Ua loaʻa i kēia mau ʻike ʻano ʻē ka manaʻo o nā mea hoʻoponopono C&EN i kēia makahiki
na Krystal Vasquez
KA MEA POhihihi ʻo PEPTO-BISMOL
Hōʻaiʻē: Nat. Commun.
ʻO ke ʻano o Bismuth subsalicylate (Bi = poni; O = ʻulaʻula; C = hina)
I kēia makahiki, ua haki kahi hui o nā kānaka noiʻi mai ke Kulanui ʻo Stockholm i kahi mea pohihihi kenekulia: ke ʻano o ka bismuth subsalicylate, ka mea hana nui i loko o Pepto-Bismol (Nat. Commun. 2022, DOI: 10.1038/s41467-022-29566-0). Ma ka hoʻohana ʻana i ka diffraction electron, ua ʻike nā kānaka noiʻi ua hoʻonohonoho ʻia ka hui ma nā papa koʻokoʻo. Ma ke kikowaena o kēlā me kēia koʻokoʻo, hoʻololi nā anions oxygen ma waena o ke alapine ʻana i ʻekolu a me ʻehā mau cations bismuth. ʻO nā anions salicylate, i kēia manawa, e hoʻopili i ka bismuth ma o kā lākou mau hui carboxylic a i ʻole phenolic. Ma ka hoʻohana ʻana i nā ʻano hana microscopy electron, ua ʻike pū nā kānaka noiʻi i nā ʻano like ʻole o ka hoʻopaʻa ʻana o ka papa. Manaʻo lākou e wehewehe paha kēia hoʻonohonoho maʻamau i ke kumu i pale aku ai ke ʻano o ka bismuth subsalicylate i nā kānaka ʻepekema no ka manawa lōʻihi.
Hōʻaiʻē: Ma ka lokomaikaʻi o Roozbeh Jafari
Hiki i nā mea ʻike graphene i hoʻopili ʻia i ka lima mua ke hāʻawi i nā ana ʻana o ke koko mau.
Nā peʻa koko
No nā makahiki he 100 a ʻoi, ʻo ke kāohi ʻana i kou koko koko ke ʻano o ka ʻomi ʻana i kou lima me kahi cuff inflatable. Eia naʻe, ʻo kahi hemahema o kēia ʻano hana, ʻo ia ka hōʻike ʻana o kēlā me kēia ana i kahi kiʻi liʻiliʻi o ke olakino cardiovascular o ke kanaka. Akā i ka makahiki 2022, ua hana nā kānaka ʻepekema i kahi "peʻa" graphene manawa pōkole e hiki ke nānā mau i ke koko koko no kekahi mau hola i ka manawa (Nat. Nanotechnol. 2022, DOI: 10.1038/s41565-022-01145-w). Hana ka pūʻulu sensor carbon-based ma ka hoʻouna ʻana i nā au uila liʻiliʻi i loko o ka lima o ka mea e ʻaʻahu ana a me ka nānā ʻana i ke ʻano o ka loli o ke voltage i ka neʻe ʻana o ke au ma o nā ʻiʻo o ke kino. Pili kēia waiwai me nā loli i ka nui o ke koko, kahi algorithm kamepiula hiki ke unuhi i nā ana koko systolic a me diastolic. Wahi a kekahi o nā mea kākau o ke aʻo ʻana, ʻo Roozbeh Jafari o ke Kulanui ʻo Texas A&M, e hāʻawi ka hāmeʻa i nā kauka i kahi ala maʻalahi e nānā ai i ke olakino o ka puʻuwai o ka mea maʻi i nā wā lōʻihi. Hiki nō hoʻi iā ia ke kōkua i nā kauka lapaʻau e kānana i nā mea ʻē aʻe e hoʻopilikia ai i ke koko—e like me kahi kipa kaumaha i ke kauka.
NĀ RADICAL I HANA ʻIA E KE KANAKA
ʻAe: Mikal Schlosser/TU Denmark
Ua noho ʻehā mau limahana manawaleʻa i loko o kahi keʻena i kāohi ʻia e ke aniau i hiki ai i nā kānaka noiʻi ke aʻo pehea e hoʻopilikia ai ke kanaka i ka maikaʻi o ka ea o loko.
Ua ʻike nā kānaka ʻepekema he hopena nā huahana hoʻomaʻemaʻe, ka pena, a me nā mea hoʻomaʻemaʻe ea i ka maikaʻi o ka ea o loko. Ua ʻike nā kānaka noiʻi i kēia makahiki hiki i nā kānaka ke hana pū kekahi. Ma ke kau ʻana i ʻehā mau mea manawaleʻa i loko o kahi keʻena i kāohi ʻia e ke aniau, ua ʻike kahi hui e hiki i nā aila kūlohelohe ma ka ʻili o kānaka ke hana me ka ozone i ka lewa e hana i nā radical hydroxyl (OH) (Science 2022, DOI: 10.1126/science.abn0340). Ke hana ʻia, hiki i kēia mau radical reactive kiʻekiʻe ke hoʻopau i nā hui ea a hana i nā molekala hiki ke ʻino. ʻO ka ʻaila ʻili e komo ana i kēia mau hopena he squalene, kahi e hana ai me ka ozone e hana i ka 6-methyl-5-hepten-2-one (6-MHO). A laila hana ka Ozone me 6-MHO e hana i ka OH. Hoʻolālā nā kānaka noiʻi e kūkulu ma luna o kēia hana ma ka noiʻi ʻana pehea e ʻokoʻa ai nā pae o kēia mau radical hydroxyl i hana ʻia e ke kanaka ma lalo o nā kūlana kaiapuni like ʻole. I kēia manawa, ke manaʻolana nei lākou e hoʻihoʻi hou kēia mau ʻike i nā kānaka ʻepekema i ke ʻano o kā lākou loiloi ʻana i ka kemika o loko, ʻoiai ʻaʻole ʻike pinepine ʻia nā kānaka he kumu o nā hoʻokuʻu ʻana.
ʻEpekema Palekana no nā Frog
No ke aʻo ʻana i nā kemika e hoʻomake ai nā rana e pale aku iā lākou iho, pono nā kānaka noiʻi e lawe i nā laʻana ʻili mai nā holoholona. Akā, hoʻopōʻino pinepine nā ʻano laʻana o kēia manawa i kēia mau amphibians palupalu a koi aku paha i ka euthanasia. I ka makahiki 2022, ua hoʻomohala nā kānaka ʻepekema i kahi ʻano hana kanaka e laʻana ai i nā rana me ka hoʻohana ʻana i kahi mea i kapa ʻia ʻo MasSpec Pen, kahi e hoʻohana ai i kahi mea laʻana e like me ka peni e ʻohi i nā alkaloids i loaʻa ma ke kua o nā holoholona (ACS Meas. Sci. Au 2022, DOI: 10.1021/acsmeasuresciau.2c00035). Ua hana ʻia ka mea hana e Livia Eberlin, he chemist analytical ma ke Kulanui o Texas ma Austin. Ua manaʻo mua ʻia e kōkua i nā kauka ʻoki e hoʻokaʻawale ma waena o nā ʻiʻo olakino a me nā ʻiʻo kanesa i loko o ke kino kanaka, akā ua ʻike ʻo Eberlin hiki ke hoʻohana ʻia ka mea hana e aʻo ai i nā rana ma hope o kona hālāwai ʻana me Lauren O'Connell, he biologist ma ke Kulanui ʻo Stanford nāna e aʻo pehea e metabolize ai nā rana a hoʻokaʻawale i nā alkaloids.
Hōʻaiʻē: Livia Eberlin
Hiki i kahi peni spectrometry mass ke laʻana i ka ʻili o nā rana make me ka ʻole o ka hōʻeha ʻana i nā holoholona.
Loaʻa: Science/Zhenan Bao
Hiki i kahi electrode conductive a kīkoʻo ke ana i ka hana uila o nā ʻiʻo o ka heʻe.
Nā ELECTRODE Kūpono no ka heʻe
Hiki i ka hoʻolālā ʻana i ka bioelectronics ke lilo i haʻawina i ka hoʻokuʻikahi. Hoʻopaʻa pinepine nā polymers palupalu i ka hoʻomaikaʻi ʻana o ko lākou mau waiwai uila. Akā ua hana kahi hui o nā mea noiʻi i alakaʻi ʻia e Zhenan Bao o ke Kulanui ʻo Stanford i kahi electrode he stretchy a conductive, e hoʻohui ana i ka maikaʻi o nā ao ʻelua. ʻO ka pièce de résistance o ka electrode ʻo ia kona mau ʻāpana interlocking—ua hoʻonohonoho pono ʻia kēlā me kēia ʻāpana e conductive a malleable paha i ʻole e kūʻē i nā waiwai o kekahi. No ka hōʻike ʻana i kona hiki, ua hoʻohana ʻo Bao i ka electrode e hoʻoulu i nā neurons i loko o ke kumu lolo o nā ʻiole a ana i ka hana uila o nā ʻiʻo o ka heʻe. Ua hōʻike ʻo ia i nā hopena o nā hoʻokolohua ʻelua ma ka hālāwai Fall 2022 o ka American Chemical Society.
Lāʻau Pale Pōkā
Hōʻaiʻē: ACS Nano
Hiki i kēia kapa kila lāʻau ke pale aku i nā pōkā me ka pōʻino liʻiliʻi.
I kēia makahiki, ua hana kahi hui o nā kānaka noiʻi i alakaʻi ʻia e Huiqiao Li o ke Kulanui ʻEpekema a me ka ʻenehana ʻo Huazhong i kahi pale lāʻau ikaika e pale aku i kahi pana pōkā mai kahi revolver 9 mm (ACS Nano 2022, DOI: 10.1021/acsnano.1c10725). Loaʻa ka ikaika o ka lāʻau mai kona mau ʻāpana lignocellulose a me kahi polymer siloxane i hoʻopili ʻia. Kūʻē ka lignocellulose i ka haki ʻana mahalo i kona mau pilina hydrogen lua, hiki ke hana hou i ka wā e haki ai. I kēia manawa, lilo ka polymer pliable i mea paʻa i ka wā e paʻi ʻia ai. No ka hana ʻana i ka mea, ua huki ʻo Li i ka hoʻoikaika ʻana mai pirarucu, kahi iʻa ʻAmelika Hema me ka ʻili paʻa e kū i nā niho ʻoi loa o ka piranha. No ka mea, ʻoi aku ka māmā o ka pale lāʻau ma mua o nā mea ʻē aʻe e kūʻē i ka hopena, e like me ke kila, manaʻoʻiʻo nā kānaka noiʻi he hiki i ka lāʻau ke hoʻohana i ka pūʻali koa a me ka mokulele.
Ka manawa hoʻouna: Dec-19-2022