@article {1428, title = {A Review of the Traditional Uses, Medicinal Properties and Phytochemistry of Centaurea benedicta L.}, journal = {Pharmacognosy Journal}, volume = {13}, year = {2021}, month = {May 2021}, pages = {798-812}, type = {Review Article}, chapter = {798}, abstract = {

Centaurea benedicta L. is an annual herbaceous plant which belongs to the Asteraceae family. It is native to the Mediterranean region and western Asia and is commonly known as blessed thistle, holy thistle, St Benedict{\textquoteright}s thistle or spotted thistle. Traditionally, it has been used to treat bubonic plague and possesses diuretic, galactagogue, liver-strengthening and wound healing properties. Recent research studies have investigated its anticancer, antiinflammatory, antioxidant and other therapeutic properties. Several studies have also reported its antimicrobial activity against a range of bacterial pathogens. However, most of these studies were preliminary and only tested relatively high concentrations of the extracts. Additionally, most studies screened a limited number of pathogens. Cnicin is the main chemical compound present in C. benedicta and it has been widely investigated. However, few other compounds from this plant have been identified and/or investigated, and further phytochemical studies are warranted. Interestingly, pure cnicin has good anticancer activity, whilst the crude extracts lack cytotoxic properties. Phytochemical analyses of C. benedicta extracts reveal the presence of multiple flavonoids, tannins, terpenoids and lactones, although few specific phytochemicals within these phytochemical classes have been identified. A limited number of research studies have determined the toxicity profile of C. benedicta in order to evaluate its safety for human use. Substantially more detailed studies are required to rigorously investigate the therapeutic properties and phytochemistry of C. benedicta, which may ultimately lead to the development of new plant-based therapeutic medicines.

}, keywords = {Asteraceae, Blessed thistle, Flavonoids, St Benedict{\textquoteright}s thistle, Tannins, Terpenoids}, doi = {10.5530/pj.2021.13.102}, author = {Gagan Tiwana and Jiahe Fua and Lanping Lu and Matthew J Cheesman and IE.Cock} } @article {1107, title = {Condensed Tannins Content and their Influence on the Antioxidant Activity of Bark Hydroethanol Extract of Piliostigma reticulatum (Dc) Hochst and its Fractions}, journal = {Pharmacognosy Journal}, volume = {12}, year = {2020}, month = {March 2020}, pages = {361-368}, type = {Research Article}, chapter = {361}, abstract = {

Background: Consumption of natural products from plants is implicated in the reduction of the occurrence of diseases related to oxidative stress. Piliostigma reticulatum is a plant well known to traditional practitioners in Senegal where leaves and bark are often used against many diseases, such as ulcers, boils, syphilitic cancer, toothache, gingivitis and diarrhea. Aim: This study compared hydroethanol extract from the plant bark and its fractions by assessing their total phenol contents, antioxidant activity and the influence of condensed tannins on their activity. Method: barks were extracted by a moderate decoction with ethanol-water followed by a silica column fractionation with successively ethyl acetate, methanol and water. For this study, assays were carried out before and after precipitation of tannins by BSA and PVPP tests. Total phenol and condensed tannins of hydroethanolic extract and its fractions were performed by Folin Ciocalteu and hydrolysis methods. Antioxidant activity was evaluated by DPPH and CUPRAC tests. Results: Tannins precipitation leads a light decrease of total phenol and condensed tannins contents of samples. Total phenol content of hydroethanolic extract was 51.2 mg GAE/g vs 3.2 after BSA test and 1.7 after PVPP test whereas condensed tannins content obtained 72.2\% vs 4.2\% and 2.3\% after precipitation. Antiradical activity was lost following the elimination of tannins with IC50: 5.33 {\textpm} 0.04 mg/l vs 78.86 {\textpm} 0.92 after BSA and \> 500 after PVPP. Conclusion: This results showed the condensed tannins would be in charge of antiradical and reducing activities of plant barks and PVPP precipitated much better the tannins from those extracts than BSA.

}, keywords = {Antioxidant, Bark, Piliostigma reticulatum, Precipitation, Tannins}, doi = {10.5530/pj.2020.12.57}, author = {Serigne Ibra Mback{\'e} DIENG and C{\'e}line Mathieu and Abdou SARR and Kady Diatta-Badji and Alioune Dior FALL} } @article {1262, title = {Phytochemical and Antioxidant Evaluation of the Flavonoids and Tannins from Synadenium grantii Hook f, (Ephorbiaceae)}, journal = {Pharmacognosy Journal}, volume = {12}, year = {2020}, month = {September 2020}, pages = {1421-1428}, type = {Research Article}, chapter = {1421}, abstract = {

Background: The methanol extract (MeE) of the aerial parts from Synadenium grantii Hook f, (Ephorbiaceae) has more Polyphenols and used to treat several diseases. Objective: The aim of this study is isolation, purification and identification of Polyphenols that showed good antioxidant activity. Materials and Methods: In the present study, purification of the MeOH-H2O extract (70:30) from the air-dried aerial parts of S. grantii resulted by different chromatographic tools. The antioxidant activities were evaluated for the examined compounds by several methods using DPPH, Reducing power, ABTS and FRAP assays. Results: A total of 14 compounds were isolated from this plant species for the first time. The results obtained showed that all the examined compounds possess remarkable antioxidant activity through all assays especially compounds 2 and 4 where they showed the highest antioxidant activity among the other compounds and very close to the results of the standard compound BHA. Conclusion: The compounds examined have exhibited antioxidant activity with promising value as natural source antioxidant drugs.

}, keywords = {Antioxidant, Ephorbiaceae, Flavonoids, Synadenium grantii, Tannins}, doi = {10.5530/pj.2020.12.196}, author = {Asmaa S Abd Elkarim and Sahar Abdelaziz and Hany Gouda Attia and Hanan AA Taie and Rafik Monir} } @article {889, title = {Phytochemical Study of Odorous Celery Root (Apium graveolens L.) Grown in the North Caucasus}, journal = {Pharmacognosy Journal}, volume = {11}, year = {2019}, month = {May 2019}, pages = {527-530}, type = {Original Article}, chapter = {527}, abstract = {

Context: Flavoring celery (Apium graveolens L.) from the umbrella family (Apiaceae) is a common food plant, its use as a spice has been known since Ancient Greece. Stems, leaves and root are widely used in cooking in various dishes: soups, salads and side dishes. Celery fragrant has mild laxative, diuretic, antiseptic, anti-allergic, anti-inflammatory, enveloping and wound healing properties. Aims: The aim of our research was the phytochemical study of celery root odorous, quantitative definition of flavonoid, carotenoid, polysaccharides, tannin, free organic acids, essential oils and lipid. Methods and Material: The research material was dried and chopped celery fragrant root passing through a 3 mm sieve. We carried out quantitative determination of biologically active substances in the celery root odorous by the following methods: flavonoids (In terms of rutin) by the spectrophotometric method; carotenoids by the photocolorimetric method; essential oil, polysaccharides, lipophilic substances by the gravimetric method; free organic acids and tannins by the titrimetric method. Statistical analysis used: The results of the studies are given in the table. Statistical data processing was performed according to the method {\textquotedblleft}Statistical processing of the results of a chemical experiment and biological tests{\textquotedblright} presented in State Pharmacopoeia XI [1]. The sample size (n) is 6, the confidence level (P) is 95\%, the student criterion (t (P, f) is 2.57). Results: For the first time, we carried out a quantitative assessment of the content of seven groups of biologically active compounds of celery root odorous, grown in the North Caucasus: essential oil - 2.04 {\textpm} 0.01\%, flavonoids - 1.44 {\textpm} 0.01,\% lipophilic substances - 4, 05 {\textpm} 0.01\%, carotenoids - 3.03 {\textpm} 0.02\%, free organic acids - 2.38 {\textpm} 0.02\%, tannins - 8.06 {\textpm} 0.01\%, water-soluble polysaccharides - 8, 33 {\textpm} 0.01\%, pectin substances - 3.45 {\textpm} 0.01\%, hemicellulose A - 1.54 {\textpm} 0.01\%, hemicellulose B - 1.47 {\textpm} 0.01\%. Conclusion: Celery root odorous grown in the North Caucasus is a source of biologically active compounds.

}, keywords = {Carotenoids, Essential oil, Flavonoids, Free organic acids, Polysaccharides, Tannins}, doi = {10.5530/pj.2019.11.84}, author = {Tsakhkhaeva Zuhra Sarmanovna} }