{"title":"Chemie Unterwegs: Schön und ganz schön tückisch – Oleander","authors":"Dieter Sicker","doi":"10.1002/ciuz.202500003","DOIUrl":"https://doi.org/10.1002/ciuz.202500003","url":null,"abstract":"<p>„Ach, haben die es schön hier!“ Haben Sie das nicht auch schon mal seufzend gedacht, bei einer Fahrt entlang einer mit blühenden Oleanderbüschen gesäumten Straße in Italien? Unsere Reise streift diesmal die Geschichte und Botanik dieser wunderschönen, aber auch tückischen Pflanze, um dann ganz einzutauchen in die Chemie ihrer Inhaltsstoffe und deren Wirkungen.</p>","PeriodicalId":9911,"journal":{"name":"Chemie in Unserer Zeit","volume":"59 3","pages":"165-171"},"PeriodicalIF":0.9,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144219928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Rätsel: Was sprang denn da nicht an?","authors":"Deike Hatscher","doi":"10.1002/ciuz.202500021","DOIUrl":"https://doi.org/10.1002/ciuz.202500021","url":null,"abstract":"<p>Wissen Sie, welche organische Namensreaktion hier gesucht wird, deren “Nichtanspringen” dazu geführt hat, dass selbiger Meilenstein der organischen Synthese auch nach fast fünfundzwanzig Jahren Abstinenz von organischer Chemie nicht vergessen wurde?</p>","PeriodicalId":9911,"journal":{"name":"Chemie in Unserer Zeit","volume":"59 3","pages":""},"PeriodicalIF":0.9,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144219927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Ozeanboden – Unerforschte Schnittstelle der Erde: Mikroben erleichtern Mineralisierung in der Tiefsee","authors":"Sylvia Feil","doi":"10.1002/ciuz.202500010","DOIUrl":"https://doi.org/10.1002/ciuz.202500010","url":null,"abstract":"<p>Aus kalten Quellen im Meeresboden tritt methanreiches Wasser aus. Dieses Methan wird zum Großteil von Mikroorganismen verstoffwechselt. Dies verhindert, dass das Gas in den Ozean und die Atmosphäre entweichen und zur Klimaerwärmung beitragen kann. Dieser Prozess des mikrobiellen Methanverbrauchs führt auch zur Bildung von Carbonatgesteinen in den Sedimenten des Meeresbodens, wobei der Kohlenstoff des Methans direkt als Feststoff in den Gesteinen gebunden wird. So gelangt der Kohlenstoff in die Geosphäre, wo er lange gespeichert ist.</p>","PeriodicalId":9911,"journal":{"name":"Chemie in Unserer Zeit","volume":"59 3","pages":"129-131"},"PeriodicalIF":0.9,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144220127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Vorschau auf Heft 4/2025","authors":"","doi":"10.1002/ciuz.202570303","DOIUrl":"https://doi.org/10.1002/ciuz.202570303","url":null,"abstract":"","PeriodicalId":9911,"journal":{"name":"Chemie in Unserer Zeit","volume":"59 3","pages":""},"PeriodicalIF":0.9,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ciuz.202570303","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144219929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Aufgaben des Schülerwettbewerbs Chemie – Die Stimmt!: Die Dosis macht das Gift","authors":"Frederike Saal, Jonas Florian Wunsch","doi":"10.1002/ciuz.202500011","DOIUrl":"https://doi.org/10.1002/ciuz.202500011","url":null,"abstract":"<p>Schokolade zählt zu den beliebtesten Genussmitteln weltweit. Auch wird ihr ein positiver Effekt auf die Psyche zugeschrieben. Warum der Schokoladenkonsum bei Hunden allerdings oft in einer Frage um Leben und Tod mündet, zeigt die folgende Aufgabe.</p>","PeriodicalId":9911,"journal":{"name":"Chemie in Unserer Zeit","volume":"59 3","pages":"172-173"},"PeriodicalIF":0.9,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144220267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Qual der Wahl: Synthesemethoden für anorganische Materialien, am Beispiel SiO2","authors":"Ulrich Schubert","doi":"10.1002/ciuz.202400027","DOIUrl":"https://doi.org/10.1002/ciuz.202400027","url":null,"abstract":"<div>\u0000 \u0000 <p>The spectrum of properties and thus possible applications of inorganic solids not only depend on their chemical composition, but also on their structure on all length scales. Specific synthesis methods must be employed depending on the question whether crystalline or amorphous, dense or porous, nano- or macroscale morphologies result in the anticipated properties and whether powders, monoliths or thin films are to be prepared. To this end, different starting compounds are frequently necessary. The mutual relation between synthesis, properties and structure is demonstrated using the example of SiO<sub>2</sub>.</p>\u0000 </div>","PeriodicalId":9911,"journal":{"name":"Chemie in Unserer Zeit","volume":"59 3","pages":"158-164"},"PeriodicalIF":0.9,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144220323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Biogene Phosphonate: Methan-Emission durch mikrobielle Phosphorgewinnung","authors":"Annette Hille-Rehfeld","doi":"10.1002/ciuz.202410013","DOIUrl":"https://doi.org/10.1002/ciuz.202410013","url":null,"abstract":"<p>In nährstoffarmen Gewässern gewährleistet das Recycling organischer Substanz die Versorgung der Planktonorganismen mit Phosphor. Dass dabei in großem Stil Methan als Nebenprodukt entsteht, weckte das Interesse an den biogenen Phosphonaten. Diese bislang wenig beachtete Substanzklasse zeigt unerwartete Vielfalt und ungewöhnliche Biochemie.</p>","PeriodicalId":9911,"journal":{"name":"Chemie in Unserer Zeit","volume":"59 3","pages":"126-128"},"PeriodicalIF":0.9,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144219959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Chemische Tricks der Tiere und Pflanzen: Doppelt hält besser","authors":"Larissa Tetsch","doi":"10.1002/ciuz.202400046","DOIUrl":"https://doi.org/10.1002/ciuz.202400046","url":null,"abstract":"<p>Glyphosat hemmt ein Enzym, das eine wichtige Rolle bei der Synthese aromatischer Aminosäuren spielt. Während das Herbizid die meisten Gefäßpflanzen tötet, sind Moose auffallend resistent. Neue Untersuchungen zeigen, dass dafür ein Erbe vom Bakterienvorfahren der Chloroplasten verantwortlich ist.</p>","PeriodicalId":9911,"journal":{"name":"Chemie in Unserer Zeit","volume":"59 3","pages":"124-125"},"PeriodicalIF":0.9,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144219960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Metallurgie in der Bronzezeit","authors":"","doi":"10.1002/ciuz.202570201","DOIUrl":"https://doi.org/10.1002/ciuz.202570201","url":null,"abstract":"<p><b>Schmiedehandwerk in der Bronzezeit</b></p><p>Die mehr als 3.600 Jahre alte Himmelsscheibe von Nebra ist ein Fund von Weltrang und seit 2013 Bestandteil des UNESCO „Memory of the World“. Noch nicht restlos geklärt war die Frage nach der Herstellungstechnik. Aufgrund von Materialzusammensetzung und früheren Untersuchungen war bekannt, dass die Scheibe in ihrer endgültigen Größe nicht einfach gegossen worden sein konnte. Metallografische Analysen zeigen nun, dass die Himmelsscheibe in einem aufwendigen Warmschmiedeprozess hergestellt wurde. Bis sie ihre endgültigen Ausmaße erreichte, waren ungefähr zehn Zyklen nötig, die jeweils ein Erhitzen bis auf ca. 700 °C, Ausschmieden und Glühen umfassten, um das Metallgefüge wieder zu entspannen.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":9911,"journal":{"name":"Chemie in Unserer Zeit","volume":"59 2","pages":"57"},"PeriodicalIF":0.9,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ciuz.202570201","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Vorschau auf Heft 3/25","authors":"","doi":"10.1002/ciuz.202570203","DOIUrl":"https://doi.org/10.1002/ciuz.202570203","url":null,"abstract":"","PeriodicalId":9911,"journal":{"name":"Chemie in Unserer Zeit","volume":"59 2","pages":"119"},"PeriodicalIF":0.9,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ciuz.202570203","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}