Variation of Spirulina maxima biomass production in different depths of urea-used culture medium.

Fewer studies have assessed the outdoor cultivation of Spirulina maxima compared with S. platensis, although the protein content of S. maxima is higher than S.

Morphological, Molecular, and Biochemical Characterization of Monounsaturated Fatty Acids-Rich Chlamydomonas sp. KIOST-1 Isolated from Korea.

Microalgae hold promise as producers of sustainable biomass for the production of biofuels and other biomaterials. However, the selection of strains with efficient and robust production of desirable resources remains challenging. In this study, we isolated a green microalga from Korea and analyzed its morphological, molecular, and biochemical characteristics.

2-[(1,3-Benzo-thia-zol-2-yl)imino-meth-yl]-6-meth-oxy-phenol: a new monoclinic polymorph.

The title compound, C15H12N2O2S, is a P21/c polymorph of a previously reported P21/n polymorph [Büyükgüngör et al. (2004 ▶). Acta Cryst.

n-Butyldichlorido{4-cyclo-hexyl-1-[1-(pyridin-2-yl-κN)ethyl-idene]thio-semi-carb-azi-dato-κ²N¹,S}tin(IV).

Two independent mol-ecules comprise the asymmetric unit in the title compound, [Sn(C₄H₉)(C₁₄H₁₉N₄S)Cl₂]. In each mol-ecule, the Sn(IV) atom exists within a distorted octa-hedral geometry defined by the N,N',S-tridentate mono-deprotonated Schiff base ligand, two mutually trans Cl atoms, and the α-C atom of the n-butyl group; the latter is trans to the azo-N atom. The greatest distortion from the ideal geometry is found in the nominally trans angle formed by the S and pyridyl-N atoms at Sn [151.

Chlorido{4-cyclo-hexyl-1-[1-(pyridin-2-yl-κN)ethyl-idene]thio-semicarbazidato-κ(2)N(1),S}diphenyl-tin(IV).

The distorted octa-hedral geometry about the Sn(IV) atom in the title compound, [Sn(C(6)H(5))(2)(C(14)H(19)N(4)S)Cl], is defined by the N,N,S-tridentate Schiff base ligand, two mutually trans ipso-C atoms of the Sn-bound phenyl groups, and the Cl atom which is trans to the azo N atom. The two five-membered chelate rings and pyridyl ring are almost coplanar with the dihedral angle between the outer five-membered chelate and pyridine rings being 5.39 (8)°.

{4-Hy-droxy-N'-[(2E,3Z)-4-oxido-4-phenyl-but-3-en-2-yl-idene]benzo-hydrazidato}dimethyl-tin(IV).

The Sn(IV) atom in the title compound, [Sn(CH(3))(2)(C(17)H(14)N(2)O(3))], is five-coordinated within a C(2)N(2)O donor set provided by the N,N,O-tridentate ligand and two methyl groups. The resultant coordination geometry is inter-mediate between trigonal-bipyramidal and square-pyramidal. In the crystal, supra-molecular zigzag chains propagating along the c- axis direction are mediated by O-H⋯O hydrogen bonds, and weak C-H⋯π inter-actions consolidate the packing.

{4-Hy-droxy-N'-[(2E,3Z)-4-oxido-4-phenyl-but-3-en-2-yl-idene]benzo-hydra-zidato}diphenyl-tin(IV) methanol monosolvate.

Two independent diphenyl-tin mol-ecules and two independent methanol mol-ecules comprise the asymmetric unit of the title compound, [Sn(C(6)H(5))(2)(C(17)H(14)N(2)O(3))]·CH(3)OH. The Sn atom in each is five-coordinated by a tridentate ligand and the ipso-C atoms of the Sn-bound benzene substituents. The resulting C(2)N(2)O donor set defines a coordination geometry that is inter-mediate between trigonal-bipyramidal (TP) and square-pyramidal (SP), with one mol-ecule slightly tending towards TP and the other slightly towards SP.

(2E)-2-[2-(Cyclo-hexyl-carbamothio-yl)hydrazinylidene]-propanoic acid.

In the title thio-urea derivative, C(10)H(17)N(3)O(2)S, the carboxyl group and the least-squares plane through the cyclo-hexyl ring are twisted out of the plane through the central CN(3)S residue; the respective dihedral angles are 7.18 (8) and 62.29 (4)°.

3-{(E)-[1-(2-Hy-droxy-phen-yl)ethyl-idene]amino}-1-(2-methyl-phen-yl)thio-urea.

In the title thio-urea derivative, C(16)H(17)N(3)OS, the hy-droxy- and methyl-substituted benzene rings form dihedral angles of 9.62 (12) and 55.69 (6)°, respectively, with the central CN(3)S chromophore (r.

(2E)-2-(2-Phenyl-hydrazin-1-yl-idene)propanoic acid.

The 13 non-H atoms comprising the title compound, C(9)H(10)N(2)O(2), are close to planar (r.m.s.

1-Cyclo-hexyl-3-{(E)-[1-(pyridin-2-yl)ethyl-idene]amino}-thio-urea.

In the title thio-urea derivative, C(14)H(20)N(4)S, the non-ring non-H atoms are approximately planar, with an r.m.s.

Dichlorido{4-cyclo-hexyl-1-[1-(2-pyridyl-κN)ethyl-idene]thio-semicarbazidato-κN,S}phenyl-tin(IV).

The Sn(IV) atom in the title compound, [Sn(C(6)H(5))(C(14)H(19)N(4)S)Cl(2)], exists within a distorted octa-hedral geometry defined by the N,N',S-tridentate monodeprotonated Schiff base ligand, two mutually trans Cl atoms, and the ipso-C atom of the Sn-bound phenyl group; the latter is trans to the azo-N atom. The greatest distortion from the ideal geometry is found in the nominally trans angle formed by the S and pyridyl-N atoms at Sn [151.03 (4)°].

n-Butyl-dichlorido(2-{(1E)-1-[2-(pyridin-2-yl)hydrazin-1-yl-idene]eth-yl}phenolato)tin(IV).

Two independent mol-ecules comprise the asymmetric unit of the title compound, [Sn(C(4)H(9))(C(13)H(12)N(3)O)Cl(2)]. The Sn atom in each is coordinated by the tridentate ligand via the phenoxide O, hydrazine N and pyridyl N atoms, forming five- and six-membered chelate rings. The approximately octa-hedral coordination geometry is completed by the α-C atom of the n-butyl group (which is trans to the hydrazine N atom) and two mutually trans Cl atoms.

Aqua-chlorido{2-[2-(cyclo-hexyl-carbamo-thioyl-κS)hydrazinyl-idene-κN]propano-ato(2-)}phenyl-tin(IV).

In the title organotin compound, [Sn(C(6)H(5))(C(10)H(15)N(3)O(2)S)Cl(H(2)O)], the Sn atom is coordinated by the S, O, and imine N atoms of the dinegative tridentate ligand, a chloride ligand, the ipso-C atom of a phenyl ligand and by a water mol-ecule in a distorted octa-hedral coordination environment. Coordin-ated water mol-ecules link the organotin mol-ecules by forming O-H⋯O hydrogen bonds with both carbonyl and carboxyl-ate O atoms, leading to 12-membered {⋯OCO⋯HOH⋯}(2) synthons. This results in the formation of supra-molecular chains along the c axis.

{4-Hy-droxy-N'-[(2-oxido-1-naphthyl-κO)methyl-idene]benzohydrazidato-κN',O}dimethyl-tin(IV).

Two independent but very similar mol-ecules comprise the asymmetric unit of the title compound, [Sn(CH(3))(2)(C(18)H(12)N(2)O(3))]. Each Sn atom is coordinated by two methyl groups and two O atoms and an N atom from the dinegative tridentate ligand. The resultant C(2)NO(2) donor set defines a coordination geometry inter-mediate between square-pyramidal and trigonal-pyramidal, with a small tendency towards the former.

1,5-Bis[(E)-1-(2-hydroxyphenyl)ethyl-idene]thiocarbonohydrazide mono-hydrate.

In the title compound, C(17)H(18)N(4)O(2)S·H(2)O, the thio-urea derivative is almost planar, with an r.m.s.

Di-n-but-yl{1-[1-(2-hydroxy-phen-yl)ethyl-idene]-5-[1-(2-oxidophen-yl)ethyl-idene]thio-carbazonato-κO,N,S}tin(IV).

The 'symmetrical' 1,5-bis-[1-(2-hydroxy-phen-yl)ethyl-idene]thio-carbazone Schiff base condenses with dibutyl-tin oxide to form the title complex, [Sn(C(4)H(9))(2)(C(17)H(16)N(4)O(2)S)], in which the deprotonated ligand O,N,S-chelates to the Sn atom of two crystallographically independent mol-ecules. The ligand bears a formal negative charge on the S and one O atom; the other O atom retains its H atom. The Sn atoms are five-coordinated in a cis-C(2)NOSSn trigonal-bipyramidal environment, and the apical sites are occupied by the O and S atoms.

Di-n-but-yl{4-hydr-oxy-N'-[(2-oxido-1-naphthyl-κO)methyl-ene]benzo-hydrazidato-κO,N'}tin(IV).

The deprotonated Schiff base ligand in the title compound, [Sn(C(4)H(9))(2)(C(18)H(12)N(2)O(3))], O,N,O'-chelates to the Sn atom, which is five-coordinated in a cis-C(2)NO(2)Sn trigonal-bipyramidal environment. The apical sites are occupied by the O atoms [O-Sn-O = 155.2 (2)°].

n-Butyl-dichlorido{4-cyclo-hexyl-1-[phenyl(2-pyridyl-κN)methyl-ene]-thiosemicarbazidato-κN,S}tin(IV) chloro-form monosolvate.

The monodeprotonated Schiff base ligand in the title com-pound, [Sn(C(4)H(9))(C(19)H(21)N(4)S)Cl(2)]·CHCl(3), N,N',S-chelates to the Sn atom, which is six-coordinated in an octa-hedral environment. The three coordinating atoms along with the butyl C atom comprise a square plane, above and below which are positioned the Cl atoms. The amino group is a hydrogen-bond donor to a Cl atom of an adjacent mol-ecule, the hydrogen bond giving rise to a helical chain propagating in [010].

Dichlorido{4-cyclo-hexyl-1-[1-(2-pyridyl-κN)ethyl-idene]thio-semicarbazidato-κN,S}methyl-tin(IV).

The monodeprotonated Schiff base ligand in the title compound, [Sn(CH(3))(C(14)H(19)N(4)S)Cl(2)], N,N',S-chelates to the Sn atom, which is six-coordinated in an octa-hedral environment. The three coordinating atoms along with the methyl C atom comprise a square plane, above and below which are positioned the Cl atoms. The amino group is a hydrogen-bond donor to a Cl atom of an adjacent mol-ecule, the hydrogen bond giving rise to a helical chain extending parallel to [100].

1,5-Bis[(E)-1-(2-hydroxy-phen-yl)ethyl-idene]carbonohydrazide dimethyl sulfoxide solvate.

The title dimethyl sulfoxide (DMSO) solvate, C(17)H(18)N(4)O(3)·C(2)H(6)OS, shows the disubstituted urea derivative to adopt an almost planar geometry (r.m.s.