Thermo analytical study of phase transformation of TiO2 nanoparticles prepared using mono and di α-hydroxy acid water-soluble precursor by hydrothermal technique

Background: Desmodium velutinum (Fabaceae) is one of the wild edible plants used traditionally to treat diarrhoea, haematuria, infertility and also externally used to treat scorpion bites. Though various parts of the plant have been used for therapeutic purpose, panchanga of the plant has not been studied for its Pharmacognostical and phytochemical characteristics in detail, following scientific parameters. Hence in the present study Desmodium velutinum whole plant has been studied for its pharmacognostical and phytochemical characters and compared with commonly used species Desmodium gangeticum. Methods: Whole plant of Desmodim velutinum was collected from Paikmal, Odisha and Desmodium gangeticum was collected from Junagarh, Gujarat in the month of November 2019 following good collection practices and shade dried. Pharmacognostical study and analytical study were performed following standard pharmacopoeial procedures. Results: Whole plant (Panchanga) of former is sweetish and latter is bitter. Powder microscopy of Desmodium gangeticum showed presence of rhomboidal crystals and lignified annular and spiral vessels. Desmodium velutinum showed presence of prismatic crystals and lignified pitted vessels. Physico-chemical analysis showed higher loss on drying in Desmodium gangeticum, and higher water soluble extractive values of Desmodium velutinum. Phytochemical estimation showed the presence of Proteins, tannins, and carbohydrates in both samples. HPTLC study showed similar Rf value 0.82 and 0.94 at 254 and 0.03 and 0.41 at 366nm. Conclusion: Basing upon the analytical and microscopic similarities Desmodium velutinum may be considered as substitute of Desmodium gangeticum

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Phyto Pharmacognostic Study of Lagerstroemia speciosa - An Analytical Study

Journal of Ayurveda and Integrated Medical Sciences (JAIMS) ◽

10.21760/jaims.5.5.29 ◽

2020 ◽

Vol 5 (05) ◽

pp. 206-213

Author(s):

Jyothi S. Murthy ◽

B. R. Lalitha ◽

Aahalya Sharma

Keyword(s):

Analytical Study ◽

Microscopical Study ◽

Water Soluble ◽

Lower Epidermis ◽

Calcium Oxalate Crystals ◽

Phytochemical Study ◽

Lagerstroemia Speciosa ◽

Anomocytic Stomata ◽

Leaf Powder ◽

Sugar Levels

Lagerstroemia speciosa (L.) Pers (Hindi - Jarul, Taglog - Banaba) a member of Lythraceae family is found all over India, specially in Bengal, Assam and Deccan Peninsula. The leaves of L. speciosa is widely used for lowering blood sugar levels in Philippines, Japan and Taiwan. Pharmacognostical investigation of leaves of L. speciosa was done by evaluating its morphological, microscopical studies, Physicochemical and phytochemical parameters. Rasa Nirdharana was done. Microscopical study revealed presence of epidermal cells contained clusters of rosette aggregate calcium oxalate crystals and few cells were mucilaginous. Lower epidermis showed the presence of anomocytic stomata. Physical constants of leaf powder showed, loss on drying - 3.8%, total ash - 6.7%, acid insoluble ash - 1.039%, water soluble extractive value - 8.88%, alcohol soluble extractive value - 4.49% and pH - 5.75. Preliminary phytochemical study revealed the presence of alkaloids, flavonoids, saponins, triterpenes, tannins, proteins and iron. Rasa Nirdharana confirmed the leaves are Kashaya in Rasa. The Pharmacognostical study was useful for authentication of leaves of Lagerstoemia speciosa.

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New water-soluble complexes of titanium with amino acids and their application for synthesis of TiO2 nanoparticles

Journal of the Ceramic Society of Japan ◽

10.2109/jcersj2.116.578 ◽

2008 ◽

Vol 116 (1352) ◽

pp. 578-583 ◽

Cited By ~ 26

Author(s):

Makoto KOBAYASHI ◽

Valery PETRYKIN ◽

Koji TOMITA ◽

Masato KAKIHANA

Keyword(s):

Amino Acids ◽

Tio2 Nanoparticles ◽

Water Soluble ◽

Soluble Complexes

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Preparation and characterization of highly blue emitting fluorescent carbon nano-dots using Pongammia pinnata fresh leaves

10.21203/rs.3.rs-874336/v1 ◽

2021 ◽

Author(s):

Govindaraju K ◽

K. Vijai Anand ◽

S. Muthamilselvan ◽

M. Kannan ◽

M. Elanchezhiyan

Keyword(s):

Electron Microscopy ◽

Water Soluble ◽

Hydrothermal Technique ◽

Transmission Electron ◽

Vis Spectroscopy ◽

Ft Ir ◽

Average Size ◽

Soluble Carbon ◽

Ft Ir Spectroscopy

Abstract In this study, a simple environmental benign approach have been adopted for the preparation of highly luminescent (blue emitting) water soluble carbon nano-dots using Pongammia pinnata (Pp) leaves via hydrothermal technique. The prepared Pp-carbon nano- dots were characterized using UV-vis spectroscopy, fluorescence spectroscopy, Fourier transform infrared (FT-IR) spectroscopy, transmission electron microscopy (TEM) and dynamic light scattering (DLS) measurements. The Pp-carbon nano-dots are spherical in shape with an average size of 32 nm.

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Controlled Synthesis and Microstructural Properties of Sol-Gel TiO2 Nanoparticles for Photocatalytic Cement Composites

Nanomaterials ◽

10.3390/nano9010026 ◽

2018 ◽

Vol 9 (1) ◽

pp. 26 ◽

Cited By ~ 10

Author(s):

Elena Cerro-Prada ◽

Sara García-Salgado ◽

M.Angeles Quijano ◽

Fernando Varela

Keyword(s):

Particle Size ◽

Phase Transformation ◽

Tio2 Nanoparticles ◽

Anatase Phase ◽

Sol Gel ◽

Titanium Isopropoxide ◽

Titania Nanoparticles ◽

Structural Defects ◽

Microstructural Properties ◽

Anatase Nanoparticles

Titania nanoparticles are intensely studied for photodegradation applications. Control of nanoscale morphology and microstructural properties of these materials is critical for photocatalytic performance. Uniform anatase-type TiO2 nanoparticles were prepared by the sol-gel process using titanium isopropoxide as precursor. Controlled annealing up to 400 ℃ established crystallization and particle size ranging between 20 and 30 nm. Detailed thermal examination reveals that anatase phase transformation into rutile is affected by the annealing temperature and by the initial particle size. The anatase to rutile phase transformation occurs in the nanoparticles at 550 ℃. The Total Reflection X-ray Fluorescence (TXRF) study of the anatase nanoparticles shows a shift towards higher energy in the Ka Ti line of 10 eV, related to structural defects. These features were discussed in the photocatalytic behavior of several cement-based materials modified with the so-prepared anatase nanoparticles. The photocatalytic activity of the anatase-type TiO2/cement mortar system is evaluated from the degradation of Methylene Blue (MB) under UV irradiation, monitored through the absorbance at 665 nm. The results show that the photocatalytic composites exhibit up to 76.6% degradation efficiency. Mechanical testing of the nano-TiO2 modified cementitious composites evinces a moderate reinforcement of the strength properties at long ages.

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The role of Sn–Fe co-doping on the atomic structure, phase transformation and antibacterial activity of TiO2 nanoparticles

Materials Research Express ◽

10.1088/2053-1591/ab4017 ◽

2019 ◽

Vol 6 (10) ◽

pp. 1050c1 ◽

Cited By ~ 8

Author(s):

Maryam Hosseini ◽

Sajjad Nasiri Khalil Abad ◽

Nasrollah Najibi Ilkhechi ◽

Mahdi Mozammel ◽

Nazenin Eftekhari

Keyword(s):

Antibacterial Activity ◽

Phase Transformation ◽

Tio2 Nanoparticles ◽

Atomic Structure ◽

Co Doping ◽

Structure Phase

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Analytical evaluation of Mrityunjaya Rasa

Journal of Ayurveda and Integrated Medical Sciences (JAIMS) ◽

10.21760/jaims.v2i06.10926 ◽

2017 ◽

Vol 2 (06) ◽

Author(s):

Abhishek Abhishek ◽

Ashok Kumar BN ◽

Sujatha K. ◽

Sunil Kumar

Keyword(s):

Chemical Analysis ◽

Analytical Study ◽

Water Soluble ◽

Analytical Evaluation ◽

Text Book ◽

Classical Text ◽

Physico Chemical

Introduction: Mrityunjaya Rasa is a herbo–mineral formulation mentioned under Jwara Chikitsa in Rasendra Sara Sangraha along with different Anupanas. It is having ingredients like Shudha Hingula, Shudha Gandhaka, Shudha Vatsanabha, Shudha Tankana, Pippali and Maricha which show significant result on various types of fever. Aim: To prepare Mrityunjaya Rasa as per guidelines given in classical text book Rasendra Sara Sangraha and to validate physico-chemical analysis of the sample. Methods: The preparation of Mrityunjaya Rasa was carried out at practical hall, Department of Rasashastra and Bhaishajya Kalpana, Shri Dharmasthala Manjunatheshwara College of Ayurveda, Kuthpady, Udupi, Karnataka. It was subjected to analysis on parameters like organoleptic characters, loss on drying, total ash, acid insoluble ash, water soluble ash, pH, alcohol soluble extractive value, and water soluble extractive value. Results: The results of Analytical study showed specific characteristics which are in accordance with the properties of Mrityunjaya Rasa. Conclusion: The study showed significant results, which proves quality of the drugs and efficacy.

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