Band gap engineering from Vis to NIR range in CdPbS nanoparticles synthesized by one-step low-temperature decomposition of xanthate compound.

In the present study, a generic method for the modification of optical band gap of CdS nanostructures material over a wide spectral range due to Pb doping and formation of Cd(1-x)Pb(x)S nanoparticles and its size confinement is reported. The composite investigated in this study was grown by thermal decomposition of metal xanthates and lead concentration was varied to obtain different lead doping. This is a direct decomposition one pot synthesis route that avoids use of toxic phosphine and injection of chemicals during the reaction.

Band gap engineered P3HT/CdPbS composites for utilization of low energy photons.

In the present study, CdPbS composite has been synthesized in the P3HT matrix in a single step. The synthesis has been carried out at a temperature of 120 degrees C by the decomposition of xanthate compound in the polymer matrix. This synthesis method helps in proper distribution of nanoparticles in the polymer matrix.

Spectroscopic and antibacterial studies of new octaazamacrocyclic complexes derived from carbohydrazide and isatin.

A novel series of the macrocyclic complexes of the type: [M(C18H14N10O2)X2], where M = Co(II), Ni(II), Cu(II) and Zn(II); X = Cl(-), NO3(-) and CH3COO(-), has been synthesized by template condensation of carbohydrazide and isatin in methanolic medium. The complexes were characterized by various physico-chemical techniques, such as elemental analyses, molar conductance measurements, magnetic measurements, and electronic, NMR, IR and EPR spectral studies. The low value of molar conductance indicates them to be non-electrolytes.

Faster response of NO₂ sensing in graphene-WO₃ nanocomposites.

Graphene-based nanocomposites have proven to be very promising materials for gas sensing applications. In this paper, we present a general approach for the preparation of graphene-WO(3) nanocomposites. Graphene-WO(3) nanocomposite thin-layer sensors were prepared by drop coating the dispersed solution onto the alumina substrate.

Metal Ion Prompted Macrocyclic Complexes Derived from Indole-2,3-dione (isatin) and O-phenylenediamine With their Spectroscopic and Antibacterial Studies.

A novel series of the complexes of the type:[M(TML)X]X2; where TML is a tetradentate macrocyclic ligand; M=Cr(III), Fe(III); X=Cl-, NO3-, OAc- has been synthesized by condensation of indole-2,3-dione (isatin) and o-phenylenediamine in the methanolic medium. The complexes have been characterized with the help of various physicochemical techniques like elemental analyses, conductance measurements, magnetic measurements, infrared and electronic spectral studies. Molar conductance values indicate they are 1:2 electrolytes.

Template synthesis of macrocyclic complexes and their spectroscopic and antibacterial studies.

A new series of macrocyclic complexes of type [M(TML)X]X(2), where M = Cr(III), Fe(III), TML is tetradentate macrocyclic ligand, and X = Cl(-), NO(3)(-), CH(3)COO(-), have been synthesized by condensation of isatin and ethylenediamine in the presence of metal salt. The complexes were synthesized by both conventional and microwave methods. The complexes have been characterized with the help of elemental analysis, conductance measurement, magnetic measurement, and infrared, far infrared, and electronic spectral studies.

MR determination of glomerular filtration rate in subjects with solitary kidneys in comparison to clinical standards of renal function: feasibility and preliminary report.

This study was conducted to demonstrate the feasibility of quantifying single kidney glomerular filtration rate (skGFR) by magnetic resonance (MR) by comparison to the clinical estimates of GFR in volunteer subjects with a single kidney. Seven IRB-approved subjects with a solitary kidney, stable serum creatinine (SCr) and a 24 h creatinine clearance (CrCl) volunteered to undergo an MR examination that determined renal extraction fraction (EF) with a breathhold inversion recovery echo planar pulse sequence and renal blood flow with a velocity encoded phase imaging sequence. The product of EF and blood flow determines GFR.

Ectopic vaginal insertion of an obstructed duplicated ureter in an adult female: demonstration by magnetic resonance imaging.

The usual presentation of an ectopically inserted vaginal ureter is continuous dribbling of urine in an otherwise healthy girl. This case did not present with the usual symptomatology, as there was severe stenosis of the ectopically located ureteric orifice. Conventional imaging failed to show the vaginal insertion of an ectopic ureter.

Spontaneous development of endometrial venous malformation: diagnosis with color Doppler sonography.

We report the case of a spontaneous development of venous malformation within the endometrium of a patient with adenomyosis who was on oral contraceptives for a prolonged period of time. This vascular abnormality was incidentally identified and diagnosed with color Doppler ultrasound when the patient was referred for pelvic ultrasound for her symptoms related to adenomyosis. The vascular abnormality was characterized as venous malformation based on its Doppler tracing.

Retained products of conception mimicking a large endometrial AVM: complete resolution following spontaneous abortion.

We report an unusual appearance of retained products of conception that mimicked an arteriovenous malformation. A 38-year-old woman presented with persistent scant vaginal bleeding and declining levels of serum beta-HCG after therapeutic abortion. Sonographic examination revealed a highly vascular lobulated mass, which on spectral Doppler examination showed low resistance and high peak systolic velocity suggestive of arteriovenous shunting.

Gestational trophoblastic disease: pictorial review.

Ultrasound is the modality of choice for evaluating normal or abnormal first trimester pregnancy. Sonography can usually provide a specific diagnosis in abnormal first trimester bleeding. When the sonographic appearance is correlated with the clinical presentation, accurate diagnosis is possible in most cases of gestational trophoblastic disease (GTD).

Vasectomy-related changes on sonographic examination of the scrotum.

Purpose: The goal of this study was to evaluate the sonographic changes in the epididymis and testis after vasectomy using state-of-the-art high-resolution equipment.

Methods: We performed a retrospective study of 30 patients with a history of vasectomy and 30 patients without who were referred for scrotal sonography for various indications over a 1-year period. After excluding findings related to acute pathology, sonographic findings for the epididymis and testis in the 2 groups were tabulated and compared.

Caput succedaneum mimicking a cephalocele.

Caput succedaneum is relatively common at birth but infrequently diagnosed in utero. It has a benign prognosis, but it is very important not to misdiagnose it as a cephalocele, which carries a guarded prognosis. We present the case of a patient who experienced preterm labor and premature rupture of the membranes at 28 weeks' menstrual age.

Sonography of macrocysts in infantile polycystic kidney disease.

The typical sonographic appearance of autosomal recessive polycystic kidney disease (ARPKD) has been described as symmetrically enlarged, echogenic kidneys with occasional visualization of small cysts. Modern sonographic equipment, however, allows a greater ability to show parenchymal detail, and multiple tiny cysts and occasionally dilated tubular structures have become apparent. In this report, we describe sonographic findings of ARPKD that are quite similar to the macroscopic appearance.

Sonographic spectrum of hemorrhagic ovarian cysts.

Objective: To present the spectrum of sonographic findings associated with hemorrhagic ovarian cysts.

Methods: Experience with making specific and correct diagnosis of hemorrhagic cysts with the use of sonography was reviewed, and the spectrum of sonographic findings was identified.

Results: Endovaginal sonography facilitated excellent visualization of internal architectural details of an adnexal mass, which enabled specific diagnosis of hemorrhagic cysts instead of other adnexal masses.