Abstract From the water‐insoluble lipid fraction of chloroform/methanol/water extract gonads and body walls Patagonian starfish Allostichaster inaequalis , two new glucosylceramides ( 4 7 ) were isolated together with known phalluside‐1 1 2 3 previously from Cosmasterias lurida . The compounds characterized as (2 S ,3 R ,4 E ,8 ,10 )‐1‐(β‐ d ‐glucopyranosyloxy)‐3‐hydroxy‐2‐[( )‐2‐hydroxy‐15‐tetracosenoyl] amino‐4,8,10‐octadecatriene ,15 Z )‐2‐hydroxyhexadecanoyl] amino‐4,15‐docosadiene by...

Sea urchins have been used as a source of food from prehistoric times and research animal model since the 19th century. They presently are harvested in many parts world. In Argentina, sea studied only biological perspectives. Of 14 species found off coast Arbacia dufresnii is most abundant. It an omnivorous that exists dense populations Nuevo Gulf. Biomass production urchins, especially gonad yield, related to quantity quality. field, A. has small size low biomass gamete production....

Edible marine gastropods are consumed in northern Patagonia without regulations or knowledge of nutritional composition and food quality. We determined total lipids (TL), fatty acid (FA), paralytic shellfish poison (PSP) metal contamination six edible gastropods: Buccinanops globulosus, B. cochlidium, Trophon geversianus, Odontocymbiola magellanica, Tegula patagonica Nacella magellanica. TL was lowest the foot (0.29–0.56%) maximum organs (1.43–3.2%), presenting less than other species around...

This study reports nutrient allocation in different stages of gonadal development for two populations the sea urchin Arbacia dufresnii off Patagonian coast Argentina (Nuevo Gulf and San Jorge Gulf). The biochemical composition gonads was used to assess by measuring ash, soluble protein, lipid trichloroacetic acid-soluble carbohydrate concentrations, absolute contents over a 24-month period. Reproductive output terms energy calculated females. Results were correlated with histological stage...

We present a new low-temperature refinement of disodium zinc bis-(sulfate) tetra-hydrate {systematic name: poly[tetra-μ-aqua-di-μ-sulfato-zinc(II)disodium(I)]}, [Na(2)Zn(SO(4))(2)(H(2)O)(4)](n) or Zn astrakanite, which is an upgrade previously reported data [Bukin & Nozik (1974 ▶). Zh. Strukt. Khim.15, 712-716]. The compound part isostructural family containing the Mg (the original astrakanite mineral), Co and Ni species. very regular ZnO(aqua)(4)O(sulfate)(2) octa-hedra lie on centres...

The crystal structures of two complexes containing the peroxodisulfate anion are reported, namely μ-peroxodisulf­ato-1κO:2κO′-bis­[(acetato-κ2O,O′)aqua­(2,2′:6′,2′′-terpyridine-κ3N,N′,N′′)cadmium(II)] hepta­hydrate, [Cd2(C2H3O2)2(S2O8)(C15H11N2)2(H2O)2]·7H2O, (I), and catena-poly[[[bis(2,2′-bipy­ridine-κ2N,N′)mercury(II)]-μ-peroxodisulfato-κ2O:O′] 0.4-hy­drate], {[Hg(C10H8N2)2(S2O8)]·0.4H2O}n, (II). In both structures, behaves as a bridge, linking neighbouring coordination polyhedra in...

The title compound, [Zn(S2O3)(C18H12N6)(H2O)].0.5H2O, contains two almost identical independent monomeric moieties composed of an octahedral Zn centre coordinated by a tridentate 2,4,6-tri-2-pyridyl-1,3,5-triazine (tpt) ligand, one aqua ligand and O,S-chelating thiosulfate anion. structure is stabilized solvent water molecule. Multiple strong hydrogen bonds with additional weaker pi-pi interactions between tpt groups define multiple column spatial organization.

The title compound, [Na2Ni(SO4)2(H2O)4] or Ni astrakanite, is part of an isostructural family containing the Mg (the original astrakanite mineral), Zn and Co species. very regular NiO(H2O)4O(SO4)2 octa­hedra lie at centers symmetry, while rather distorted NaO(H2O)2O(SO4)4 are general positions, linked into a three-dimensional network by bridging water mol­ecules fully coordinated sulfate groups.

Allostichaster capensis (Perrier, 1875) (= inaequalis) is a fissiparous starfish inhabiting the South Atlantic Ocean coasts. On Patagonian coast, it displays an annual sexual and asexual reproductive cycle. Fission most frequent during austral summer (November-January) arm regeneration takes place rest of year. In this article, seasonal changes in biochemical composition body compartments are presented for population Bahia Kaiser, Golfo Nuevo, Chubut, Argentina, from June 2000 to May 2002....

catena-Poly[[[tetra­aqua­zinc(II)]-μ-4,4′-bipyridine-κ2N:N′] [[μ-thio­sulfato-κ2O:S-bis­[(thio­sulfato-κS)zinc(II)]]-di-μ-4,4′-pyridine-κ4N:N′] dihydrate], {[Zn(C10H8N2)(H2O)4][Zn2(S2O3)3(C10H8N2)2]·2H2O}n, is a polymeric zinc complex built up from thio­sulfate-containing anionic chains, where the Zn atom tetra­hedrally coordinated, and aqua-containing cationic chains incorporating octa­hedrally coordinated Zn. In each type of chain, 4,4′-bipyridine units act as spacers, run along three...

Orthorhombic Mn(SO3)(H2O)3 has been reinvestigated by single-crystal X-ray diffraction in two possible space groups, viz. P2(1)2(1)2(1) (with all atoms general positions) and Pnma the molecule bisected a mirror plane). The results confirm lower symmetry assigned previous neutron study. However, refinement of model requires introduction racemic twinning soft positional displacement restraints for H atoms. importance scrupulous report on absence violations as standard policy crystallographic...

The title complex, [Na(C 8 H 9 O 5 S)] n , is polymeric and consists of broad layers parallel to (100) made up an inner hydrophilic core Na + cations polar SO 3 C(OH)– groups, padded on both sides by two hydrophobic pendant methoxyphenyl groups. in the are six-coordinated into highly distorted NaO 6 octahedra four symmetry-related (hydroxy)(4-methoxyphenyl)methanesulfonate anions, leading a tightly woven two-dimensional structure. While there some hydrogen bonds providing interplanar...

The title compound, [Cd2(SO3)2(C18H12N6)2]·8H2O, is a dimer built up around symmetry center, where the sulfite anion displays so far unreported coordination mode in metal-organic complexes; binds as μ2-sulfite-κ4O,O′:O′,O′′ ligand to two symmetry-related seven-coordinate CdII cations, binding through its three O atoms by way of chelate bites with an atom common, which acts bridge. cation completed 2,4,6-tri-2-pyridyl-1,3,5-triazine acting usual tridentate mode.

The title compound, [Ni(SO 4 )(C 18 H 12 N 6 )(H 2 O) ]·2H O, is isostructural with the zinc and cobalt analogues already reported in literature. compound monomeric, an octahedral Ni centre coordinated by a tridentate 2,4,6-tri-2-pyridyl-1,3,5-triazine ligand, two water molecules monodentate sulfate ligand. presence of additional crystallization leads to total eight hydrogen-bond donors, from which very complex hydrogen-bonding scheme built up.

Purification of the ethanolic extract starfish L. annulatus led to isolation two sulfated glycosides and a pentahydroxylated steroid. One saponins contains novel pentasaccharide chain attached C-6 steroidal aglycone.

Two different zinc sulfite compounds have been prepared through the decomposition of pyrosulfite–­di­thionite ions in aqueous solution, viz. a dimeric complex, di-μ-sulfito-κ3O,O′:O′′;κ3O:O′,O′′-bis­[(4,4′-di­methyl-2,2′-bi­pyridine-κ2N,N′)­zinc(II)] dihydrate, [Zn2(SO3)2(C12H12N2)2]·2H2O, (I), which was solved and refined from twinned sample, an extended polymer, poly­[[aqua(1,10-phenanthroline-κ2N,N′)­zinc(II)]-μ3-sulfito-κ2O:O′:O′′-zinc(II)-μ3-sulfito-κ3O:O:O′],...

The title compound, [Mn2(SO4)2(C16H12N6)2(H2O)2]·4H2O, crystallizes as dimers built up around inversion centers. Mn cation is seven-coordinated in the form of a penta­gonal bipyramid, with three sulfate O atoms involved its coordination (two equatorial and one axial). species also bridge to second cation. other sites are occupied by N from tridentate 2,4,6-tris­(2-pyrid­yl)-1,3,5-triazine ligand remaining axial site water mol­ecule. This compound isostructural previously reported Cd analog.

In the title complex of zinc(II) with 3,4,7,8-tetra­methyl-1,10-phenanthroline (tmph), viz. [Zn(C16H16N2)(H2O)4](S2O3), metal atom has a monomeric octahedral ZnN2O4 environment comprising two N-atom donors from tmph group and four aqua O-atom donors. The cation is connected to thio­sulfate anions through compact hydrogen-bonding network involving all coordinated H-atom outer acceptors (O S) anion.

The title ionic zinc-acetate complex, [Zn(C2H3O2)(C12H12N2)2]2(S3O6).5H2O, contains a ZnN4O2 nucleus provided by the three bidentate ligands acting in chelating mode. trithionate unit, turn, acts as an isolated charge-balancing counter-ion. structure has three-dimensional assembly achieved through different interaction types, viz. Coulomb, hydrogen bonding and pi-pi. group one of solvent water molecules are disordered around inversion centers.