Kamyar Amirhosseini

21 Questions 57 Answers 0 Followers

Questions related from Kamyar Amirhosseini

How to handle base call ambiguity in mitochondrial COI barcoding bioinformatics workflows?

I have some uncertainty regarding the use of IUPAC ambiguity codes beyond 'N' in mitochondrial COI sequences. In my experience, barcodes typically only include 'N' for ambiguous bases, and I am...

last month 6,290 3 View

How to construct a phylogenetic tree at the family level from available sequences on NCBI?

Hi all! I want to construct a phylogenetic tree of all earthworm (Lumbricidae) COI sequences available on GenBank. My search on the NCBI nucleotide database has retrieved about 10,000 sequences....

07 April 2025 9,636 4 View

How to maintain soil moisture level at field capacity in a pot experiment?

I have been boggled by a seemingly simple problem. Many studies state that "The water contents of the pots were checked daily by weighing and adjusted to field capacity." How is this performed?...

09 June 2024 5,285 8 View

To which taxonomic levels do different approaches allow for prokaryotic identification?

I need to know to which taxonomic levels (from phylum to species) the following approaches allow prokaryote identification: a) morphology-based approaches b) chemotaxonomy c) GC content d)...

24 January 2024 4,574 6 View

How to prepare soil samples for microplastics exposure treatments?

In research where the objective is to study the impact of microplastics on soil properties, is it necessary to evaluate the original microplastic concentration of the test soils? If the soils...

28 November 2023 294 8 View

What biofilm carriers are commonly made of?

I am planning to cultivate algae-bacteria biofilms under greenhouse conditions using biofilm carriers. I have routinely come across Industrial Soft Carriers as frequently used substrates for...

07 June 2023 2,952 1 View

What percentage of library matches are generally acceptable in microplastics analysis?

I recently ran an FTIR analysis to identify two unknown microplastics. The result indicates a matching percentage of over 50% with polyethylene for both particles. However, I wonder if these...

15 May 2022 1,637 5 View

Could the origin or source of microplastics be determined by their physical characteristics or shape?

This might be a long shot, but a while ago I read an article that provided detailed information on how the physical characteristics of microplastics (more precisely, the shape of particles) could...

28 March 2022 10,092 5 View

Will microplastics extraction be compromised if depth filters are used instead of surface (membrane) filters?

Normal Ashless quantitive filter papers from CHMLAB are readily available for me to purchase. However, I understand that using depth filters may compromise microplastics extraction processes as...

25 December 2021 3,629 5 View

How to calculate the amount (in grams) of NaCl required for 600 ml of saturated salt solution with density 1.2 g/cm3 ?

Any help is appreciated.

13 November 2021 587 11 View

How does stability of organic acids differ in most soils?

I recently read in a review article that oxalate is the most stable organic acid in calcareous soil which is due to the formation of ca-oxalate reducing its biodegradability. does this notion hold...

29 December 2020 6,270 3 View

Why does MgCl2 solution displays less conductivity than NaCl at constant ionic strength ?

This question is related to the application of EC in estimating the Ionic strength of a solution. But I have difficulties interpreting the difference between MgCl2 and NaCl curve. Any help is...

15 December 2020 5,922 3 View

Does CEC have an effect on the type of cations adsorbed?

I came across a confusing concept in a reference and was wondering wether increasing CEC, increases the preference of adsorb sites to bind with cations with higher valence ? For example divalents...

03 March 2020 3,925 3 View

CHMLAB ashless quantitative filter paper.

I am currently working on Microplastics pollution in farmlands and I have stumbled upon CHMLAB filter papers. Since I am not familiar with the lab products, I was wondering if anyone could provide...

01 January 1970 4,772 2 View

Describing microplastics degradation mechanism via biological processes.

Hello everyone! I was recently asked a question on whether biodegradation of microplastics into smaller plastic particles (e.g. nanoplastics) by microbial communities actually increases the...

01 January 1970 9,323 2 View

Preparing plastic-free soil samples for use in ecological studies of microplastics?

I have recently come across multiple articles in which the authors state that they have used soils from farms free of plastic use history. They further confirm this by conducting polymer...

01 January 1970 8,551 1 View

Addressed to researchers in microplastics: Share your thoughts on the 'Microplastic pollutants' book

Dear researchers, I have benefited from the book titled 'Microplastic pollutants' by Crawford and Quinn (link below) during my studies on the effects of MPs on the soil environment. I have...

01 January 1970 5,388 1 View

Official portals for agricultural workshops

Hi all! I have been trying to get a hold of official and legitimate databases or listings for online agriculture-related workshops. I know FAO has an extensive e-learning academy that offers a...

01 January 1970 4,608 6 View

Innovations in Soil Health: What Are the Most Promising Practices for Enhancing Soil Fertility and Structure in the Next Decade?

I am eager to know your insights on cutting-edge practices, technologies, or methodologies that show potential in improving soil health. From microbial applications to sustainable farming...

01 January 1970 9,726 6 View

Exploring the Microbial Universe Beneath Our Feet: The Evolving Landscape of Soil Biology Research

Over the past three decades, soil science has undergone a significant transformation, with a growing focus on the intricate world of soil microbiology. As researchers delve into the soil's...

01 January 1970 9,535 3 View

Enhancing Scientific Integrity: Best Practices for Publishing and Retracting Research

Maintaining the integrity of published research is paramount in the era of rapid scientific advancements. This discussion explores effective strategies and best practices for publishing scientific...

01 January 1970 7,015 17 View