Porphyra

M[pz(A4)] A = S2ML2. The octakis(.V-R)porphyra/,ines reported by Schramm and Hoffman (2), M[pz(S-R)8 (M = Ni, Cu), (60), can be converted to the octathiolate M[pz(S )g] (Scheme 11) via reductive cleavage of the sulfur-carbon bond when R = benzyl (Bn), and this tetra-bis(dithiolate) can then be peripherally capped with metal-ligand systems to yield peripherally tetrametalated star porphyrazines. The benzyl dinitrile 57 can be macrocyclized around magnesium butoxide to form [Mg[pz(S-Bn)8] (58) (35-40%), which can then be demetalated with trifluoroacetic acid to form 59 (90%), which is subsequently remetalated with nickel or copper acetate to form 60a (95%) and 60b (70%) (Scheme 11) (3, 23, 24). Deprotection of 60a or 60b with sodium in ammonia yields the Ni or Cu tetra-enedithiolates, 61a or 61b to which addition of di-ferf-butyl or n-butyl tin dinitrate produces the peripherally metalated star porphyrazines 62a (37%), 62b (80%), and 62c (41%). 

Agar Cell walls of agarophyte red algae Sulfated agars and porphyran-agaroid from Porphyra spp. 

Asamizu E, Nakajima M, Kitade Y, SagaN, Nakamura Y, Tabata S (2003) Comparison of RNA expression profiles between the two generations of Porphyra yezoensis (Rhodophyta), based on Expressed Sequence Tag frequency analysis. J Phycol 39 923-930... 

Toth GB, Pavia H (2000) Water-borne cues induce chemical defense in a marine algaAscophyllum nodosum. Proc Natl Acad Sci USA 97 14418-14420 Uppalapaati SR, Fujita Y (2000) Carbohydrate regulation of attachment, encystment, and appres-sorium formation by Pythium porphyrae (Oomycota) zoospores on Porphyra yezoensis (Rhodophyta). J Phycol 36 359-366... 

Conde FR, Churio MS, Previtali CM (2000) The photoprotector mechanism of mycosporine-like amino acids. Excited-state properties and photostability of porphyra-334 in aqueous solution. J Photochem Photobiol 56B 139-144... 

Korbee N, JJuovinen P, Figueroa FL, Aguilera J, Karsten U (2005) Availability of ammonium influences photosynthesis and the accumulation of MAAs in two Porphyra species (Bangiales, Rhodophyta). Mar Biol 146 645-654... 

In the present work, our aim has been prepared to different peripheral porphyra-zines which include eight 3-methylbutan and 3-phenylpropyl groups. Peripherally-functionalized porphyrazines have the potential to exhibit novel optical, magnetic and electronic properties [3],... 

The synthetic route to metals porphyrazines requires the preparation of porphyra-zine core at the beginning. The starting material of porphyrazine was disodium salt of dithiomaleonitiile which was obtained from the reaction of carbondisulfide with sodiumcyanide in two steps. The results of IR spectrum and melting point (290°C) of compound supported the stmcture we aimed. 

The galactan known as Nori, isolated from Porphyra ladniata, resembles agar in that it contains L-galactose D-mannose is also a component of the polysaccharide. 

The culture of edible seaweeds has a long tradition in the East. Particularly the red Porphyra tenera Kjelliman is the object of a large trade owing to a larger content of proteins, with a better balance of amino acids relevant to the human diet, than most other seaweeds. Certain marine... 

These are rarely found free but occur as a common prosthetic group of proteins. The first such protein to be extensively studied was the iron porphyrin (Greek porphyra, purple) haemoglobin. This and other iron-porphyrin proteins play a vital role in the physiological activity of nearly all forms of life.146 These forms have the same basic structure (39) but differ in the nature of the pyrrole substituents these are shown for the major porphyrins in Table 13. It has become common practice to refer to all the iron-porphyrin proteins as haem proteins. The function of haemoglobin is, of... 

Three highly purified preparations catalyzing the deamination of ATP, ADP, and AMP have been isolated from Porphyra crispata (red marine alga) 182), Microsporum audouini (188), and De ulfovibrio desulfuri-cans (grown anaerobically) (184). 

Porphyra-334 (mytilin B) PR Ci4H22N208 346 334 4230086 Porphyra tenera86 Mytilus galloprovincialis ... 

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