How deep into the sediment do marine/riverine oligochaetes live?

I am working with intertidal muddy sediments. In one of my sites the sediment was extremely muddy (high % of silt), oxic layer was shallow, and there were a lot of oligochaetes. I would like to...

14 January 2021 7,269 4 View

How to estimate the standard deviation of the carbom emission of a company producing many different products?

I am aware of the portfolio theory in general but want to know of a journal or author especialized in this issue.

14 January 2021 7,566 2 View

Do you consider that rose bengal chloramphenicol agar is suitable to isolate and count fungus?

Someone knows about a specific law or regulation which mentions the use of the rose bengal chloramphenicol agar is suitable to isolate and count fungi. Perhaps, someone has done a research about...

07 January 2021 5,325 5 View

How does climate change affect birds (shorebirds)?

I m recently investigating the impact of climate change on shorebird population trends, I would like to know what is the impact of fluctuations in variables such as sea surface temperature, global...

10 November 2020 9,293 15 View

How to plot predictions from a cox model with interactions, in R?

29 October 2020 2,605 1 View

Is there a way to make Facio (GUI for FMO) work on Mac OS Catalina?

I am trying to use the FMO (Fragment Molecular Orbital) method which works to make large (thousands of atoms) molecules more palatable for ab initio computational quantum-chemical calculations on...

29 September 2020 4,896 2 View

Are you interesting in "Determination of the HSPs and the Hansen sphere radius with the aid of the solver add-in of Microsoft Excel?

I am pleaded to inform you the following communication of Springer Nature Dear Author, We are pleased to inform you that your article "Determination of the Hansen solubility parameters and...

17 March 2020 916 3 View

Flow cytometry multicolor panel builder software tool that scans all commercial antibody databases?

Does anyone know of a web app or software for designing polychromatic flow cytometric panels that's able to scan all commercially available primary conjugated flow cytometry antibodies (i.e. from...

13 December 2019 7,047 4 View

Which will be a suitable matrix for a graphene oxide characterization by MALDI-TOF?

Is it possible characterized graphene oxide by MALDI -TOF? If it is, which will be a suitable matrix for do it?.

07 November 2019 6,298 3 View

Different peak lengths in qRT-PCR melt curve?

Hi, we are performing qRT-PCR assays, we did a triplicate under the same conditions and run the melt curve analysis. We obtained a single peak, but the height was different. Anybody knows why...

09 October 2019 2,303 5 View

Waters 2707 HPLC autosampler problem?

I am using a 2707 waters HPLC device. When I try to inject a sample, it says missing plate or rack. I changed the needle and calibrated its position but I still get the same problem. I even get...

02 March 2021 1,408 1 View

Any research papers for extraction of nutrient deprivation on macroalgae? Analysed by HPLC-UV and GC/MS. Possibly from macroalgae genus Rhizoclonium?

I am doing my thesis on the nutrient deprivation on the macroalgae Rhizoclonium sp. I will be analysing the levels over a period of roughly 5 days by HPLC-UV and GC/MS. I will be using seawater as...

28 February 2021 6,477 1 View

Is anyone familiar with the cyclic compressive fatigue testing (BS EN 12697 - 25) ?

I would like to get more information on the cyclic compressive fatigue testing (BS EN 12697 - 25) which is typically done for bituminous material in pavement design. Any one can advise on the...

28 February 2021 2,004 3 View

Do you kow of any database containing data on retention time, log P and polarizability for a large number of molecules?

Hi, I am a chemistry undergraduate doing my dissertation project on HPLC. In my project, I need to predict the HPLC retention time of 20 aromatic molecules, the calibration set. To do this I will...

24 February 2021 2,602 1 View

Can we recognize signs of the "volatility clustering" property of a time series in its time domain plot?

My purpose is to recognize the volatility clustering property without statistical tests such as The Lagrange Multiplier (LM) test.

24 February 2021 4,150 3 View

Any easy method of analyzing vitamin D in foods by HPLC?

Looking for method of extracting and analyzing vitamin D in foods by HPLC

24 February 2021 7,524 7 View

What HPLC Marker(s) should be used to detect anthocyanins in a sample?

What HPLC Marker(s) or standard is used to detect and quantify anthocyanins such as Delphinidin, Cyanidin in a given sample of plant extract?

23 February 2021 1,832 4 View

How we can measure Kemp % in wool without using of benzene?

Would you please let me to know about the methods for measurement of medullation and Kemp % on animal? My problem is that the wool sampling and sending to laboratory is not possible. So I would...

21 February 2021 7,260 4 View

Which statistical test to use for comparison of different groups in a categorization?

I am doing a study on how programmers with different levels of expertise choose class names. A description was provided to the participants together with a list of possible class names for the...

21 February 2021 3,662 4 View

HPLC baseline failure (ACN/Water)?

My baseline increases without any explanation, it is only fixed by changing the solution B, will it be the column? Reagents? Bomb? Detector? Solution A: H3PO4 0.01% IN WATER Solution B: H3PO4...

21 February 2021 5,656 3 View