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Questions related to Mass
Does Agilent 240 series ion trap mass spectrometer is suitable for metabolomic analysis?
27 November 2019 4,382 3 View
I would like to hear from fellow behavior analysts on massed trials and interspersed trials. Maybe I did not understand the concept well, so I will post here what I understand by each type of...
26 November 2019 8,583 1 View
I am working on a project involved drug metabolism by NADP/NADPH enzyme. I want to remove the enzyme from my reaction mixture. I am looking for the amicon centrifugal concentrator to remove that...
18 November 2019 1,227 3 View
Can we consider the percentage of mass loss between 420 ⁰C to 500 ⁰C as the percentage of calcium hydroxide? or any other method are there to calculate the percentage of calcium hydroxide from TG...
14 November 2019 8,225 1 View
The mass spectrum of benzoic acid will generate the fragment as a base peak (100% relative abundance) of m/z (mass to charge ratio) at?
08 November 2019 1,257 3 View
Hi! Tell me if you are familiar with Microtrack equipment. Does Microtrac have a scattering angle of only 180 degrees? What are the advantages of Microtrac devices in comparison with other...
22 October 2019 3,209 6 View
This question is related with epidemic models.
18 October 2019 9,410 1 View
I found several pre-exponential factors for the reaction rate of calcium carbonate crystallization. They are usually given in m^4 kg^-1 s^-1. Is there any change I can convert them to m^4 mol^-1...
08 October 2019 3,840 1 View
Why refractive index of media depends on the wavelength of light passes through it? What are the fundamental quantum mechanical reason that why light slow down in the denser media?
07 October 2019 7,579 3 View
My Project is on nano particles synthesis from biological mass, I synthesized NPs but I am actually a bit confused how to calculate their yield. If some has done with it then guide me on it.
25 September 2019 8,073 3 View
I have callus masses some are whitish and compact, while others are yellowish and friable , can i called them embryogenic and nonembryogenic calli. i means callus which do not give shoots can be...
17 September 2019 1,060 1 View
Can mass be always considered equivalent to weight ?
17 September 2019 7,863 3 View
Dear RG members, I analysed a samples twice in XRF analyzer with two different options first "Oxides-analysis" and second was "Elemental-analysis". With the first option, the % of SiO2 was 66,...
11 September 2019 3,094 3 View
Both recrystallization and sublimation have been tried, and i took the Mass Spectra after the aforementioned purification methods, the molecular weight is right and from the Mass Spectra i can...
02 September 2019 7,532 5 View
What I think I need to know is: 1) What is the current accepted shape of the Milky Way galaxy, and its sub-parts, such as core, halo, etc? Some documentation shows a sphere for dark halo, but...
30 August 2019 7,784 5 View
Hello Everyone, As we know that, molar mass of Air is 28.97 g approximately, which is the average value of molar masses of mixture of gases. Now, If I create a vacuum from that air, and there is...
22 August 2019 7,474 11 View
I'm developing a material to remove ammonia from water samples, and I'm wondering what would the best parameter to measure ammonia concentration by? I'm following EPA Method 349.0 for preparation...
13 August 2019 7,491 1 View
Hello,I'm trying to find frequences and mode shapes of a cantilever beam with a tip mass!!!!! I used DQM but can't solve the system of equation because of boundry conditions can't reach the...
23 July 2019 7,667 3 View
I have to calculate the quantity of Mg(OH)2, KOH and NaOH separately in the mortar samples. Similarly as we calculate percentage mass loss of Ca(OH)2 by TGA testing of mortar in the temperature...
22 July 2019 2,548 3 View
Hi, I am having an issue with ABAQUS timestep been too small for explicit analysis. It has reached 10e-12 and is constant. Is there any way the timestep can be increased for faster...
19 July 2019 1,190 1 View
what are types of boundary condition for simulating of pollution transport in Mt3dms of GMS software? I made a transport model in GMS but i dont put any boundary condition in my model and just...
16 July 2019 8,547 3 View
Hi, I'd like to compare between mass spec. results of 2 samples that I have (each sample has 3 biological replicates). Following several filtration steps- I have a list of proteins that were...
16 July 2019 7,027 8 View
I bumped into a few paper covering the topic of electrical conductivity in spinel NiCo2S4. However, the two seem to be arguing the opposite. One read: "In general, the electrical conductivity...
12 July 2019 1,585 2 View
It is a general fact that non-point sources are difficult to estimate. I am searching for different options where "Chemical Mass Balance" approach is one and probably good approach. Those of you...
10 July 2019 2,534 2 View