Waters 2707 HPLC autosampler problem?

I am using a 2707 waters HPLC device. When I try to inject a sample, it says missing plate or rack. I changed the needle and calibrated its position but I still get the same problem. I even get...

02 March 2021 1,408 1 View

Experiment statistical analysis?

07 February 2021 3,635 3 View

Why Selenium nanoparticles synthesized by PEG 200 could not be scaled up ?

I could not synthesize Selenium nanoparticles by PEG 200 at up-scale ( more than 100 ml) as it got aggregated while at small amounts it works fine , I work with 850 PPM using selenium powder in...

08 January 2021 10,049 1 View

How to read forces from a file and apply them to a specified nodes in ANSYS APDL?

I want to apply different forces for every node. These force values are saved in .txt or .csv file. Can anybody help me to do that using APDL command. I attached Ansys input file for my model and...

15 November 2020 2,883 1 View

Which should be used for Anxiety : unselective beta blocker or B1 Blocker ?

which would be more effective in treatment or protection from Anxiety : unselective beta blocker as Propranolol or selective beta-1 adrenergic receptor antagonist as Bisoprolol ?

15 November 2020 7,994 2 View

How Abaqus can generate lumped mass matrix with non zero values only at the diagonal ?

Hi everybody I generated mass matrix by Abaqus, but it has nonzero off diagonal values. I need to get lumped mass matrix with nonzero values only at the diagonal. In Ansys I can turn Lump on...

28 October 2020 5,960 4 View

No title

I searched a lot for a generalized equation or an algorithm that can be implemented on MATLAB. However, all that I found still theoretical analysis. Can you help with the algorithm or the code for...

24 August 2020 8,117 7 View

How to know coationg efficiency of nanoparticles?

If I'm trying to coat ZnO nanoparticles with Silica, how to know how much of ZnO is coated? (coating efficiency)

29 July 2020 1,813 13 View

Does anyone have an article on different types of sampling ?

i need an article that explains in detail different types of sampling for the methodology part of my dissertation In my research, i am working on pre-service Science teachers in two universities....

29 June 2020 1,238 6 View

Extraction of CoA linked to Acyl chains?

I am in need for a protocol dedicated to the extraction of CoA-acyl chains from plant extracts.

17 May 2020 3,459 1 View

What species (or genus even) of crab is this (bivalve using hermit type)?

Two weeks ago I found a peculiar crab in the intertidal zone in SW Florida. when found, the crab was not utilizing a shell. It was similar shaped to porcelain crabs found in our area, but with...

17 January 2021 1,620 4 View

Can anyone tell me which species (or higher taxon) this is?

We found this small, maybe parasitic, crustacean in the North Sea offshore. The posterior body part is missing, but it looks quite characteristic. There is double-hooked rostrum, 2 antennae...

08 April 2020 6,842 9 View

Macrofauna-Can you tell me what species this is?

Can anyone identify this species? It's from a temperate lagoon located in the southern part of the Po River delta (Italy). Many thanks, Monia

03 March 2020 9,999 5 View

Anyone used "casting traps" to study the blue crab Callinectes sapidus?

Anyone has field experience on eficiency of using this type of casting traps (image attached) versus more "traditional" pots ? If applied to the blue crab, would be optimal. The idea would be to...

11 December 2019 5,478 6 View

Why can't I get target-specific sequences of Bryozoa in PCRs?

Hello, I am a PhD student interested in population genetics of marine invertebrates. Currently I'm working with a bryozoan: Reteporella. I have been trying to amplify COI (at least) and, although...

13 November 2019 7,387 4 View

Why can't I get target-specific sequences of Bryozoa in PCRs?

Hello, I am a PhD student interested in population genetics of marine invertebrates. Currently I'm working with a bryozoan: Reteporella. I have been trying to amplify COI (at least) and, although...

10 November 2019 2,188 4 View

Fossil Cladocerans? Dear Colleagues! My team is very interesting t look at them (at least images)...Do you have any fossil cladocerans to study?

For a long time we are looking for the fossil cladocerans (Crustacea: Branchiopoda: Cladocera). Many papers were published previously by my team. But now we are looking for the next fossils, i.e....

10 November 2019 3,678 2 View

How to differentiate living fron dead veligers?

I need to differentiate living veligers from dead. Is there some staining or another method? Thank you for your help in advance MAria

16 October 2019 6,080 7 View

Have any use the cyromazine like treatment for elasmobranchs?

In looking for a different treatment for small crustaceans that parasites sharks and rays

09 October 2019 2,898 1 View

How to differentiate living fron dead veligers?

I need to differentiate living veligers from dead. Is there some staining or another method? Thank you for your help in advance MAria

09 October 2019 9,798 6 View