Decacarbonyl-1κ3 C,2κ3 C,3κ4 C-μ-hydrido-1:2κ2 H:H-(μ-quinoline-2-thiol­ato-1:2κ2 S:S)diosmium(I)osmium(0)(3 Os—Os)

The title compound, [Os3(C9H6NS)H(CO)10], contains a nearly equilateral triangle of Os atoms. Two of the Os atoms are bridged by an S atom of the quinoline-2-thiol­ate ligand. Ten carbonyl groups complete the cluster, resulting in a distorted octa­hedral geometry for each Os atom. The hydride atom, which was located in a difference Fourier map and refined isotropically, bridges the shortest Os–Os edge

Diaqua­bis(picolinato N-oxide-κ2 O,O′)zinc(II)

In the title compound, [Zn(C6H4NO3)2(H2O)2], the Zn atom is located on a centre of inversion and shows a distorted octa­hedral coordination geometry. Two aqua ligands occupy the axial positions and four O atoms of the two chelating picolinic acid N-oxide ligands are located in the equatorial plane. Inter­molecular hydrogen bonds between aqua ligands and organic ligands link mol­ecules into a two-dimensional arrangement

2,2′-[1-(2,4,6-Trichlorophenyl)-1H-1,2,4-triazole-3,5-diyl]diphenol

The title compound, C20H12Cl3N3O2, was synthesized by the reaction of 2-(2-hydroxy­phen­yl)benz[e][1,3]oxazin-4-one with 2,4,6-trichloro­phenyl­hydrazine in ethanol. The trichloro­phenyl ring is nearly perpendicular to the triazole plane [dihedral angle 80.56 (8)°], whereas the two hydroxy­phenyl rings are approximately coplanar with the triazole ring [dihedral angles of 2.79 (12) and 8.00 (14)°]. Intra­molecular O—H⋯N hydrogen bonding is observed between the hydroxy­phenyl and triazole rings

3-(1,3-Dithio­lan-2-yl­idene)-1-phenyl­pyridine-2,4(1H,3H)-dione

The title compound, C14H11NO2S2, was synthesized by reaction of 2-(1,3-dithio­lan-2-yl­idene)-3-oxo-N-phenyl­butanamide with N,N′-dimethyl­formamide dimethyl acetal in N,N′-dimethyl­formamide. The mol­ecule exhibits a V-shaped conformation in the crystal, with a dihedral angle of 65.9 (2)° between the benzene and pyridine rings. In the crystal. C—H⋯O and C—H⋯S interactions are observed. Two C atoms of the dithiolane ring are disordered with occupancies in the ratio 0.541 (13)/0.459 (13)

An Effective Way to Prepare Submicron MoO2 Anodes for High-Stable Lithium-Ion Batteries

Herein, MoO2-based submicrons (named MoO2@C) are synthesized through an effective one-step hydrothermal process. The prepared MoO2 submicrons wrapped in carbonouse layer are uniformly produced and can be applied to the anodes in lithium-ion batteries (LIBs). The novel MoO2@C electrodes demonstrate attractive lithium storage ability. Moreover, compared with the commercial pure MoO2, the MoO2@C delivers a superior electrochemical capacity (e.g, 760.83 mAh g-1 capacity in long-life test at high rate of 1 A g-1) with outstanding capacity retention ratio and stability as well as rate capability. The superior lithium storage capabilities result from plenty of the Li+ sites and adequate electrolyte infiltration effect, which allows the fast transport of electrons and ions, and well-dispersed MoO2 submicrons in carbon-based layers that effectively prevents aggregation of nano size particles

Hábitos alimenticios de Calanus sinicus (Crustacea: Copepoda) durante primavera y otoño en el mar Bohai, investigados mediante un índice de herbivoría

Pigment ingestion rate (PIR) and egg production rate (EPR) of the dominant copepod Calanus sinicus, as well as chlorophyll-a concentration and phytoplankton assemblages were measured in the Bohai Sea, North China in June 1997, October 1998 and May 1999. A herbivore index (H) was also calculated as the carbon specific ratio of PIR and EPR, in order to investigate its feeding habits in the spring and autumn phytoplankton bloom respectively. On average, chlorophyll-a concentration was relatively similar (1-1.34 mg m-3) in the three cruises, but PIR was quite different. It was 3.24 µg C female-1 d-1 in October, equivalent to one half of the PIR for June and one third of the PIR for May. Average EPR was highest in May, and quite similar during the other two months. According to H values, herbivorous feeding contributed 100% of the egg production of C. sinicus in June, 82.5% in May, but only 47.8% in October. It is possible that omnivorous feeding of C. sinicus in October was induced by a prevalence of large-sized diatoms and sufficient non-phytoplankton food resources during the autumn bloom period.La tasa de ingestión de pigmentos (PIR) y la tasa de producción de huevos (EPR) del copépodo dominante Calanus sinicus ha sido determinada, conjuntamente con la concentración de clorofila- a y la composición del fitoplancton, en el mar de Bohai, norte de China, en junio 1997, octubre 1998 y mayo 1999. Para investigar los hábitos alimenticios durante los blooms de fitoplancton de primavera y otoño se ha determinado un índice de herbivoría (H), calculado como el cociente de las tasas específicas PIR y EPR en carbono. En promedio, la concentración de clorofila-a fue relativamente similar (1-1,34 mg m-3) en las tres campañas oceanográficas. Pero los valores de PIR difirieron bastante, variando desde 3,24 μg C hembra-1 d-1 en octubre a valores un medio y un tercio de dicho valor, respectivamente, en junio y mayo. Los valores promedio de EPR fueron máximos en mayo, y bastante similares durante los otros dos meses. Según los valores del índice H obtenidos, la herbivoría contribuyó un 100% en la producción de huevos de C. sinicus en junio y un 82,5% en mayo, mientras que sólo explicó un 47,8% de la producción de huevos en octubre. este estudio sugiere que la alimentación omnivora de C. sinicus en octubre fue inducida por la prevalencia de diatomeas de gran tamaño y la presencia suficiente de alimento no fitoplanctónico durante el periodo del bloom otoñal.

Poly[(μ 6-benzene-1,2,4,5-tetra­carboxyl­ato)bis­(1,10-phenanthroline-κ 2 N,N′)dimanganese(II)]

The title polymeric compound, [Mn2(C10H2O8)(C12H8N2)2]n, was obtained by the reaction of manganese(II) chloride tetra­hydrate with benzene-1,2,4,5-tetra­carboxylic acid (H4bta) in aqueous solution. Each Mn2+ ion is coordinated in a distorted octa­hedral geometry by two N atoms from one 1,10-phenanthroline ligand and four O atoms [Mn—O = 2.116 (2)–2.237 (2) Å] from three bta4− ligands, which also act as bridging groups between the Mn2+ ions

Diaqua­bis[3-(2-hydroxy­ethyl)-2-methyl-4-oxopyrido[1,2-a]pyrimidin-9-olato-κ2 N 1,O 9]manganese(II)

The title compound, [Mn(C11H11N2O3)2(H2O)2], consists of discrete mononuclear complex mol­ecules. The MnII atom is located on an inversion center and coordinated by two N atoms and two O atoms, each pair in a trans mode, from two 3-(2-hydroxy­ethyl)-2-methyl-4-oxopyrido[1,2-a]pyrimidin-9-olate ligands and by two water mol­ecules. The coordination geometry around the MnII atom is slightly distorted octa­hedral. Mol­ecules are linked by O—H⋯O hydrogen bonds into a three-dimensional network

In vitro evaluation of anticancer nanomedicines based on doxorubicin and amphiphilic Y-shaped copolymers

Four monomethoxy poly(ethylene glycol)-poly(L-lactide-co-glycolide)2 (mPEG-P( LA-co-GA)2) copolymers were synthesized by ring-opening polymerization of L-lactide and glycolide with double hydroxyl functionalized mPEG (mPEG-(OH)2) as macroinitiator and stannous octoate as catalyst. The copolymers self-assembled into nanoscale micellar/vesicular aggregations in phosphate buffer at pH 7.4. Doxorubicin (DOX), an anthracycline anticancer drug, was loaded into the micellar/vesicular nanoparticles, yielding micellar/vesicular nanomedicines. The in vitro release behaviors could be adjusted by content of hydrophobic polyester and pH of the release medium. In vitro cell experiments showed that the intracellular DOX release could be adjusted by content of P(LA-co-GA), and the nanomedicines displayed effective proliferation inhibition against Henrietta Lacks’s cells with different culture times. Hemolysis tests indicated that the copolymers were hemocompatible, and the presence of copolymers could reduce the hemolysis ratio of DOX significantly. These results suggested that the novel anticancer nanomedicines based on DOX and amphiphilic Y-shaped copolymers were attractive candidates as tumor tissular and intracellular targeting drug delivery systems in vivo, with enhanced stability during circulation and accelerated drug release at the target sites