Elucidating the Mechanism of Copper-Induced Photoluminescence Quenching in 2-Phenylbenzimidazole-5-Sulfonic Acid.

To explore the possible impact of 2-Phenylbenzimidazole-5-sulfonic acid (PBSA) on the function of a sunscreen, in this work we investigate the binding of copper metal ions (Cu) to PBSA. Due to the existence of an intrinsic interaction phenomenon between Cu ions and PBSA molecules, the photoluminescence (PL) quenching arises owing to the charge transfer from PBSA to Cu ions. The mechanism of fluorescence quenching is probed experimentally following excitation at 306 nm by evaluating various quenching parameters with the help of the Stern-Volmer plot.

Impact of feeding biochar sources in rohu (Labeo rohita): Evaluating the growth, nutrient absorption, carcass composition, haematology and mineral status.

Biochar, an organic carbonaceous matter, is a unique feed additive that is now being used in aquaculture industry to formulate a cost-effective and eco-friendly diet. This experiment (in door) was conducted over course of 90 days to determine the most effective form of biochar, produced from various sources, for supplementation in Moringa oleifera seed meal-based diet. These sources were: farmyard manure biochar, parthenium biochar (PB), vegetable waste biochar, poultry waste biochar (PWB) and corncob waste biochar, added at 2 g/kg concentration to determine the effect of supplementation on the growth indices, nutrient absorption, carcass composition, haematology and mineral status of Labeo rohita (rohu) fingerlings.

Effect of surface ligands on the photoinduced electron transfer rate and efficiency in ZnO quantum dots and graphene oxide assemblies.

Apart from biocompatibility, ZnO quantum dots (QDs) are considered to be an efficient luminescence material due to their low cost and high redox potential. Here, we report the synthesis of ZnO QDs by using five different functionalizing ligands like mercaptoacetic acid (MAA), 3-mercaptopropionic acid (MPA), octadecene (ODE), ethylene glycol (EG), and oleyl amine (OLA) and fabricate their assemblies with graphene oxide (GO). We investigate the role of functionalizing ligands as a surface modifier of ZnO QDs for their attachment to GO.

Enhancing the FRET by tuning the bandgap of acceptor ternary ZnCdS quantum dots.

In this article, we report the band gap tuning of ternary ZnCdS quantum dots (QDs) by varying the concentration of the capping ligand, mercaptoacetic acid (MAA). The functionalization of QDs leads to the control of their size and band gap due to the quantum confinement effect, causing blue shift in the absorption and photoluminescence (PL) spectra with a gradual change in the concentration of the capping ligand from 0.5 to 2.

Probing the Förster Resonance Energy Transfer Dynamics in Colloidal Donor-Acceptor Quantum Dots Assemblies.

In this article, we report the synthesis of graphene quantum dots (GQDs) by hydrothermal method and surface modified CdS quantum dots (QDs) via the colloidal method and the fabrication of their dyad. The CdS QDs functionalized by mercaptoacetic acid (MAA) attach to the GQDs via electrostatic interactions. Spectral overlapping between the emission spectrum of GQDs and the absorption spectrum of CdS QDs allows efficient Förster resonance energy transfer (FRET) from GQDs to the CdS QDs in the GQDs-CdS QDs dyads.

Cu-Enhanced Efficient Förster Resonance Energy Transfer in PBSA Sunscreen-Associated Ternary Cu Cd S Quantum Dots.

Quantum dots (QDs) are semiconducting nanocrystals that exhibit size- and composition-dependent optical and electronic properties. Recently, Cu-based II-VI ternary Cu Cd S (CCS) QDs have emerged as a promising class of QDs as compared to their binary counterparts (CuS and CdS). Herein, a series of ternary CCS QDs are synthesized by changing the molar concentration of Cu ions only keeping the 1:1 ratio of the stoichiometric mixture of Cd and S.

Biochar as a feed supplement for nutrient digestibility and growth performance of fingerlings.

The purpose of the current research was to determine the impact of various biochar supplements on nutrient digestibility and growth performance of fingerlings fed on seed meal (MOSM) based diet. An experiment with 90 days of feeding was conducted to investigate the efficacy of biochar obtained from different sources such as parthenium, farmyard manure, poultry waste, vegetable waste, and corncob waste at 2 mg/kg. There were15 fingerlings in each tank in the triplicate set of tanks.

Elucidating the Size-dependent FRET Efficiency in Interfacially Engineered Quantum Dots Attached to PBSA Sunscreen.

Applying sunscreen on human skin provides photoprotection against the harmful ultraviolet (UV) radiation of the sun. Sunscreen absorbs UV radiations and dissipates the absorbed energy through various radiative and nonradiative pathways. The attachment of functionalized quantum dots (QDs) to the sunscreen component is a novel idea to enhance the absorption cross-section of UV radiations.

Elucidating the Photoluminescence Quenching in Ensulizole: an Artificial Water Soluble Sunscreen.

Employing natural or artificial sunscreens is essential to protect the skin from ultraviolet radiations that cause premature aging and develop melanoma and other forms of skin cancer. The 2-Phenylbenzimidazole-5-sulfonic acid, commonly known as ensulizole is a water-soluble artificial sunscreen that absorb UV-B (280 nm - 315 nm) radiations and protects the skin against the harmful effects of these radiations. We have measured steady-state photoluminescence (SSPL) spectra and photoluminescence (PL) kinetics of this compound in various conditions.

Death anxiety, perceived social support, and demographic correlates of patients with breast cancer in Pakistan.

Among several forms of miseries experienced by cancer patients, one of the significant experiential problems is the inevitable fear of death. The present study aimed at exploring the relationship between death anxiety, perceived social support, and different demographic variables. A sample of 80 breast cancer patients was recruited from different departments of oncology in Pakistan.

Post-traumatic stress disorder and resilience among adult burn patients in Pakistan: a cross-sectional study.

Background: Post-traumatic stress disorder (PTSD) is one of the major psychological disorders developed after burn injuries, though this subject of burn injuries and their destructive chronic psychological impact are not considered as thoughtfully in developing countries like Pakistan. Hence, the current study investigated the relationship between PTSD symptoms and resilience among burn patients in Pakistan, exploring the variance occurrence of the two variables concerning male burn patients and female burn patients.

Methods: Seventy burn patients from three burn units of Rawalpindi and Islamabad, Pakistan, during January 2015 to September 2015 were recruited.