01 January 1970 7 9K Report

What is the "Biomechanics" of "heliotropism" as exhibited by Sunflowers? Can any one technically explain the physics and chemistry responsible behind?

More P.K. Karmakar's questions See All
In Chip-seq, what will be the impact of adding proteinase K before removing the magnetic beads?

I was following this chip-seq protocol https://www.cellsignal.com/products/chip-kits-reagents/plus-sonication-chromatin-ip-kit/56383 what will be the consequence if on the following state "VI....

20 July 2024 5,612 0 View

Researchers, if asked, which 5 Indian Gangster movies would you rate highly or recommend?

Why do I not try one on a Gangster or Mafia movie(s)? This is what I have been thinking for a month or so. Finished the one on ED (Emily Dickinson), and submitted it to a journal.

21 June 2024 2,717 2 View

Anybody has the following paper?

Menke, Arnold S. (1977). "Aha, a new genus of Australian Sphecidae, and revised key to the world genera of the tribe Miscophini (Hymenoptera, Sphecidae, Larrinae)". Polskie Pismo Entomologiczne....

29 February 2024 3,765 1 View

Are you working on any aspect of Anopheles stephensi?

Hi colleagues, You may be aware that Anopheles stephensi, the urban malaria vector has been recently recognized as an important invasive species. I would like to know who are working on this...

02 January 2024 5,726 6 View

Would you please share the index of first lines / poem index of the book 100 Selected Poems: Emily Dickinson?

I do have "The Complete Poems of Emily Dickinson."

01 January 2024 5,297 0 View

Will the universe expand forever?

We know that the universe is expanding with acceleration. Can there be any event of such a large scale that can alter the trend of expansion and begin contraction or even stagnant universe?? Lets...

25 December 2023 8,898 3 View

When we add template in a ready to use master mix for PCR amplification, the sample/template get diluted?

I used a established PCR kit to amplify the target DNA. The instructions from kits was given to use (1.5-15ng/ul) concentration of DNA. After DNA extraction procedure i got 23ng/ul;then i adjust...

13 November 2023 4,699 4 View

Any protocol set for fish ethology study with different parameters?

Hi! I am quite a novice in the field of fish ethological research. I am looking for a step-wise guide for parameter choice and data analysis. Especially the movement tracking and behavioural...

08 October 2023 7,282 3 View

How can SMEs practice Lean Management with limited resources and skills ?

SMEs (Small & Medium Enterprises) have low labor intensity and do not have skilled lean practitioner. Productivity and competitiveness for SMEs are usually low and experience challenges to...

07 October 2023 2,565 8 View

Researchers, do you by any chance have any soft copy of the book 𝘓𝘦𝘵𝘵𝘦𝘳𝘴 𝘰𝘧 𝘌𝘮𝘪𝘭𝘺 𝘋𝘪𝘤𝘬𝘪𝘯𝘴𝘰𝘯?

𝙇𝙚𝙩𝙩𝙚𝙧𝙨 𝙤𝙛 𝙀𝙢𝙞𝙡𝙮 𝘿𝙞𝙘𝙠𝙞𝙣𝙨𝙤𝙣 by Emily Dickinson (Author), Mabel Loomis Todd (Editor)

28 September 2023 6,709 1 View

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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

Best mask design for metal deposition aiming build a Perovskite solar cell device?

What types of mask designs for metal deposition, to be used in a PVD system, are best suited for perovskite-based solar cells?

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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 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

Mechanochemistry: ball to powder mass or ball to powder volume?

I run mechanochemical reactions that involves the use of a large amount of catalyst (1:1 molar ratio to the reactant). When I try to understand the effect of amount of catalyst on the reaction, I...

23 July 2024 9,938 1 View

How to eliminate the carry-over effect in GC-MS/MS system?

Hi, I am a PhD student working at Jagiellonian University, Faculty of Chemistry. My work is related to the development of new analytical methods for the quantification of short-chain fatty acids...

22 July 2024 5,492 6 View

MDCI module in Orca software?

Dear Researchers, My question is associated with the "MDCI" method in Orca. Please let me clarify my question using a simple example: Suppose we are going to perform CBS extrapolation using "!...

21 July 2024 1,632 0 View

What are the principles of physical chemistry?

what are the main points

10 July 2024 9,236 5 View

What is the recommended type of pseudopotentials for QE?

Hello dear colleagues and professors Please what is the recommended type of pseudopotentials for QE? ultrasoft or norm conserving?? And from where get all types of pseudos (us, nc, pbe,...

09 July 2024 9,541 5 View

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