scholarly journals Silica from Natural Sources: a Review on the Extraction and Potential Application as a Supporting Photocatalytic Material for Antibacterial Activity

2021 ◽  
Vol 6 (3) ◽  
pp. 144-155
Author(s):  
Annisa Luthfiah ◽  
Yusi Deawati ◽  
M. Lutfi Firdaus ◽  
Iman Rahayu ◽  
Diana Rakhmawaty Eddy
Keyword(s):  
Antibacterial Activity ◽  
Quartz Sand ◽  
Potential Application ◽  
Extraction Process ◽  
Chemical Methods ◽  
Natural Sources ◽  
Green Production ◽  
Good Potential ◽  
Supporting Material ◽  
Photocatalytic Material

Silica has become a popular material due to its high abundance and many advantages in various fields. This material can be produced synthetically and extracted from nature with resultant advantages in the application of green production. Therefore, this article deals with the form of silica extracted from quartz sand, leaves, and agricultural wastes found in nature. The extraction process from various sources would be described using thermal, biological, and chemical methods. This review also highlights the potential application of silica as a photo catalytic antibacterial-supporting material and discusses its role in increasing the effectiveness of the process. The discussion was continued with research on this procedure, where synthetic auxiliary materials were compared to the extracted silica. Furthermore, results obtained indicated that the extracted material had very good potential as a photocatalyst adjunct in its application in the antibacterial field.

Design, Synthesis and Docking Studies of Some Novel Fluoroquinolone Compounds with Antibacterial Activity

2018 ◽  
Vol 69 (4) ◽  
pp. 815-822 ◽  
Author(s):  
Lucia Pintilie ◽  
Amalia Stefaniu ◽  
Alina Ioana Nicu ◽  
Maria Maganu ◽  
Miron Teodor Caproiu
Keyword(s):  
Antimicrobial Activity ◽  
Antibacterial Activity ◽  
Molecular Docking ◽  
Drug Discovery ◽  
Elemental Analysis ◽  
Docking Studies ◽  
Receptor Protein ◽  
Chemical Methods ◽  
Design Synthesis ◽  
Gram Negative

A new series of fluoroquinolone compounds have been obtained by Gould-Jacobs method. The compounds have been characterized by physic-chemical methods (elemental analysis, FTIR, NMR, UV-Vis) and by antimicrobial activity against Gram-positive and Gram-negative microorganisms. For the synthesized compounds have been performed calculations of characteristics and molecular properties, using Spartan�14 Software from Wavefunction, Inc. Irvine, CA. and molecular docking studies using CLC Drug Discovery Workbench 2.4 software, to identify and visualize the most likely interaction ligand (fluoroquinolone) with the receptor protein.

Antibacterial activity assessment of eyeliner extracted from natural sources (castor oil & sandalwood)

2017 ◽  
Vol 8 (3) ◽  
Author(s):  
T. APAR NA ◽  
N. JYO THI ◽  
M. KEZIA ELIZABETH ◽  
D.S.N. PRAVEENA ◽  
K. SWE THA ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Castor Oil ◽  
Natural Sources ◽  
Activity Assessment

Enhanced Negative Thermal Expansion Property Deduced by the Breaks of Superstructure

2021 ◽  
Vol 13 (4) ◽  
pp. 556-562
Author(s):  
Niu Zhang ◽  
Ming-Yi Wu ◽  
Ya-Ming Liu ◽  
Meng-Jie Yang ◽  
Ming-Ju Chao ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Thermal Expansion ◽  
Wide Temperature Range ◽  
Potential Application ◽  
Negative Thermal Expansion ◽  
Thermal Expansion Property ◽  
Expansion Property ◽  
Good Potential ◽  
Nested Structure

The HfV2O7/HfMo2O8 composite were prepared in situ. The phase, structure and thermal expansion property were analyzed. The results indicate the composite consist of cubic HfV2O7 and hexagonal HfMo2O8. The two types of structures were coexisted and mixed uniformly, and interacted with each other. The mutual nested structure suppressed the formation of 3×3×3 superstructure in HfV2O7 (RT) introduced by the reaction in situ. The promoted coupled rotation of quasi-rigid polyhedron units could enhance the negative thermal expansion (NTE) property. The HfV2O7/HfMo2O8 composite exhibits excellent NTE property from 250 to 673 K (at least) with CTE -3.09 × 10-6 K-1. The good NTE property and thermal stability over a wide temperature range, especially near the RT range, bring a good potential application in designing zero thermal expansion materials.

Extraction of 2-Acetyl-1-Pyrroline (2AP) in Pandan Leaves (Pandanus Amaryllifolius Roxb.) Via Solvent Extraction Method: Effect of Solvent

2014 ◽  
Vol 67 (2) ◽  
Author(s):  
Norzita Ngadi ◽  
Noor Yahida Yahya
Keyword(s):  
Solvent Extraction ◽  
Extraction Method ◽  
Extraction Process ◽  
Natural Sources ◽  
Effect Of Solvent ◽  
Method Effect ◽  
Solvent Extraction Method ◽  
Pandanus Amaryllifolius

Pandan (Pandanus amaryllifolius Roxb.) leaves are widely used in Malaysia as a source of natural flavoring.  The major compound contributing to the characteristic flavour of Pandan is 2-acetyl-1-pyrroline (2AP). As the consumer requirement for use of natural flavours, extraction of components from natural sources has been sought. In this study, solvent extraction of 2AP from Pandan leaves was performed. The effect of solvent used during extraction process (i.e. methanol, ethanol, propanol) towards the yield of 2AP was investigated. The presence of 2AP was determined using GCMS. The results obtained showed that ethanol was the best solvent to extract 2AP from Pandan leaves compared to methanol as higher 2AP peak arises from ethanol chromatogram.  However there is no 2AP detected when propanol was used as solvent.  It is believed that polarity of the solvent plays an important role in the extraction of 2AP.

scholarly journals A STRATEGY FOR DETERMINING THE CHEMICAL COMPOSITION OF RICE STRAW

2020 ◽  
Vol 54 (9-10) ◽  
pp. 983-991
Author(s):  
MAHESHANI P. A. NANAYAKKARA ◽  
WALAGEDARA G.A. PABASARA ◽  
ADIKARI M.P.B. SAMARASEKARA ◽  
DON A.S. AMARASINGHE ◽  
LALEEN KARUNANAYAKE
Keyword(s):  
Rice Straw ◽  
Research Work ◽  
Extraction Process ◽  
Chemical Extraction ◽  
Cellulose Content ◽  
Sri Lankan ◽  
Asian Countries ◽  
Chemical Methods ◽  
Rice Varieties ◽  
Wet Chemical

As rice is the staple food of most Asian countries, rice straw has become one of the largest agricultural wastes in Asia. It has not been subjected to adequate value additions yet. However, it has excellent potential to be converted to valuable materials, as it contains a significant amount of cellulose. Therefore, it would be beneficial in many ways to identify the cellulose yields of straws of different rice varieties. In general, the cellulose content of biomass is determined by wet chemical methods. Though these methods are accurate, they are not convenient to use under industrial conditions. This research work focuses on investigating the potential of thermal analysis as an alternative way to predict cellulose yields. For the study, rice straws of most frequently cultivated traditional Sri Lankan rice varieties: Suwandel and Raththal, as well as technically modified Sri Lankan rice varieties: BG300 and BG352, were selected. The results obtained by the proposed method were validated by an established three-step chemical extraction process.

Graphene oxide and sulfonated polyanion co-doped hydrogel films for dual-layered membranes with superior hemocompatibility and antibacterial activity

2016 ◽  
Vol 4 (10) ◽  
pp. 1431-1440 ◽  
Author(s):  
Chao He ◽  
Zhen-Qiang Shi ◽  
Chong Cheng ◽  
Hua-Qing Lu ◽  
Mi Zhou ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Graphene Oxide ◽  
Potential Application ◽  
Co Doped ◽  
Hydrogel Films

GO based dual-layered membranes with superior hemocompatibility and antibacterial activity have potential application for clinical hemodialysis and many other biomedical therapies.

scholarly journals Semi-bionic Extraction Process and Antibacterial Activity against Salmonella goose of Compound Chinese Medicine Dahuang Qinyu San

2021 ◽  
Vol 71 (2) ◽  
Author(s):  
Hatungimana Françoise ◽  
Hongjun Wang
Keyword(s):  
Antibacterial Activity ◽  
Ph Value ◽  
Design Method ◽  
Uniform Design ◽  
Extraction Process ◽  
Chinese Herbs ◽  
Optimal Conditions ◽  
Liquid Ratio ◽  
Microdilution Method ◽  
Broth Microdilution Method

Various classical Chinese medicines have shown their efficiency in curing various infectious diseases. Among them, Dahuang Qinyu San (DQS) found in the Chinese Veterinary Pharmacopoeia is composed of three kinds of Chinese herbs: rhubarb, Scutellaria baicalensis, and Outtuynia cordata. Due to its urgent need in human health and its effectiveness, a semi-bionic extract of Dahuang Qinyu San (SEDQS) was studied to evaluate its optimal extraction conditions and investigate its antibacterial activity against Salmonella goose. The U5 (53) uniform design method was used to investigate the effects of three independent variables, including pH value (X1), solid-to-liquid ratio (X2), and extraction time (X3), on the composite score (Y) of the extract rate and the MIC, using the semi-bionic extraction process. The broth microdilution method was also used to determine the minimum inhibitory concentration (MIC) against Salmonella goose. After 30 minutes of extraction, the optimal conditions for SEDQS were found to be pH 8.3 and a solidto-liquid ratio of 1: 40. Under these optimal conditions, the extraction rate was 43.66 % and the MIC was 9.10 mg/ml, which indicates antibacterial efficacy against Salmonella goose.

scholarly journals ANTIBACTERIAL ACTIVITY FOR MULTI DRUG RESISTANCE (MDR) BACTERIA BYSEA CUCUMBER Stichopus vastus EXTRACT FROM KARIMUNJAWA ISLANDS – INDONESIA

2018 ◽  
Vol 9 (2) ◽  
pp. 695-707 ◽  
Author(s):  
Delianis Pringgenies ◽  
Ali Ridlo ◽  
Nerva Sembiring
Keyword(s):  
Drug Resistance ◽  
Antibacterial Activity ◽  
Sea Cucumber ◽  
Inhibition Zone ◽  
Extraction Process ◽  
Sensitivity Test ◽  
Gas Chromatography Mass Spectrometry ◽  
Diffusion Method ◽  
Multi Drug Resistance ◽  
Bacterial Sensitivity

The study aims to explore the antibacterial activity of Stichopus vastus against pathogenic MDR bacteria. Analysis of samples of sea cucumbers included extraction, fractionation, and analysis of bacterial sensitivity test Gas Chromatography-Mass Spectrometry (GC-MS), the extraction process is carried out by solid-liquid extraction method. Fractionation was done with Open-Column Chromatography (OCC). Sensitivity test of bacteria was done using an agar diffusion method according to the Kirby-Bauer (Ref). The study revealed that from 5 species MDR bacteria, which are Coagulant negative stapylococi (CNS), E. coli, Enterobacter 5, Klebsiella sp. dan Pseudomonas sp. There are two MDR bacteria had the most sensitive responses by the extract of sea cucumber, which were Enterobacter-5 and Klebsiella sp. The two bacteria were tested against five bioactive fractions obtained from OCC. Fraction criteria-2 had the highest antibacterial activity against Enterobacter-5 and Klebsiella sp, with serial concentration of 20 µg ∙ disc–1, 40 µg. disc–1 and 80 µg. disc–1.  Largest inhibition zone were obtained from 80 µg. disc–1 againts the two bacteria were (14.73 ± 0.48) mm and (11.22 ± 0.85) mm respectively.  GC-MS Analysis revealed that fraction criteria-2 had (or consisted of) cyclohexhane, ethanol, butanoic and pentanoic acids. Keywords: antibacterial activity, multi drug resistance (MDR), sea cucumber, Stichopus vastus

scholarly journals Influence of macerating enzyme - Cellulase on the extraction of valuable compounds: Carotenoid and Camptothecin

2018 ◽  
Vol 9 (1) ◽  
pp. 115 ◽  
Author(s):  
Sujatha Natarajan ◽  
Sangilimuthu Alagar Yadav ◽  
Sowmya Priya Manoharan
Keyword(s):  
Aspergillus Niger ◽  
Sweet Potato ◽  
Extraction Process ◽  
Natural Sources ◽  
Cellulase Enzyme ◽  
Anti Cancer ◽  
Yield Quality ◽  
Valuable Compounds ◽  
Important Drug

Macerating enzymes breaks long chain compounds during maceration for extraction of industrially important phytomolecules. Cellulase is an important class of enzyme which helps in the extraction process of phytomolecules such as carotenoids, camptothecin from their natural sources as macerating enzyme. The extraction of phytoconstituents like carotenoids, camptothecin holds high commercial value. The uses of macerating enzymes help to the extraction process of phytomolecules and increase its yield. Quality of the product is also improved in terms of stability, texture and viscosity. Camptothecin is an important drug with potential anti-cancer activity. In this work, the effect of cellulase on the extraction of carotenoid from carrot, tomato and sweet potato have been studied. As a pioneer work, the production of camptothecin from endophytic fungi Aspergillus niger has been carried out using cellulase. The quantitative analysis of pharmaceutical important phytomolecules such as carotenoids and camptothecin were performed using UV-Visible spectrophotometer, HPLC with respective standard compounds. Carotenoid extraction was made from tomato, carrot and sweet potato with cellulose enzyme found 2.5±0.25µg/g, 2.2 ±0.18µg/g, 18± 1.75 µg/g respectively. Carotenoid extracted from carrot using enzyme yielded 1.47 times higher amount of carotenoid than that of without enzyme. Carotenoid extracted from tomato, showed the maximum difference of being 7.3 times higher with enzyme than without enzyme. The another industrially important phytomolecule camptothecin extraction was made from Aspergillus niger with cellulase enzyme yielded 0.5512 mg/g which is more than the camptothecin, extracted without enzyme (0.175 mg/g). Thus, it was observed that the use of cellulase enhanced the yield of both carotenoid and camptothecin from natural sources such as plants and fungi. Keywords: Camptothecin; Carotenoid; Cellulase enzyme; Extraction; HPLC

scholarly journals New Iridoid from Aerial Parts of Mussaenda Roxburghii

2012 ◽  
Vol 7 (1) ◽  
pp. 1934578X1200700 ◽  
Author(s):  
Utpal Chandra De ◽  
Ranjit Ghosh ◽  
Sanjib Chowdhury ◽  
Biswanath Dinda
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
2D Nmr ◽  
Dilution Method ◽  
Chemical Methods ◽  
Aerial Parts ◽  
Broth Dilution

A new iridoid, shanzhiol (1), was isolated from the aerial parts of Mussaenda roxburghii. The structure was established by spectroscopic (including 2D NMR) and chemical methods. Shanzhiol (1) showed mild antibacterial activity against both Staphylococcus aureus and Escherichia coli with a MIC of 100 μg/mL by the broth dilution method.

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