Chemical composition ofHibiscus tiliaceus L. flowers: A study of extraction methods

The chemical composition of volatile compounds from pericarp oils of Indian sandalwood, Santalum album L., isolated by hydrodistillation and solvent extraction, were analyzed by GC and GC-MS. The pericarps yielded 2.6 and 5.0% volatile oil by hydrodistillation and n-hexane extraction, and they were colorless and yellow in color, respectively. A total of 66 volatile components were detected. The most prominent compounds were palmitic and oleic acids, representing about 40-70% of the total oil. Many fragrant constituents and biologically active components, such as α- and β-santalol, cedrol, esters, aldehydes, phytosterols, and squalene were present in the pericarp oils. This is the first report of the volatile composition of the pericarps of any Santalum species.

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Correction: Dissolved organic matter in Lake Superior: insights into the effects of extraction methods on chemical composition

Environmental Science Processes & Impacts ◽

10.1039/c9em90031d ◽

2019 ◽

Vol 21 (7) ◽

pp. 1215-1215

Author(s):

Hongyu Li ◽

Elizabeth C. Minor

Keyword(s):

Organic Matter ◽

Chemical Composition ◽

Dissolved Organic Matter ◽

Lake Superior ◽

Extraction Methods

Correction for ‘Dissolved organic matter in Lake Superior: insights into the effects of extraction methods on chemical composition’ by Hongyu Li et al., Environ. Sci.: Processes Impacts, 2015, 17, 1829–1840.

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Marine Biopolymers: Applications in Food Packaging

Processes ◽

10.3390/pr9122245 ◽

2021 ◽

Vol 9 (12) ◽

pp. 2245

Author(s):

Niaz Mahmud ◽

Joinul Islam ◽

Reza Tahergorabi

Keyword(s):

Chemical Composition ◽

Food Packaging ◽

Extraction Methods ◽

Edible Films ◽

Economic Benefits ◽

Packaging Materials ◽

Significant Component ◽

Packaging System ◽

Plastic Packaging ◽

Packaged Foods

Marine sources are gaining popularity and attention as novel materials for manufacturing biopolymers such as proteins and polysaccharides. Due to their biocompatibility, biodegradability, and non-toxicity features, these biopolymers have been claimed to be beneficial in the development of food packaging materials. Several studies have thoroughly researched the extraction, isolation, and latent use of marine biopolymers in the fabrication of environmentally acceptable packaging. Thus, a review was designed to provide an overview of (a) the chemical composition, unique properties, and extraction methods of marine biopolymers; (b) the application of marine biopolymers in film and coating development for improved shelf-life of packaged foods; (c) production flaws and proposed solutions for better isolation of marine biopolymers; (d) methods of preparation of edible films and coatings from marine biopolymers; and (e) safety aspects. According to our review, these biopolymers would make a significant component of a biodegradable food packaging system, reducing the amount of plastic packaging used and resulting in considerable environmental and economic benefits.

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The Influence of the Extraction Conditions of Blackthorn (Prunus spinosa) Fruits and Leaves on the Yield of Phenolic Compounds

Works of Georgian Technical University ◽

10.36073/1512-0996-2021-2-49-56 ◽

2021 ◽

pp. 49-56

Author(s):

Nino Gamkrelidze ◽

◽

Giorgi Kvartskava ◽

Keyword(s):

Chemical Composition ◽

Phenolic Compounds ◽

Plant Extracts ◽

Food Production ◽

Total Content ◽

Dry Weight ◽

Extraction Methods ◽

Prunus Spinosa ◽

Quality Of Food

Plant extracts used in food production significantly improve the quality of food. Chemical composition is the main prerequisites for the final use of plant extracts. The chemical composition of the extracts is affected by the extraction method and conditions - temperature, duration and solvent. On the basis of experimental data optimal conditions for the extraction of phenolic compounds from the fruits and leaves of blackthorn (Prunus spinosa) were selected. Among the extraction methods used in the experiment, the highest content of phenolic compounds in obtained extracts was observed during the ultrasonic extraction. A mixture of 0.25 parts of water and 0.75 parts of 96% ethanol showed best results from different volume ratios of water and ethanol. The optimal extraction time was 90 minutes. And the optimum temperature is 45°C. The total content of phenolic compounds in the extracts obtained by the abovementioned method amounted is 35.62±0.17 mgg -1(dry weight) for blackthorn fruits and 44,76 ± 0.08mgg -1(dry weight) for the leaves.

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Comparative Analysis of the Chemical Composition and Physicochemical Properties of the Mucilage Extracted from Fresh and Dehydrated Opuntia ficus indica Cladodes

Foods ◽

10.3390/foods10092137 ◽

2021 ◽

Vol 10 (9) ◽

pp. 2137

Author(s):

Michelle Quintero-García ◽

Elsa Gutiérrez-Cortez ◽

Moustapha Bah ◽

Alejandra Rojas-Molina ◽

María de los Angeles Cornejo-Villegas ◽

...

Keyword(s):

Chemical Composition ◽

Physicochemical Properties ◽

Separation Efficiency ◽

Calcium Content ◽

Extraction Methods ◽

Proximate Analysis ◽

Nitrogen Free Extract ◽

Mechanical Separation ◽

Texture Attributes ◽

Sustainable Extraction

The development of sustainable extraction methods to obtain natural products constitutes a challenge for the food industry. The aim of this work was to compare yield, separation efficiency, chemical composition, and physicochemical properties of the mucilage extracted from fresh cladodes (FNM) and mucilage extracted from dehydrated cladodes (DNM) of O. ficus indica. Suspensions of fresh and dehydrated cladodes (4% w/w) were prepared for mucilage extraction by using a mechanical separation process. Subsequently, the separated mucilage was precipitated with ethyl alcohol (1:2 v/v) then, yield and separation efficiency were determined. The mucilage was characterized by measuring Z potential, viscosity, color, and texture attributes. Additionally, chemical proximate analysis, scanning electron microscopy, and thermogravimetric analysis (TGA) were conducted. No significant differences (p < 0.05) were detected in the yield and separation efficiencies between samples. Nevertheless, the dehydration process of cladodes prior to mucilage extraction increased protein, ashes, nitrogen free extract, and calcium content. The viscosity was higher in DNM than in FNM. The TGA revealed a different thermal behavior between samples. In addition, the DNM showed lower L (darkness/lightness), cohesiveness, adhesiveness, and springiness values than those of FNM. These results support that differences found between the chemical and physicochemical properties of DNM and those of FNM will determine the applications of the mucilage obtained from the O. ficus indica cladodes in the food, pharmaceutical, and cosmetic industries.

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