Publications

Fluorescence quenching of environmentally benign highly fluorescence donor (D)-π-acceptor (A)-π-donor (D) quinoline dye by silver nanoparticles and anionic surfactant in liquid stage

A Study On The Prevalence Of Helicobacter Pylori Infection In Diabetic Patients.

BACKGROUND: Infection with Helicobacter pylori has been recognized as a major public health problem affecting 50% of the world's population. However, the data on the prevalence of helicobacter pylori infection in diabetic patients are scanty and contradictory. The aim of the study was to determine the prevalence of helicobacter pylori infection in diabetic patients and to evaluate the glycaemic control.METHODOLOGY: A prospective study was carried out for 6 months in Gastroenterology Department of Sagar Hospitals Jayanagar-Bengaluru. The study enrolled total 140 participants aged 18 years and above. Rapid urease test was done to detect Helicobacter pylori infection and FBS and PPBS levels were measured to assess blood sugar levels.RESULTS: H. Pylori infection was detected in 55.7% of the type-2 diabetes mellitus patients and a higher prevalence is seen in the mean age of 52.33=16.58 years. There was a statistically significant association present between pre and post treatment FBS and PPBS levels.CONCLUSION: Our study shows significantly higher prevalence of Helicobacter Pylori infection in diabetic patients. The results indicate a positive correlation between Helicobacter pylori infection and glycaemic control before and after treatment.

Studies of ninhydrin and phenylalanine in cationic dimeric gemini micellar system: Spectrophotometric and conductometric measurements

Energy-efficient electrolytic hydrogen generation using a Cu₃P nanoarray as a bifunctional catalyst for hydrazine oxidation and water reduction

A Cu₃P nanoarray acts as a durable bifunctional catalyst for hydrogen evolution reaction and hydrazine oxidation reaction with 100 mA cm⁻²at 0.72 V in 1.0 M KOH.

Layered Heterostructures of Ultrathin Polymeric Carbon Nitride and ZnIn₂S₄ Nanosheets for Photocatalytic CO₂ Reduction

The rational construction of heterostructures by using layered semiconductors with two-dimensional (2D) nanosheet configurations is promising to improve the efficiency of CO₂ photoreduction. Herein, the fabrication of layered heterojunction photocatalysts (PCN/ZnIn₂ S₄ ) by in situ growth of 2D ZnIn₂ S₄ nanosheets on the surfaces of ultrathin polymeric carbon nitride (PCN) layers is presented for greatly enhanced CO₂ conversion with visible light. The solution-processed self-assembly strategy renders the building of uniform and intimate junctions between PCN layers and ZnIn₂ S₄ subunits, which remarkably accelerates the separation and transfer of photogenerated charge carriers. In addition, the layered composites can also promote CO₂ adsorption and strengthen the visible-light absorption. Consequently, the optimized PCN/ZnIn₂ S₄ sheet-shaped composite shows reinforced photoactivity for deoxygenative CO₂ conversion, affording a high CO-production rate of 44.6 μmol h^-1 , which is 223 times higher than that of the pristine PCN nanosheets. Moreover, the heterojunction photocatalyst also exhibits high stability during repeated runs for five cycles.

Quinoline: A versatile bioactive scaffold and its molecular hybridization

Quinolines have become essential to many drugs, including broad-spectrum antibiotics, antivirus, antitubercular, and antimalarial agents. Owing to their importance in medicinal and pharmaceutic industries, several studies have been conducted to synthesize new and novel quinoline derivatives and their hybrid compounds with potent biological applications. In this review, we report the recent research involved in the search for biologically active molecules containing quinoline moiety, including their hybrids. The review provides information on advancements in the last ten years in the chemistry of hybrids and derivatives of quinolines. Also, the medicinal impact of some potent patents based on quinoline derivatives is discussed

Synthesis of Dy2O3 nanoparticles via hydroxide precipitation: effect of calcination temperature

Understanding the Origin of the Photocatalytic CO₂ Reduction by Au- and Cu-Loaded TiO₂: A Microsecond Transient Absorption Spectroscopy Study

Recent photocatalytic data for CO2 reduction by H2O using simulated sunlight have shown that, while TiO2 Evonik P25 containing Au nanoparticles (NPs; Au/P25) generates considerably higher amounts of hydrogen than methane, when P25 contains Au–Cu alloy NPs the selectivity toward methane increases dramatically. To gain insight into this photocatalytic behavior, in the present work we have performed a transient absorption spectroscopy study in the microsecond time scale of three samples, namely, Au/P25, Cu/P25, and (Au, Cu)/P25 using 355 (UV) and 532 nm (visible) lasers. The transient spectra exhibit as common features a narrower peak at about 320 nm and a broad band from 400 to 800 nm. Using oxygen as electron quencher and methanol as hole quencher, the transient signals have been assigned to charge separation. Several cases were observed, including: (i) absence of quenching attributed to the lack of accessibility of the quencher to the site, (ii) quenching of the signal, or (iii) increase of the transient signal intensity attributed to less charge recombination by removal of one of the charge carriers. Of relevance to understand the origin of the photocatalytic CO2 reduction by H2O is the quenching of the charge separated state by these two reagents. In this way, it was observed that H2O exerts a remarkable influence to the transient signal, quenching its intensity in the three samples at the two irradiation wavelengths, except for (Au, Cu)/P25 upon 532 nm excitation. Importantly, the distinctive behavior due to the presence of Cu has been attributed to the observed quenching by CO2 of the broad 400–800 nm band when excitation is performed with UV 355 nm light.

Microwave assisted synthesis, spectroscopic studies and non linear optical properties of bis-chromophores

CCDC 1028274: Experimental Crystal Structure Determination

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

Dye adsorption and bactericidal properties of TiO2/chitosan coating layer

Efficient Bisphenol-A detection based on the ternary metal oxide (TMO) composite by electrochemical approaches

Does type II diabetes mellitus increase the morbidity of patients with diverticulitis?

Diverticular disease is a common condition that has numerous complications. Understanding the impact of diabetes mellitus (DM) on these complications, especially diverticulitis, is crucial for optimizing patient care. This study aimed to determine the relationship between type II DM and the complications of colonic diverticulitis. A retrospective cohort study was conducted on 158 patients complaining of diverticulitis at Asir Central Hospital, Abha, Saudi Arabia, between January 2013 and December 2023. Data on gender, age, and chronic diseases, especially DM, were collected. Data retrieved regarding diverticulitis included the involved segment, complications, Hinchey classification, and management. We classified the patients into groups A for nondiabetics and B for diabetics. We analyzed the data using descriptive statistics, chi-square tests, t tests, and analysis of variance. Diabetic patients were significantly older than their nondiabetic counterparts. Diabetic patients showed a significantly higher complication rate (62.5%) and a higher degree of Hinchey classification compared to nondiabetic patients (43.7%). Furthermore, in comparison to individuals without diabetes, they were hospitalized for a considerably extended period (8.06 ± 7.38 days vs 5.26 ± 5.90 days, respectively). In addition, surgical intervention was observed to be considerably more common in patients with diabetes (46.9%) than in those without diabetes (16.5%). The study showed that DM adversely affected patients with diverticulitis. A greater incidence of complications and a higher category of Hinchey classification were associated with DM compared to nondiabetics. Additionally, diabetics underwent more surgical interventions and had longer hospital stays. Diabetics with diverticulitis require particular care to prevent severe complications.

Biobased Composites

Alkylthiol surface engineering: an effective strategy toward enhanced electrocatalytic N₂-to-NH₃ fixation by a CoP nanoarray

Building a hydrophobic self-assembled monolayer of octadecanethiol on a CoP nanoarray on a titanium mesh (C18@CoP/TM) greatly enhances the N₂ reduction activity with an NH₃ yield of 1.44 × 10⁻¹⁰ mol s⁻¹ cm⁻² and a FE of 14.03% in 0.1 M Na₂SO₄.

An experimental and density functional study on conformational and spectroscopic analysis of 5-methoxyindole-2-carboxylic acid

Hierarchical WO3@ BiVO4 nanostructures for improved green energy production

Amorphous Ni-B alloy nanoparticle film on Ni foam: rapid alternately dipping deposition for efficient overall water splitting

It is highly attractive, but still remains challenging, to develop noble metal-free bifunctional electrocatalysts efficient for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline media. In this letter, we describe the rapid electroless deposition of amorphous Ni-B nanoparticle film on Ni foam (Ni-B/Ni foam) by alternative dipping of Ni foam into Ni precursor and reducing solutions. This Ni-B/Ni foam acts as an efficient and durable 3D catalytic electrode for water splitting, affording 100 mA cm(-2) at 360 mV overpotential for the OER and 20 mA cm(-2) at 125 mV overpotential for the HER in 1.0 M KOH, and its two-electrode electrolyzer demands a cell voltage of 1.69 V to afford 15 mA cm(-2) water-splitting current. Moreover, the catalyst loading can be easily tuned and this alternately dipping deposition technique works universally for other conductive substrates.