Na 50 Nachlass Arthur Schopenhauer - 'Schopenhauer-Archiv', 204 - Antwortschreiben zur Frage der Bedeutung von Immanuel Kant

u.a.: Rücksprache mit Professor Schubert; Nachlass Immanuel Kant; Kritik an Hegel in "Der Wille in der Natur";

8° Hs 204 - Medizinische Sammelhandschrift

Vorbesitzer: Johann Ludwig Choulant; Senckenbergische Bibliothek Frankfurt am Main

Ms.Ff.F.Stoltze 3. 204 - Brief von Martin Ochs an Friedrich Stoltze

Bernhard Schnapper, Frankfurter Latern, Krebbelzeitungen, Nizza

Na 1 Nachlass Max Horkheimer, 577 - Korrespondenzen mit Friedrich (Frederick) Pollock (p. VI 32, 204-409)

1 Brief von Max Horkheimer an Edwin S. Bingham, 03.05.1942; 1 Brief von Frederick Pollock an A. P. Bersohn, 12.03.1942; 1 Brief von Austin P. Evans an Frederick Pollock, 26.02.1942; 1 Brief von Alice H. Maier an Max Horkheimer, 10.02.1942; 1 Brief von Franz Neumann an Frederick Pollock, 02.02.1942; 1 Brief von Frederick Pollock an Moritz Bonn, [1942];

Ausst. 204 - Beschreibu[n]g des heyligen Bischoffs Eusebij: der ain junger vn[d] discipel deß heyligen Sancti Hieronymi gewest ist zu dem Bischoff Damaso vn[d] dem Römer Theodosio von dem leben vn[d] sterben desselben heyligsten Hieronymi. Welche beschreybung sonnst Sannt Hieronymus geschefft oder Testament genannt wirdet mit vil gezierten götliche[n] vn[d] Cristenlichen leern vermenget durch ainen sondern liebhaber Sancti Hieronymi auß dem Latein in das tewtsch gezogen

Vorbesitzer: Heinrich Anton Cornill-d'Orville (Exlibris im Vorderdeckel)

Ms. lat. oct. 204 - La Cortona convertita

Vorbesitzer: Michelangelo Gualandi;

Biphytane and stable carbon isotopic values of sugars and glycerol from ODP Hole 204-1245D and 201-1229A

The membrane lipids diglycosyl-glycerol dibiphytanyl glycerol tetraethers (2G-GDGTs) in marine subsurface sediments are believed to originate from uncultivated benthic archaea, yet the production of 2G-GDGTs from subseafloor samples has not been demonstrated in vitro. In order to validate sedimentary biosynthesis of 2G-GDGTs, we performed a stable carbon isotope probing experiment on a subseafloor sample with six different 13C-labelled substrates (bicarbonate, methane, acetate, leucine, glucose and Spirulina platensis biomass). After 468 days of anoxic incubation, only glucose and S. platensis resulted in label uptake in lipid moieties of 2G-GDGTs, indicating incorporation of carbon from these organic substrates. The hydrophobic moieties of 2G-GDGTs showed minimal label incorporation, with up to 4 per mil 13C enrichment detected in crenarchaeol-derived tricyclic biphytane from the S. platensis-supplemented slurries. The 2G-GDGT-derived glucose or glycerol moieties also showed 13C incorporation (Dd13C = 18 - 38 per mil) in the incubations with glucose or S. platensis, consistent with a lipid salvage mechanism utilized by marine benthic archaea to produce new 2G-GDGTs. The production rates were nevertheless rather slow, even when labile organic matter was supplied. The 2G-GDGT turnover times of 1700 - 20 500 years were much longer than those estimated for subseafloor microbial communities, implying that sedimentary 2G-GDGTs as biomarkers of benthic archaea are cumulative records of past and present generations.