How accurate is the shear modulus measured using PROCEQ DPC transducer of 40kHZ frequency on 100mm concrete cube specimen?

It is required to evaluate shear modulus of concrete cube specimen of 100mm size. Since the diameter of DPC transducer is around 84mm, I would like to know whether it can give reliable shear wave...

02 February 2021 1,052 3 View

How to solve this definite integral???

Please help me to solve the integral: $$\int_0^{-2w}\phi^{-k-\frac{1}{2}}\frac{{_2F_1(k-\frac{1}{2},k,k+\frac{1}{2};1-\frac{k-\frac{3}{2}}{\phi})}}{\sqrt{-\phi-2\omega}}$$ (see the attachment) I...

17 October 2016 5,884 9 View

What are the methods to fragment genomic bacterial DNA to get ~kb size fragments?

What are the conventional methods to fragment bacterial DNA to get ~1-10 kb size fragments? Is there any review paper or other publications out there if it's a very broad set of methods? Any...

25 February 2016 8,998 2 View

Doubts regarding PVDF material and poling procedure.?

I request you for help to clear these doubts 1 I heard that trfe and tfe adding to pvdf will increase the cristalinity , did HFP will increase the cristalinity if we add this to pvdf,, 2 in poling...

18 April 2015 7,094 1 View

How can I define amplitude and interaction in dynamic explicit analysis for sheet metal forming in ABAQUS?

07 January 2015 1,077 3 View

How can we find out the elasticity matrix for practically any material?

04 January 2015 9,724 6 View

How can one carry out a dynamic explicit analysis in ABAQUS?

While carrying out a dynamic explicit analysis in ABAQUS for a metal forming process, I encountered a problem while defining Boundary conditions. The following message popped up: "In an explicit...

27 November 2014 6,490 5 View

Is there any specific method to test the multi alternative hypotheses (either in classical or in fuzzy)?

Consider 2 or more groups to be compared. So is there any specific classical or fuzzy methods are there for comparing them to the population parameter? If so kindly provide me the name of the methods.

20 July 2014 3,313 1 View

Is there a particular reason DPV is preferred over EIS or are there any cons or advantages of one over the other?

I have seen hybridization assays (detecting hybridization events) using both EIS (electrochemical impedance spectroscopy) and DPV (differential pulse voltammetry). I have seen less of EIS being...

04 August 2013 739 4 View

How to reduce noise during differential pulse voltammetry? Effect of working electrode area?

I am trying to run DPVs using a GCE/glassy carbon working electrode on Ruthenium in 0.2 M acetate buffer (Pt CE & Ag/Agcl RE). When I try using a lower surface area electrode I see that noise...

06 June 2013 6,409 19 View

Uncertianiny in using dry or wet basis in mixing a sediment with fuel oil?

Hello I'm currently working on a topic related to studying the anaerobic biodegradation of TPH in marine sediments. In this work, sediment should be mixed with fuel oil to a concentration of 20 g...

24 February 2021 9,839 3 View

How to consider effects of rapid warm adaptation in modeling of ecological impacts of warming?

I would highly appreciate it if my fellow ecologists (biologists) provide their opinion on the thoughts below [esp., shortly tell us which path may be more effective, if they know another way, if...

15 February 2021 3,642 6 View

What are the natural background values of Major,Trace and REE elements in sediments deposited by Indian rivers?

We are working on geochemical analysis of sediments derived from eastern and western ghats of India.

20 January 2021 8,963 6 View

How deep into the sediment do marine/riverine oligochaetes live?

I am working with intertidal muddy sediments. In one of my sites the sediment was extremely muddy (high % of silt), oxic layer was shallow, and there were a lot of oligochaetes. I would like to...

14 January 2021 7,269 4 View

Is there any relevant technique for mesocosm studies in marine environment using Nanoparticles?

I am planning to perform mesocosm study in simulated marine environment using Phosphorus based nanoparticles, i would be using marine micro-organisms in it. kindly suggest me some effective...

07 January 2021 5,877 3 View

How does titanium dioxide (TiO2) as a coating's component enhance the coating performance in terms of anticorrosion??

Greetings, Recently, I was asked by a researcher how does TiO2 enhance the coatings polymeric structure making it able to reduce corrosion reaction by preventing the penetration of aggressive...

02 January 2021 5,257 5 View

How to identify paramagnetic, ferrimagnetic and ferromagnetic from magnetic susceptibility data ?

Dear All, I have calculated Xlf, Xhf, and Xfd% of my sediment samples by using Bartington MS2B magnetic susceptibility and got mass-specific magnetic susceptibility value on 10-8m3kg-1 (10...

28 December 2020 4,728 5 View

Is there any chemical safe for sea environment, but could be used for repelling planktons and microorganisms?

As an example of Julia Child, whose first receipe was shark repelent, my team and I are looking for some chemicals which wont harm planktons but will help keep planktons from our robot in sea.

20 December 2020 9,616 4 View

Hybodontiformes - last survivors?

Hello Everyone, I just ran into the work of Boisvert et al., 2019, in which I found fig. 4.2 a bit confusing. It shows, that Hybodontiformes (pale green) survived till the Miocene, however, as...

13 December 2020 5,180 3 View

Is there any chemical environment or parameters to define or explain the sediment and soil profiles, are they separated by chemical parameters?

Sediment is relatively younger than the soil in the depositional environment as the sediments are consequence of the accretion of particles transported either by waters or by winds, whereas, soil...

12 December 2020 4,822 18 View