scholarly journals Pattern Recognition of Melaleuca cajuputi Powell Essential Oils Fingerprint in Terengganu, Malaysia Using Chemometric Approach

2018 ◽  
Vol 7 (3.14) ◽  
pp. 132
Author(s):  
Mohd Hanif Abdullah ◽  
Hafizan Juahir ◽  
Fathurahman Lananan ◽  
Mohd Khairul Amri Kamarudin ◽  
Adiana Ghazali ◽  
...  
Keyword(s):  
Essential Oil ◽  
Functional Group ◽  
Equation Model ◽  
Sampling Location ◽  
Ftir Analysis ◽  
Hierarchical Agglomerative Cluster ◽  
Chemometric Technique ◽  
Melaleuca Cajuputi ◽  
Chemometric Approach ◽  
Hierarchical Agglomerative Cluster Analysis

Cajuputi essential oil is extracted from the leaves of Melaleuca cajuputi Powell. This study is performed to spatially classify the variation of Melaleuca cajuputi essential oil fingerprint based on different sampling location using chemometric technique along Terengganu coastal area. Discriminant Analysis (DA) successfully discriminate 10 fingerprint of essential oil into three different groups with three significant peaks in FTIR analysis. Hierarchical agglomerative cluster analysis (HACA) successfully grouped the 10 sampling stations into three groups (cluster A, B and C).Classification criteria is based on the intensity movement of functional group either bending or stretching of the essential oil compound Multiple linear regression (MLR) was used to develop an equation model that explains the prediction of species fingerprint in each cluster by different locations. 

scholarly journals Essential Oil Variation from Twenty Two Genotypes of Citrus in Brazil—Chemometric Approach and Repellency Against Diaphorina citri Kuwayama

Molecules ◽  
2016 ◽  
Vol 21 (6) ◽  
pp. 814 ◽  
Author(s):  
Moacir Andrade ◽  
Leandro Ribeiro ◽  
Paulo Borgoni ◽  
Maria Silva ◽  
Moacir Forim ◽  
...  
Keyword(s):  
Essential Oil ◽  
Diaphorina Citri ◽  
Chemometric Approach

scholarly journals Control limit detection for source apportionment in Perlis River Basin, Malaysia

2017 ◽  
Vol 13 (3) ◽  
Author(s):  
Mohd Saiful Samsudin ◽  
Saiful Iskandar Khalit ◽  
Azman Azid ◽  
Hafizan Juahir ◽  
Ahmad Shakir Mohd Saudi ◽  
...  
Keyword(s):  
River Basin ◽  
Control Process ◽  
Principal Component ◽  
River Pollution ◽  
Quality Data ◽  
Water Quality Data ◽  
Data Set ◽  
Hierarchical Agglomerative Cluster ◽  
Limit Detection ◽  
Hierarchical Agglomerative Cluster Analysis

This study presents the application of selected environmetric in the Perlis River Basin. The results show PCA extracted nine principal components (PCs) with eigenvalues greater than one, which equates to about 77.15% of the total variance in the water-quality data set. The absolute principal component scores (APCS)-MLR model discovered BOD and COD as the main parameters, which indicates the measure of the agricultural pollution in the Perlis River Basin, the hierarchical agglomerative cluster analysis (HACA) shows 11 monitoring stations assembled into two clusters in accordance with similarities in the concentration of BOD and COD, which are grouped in P4. The X ̅ control chart shows that the mean concentration of BOD and COD in P4 is in the control process. The capability ratio (Cp) was applied to measure the risk of the concentration in terms of the river pollution in a subsequent period of time using the limit NWQS.

scholarly journals Characterization of Varietal Differences in Essential Oil Components of Hops (Humulus lupulus) by SFC–FTIR Spectroscopy

2000 ◽  
Vol 83 (3) ◽  
pp. 621-626 ◽  
Author(s):  
Rita H Auerbach ◽  
Kenan Dost ◽  
George Davidson
Keyword(s):  
Essential Oil ◽  
Chromatographic Method ◽  
Flow Cell ◽  
Humulus Lupulus ◽  
Ftir Analysis ◽  
Varietal Differences ◽  
Wave Numbers ◽  
Oil Components

Abstract A supercritical fluid chromatographic method combined with Fourier-transform infrared spectroscopy detection (SFC–FTIR) was developed for determination of varietal differences in essential oil constituents in hops (Humulus lupulus). Infrared spectra (IR) of the major constituents of essential oil of hops were taken as films deposited on AgCl discs and compared with those obtained after chromatographic separation in the IR flow-cell with supercritical carbon dioxide (scCO2). Spectra from AgCl discs were comparable to those in scCO2, but in scCO2 most of the bands appeared approximately 8–10 cm−1 to higher wave numbers. Open-tubular SFC–FTIR analysis of the essential oil of 4 different hop varieties was performed. The SFC–FTIR chromatograms showed differences in the location and relative intensity of the peaks depending on the variety, which was further confirmed by consideration of their FTIR spectra.

On the polysemy of the Polish complete path construction: A corpus-based exploratory study

2019 ◽  
Vol 55 (4) ◽  
pp. 631-670
Author(s):  
Daria Bębeniec ◽  
Małgorzata Cudna
Keyword(s):  
Cluster Analysis ◽  
Random Sample ◽  
Exploratory Study ◽  
Semantic Features ◽  
Hierarchical Agglomerative Cluster ◽  
Usage Patterns ◽  
Complete Path ◽  
Hierarchical Agglomerative Cluster Analysis ◽  
National Corpus

Abstract In this article, we present a corpus-based analysis of two major types of the Polish Complete Path (CP) construction in which a source-PP, headed by od+GEN, is immediately followed by a goal-PP, headed by do+GEN or po+ACC, as in od jesieni 1920 do jesieni 1921 ‘from autumn 1920 to autumn 1921’ and od kreskówek po rysunki techniczne ‘from cartoons to technical drawings’. The aim of the study is to shed some light on the polysemous structure of the CP construction on the basis of its usage patterns. To this end, we used a random sample of over 500 instances of both construction types retrieved from the National Corpus of Polish. The data were annotated for a number formal and semantic features and subsequently explored using hierarchical agglomerative cluster analysis. When interpreting the results of several analyses performed on different sets of variables, we gave special attention to three levels of semantic granularity encoded in the data, concluding that, on the whole, all analyses point towards a distinction between the spatial, temporal and abstract meanings of the construction under investigation.

scholarly journals Determination of Chemical Composition and Antimicrobial Activity of Melaleuca cajuputi Essential Oil from Quang Tri Province, Vietnam

2020 ◽  
Vol 32 (9) ◽  
pp. 2203-2207
Author(s):  
TRAN QUOC TOAN ◽  
LAI PHUONG PHUONG THAO ◽  
NGUYEN QUYET CHIEN ◽  
NGUYEN THI HONG VAN ◽  
ÐOAN LAN PHUONG ◽  
...  
Keyword(s):  
Essential Oil ◽  
Maximum Yield ◽  
Batch Process ◽  
Gram Negative Bacteria ◽  
Gram Negative ◽  
Qualitative And Quantitative ◽  
Melaleuca Cajuputi ◽  
Main Components ◽  
Bactericidal Agent

The essential oil of Melaleuca cajuputi was obtained by hydrodistillation method. This work aims to adopt water as a solvent in a batch process to extract essential oil from Melaleuca cajuputi fresh leaves. The leaves are collected from Quang Tri Province, Vietnam. Analysis of constituents was performed by GC/MS. The maximum yield ranged from 0.6 to 0.7%. Several compounds have been identified in high quantities and meaningful qualitative and quantitative differences have been observed under different conditions. The main components of the M. cajuputi essential oil included eucalyptol (27.512%), γ-terpinene (8.59%), terpinolene (9.047%), β-eudesmene (3.359%), α- selinene (3.889%), α-terpineol (4.108%), 1R-α-pinene (2.158%), caryophyllene (6.48%) and α-caryophyllene (3.522%). This study has confirmed that the essential oil of M. cajuputi essential oil is a promising bactericidal agent on several Gram-positive and Gram-negative bacteria.

scholarly journals Phytochemical Analysis, Antibacterial Activity, FTIR and GCMS Analysis of Ceropegia juncea Roxb.

2018 ◽  
Vol 9 (07) ◽  
Author(s):  
Visveshwari M. ◽  
Subbaiyan B. ◽  
Thangapandian V.
Keyword(s):  
Antibacterial Activity ◽  
Functional Group ◽  
Methanol Extract ◽  
Biological Activities ◽  
Phytochemical Analysis ◽  
Ftir Analysis ◽  
Major Peak ◽  
Zone Of Inhibition ◽  
Natural Health ◽  
Aerial Parts

The present study was focused on the preliminary phytochemical, antibacterial activity, FTIR and GC-MS analysis of aerial parts of C. juncea. Phytochemical analysis of three extracts showed that the presence of alkaloids, tannins and flavonoids. The methanol extract of aerial parts were found to be exhibit highest zone of inhibition against S. aureus (19.3mm), P. florescence (17.6mm) and K. pneumonia (17.0mm). FTIR analysis of the methanol extract given the major peak observed was at wavenumber 3354.08cm-1 that indicates the presence of O-H Alcohol functional group. 29 components were identified through the GCMS analysis of methanol extract. From results to confirm the fact that C. juncea possesses potential of bioactive compounds which are responsible for the biological activities that is useful for natural health.

scholarly journals Chemical Composition of Melaleuca Cajuputi Powell

2019 ◽  
Vol 9 (1) ◽  
pp. 3479-3483 ◽  
Keyword(s):  
Chemical Composition ◽  
Essential Oil ◽  
Chemical Compound ◽  
Steam Distillation ◽  
Chemical Compounds ◽  
Chemical Components ◽  
Melaleuca Cajuputi ◽  
Anti Inflammatory

Essential oil extracted from Melaleucagenus has been widely used worldwidefor many purposes. Most of the its has been reported as the source of phytochemical compound where mostly have anti-inflammatory, antiulcer, antioxidant, antimicrobial and insecticide properties. Thus, three objectives that have been highlighted in this study are (1) to extract essential oil (cajuput oil) from fresh leaves of MelaleucacajuputiPowell using simple steam distillation,(2) to determine the chemical components of MelaleucacajuputPowell essential oil using GCMS and (3) to compare the chemical compound and its percentage with the previous study.Results found that there were 41 chemical compounds that have been identified. The chemical compounds were monoterpenes such as α-terpinolene, α-pinene, sabinene, 4-terpineol and γ-terpinene. The highest chemical compounds found were caryophyllene (20.16%), α-terpinolene (17.0%),α-humulene (11.91%), βelemene (7.62%) and γ-terpinene (5.62%). In previous research, 1,8-cineole chemical compound was foundhowever, in this study a different chemical compound found, it was caryophyllene, this is due to different geographic area.As a conclusion, most of the compounds found was aromatic, antibacterial andinsecticide properties.

A spectrophotometric method for plant pigments determination and herbs classification

2014 ◽  
Vol 68 (5) ◽  
Author(s):  
Gabriela Dudek ◽  
Anna Strzelewicz ◽  
Monika Krasowska ◽  
Aleksandra Rybak ◽  
Roman Turczyn
Keyword(s):  
Spectrophotometric Method ◽  
Human Life ◽  
Plantago Lanceolata ◽  
Mentha Piperita ◽  
Melissa Officinalis ◽  
Hierarchical Agglomerative Cluster ◽  
Pigment Extraction ◽  
Hierarchical Agglomerative Cluster Analysis

AbstractTwenty herbs, showing medicinal benefits on human life, like Taraxacum officinale, Plantago lanceolata, Hypericum perforatum, Ocimum basilicum, Melissa officinalis, Mentha piperita, and others, were tested. The percentage content of pigments, i.e. chlorophylls, carotenoids, and flavonoids, in the chosen herbs was determined. The spectrophotometric method, which is quick and readily available, was used. Measurements required pigment extraction with a solvent. Ethanol was used for the determination of chlorophylls and carotenoids, and acetone for the determination of flavonoids. Hierarchical agglomerative cluster analysis was performed in order to confirm the experimental results. The study of flavonoids content showed an interesting regularity which can be used for the classification of herbs. Plants belonging to the Lamiaceae family showed the flavonoids content in the range from 0.18 % to 0.68 %, whereas those belonging to the Apiaceaehas family showed the flavonoids content in the 0.75–1.20 % range.

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