Does anyone have good references on how to measure Boron-10 in fossil corals?

More Henk Heijnis's questions See All

How can you calculate the internal energy of a gas from the equation of state?

Let us say that I have an equation of state for a non-ideal gas (i.e. the Vanderwaals equation). I would like to calculate the internal energy of the gas U(V,T) without any 'microscopic input'. 1)...

21 March 2024 2,130 3 View

Which solutions have been proposed to Schroeder's paradox?

Schroeder's paradox states that a polymer(gel) swells more in contact with a pure liquid than the vapor in equilibrium with this liquid. Thermodynamics states that both the liquid and vapor have...

20 September 2021 5,822 0 View

Electrical Impedance Spectroscopy - how to estimate charge carrier density and mobility?

Presently, I am measuring the frequency dependent conductivity and permittivity of a powder subject to water vapor. From my data I would like to estimate the charge carrier density and the...

22 January 2021 8,390 2 View

Is 1 kb of DNA strand good for CRISPR?

Hello! I want to use CRISPR to replace a large strand of DNA. My strand is a little bit over 1kb, is this a problem? Moreover, what length should the homology arms be for a region this size?

01 March 2020 10,014 2 View

Does anyone have some practical tips on how to prepare giant Tridacna shells for non-destructive XRF scanning and LA-ICPMS?

Tridacna shell preparation for non-destructive XRF scanning and LA-ICPMS

25 August 2014 377 3 View

Is there an azole specific efflux family in fungi?

It looks like azole transporters are similar in many fungi, saprophytes, plant and human pathogens. Many of hte azole transporters have homology to CDR1, like BcatrD (and a bit B) from Botrytis...

03 April 2013 1,415 1 View

What is a good website to compare lab products

As a technician I sometime want to compare different lab products. There are a lot of website and I am wondering which websites you use?

01 January 1970 5,272 13 View

Trizol contamination? and method

I cultured in-vitro bacteria (1X10^8 cells) and I used Trizol to extract the RNA. After I separated the phases I mixed 0.4 mL of the upper RNA phase with cold isopropanol. Before I measured the...

01 January 1970 2,475 0 View

How is energy cycled through the Earth's climate system and how do matter cycle and energy flow through the rock cycle?

08 August 2024 8,162 0 View

How to calculate CCS for Sodiated adduct ions and Multiply Charged Ions?

I'm currently working on calculating the collision cross section (CCS) for various ions, and I'm facing challenges when dealing with sodiated and multiply charged ions. Most of the resources I’ve...

08 August 2024 8,329 0 View

How does energy flow through Earth's systems and how does that affect climate and biosphere affect the flow of matter and energy on Earth?

02 August 2024 2,699 2 View

Which is more important: The human factor or the technological factor in combating climate change?

On a personal note, even though technology has attracted a lot of interest and funding to combat climate change, it is becoming more and more clear that taking care of the "Human Dimension" is...

02 August 2024 6,773 12 View

Have you heard about Technological Surveillance on Oceanographic Research Vessels?

It is important to highlight that technological surveillance on oceanographic vessels is a collaborative effort in which different specialists work together to effectively leverage technology in...

31 July 2024 1,633 0 View

Given the current level of natural phenomena cause by the climate change and environmental pollution, will the AI find the technological solutions?

AI-driven technologies offer previously unheard-of capabilities to process enormous volumes of data, extract insightful knowledge and improve predictive models, according to the UN’s World...

31 July 2024 9,733 3 View

Inquiry on Maximum Nucleic Acid Volume for 2.5 mL Liposome Solution?

I am currently working on a project involving liposomes and need to determine the maximum volume of siRNA that can be added to a 2.5 mL liposome solution with a total lipid concentration of 10...

30 July 2024 6,420 1 View

"How to handle large negative geopotential values at the surface in reanalysis datasets?

I have observed in some cases there are large negative values of surface geopotential in Era5 and MERRA2, in most cases in regions with complex orography. Why this happens? How can i handle this?

27 July 2024 4,628 2 View

How can I use DFT-D3 correction ( Siesta version 5.0.1)?

Dear Siesta Users, I installed Siesta 5.0.1 and I want to use Grimme's D3 correction. According to the 5.0.1 manual, I could use a few parameters to include the D3 correction in the...

27 July 2024 5,748 0 View

EDC carbodiimide and NHS easter 's half life among different pH?

It has been long known that EDC carbodiimide and NHS easter's half life agains hydrolysis are highly related to pH. However, very surprisingly, not yet found a paper giving a table/chart of their...

25 July 2024 8,738 0 View