scholarly journals Determinação de polifenóis totais e flavonoides em Eugenia uniflora l. (PITANGA): fruto in natura, polpa congelada e geleia / Determination of total polyphenols and flavonoids in Eugenia uniflora l. (surinam cherry): fresh fruit, frozen pulp and jelly

2021 ◽  
Vol 4 (6) ◽  
pp. 28471-28483
Author(s):  
Samantha Peixoto Silva ◽  
Thais Sampaio Marques ◽  
Vanusa Regina Lando ◽  
Valdeni Terezinha Zani
Keyword(s):  
Fresh Fruit ◽  
Total Polyphenols ◽  
Eugenia Uniflora

scholarly journals Comparative pharmakognostical study of roots of Rosa Majalis Herrm. and Rosa Canina L.

2021 ◽  
pp. 71-78
Author(s):  
Tetiana Oproshanska ◽  
Olga Khvorost ◽  
Kateryna Skrebtsova ◽  
Konradas Vitkevicius
Keyword(s):  
Cell Walls ◽  
Raw Materials ◽  
Total Polyphenols ◽  
Diagnostic Features ◽  
Rosa Canina ◽  
Plant Raw Materials ◽  
Quantitative Content ◽  
Microscopic Features ◽  
Boundary Limits

The aim is to conduct a comparative pharmacognostical study of the series of roots of Rosa (R.) majalis Herrm. and Rosa (R.) canina L. with the establishment of diagnostic features of morphological and anatomical structure and boundary limits of numerical indicators of raw materials. Materials and methods. The fresh and dry raw materials were used to study the macroscopic microscopic features by microscope Delta optical BioLight 300 (Poland). Determination of total polyphenols was performed by spectrophotometry (on a spectrophotometer Optizen POP (Korea)) and HPLC (chromatograph an Agilent 1200 3 D LC System Technologies (USA)). Results. The morphological (nature of the surface (periderm) and fracture) and anatomical (color of cell walls and their cavities; location of the sclerenchyma; the presence of a crystalline coating of the sclerenchyma at the root of R. canina; of various elements of the remains of the tetraarchic conducting bundle in the center of the root) diagnostical features of roots of R. majalis and R. Canina were established. Comparing the numerical values of loss on drying (not more than 10 %), total ash (not more than 5 %), extractable matter (not less than 9 %) and the quantitative content of total polyphenols (not less than 4 %) it was determined that both types of raw materials according to these indicators are almost indistinguishable. Conclusions. Loss on drying, total ash, extractable matter and content of total polyphenols of the root of R. majalis and R. canina do not have significant differences, that is why the root of both plant species can be used as medicinal plant raw materials such as “Rose root”. The obtained data will be used in further research when creating methods of quality control of plant raw materials and phytomedicines

Microscopic features and phytochemistry of two Congolese medicinal plants: Aframomum alboviolaceum (Ridley) K. Schum, and Aframomum angustifolium (Sonn.) K. Schum. (Zingiberaceae).

2021 ◽  
Vol 1 (2) ◽  
pp. 043-052
Author(s):  
Clément Liyongo Inkoto ◽  
Koto-Te-Nyiwa Ngbolua ◽  
Adrien Tuwisana Masunda ◽  
Carlos Nkongolo Kabengele ◽  
Jeff Bekomo Iteku ◽  
...  
Keyword(s):  
Democratic Republic ◽  
Democratic Republic Of Congo ◽  
Traditional Healers ◽  
Phytochemical Screening ◽  
Calcium Oxalate Crystals ◽  
Total Polyphenols ◽  
Microscopic Features ◽  
Chemical Groups ◽  
First Time

The leaves and seeds of Aframomum alboviolaceum and Aframomum angustifolium are specifically used by traditional healers in the Democratic Republic of Congo (DRC) for the treatment of several pathologies. The aim of present study was to determine the microscopic characteristics and phytochemical composition of these species of the genus Aframomum. The microscopic study of these plants revealed the presence of punctate vessels, fiber cluster with calcium oxalate crystals, isolated unicellular hair, fibers, starch grains, spiral vessel fragments, fiber fragments, and indistinct parenchyma fragments. Phytochemical screening revealed several chemical groups such as phenolic acids, flavonoids, coumarins, alkaloids, terpenes, iridoids, saponins etc. The determination of total polyphenols, flavonoids and tannins gave contents ranging from 14.95 ± 0.45 and 63.98 ± 2.04 mgGAE/g, 0.16 ± 0.01 and 10.68 ± 0.32 mgQE/g and between 1.28 ± 0.03 and 28.51 ± 0.56 mg CAE/g respectively. In general, the leaves are richer in secondary metabolites, polyphenols, flavonoids and tannin than the seeds. Both plants also contain iron, magnesium, calcium and sodium. To our knowledge, this is the first time that histological elements have been identified in the leaves and seeds of A. angustifolium.

Determination of Total Polyphenols and Nutritional Composition of Two Different Types of Ficus carica Leaves Cultivated in Saudi Arabia

2012 ◽  
Vol 11 (11) ◽  
pp. 1061-1065 ◽  
Author(s):  
Fatimah Ghazi ◽  
Asmah Rahmat ◽  
Zaitun Yassin ◽  
Nurul Shazini Ramli ◽  
Nurul Amira Buslima
Keyword(s):  
Saudi Arabia ◽  
Nutritional Composition ◽  
Ficus Carica ◽  
Total Polyphenols ◽  
Different Types

The Determination of Ddt as Spray Residue on Fresh Fruit Three Independent Methods

1946 ◽  
Vol 29 (2) ◽  
pp. 188-218
Author(s):  
H J Wichmann ◽  
W I Patterson ◽  
P A Clifford ◽  
A K Klein ◽  
H V Claborn
Keyword(s):  
Fresh Fruit

Liquid Chromatography, Microfluorometry, and Dye-Titration Determination of Vitamin C in Fresh Fruit and Vegetables

1983 ◽  
Vol 66 (6) ◽  
pp. 1377-1379
Author(s):  
Ron B H Wills ◽  
Pushparany Wimalasirl ◽  
Heather Greenfield
Keyword(s):  
Ascorbic Acid ◽  
Liquid Chromatography ◽  
Vitamin C ◽  
Dehydroascorbic Acid ◽  
Fresh Fruit ◽  
Fruit And Vegetables ◽  
End Point ◽  
Liquid Chromatographic ◽  
Good Agreement

Abstract The vitamin C content of several fresh fruit and vegetables was determined by a liquid chromatographic (LC) method which gave simultaneous separate values for ascorbic acid and dehydroascorbic acid (DHA) and by the official AOAC methods of microfluorometry and dye-titration. The levels of ascorbic acid obtained by LC and dye-titration were in good agreement, except for a few colored products where it was difficult to determine the end point of the titration. The combined values for ascorbic acid and DHA obtained by LC and microfluorometry were in agreement for most produce, but for about one-third of the samples, the values obtained by microfluorometry were significantly higher.

The rapid determination of total polyphenols content and antioxidant activity in Dendrobium officinale using near-infrared spectroscopy

2016 ◽  
Vol 8 (23) ◽  
pp. 4584-4589 ◽  
Author(s):  
Longhui Ma ◽  
Zhimin Zhang ◽  
Xingbing Zhao ◽  
Sufeng Zhang ◽  
Hongmei Lu
Keyword(s):  
Antioxidant Activity ◽  
Infrared Spectroscopy ◽  
Near Infrared ◽  
Rapid Determination ◽  
Nir Spectroscopy ◽  
Dendrobium Officinale ◽  
Chemometric Methods ◽  
Total Polyphenols ◽  
Rapid Quantification

NIR spectroscopy coupled with chemometric methods for rapid quantification of total polyphenols content and antioxidant activity inDendrobium officinale.

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