In processing fish samples for GC MS and/or heavy metal analysis, is there any difference between granded oven dried samples and ashed samples?

What is the difference between granded oven dried fish samples and ashed fish samples in processing fish samples for chemical analysis?

04 February 2021 9,942 3 View

Help with multivariate test selection?

Hi all, I have a dataset containing 2 independent variables (1. Region [North, East, South and West] and 2. Year [2010, 2015, and 2020]) and 4 continuous dependent variables (e.g. height, etc.)....

26 January 2021 9,329 3 View

How to plot data, if in a pair of values (for a paired t-test / Wilcoxon test) one of the two values is missing?

I have a dataset with 100 paired values (pre- and post intervention X). In 20 couples 1 of the 2 values is missing. When I compare pre- to post-intervention values, those 2 couples / rows will be...

04 December 2020 3,044 9 View

Python ODE: how to get the solution of last timestep with solve_ivp?

Hello, to solve a system of ODEs, I set up a Python-code with solve_ivp as ODE-solver. The solver is calling a function, which generates my ODE-system. Inside my ODE-system, I need the previous...

07 May 2020 914 2 View

Is there not a common root of LBM and SPH modelling incompressible fluid flows?

Is there not a common root of Lattice Boltzmann Methods (LBM) and Smoothed-particle Hydrodynamics (SPH) modelling incompressible fluid flows? I see common grounds by means of a mesocopic...

30 December 2019 3,550 7 View

How to interpret cross-level interactions in multilevel models?

My thesis-partner and I examine context level and individual level predictors effect on populist right-wing voting (i.e., Danish People's Party in Denmark) applying a multilevel logistic...

11 December 2019 7,738 2 View

Is the measured area in an image with a bigger scale in Y than in X dependent of the orientation?

I have an image with a bigger scale in Y than in X. In this image I want to measure several areas. Now I need to know, if the true area is dependent of the orientation of the object / area I...

06 June 2018 9,891 5 View

Enhancing or prohibiting factors for the development of binationals' intercultural competence in servicescapes

17 May 2017 4,852 2 View

How do I calculate the adiabatic electron affinity of H3PO at MP2/6-311G++(dp) level?

07 November 2015 8,857 3 View

Forced-choice experiments with "don't know" options?

04 October 2015 5,247 2 View

Can anyone elaborate the method to measure arterial pulse wave velocity in research studies involving Sphygmocor??

Sphygmocor is the tonometry based instrument which is used to record generally radial pulse waves and then calculating various variables like Augmentation Index, SEVR etc. It is also used to...

02 February 2021 7,546 3 View

How to remove ORO (Oil red O) background precipitates?

Hi ORO experts, I'm struggling with ORO background precipitates in arterial tissues. The protocol I use works very well on human atherosclerotic plaques which are full of lipids and I don't...

13 January 2021 7,110 1 View

Has anyone seen this perivascular black stuff in rat brains?

This photo is from a reportedly healthy Long-Evans rat. Several of these animals have similar findings. No other sign of illness. Has anyone out there seen this?

19 November 2020 8,108 4 View

In online GC-FID/TCD connect to flow reactor, why I am getting instable peak area in FID in every injection under same conditions?

We have online GC-FID and GC-TCD (Mod: 2014) connected with flow reactor system. This GC-FID/TCD is connected to a gas line coming from flow reactor system which I used for cascade reaction. In...

11 November 2020 4,999 6 View

Is there variability in dorsal glow spots in Lamprohiza mulsantii also in thoracic segments ?

I decided to edit this question to show the right/ correct things and erase those clearly wrong in order to avoid confusion....

03 October 2020 5,889 3 View

How does a Bi-Static FMCW radar detect a Zero Doppler target?

27 September 2020 8,370 6 View

Is it mathematically possible for a duplicated signal to result in energy in higher order FFT bins?

02 September 2020 6,311 2 View

Zeeman Doppler Imaging - ZDI code/program (Stellar Surface Cartography)?

I'm currently looking for data analysis program to conduct the stellar cartography/doppler imaging. Kindly, anyone provide me the tool to extrapolate for my on-going research?

17 March 2020 4,295 2 View

What is this structure in the laparoscopic image?

This is an operative image during laparoscopic surgery for hiatal hernia. What is the structure in this image referred to it by an arrow? Is it thoracic duct or another structure?

15 February 2020 7,770 14 View

Can I get GC Column details for Nitrogen Testing?

Can someone provide me a GC Column Make / Dimension for estimating Nitrogen purity using Gas Chromatograph with TCD Detector. Thanks in advance.

10 February 2020 9,225 3 View