Review and cite MASS protocol, troubleshooting and other methodology information | Contact experts in MASS to get answers
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Questions related to Mass
Currently, the mass calibration and peak data in the peaktable have been done. However, the PTR-viewer still doesn't provide the final concentration. Thank you!
24 September 2021 7,894 3 View
If a black hole swallows an object of mass "m" and the initial mass of the black hole being "M", then does the total mass of black hole be = M + m? Will the Schwarzschild radius change accordingly?
18 September 2021 2,027 17 View
I have got mass and single crystal data for Pd(II)triphenyl phosphine complex. But I am still getting a peak at -4 ppm in the 31P NMR. I have given enough hexane wash to remove excess PPh3.
16 September 2021 2,817 4 View
I mainly want to know why it is that when the fuel mass fraction is above the stoichiometric mass fraction. The content is shown in the attached figure.
01 September 2021 2,785 2 View
Actually I am using an enzyme for first time and it has activity of 1,70,000 U per ml. I have prepared slurry of 200ml volume and want to hydrolyse using this enzyme. Literature reports usage of...
31 August 2021 7,573 2 View
The Mass Conserving Level Set (MCLS) is used for modeling the dynamics of multi-phase flows. The algorithm is used to study the hybrid phase between two fluids at two different phases. Would...
28 August 2021 9,148 2 View
We are using a GC with ISQ 7000 Mass Spectrometer. Today we did an air and water check and it was higher than usual, so we just tightened the ferrules. In the last two days, however, the N2 and O2...
16 August 2021 6,765 8 View
How many g of NH4H2PO4 are required to react with 1 g of Ca(OH)2 to produce Ca10(PO4)6(OH)2 (Ca/P=1.667) according to the equation 10Ca (OH)2 + 6H3PO4 -> Ca10(PO4)6(OH)2+8H2O
10 August 2021 6,886 2 View
hello everyone, i'm trying to model a 3D one story buiding with mass IIrregularity, the model has 4 elastic columns and rigid diaphragm. the model has no beam, so i used rigid diaphragm to equal...
09 August 2021 9,071 5 View
Bearman, et al. (1987) in his paper: EXPERIMENTS ON FLOW-INDUCED VIBRATION OF A SQUARE-SECTION CYLINDER, outlines his method of calculating Effective Mass as follows: "The effective mass of the...
08 August 2021 1,940 2 View
while studying the longitudinal momentum distribution for any halo nuclei during a reaction in lab frame .I want to change this distribution into the center of mass(CM) frame .is it possible...
25 July 2021 4,753 5 View
I am working on phase change material. I have confused about deciding on the mass of phase change material (PCM) in a 2D simulation when converted 3D experimental problem into a 2D CFD...
24 July 2021 638 4 View
For supercapacitors, we get symmetric triangular charge discharge curves with linear slope. Hence the formula C=I*t/m*V can be used. But for pseudo capacitors the charge discharge curves are no...
22 July 2021 1,065 4 View
I have conducted submersion testing in 3.5wt% of NaCl of various different metals in combination. One such metal I used in combination was extruded aluminum 6063 T6 with cold worked zinc plated...
19 July 2021 8,497 4 View
It has been suggested by my platform that I normalise my mass spec metabolite data by median. Is this necessary, and what is the purpose of this type of normalisation in the context of mass spec....
18 July 2021 8,925 3 View
Looking for an easy/efficient way to internally calibrate mass spectra.
14 July 2021 9,970 2 View
multiple interrupted stitches? single mass plication stitch?
08 July 2021 619 2 View
When I analyze peptides in MALDI TOF sometimes I observe exactly the mass in the first peak of the isotopic envelope (not M+H). Is it correct? For example: my peptide has 2111.20 g/mol and M+H is...
08 July 2021 8,225 2 View
Hello I would like to measure the antioxidant activity of two pure compounds A and B (of plant origin), then I will make a comparison between the two the formula I used to calculate the mass in...
05 July 2021 9,221 2 View
Hello! I use Q Exactive mostly for intact mass analysis and peptide mapping of proteins in a range of 20-150 kDa and the software is Xcalibur. During instrumental set up, I want to start using...
02 July 2021 1,547 3 View
By using Mass spec to know the type of proteins present on the leaves of Ramie
30 June 2021 4,699 1 View
Mass spec, protein abundance, NSAF
24 June 2021 6,633 1 View
I have a freshly synthesized formyl-CoA but not sure if it really is. Some published articles introduce that they used ToF Mass spectroscopy. But as a matter of money and time, for me it will be...
24 June 2021 8,872 1 View
Dear all, I want to clean cylindrical pipe with a steel brush that I have attached in the picture. Now I want to calculate the torque required to rotate the brush inside the cylinder. Can anyone...
21 June 2021 8,383 6 View