Intrahepatic arterioportal fistula: gadolinium-enhanced 3D magnetic resonance angiography findings and angiographic embolization with steel coils

We describe a case of a 59-year-old patient with intrahepatic arterioportal fistula secondary to blunt trauma sustained by a motor vehicle accident 36 years earlier. The fistula was demonstrated 36 years after the accident in a clinical work-up for diarrhea of 1 month's duration, using contrast enhanced three-dimensional breath-hold MRA. A communication between the dilated portal vein and dilated hepatic artery was shown at the level of distal branches. After subsequent demonstration by conventional angiography, the fistula was embolized using steel coils. Following the therapeutic intervention, the patient's diarrhea ceased.     

Synthesis,Biological Evaluation,and Molecular Docking Studies of Some N‐thiazolyl Hydrazones and Indenopyrazolones

Two new series of N‐thiazolyl hydrazones ( 3a – h ) and indenopyrazolones ( 4a – h ) were synthesized by the reaction of various 2‐acyl‐(1H)‐indene‐1,3(2H)‐diones, thiosemicarbazide, and phenacyl bromide/substituted phenacyl bromides. The in vitro antimicrobial activity of these synthesized compounds was assayed against four bacteria, namely, Bacillus subtilis, Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa, and two fungi, namely, Candida albicans and Aspergillus niger, by employing serial dilution method. Ciprofloxacin and fluconazole were used as antibacterial and antifungal reference drugs, respectively. Results of antimicrobial assay showed that the tested compounds have broad range of activity. The compounds 3h and 4a against C. albicans displayed more potency than fluconazole whereas 3b and 3c against B. subtilis showed activity comparable with ciprofloxacin. The synthesized indenopyrazolones ( 4a – h ) were evaluated for their in vitro antioxidant activity by 2,2‐diphenyl‐1‐picrylhydrazyl radical scavenging assay using ascorbic acid as reference. Compound 4b exhibited the highest 2,2‐diphenyl‐1‐picrylhydrazyl radical scavenging with IC₅₀ value 33.14 μg/mL. The observed results of antimicrobial activity were supported by molecular docking study performed to understand the binding interaction of hydrazones ( 3a – h ) and indenopyrazolones ( 4a – h ) with lanosterol 14α‐demethylase.     

Preparation of spherical and uniform-sized ferrite nanoparticles with diameters between 50 and 150 nm for biomedical applications

Spherical uniform-sized iron ferrite nanoparticles were synthesized by adding a disaccharide and seed ferrite crystals into an aqueous reaction solution. The average size range 50-150 nm was controlled by choosing one out of five disaccharides and by changing the amount of the seed crystals. The particles had a saturation magnetization and a crystalline structure which are similar to those of intermediate Fe₃O₄-γ-Fe₂O₃. When coated with citrate, the particles with nearly 100 nm diameter were stably suspended in water for 2 days. These novel particles will be utilized as magnetic carriers in biomedical applications.     

Chemistry of iron complexes—IV. Spectroscopic,magnetic and other properties of complexes of iron(II) iodide and iron(II) tetracarbonyl iodide with b

Bis(tertiaryphosphine/arsine oxides), Ph₂E(O) (CH₂)_nE(O)Ph₂ react with iron(II) iodide and iron(II) tetracarbonyliodide forming com     

Complexes of metal ions with phosphorus or arsenic containing ligands. III. Complexes of Mercury (II) halides with 1,2-ethylenebisdiphenylphosphine and 1,4-butylenebisdiphenylphosphine

Mercury(II) halides react with 1,2-ethylenebisdiphenylphosphine (DPE) and 1,4-butylenebisdiphenylphosphine (DPB) to give two types of complexes having the general formulae, [(diphos)HgX₂] and [(diphos)(HgX₂)₂]. The former seems to possess chain structure, while the latter has probably a bridged structure. In both the cases mercury(II) acquires sp³ tetrahedral configuration.     

Complexes of metallons with phosphorus or arsenic containing ligands. II. complexes ortho-carboxyphenyltertiaryarsines with mercury (II) halides

Ortho-carboxyphenyl-dimethylarsine (CPDMA), ortho-carboxpyhenyldiphenylarsine (CPDPA) and ortho-carboxyphenyldi(p-tolyl)arsine (CPDTA) react with mercury(II) halides to yield complexes having the formula HgX₂L where X is Cl, Br or I and L is ligand. In view of infrared spectral data these complexes have been classified into two classes: (a) those in which the carboxyl group of the ligand remains free (ligand being monodentate), and (b) those in which the ligand acts as a bidentate group. The complex Hg(Cl₂) · CPDPA is the only example of type (a) and has been assigned a dimeric halogen bridged structure. The remaining eight complexes are assumed to be monomeric. A tetrahedral structure is proposed for all the nine complexes.     

The arrhenius factors for some six-center unimolecular reactions

The Pyrolysis of ethyl formate has been carried out in the temperature range 557°–630° and the rate expression k = 10^12.34 e^{?48,100±500/RT} sec^?1 was obtained, in agreement with the prediction of O'Neal and Benson [1]. Calculated Arrhenius A-factors and experimental rate constants have been used to obtain the activation energies for the decomposition of the following compounds by the six-center molecular mechanism (in kcal/mole): 2-pentanone 59; methoxyacetone, 58; 2,4-pentanedione, 51; methyl butyrate, ≥ 70; 1-heptene, 54, and 4-methyl-1-hexene, 54–55.     

Laser-generated ultrashort multimegagauss magnetic pulses in plasmas

We demonstrate ultrashort (6 ps), multimegagauss (27 MG) magnetic pulses generated upon interaction of an intense laser pulse (10(16) W cm(-2), 100 fs) with a solid target. The temporal evolution of these giant fields generated near the critical layer is obtained with the highest resolution reported thus far. Particle-in-cell simulations and phenomenological modeling is used to explain the results. The first direct observations of anomalously rapid damping of plasma shielding currents produced in response to the hot electron currents penetrating the bulk plasma are presented.     

Kinetics of the “a” and “b” band emissions of mercury excimers with added gases

The kinetics of the “a” and “b” band emissions arising from the ¹Σ ← ³O_u and ¹Σ ← ³l_u transitions of the diatomic mercury molecule at λ_max ～ 4850 Å and 3350 Å, respectively, have been studied at low concentrations of mercury in the presence of N₂, C₂H₆, C₃H₈, and N₂O. Rate constant values have been obtained for the following reactions of the excimer molecule: Hg₂(³l_u) + N₂ → Hg₂(³O_u) + N₂ and Hg₂(³O_u) + RH → Hg₂(¹Σ) + RH, where RH = C₂H₆ or C₃H₈. From a consideration of the detailed kinetics of band emissions, it was also possible to derive rate constants for the quenching reactions of Hg(³P₀) atoms. These values are in reasonable agreement with those obtained previously from monitoring atom concentrations directly by 4047 Å absorbiometry.