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The U.S. primarily uses chlorine gas, U.K. primarily uses ozone, for water sewage disinfection. My environmental chem textbook talks about the 2, as well as chlorine dioxide. Basically, using chlorine gas causes all kinds of small chemicals like chloroform and trihalomethanes as byproducts. But nobody talks about hydrogen peroxide as sewage disinfectant. It kills viruses and bacteria, and it eventually decomposes to water and oxygen. My gut reaction is... it must be really expensive? Also, is anyone from a country or municipality that uses disinfection other than chlorine or ozone? 67.165.185.178 ( talk) 02:39, 26 November 2021 (UTC).
Q1. It is possible to be poisoned to death, from drinking the milk of cows, that ate poisonous plants. Such is the example of the plant white snakeroot because it contains tremetol. This is how Abraham Lincoln's mother died. Are there any other examples? Basically, these plants must not be poisonous to cows.
Q2. Same question, but cases where the cow'w body digested the plant to no longer be poisonous in their cow milk.
Q3. It is possible to have a skin irritation just by standing under a poisonous tree when it rains. The only example I have is the manchineel tree, probably the most poisonous tree species in the world. But eating its fruit is a lot more toxic. Any other examples?
Q4. Most of the poisons are biological compounds, such as alkaloids, cardiac glycosides, neurotoxins, ribosome-inactivating proteins, and saponins. The infamous ricin falls under ribosome-inactivating proteins and the poison that killed Socrates, coniine, is an alkaloid. What are inorganic chemical examples, besides calcium oxalate? And coumarins. 67.165.185.178 ( talk) 02:46, 26 November 2021 (UTC).
After drawing File:Snake_cube_solution.svg, I found with a cursory search on Commons and Google that simple diagrams of cubes made by drawing two squares and joining corresponding vertices tend to slant left, as in above images.
Is there a psychological reason for this preference? (I can understand the preference for the viewpoint from above as gravity causes most things to be viewed from above.)
Thanks,
cmɢʟee⎆
τaʟκ
10:02, 26 November 2021 (UTC)
I'm interested in why the original poster calls that slanting left because I would describe them as pointing right.-- Khajidha ( talk) 18:14, 26 November 2021 (UTC)
If the easiest to notice proton in the human body decayed while a human with good [sense] was paying attention to [sense] what would they notice? Is this proton in the eyes or nervous system? Maybe in a rhodopsin molecule in a dark-adapted eye? What would be the detection mechanism? (Cherenkov radiation? A shower of descendant xyz particles similar to a cosmic ray in air? Direct nervous system stimulation somehow?) Sagittarian Milky Way ( talk) 18:00, 26 November 2021 (UTC)
Are there any official plans on how to curb the ongoing mutations of SARS-CoV-2? Particularly, does the emergence of a variant of concern entail some preventive measures or is it just another blah-blah term? 212.180.235.46 ( talk) 20:24, 26 November 2021 (UTC)
And, speaking of COVID variants, has the WHO said anything about how they intend to give them short names after they run out of Greek letters? -- 184.144.99.241 ( talk) 20:54, 26 November 2021 (UTC)
Science desk | ||
---|---|---|
< November 25 | << Oct | November | Dec >> | November 27 > |
Welcome to the Wikipedia Science Reference Desk Archives |
---|
The page you are currently viewing is a transcluded archive page. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages. |
The U.S. primarily uses chlorine gas, U.K. primarily uses ozone, for water sewage disinfection. My environmental chem textbook talks about the 2, as well as chlorine dioxide. Basically, using chlorine gas causes all kinds of small chemicals like chloroform and trihalomethanes as byproducts. But nobody talks about hydrogen peroxide as sewage disinfectant. It kills viruses and bacteria, and it eventually decomposes to water and oxygen. My gut reaction is... it must be really expensive? Also, is anyone from a country or municipality that uses disinfection other than chlorine or ozone? 67.165.185.178 ( talk) 02:39, 26 November 2021 (UTC).
Q1. It is possible to be poisoned to death, from drinking the milk of cows, that ate poisonous plants. Such is the example of the plant white snakeroot because it contains tremetol. This is how Abraham Lincoln's mother died. Are there any other examples? Basically, these plants must not be poisonous to cows.
Q2. Same question, but cases where the cow'w body digested the plant to no longer be poisonous in their cow milk.
Q3. It is possible to have a skin irritation just by standing under a poisonous tree when it rains. The only example I have is the manchineel tree, probably the most poisonous tree species in the world. But eating its fruit is a lot more toxic. Any other examples?
Q4. Most of the poisons are biological compounds, such as alkaloids, cardiac glycosides, neurotoxins, ribosome-inactivating proteins, and saponins. The infamous ricin falls under ribosome-inactivating proteins and the poison that killed Socrates, coniine, is an alkaloid. What are inorganic chemical examples, besides calcium oxalate? And coumarins. 67.165.185.178 ( talk) 02:46, 26 November 2021 (UTC).
After drawing File:Snake_cube_solution.svg, I found with a cursory search on Commons and Google that simple diagrams of cubes made by drawing two squares and joining corresponding vertices tend to slant left, as in above images.
Is there a psychological reason for this preference? (I can understand the preference for the viewpoint from above as gravity causes most things to be viewed from above.)
Thanks,
cmɢʟee⎆
τaʟκ
10:02, 26 November 2021 (UTC)
I'm interested in why the original poster calls that slanting left because I would describe them as pointing right.-- Khajidha ( talk) 18:14, 26 November 2021 (UTC)
If the easiest to notice proton in the human body decayed while a human with good [sense] was paying attention to [sense] what would they notice? Is this proton in the eyes or nervous system? Maybe in a rhodopsin molecule in a dark-adapted eye? What would be the detection mechanism? (Cherenkov radiation? A shower of descendant xyz particles similar to a cosmic ray in air? Direct nervous system stimulation somehow?) Sagittarian Milky Way ( talk) 18:00, 26 November 2021 (UTC)
Are there any official plans on how to curb the ongoing mutations of SARS-CoV-2? Particularly, does the emergence of a variant of concern entail some preventive measures or is it just another blah-blah term? 212.180.235.46 ( talk) 20:24, 26 November 2021 (UTC)
And, speaking of COVID variants, has the WHO said anything about how they intend to give them short names after they run out of Greek letters? -- 184.144.99.241 ( talk) 20:54, 26 November 2021 (UTC)