,846 2 View

What is the best method to extract oil and CBD (cannabidiol) from leaf, flower and seed of hemp?

We have used chloroform for cleaning and for extraction of used N hexane. We have also tried absolute ethanol. But quality and purity of oil is not good. Kindly help me in this regard

05 May 2019 4,830 3 View