Synthesis, Characterization, and Biological Evaluation of Novel Pseudomonas aeruginosa RTAC 11 Synthesized Ag Nanoparticles

2020 ◽  
Vol 18 (9) ◽  
pp. 694-699
Author(s):  
Lavina Temkar ◽  
Ritika Tripathi ◽  
Abhishekh Tiwari ◽  
Navjeet Kaur ◽  
Arivarasan Vishnu Kirthi ◽  
...  
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Spectroscopic Analysis ◽  
Biological Evaluation ◽  
Toxic Chemicals ◽  
Biological Synthesis ◽  
Good Antibacterial Activity ◽  
Vis Spectroscopy ◽  
Nano Size ◽  
Harmful Effects

Biological synthesis of silver nanoparticles (AgNPs) has been an area of research to avoid the harmful effects of the toxic chemicals used in its synthesis on our health and environment. In the present study, a novel strain of Pseudomonas aeruginosa-RTAC 11 isolated from soil was used for the synthesis of AgNPs. Characterization of the synthesized nanoparticles like UV-vis spectroscopy confirmed the synthesis of AgNPs through a signature peak at 420 nm. Fourier Transform Infrared (FTIR) spectroscopic analysis revealed the capping of AgNPs by proteins through signature functional groups. The nano-size of the particles were confirmed using scanning electron microscopy (SEM). The AgNPs showed good antibacterial activity against Escherichia coli ATCC 8739 and Staphylococcus aureus ATCC 6538, thus indicating an excellent antibacterial agent.

scholarly journals Multi-functional effects of textiles dyed with madder roots powder (Rubiatinctoria)

2019 ◽  
Vol 69 (06) ◽  
Author(s):  
DUMITRESCU IULIANA ◽  
IORDACHE OVIDIU GEORGE ◽  
MITRAN ELENA-CORNELIA ◽  
STEFANESCU DANA ◽  
VARZARU ELENA ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Color Fastness ◽  
Iso Standard ◽  
Common Mean ◽  
Good Antibacterial Activity ◽  
Vis Spectroscopy ◽  
Ultraviolet Protection ◽  
Materials Used ◽  
Dyed Fabrics ◽  
Harmful Effects

In this study, 100% cotton knit was premordanted with mimosa tannin and mimosa tannin/alum and dyed with a dyestuff extracted from Madder root. The degree of exhaustion was carry out by UV-Vis spectroscopy. The color fastness to light, wash, rubbing (wet and dry) and perspiration of the mordanted and dyed fabrics were evaluated according to specific ISO standard. The samples were tested for ultraviolet protection and antibacterial activity against Staphylococcus aureus strains. The color fastness to washing and light are poor and the fastness to perspiration and rubbing is moderate. The dyed fabrics demonstrate an excellent UV protective effect and a good antibacterial activity. Even thin, the materials used for summer clothes dyed with madder could provide an effective and common mean to protect the human body against the harmful effects of UV rays.

scholarly journals Biological Synthesis of Cobalt Nanoparticles from Mangifera indica Leaf Extract and Application by Detection of Manganese (II) Ions Present in Industrial Wastewater

2019 ◽  
pp. 1-8 ◽  
Author(s):  
Felicia Uchechukwu Okwunodulu ◽  
Helen Ogechi Chukwuemeka-Okorie ◽  
Francis Chijioke Okorie
Keyword(s):  
Leaf Extract ◽  
Mangifera Indica ◽  
Industrial Effluents ◽  
Cobalt Nanoparticles ◽  
Biological Synthesis ◽  
Cobalt Ions ◽  
Vis Spectroscopy ◽  
Ft Ir ◽  
Average Size

This study was focused on the synthesis of cobalt nanoparticles using Mangifera indica leaf extract and the characterization of the particles via UV–Vis spectroscopy, XRD, FT-IR and SEM. The XRD results showed the formation of cobalt nanoparticles that was crystalline in nature, with an average size of 25—40 nm. The FT-IR analysis of the leaf extract reviewed some functional groups responsible for the reduction of cobalt ions to cobalt nanoparticles while the SEM indicates that the synthesised cobalt nanoparticles possess a cubic, pentagonal and irregular in shape with a smooth surface. Application of colloidal cobalt nanoparticles in detecting Mn2+ ions was discussed which indicated that the absorption of the Mn (II) ions decreased at increased concentration of Mn (II) ions indicating that Mn (II) ion can be detected even at a very low concentration. The minimum and maximum detection limit was found to be 5 and 25 mM of Mn (II) ions, respectively. The obtained results encourage the use of economical synthesis of cobalt nanoparticles in the development of nanosensors to detect the pollutants present in industrial effluents.

Characterization of Chemical Impurities in Glutaraldehyde

1975 ◽  
Vol 33 ◽  
pp. 620-621
Author(s):  
B. J. Grenon ◽  
A. J. Tousimis
Keyword(s):  
Glutaric Acid ◽  
Spectroscopic Analysis ◽  
Aldol Condensation ◽  
Condensation Product ◽  
Amorphous Solid ◽  
Water Soluble ◽  
Impurity Component ◽  
Chemical Impurities ◽  
Soluble Liquid

Ever since the introduction of glutaraldehyde as a fixative in electron microscopy of biological specimens, the identification of impurities and consequently their effects on biologic ultrastructure have been under investigation. Several reports postulate that the impurities of glutaraldehyde, used as a fixative, are glutaric acid, glutaraldehyde polymer, acrolein and glutaraldoxime.Analysis of commercially available biological or technical grade glutaraldehyde revealed two major impurity components, none of which has been reported. The first compound is a colorless, water-soluble liquid with a boiling point of 42°C at 16 mm. Utilizing Nuclear Magnetic Resonance (NMR) spectroscopic analysis, this compound has been identified to be — dihydro-2-ethoxy 2H-pyran. This impurity component of the glutaraldehyde biological or technical grades has an UV absorption peak at 235nm. The second compound is a white amorphous solid which is insoluble in water and has a melting point of 80-82°C. Initial chemical analysis indicates that this compound is an aldol condensation product(s) of glutaraldehyde.

scholarly journals Synthesis, Fabrication, and Characterization of Functionalized Polydiacetylene Containing Cellulose Nanofibrous Composites for Colorimetric Sensing of Organophosphate Compounds

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1869
Author(s):  
A K M Mashud Alam ◽  
Donovan Jenks ◽  
George A. Kraus ◽  
Chunhui Xiang
Keyword(s):  
Solid State ◽  
Hydroxyl Groups ◽  
Colorimetric Sensing ◽  
Electrospinning Technique ◽  
Hazardous Chemical ◽  
Tensile Tester ◽  
Vis Spectroscopy ◽  
Ft Ir ◽  
Landmark Study

Organophosphate (OP) compounds, a family of highly hazardous chemical compounds included in nerve agents and pesticides, have been linked to more than 250,000 annual deaths connected to various chronic diseases. However, a solid-state sensing system that is able to be integrated into a clothing system is rare in the literature. This study aims to develop a nanofiber-based solid-state polymeric material as a soft sensor to detect OP compounds present in the environment. Esters of polydiacetylene were synthesized and incorporated into a cellulose acetate nanocomposite fibrous assembly developed with an electrospinning technique, which was then hydrolyzed to generate more hydroxyl groups for OP binding. Scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FT-IR), Instron® tensile tester, contact angle analyzer, and UV–Vis spectroscopy were employed for characterizations. Upon hydrolysis, polydiacetylene esters in the cellulosic fiber matrix were found unaffected by hydrolysis treatment, which made the composites suitable for OP sensing. Furthermore, the nanofibrous (NF) composites exhibited tensile properties suitable to be used as a textile material. Finally, the NF composites exhibited colorimetric sensing of OP, which is visible to the naked eye. This research is a landmark study toward the development of OP sensing in a protective clothing system.

scholarly journals Characterization of the arcD arginine:ornithine exchanger of Pseudomonas aeruginosa. Localization in the cytoplasmic membrane and a topological model.

1993 ◽  
Vol 268 (8) ◽  
pp. 5417-5424
Author(s):  
J.P. Bourdineaud ◽  
D. Heierli ◽  
M. Gamper ◽  
H.J. Verhoogt ◽  
A.J. Driessen ◽  
...  
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Cytoplasmic Membrane ◽  
Topological Model
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