Purchasing Power Parity Exchange Rate?

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How the parameters (such as Mw, Chemical bonds, polymer bland and so on) affect the mechanic property of polymer (such as storage, loss modulus) ?

Anyone can recommend any books on such topics? Thanks in advance.

02 March 2021 8,457 2 View

What does this PZC data mean?

I measured different kinds of catalysts which were dispersed in DI water.I firstly added certain amount of HCl and then used NaOH to titrate and measure the pH value. What does this result mean?

27 December 2020 5,728 4 View

How to analyze a time series of temperature mean whether different or not?

I have 6 culture tank, 2 treatment with 3 replicate. I test temperature of every tank everyday, for 14 days. Now I want to compare whether this 2 treatment temperature have significant different...

06 December 2020 834 7 View

Species Transport in Porous Media cannot pass through?

I'm using ANSYS Fluent 2019 with Space claim, my problem is involving moisture diffusion (therefore using Species transport). I found that my h2o can never pass through the porous zone. I have...

09 October 2020 5,301 3 View

How to set different moisture mass diffusivity for different material?

I'm modelling moisture diffusion into this Bi-material. Meaning one fluid diffuse into different 2 material (Pic below). Hence I would require to set different Mass Diffusivity & Porosity in this...

25 May 2020 528 3 View

Why not able to Import Pressure from FLUENT to Static Structural?

I'm currently doing a Modelling in Fluent (and Transient Thermal) and intend to Import Pressure Load to Static Structural. The Stress from Thermal Load was able to be imported but not from...

02 May 2020 2,910 3 View

How do we get features from Dictionary Learning?

I'm using dictionary learning for structured data, something like the credit card fraud and iris dataset. As we all know dictionary learning is similar to principal component analysis and it can...

02 December 2019 5,072 3 View

Can anyone recommend a self-efficacy scale for dietary behavior?

I searched a lot and find most self-efficacy scales are for diabetes or CVD or weight loss, etc. Even the DIET-SE is about low-fat and low-salt, I fail to find a scale only about 'general healthy...

01 July 2019 4,202 3 View

Has anyone purify protein bound to strep-tactin XT using desthiobiotin?

We just bought the new strep-tactin XT for protein purification. The manufacture recommends to use 50 mM biotin to elute the protein. While 2.5 mM desthiobiotin is suggested for protein...

13 June 2019 5,328 5 View

What is the best Signal Processing Method to take effects of reverberation into account for passive acoustic source localization?

We have multiple arrays of microphones, each array well seperated from others on the ground. Our task is to track an aircraft that happens to pass by. But the terrain is such that there is a lot...

15 November 2018 8,213 3 View

How to dissolve cross-linked Amberlite IRC120 H, hydrogen form resin?

Hello all, I have used Amberlite IRC120 H, hydrogen form acidic cation-exchange resin for the ion-exchange of waterglass [sodium silicate solution -- 40% Sodium silicate (mol ratio > 3.2)...

21 February 2021 5,614 3 View

Do the introduced salts (NaOH/ HCl) influence the spectroscopic shifts of the fluorescence excitation-emission matrix?

During the resin (XAD-8) fractionation of wastewater salts (NaOH or HaCl) are used for acid or base elutions/pH adjustments. Since the amount of introduced salt is minimal, so is it required to...

08 February 2021 9,489 2 View

Why is anionic exchange chromatography more common than cationic exchange chromatography?

Is it true that there are more negative charged proteins?

18 January 2021 8,302 2 View

How to synthesize pyrrolium ionic salt?

I am keenly interested in the synthesis of heteroaromatic ionic salts for use as an organic template. I want to synthesize alkyl pyrrolium chloride or bromide through a simple addition reaction...

30 December 2020 2,778 3 View

What should be the ideal Thiolated-Oligo:GNP ratio for effective conjugation?

I need to conjugate thiolated oligos to GNPs and I am wondering what concentrations of the oligo to use with what concentration of GNPs for effective conjugation.

08 December 2020 7,975 2 View

Why contaminant is eluted with target proteins in cation exchange chromatography?

Me and my partner are doing project involving the purification of equine IgG using both anion and cation exchange chromatography. The main purpose of our project is to separate IgG from other...

10 November 2020 3,377 3 View

Ways to establish exchange bias in ferromagnet/ antiferromagnet heterostructure?

When ferromagnet (FM) and antiferromagnet (AFM) are coupled, exchange bias can be generated at the interface of FM and AFM which acts as a bias field in the hysteresis loop. I am particularly...

24 October 2020 8,580 1 View

Do you need to acidify your samples prior to desalting with C18?

I am wondering how important pH is here. I have a sample tryptic sample in 50mM TEAB, wondering if I need to add in TFA to ~2% before desalting. I understand the need to acidify samples with ion...

18 October 2020 6,639 3 View

How can DEAE-cellulose column be used for purification of an unknown enzyme?

Im planning on using Ion Exchange Chromagraphy by DEAE-cellulose column for purifying an unknown cellulase from soil bacteria. How do i decide on the pH of the column buffer if protein pI is...

11 October 2020 4,009 3 View

Gas Sensing !! What are the available equipment/tools to find out the composition of gas mixtures ?

We are looking for the equipments/tools to find out the composition of gas mixtures for one of our projects on gas separation. Do you have any idea of how it may impact the following - What...

04 October 2020 2,960 4 View

Lall B. Ramrattan

The Pennsylvania World Tables (PWT) on the web use to provide this data free. Part of it was being updated by researchers at UC Davis, Ca. This is a good place to start.

Sok Heng Lay

Thank you Dr. Lall B. Ramrattan and Dr. Jose Mora for helpful comment. I could find it now although the data is annual.

Kind regards,