Recent comments in /f/askscience
rudbek-of-rudbek t1_j6expou wrote
Reply to comment by TRJF in Can you (roughly) determine the dosage of a drug taken based off of the blood concentration? by bynarie
So to get any sort of reliable number you would definitely need to know when the drug was ingested. Is this correct?
AquaSlothNC t1_j6exaet wrote
Reply to comment by The-fire-guy in Why can an adult’s GI tract expel C. botulinum spores while an infant can’t? by curiousnboredd
The bacterium can germinate in a beneficial environment with good growth conditions. If it germinates out of the spore in the stomach it may be able pass to the intestines (unclear). Or it may remain dormant and become active past the stomach.
Per the CDC -"Adult intestinal toxemia (also known as adult intestinal colonization) botulism is a very rare kind of botulism that can happen if the spores of the bacteria get into an adult’s intestines, grow, and produce the toxin (similar to infant botulism). Although we don’t know why people get this kind of botulism, people who have serious health conditions that affect the gut may be more likely to get sick."
I was trying to provide info of the bacteria in general as it pertains to infants and their digestive system and what pH conditions it can/cant grow in, so I thought it was helpful to look at the pH environment of the stomach too. Since we don't know exactly how adults get intestinal botulism I threw it in as additional info. Also, a lot of people don't know about botulinum spores and how pH plays a role so I thought I'd share.
Chagrinnish t1_j6ewyo4 wrote
With respect to apples the biggest influence would be the type of rootstock used. As another poster mentioned, commercial apple trees are propogated from small segments of branches (scions) from the desired cultivar which are then grafted onto the roots of another apple tree cultivar (the rootstock). The rootstock of the tree influences the mature size of the tree, and rootstocks selected for dwarfing characteristics generally produce a tree that fruits earlier than a full-size, "standard" tree.
In the plant kingdom in general plants usually don't flower until they start approaching their mature size. In that respect it makes sense that a dwarf tree will fruit earlier in its life than a taller tree.
[deleted] t1_j6evhky wrote
Reply to comment by teratogenic17 in Can you (roughly) determine the dosage of a drug taken based off of the blood concentration? by bynarie
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[deleted] t1_j6euy70 wrote
Reply to comment by The-fire-guy in Why can an adult’s GI tract expel C. botulinum spores while an infant can’t? by curiousnboredd
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squirrious t1_j6etypa wrote
Reply to comment by squirrious in What makes it difficult to determine whether nutrient deficiencies are implicated in mental-health issues like ADHD? by LinguisticsTurtle
Here's a study that found a potential link between vitamin D deficiency and ASD, unfortunately it's in Finnish but there's a summary in English: https://www.laakarilehti.fi/tieteessa/alkuperaistutkimukset/maahanmuuttajien-lapsilla-on-suomessa-paljon-vaikeita-autismikirjon-hairioita/
AquaSlothNC t1_j6etvjb wrote
Reply to comment by Halcyon_Rein in Why can an adult’s GI tract expel C. botulinum spores while an infant can’t? by curiousnboredd
Hi! So when Clostridium botulinum is in a harsh (example: acidic) environment it goes dormant and forms a spore to protect itself (sporulation). It will stay dormant in its spore-form until the surrounding environment is optimal for it to survive, become active (germinate), grow, and produce the neurotoxic protein. A Clostridium botulinum spore refers to the dormant state of the bacterium. Germination is when it comes out of dormancy and is not longer in its protective spore. Bacillus and Clostridium are two common spore forming bacteria. Hope that answered your question!
[deleted] t1_j6et6gb wrote
Reply to comment by Mammoth-Corner in Why can an adult’s GI tract expel C. botulinum spores while an infant can’t? by curiousnboredd
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Tratakaro t1_j6er2es wrote
Reply to comment by PopeBrendicus in Is there an upper limit to structure size in a vacuum? Could a sufficiently advanced civilisation build a galaxy sized structure in space or would it become too massive and collapse in on itself? by CubanHermes
Tbf, at that point, you might be able to just re-arrange atoms to be whatever you want.
[deleted] t1_j6epoki wrote
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[deleted] t1_j6eozrl wrote
Reply to comment by DaylightsStories in What sort of cancer prevention mechanisms are used by plants? by iKeyvier
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WordsNumbersAndStats t1_j6elcnl wrote
Reply to comment by [deleted] in Why can an adult’s GI tract expel C. botulinum spores while an infant can’t? by curiousnboredd
Adults taking proton pump inhibitors such as Omeprazole on a chronic basis to block gastric acid secretion are more susceptible to gastrointestinal infections.
shoktar t1_j6ekzim wrote
Reply to comment by bynarie in Can you (roughly) determine the dosage of a drug taken based off of the blood concentration? by bynarie
the problem is that people can have different genes for the expression of drug-metabolizing enzymes.
[deleted] t1_j6ekv25 wrote
Reply to comment by divariv in Can you (roughly) determine the dosage of a drug taken based off of the blood concentration? by bynarie
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[deleted] t1_j6eko43 wrote
Reply to comment by Cluefuljewel in Growing fruit trees from seed, what triggers fruiting? by HighRepsToHugeness
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teratogenic17 t1_j6ejw4s wrote
Reply to comment by [deleted] in Can you (roughly) determine the dosage of a drug taken based off of the blood concentration? by bynarie
I'd like to see some doctors turn from a punitive and sometimes deadly approach with Vicodin.
I have chronic nerve damage pain, and I had to pressure my otherwise sympathetic doctor, to remove the acetaminophen from my daily dosage.
If they had not done that, I would surely have died by now of liver and kidney failure, over the past decade.
[deleted] t1_j6ejllu wrote
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chocokittynyaa t1_j6ejjnm wrote
Reply to comment by [deleted] in Can you (roughly) determine the dosage of a drug taken based off of the blood concentration? by bynarie
Kidney/liver issues definitely, but also genetics can affect drug distribution and elimination for many medications (for example, loss or gain of function mutations in drug transporters).
r7-arr t1_j6exqzy wrote
Reply to comment by TheRedLob in Can you (roughly) determine the dosage of a drug taken based off of the blood concentration? by bynarie
Aren't you constrained by having tests for all the chemicals in the drug?