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sangui

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About sangui

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    Quark

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    france
  • Favorite Area of Science
    biology

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  1. I must be wrong somewhere because I found this. My B=D/C=0.13257072 ANd in my correction : Bartlett’s K-squared =0.305 bertlett.xlsx
  2. Thanks Is it possible than D is negative ? I don't understand why do we use the sum for C, we don't have anything to sum ? ∑i=1,2,3
  3. Stupid question but : what is frac ?
  4. We must see if all entries follow the same normal distribution. And it's the same for the second table. I don't think those table are related (but I'm not sure, I just have the exercice and the value of Shapiro for the first and Bartlett for the second). I'm sorry to don't be more precise but, I haven't a lot of information (I need to understand this test for the following of my study, but my teacher choose to don't work on it). Thank you for your help.
  5. It's my fault I haven't been clear. I'm suppose to learn how to use those test, and my teacher doesn't gave me more information. So, I don't really know the difference.
  6. Actually, it's exactly why I need to understand those test ^^
  7. For example I have to look if those sample follow a normal distribution. Temperature_1 Temperature_2 Temperature_3 Temperature_4 Temperature_5 2.56 2.28 2.73 2.44 2.54 2.92 2.78 2.97 2.81 2.67 2.00 2.74 2.00 2.08 2.43 2.83 2.47 2.13 2.90 2.10 2.61 2.52 2.09 3.05 2.78 3.10 2.16 1.90 2.69 2.85 2.42 2.70 3.04 3.03 2.76 2.28 2.70 2.57 2.91 2.47 I'm suppose to use shapiro-wilk . On this one I need to find if the variance are equal. Temperature_1 Temperature_2 Temperature_3 2.42 3.05 1.95 2.83 2.21 2.23 2.25 2.18 2.54 3.02 2.35 2.56 I think I must use Bartlett.
  8. Hi, I have to do some statistic, and I don't understand how works the shapiro-wilk test or the barltett test. I think I understand why do we use it (to see if an sample follow a normal distribution for shapiro and see if our vaiance are equal for Bartlett). But I am completely unable to do the math, can somebody help me ? Thanks
  9. My question may look weird but : Doesn't Italy have a really different death ratio than China ? And if it's true, doesn't it mean than China may have cover some death ?
  10. Thanks for your reply ^^. Your link answer my questions.
  11. Yes, but they show than we have free mitochondria are present even in physiological state. So it must be usefull in another way, no ?
  12. We don't have the same immune system (the proportion of Ig are different, cytokine ....) I found a paper about H.pylori (it's a bacteria but ... it can be extrapolated for virus). https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4606101/pdf/JIR2015-315957.pdf
  13. I'm not sure they are minor risk to catching it (and so to transmitting it), but clearly they have less chance to have severe symptom. (but this article may explain a bit of the low transmission rate for the children: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7102573/pdf/main.pdf , or those one explain than children just have less severe symptom https://onlinelibrary.wiley.com/doi/full/10.1111/apa.15271 or https://onlinelibrary.wiley.com/doi/full/10.1111/apa.15270) However the problem of allowing infection of the youngest people (if we forget politic or ethic) is than youngest people still be a good vector to transmit to the more fragil people.
  14. I found an article about free mitochondria in the blood, and it's puzzle me. The link of the article : https://faseb.onlinelibrary.wiley.com/doi/epdf/10.1096/fj.201901917RR I found the article rather good with a good explanation of the MATERIALS AND METHODS (even if I don't understand everything). But I have some lack of understanding : - Does it the first time than we found free mitochondria in animal organism ? - Why do we need the ability to produce ATP outside of the cells ? - It may be a processus to modulate the immune system (I read than mitochondria can act like DAMPs), but how do we avoid a reaction of inflammation a basal level ? Thanks for reading
  15. I like this idea: it's close to the phage therapy (wich is one of the funniest ways to fight an infection ever ^^). However, I 'm pretty sure it would not work. 1 One of the biggest antibiotic resistance problems is the ability to be delivered by a plasmid. Our sensitive strain would have those plasmid and become resistant really soon. So we would get back in the original solution. 2 Place like hospitals NEED to be clean up often. If we had some strain (even really sensitive) it would kill a lot of people (Antibiotic doesn't cure every desease : resistance or not). 3 Instability: bacteria mutate, really often and it becomes a kind of a time bomb (some day it will be dangerous, and if you have more bacteria this day will come sooner.).
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