09 September 2016 0 9K Report

Trying to deprotonate aromatic secondary amine, so that the resulting anion can react with aromatic C-Br bond.

I tried with NaH, trying to avoid n-BuLi and Grignard reagents.

More Sheikh Mohd Iqbal S. Zainal Abidin's questions See All
How to calculate strength degradation in a hysteresis loop (cyclic loading)?

I understand that the peak load at that specific deformation is to be taken but how do we get the % in degradation (is it by % decrease from one load to another)? Additionally, do we compare peak...

09 October 2019 10,172 5 View

Why do some researchers draw coordinate-grid lines on concrete joint especially during beam-column connection testing?

Was it to physically identify crack orientation/inclination and differentiate it between lateral, flexural, shear cracks etc? Or is it for some other function i dont know about.

03 April 2019 5,102 5 View

Is the area under the load-deflection curve of concrete tested under direct shear considered as "shear toughness"?

I tested 100x100x500mm concrete prisms under direct shear using the JSCE-SF 6 standards. Is calculating the area under the load-deflection curve considered as shear toughness or shear energy? The...

31 December 2018 3,701 1 View

What is the function of Field Output Request, specifically the 'every n time increment' in Abaqus?

I've read the manual but i cannot seem to visualize the definition. Say i'm doing a simple reverse cyclic test for a concrete for say, 50mm displacement in 2400 seconds. How does 'every n time...

10 November 2018 2,509 0 View

In Abaqus, how can i select the Reference Point in the .odb output?

I am trying create an XY data from the model via a unique nodal. But the reference point in the .cae model is not visible in the .odb output. Hence i was unable to 'select it from viewport'. Is...

10 November 2018 3,051 4 View

How to model an Engineered Cementitious Composite in Abaqus?

I've tried using the Concrete Damaged Plasticity parameters but the model just would not work. I'm trying to model a beam-column joint using ECC as the joint material (region intersection between...

10 November 2018 8,058 5 View

How can i extract XY data from Abaqus ODB File Output using a command line?

I am trying to extract RF3 (Reaction Force) and U3 (Spatial Displacement) from a uniqe nodal postion FOR JUST 1 NODE. but the size of the file is 13 million KB and creating XY data from the...

10 November 2018 9,215 0 View

How to calculate inelastic strain from concrete uniaxial stress-strain curves?

I conducted compressive and tensile concrete uniaxial test for the Concrete Damage Plasticity (CDP) data in Abaqus. But I only have normal strains under stress, how do i get the inelastic strain?

08 September 2018 4,369 2 View

What does a negative inelastic strain mean? should it be included as CDP parameters in Abaqus?

I produced negative inelastic strain in my stress-strain concrete curves (i noticed that mostly negative value were at the elastic/early stage). Do i take the negative inelastic strains and...

08 September 2018 5,516 1 View

Is it realistic to have a concrete material with 35 MPa compressive strength (28-days) but with only a 6900Mpa Elastic Modulus?

I conducted a compressive uniaxial stress-strain test for normal concrete, it achieved a peak stress of 35 MPa but when i calculated the young's modulus from the stress-strain curve in excel, it...

08 September 2018 476 14 View

Similar questions and discussions
• What the possible Persistent Organic Pollutants and Heavy metals present in fluorspar, sediments, and water bodies around its mining area?

Approximate concentrations are require in compared with the WHO permissible limts

11 August 2024 2,723 1 View

Basis set and input instruction to calculate HOMO and LUMO using Orca for Imidazolium based organic salts?

Hey there, As a synthetic chemist delving into theoretical calculations for my imidazolium-based organic molecules, I would greatly appreciate any guidance on the appropriate input instructions...

09 August 2024 5,444 7 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

Separation of organic acids-HPLC?

Hello What should be done to separate and identify organic acids in HPC when their RetTime is the same?Like oxalic acid with Propanoic Acid.or acids that have a very close RetTime.

07 August 2024 8,782 3 View

How to convert g/kg Humic acid dose to kg/ha?

I used humic acid at 0.044 g/kg soil in my pot experiment. But finally, I have to recommend kg/ha. Each pot's soil weight was 11 kg. What is the solution?

02 August 2024 7,186 6 View

What is the ionic radius of Hydrogen anion? And how to know the exact ionic radii of the elements?

I'm trying to calculate the tolerance factors of the hydride perovskite and the value calculated by me and the reported values are contradictory. Need more clarity in using the correct ionic radii...

01 August 2024 2,614 1 View

Conjugation of PEG-Amine to an Amino Acid Using EDC?

I am attempting to conjugate PEG to an amino acid at the C-terminus, for the purposes of producing nanoparticles. I have been told that PEG modified with amine groups can be used for this purpose,...

31 July 2024 2,033 1 View

How to improve peaks separation in HPLC?

Hi everyone, I'd like to better separate two close peaks coming from a bioconversion sample, I'm currently using a C18 KromaPhase 4,6mm Ø.I. SCHARLAU, particle size (µm): 10, pore size (Å): 100,...

30 July 2024 435 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 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

Our partners will collect data and use cookies for ad personalization and measurement. Learn how we and our ad partner Google, collect and use data. Agree & close