CHARACTERIZATION OF ACTIVE COMPOUNDS FROM CITRUS PEELS BY-PRODUCTS USING CHROMATOGRAPHIC AND OPTIC METHODS

2017 ◽  
Vol 31 (2) ◽  
pp. 41-47
Author(s):  
Cristina Mihali ◽  
◽  
Thomas Dippong ◽  
Anca Dumuţa ◽  
◽  
...  
Keyword(s):  
Visible Region ◽  
Citrus Fruit ◽  
Volatile Oils ◽  
Complex Composition ◽  
Citrus Peels ◽  
Layer Chromatography ◽  
Derivatives Of ◽  
By Products ◽  
Extracting Agents

Citrus fruits such as orange, grapefruit, lemon and other citrus fruit are widely cultivated and processed generating large amounts of by-products. Citrus peels contain various compounds of economic importance such as volatile oils, flavonoids, polyphenols, carotenoids etc. It is essential to valorize the wastes of citrus processing. In this purpose, peels of orange, grapefruit and lemon, fresh and dried were subjected to extraction using trichloromethane and dichloromethane as extracting agents and analyzed by thin layer chromatography on silica gel plates. Visualization at 366 nm and 254 nm showed a complex composition of extracts that contain terpenes, oxygen heterocyclic substances derivatives of coumarin and carotenoids. The UV-VIS spectra of the extracts were recorded showing absorption in UV and Visible region.

scholarly journals CHARACTERIZATION OF ANTIFUNGAL ACTIVITY OF THE VARIOUS ACTIVE CONSTITUENTS OF COLEUS

2015 ◽  
Vol 2 (1) ◽  
pp. 125-127
Author(s):  
Ranjith Santhosh Kumar D.S ◽  
Lakshman Kumar B
Keyword(s):  
Methanolic Extract ◽  
Pharmaceutical Preparations ◽  
The Other ◽  
Coleus Forskohlii ◽  
Volatile Oils ◽  
Antifungal Effect ◽  
Active Constituents ◽  
Anti Fungal ◽  
Layer Chromatography

The aim of this study was to evaluate the anti-fungal effect of different solvent extracts of Coleus forskohlii which contains minor diterpenoids, deacetylforskohlin, 9-deoxyforskohlin, 1,9-deoxyforskohlin, 1,9-dideoxy-7-deacetylforskohlin, and four other diterpenoids, along with alkaloids and volatile oils. The solvent extracts included both polarized and non-polarized solvents like methanol, ethylacetate, benzene, chloroform, water, hexane, acetone and ethanol. As a result of this study, the antifungal effect was best observed with the methanolic extract against Candida albicans in comparison to the other extracts. This study also revealed that apart from forskohlin, which was confirmed by Thin Layer Chromatography, other compounds that were extracted with methanol are required to produce the antifungal effect and can be taken forward to pharmaceutical preparations.

Pharmacognostic studies of Morinda brevipes S. Y. Hu

2019 ◽  
Vol 48 (3) ◽  
pp. 401-407
Author(s):  
Rong Li ◽  
Xiaojing Lin ◽  
Genqiu Tang ◽  
Junni Li ◽  
Dong Wang ◽  
...  
Keyword(s):  
Calcium Oxalate ◽  
Transverse Section ◽  
Volatile Oils ◽  
Needle Crystal ◽  
Cork Cell ◽  
Registration Number ◽  
Phytochemical Studies ◽  
First Time ◽  
Layer Chromatography ◽  
Inequality Type

DNA barcoding of ITS and psbA-trnH regions, histochemistry as well as thin layer chromatography (TLC) of Morinda brevipes S.Y. Hu were analyzed. Transverse section of root revealed the presence of cortex, xylem, cork cell, stone cells, and calcium oxalate sandy crystal. The lower epidermis cells showed many stoma in paracytic or inequality type. Spiral vessel and tiny calcium oxalate needle crystal usually appeared in the powder. TLC showed the presence of emodin in M. brevipes. Phytochemical studies revealed the existence of carbohydrates, saponins, tannins, flavones, anthraquinones, alkaloids and volatile oils. The ITS and psbAtrnH sequences were found for the first time which were submitted to NCBI to obtain the GenBank registration number. This study might play an important role in the identification, and utilization of M. brevipes for various purposes.

Synthesis and Spectral Characterization of Derivatives of Benzotriazole and Piperidine

2018 ◽  
Vol 8 (2) ◽  
pp. 278-287
Author(s):  
Selvarathy Grace P ◽  
Ravindran Durainayagam B ◽  
Pon Matheswari P.
Keyword(s):  
Spectral Characterization ◽  
Derivatives Of

scholarly journals Analytical Characterization of Water-Soluble Constituents in Olive-Derived By-Products

Foods ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 1299
Author(s):  
Pablo Doménech ◽  
Aleta Duque ◽  
Isabel Higueras ◽  
José Luis Fernández ◽  
Paloma Manzanares
Keyword(s):  
Olive Tree ◽  
Mediterranean Area ◽  
Water Soluble ◽  
Olive Pomace ◽  
Olive Leaves ◽  
Olive Stone ◽  
Olive Trees ◽  
Tree Pruning ◽  
By Products

Olive trees constitute one of the largest agroindustries in the Mediterranean area, and their cultivation generates a diverse pool of biomass by-products such as olive tree pruning (OTP), olive leaves (OL), olive stone (OS), and extracted olive pomace (EOP). These lignocellulosic materials have varying compositions and potential utilization strategies within a biorefinery context. The aim of this work was to carry out an integral analysis of the aqueous extractives fraction of these biomasses. Several analytical methods were applied in order to fully characterize this fraction to varying extents: a mass closure of >80% was reached for EOP, >76% for OTP, >65% for OS, and >52% for OL. Among the compounds detected, xylooligosaccharides, mannitol, 3,4-dihydroxyphenylglycol, and hydroxytyrosol were noted as potential enhancers of the valorization of said by-products. The extraction of these compounds is expected to be more favorable for OTP, OL, and EOP, given their high extractives content, and is compatible with other utilization strategies such as the bioconversion of the lignocellulosic fraction into biofuels and bioproducts.

scholarly journals Extraction and Mass Spectrometric Characterization of Terpenes Recovered from Olive Leaves Using a New Adsorbent-Assisted Supercritical CO2 Process

Foods ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 1301
Author(s):  
Zully J. Suárez Montenegro ◽  
Gerardo Álvarez-Rivera ◽  
Jose A. Mendiola ◽  
Elena Ibáñez ◽  
Alejandro Cifuentes
Keyword(s):  
Aluminum Oxide ◽  
Silica Gel ◽  
Supercritical Co2 ◽  
Olive Leaves ◽  
Fractionation Process ◽  
Selective Enrichment ◽  
Adsorption Desorption ◽  
First Time ◽  
By Products

This work reports the use of GC-QTOF-MS to obtain a deep characterization of terpenoid compounds recovered from olive leaves, which is one of the largest by-products generated by the olive oil industry. This work includes an innovative supercritical CO2 fractionation process based on the online coupling of supercritical fluid extraction (SFE) and dynamic adsorption/desorption for the selective enrichment of terpenoids in the different olive leaves extracts. The selectivity of different commercial adsorbents such as silica gel, zeolite, and aluminum oxide was evaluated toward the different terpene families present in olive leaves. Operating at 30 MPa and 60 °C, an adsorbent-assisted fractionation was carried out every 20 min for a total time of 120 min. For the first time, GC-QTOF-MS allowed the identification of 40 terpenoids in olive leaves. The GC-QTOF-MS results indicate that silica gel is a suitable adsorbent to partially retain polyunsaturated C10 and C15 terpenes. In addition, aluminum oxide increases C20 recoveries, whereas crystalline zeolites favor C30 terpenes recoveries. The different healthy properties that have been described for terpenoids makes the current SFE-GC-QTOF-MS process especially interesting and suitable for their revalorization.

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