Publications by authors named "Waheed Khan"

Diarrhea is a globally major problem especially Escherichia coli induced diarrhea becoming fatal nowadays in developing countries. Colon-targeted chitosan microspheres (Ms) comprising of lipase‑zinc and lipase‑copper complexes were prepared, loaded with Attapulgite (Cts-Li-Zn-ATG/Ms and Cts-Li-Cu-ATG/Ms) for the treatment of bacterial diarrhea. Thin layer chromatography (TLC) and Fourier-transform infrared spectroscopy (FTIR) studies were used for confirmation of proposed lipase-metal complexes.

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The abuse of antibiotics has led to serious environmental pollution and the emergence of drug-resistant bacteria surpassing the replacement rate of antibiotics. Herein, near-infrared fluorescent carbon dots (NIR-CDs) were developed to meet the requirements for oxytetracycline (OTC) detection in food and water samples (milk, honey, and lake water) with a detection limit of 0.112 μM.

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Carbon dots are emerging fluorescent nanomaterials with unique physical and chemical properties and a wide range of applications. Herein, we have designed and successfully synthesized thermally stable green emissive nitrogen-doped carbon dots (NCDs) with a photoluminescent quantum yield of 11.32% through facile solvent-free carbonization.

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Article Synopsis
  • Antimicrobial resistance is a growing global health issue, prompting research into new materials to fight multi-drug-resistant bacteria.
  • This study introduces surfactin-coated silver nanoparticles, demonstrating their effectiveness as an antibacterial and antibiofilm agent with safe dermal applications.
  • Results indicate that these nanoparticles do not cause significant skin irritation or pathological changes, supporting their potential for treating drug-resistant bacterial infections and improving wound care.
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Dopamine (DA) is a biomolecule that plays a critical part in the functioning of our brains by promoting motivation, maintaining focus, and altering mood. Excessive or low-level concentrations of DA in the human brain led to a dangerous neurological disorder. It is significantly important to trace the precise amount of DA to prevent such risky brain disease.

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Microbes have shown potential for the bioremediation of tannery waste polluted soil. During our previous study, it was observed that heavy metal resistant CS8 augmented growth and phytoremediation capability of an ornamental plant. Objective of the present research work was to evaluate the capability of CS8 assisted plants for the phytoremediation of tannery solid waste (TSW) polluted soil.

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Guarding against an anti-science camouflage within infodemics is paramount for sustaining the global vaccination drive. Vaccine hesitancy remains a growing concern and a significant threat to public health, especially in developing countries. Infodemics, conspiracy beliefs and religious fatalism primarily fuel vaccine hesitancy.

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Fluorescent carbon dots have been highly reported nanomaterials in recent times because of their excellent physio-chemical properties and various field of applications. Herein, a one-step hydrothermal approach was used to synthesize high biocompatible nitrogen and sulfur co-doped carbon dots, and examined their chemical sensing (Hg) and biological imaging properties. The N,S-CDs exhibited blue light, demonstrating a high quantum yield of up to 44.

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The photocatalytic technology illustrates an eco-friendly and sustainable route to overcome environmental and energy issues. The successful construction of a photocatalyst depends on four key elements: light absorption ability, the density of active sites, redox capacity, and photoinduced electron-hole recombination rate. Sincemost of intrinsic semiconductor photocatalysts cannot meet all these requirements, they are often modified to boost their photocatalytic properties.

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The study aimed to improve the treatment of impetigo with naturally occurring quercetin and its copper-quercetin (Cu-Q) complex by preparing sustained-release (SR) nanoparticles of polycaprolactone (PCL). The solvent evaporation method was used for the copper-quercetin (Cu-Q) complex formation, and their PCL nanoparticles (PCL-NPs, Q-PCL-NPs, and Cu-Q-PCL-NPs) were prepared by the high-pressure homogenization method. Synthesis of nanoparticles was confirmed by their physicochemical and antibacterial properties of quercetin against Gram-positive as well as Gram-negative bacteria.

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Atherosclerosis and its complications are major causes of cardiovascular morbidity and death. Apart from risk factors such as hypercholesterolemia and inflammation, the causal molecular mechanisms are unknown. One proposed causal mechanism involves elevated levels of reactive oxygen species (ROS).

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Older individuals are more vulnerable to severe coronavirus disease 2019 and medical complications. Vaccination stands as an efficient and safe vanguard against infection. However, negative attitudes and perceptions pertaining to available vaccines might hinder community inoculation.

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The dielectric constant of CCTO materials can be as high as 10, which makes it suitable for use in electronic devices but the high dielectric loss limits its application. In this paper, a series of Sr and Zr co-doped CCTO ceramics having the formula CaSrCuTiZrO ( = 0.1, 0.

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In the present work, nonwoven cotton fabric was modified for antibacterial applications using low-cost and eco-friendly precursors. The treatment of fabric with alkali leads to the formation of active sites for surface modification, followed by dip coating with silver nanoparticles and chitosan. The surface was chlorinated in the next step to transform amide (N-H) groups in chitosan into N-halamine (N-Cl).

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Fluorescent sensing of temperature in nanoscale regions has many advantages and applications in the biological field. Herein, blue emitting carbon dots (CDs) are designed and successfully developed using a one step hydrothermal method. As synthesized CDs exhibit temperature dependent photoluminescent (PL) intensity and PL decay lifetime over the physiological temperature ranging from room temperature (RT) to 70 °C.

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Article Synopsis
  • The rise of multidrug-resistant bacteria emphasizes the urgent need for new antimicrobial compounds to tackle healthcare issues and reduce the negative impacts of traditional antibiotics on human health.
  • This review focuses on the recent advancements in developing natural product-based nano-antibiotics, specifically using flavonoids, peptides, and cationic biopolymers with metal/metal oxide nanoparticles to combat resistant strains.
  • It highlights the effectiveness of these functionalized nanoparticles against various pathogenic bacteria, detailing their minimal inhibitory concentrations and mechanisms of action, while also suggesting future directions for in vivo applications.
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Nanotheranostics is an emerging frontier of personalized medicine research particularly for cancer, which is the second leading cause of death. Supramolecular aspects in theranostics are quite allured to achieve more regulation and controlled features. Supramolecular nanotheranostics architecture is focused on engineering of modular supramolecular assemblies benefitting from their mutable and stimuli-responsive properties which confer an ultimate potential for the fabrication of unified innovative nanomedicines with controlled features.

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Current research was conducted to explore the effects of liquiritoside on the growth and physiochemical features of Chinese flowering cabbage ( subsp. ) under lead (Pb) stress. Lead stressed plants exhibited decreased growth parameters, chlorophyll, and carotenoid contents.

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Article Synopsis
  • The COVID-19 pandemic has posed significant challenges to global healthcare, prompting a search for better treatment options alongside existing FDA-approved therapies.
  • The clinical management of COVID-19 involves infection prevention and supportive care, such as oxygen therapy and mechanical ventilation, while emergency protocols have been established to expedite patient access to potential treatments.
  • This manuscript explores the potential of using short-interfering RNA (siRNA) for targeting and degrading the SARS-CoV-2 genome, highlighting delivery methods using FDA-approved nanoparticulate systems that could be formulated as inhalable aerosols.
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During the current study, the effects of magnesium oxide nanoparticles (5 mmol/L) were observed on the growth and mineral nutrients of under lead (Pb) stress. The results demonstrated that Pb stress decreased the growth and photosynthetic rate of plants. Furthermore, Pb stressed plants showed decreased uptake of mineral nutrients including Zn, Na, Fe, K, Ca, Mg, K, and Cu.

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Currently, producing safe agricultural commodities from the crop plants cultivated in the soil with increasing heavy metal toxicity is a gigantic challenge in front of researchers. Heavy metals are absorbed and translocated in the crop plants and then transferred to every downstream consumer of the food chain, including humans, causing serious disorders and ailments. The current research presents a combined schematic application of iron nanoparticles (Fe-NPs) and/or silicon (Si), to mitigate cadmium (Cd) stress in Lima bean (Phaseolus lunatus).

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The roots of spp. have been utilized in Traditional Chinese medicine (TCM) for thousands of years. Non-traditional (aerial) parts constitute a large portion of the biomass of Glycyrrhiza plants and are mostly discarded after harvesting the roots and rhizomes.

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Article Synopsis
  • Cotton leaf curl disease (CLCuD) severely impacts cotton production in countries like Pakistan, leading to annual losses of around 2 billion USD due to its association with multiple begomoviruses and a specific betasatellite.
  • The study developed a loop-mediated isothermal amplification (LAMP) assay to quickly and effectively detect CLCuD, using specifically designed primers for better sensitivity.
  • The optimized LAMP assay can detect as low as 22 copies of DNA, and its adaptation for colorimetric and real-time applications enables rapid field detection, potentially reducing economic losses and supporting the economies of affected regions.
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  • The study investigates the impact of the phytohormone karrikin (KAR) on the absorption and movement of a pollutant (BDE-28) in plants, specifically under conditions of cadmium (Cd) exposure and high temperature.
  • KAR application post-germination significantly improved the growth and health of Brassica alboglabra by reducing the absorption and translocation of BDE-28 and mitigating the harmful effects of Cd and heat stress.
  • The findings suggest that KAR enhances plant resilience by improving membrane stability, boosting antioxidant defenses, and promoting effective pollutant removal.
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High stability and water solubility of fluorescent nanomaterials are considered key factors to evaluate their feasibility for fundamental applications. Herein, water-soluble and thermally stable, green-emitting carbon nanodots (CNDs) have been synthesized via a facile hydrothermal method with an average size of 1.9 nm.

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