Level 1 pre-post multilevel regression: Panel data or ANOVA approach?

Dear colleagues, I am currently teaching myself in multilevel analysis using educational data. I found few to zero literature on basic analysis methods. In my context we frequently use level-1...

17 February 2021 9,378 5 View

Reliable and Valid Instrument for Causes of Medical Errors?

Is there any questionnaire/survey that measures the causes of medical errors? Example: physician negligence vs. systemic issues. Looking for a reliable and validated instrument. Thank you!

15 February 2021 2,874 4 View

Should the AUC in a concentration-time graph of a subcutaneous implant be roughly the same for poeple?

I have 2 concentration time curves of a subcut drug implant. the first group has a peak around the 50 day mark where as the second group does not. Both groups received the same implant by the same...

10 February 2021 2,305 3 View

Software for flow cytometry-like gating of data sets?

I am currently trying to do image based cytometry from fluorescence microscopy images. From the images I extract data such as cell size and a number of fluorescence intensities. Is there any...

09 February 2021 6,278 1 View

Can A. thaliana splice algae genes?

24 January 2021 329 2 View

Does long term preservation (10years) of Collembola in 99% Ethanol affect recovery rate of extraction by flotation?

Hello! I am currently developing an automated counting approach using Fiji to count Collembola from pitfall trapped samples that have been stored in Ethanol (99%) since 2010. I use flotation (tap...

13 January 2021 659 2 View

Co-stain Lectin PNA FITC conjugate with an uncojugated primary antibody?

Hello, I am planning to stain retinal tissue sections for IHC and want to co-stain cones and rods. For this we plan on using a Lectin PNA From Arachis hypogaea (peanut), FITC Conjugate for cones...

12 January 2021 583 1 View

How to use Abaqus USDFLD subroutine to vary stiffness?

Hi I have a problem where I am trying to vary the stiffness spatially across a structured interface. The whole idea is to vary the stiffness vertically, with a bulk stiffness of 8GPa decreasing...

06 January 2021 262 3 View

I really need help with cov-2 pseudotyped lentivirus production. Support?

Hi, i'm desesperate. i'm trying to produce lentivirus usinf BEI resources kit NR-52948. 24 hours after transfection i detect a massive GFP expression in my 293T cells. After 72 hours i filtered...

30 December 2020 9,889 6 View

How can i estimate the total phenolic content from a plant extract?

Suggestions and recommendations are welcome. A protocol used and experience would also be helpful.

25 December 2020 9,807 4 View

How different is whole rock Lu-Hf isotope systematics from in-situ zircon Lu-Hf isotope systematics?

I am currently working on a manuscript using some U-Pb zircon data and whole rock Lu-Hf data of granitic rocks from southeastern Ghana. However, I'm facing some difficulty working with the whole...

13 May 2020 4,054 1 View

How to create a POSCAR of nanoparticle for vasp calculation?

I want to run the phase transition of zircon with nano size. Anyone has a idea for creating the POSCAR file for a nanoparticle ? attachement is the .CIF file for zircon.

09 October 2019 5,705 5 View

What are oldest U-Pb ages reported from Ladakh and E Karakoram?

The Kohistan island arc and Ladakh island arc in NW Himalayan region are commonly considered as one island arc that has been separated into two segments due to uplift of the Nanga Parbat-Haramosh...

07 August 2019 1,442 3 View

Does sodic metasomatism have effect on zircon composition and concentric zoning in peralkaline granites? How can I describe the CL image?

The zircon grains I got from my peralkaline granites are irregular and stubby with 1:1 predominant aspect ratio from length 60 - 130 um and width 45 - 80 um to give a sub-angular outline...

28 April 2019 8,152 8 View

Does sodic metasomatism have effect on zircon composition and concentric zoning in peralkaline granites? How can I describe the CL image?

The zircon grains I got from my peralkaline granites are irregular and stubby with 1:1 predominant aspect ratio from length 60 - 130 um and width 45 - 80 um to give a sub-angular outline...

03 April 2019 8,327 9 View

What is a feasible way to synthesis zirconate by using zirconium oxide powders?

synthesis of zirconate, zirconium oxide

03 April 2018 1,907 3 View

How common are U-Th-rich magmatic overgrowths of zircon in granites and related rock types?

I'm interested in identifying examples of high-U and/or Th overgrowths of zircon of magmatic origin. Apart from metamictisation, what features/textures/chemistry are associated with this style of...

31 December 2017 7,587 6 View

How can I add new species/components in CEA nasa?

I want to perform equilibrium calculations between CO2 and Lithium Zirconate. I am not finding Lithium Zirconate in thermodynamic library of CEA nasa.

10 November 2017 7,669 1 View

What are some materials in chemistry that have yet to be tried in packing columns for chromatography or are a challenge to pack?

08 September 2017 4,912 0 View

Why do we use combined Lu-Hf and U-Pb isotope systamatic in zircon in unraveling the records of crustal evolution?

31 December 2016 1,321 2 View