Science topic

Decapodiformes - Science topic

A superorder of CEPHALOPODS comprised of squid, cuttlefish, and their relatives. Their distinguishing feature is the modification of their fourth pair of arms into tentacles, resulting in 10 limbs.
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How are large species such as sperm whales or giant squid affected?
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Thank you Abhijit Mitra for copying and pasting your answer directly from the NOAA website: https://oceanexplorer.noaa.gov/facts/animal-pressure.html
Very unprofessional.
Large marine species are affected in different ways depending on whether they have gas-filled spaces in their bodies or not. Sperm whales, for example, dive with lung fulls of air which become compressed as they dive deeper. While they are physiologically adapted to deep diving, the degree of hydrostatic pressure will dictate the length of time they can stay down for. Increasing hydrostatic pressure drives nitrogen from the air in their lungs into their body tissues and so they must then surface slowly to allow the gas to dissipate slowly to avoid tissue damage (especially in the bones). The effect of hydrostatic pressure on sperm whales can therefore be both physical and behavioural.
In species that do not have gas-filled body cavities - like the giant squid - there are no such physical or behavioural restrictions from hydrostatic pressure. Because these species are composed mostly of water, and water will not compress under pressure, they can move freely up and down the water column. For these species hydrostatic pressure can be important in maintaining body form, structure and movement, especially in large invertebrates which lack either an internal or external skeletal structure.
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how can the RSJ (Resistive shunted junction) model be fit to the experimental data of micron-sized (l=10,w=100) SQUID junction made up of SS'S type weak link?
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Yes!! sure.
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I am synthesizing NdFeB/FeCo exchange coupling magnetic nanoparticles using sol-gel method. I want to check Henkel plot to know the interaction between the hard and soft phase. I would like to know if the Henkel plot can be derived from the M-H curve or if not, how can I check the Henkel plot using PPMS (or SQUID, VSM,...)?
Thank you very much in advance. Any suggestions are highly appreciated.
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Up
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I found that my squid, cuttlefish and octopus sequences all have multiple stop codons in all-over places in the sequence. I prepared them by means of Sanger methods for COI 1 barcoding. Could anyone please explain, please. Thanks.
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Hello, how have you been able to get around this? Thanks Norma Afiati
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I am interesting in the SQUID coupled to the nanomagnet. It has been already shown [1] that the SQUID feels the nanomagnet nicely, but otherwise the nanomagnet does not feel SQUID, because it produces too small magnetic fields.
If I can increase the influence of the fields made by SQUID to the nanomagnet, I probably can find some interesting dynamical regimes in this system.
[1] M. J. Martínez-Pérez, B. Müller, D. Schwebius, D. Korinski, R. Kleiner, J. Sesé, D. Koelle
NanoSQUID magnetometry of individual cobalt nanoparticles grown by focused electron beam induced deposition, Supercond. Sci. Technol., 30, 024003 (2017).
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You welcome
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my particles are typically made on Mica, I was wondering if mica or even glass can be used for such measurements.
also for SQUID and VSM could the sample be in liquid phase? if so how the sample is gotten prepared?
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I did Cu/Co measurement in SQUID at 10K. I saw sudden increase in magnetic moment for field range of -10000 Oe to 10000 Oe.May I know the reason? This is observed only at low temperature. For better understanding please look at the image attached. #SQUID #magnetism
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C K Gomathy Thank you.
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What kind of glue can be used for mounting the samples in SQUID magnetometer to work above 400 K and giving minimal or marginally small magnetic signal?
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You can use Zircar cement ( ACA5) for high temperature application in SQUID. The cement is water soluble and can be removed easily. You can get more details from the application note of QD on VSM sample mounting. (https://www.qdusa.com/sitedocs/appNotes/ppms/1096-306.pdf). Hope it will help.
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Dear all,
I am trying to optimize a collagen obtaining process from squid as raw material. We already study the effect of time, temperature and acid concentration.
We are using CH3COOH for an acid extraction for 36 h.
Te complete process is in first intance a washing with ethanol and afterwards a non-collagen proteins precipitation with NaOH.
After, the acid extraction it is neccesarily the neutralization of the solution and the precipitation of collagen (the titration was made with NaOH). The next step it is a centifugation step and a lyophilization. However, my yield it is not complete real because I am dragging Na as salt. However, the precipitate it is not complete powder is more like a gel, so If I try to wash it I lost a lot of sample and my yields only reach 3%.
Do you have any advice to help me to avoid this consequence and obtain a better purity in the collagen?
Thank you very much in advance!!
Romina
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Thank you very much for all your advices!!
I will try it!!