Does anyone know the differences between andesitic waters and magmatic water in oxygen and deuterium isotopes?

Why the cells die after stable transfection?

I tried stable transfection in the U87 cell line with the sgRNA-Cas9 All-in-One lentivector. Cells were cultured in a 6-well plate, 4ug plasmid was transfected after 24hs when the cell confluence...

22 February 2021 2,864 4 View

What is the best geophysical machine or device for detecting groundwater?

what is the best geophysical machine or device for detecting groundwater? Are there any machine that can detect the depth and the type of water? do I have to buy one machine or more than one to...

26 January 2021 6,149 15 View

Is Handheld XRF analyzer useable? and accurate in geochemical test?

What is the different between Lab XRF and Hanheld XRF, is it accurate and useable to analyze sedimentary rocks?

23 January 2021 9,941 6 View

What are possible factors influencing the isotope-based hydrograph separation in river confluences?

When performing hydrograph separation (EMMA method) with isotope tracers in river confluences (natural large basin), we found that the contribution of each end member sometimes exceeds the...

20 January 2021 8,403 5 View

How to perform Potential Surface Energy Exploration (PES) calculations?

I would like to receive help, as I am trying to make an analysis of the ethanol PES, but the calculations are always giving error. I use the conda-forge version of xtb (* xtb version 6.3.2...

04 January 2021 602 2 View

How to start with Principal Component Analysis?

I want to carry out PCA on a set of chemical data, some of them in oxide form and some in elemental form. The oxides are in percentage and the elements are in ppm. I have understood that, the...

14 December 2020 2,201 7 View

How to know if 87Sr/86Sr is reliable for Sr isotope chemostratigraphy in marbles?

I am currently looking for parameters to know if 87Sr/86Sr data is reliable for chemostratigrahy in marbles, and/or parameters to know if those marbles have had some post-depositional...

30 November 2020 9,032 8 View

Stable Transfected Cell lines, is the gene or protein regulated?

I been wondering if genes when stable transfected become regulated by the cell, or if the gene is constitutively express and translated and the protein previously made is degraded at a slower rate...

30 November 2020 8,095 2 View

Which isotopes can be used for preserving agricultural products?

Different kinds of Isotopes are playing very important roles in agriculture. They are used to detect different nutrient elements in soil and other crop improvement program. But which isotopes and...

16 November 2020 9,248 7 View

How much acid do I need to convert a basic solution into an acidic soluion?

Assuming that there are no chemical buffers present, can anyone confirm that if I want to convert the pH of a basic solution to the pH of an acidic solution then the amount of a monoprotic acid...

27 October 2020 9,156 7 View