scholarly journals CARICA PAPAYA MEDIATED GREEN SYNTHESIZED SILVER NANOPARTICLES

2018 ◽  
Vol 10 (3) ◽  
pp. 15
Author(s):  
A. Anbarasu ◽  
P. Karnan ◽  
N. Deepa ◽  
R. Usha
Keyword(s):  
Leaf Extract ◽  
Carica Papaya ◽  
Low Cost ◽  
Nature Study ◽  
Visible Spectra ◽  
Aqueous Leaf Extract ◽  
Shape Controlled ◽  
Crystalline Nature ◽  
Uv Visible ◽  
Green Synthesized Silver Nanoparticles

Objective: The present study was designed to biosynthesize NPs from leaves to study the reducing Ag+ions and stabilizing the particles and confirm AgNP synthesis by using various spectroscopy and microscopic methods.Methods: Bio-inspired AgNPs were rapidly synthesized at room temperature using fresh aqueous leaf extract of Carica papaya. A green and low-cost synthesis was effective in the formation of stable crystalline NPs in the solution. Amine, alkene and alkyl halides groups present in the Carica papaya leaf extract functioned as reducing as well as a stabilizing agent to produce shape controlled AgNPs.Results: SPR confirmed the formation of AgNPs in UV-Visible spectra at 445.7 nm. The XRD result also showed the presence of elemental Ag+as a crystalline nature. Study the functional groups responsible for the bio reduction of Ag+. HE-TEM and FE-SEM with EDX image showed spherical crystalline AgNPs.Conclusion: Hence, the plant-based bio AgNPs could be used in biomedical applications.

scholarly journals Effect of Carica papaya (Linn) aqueous leaf extract on pharmacokinetic profile of ciprofloxacin in rabbits

2017 ◽  
Vol 16 (1) ◽  
pp. 127 ◽  
Author(s):  
Grace E. Ukpo ◽  
Mbang A. Owolabi ◽  
Ngozi O.A. Imaga ◽  
Oluwafunke O. Oribayo ◽  
Akpobomen J. Ejiroghene
Keyword(s):  
Leaf Extract ◽  
Carica Papaya ◽  
Pharmacokinetic Profile ◽  
Aqueous Leaf Extract

PHOTOCATALYTIC DEGRADATION OF METHYLENE BLUE USING IRON OXIDE NANOPARTICLES SYNTHESIZED USING ANNONA MURICATA LEAF EXTRACT

2020 ◽  
pp. 46-51
Author(s):  
BEENA JOSE ◽  
FEMY THOMAS
Keyword(s):  
Electron Microscopy ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Leaf Extract ◽  
Iron Oxide Nanoparticle ◽  
Oxide Nanoparticles ◽  
Annona Muricata ◽  
Aqueous Leaf Extract ◽  
Oxide Nanoparticle ◽  
Uv Visible

Objective: The objective of the present study is the synthesis of iron oxide nanoparticles using Annona muricata aqueous leaf extract, characterization of the synthesized nanoparticles and evaluation of the antibacterial, photocatalytic activity and cytotoxicity. Methods: The iron oxide nanoparticle was synthesized using Annona muricata aqueous leaf extract and the crystal structure of the iron oxide nanoparticle was determined by UV-Visible spectroscopy, Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR). The in vitro cytotoxicity of iron oxide nanoparticles was evaluated using Dalton’s lymphoma ascites cells and the antibacterial assay was conducted using agar well diffusion method. Results: The UV-Visible spectrum of iron oxide nanoparticle showed a maximum absorption peak at 265 nm. This is the XRD pattern of iron oxide nanoparticles exhibited a distinct peak at 26.029 (2θ), accounting for crystal plane (211). SEM images revealed that the synthesized iron oxide nanoparticles were aggregated as irregular sphere shapes with rough surfaces. TEM image reveals the size of the synthesized iron oxide nanoparticles are spherical in shape with an average size of 20 nm. Green synthesized iron oxide nanoparticles using Annona muricata leaf extract effectively degraded methylene blue dye. Conclusion: This study showed that the synthesized iron oxide nanoparticles using Annona muricata aqueous leaf extract exhibited pronounced antibacterial, anticancer and photocatatytic activity and can be used in the textile industry for the purification of water contaminated with carcinogenic textile dyes. It can also be used as an external antiseptic in the prevention and treatment of bacterial infections.

Cellulose Nanofiber as Potential Absorbent Material for Chloride Ion

2021 ◽  
Vol 317 ◽  
pp. 263-269
Author(s):  
Muhammad Syukri Mohamad Misenan ◽  
Nurjahirah Janudin ◽  
Mas Amira Idayu ◽  
Mohd Nor Faiz Norrrahim ◽  
Siti Hasnawati Jamal ◽  
...  
Keyword(s):  
Low Cost ◽  
Cellulose Nanofibers ◽  
Chloride Ion ◽  
Absorption Capacity ◽  
Visible Spectra ◽  
Ft Ir ◽  
Uv Visible ◽  
Hcl Concentration ◽  
Hcl Solution

A simple, low cost and rapid analytical method for determination of HCl concentration after being treated with cellulose and cellulose nanofibers (CNF) is developed. This method is based on color intensity after the HCl solution is doped with sodium iodide (NaI). The color of HCl solution changes from colorless to yellow. The intensity of the color is measured by UV – Visible spectroscopy. The UV-Visible spectra of 0.15 M HCl treated with cellulose and cellulose nanofibers is reduced from its initial concentration. The CNF absorption capacity is higher as compared to cellulose. FT-IR analysis showed that there is interaction between C-H group from the CNF backboned and chloride ion from HCl solution.

Biogenic Gold Nanoparticles and its Antibacterial Activities: Houttuynia Cordata Leaf Extract

2014 ◽  
Vol 1051 ◽  
pp. 392-397
Author(s):  
T.V.M. Sreekanth ◽  
In Yong Eom
Keyword(s):  
Gold Nanoparticles ◽  
Leaf Extract ◽  
Antibacterial Activities ◽  
Gram Negative Bacteria ◽  
Gram Positive ◽  
Houttuynia Cordata ◽  
Gram Negative ◽  
Gram Positive Bacteria ◽  
Visible Spectra ◽  
Uv Visible

Gold nanoparticles (AuNPs) can be prepared in a number of chemical techniques, which are not environmentally friendly. Biosynthesis of nanoparticles by plant extracts is currently under exploitation. In this work, we describe an eco-friendly technique for green synthesis of AuNPs from AuCl4 solution using the Houttuynia cordata leaf extract as reducing agent. The AuNPs were characterized using UV-Visible spectroscopy, SEM, TEM, FTIR and AFM. The UV-Visible spectra indicate a strong plasma resonance that is located at 535 nm. The antibacterial activity of AuNPs was performed on various gram positive and gram negative bacteria. The AuNPs showed more inhibitory activity on gram negative than gram positive bacteria.

Carica papaya: Potential Implications in Human Health

2019 ◽  
Vol 5 (4) ◽  
pp. 321-336
Author(s):  
Dave Heena ◽  
Trivedi Sunil
Keyword(s):  
Human Health ◽  
Scientific Knowledge ◽  
Immune Modulation ◽  
Leaf Extract ◽  
Carica Papaya ◽  
Human Immune System ◽  
Cellular Processes ◽  
Molecular Studies ◽  
Aqueous Leaf Extract ◽  
Type Shift

Background: Carica papaya, a tree-like herb, is cultivated in more than 50 tropical and subtropical countries worldwide. The parts [leaves, fruit (ripe and unripe), seeds and latex] are used as food as well as traditional medicine in several ways for a number of diseases. Papaya, with a variety of phytochemicals like carotenoids, polyphenols, benzyl isothiocynates, benzyl glucosinates, prunasin (cyanogenic substrate), papain and chymopapain, alkaloids, phenolic compounds, flavonoids, vitamins (A, C, E), carotenoids, cyanogenicglucosides, cystatin, and glucosinolates exhibits significant health benefits ranging from digestive to immune modulation. These compounds have antioxidant, chemoprotective, anti-diabetic, anti-bacterial, anti-plasmodial and anti-fungal activities. Papaya aqueous leaf extract was evaluated for immunomodulatory and anti-tumor activities through cytokine modulation with Th1 type shift in human immune system through molecular studies. The platelet augmenting potential of aqueous leaf extract has been reported in numerous clinical studies and deserves special mention. Objective: The scientific knowledge of carica papaya in the post-genomic era including molecular studies and clinical trials is discussed in the review. Methods: The published literature on botany, chemical composition, ethnopharmacology, and uses of papaya in food and medical industry was searched through databases like Pub- Med, Scopus, and Google scholar to comprehend the benefits of Carica papaya for human use with around more than 600 published peer- reviewed papers. Results: Many traditional and novel uses of Carica papaya for the human benefit are detailed in the review that significantly adds to the scientific knowledge of curious readers. Conclusion: Each component of the papaya plant is rich in phytochemicals and is economically important. Most of the phytochemicals are linked to biological functions and influence a variety of cellular processes; hence they have implications in refining human health.

scholarly journals Morphometric Malformations in Fetal Rats Following Treatment with Aqueous Leaf Extract of Carica Papaya

2011 ◽  
Vol 2 (1) ◽  
pp. 18-22 ◽  
Author(s):  
Moses B Ekong ◽  
Mandu U Akpan ◽  
Theresa B Ekanem ◽  
Mfon I Akpaso
Keyword(s):  
Wistar Rats ◽  
Leaf Extract ◽  
Carica Papaya ◽  
Tap Water ◽  
Female Rats ◽  
Preg Nancy ◽  
Young Leaves ◽  
Group A ◽  
Aqueous Leaf Extract ◽  
Continuous Use

Objective: Carica papaya popularly known as papaya or pawpaw is a fruit with diverse nutritional and medicinal properties. The continuous use of the leaf extract as enema by pregnant women necessitated this study on the effect of aqueous extract of the young leaves on the morphometry of the fetuses of pregnant Wistar rats. Material & Methods: Twenty seven sexually matured Wistar rats consisting of eighteen females and nine males, and weighing 180-200g were used for the study. The female rats were assigned equally into three groups of A, B and C. Pregnancies were obtained after the introduction of the males into the female cages overnight. On day 12 of preg-nancy, group A (control) was given sham treatment of tap water, while groups B and C were treated with 60mg/kg and 120mg/kg respectively, of the aqueous leaf extract of C. papaya for seven days (days 12-18 of pregnancy). On day 20 of gestation, the animals were anaesthetized using chloroform and euthanized, and the uteri dissected out to study the fetuses. Results: Results revealed reduced number of viable fetuses, reduced fetal weight, and reduced crown-rump, head, and tail lengths in the group treated with 60mg/kg aqueous leaf extract of C. papaya, while there was resorption of all the fetuses in the group treated with 120mg/kg of the aqueous leaf extract of C. papaya. Conclusion: In conclusion, the aqueous leaf extract of C. papaya at the given dosage in this study is detrimental to developing fetuses, and these effects were dose dependent. Hence, the use of the extract especially during the period of gestation should be discouraged. Key Words: C. papaya; fetus; morphometry; malformation; rats DOI: 10.3126/ajms.v2i1.4028 Asian Journal of Medical Sciences 2 (2011) 18-22

Evaluation of anti-dengue activity of Carica papaya aqueous leaf extract and its role in platelet augmentation

2019 ◽  
Vol 164 (4) ◽  
pp. 1095-1110 ◽  
Author(s):  
Navita Sharma ◽  
Kamla Prasad Mishra ◽  
Sudipta Chanda ◽  
Varun Bhardwaj ◽  
Himanshi Tanwar ◽  
...  
Keyword(s):  
Leaf Extract ◽  
Carica Papaya ◽  
Aqueous Leaf Extract
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