Brunner's glands hamartoma with pylorus obstruction: a case report and review of literature.

Proliferative lesions of the Brunner's glands are uncommonly encountered lesions of the small intestine, originating from the deeply seated mucosal and submucosal Brunner's glands, mainly in the duodenum. The vast majorities of these lesions are benign and include Brunner's glands hyperplasia (adenomas/nodules) and hamartomas. The etiology and pathogenesis of these lesions are not fully understood, and the diagnosis can sometimes be challenging.

Two Unusual Presentations of Presacral Schwannoma; A Case Series.

Introduction: Schwannomas are benign tumors that arise from the Schwann cells of nerve fibers. They commonly occur in the head and neck, mediastinum and extremities. However, they are extremely rare to be found in the pelvis.

Polymer-supported CuPd nanoalloy as a synergistic catalyst for electrocatalytic reduction of carbon dioxide to methane.

Developing sustainable energy strategies based on CO2 reduction is an increasingly important issue given the world's continued reliance on hydrocarbon fuels and the rise in CO2 concentrations in the atmosphere. An important option is electrochemical or photoelectrochemical CO2 reduction to carbon fuels. We describe here an electrodeposition strategy for preparing highly dispersed, ultrafine metal nanoparticle catalysts on an electroactive polymeric film including nanoalloys of Cu and Pd.

Spectroscopic and electrochemical properties of group 12 acetates of di-2-pyridylketone thiophene-2-carboxylic acid hydrazone (dpktch-H) complexes. The structure of [Cd(η³-N,N,O-dpktch-H)₂].

The reaction between [dpktch] and [M(OAc)2] (M=group 12 metal atom) in refluxing CH3CN gave [M(η(2)-O,O-OAc)(η(3)-N,N,O-dpktch-H)]·nH2O (n=0 or 1). The infrared and (1)H NMR spectra are consistent with the coordination of [η(2)-O,O-OAc] and [η(3)-N,N,O-dpktch-H](-) and the proposed formulations. The electronic absorption spectra of [M(η(2)-O,O-OAc)(η(3)-N,N,O-dpktch-H)]·nH2O measured in non-aqueous solvents revealed a highly intense intra-ligand-charge transfer (ILCT) transition due to π-π∗ of dpk followed by dpk→thiophene charge transfer.

Haemocompatibility of titanium and its alloys.

This review outlines the current understanding of the interactions of titanium and its alloys with blood components, and the ways in which surface modification techniques can be used to alter the surface physicochemical and topographical features that determine blood-material interactions. Surface modification of the spontaneously formed titanium oxide surface layer is a highly attractive means of improving haemocompatibility without forgoing the advantageous mechanical and physical properties of titanium and its alloys. A number of surface modification techniques and treatment processes are discussed in the context of enhancing the haemocompatibility of titanium and its alloys, with a view to optimising the clinical efficacy of blood-contacting devices and materials.

Is surgery indicated in patients with stage IIIa lung cancer and mediastinal nodal involvement?

The role of surgery in the treatment of patients with stage IIIa non-small cell lung cancer (NSCLC) and mediastinal node involvement is examined in this best evidence topic according to a structured protocol. A total of 579 papers were identified using the outlined search, 12 of which were deemed to represent the best available evidence. From the data summarized, we conclude that surgery, as part of a multimodality therapeutic approach, offers a survival benefit for patients with resectable N2 NSCLC.

Molecular sensing behavior of di-2-pyridyl ketone p-aminophenylhydrazone hydrate (dpkabh.H2O) in non-aqueous media.

(1)H NMR studies on di-2-pyridyl ketone p-aminobenzoylhydrazone hydrate (dpkabh.H(2)O) in non-aqueous solvents show high sensitivity to its surrounding. In protophilic solvents (d(6)-dmso or d(7)-dmf), the amine protons are equivalent, while in CDCl(3) they are not.

Nuclear magnetic resonance and optosensing properties of di-2-thienyl ketone p-nitrophenylhydrazone (DSKNPH) in non-aqueous media.

The compound di-2-thienyl ketone p-nitrophenylhydrazone (DSKNPH) melting point 168-170 degrees C was isolated in good yield from the reaction between di-2-thienyl ketone (DSK) and p-nitrophenylhydrazine in refluxing ethanol containing a few drop of concentrated HCl. Nuclear magnetic resonance studies on DSKNPH in non-aqueous solvents revealed strong solvent and temperature dependence due to solvent-solute interactions. Optical measurements on DSKNPH in DMSO in the presence and absence of KPF(6) gave extinction coefficients of 83,300+/-2000 and 25,600+/-2000M(-1)cm(-1) at 612 and 427nm at 295K.

Optosensing properties of fac-Re(CO)(3)(dpknph)Cl (dpknph=di-2-pyridyl ketone p-nitrophenyl hydrazone) toward chemotactic N-formylamino acids.

Optical measurements on fac-Re(CO)(3)(dpknph)Cl in polar non-aqueous solvents in the presence and absence of NaBH(4)/KPF(6) revealed reversible interconversion between the high (beta-) and low (alpha-) energy electronic states of fac-Re(CO)(3)(dpknph)Cl. The reversibility of these interactions and the disturbance of the equilibrium distribution of the low (alpha-) and high (beta-) energy electronic state upon addition of NaBH(4)/KPF(6) mark improvement in the optosensing properties of fac-Re(CO)(3)(dpknph)Cl. The optical behavior of fac-Re(CO)(3)(dpknph)Cl in the presence and absence of the l-methionine and chemotactic N-formylamino acids: N-formyl-l-methionine (NFM), N-formyl-l-glycine (NFG) and N-formyl-l-phenylalanine (NFP) shows the alpha- and beta-electronic states of fac-Re(CO)(3)(dpknph)Cl to be insensitive to l-methinonine and highly sensitive to N-formylamino acids.

catena-Poly[[[aqua-(propane-1,3-diamine-κN,N')copper(II)]-μ-fumarato-κO:O'] monohydrate].

The asymmetric unit of the title compound, {[Cu(C(4)H(2)O(4))(C(3)H(10)N(2))(H(2)O)]·H(2)O}(n), consists of two Cu(II) atoms, half each of two propane-1,3-diamine ligands and two coordinated water mol-ecules, all lying on crystallographic mirror planes, also one fumarate dianion and one uncoordinated water mol-ecule in a general position. The Cu(C(3)H(10)N(2))(H(2)O) units are linked via fumarate dianions into a zigzag chain running along the a axis. A longer Cu-O distance [2.

Polymorphic di-2-pyridyl ketone 4-nitrophenylhydrazone (dpknph): the structure of beta-dpknph.

A new polymorph of di-2-pyridyl ketone 4-nitrophenylhydrazone [alternative name: N-(dipyridin-2-ylmethylene)-N'-(4-nitrophenyl)hydrazine], C17H13N5O2, isolated from the filtrate of a sonicated acetonitrile solution of dpknph and CdCl2, was found to crystallize in the monoclinic space group P21/c, in contrast to the known form which crystallizes in P21/n. The non-coplanar molecules pack in parallel stacks without any intermolecular hydrogen-bonding interactions. This packing pattern contrasts with the interlocked interdigitated packing seen in the previously known polymorph.

Mikanolide from Jamaican Mikania micrantha.

Mikanolide [systematic names: 1,10:2,3-diepoxy-6,8-dihydroxy-11-vinylgermacr-4-ene 12,14-di-gamma-lactone and 7,10a-dimethyl-1a,1b,2a,6a,7,9a,10,10a-octahydro-4H-6,3-methenofuro[3,2-c]bisoxireno[f,h]oxacycloundecin-4,8(6H)-dione], C(15)H(14)O(6), derived from a variety of Mikania micrantha growing in Portland, Jamaica, contains a methylcyclodecane ring fused to an unsaturated planar alpha,gamma-lactone, an envelope-type near-planar vinyl-beta,gamma-lactone and two epoxide moieties. The crystal packing shows stacks of mikanolide molecules interlocked via a network of non-classical C-H..

Optosensing behavior of the first Ru(II)-compound of di-2-pyridylketone-p-nitrophenylhydrazone (dpknph), [Ru(bpy)2(dpknph)]Cl2.

The reaction between Ru(bpy)(2)Cl(2) (bpy=2,2'-bipyridine) and di-2-pyridylketone-p-nitrophenylhydrazone (dpknph) in refluxing ethanol gave [Ru(bpy)(2)(dpknph)]Cl(2) in good yield. Optical measurements on [Ru(bpy)(2)(dpknph)]Cl(2) in non-aqueous media revealed the presence of two interlocked electronic states due to conformational changes associated with the hydrazone moiety of [Ru(bpy)(2)(dpknph)]Cl(2). The equilibrium distribution of the high-energy beta-conformation associated with the high-energy electronic state and the low-energy alpha-conformation associated with the low-energy electronic state is solvent and solute dependent controlled by the solvent-solute and solute-solute interactions.

Di-2-pyridyl ketone p-aminobenzoylhydrazone hydrate.

The title compound [systematic name: 4-amino-2'-(di-2-pyridylmethylene)benzohydrazide hydrate], C(18)H(15)N(5)O.H(2)O, crystallizes in the triclinic space group P-1. Structural analysis shows one pyridine ring and the p-aminobenzoylhydrazone moiety to be coplanar and orthogonal to the second pyridine ring.

fac-Tricarbonyl[hydroxybis(2-pyridyl)methanolato-kappa3N,O,N']rhenium(I).

The Re(I) centre in the title compound, [Re(C(11)H(9)N(2)O(2))(CO)(3)] or fac-Re(CO)(3)(dpkO,OH) [dpkO,OH is hydroxybis(2-pyridyl)methanolato], (I), is in a pseudo-octahedral environment in which the major distortion is due to the constraints associated with the tridentate binding of the dpkO,OH anion. The carbonyl groups are orthogonal, with an average C-Re-C angle of 90.2(3) degree.