(Table 1) Pigments isolated from DSDP Leg 56 Holes

A relatively well documented record of intermediate and late chlorophyll diagenesis in marine sediments now exists. Intermediate diagenetic stages include conversion of chlorins to DPEP-series porphyrins and subsequent chelation with nickel, vanadyl, and, in special cases, copper. Increasing thermal stress leads to etio-series generation and transalkylation (Baker, 1969; Baker and Smith, 1975; Baker et al., 1977; Palmer and Baker, in press). In contrast, the early transformations of clorophyll are still largely unknown. Very early diagenetic reactions must certainly include loss of magnesium, deesterification, decarboxylation, reduction of ring-conjugating groups, and finally, oxidative-aromatization of carbons 7 and 8 in ring IV to yield free-base porphyrins (Baker and Smith, 1973; Smith and Baker, 1974). Chlorins (7,8-dihydroporphyrins) are very difficult to isolate and identify, because of hydrocarbon impurities which absorb in the blue to violet region of the electromagnetic spectrum and which co-chromatograph with the pigments. Further complications possibly can arise from artifact formation during isolation. In the present study, twelve DSDP Leg 56 core samples, ranging in sub-bottom depth from 4 to 420 meters and in age from Pleistocene to middle Miocene, were analyzed for tetrapyrrole pigments. Chlorins, in concentrations ranging from about 4 to less than 0.002 µg/g sediment, wet weight, were the only tetrapyrroles found. A carotenoid (tetraterpene) was isolated from Section 434-1-3.

Song without words, Op. 56 [music].

Mode of access: Internet.

Symphonie no. 3 : op. 56 /

Mode of access: Internet.

Finding aid for the records of the Michigan State Prison, Jackson, Michigan, 1839-1906 (Record group 56-27).

Includes bibliography.

Symph[onie] nr. 3, A moll. Op. 56.

Mode of access: Internet.

Baba-Yaga : tableau musical d'après un conte populaire russe, pour grand orchestre, op. 56. /

First ed.

Sonates pour orgue. No. 3, op. 56, in ut mineur.

Mode of access: Internet.

The definition of "small business" within the meaning of the Small business act of 1953 as amended. Interim report of Subcommittee No. 2 on Government Procurement, Disposal and Loan Activities to the Select Committee on Small Business, House of Representatives, Eighty-fifth Congress, second session, persuant to H. Res. 56 .

Mode of access: Internet.

Law-enforcement activities affecting small business : report of Subcommittee No. 1 on Law Enforcement and Subsidies Affecting Small Business, to the Select Committee on Small Business, House of Representatives, Eighty-fifth Congress, second session, pursuant to H. Res. 56 .

"Union calendar no. 1144."

Small-business problems in the aluminum industry; report of Subcommittee No. 3 on Minerals and Raw Materials, to the Select Committee on Small Business, House of Representatives, Eighty-fifth Congress, second session, pursuant to H. Res. 56.

Mode of access: Internet.

Dolly : op. 56, pour piano à 4 mains /

Pl. no.: 3678; 4045; 4046; 4047; 4059; 4074.

Baba Jaga : Tongemälde nach einem russischen Volksmärchen für grosses Orchester : op. 56 /

"Verschiedene Werke, no. 43"

Voces intimae : Quartett in D moll für 2 Violinen, Viola und Violoncello, op. 56 /

Publ. no.: Schlesinger No. 294.

Independent regulatory commissions. Report of the Special Subcommittee on Legislative Oversight of the Committee on Interstate and Foreign Commerce (pursuant to section 136 of the legislative reorganization act of 1946, Public Law 601, 79th congress, and house resolution 56, as amended, 86th congress)

January 3, 1961.