Background concentrations of PCB congeners in pristine soil?

16 June 2023 0 7K Report

Hello,

I am looking at studies where the concentrations of different PCB congeners are listed in pristine soil, in order to determine if the composition of PCBs in non-polluted soils is fixed.

Thanks

Badges
Science topic

More Anna Espinoza's questions See All

Do you think can be any Uranium bearing rocks in Eastern part of Iran and western part of Afghanistan?

I want to know more about Uranium ore deposits in world.

11 August 2024 6,720 0 View

Do you think can be any diamond bearing rocks in Eastern part of Iran and western part of Afghanistan?

I want to know more about diamond ore deposits in world.

11 August 2024 2,167 1 View

What is the difference between mathematical R^4 space and physical 4D unit space?

We assume that the difference is huge and that it is not possible to compare the two spaces. The R^4 mathematical space considers time as an external controller and the space itself is immobile in...

10 August 2024 6,678 14 View

If Banks do not provide credit facility, what are the options available for FPOs and impact on producer’s income?

10 August 2024 8,198 5 View

Controlling for pupil light reflex when analyzing pupil size time course?

I used eye tracking to examine how participants from two different populations (A and B) react to an image. Participants in population A exhibit larger pupil sizes over time, but they also have...

10 August 2024 3,229 0 View

What are a “Farmers Producer Organization” (FPO) and its essential features?

10 August 2024 477 5 View

Strugglling with m6A dot blot any suugesstion ?

I have been doing the m6A dot blot for a while with no improvement, I am extracting the RNA, and I can see the dots although the three biological replicas give a different reading on the memberan...

10 August 2024 8,539 5 View

Do interactions between biosphere, carbon cycle, & water cycle impact global warming & interaction between atmosphere & hydrosphere?

How do interactions between the biosphere, the carbon cycle, and the water cycle impact global warming and interaction between the atmosphere and the hydrosphere?

09 August 2024 3,291 2 View

How to get moment output in Abaqus Standart?

I have input a moment load in module load Abaqus, i put my moment load on the node surface (using reference point). I have define moment in history output and make a set for moment too. But the...

08 August 2024 4,831 4 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

In passive sampling, can polymer-lipid partition coefficients be applied independent of environmental salinity?

For example, if low-density polyethylene (LDPE) is equilibrated with PCB contaminated marine and freshwater sediments, can LDPE-lipid partition coefficients be used to obtain equilibrium...

28 July 2024 263 1 View

Unable to find LO and mixer in 2216MHz to 470MHz downconverter model (AiDC+1746D Transystem inc. )?

Hi, I am doing analysis of Transystem inc. Downconverter model AiDC+1746D with RF=2216-2300MHz to IF=470-554MHz. The issue that I am unable to find frequency synthesizer and mixer, only 6.8MHz...

09 June 2024 8,378 7 View

[Help} E-field visualization set up in CST?

Dear All, My simulation includes: 1 Huygen's box (file .fsm) radiating onto a PCB. The Huygen's box is an equivalent model of an antenna with an input power of 10W. I have set up a Field monitor....

22 April 2024 7,034 0 View

Design of compact Battery Charger?

Description : 1. Input rating - Nominal 230V AC. Max 300V AC - Single Phase 2. Output rating - 60V, 15Amp max 3. Efficiency > 90%, 4. Max operating ambient temperature: 50 deg C 5. Volumetric...

02 April 2024 7,339 3 View

How to conduct a meta analysis comparing PCB concentration in different cetacean species in R ?

I was told to use metamean function in R which I'm not familiar with to work out the mean values of PCB concentration in cetaceans . I would like to compare across species and sex . However some...

24 March 2024 4,595 2 View

How can I export Keepout layer (Board Outline) from CST?

Hi all, I need your help. I want to order my designs as PCB. Most of the PCB manufacturer sites accept for order designs in Gerber format. I converted my designs to Gerber file from CST. But they...

23 March 2024 667 3 View

Is there a way to combine data on a species across different studies to get a mean value for in my case PCB concentration?

In some studies authors report concentrations of each individual in a sample but some report the mean from the whole sample. is there a way to combine these to get a mean value across studies for...

20 March 2024 685 0 View

How I design 1000W inverter using SMPS and What factors I need to keep in mind during calculation of inverter and battery charger?

I want to design an 1000 Watt inverter using SMPS. It's my first time when I'm designing an inverter. I'm confused regarding calculated part. From where I start calculation and also I want to...

04 February 2024 3,181 2 View

How do you enhance phycocyanobilin incorporation for your protein?

I have a phytochrome protein that takes PCB. The SAR is very low when i coexpress the phytochrome with the pigment producing enzymes. So usually we used to add PCB from external sources. However,...

31 January 2024 3,138 1 View

PCB manufacturing: How to detect Cu residuals in Ni/Au surface finishing?

Metroology method scanning big areas ~ 10" scale to detect Cu residuals in a metal layer compound with Ni/Auf surface finishing

07 January 2024 938 0 View