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54 views

Home made coronavirus vaccine: how much should E. coli be diluted before injection? [closed]

Theoretically I could clone out the NCoV spike sequence, express it in E. coli, thermally lyse the E. coli for 30 mins at 95 C, dilute the lysate in sterile saline, and inject. I just don't want to ...
0
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0answers
22 views

Cell type = gene expression spectrum?

I wonder if it is correct to say that the type of a cell is essentially its spectrum of expressed genes, i.e. the rates at which it produces specific proteins. As these rates may change (e.g. during ...
3
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1answer
63 views

Identify this tree?

I found this tree in Crete, Greece close to the sea, planted next to a building. Since I haven't seen this tree anywhere else in the island, I suppose it was planted by someone. Here are some pictures ...
2
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0answers
18 views

Why is the coremata of Creatonotos gangis huge?

This Australian moth has been some kind of curse image online due to its scent organs (coremata). It is inflated to attract mates. However, why does the coremata have to be inflated for it to work, ...
1
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1answer
28 views

What are these tiny insects?

I live in Italy (Emilia Romagna), and my house, seasonally in spring, is full of these guys, someone knows their name and if they could represent a problem? They are very tiny slightly less than 0,5 ...
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0answers
23 views

Are muscle building protein powders a waste of money? [closed]

This question remains unsolved, it's a multi-billion dollar question.
0
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0answers
10 views

what's the difference between cofactors and allosteric effectors?

"allosteric regulation (or allosteric control) is the regulation of an enzyme by binding an effector molecule at a site other than the enzyme's active site." does this imply that effector molecules ...
0
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0answers
27 views

Why are probionts not considered cellular life?

I am currently studying Prescott's Microbiology, 10th edition, by Willey, Sherwood, and Woolverton. Chapter 1.2 Microbes Have Evolved and Diversified for Billions of Years presents the following ...
0
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0answers
19 views

Can excessive ROS have any meaningful effect on nuclear DNA?

There seems to be no shortage of research that supports the reality of deleterious effects of excessive amounts of ROS in DNA such as altered DNA methylation patterns and on histone modifications. My ...
-1
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0answers
28 views

Is there a species (or sub-species if one needs further precision) of a plant, that can thrive in total darkness?

I would like to buy indoor plants to put them in a room which usually have a very low amount of natural and/or artificial light. I understand that such indoor plants are usually low-height (up to 1 ...
0
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1answer
43 views

How does new species come into existence?

The only reason for the creation of new species that I found from the internet is geographical isolation. Are there any more reasons?
0
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1answer
28 views

Is it possible to cultivate cheek epithelial cells in a non-CO2 incubator?

CO2 is important for maintaining constant pH in cell culture. Unfortunately, I do not have access to such incubator and buying a new one is expensive. I found a cheap incubator online, but it doesn't ...
0
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1answer
31 views

What type of insect is this found near Mountain View California?

This was taken in a hotel room in the Mountain View area of California. Size wise, it was pretty small, perhaps somewhere around an inch from left to right (not including antennae). My first instinct ...
0
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0answers
35 views

How is our blood pH kept constant while we exercise?

So this is a question worth 6 points. I currently have: 1. Chemoreceptors in the cartoid arteries, medulla oblongata, and aorta will detect a drop or increase in pH and will then stimulate the ...
1
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1answer
64 views

Whether de novo mutation can be inherited or not?

Think about the following scenario: A child is diagnosed as having long QT syndrome, an autosomal dominant disease. However, neither of his parents is affected. This may be due to a new mutation in ...
-1
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0answers
31 views

How much bigger are fat cells compared to red blood cells?

I am having a hard time comparing the size of different cells. I understand that cells vary greatly in size and shape. But I am trying to compare a red blood cell to a fat cell. From my research it ...
0
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1answer
25 views

Are facial 'cleansing' products 'effective' on human skin, and if so, what is their mechanism of action? [closed]

All major supermarkets and beauty stores stock some form of facial cleansing products. They come in the form of scrubs, gels, and lotions which vary in application (from in shower, to apply daily ...
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0answers
16 views

Oakland California spider in home

Found this critter this morning on a stack of clothes. About the diameter of a penny and in my haste to rehome it, took only this photo. The belly was golden brown.
1
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0answers
26 views

Can plasmodial slime molds be infected by virus?

According to the definition, plasmodial slime mold consist of a "single cell" with thousands of nuclei. How would such a unique type of cell response to viral infection (if any)? Google search yield ...
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0answers
24 views

How and when does the regeneration of cells that have died start?

I assume that the replacement of cells that have died (or been removed by any means) doesn't work on a single cell level but starts only when some critical number of cells have died. My question is: ...
-1
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0answers
39 views

How is the case fatality rate determined for epidemics?

The Wikipedia article on COVID-19 says the virus has a case fatality rate has been estimated at around 2% to 3%, but when I compare the number of fatalities to the number of infected people, I get a ...
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0answers
37 views

is there a way to accurately test the corona virus?

Chinese journalists have uncovered other cases of people testing negative six times before a seventh test confirmed they had the disease. from BBC:https://www.bbc.com/news/health-51491763
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0answers
42 views

corona viruse vs the Plasma Science (Mehran Tavakoli Keshe methode) [closed]

I have seen one video in telegram which is about weak the viruses energy, by this information: Reminders and practical advice to apply GaNS Using simple tools and materials from around the ...
-4
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0answers
28 views

Surviving inside an argon-flooded coffin for four days (Primer movie spoilers)

In the movie Primer, the character Abe needs to travel back in time four days. The time machines in the movie are basically coffins, and you need to stay inside them for the same amount of subjective ...
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0answers
30 views

Insect Identification (badly damaged corpse)

The photo is of the insect in question in a strainer. The body of the insect is just over half an inch long. I see a separated wing cover and leg in the photo as well. My location is New Hampshire, ...
0
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1answer
61 views

What is the size (diameter) of the SARS-CoV-2 virus?

You can easily find a lot of pictures of the SARS-CoV-2 virus. But although it should be trivial for an electron microscope to measure the size, I am not able to ...
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1answer
30 views

How to generate electrical current from biological decomposition

I'm working on a project to generate and store small amounts of electrical current by means of decaying organic matter and would like to know: a) Is it possible to generate electrical current from ...
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0answers
17 views

How do precordial leads measure electrical changes in the heart?

In precordial leads the electrodes from limbs are connected to a common point via resistors. What is the potential at the common point?
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0answers
36 views

How are cells that have died replaced by new ones?

I'd like to have a clearer picture how cells that have died are replaced by new ones. I assume the following: Normally, when a cell dies it will be replaced by a new one of the same type. It will be ...
0
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2answers
23 views

What could the etymology of Phallodriline be?

I'm reading about a series of gutless worms described in several papers as phallodrilines. A search in the World Register of Marine Species shows that there is a subfamily called "Phallodrilinae", but ...
0
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0answers
27 views

Ocean Acidification - The effect of CO2 concentration on the pH of the ocean [migrated]

I'm confused about how increased CO2 concentration in the atmosphere affects the pH of the ocean. The increase in CO2 concentration means the pH of the ocean will decrease (by several chemical rxns)....
0
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0answers
18 views

Which test can be used to diagnose typhoid fever

The only thing I found was the widal test, which is no longer an acceptable clinical method. I can't find much information about this anywhere else other than the test needs to analyze samples of ...
0
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2answers
78 views

Can the apparent drop in insect population be explained by local insects evolving to avoid traps?

In this widely reported Plos One article, it is stated that, after roughly 3 decades of placing Malaise traps in a set of predetermined locations (counting and replacing them regularly), a sharp ...
6
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1answer
80 views

Are there any animals that are unable to hear the human voice?

Humans and animals have different hearing ranges. The frequency range of a human, for example, is stated with 20 Hz to 20 kHz, whereas the fundamental voice frequency is stated with 125 Hz for men, ...
1
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1answer
32 views

How does high-intensity aerobic exercise affect the brain?

I have been reading articles claiming that serotonin, endorphins and BDNF are produced during exercise, but they never mention the intensity or duration of exercise for this to happen. To not make ...
1
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1answer
119 views

how the coronavirus was distinguished?

I have read a lot about the outbreak of the coronavirus, I know that in january scientists had already sequenced the viral genome. How was the virus identified prior to the sequencing Given that ...
2
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0answers
59 views

How many kingdoms are there actually?

I am wanting to learn (memorise) some of the tree of life; the classification of organisms. So I have come across a lot of kingdoms in my research. Basically, I don’t want to waste my time learning ...
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0answers
31 views

Do we dream with antipsychotics?

Antipsychotics are known to remove the hallucinations from our brain. But i release that while taking an antipsychotic, i don’t really dream... is that true ? Is it possble to not have paradoxical ...
-2
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0answers
23 views

How are parts of a virus used in creating a vaccine?

What is the process in using only parts of viruses such as proteins which can be recognized by the immune system such as in the case of the spike protein for Mers-CoV? I understand it is a method of ...
-2
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0answers
12 views

What are the mechanisms of tumor resistance to anti-neoplastic agents?

In addition to pumping out the drug, accumulating mutations and then evolving, e
1
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1answer
72 views

Expression of eukaryotic ribosomal DNA

The Wikipedia page for rDNA says "Ribosomal DNA (rDNA) is a DNA sequence that codes for ribosomal RNA" Also, the figure next to it says "The gene segment of eukaryotic rDNA contains 18S, 5.8S, and 28S ...
-1
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1answer
41 views

Is the backward positioning of photoreceptors bad design?

(Several questions have been asked about this topic but most are quite old and there has been at least one study since then that has attempted to answer this in a new way) Since photoreceptors are ...
-5
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1answer
47 views

DIY Biohacking? [closed]

I am a computer programmer, and while writing code is great for solving certain problems, programs easily become obsolete, and I want my input to humanity knowledge-base to be permanent. It might be a ...
2
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0answers
41 views

Why does constant current in electrophoresis mean that the molecule moves at the same rate?

Two part question: Part 1: I have always learned that when running a SDS-PAGE current is what decideds how fast the macro molecules migrate. However, if the force excerted on a molecule is equal ...
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0answers
20 views

What is a “putative plasmid”? Why wouldn't a genome sequence resolve if it is a plasmid or not?

Scitech Daily's Researchers Analyze Nasty Species of Bacteria That Has Colonized Space Station’s Water Dispenser says: The researchers conclude that the two bacterial species living within the ...
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0answers
14 views

Wood frog freezing/thawing cycle

Wood frogs are known for their ability to freeze. I understand that this is because ice crystals formation is prevented chemically, so the body won't get damaged by growing ice crystals. I assume ...
-3
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1answer
67 views

Is it possible to artificially induce a 40°C fever in a controlled and safe manner? [closed]

In search for any possible new treatments for COVID-19, I am of the understanding that the SARS-nCoV-2 virus may suffer deterioration at high temperatures and high humidity, to perhaps weaken it ...
0
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0answers
44 views

Research on chicken that cannot feel pain

In was having a conversation about the ethics of vegetarianism, and if it is right to cause pain to other animals. It is then that I stumbled upon the question, that if, just the way chicken and many ...
1
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1answer
36 views

In the PR segment of an ECG, how come there's no current flowing?

I don't really know how to phrase the question, but to put it as clearly as I can, I don't get why it is the P wave "flattens down" when the atria have completely depolarized. I get that the charge is ...
32
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9answers
11k views

If plants and trees *want* carbon dioxide, why is car traffic something bad?

This is going to sound really stupid or as a joke, but... Ever since I was a little kid, I have been confused about the following: Humans need air/oxygen to breathe in order to live. Plants/trees/...

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