Zvakawanikwa izvi zvinoshamisa zvakabata pfungwa dzevapepeti veC&EN gore rino
by Krystal Vasquez
CHAKAVANZIKA CHEPEPTO-BISMOL
Chikwereti: Nat. Commun.
Maumbirwo eBismuth subsalicylate (Bi = pink; O = tsvuku; C = grey)
Gore rino, chikwata chevaongorori vanobva kuStockholm University chakaburitsa chakavanzika chezana remakore: chimiro chebismuth subsalicylate, chinhu chinoshanda muPepto-Bismol (Nat. Commun. 2022, DOI: 10.1038/s41467-022-29566-0). Vachishandisa electron diffraction, vaongorori vakaona kuti chinhu ichi chakarongwa muzvikamu zvakaita setsvimbo. Pakati petsvimbo yega yega, ma oxygen anions anochinjana pakati pekubatanidza ma bismuth cations matatu nemana. Ma salicylate anions, panguva iyi, anosangana ne bismuth kuburikidza nemapoka avo e carboxylic kana phenolic. Vachishandisa matekiniki e electron microscopy, vaongorori vakawanawo kusiyana kwe layer stacking. Vanotenda kuti kurongeka uku kwakakanganiswa kunogona kutsanangura kuti nei chimiro che bismuth subsalicylate chakakwanisa kudzivirira masayendisiti kwenguva yakareba kudaro.
Mufananidzo: Kubva kuna Roozbeh Jafari
Masensa eGraphene akasungirirwa paruoko rweruoko anogona kupa kuyerwa kweropa nguva dzose.
MATATO EKUDYIWA KWEROPA
Kwemakore anopfuura zana, kutarisa BP yako kwave kuchireva kuti ruoko rwako rwunodzvanywa nechinhu chinofefetera. Chimwe chakaipa cheiyi nzira ndechekuti chiyero chega chega chinomiririra mufananidzo mudiki wehutano hwemwoyo yemunhu. Asi muna 2022, masayendisiti akagadzira "tattoo" yenguva pfupi yegraphene inogona kugara ichitarisa BP kwemaawa akati wandei panguva imwe chete (Nat. Nanotechnol. 2022, DOI: 10.1038/s41565-022-01145-w). Iyo carbon-based sensor array inoshanda nekutumira magetsi madiki muruoko rwemunhu anopfeka uye kutarisa kuti voltage inochinja sei sezvo magetsi achifamba nepakati penyama yemuviri. Kukosha uku kunoenderana nekuchinja kwehuwandu hweropa, izvo algorithm yekombuta inogona kushandura kuita systolic uye diastolic blood pressure measurements. Sekureva kwemumwe wevanyori vechidzidzo ichi, Roozbeh Jafari weTexas A&M University, chishandiso ichi chaizopa vanachiremba nzira isina kuoneka yekutarisa hutano hwemwoyo wemurwere kwenguva yakareba. Zvinogonawo kubatsira vanachiremba kuti vabvise zvinhu zvisiri zvemuviri zvinokanganisa BP—sekuenda kuna chiremba kunoshungurudza.
ZVINHU ZVINONYANYA KUBVA KUVANHU
Credit: Mikal Schlosser/TU Denmark
Vazvipiri vana vakagara muimba inodzorwa nemamiriro ekunze kuitira kuti vaongorori vagone kudzidza kuti vanhu vanokanganisa sei hunhu hwemhepo iri mumba.
Masayendisiti anoziva kuti zvigadzirwa zvekuchenesa, pendi, uye zvinofefetedza mweya zvese zvinokanganisa kunaka kwemhepo yemumba. Vaongorori vakaona gore rino kuti vanhu vanogonawo. Nekuisa vanhu vana vanozvipira mukamuri rinodzorwa nemamiriro ekunze, timu yakawana kuti mafuta echisikigo paganda revanhu anogona kusangana ne ozone mumhepo kugadzira hydroxyl (OH) radicals (Science 2022, DOI: 10.1126/science.abn0340). Kana angoumbwa, aya ma radicals ane simba guru anogona kuoxida makemikari ari mumhepo uye kugadzira mamorekuru anogona kukuvadza. Mafuta eganda anobatanidzwa mukuita uku isqualene, iyo inobata ne ozone kugadzira 6-methyl-5-hepten-2-one (6-MHO). Ozone inobva yabatana ne6-MHO kuumba OH. Vaongorori vanoronga kuvaka pamusoro pebasa iri nekutsvaga kuti mazinga eaya ma hydroxyl radicals akagadzirwa nevanhu angasiyana sei mumamiriro akasiyana ezvakatipoteredza. Panguva ino, vanotarisira kuti izvi zvichaita kuti masayendisiti afunge patsva kuti vanoongorora sei kemikari yemumba, sezvo vanhu vasingawanzoonekwa semasosi emhepo.
SAYENZI YAKACHENGETEDZWA NEMATATA
Kuti vadzidze makemikari anouraya matatya kuti azvidzivirire, vaongorori vanofanirwa kutora sampuro dzeganda kubva kumhuka. Asi nzira dziripo dzekutora sampuro dzinowanzo kuvadza mhuka idzi dzine hutachiona kana kutoda euthanasia. Muna 2022, masayendisiti akagadzira nzira ine hunhu yekutora matatya achishandisa mudziyo unonzi MasSpec Pen, unoshandisa sampler yakaita sepeni kutora maalkaloids ari kumashure kwemhuka (ACS Meas. Sci. Au 2022, DOI: 10.1021/acsmeasuresciau.2c00035). Mudziyo uyu wakagadzirwa naLivia Eberlin, nyanzvi yemakemikari paYunivhesiti yeTexas kuAustin. Pakutanga wakagadzirirwa kubatsira vanachiremba kusiyanisa pakati penyama dzine hutano nedzekenza mumuviri wemunhu, asi Eberlin akaziva kuti mudziyo uyu unogona kushandiswa kudzidza matatya mushure mekunge asangana naLauren O'Connell, nyanzvi yezvebhayoloji paStanford University uyo anoongorora kuti matatya anogaya sei uye anobvisa sei maalkaloids.
Mufananidzo: Livia Eberlin
Chinyoreso chekuongorora ganda rematatya chine chepfu chinogona kuyera ganda rematatya ane chepfu pasina kukuvadza mhuka.
Credit: Science/Zhenan Bao
Electrode inotambanudzwa uye inofambisa mhepo inogona kuyera mashandiro emagetsi etsandanyama dzeoctopus.
MAELECTRODE AKAKODZERA PEDYO REMUKADZI
Kugadzira bioelectronics kunogona kuva chidzidzo chekubvumirana. Mapolymer anochinjika anowanzova akaomarara sezvo hunhu hwavo hwemagetsi huchivandudzika. Asi timu yevaongorori inotungamirwa naZhenan Bao weStanford University yakagadzira electrode inotambanudzwa uye inofambisa, ichibatanidza zvakanakisa zvenyika mbiri idzi. Chinhu chakakosha che electrode zvikamu zvayo zvinobatana—chikamu chimwe nechimwe chakagadziridzwa kuti chigone kufambisa kana kuchinjika kuitira kuti chisarwisa hunhu hwechimwe. Kuti aratidze kugona kwayo, Bao akashandisa electrode kukurudzira ma neuron muuropi hwembeva uye kuyera mashandiro emagetsi emhasuru dze octopus. Akaratidza mhedzisiro yemiedzo yese pamusangano weAmerican Chemical Society weFall 2022.
Huni Dzisingapindi Mabara
Chikwereti: ACS Nano
Nhumbi iyi yehuni inogona kudzinga mabara pasina kukuvara kwakanyanya.
Gore rino, chikwata chevaongorori chakatungamirwa neHuazhong University of Science and Technology's Huazhong University of Science and Technology chakagadzira nhumbi yekudzivirira pfuti yakasimba zvakakwana kuti ikwanise kudzivirira pfuti kubva papfuti ye9 mm revolver (ACS Nano 2022, DOI: 10.1021/acsnano.1c10725). Simba rehuni rinobva pamapepa ayo e lignocellulose uye siloxane polymer ine cross-linked. Lignocellulose inoramba kutyoka nekuda kwezvisungo zvayo zve hydrogen, izvo zvinogona kuumbwazve kana zvatyoka. Panguva iyi, polymer inochinjika inova yakasimba kana yarohwa. Kuti agadzire chinhu ichi, Li akawana kurudziro kubva kupirarucu, hove yekuSouth America ine ganda rakasimba zvakakwana kuti ikwanise kumira mazino epiranha akapinza serever. Nekuti nhumbi yekudzivirira pfuti yakareruka kupfuura zvimwe zvinhu zvisingakuvadzi pfuti, zvakaita sesimbi, vaongorori vanotenda kuti huni iyi inogona kushandiswa muhondo nendege.
Nguva yekutumira: Zvita-19-2022