Di-μ-oxido-bis­{[(R,R)-(+)-1-amino-2-(3-methoxy-2-oxidobenzyl­ideneamino-κ2 O 2,N)-1,2-diphenyl­ethane-κN]oxidovanadium(V)} dihydrate

In the crystal structure of the title compound, [V2(C22H21N2O2)2O4]·2H2O, oxide-bridged dimers of the complex are linked to water mol­ecules by hydrogen-bonding inter­actions. The two five-membered chelate rings in the dimeric mol­ecule both adopt twist conformations. Each VV atom is six-coordinated by one oxide group and by two N and one O atom of the tridentate Schiff base ligand, and is bridged by two additional oxide atoms. The metal centre has a distorted octa­hedral coordination. The monoanionic ligands occupy one equatorial and two axial positions

trans-Dioxidotetra­pyridine­rhenium(V) triiodide

In the title salt, [ReO2(C5H5N)4]I3, the cation and anion are both located on centres of symmetry. The ReV atom adopts a trans-ReO2N4 octa­hedral coordination and short intra­molecular C—H⋯O contacts occur within the cation. In the crystal, the cations form layers perpendicular to [100] and a weak C—H⋯O inter­action links the cations

5-[(4-Eth­oxy­anilino)meth­yl]-N-(2-fluoro­phen­yl)-6-methyl-2-phenyl­pyrimidin-4-amine

The asymmetric unit of the title compound, C26H25FN4O, consists of two symmetry-independent mol­ecules, denoted A and B. The conformation of each mol­ecule is mainly determined by an intra­molecular N—H⋯N hydrogen bond, which closes a six-membered ring. The dihedral angles between the pyrimidine ring and the phenyl, fluorophenyl and ethoxyphenyl rings are 15.4 (2), 28.4 (2) and 77.5 (2)°, respectively, in mol­ecule A, and 15.9 (2), 2.7 (2) and 61.8 (2)° in mol­ecule B. Inter­molecular N—H⋯N hydrogen bonds and π–π stacking inter­actions between pyrimidine rings [centroid–centroid distance = 3.692 (4) Å] connect mol­ecules A and B into dimers and C—H⋯O hydrogen bonds link the dimers into zigzag chains along [011]. The (4-eth­oxy­anilino)methyl group of the B mol­ecule is disordered over two sets of sites, the occupancy factor for the major component being 0.900 (2)

Mn oxide as a kinetically dominant “true” catalyst for water oxidation

Nature uses an Mn cluster for water oxidation, and thus, water oxidation using Mn clusters is interesting when used in artificial water-splitting systems. An important question is whether an Mn cluster is a true catalyst for water oxidation or not. Herein, an Mn–K cluster was investigated for electrochemical water oxidation to find the true and the kinetically dominant catalyst using X-ray absorption spectroscopy, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, and electrochemical methods. The experiments showed that conversion into nanosized Mn oxide occurred for the cluster, and the nanosized Mn oxides are the true catalyst for water oxidation

2-(Furan-2-yl)-3-hy­droxy-4H-chromen-4-one

In the crystal structure of the title compound, C13H8O4, the inversely oriented mol­ecules form inversion dimers through pairs of O—H⋯O hydrogen-bonding inter­actions. An intramolecular O—H⋯O hydrogen bond occurs. In the packing of the mol­ecules, the nearly planar 2-(furan-2-yl)-4H-chromene units [dihedral angle between the chromene and furan rings = 3.8 (1)°] are either parallel or inclined at an angle of 80.7 (1)°

Macrophage-specific RAM11 monoclonal antibody cross-reacts with basal cells of stratified squamous epithelia

RAM11 is a mouse monoclonal anti-rabbit macrophage antibody recognizing connective tissue and vascular (atheromatous tissue) macrophages. This study demonstrates a cross-reaction of RAM11 with an unknown antigen in rabbit normal epithelial cells. Formalin-fixed, paraffin sections of the New Zealand White rabbit normal skin, oral mucosa, esophagus, small intestine and lung were immunostained with RAM11 antibody followed by goat anti-mouse Cy-3-conjugated antiglobulin. RAM11-positive immunofluorescence was observed in basal layer cells of stratified squamous epithelia (skin, oral mucosa, esophagus). No RAM11 immunostaining was found in any cells of simple (intestinal, bronchial) epithelia. These findings show that basal cells of stratified squamous keratinized and non-keratinized epithelia of the rabbit express an antigenic epitope which is common with that of macrophage antigen recognized by RAM11 monoclonal antibody

The low-temperature phase of morpholinium tetra­fluoro­borate

The crystal structure of the low-temperature form of the title compound, C4H10NO+·BF4 −, was determined at 80 K. Two reversible phase transitions, at 158/158 and 124/126 K (heating/cooling), were detected by differential scanning calorimetry for this compound, and the sequence of phase transitions was subsequently confirmed by single-crystal X-ray diffraction experiments. The asymmetric unit at 80 K consists of three BF4 − tetra­hedral anions and three morpholinium cations (Z′ = 3). Hydrogen-bonded morpholinium cations form chains along the [100] direction. The BF4 − anions are connected to these chains by N—H⋯F hydrogen bonds. In the crystal structure, two different layers perpendicular to the [001] direction can be distinguished, which differ in the geometry of the hydrogen bonds between cationic and anionic species

Macrophage-specific RAM11 monoclonal antibody cross-reacts with basal cells of stratified squamous epithelia.

RAM11 is a mouse monoclonal anti-rabbit macrophage antibody recognizing connective tissue and vascular (atheromatous tissue) macrophages. This study demonstrates a cross-reaction of RAM11 with an unknown antigen in rabbit normal epithelial cells. Formalin-fixed, paraffin sections of the New Zealand White rabbit normal skin, oral mucosa, esophagus, small intestine and lung were immunostained with RAM11 antibody followed by goat anti-mouse Cy-3-conjugated antiglobulin. RAM11-positive immunofluorescence was observed in basal layer cells of stratified squamous epithelia (skin, oral mucosa, esophagus). No RAM11 immunostaining was found in any cells of simple (intestinal, bronchial) epithelia. These findings show that basal cells of stratified squamous keratinized and non-keratinized epithelia of the rabbit express an antigenic epitope which is common with that of macrophage antigen recognized by RAM11 monoclonal antibody

Expression of basal cell marker revealed by RAM11 antibody during epithelial regeneration in rabbits.

RAM11 is a mouse monoclonal anti-rabbit macrophage antibody recognizing connective tissue and vascular macrophages. Our previous report showed that RAM11 reacted with basal cells of stratified squamous epithelia of rabbit skin, oral mucosa and esophagus. The aim of the present study was to follow the appearance of RAM11 immunoreactivity in basal cells of regenerating oral epithelium in rabbits. No RAM11 immunostaining was observed in the regenerating epithelium examined on days 1 and 3 of wound healing. A weak immunofluorescence first appeared on day 7 in single basal cells and 32% of RAM11- positive basal cells were observed on day 14. These findings indicate that expression of the antigen recognized by RAM11 antibody is a transient event in the differentiation of oral keratinocytes which not always occurs during epithelial repair, although it is a constant feature of epithelial turnover in mature epithelium. Therefore this antigen can be regarded as basal cell marker only in mature stratified squamous epithelia