{"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}
{"title":"Aufopfernd abgetaucht?","authors":"Deike Hatscher Hafrsfjord","doi":"10.1002/ciuz.202500013","DOIUrl":"https://doi.org/10.1002/ciuz.202500013","url":null,"abstract":"<p>Wissen Sie, aus welchem Metall die Elektroden bestehen und wie diese Bauteile heißen, die sich im Beispiel in Abbildung 1 so ritterlich auflösen anstatt des Schiffsrumpfes, welcher die Funktion der Kathode in dem Lokalelement mit dem Korrosionsschutz als Gegenelektrode und Meerwasser als Elektrolyt einnimmt?</p>","PeriodicalId":9911,"journal":{"name":"Chemie in Unserer Zeit","volume":"59 2","pages":"118"},"PeriodicalIF":0.9,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770476","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":"Forschung auf die Ohren","authors":"","doi":"10.1002/ciuz.202510003","DOIUrl":"https://doi.org/10.1002/ciuz.202510003","url":null,"abstract":"","PeriodicalId":9911,"journal":{"name":"Chemie in Unserer Zeit","volume":"59 2","pages":"117"},"PeriodicalIF":0.9,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770365","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":"Inhalt: Chemie in unserer Zeit 2/2025","authors":"","doi":"10.1002/ciuz.202570202","DOIUrl":"https://doi.org/10.1002/ciuz.202570202","url":null,"abstract":"","PeriodicalId":9911,"journal":{"name":"Chemie in Unserer Zeit","volume":"59 2","pages":"58-59"},"PeriodicalIF":0.9,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770364","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":"Ein komplexes Zusammenspiel: Bodenchemie und Klimawandel","authors":"Dieter Wöhrle","doi":"10.1002/ciuz.202400005","DOIUrl":"https://doi.org/10.1002/ciuz.202400005","url":null,"abstract":"<div>\u0000 \u0000 <p>Soil is a finite resource. It is therefore necessary to address the impact of climate change and other influences on various soils from forests, grasslands, agriculture and peatlands and what measures need to be taken to sustainably maintain soil quality. This concerns for example soil temperatures, the water cycle, drought, and pollutants in the soil. Measures against soil pollution are discussed. First of all, the article treats the technical fundamentels of soil formation with soil types, soil cover with soil horizons, soil chemistry with minerals and clay-humus complexes, soil ecology with organisms living in the soil. Brief reference is made to experiments on the subject of soil for pupils at different school levels.</p>\u0000 </div>","PeriodicalId":9911,"journal":{"name":"Chemie in Unserer Zeit","volume":"59 2","pages":"82-93"},"PeriodicalIF":0.9,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770606","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":"Fridays For Future und Schule? – Teil 4: Unterrichtsvorschläge zum Thema nachhaltige und gesunde Ernährung","authors":"Lars Otte, Sascha Hager, Marco Beeken","doi":"10.1002/ciuz.202300025","DOIUrl":"https://doi.org/10.1002/ciuz.202300025","url":null,"abstract":"<div>\u0000 \u0000 <p>The terms sustainability and healthy nutrition have become increasingly important in social discourse in recent years. These buzzwords are often associated with alternative diets such as vegetarian and vegan diets, which are particularly popular among adolescents and young adults. Meat substitutes represent a group of products that resemble or are supposed to resemble the sensory characteristics of meat but avoid the killing of animals or the use of animal products at all. The high relevance of this topic to everyday life and the future concerns young people in particular, and thus also students. For this purpose, experiments on the topic of sustainable and healthy nutrition were developed for secondary level II, in which the properties and ingredients of a conventional pork mortadella and a vegetarian and vegan substitute product are examined. In this paper, the experiments for determining the calorific value, salt content and detection reactions for various food additives are presented. By dealing with the ingredients of the products, curricular competences of the upper secondary school are promoted on the one hand, and on the other hand, a deeper understanding for a sustainable and healthy diet is created.</p>\u0000 </div>","PeriodicalId":9911,"journal":{"name":"Chemie in Unserer Zeit","volume":"59 2","pages":"94-107"},"PeriodicalIF":0.9,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770607","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":"Überfall auf Nervenzellen","authors":"Larissa Tetsch","doi":"10.1002/ciuz.202400042","DOIUrl":"https://doi.org/10.1002/ciuz.202400042","url":null,"abstract":"<p>Schwarze Witwen sind die einzigen in Europa vorkommenden Spinnen, deren Gift auch für Menschen gefährlich ist. Grund dafür ist das Neurotoxin α-Latrotoxin, das bei Menschen schwere Muskelkrämpfe auslösen kann, indem es für die unkontrollierte Ausschüttung von Neurotransmittern sorgt. Dafür bildet ein Komplex des Toxins einen Kanal in der Mem-bran von Nervenzellen.</p>","PeriodicalId":9911,"journal":{"name":"Chemie in Unserer Zeit","volume":"59 2","pages":"60-61"},"PeriodicalIF":0.9,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770262","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":"Verdrillte Wunder – Von Schlangensäule und Schneckenkönig","authors":"Dieter Sicker","doi":"10.1002/ciuz.202400007","DOIUrl":"https://doi.org/10.1002/ciuz.202400007","url":null,"abstract":"<p>Unsere Reise führt uns diesmal in die faszinierende Welt der Chiralität und ihrer vielfältigen Erscheinungsformen in Natur und Kultur. Im Mittelpunkt stehen die seltenen linksgewundenen Schnecken und wie ein Biologe versucht hat, dem Geheimnis ihrer Entstehung auf die Spur zu kommen.</p>","PeriodicalId":9911,"journal":{"name":"Chemie in Unserer Zeit","volume":"59 2","pages":"108-113"},"PeriodicalIF":0.9,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770263","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}
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