Israa Al-Ogaidi

University of Baghdad · Department of Biotechnology

ZnS, ZnS-Ag nanoparticles were successfully synthesized by Microwave assisted irradiation method using glucose, both as capping agent and as stabilizer. The resulted nanoparticles are characterized using X-ray diffraction (XRD) and UV-vis optical absorption techniques. XRD characterization of nanoparticles verified the crystalline form. The average...

This study included synthesizing silver nanoparticles (AgNPs) in a green method using AgNO3 solution with glucose exposed to microwave radiation. The prepared NPs were also characterized using ultraviolet and visible (UV-vis) spectroscopy and scanning electron microscopy (SEM). The UV/vis spectroscopy confirmed the production of AgNPs, while SEM...

Nanoencapsulation with safe materials improves delivery, stability, and activity of bioactive components. We report a novel safe, and effective method for the development of encapsulated antimicrobial essential oils (EO) for topical creams and gels. The method developed features three aspects that, to our knowledge, had not been previously demonstr...

A novel, safe and efficient method was developed to encapsulate a blend of essential oils (EOs) into biodegradable nanoparticles (NPs). The biodegradable and biocompatible nanoparticles were made from chitosan (CH) and lecithin (LE) . The quality of the essential oils was verified using gas chromatography/mass spectrometry (GC/MS). The synthesis of...

The aims of current study to estimate the effectiveness of Silver Nanoparticles (AgNPs) and 405 nm Diode laser irradiation with power of 100mW on the growth of Gram-positive Methicillin Resistant Staphylococcus aureus bacteria (MRSA) and Gram-negative Pseudomonas aeruginosa. UV-Vis spectrophotometer was used to confirm the monodispersity of Silver...

This study focused on the synthesis of chitosan-alginate (CH-ALg) nanoparticles by ionotropic gelation technique using sodium alginate and calcium chloride. The particle size of the synthesized nanoparticles was confirmed by atomic force microscope (AFM) and it was 61.9 nm. While the nature of functional groups present in chitosan nanoparticles was...

This study discusses the synthesis, characterization, and activity of silver nanoparticles, along with silver graphene oxide, against pathogenic bacteria. Silver nanoparticles are prepared by laser ablation and fabricated with silver graphene oxide. The synthesized silver nanoparticles and silver graphene oxide were characterized through UV-Vis spe...

Abstract: This study explains the biosynthesis, characterization, evaluation of the antibacterial activity and cytotoxicity of zinc oxide nanoparticles (ZnO NPs) prepared by a low-cost and simple procedure. Bio-inspired ZnO NPs were synthesized with the aid of a novel, non-toxic, ecofriendly biological material namely; Banana Peels Extract (BPE). Q...

In this study, silver nanoparticles (AgNPs) have been successfully synthesized using green and black tea in a facile andinexpensive environmentally friendly process. The green and black tea extracts were verified to contain phytochemicalssuch as alkaloids, flavonoids, saponins, phenols and steroids. These phytochemicals in green and black tea serve...

Silver nanoparticles (AgNPs) are broadly designed for various application. In the current research silver nanoparticles (AgNPs) have been examined for their poisonous outcome on human lymphocyte and chicken embryo fibroblast cell line. AgNPs were synthesized by a simple and easy method from AgNO 3 solution with glucose exposed to microwave radiatio...

This is an Open Access Journal / article distributed under the terms of the Creative Commons Attribution License (CC BY-NC-ND 3.0) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. All rights reserved. Biologically synthesis of metallic (AgNPs) nanoparticles was used instead...

A safe, rapid, and easy-to-scale-up method of loading vitamin C (vit C) into chitosan-alginate nanoparticles (CH-Alg NPs) was established. The CH-Alg/vit C NPs were subjected to bath sonication to achieve their nanosize. Transmission electron microscopy of CH-Alg/vit C NPs stained with 1% neutral phosphotungstic acid showed NPs with sizes between 2...

As a result of increasing resistance toward known antimicrobials and appearing of MDR isolates over world; and since is hard to develop new groups of antimicrobial agents with enough safety and effectiveness, for all that alternative methods were followed to get the desired goal, hence, alternative antimicrobial agents were developed to overcome th...

The solutions of sodium chloride and hydrogen chloride have a high effect on shifting the peak of surface plasmon resonance of gold nanoparticles to the near infra-red region. The gold nanoparticles were synthesized by chemical technique. sodium chloride and hydrogen chloride solutions were added to the colloidal gold nanoparticles. sodium chloride...

In the current study, synthesis and characterization of Zinc oxide nanoparticles (ZnONPs) and its application as anti-pathogenic bacteria were investigated. ZnO which has been prepared by using aqueous of green tea leaves extract (Camellia sinensis) as a reducing agent. The wavelength range was measured by Ultraviolet–visible spectroscopy (UV-Vis)...

In the current study, synthesis and characterization of silver nanoparticles (AgNPs) before and after functionalization with ampicillin antibiotic and their application as anti-pathogenic agents towards bacteria were investigated. AgNPs were synthesized by a green method from AgNO 3 solution with glucose subjected to microwave radiation. Characteri...

Accessory gene regulator (agr) operon is the central transcriptional global regulatory system of Staphylococcus aureus; the agr locus is perceived as a part of the center genome of the S. aureus chromosome, responsible of controlling the virulence factors and cell-wall components. Considered the important quorums sensing system of S. aureus, agr ac...

In this study, silver nanoparticles (AgNPs) have been successfully synthesized using green and black tea in a facile and inexpensive environmentally friendly process. The green and black tea extracts were verified to contain phytochemicals such as alkaloids, flavonoids, saponins, phenols and steroids. These phytochemicals in green and black tea ser...

In this study, silver nanoparticles (AgNPs) have been successfully synthesized using green and black tea in a facile and inexpensive environmentally friendly process. The green and black tea extracts were verified to contain phytochemicals such as alkaloids, flavonoids, saponins, phenols and steroids. These phytochemicals in green and black tea ser...

Isolation and identification of bacterial isolates were carried out according to the morphology and biochemical characteristics on one hundred and twenty stool specimens collected from children under five years old via using biochemical tests and Api 20E compact system for further confirmation. Bacterial isolates were distributed as (34.48, 20.68,...

In this study, silver nanoparticles (AgNPs) have been successfully synthesized using green and black tea in a facile and inexpensive environmentally friendly process. The green and black tea extracts were verified to contain phytochemicals such as alkaloids, flavonoids, saponins, phenols and steroids. These phytochemicals in green and black tea ser...

silver Nanoparticales

This study investigated the immunological adjuvant effect of silver nanoparticles AgNPs which have been prepared and characterized in previous study. The silver nanoparticales were synthesized by biological method using green (G) and black (B) tea as reducing agent. AgNPs were 50nm and 30 nm respectively with like spherical in shape. The effect of...

Sensors applications represent one of the most promising commercial products developments. The Global Industry Analysts predicted that in 20171, the global market for biosensors in medical diagnostics would reach US$16.5 billion. The increased R&D focused on highly accurate real-time diagnosis using biosensors and the demand for biosensors based eq...

Sensors applications represent one of the most promising commercial products developments. The Global Industry Analysts predicted that in 2017 [1] , the global market for biosensors in medical diagnostics would reach US$16.5 billion. The increased R&D focused on highly accurate real-time diagnosis using biosensors and the demand for biosensors base...

The gold nanostar@silica core-shell nanoparticles conjugated with glucose oxidase (GOx) enzyme molecules have been developed as the surface-enhanced Raman scattering (SERS) biosensor for label-free detection of glucose. The surface-immobilized GOx enzyme catalyzes the oxidation of glucose, producing hydrogen peroxide. Under laser excitation, the pr...

An immunoassay has been developed for the detection of the ovarian cancer biomarker CA-125 by utilizing the chemiluminescence resonance energy transfer to graphene quantum dots. This biosensor shows a wide linear range from 0.1 U mL(-1) to 600 U mL(-1) with a limit of detection of 0.05 U mL(-1) for CA-125 in a buffer solution.

An enzyme-linked immunoassay based on dual signal transduction mechanisms has been developed for detection of ovarian cancer biomarker CA125. The immunoassay uses a nanoelectrode array (NEA) chip and absorbance methods for the dual detection. The NEA is used to confirm the optical detection of CA125 that is carried out in a high-binding 96-well pla...

The present study was designed to detect both CA125 and glucose biomarkers by using nanoparticles based sensor. An enzyme-linked immunoassay based on dual signal detection has been developed for the detection of ovarian cancer biomarker CA125. The sandwich-type immunoassays use nanoelectrode array (NEA) chip and absorbance methods for the dual dete...

Heavy metal pollution is one of the most serious environmental problems, which undermines global sustainability. Many efforts have been made to develop portable sensors for monitoring heavy metals in the environment. Incorporation of nanomaterials and nanostructures into sensors leads to significant improvement in the performance of devices in term...

Summary A total of 75 different clinical samples were collected from different hospitals in Baghdad which are Al- Kadhemyia hospital ,Al- Keindy general hospital , and Al- Wasiti hospital in addition to Central Health Laboratory . 50 samples from wounds ,12 samples from patients with osteomyelitis , 8 samples from urine , 5 samples from bacteremia...