Would you like to collaborate on a medical device regulatory book contracted through a reputable organization?

03 April 2015 8,554 8 View

Domo for decision-making?

I have seen several ads referring to DOMO as a better method for tracking data vs. Excel Spreadsheets because it has the capacity to inform decision-making. Has anyone seen a demo and/or used the...

06 July 2014 7,556 2 View

How can classificatory changes be made in an objective way based on a morphological cladistic/phylogenetic analysis?

Classifications often are based on rather (highly) subjective decisions. Once you have obtained a phylogenetic tree from a parsimony analysis, which ways allow objective decisions regarding...

16 June 2013 5,430 29 View

Does anyone know an efficient way of transforming a Mesquite matrix into an Excel spreadsheet?

I would like to add a data matrix of morphological data, assembled in the software Mesquite, to a manuscript. I would either add an electronic supplement (MS Excel format) or a table as *.txt or...

11 June 2013 4,028 2 View

What could be the potential drivers for the evolution of "extreme" sexual dimorphisms in isopods and other crustaceans?

Sexual dimorphisms can be strongly pronounced in some groups of deep-sea isopods, e.g. in Macrostylidae. In these, not only primary and secondary sexual organs are affected by sexual dimorphisms...

08 May 2013 4,334 7 View

Photoionisation cross section of (singly) excited Helium?

Hello, I am searching the photoionisation cross section of (singly) excited Helium (1s2s as well as 1s3s). I only find either neutral Helium or doubly excited Helium. If someone could provide...

17 November 2020 7,096 3 View

Why am I seeing a fluctuating GCMS baseline/ baseline noise?

I am working with a 7820A GC and 5977B MS. Recently, we changed the helium tank and since then we have been seeing baseline noise in the chromatogram which is high enough to interfere with my...

11 November 2020 6,520 2 View

Why is there an absence of peak/s in the NH3-TPD analysis of silica ?

The NH3-TPD of commercial silica (S.A= 223m2/g) has been run on a Micromeritics 2900 AutoChem II Chemisorption Analyser to determine total acidity. However, there was no peak observed post-run....

29 April 2020 2,174 3 View

What equipment and methods do you recommend for GCxGC analysis of petroleum samples?

I'm currently setting up GCxGC and developing methods for quantitative petroleum analysis using a Thermo Trace 1310 GC with an FID detector. Does anyone have suggestions regarding methods (column...

09 October 2019 5,801 2 View

How to run Aspen plus under 10K?

I wanna use supercritical helium (4.5K) as a coolant. But it is limited to run aspen plus under 10K. How can I improve it?

02 March 2019 9,199 3 View

How to remove trace amount of N2O from Helium?

08 February 2019 9,543 2 View

Geometric Structure of He-2-4 Nucleus And Accurate Calculation of Its Mass?

Like Crystal Molecules Having Geometric Structure. Atom Has It Too. Modern Physics can't give us a simple picture of the atoms. Please read my paper on He-2-4 to understand the Geometry of the...

01 February 2019 3,967 7 View

Any ideas about synthesizing liquid helium ?

i want to know how helium functions in superconductors

19 January 2019 3,615 1 View

How the oxidation of graphite takes place in side the nuclear reactor core?

Although, the reactor core is filled with He(helium). Is it possible to graphite is oxidized in long run of nuclear reactor.

20 September 2018 8,273 3 View

How the oxidation of graphite takes place in side the nuclear reactor core?

Although, the reactor core is filled with He(helium). Is it possible to graphite is oxidized in long run of nuclear reactor.

08 September 2018 6,247 3 View