Photocatalytic Degradation of Alizarin Red-S by Fe-Co Nanoparticles Prepared By Chemical Co-precipitation Method

In the present study photocatalytic degradation of hazardous water soluble alizarin red dye by using Fe-Co nanoparticles  has been investigated. Fe-Co nanoparticles was synthesized by chemical co-precipitation method and characterized by TEM, SEM, EDAX and XRD. The photocatalytic degradation have been studied with the help of variety of parameters such as catalytic dose, dye concentration, pH, contact time and most important chemical oxygen demand. It was observed that The photocatalytic degradation of alizarin red dye by using Fe-Co nanoparticles was an effective ,economic, ecofriendly and faster mode of removing dye from an aqueous solution. The optimum condition for the degradation of the dye was 50 mg/L,pH 8.0, catalyst dose 60 mg/L and contact time 60 minutes. The kinetic studies also have been studied

FT-IR, Thermal and Optical Studies of Gel Grown Cobalt Tartrate Crystals

The growth of cobalt tartrate crystals was achieved in silica gel by single diffusion method. Optimum conditions were established for the growth of good quality crystals. Fourier transform infrared (FT-IR) spectroscopic study indicates the presence of water molecules and suggests that tartrate ions are doubly ionized. The thermal behavior of the material was studied using thermogravimetry (TG) and differential thermal analysis (DTA). The results show that the material is thermally stable up to30 C, beyond which it decomposes through many stages till the formation of cobalt oxide at 995 C. The non linear optical behavior of these crystals is reported and explained. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3553

Study of Growth, EDAX, Optical properties and Surface Morphology of Zinc Tartrate Crystals

Crystals of Zinc Tartrate were grown by a simple gel technique using single diffusion method. The optimum growth conditions were established by varying various parameters such as pH of gel solution, gel concentration, gel setting time, concentration of reactants etc. Crystals having different morphologies and habits were obtained. The crystals were characterized using Scanning Electron Microscope (SEM), UV, and Energy dispersive X-ray spectroscopy (EDAX). A result of the UV-Visible spectroscopy confirms nonlinear optical property of the crystals. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3027

A novel fluorescent "turn-on" chemosensor for nanomolar detection of Fe(III) from aqueous solution and its application in living cells imaging

An electronically active and spectral sensitive fluorescent “turn-on” chemosensor (BTP-1) based on the benzo-thiazolo-pyrimidine unit was designed and synthesized for the highly selective and sensitive detection of Fe³⁺ from aqueous medium. With Fe³⁺, the sensor BTP-1 showed a remarkable fluorescence enhancement at 554 nm (λex=314 nm) due to the inhibition of photo-induced electron transfer. The sensor formed a host-guest complex in 1:1 stoichiometry with the detection limit down to 0.74 nM. Further, the sensor was successfully utilized for the qualitative and quantitative intracellular detection of Fe³⁺ in two liver cell lines i.e., HepG2 cells (human hepatocellular liver carcinoma cell line) and HL-7701 cells (human normal liver cell line) by a confocal imaging technique

Effect of manually assisted cough technique on cough strength in extubated patients with organophosphorus poisoning

Background: Organophosphate (OP) ingestion is one of the most common emergencies treated at poisoning control centers worldwide. In an extubated patient with OPP, the abdomen and chest muscles are affected, it also affects a person's ability to breathe on their own, rendering them dependent on a ventilator. Intubation weakens the abdominal muscles and diaphragm making it difficult to cough and clear the chest. A manual cough-assisted technique is used to enhance the cough strength, to help with the clearance of secretions it can be carried out in lying, side-lying, or sitting positions. Objectives were to find the effect of a manually assisted cough (MAC) technique on cough strength (Peak cough flow (PCF) and maximum expiratory pressure) in extubated patients with organophosphorus poisoning.  Methods: According to the selection criteria, 50 participants extubated with organophosphorus poisoning were included. A baseline assessment was done of all individuals and MAC techniques were given. outcome measures were assessed with PCF meter and PEmax manometer. MAC techniques are given for 1 week to each patient. Results: Pre and post-intervention PCF and maximal expiratory pressure (MEP) was compared and analyzed with paired t tests and which shows an extremely significant difference with p<0.0001 which indicates significant improvement in cough strength after 1 week of MAC techniques. Conclusions: This study concluded that the MAC. Technique improved the cough strength (PCF and MEP) in extubated patients with organophosphorus poisoning

STABILITY INDICATING HPLC METHOD DEVELOPMENT AND VALIDATION FOR SIMULTANEOUS ESTIMATION OF DAPAGLIFLOZIN AND METFORMIN TABLET DOSAGE FORM

Objectives: The objective of this study was to developed and validated for the routine analysis of dapagliflozin (DAPA) and metformin (MET) in API and tablet dosage forms. Methods: The estimation of DAPA and MET was accomplished with C18 column (4.6 × 250 mm and 5 μm particle size) with DAD detector. The mobile phase consists of Methanol: Water 75:25% v/v of pH-3 adjusted with 0.05% OPA at flow rate of 1 mL/min. The detection wavelength was 233nm, respectively. Results: In the developed method, the retention time of DAPA and MET was found to be 5.099 min and 2.165 min. The reverse phase high performance liquid chromatography method produces linear response that were found in the range of 100–500 μg/mL. The limit of detection and limit of quantification for DAPA were found to be 0.06 μg/mL and 0.1855 μg/mL, respectively and for MET 6.09 μg/mL and 18.45 μg/mL, respectively. Calculated information acquired for both the preliminaries roughly coordinates with the information given by design expert programming which shows the genuineness of the chromatographic condition. Conclusion: The developed method was validated according to the ICH guidelines. The linearity, precision, range, and robustness were within the limits as specified by the ICH guidelines. Hence, the method was found to be simple, accurate, precise, economic, and reproducible

A uracil nitroso amine based colorimetric sensor for the detection of Cu²⁺ ions from aqueous environment and its practical applications

A simple uracil nitroso amine based colorimetric chemosensor (UNA-1) has been synthesized and screened for its cation recognition ability. Sensor UNA-1 exhibited a high sensitivity and selectivity towards Cu²⁺ ions in aqueous medium in the presence of a wide range of other competing cations (Ag⁺, Al³⁺, Ba²⁺+, Ca²⁺, Cd²⁺, Co²⁺, Cr³⁺, Cs⁺, Fe²⁺, Fe³⁺, Li⁺, Mg²⁺, Mn²⁺, Na⁺, Ni²⁺, Pb²⁺, Zn²⁺, Hg²⁺ and Sr²⁺). With Cu²⁺, the sensor UNA-1 gave a distinct color change from colorless to dark yellow by forming a complex of 1:1 stoichiometry. Furthermore, sensor UNA-1 was successfully utilized in the preparation of test strips and supported silica for the detection of Cu²⁺ ions from aqueous environment

The amidine based colorimetric sensor for Fe³⁺, Fe²⁺, and Cu²⁺ in aqueous medium

An amidine based chemosensor AM-1 was synthesized and characterized by various spectroscopic (FT-IR, 1H-NMR and mass) data and elemental analyses. Sensor AM-1 exhibited high selectivity and sensitivity towards Fe³⁺, Fe²⁺ and Cu²⁺ in the presence of other surveyed ions (such as Sr²⁺, Cr³⁺, Co²⁺, Ni²⁺, Zn²⁺, Ag⁺, Al³⁺, Ba²⁺, Ca²⁺, Cd²⁺, Cs⁺, Hg²⁺, K⁺, Li⁺, Mg²⁺, Mn²⁺, Na⁺ and Pb²⁺) with a distinct naked-eye detectable color change and a shift in the absorption band. Moreover, the emission of AM-1 was quenched selectively only in the presence of Fe³⁺

Chemosensor for micro to nano-molar detection of Ag+ and Hg2+ ions in pure aqueous media and its applications in cell imaging

The pyridine substituted thiourea derivative PTB-1 was synthesized and characterized by spectroscopic techniques as well as by single crystal X-ray crystallography. The metal ion sensing ability of PTB-1 was explored by various experimental (naked-eye, UV-Vis, fluorescence, mass spectrometry and 1H NMR spectroscopy) and theoretical (B3LYP/6-31G**/LANL2DZ) methods. PTB-1 exhibited a highly selective naked-eye detectable color change from colorless to dark brown and UV-Vis spectral changes for the detection of Ag+ with a detection limit of 3.67 µM in aqueous medium. The detection of Ag+ ions was achieved by test paper strip and supported silica methods. In contrast, PTB-1 exhibited a 23-fold enhanced emission at 420 nm in the presence of Hg2+ ions with a nano-molar detection limit of 0.69 nM. Finally, the sensor PTB-1 was applied successfully for the intracellular detection of Hg2+ ions in a HepG2 liver cell line, which was monitored by use of confocal imaging techniques