Nutritional and Functional Potential of Carob Syrup Date and Maple Syrups.

Research Background: The carob tree ( L.) is grown primarily for its seeds that are utilized in the production of the highly prized locust bean gum. The material left after the separation of seeds from the pods is utilized in the production of a range of traditional products including carob syrup, usually in cottage-type industries.

The mixed-valent 10-manganese(III/IV)-containing 36-tungsto-4-arsenate(V), [MnMnO(OH)(HO)(A-β-AsWO)].

Interaction of the mixed-valent 12-manganese coordination complex [MnMnO(CHCOO)(HO)] with the lacunary 9-tungstoarsenate(V) [A-α-AsWO] resulted in the 10-manganese(III/IV)-containing 36-tungsto-4-arsenate(V), [MnMnO(OH)(HO)(A-β-AsWO)] (1). Polyanion 1 was isolated as a hydrated mixed potassium-sodium salt, KNa[MnMnO(OH)(HO)(A-β-AsWO)]·104HO, which crystallizes in the orthorhombic space group Pbcn and was characterized by FT-IR spectroscopy and single-crystal X-ray diffraction, as well as elemental and thermogravimetric analyses. The title polyanion contains a unique [MnMnO(OH)(HO)] core stabilized within the 36-tungsto-4-arsenate(V) framework.