TY - JOUR A1 - Päßler, Ulrich T1 - A Political Economy of Nature BT - Alexander von Humboldt's Essay on the Fluctuations in the Supplies of Gold JF - HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies N2 - In seinem Aufsatz „Ueber die Schwankungen der Goldproduktion mit Rücksicht auf staatswirthschaftliche Probleme“ (1838) entfaltet Alexander von Humboldt auf wenigen Seiten eine Weltgeschichte des Edelmetallverkehrs von der Antike bis ins 19. Jahrhundert. Der vorliegende Artikel geht Humboldts ökonomischem Denken als Teil seiner Forschungen zur Natur- und Menschheitsgeschichte nach. Er beginnt mit einem kurzen Abriss der von spätmerkantilistischen und frühliberalen Einflüssen geprägten Ausbildung Humboldts. Der Artikel diskutiert anschließend eine von Humboldt angefertigte Weltkarte sowie vier darauf bezogene Schaubilder, die historische und zeitgenössische statistische Daten zur graphischen Vision eines globalen Wirtschaftskreislaufs kombinieren. In einem weiteren Schritt geht der Artikel Humboldts Anwendung historischer und naturgeschichtlicher Forschungsmethoden auf dem Gebiet der politischen Ökonomie am Beispiel des Aufsatzes von 1838 nach. Den Schluss der Untersuchung bildet Humboldts Auseinandersetzung mit dem Edelmetall Platin, dessen begrenzte Verbreitung im Widerspruch zur Idee eines freien weltweiten Austauschs stand. N2 - Dans son mémoire « Sur la production de l’or considérée dans ses fluctuations » (1838), Alexandre de Humboldt développa une histoire universelle de la circulation des métaux précieux de l’antiquité jusqu’au XIXe siècle. Le présent article poursuit la pensée économique de Humboldt en la mettant dans le contexte de ses études physiques, naturelles et historiques. L’article commence par un abrégé de l’éducation professionnelle de Humboldt, qui était marquée par des influences caméralistes et libérales à la fois. Puis l’article commente une mappemonde et quatre diagrammes, dessinés par Humboldt; la combinaison des données statistiques historiques et contemporaines constitue la vision cartographique d’un circuit économique global. Dans un second temps, l’article aborde le mémoire de 1838 et analyse l’emploi des méthodes de recherche des sciences naturelles et historiques dans le domaine de l’économie politique. L’article se conclut par un examen des remarques de Humboldt sur le platine, un métal précieux qui en raison de sa répartition naturelle limitée était en contradiction avec l’idée d’un libre échange mondial. N2 - In his “Essay on the Fluctuations in the Supplies of Gold” (1838) Humboldt presents a global history of the flow of precious metals from antiquity to the 19th century. This paper traces Humboldt’s economic thinking within his natural and historical research, starting with an outline of his educational background which incorporated late mercantilist and early liberal influences. It then discusses a world map and four charts drawn by Humboldt, which combine historical and contemporary statistical data into a cartographical vision of a global economic circuit. In a next step, the article explores Humboldt’s application of natural and historical research methods in the field of political economy, using the example of his 1838 essay. Finally, the article addresses Humboldt’s discussion of platinum, a precious metal whose limited natural distribution contradicted the idea of free global exchange. KW - Wirtschaftgeschichte KW - Wissenschaftsgeschichte KW - Kameralismus KW - Bergbau KW - Edelmetalle KW - Gold KW - Silber KW - Platin Y1 - 2017 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-395781 SN - 1617-5239 SN - 2568-3543 VL - XVIII IS - 34 SP - 80 EP - 91 PB - Universitätsverlag Potsdam CY - Potsdam ER - TY - JOUR A1 - Schwarz, Ingo T1 - “Any American will always be welcome to the study of Alexander von Humboldt” BT - ein Besucher aus den Vereinigten Staaten von Amerika bei Alexander von Humboldt 1836 JF - HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies N2 - Im Jahr 1836 traf der US-amerikanische Geistliche und Sammler historischer Dokumente William B. Sprague (1795–1876) während seines zweiten Europabesuches auch mit Alexander von Humboldt in Berlin zusammen. Im Verlaufe des Gespräches zeigte sich Humboldt mit den politischen Entwicklungen in den Vereinigten Staaten bestens vertraut. Er kritisierte das Sklavensystem, räumte aber auch ein, dass er viele Aspekte der amerikanischen Demokratie bewunderte. N2 - During his second visit to Europe in 1836, the American clergyman and collector of historical documents William B. Sprague (1795–1876) met with Alexander von Humboldt in Berlin. In their conversation Humboldt showed himself to be very familiar with American political developments. He criticized slavery in the United States but also conceded that he admired many aspects of American democracy. N2 - El erudito estadounidense y coleccionista de documentos históricos William B. Sprague (1795–1876) se reunió con Alexander von Humboldt en Berlín durante su segunda visita a Europa en el año 1836. Durante su conversación, Humboldt se mostró muy bien informado de las corrientes políticas actuales de los EEUU. Criticó al sistema esclavista, pero también mostró admiración para muchos aspectos de la democracia norteamericana. KW - USA KW - Berlin KW - Sklaverei Y1 - 2017 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-395798 SN - 1617-5239 SN - 2568-3543 VL - XVIII IS - 34 SP - 92 EP - 95 PB - Universitätsverlag Potsdam CY - Potsdam ER - TY - JOUR A1 - Schwarz, Ingo T1 - Bernd Kölbel: Geologe und Alexander-von-Humboldt-Forscher JF - HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies N2 - Nachruf mit Bibliographie. KW - Geologie KW - Reisetagebücher KW - Geuns, Steven Jan van Y1 - 2017 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-395836 SN - 1617-5239 SN - 2568-3543 VL - XVIII IS - 34 SP - 167 EP - 170 PB - Universitätsverlag Potsdam CY - Potsdam ER - TY - JOUR A1 - Schwarz, Ingo T1 - Nachtrag zu HiN XVII, 33 (2016) JF - HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies KW - Herneck KW - Nachtrag Y1 - 2017 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-395824 SN - 1617-5239 SN - 2568-3543 VL - XVIII IS - 34 SP - 166 EP - 167 PB - Universitätsverlag Potsdam CY - Potsdam ER - TY - JOUR A1 - Werner, Petra T1 - Franz Julius Ferdinand Meyen: gefördert und frühvollendet BT - zwischen Poesie und totem Zoo JF - HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies N2 - Franz Ferdinand Julius Meyen (1804–1840) veröffentlichte auf sehr vielen Gebieten der Biologie wichtige Arbeiten, vor allem in Botanik und Zoologie. Mit Unterstützung Alexander von Humboldts gelang es ihm, auf dem Forschungsschiff „Prinzess Louise“ anzuheuern und als Schiffsarzt an einer mehrjährigen Weltreise teilzunehmen. Humboldt, der einige Regionen ebenfalls besucht und erforscht hatte, unterstützte seinen jungen Kollegen bei der Vorbereitung seiner Reise. Meyen veröffentlichte seine Reiseergebnisse bereits kurz nach seiner Rückkehr, gefördert von Christian Gottfried Nees von Esenbeck (1776–1858), sowohl als zweiteiligen historischen Reisebericht als auch in sieben Einzelabhandlungen. Einige Ergebnisse, die er, schwerkrank, nicht selbst verwerten konnte, übergab er noch bei Lebzeiten zur Bearbeitung an Spezialisten, andere wurden posthum von Mitgliedern der Leopoldina publiziert. Meyen brachte u. a. eine umfangreiche Sammlung an Vogelpräparaten mit, zu denen auch das Erstbeschreibungsexemplar des von ihm so genannten Spheniscus humboldti (Trivialname: Humboldt-Pinguin) gehört. N2 - Franz Ferdinand Julius Meyen (1804 –1840) publia des ouvrages majeurs dans plusieurs champs de biologie, notamment dans la botanique et la zoologie. Ses recherches ont été appréciées à l’époque même, l’admission à l’Académie Leopoldina en fait preuve. Grâce au soutien d’Alexander von Humboldt, Meyen parvint à prendre part au tour de tour de monde du bateau de recherche prussien « Prinzess Louise » en tant que médecin de bord. Ayant déjà exploré quelques-unes de ces régions lors de son voyage américain, Humboldt seconda Meyen dans la préparation de l’expédition. Meyen publia les résultats du voyage très peu de temps après son retour, avec le soutien de Gottfried Nees von Esenbeck (1776–1858). Il rédigea non seulement une relation historique du voyage, mais encore sept mémoires à part. Déjà gravement malade, Meyen remit des résultats encore inédits aux spécialistes dans les champs respectifs, autres découvertes furent publiées par membres de la Leopoldina. Meyen rapporta notamment une collection d’oiseaux très riche en nombre de spécimens, dont l’exemplaire de la première description de Spheniscus humboldti (nom commun : Manchot de Humboldt). N2 - Franz Ferdinand Julius Meyen (1804–1840) has published important results in several fields of biology, especially botany and zoology. By support of Alexander von Humboldt Meyen got the chance to accompany the expedition on the vessel „Princess Louise“ as a medical doctor. Alexander von Humboldt, who had visited many years before some of the areas gave him assistance during the preparation for the journey. Meyen published his results shortly after his return in a so called „historical report” on his travel what was published in two parts as well as in special articles. Some of his results he handed over to specialists, some of it has been reported post mortem by members of the Academy Leopoldina. Meyen brought an impressive collection of prepared birds to Berlin, including the type specimen of Spheniscus humboldtii (so called Humboldt-penguin). KW - Brillenpinguin KW - Humboldt-Pinguin KW - Förderung KW - Guanaco KW - Kulturpflanzen KW - Leopoldina KW - Mumien von Ureinwohnern Perus KW - Namensgebung für Humboldt-Pinguin KW - Naturkundemuseum zu Berlin KW - Pflanzengeographie KW - Reisetagebücher KW - Stiftung Preußische Seehandlung Y1 - 2017 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-395819 SN - 1617-5239 SN - 2568-3543 VL - XVIII IS - 34 SP - 147 EP - 164 PB - Universitätsverlag Potsdam CY - Potsdam ER - TY - JOUR A1 - Zimmermann, Heike Hildegard A1 - Raschke, Elena A1 - Epp, Laura Saskia A1 - Stoof-Leichsenring, Kathleen Rosemarie A1 - Schirrmeister, Lutz A1 - Schwamborn, Georg A1 - Herzschuh, Ulrike T1 - The history of tree and shrub taxa on Bol'shoy Lyakhovsky Island (New Siberian Archipelago) since the Last Interglacial Uncovered by Sedimentary Ancient DNA and Pollen Data JF - Genes N2 - Ecosystem boundaries, such as the Arctic-Boreal treeline, are strongly coupled with climate and were spatially highly dynamic during past glacial-interglacial cycles. Only a few studies cover vegetation changes since the last interglacial, as most of the former landscapes are inundated and difficult to access. Using pollen analysis and sedimentary ancient DNA (sedaDNA) metabarcoding, we reveal vegetation changes on Bol’shoy Lyakhovsky Island since the last interglacial from permafrost sediments. Last interglacial samples depict high levels of floral diversity with the presence of trees (Larix, Picea, Populus) and shrubs (Alnus, Betula, Ribes, Cornus, Saliceae) on the currently treeless island. After the Last Glacial Maximum, Larix re-colonised the island but disappeared along with most shrub taxa. This was probably caused by Holocene sea-level rise, which led to increased oceanic conditions on the island. Additionally, we applied two newly developed larch-specific chloroplast markers to evaluate their potential for tracking past population dynamics from environmental samples. The novel markers were successfully re-sequenced and exhibited two variants of each marker in last interglacial samples. SedaDNA can track vegetation changes as well as genetic changes across geographic space through time and can improve our understanding of past processes that shape modern patterns. KW - sedaDNA KW - metabarcoding KW - trnL KW - single-nucleotide polymorphism (SNP) KW - treeline KW - MIS 5 to 1 KW - permafrost deposits KW - radiocarbon ages KW - palaeoenvironment KW - Larix Y1 - 2017 U6 - https://doi.org/10.3390/genes8100273 SN - 2073-4425 VL - 8 IS - 10 SP - 273 PB - MDPI CY - Basel ER - TY - JOUR A1 - Bernacchioni, Caterina A1 - Ghini, Veronica A1 - Cencetti, Francesca A1 - Japtok, Lukasz A1 - Donati, Chiara A1 - Bruni, Paola A1 - Turano, Paola T1 - NMR metabolomics highlights sphingosine kinase-1 as a new molecular switch in the orchestration of aberrant metabolic phenotype in cancer cells JF - Molecular oncology / Federation of European Biochemical Societies N2 - Strong experimental evidence in animal and cellular models supports a pivotal role of sphingosine kinase-1 (SK1) in oncogenesis. In many human cancers, SK1 levels are upregulated and these increases are linked to poor prognosis in patients. Here, by employing untargeted NMR- based metabolomic profiling combined with functional validations, we report the crucial role of SK1 in the metabolic shift known as the Warburg effect in A2780 ovarian cancer cells. Indeed, expression of SK1 induced a high glycolytic rate, characterized by increased levels of lactate along with increased expression of the proton/monocarboxylate symporter MCT1, and decreased oxidative metabolism, associated with the accumulation of intermediates of the tricarboxylic acid cycle and reduction in CO2 production. Additionally, SK1-expressing cells displayed a significant increase in glucose uptake paralleled by GLUT3 transporter upregulation. The role of SK1 is not limited to the induction of aerobic glycolysis, affecting metabolic pathways that appear to support the biosynthesis of macromolecules. These findings highlight the role of SK1 signaling axis in cancer metabolic reprogramming, pointing out innovative strategies for cancer therapies. KW - NMR-based metabolomics KW - ovarian cancer KW - sphingosine kinase-1 KW - Warburg effect Y1 - 2017 U6 - https://doi.org/10.1002/1878-0261.12048 SN - 1878-0261 VL - 11 SP - 517 EP - 533 PB - Wiley CY - Hoboken ER - TY - JOUR A1 - Hintsche, Marius A1 - Waljor, Veronika A1 - Grossmann, Robert A1 - Kühn, Marco J. A1 - Thormann, Kai M. A1 - Peruani, Fernando A1 - Beta, Carsten T1 - A polar bundle of flagella can drive bacterial swimming by pushing, pulling, or coiling around the cell body JF - Scientific reports N2 - Bacteria swim in sequences of straight runs that are interrupted by turning events. They drive their swimming locomotion with the help of rotating helical flagella. Depending on the number of flagella and their arrangement across the cell body, different run-and-turn patterns can be observed. Here, we present fluorescence microscopy recordings showing that cells of the soil bacterium Pseudomonas putida that are decorated with a polar tuft of helical flagella, can alternate between two distinct swimming patterns. On the one hand, they can undergo a classical push-pull-push cycle that is well known from monopolarly flagellated bacteria but has not been reported for species with a polar bundle of multiple flagella. Alternatively, upon leaving the pulling mode, they can enter a third slow swimming phase, where they propel themselves with their helical bundle wrapped around the cell body. A theoretical estimate based on a random-walk model shows that the spreading of a population of swimmers is strongly enhanced when cycling through a sequence of pushing, pulling, and wrapped flagellar configurations as compared to the simple push-pull-push pattern. Y1 - 2017 U6 - https://doi.org/10.1038/s41598-017-16428-9 SN - 2045-2322 VL - 7 PB - Macmillan Publishers Limited, part of Springer Nature CY - London ER - TY - JOUR A1 - Frieler, Katja A1 - Schauberger, Bernhard A1 - Arneth, Almut A1 - Balkovic, Juraj A1 - Chryssanthacopoulos, James A1 - Deryng, Delphine A1 - Elliott, Joshua A1 - Folberth, Christian A1 - Khabarov, Nikolay A1 - Müller, Christoph A1 - Olin, Stefan A1 - Pugh, Thomas A. M. A1 - Schaphoff, Sibyll A1 - Schewe, Jacob A1 - Schmid, Erwin A1 - Warszawski, Lila A1 - Levermann, Anders T1 - Understanding the weather signal in national crop-yield variability JF - Earths future N2 - Year-to-year variations in crop yields can have major impacts on the livelihoods of subsistence farmers and may trigger significant global price fluctuations, with severe consequences for people in developing countries. Fluctuations can be induced by weather conditions, management decisions, weeds, diseases, and pests. Although an explicit quantification and deeper understanding of weather-induced crop-yield variability is essential for adaptation strategies, so far it has only been addressed by empirical models. Here, we provide conservative estimates of the fraction of reported national yield variabilities that can be attributed to weather by state-of-the-art, process-based crop model simulations. We find that observed weather variations can explain more than 50% of the variability in wheat yields in Australia, Canada, Spain, Hungary, and Romania. For maize, weather sensitivities exceed 50% in seven countries, including the United States. The explained variance exceeds 50% for rice in Japan and South Korea and for soy in Argentina. Avoiding water stress by simulating yields assuming full irrigation shows that water limitation is a major driver of the observed variations in most of these countries. Identifying the mechanisms leading to crop-yield fluctuations is not only fundamental for dampening fluctuations, but is also important in the context of the debate on the attribution of loss and damage to climate change. Since process-based crop models not only account for weather influences on crop yields, but also provide options to represent human-management measures, they could become essential tools for differentiating these drivers, and for exploring options to reduce future yield fluctuations. Y1 - 2017 U6 - https://doi.org/10.1002/2016EF000525 SN - 2328-4277 VL - 5 SP - 605 EP - 616 PB - Wiley CY - Hoboken ER - TY - JOUR A1 - Mahata, Khadak Singh A1 - Panday, Arnico Kumar A1 - Rupakheti, Maheswar A1 - Singh, Ashish A1 - Naja, Manish A1 - Lawrence, Mark T1 - Seasonal and diurnal variations in methane and carbon dioxide in the Kathmandu Valley in the foothills of the central Himalayas JF - Atmospheric Chemistry and Physics N2 - The SusKat-ABC (Sustainable Atmosphere for the Kathmandu Valley-Atmospheric Brown Clouds) international air pollution measurement campaign was carried out from December 2012 to June 2013 in the Kathmandu Valley and surrounding regions in Nepal. The Kathmandu Valley is a bowl-shaped basin with a severe air pollution problem. This paper reports measurements of two major greenhouse gases (GHGs), methane (CH4) and carbon dioxide (CO2), along with the pollutant CO, that began during the campaign and were extended for 1 year at the SusKat-ABC supersite in Bode, a semi-urban location in the Kathmandu Valley. Simultaneous measurements were also made during 2015 in Bode and a nearby rural site (Chanban) similar to 25 km (aerial distance) to the southwest of Bode on the other side of a tall ridge. The ambient mixing ratios of methane (CH4), carbon dioxide (CO2), water vapor, and carbon monoxide (CO) were measured with a cavity ring-down spectrometer (G2401; Picarro, USA) along with meteorological parameters for 1 year (March 2013-March 2014). These measurements are the first of their kind in the central Himalayan foothills. At Bode, the annual average mixing ratios of CO2 and CH4 were 419.3 (+/- 6.0) ppm and 2.192 (+/- 0.066) ppm, respectively. These values are higher than the levels observed at background sites such as Mauna Loa, USA (CO2: 396.8 +/- 2.0 ppm, CH4: 1.831 +/- 0.110 ppm) and Waliguan, China (CO2: 397.7 +/- 3.6 ppm, CH4: 1.879 +/- 0.009 ppm) during the same period and at other urban and semi-urban sites in the region, such as Ahmedabad and Shadnagar (India). They varied slightly across the seasons at Bode, with seasonal average CH4 mixing ratios of 2.157 (+/- 0.230) ppm in the pre-monsoon season, 2.199 (+/- 0.241) ppm in the monsoon, 2.210 (+/- 0.200) ppm in the post-monsoon, and 2.214 (+/- 0.209) ppm in the winter season. The average CO2 mixing ratios were 426.2 (+/- 25.5) ppm in the pre-monsoon, 413.5 (+/- 24.2) ppm in the monsoon, 417.3 (+/- 23.1) ppm in the postmonsoon, and 421.9 (+/- 20.3) ppm in the winter season. The maximum seasonal mean mixing ratio of CH4 in winter was only 0.057 ppm or 2.6% higher than the seasonal minimum during the pre-monsoon period, while CO2 was 12.8 ppm or 3.1% higher during the pre-monsoon period (seasonal maximum) than during the monsoon (seasonal minimum). On the other hand, the CO mixing ratio at Bode was 191% higher during the winter than during the monsoon season. The enhancement in CO2 mixing ratios during the pre-monsoon season is associated with additional CO2 emissions from forest fires and agro-residue burning in northern South Asia in addition to local emissions in the Kathmandu Valley. Published CO = CO2 ratios of different emission sources in Nepal and India were compared with the observed CO = CO2 ratios in this study. This comparison suggested that the major sources in the Kathmandu Valley were residential cooking and vehicle exhaust in all seasons except winter. In winter, brick kiln emissions were a major source. Simultaneous measurements in Bode and Chanban (15 July-3 October 2015) revealed that the mixing ratios of CO2, CH4, and CO were 3.8, 12, and 64% higher in Bode than Chanban. The Kathmandu Valley thus has significant emissions from local sources, which can also be attributed to its bowl-shaped geography that is conducive to pollution build-up. At Bode, all three gas species (CO2, CH4, and CO) showed strong diurnal patterns in their mixing ratios with a pronounced morning peak (ca. 08:00), a dip in the afternoon, and a gradual increase again through the night until the next morning. CH4 and CO at Chanban, however, did not show any noticeable diurnal variations. These measurements provide the first insights into the diurnal and seasonal variation in key greenhouse gases and air pollutants and their local and regional sources, which is important information for atmospheric research in the region. Y1 - 2017 U6 - https://doi.org/10.5194/acp-17-12573-2017 SN - 1680-7316 SN - 1680-7324 VL - 17 IS - 20 SP - 12573 EP - 12596 PB - Copernicus CY - Göttingen ER -