How deep a NIR spectra can reach in a wood sample? What is the influence of moisture and density of the material on the penetration of the spectrum?

More Paulo Ricardo Gherardi Hein's questions See All

How to use Density Functional Theory to calculate carrier mobilities of solid system?

Hello, everyone. I have tried to determine carrier motilities of some materials, by Density Functional Theory, using Quantum ESPRESSO. There are a few methods to do it, like a package called...

04 August 2024 8,894 1 View

Which is the best model for hypoxia in cell culture ( MSC or fibroblasts)?

I am tring to culture cells in hypoxia using Cobalt chloride model , but I want to compare with antoher method. Our research is about circRNA expression - qPCR and nanopore oxford sequencing.

05 June 2024 2,246 1 View

Another opportunity to work in science area, anyone is interested?

One more opportunity of work on the science area. Title- Scientific Reviewer Duration – 12+months (extension) Location – Bethesda, MD Work Details: Complete the administrative review of grant...

08 May 2024 5,344 3 View

Is bitcoin the ultimate digital escape?

Topic from my first article published, download it to get full quality or check the publication page here: https://www.accept.pt/fundamental-concepts-of-global-society/

03 May 2024 6,414 0 View

Loss of Family Values: The Erosion of Society’s Foundation, what impact does it have on society?

Topic from my first article published, download it to get full quality or check the publication page here: https://www.accept.pt/fundamental-concepts-of-global-society/

03 May 2024 694 0 View

Educational System: The Pyramid of Workers, Not Thinkers, how does it affect the new generation?

Topic from my first article published, download it to get full quality or check the publication page here: https://www.accept.pt/fundamental-concepts-of-global-society/

03 May 2024 5,643 0 View

Why does inflation matter?

From my article: Inflation erodes the purchasing power of our hard-earned cash, leaving us with less value over time. Dollar, the most important currency, the reserve currency of the world,...

02 May 2024 3,326 3 View

Vacancy of manager of bioinformatics in USA, are you interested?

Dear ResearchGate community, I received the contact of a recruiter in my email regarding another vacancy in USA. Title: Bioinformatics Training Program Manager Duration: 12 months Location:...

18 April 2024 1,544 0 View

Do you know anyone who would interested in this vacancy?

A Vacancy of Sr Scientist Duration: 12 months Location: Bethesda, MD/USA Job Description: Contribute to the generation of stable cell lines for vaccine and therapeutic protein candidates...

09 April 2024 7,732 2 View

Is there a simple formula to estimate the prevalence of a disease (in this case, carriage) in a longitudinal one-stage cluster sampling?

Hello everyone, I would greatly appreciate it if someone could assist me in understanding the steps required to estimate the sample size for a longitudinal study. Or advise bibliography. I am...

04 April 2024 2,882 0 View

Which type of compound does lamda max of 218 indicate in a uv-vis spectrum of a partially purified compound through column and TLC?

A crude extract of fungal culture using EtOH was subjected to column and TLC and partially purified compound was obtained. UV vis spectrum of the compound/s has max absorbance at 218nm. The...

11 August 2024 9,801 2 View

Baseline drift in HPLC? What causes this?

Hello, Why do i see this baseline drift when i compare my blank (black) to the sample (blue)? Any suggestions as to why this happened? Thank you!

11 August 2024 3,770 4 View

Why might the impedance values for DI water and 0.1X PBS buffer solution exhibit a decreasing and increasing trend, respectively over time (HP 4194A)?

Hello everyone, I'm encountering an issue with my electrochemical impedance spectroscopy (EIS) measurements and would appreciate some insights. Experimental Setup: Electrodes: Gold interdigitated...

05 August 2024 3,783 2 View

Can a Conventional 50W visible LED Lamp Emit UV Light?

I'm researching light sources and their UV emissions. I'm curious if a 50W, 7500K conventional LED lamp emits any UV light. I found that a 200W tungsten lamp can emit up to 1.5 mW/cm² at 350 nm....

31 July 2024 3,843 7 View

Mossbauer spectroscopy Co0.6Mn0.4Fe2O4 MNPs?

Following curve related to Co0.6Mn0.4Fe2O4 Magnetic nanoparticles with extra phase a-Fe2O3. I will appreciate to help me to interpretation this spectroscopy, especially the blue line.

31 July 2024 9,140 2 View

How to calculate conductivity using Electrochemical Impedance Spectroscopy's Nyquist plot?

Hello everyone, I am new to this characterization but watching videos on youtube I have already plotted a Nyquist plot (Z' and -Z'') and already fitted models on my material using Zsim. But now I...

29 July 2024 1,376 0 View

How can we calculate the percentage of configuration interaction (CI) in the UV output data of the Gaussian program?

How can we calculate the percentage of configuration interaction (CI) in the UV output data of the Gaussian program? for example: Excited State 17: Singlet-A 5.1359 eV 241.41 nm...

28 July 2024 9,165 2 View

Why semicircle of nyquist plot is not complete?

While I am doing HER, I noticed that nyquist plots of Electrochemical Impedance Spectroscopy (EIS) is not complete. Will it affect for the Linear Sweep Voltametry (LSV) data? However, I can found...

26 July 2024 7,542 4 View

What is single absorption ESR spectroscopy ?

In the context of Electron Spin Resonance (ESR) spectroscopy, under what conditions is an absorption spectrum considered to be a single absorption spectrum?

25 July 2024 2,325 1 View

Can we fit a gaussian Fit on a LIBS Peak ?

Though much literature suggests fitting a Voigt profile on a LIBS peak, is it also possible to fit a Gaussian profile on the LIBS peak? I have 204 spectra files, and I am building a pipeline for...

23 July 2024 6,127 1 View