1,723,493 research outputs found
Phytochemical composition and antiradical activity of Sakersia africana Hook. f. medicinal plant from Gabon
No full textThe valorization of the medicinal plants of our country and determination of their impact on health due to their abundance of substances with various pharmacological effects are our principal objective. This study was evaluated the phytochemical screening and radical 2, 2-Diphenyl-1-picrylhydrazyl (DPPH) scavenging activity of different extracts of Sakersia africana Hook. f.. The results revealed that Sakersia africana Hook. f. is rich in phenols compounds, sterols, triterpenes, alkaloids and reducing compound. The values in total phenols and proanthocyanidines are ranging respectively from 391.58 ± 0.04 to 777 ± 0.03 mg/100 g of drugs and 113.5 ± 3.17 to 653.5 ± 36.83 mg/100 g of drugs. Results also show that different extracts tested present antiradical activity with values of IC50 ranging from 164.21± 0.014 to 195.54± 0.012 % and abundance in bioactive compounds. This study could justify the use of Sakersia africana of some chronic diseases. Published by the International Journal of Biomolecules and Biomedicine (IJBB
Microgynoecium Hook. f.
No full text18. Microgynoecium Hook. f. Microgyneocium Hook. f. in Benth. & Hook. f., Lien. Pl. 5: Db (1880). Annual, monoecious herb. Flowers in clusters hidden amongst the leaves; perianth lobes 5, hyaline; stamens l-4; pistillate flowers 2-bracteolate; stigmas 2. Fruit turgid; seeds vertical; embryo horseshoe-shaped. One sp., M. tibeticum Hook. f., Tibet, Sikkim.Published as part of Kuehn, U., 1993, Chenopodiaceae, pp. 253-281 in The Families and Genera of Vascular Plants 2, Berlin, Heidelberg :Springer-Verlag on page 26
Antioxidant and Anti-infective Potential of Ethanolic Extract of Eriobotrya bengalensis (Roxb.) Hook. f.: Phytochemicals Investigation and Molecular Docking Studies
No full textIn India, north-east region holds a special position of having diverse range of plants belonging to endemic species with widespread ethnomedicinal properties which remain unexplored till date. In the present study, Eriobotrya bengalensis (Roxb.) Hook. f. extract was evaluated for its radical scavenging activity and ability to combat quorum sensing regulated bacterial virulence in Pseudomonas aeruginosa PAO1. The ethanolic leaf extract of E. bengalensis (Roxb.) Hook. f. exhibited a concentration dependent radical scavenging of highly reactive DPPH and hydroxyl radicals with a scavenging percentage of 76.84 ± 4.72 and 67.37 ± 4.35 % respectively at a concentration of 500 µg/ml. E. bengalensis (Roxb.) Hook. f. also showed significant reducing power and relatively high ascorbic acid equivalent. The plant extract was also evaluated for its ability to down-regulate the production of quorum sensing (QS) regulated pathogenic determinants in P. aeruginosa PAO1. The violacein production in Chromobacterium violaceum and pyocyanin production in P. aeruginosa PAO1 was greatly inhibited on treatment with sub-MIC of E. bengalensis (Roxb.) Hook. f. with an inhibition of 79.58 ± 4.13 and 76.31 ± 4.03 % respectively. The anti-biofilm activity was further confirmed by confocal laser scanning microscopic (CLSM) analysis. The anti QS activity of E. bengalensis (Roxb.) Hook. f. was further corroborated by molecular docking studies which provides an insight into the mechanism of QS inhibition. The present result will provide novel leads to the application of unexplored plant species towards the development of novel anti-infectives in the post-antibiotic era
Chenopodium antarcticum (Hook, f.) Hook. f. 1800
No full textChenopodium antarcticum (Hook, f.) Hook. f. 1800. - Perennial, prostrate to ascending, richly branched from the base, farinose. Basal leaves with petiole often longer than the blade; blade broadly ovate, up to 4 x 2 cm, deeply lobed, pinnate or bipinnate; bracts dentate to entire. Inflorescences spike-like, bracteate almost to the top, composed of sessile glomerules. Flowers dimorphic; terminal ones with 4-5 tepals, lateral ones with 2-4. Tepals narrow. Seed horizontal in terminal flowers, vertical in lateral ones, broadly ovoid in outline, 0.7-1 mm. S Sk Lackalänga 1949 (with wool). - Patagonia.Published as part of Jonsell, B., Karlsson, 2005, Chenopodiaceae - Fumariaceae (Chenopodium), pp. 4-31 in Flora Nordica 2 on page 2
Pollenkitt ropes of Notopora schomburgkii Hook. f. (Ericaceae, Vaccinieae)
Get PDFPollen morphology of Notopora schomburgkii Hook. f. was examined using light (LM), scanning (SEM) and transmission electron microscopy (TEM). Pollenkitt ropes were observed and reported for the first time on pollen grains of N. schomburgkii, Ericaceae. With TEM these ropes show lipidic (“pollenkitt-like”) electron density but also show some resistance to acetolysis
System Toxicology Research of Tripterygium wilfordii Hook. f. on Female Rat Using LC-MS Based Urinary Metabolomics
No full textSystem Toxicology Research of Tripterygium wilfordii Hook. f. on Female Rat Using LC-MS Based Urinary Metabolomic
Goniothalamus HOOK. F. & THOMSON
No full textKEY FOR GONIOTHALAMUS (BLUME) HOOK. F. & THOMSON SPECIES IN NEW CALEDONIA 1. Leaves with secondary veins obviously impressed, lamina consequently slightly bullate (not flat); petals redbrown; monocarps flattened elongate with lateral triangular projections as a result of constrictions between seeds; flowers borne mostly at the base of the trunk (plants cauliflorous)........................................................................................................................................................ G. dumontetii R.M.K.Saunders & Munzinger — Leaves with secondary veins plane, not or weakly impressed, lamina mostly flat; petals pale green to creamcolored; monocarps elongate, terete or ellipsoid; flowers borne on leafy branches and sometimes on the trunk (plants cauliflorous)..................................................................................................................................... 2 2. Leaves 6.3-12 cm long, petiole 4-8 mm long, 0.7-1.5 mm in diameter, monocarps elongate, terete, 4.5-6.6 cm long, 0.7-1.1 cm in diameter, apex beaked, slightly to strongly torulose, seeds 3-8.................................................................................................................................... G. hmoope Munzinger & D.M. Johnson, sp. nov. — Leaves 17.5-30 cm long, petiole 10-21 mm long, 2.1-3.8 mm in diameter, monocarps narrowly ellipsoid, ellipsoid, subglobose to obovoid, 2.9-5.45 cm long, 1.1-3.05 cm in diameter, obtuse, apex rounded to acute, smooth, not torulose, seeds usually (1-)2(-3)........................................ G. obtusatus (Baill.) R.M.K. SaundersPublished as part of Munzinger, Jérôme, Johnson, David M. & Saunders, Richard M. K., 2023, Novitates neocaledonicae XIV: A third species of Goniothalamus (Blume) Hook. f. & Thomson from New Caledonia and lectotypification of G. obtusatus (Baill.) R. M. K. Saunders, pp. 327-335 in Adansonia (3) (3) 45 (20) on page 332, DOI: 10.5252/adansonia2023v45a20, http://zenodo.org/record/833499
Licania spicata Hook. f.
No full text<i>Licania spicata</i> Hook. f. (n = 1) <p> <b>Gall:</b> on leaf, globoid, brown, glabrous. <b>Gall-inducer:</b> not determined. <b>Trails:</b> <i>Teresópolis:</i> Mozart Catão to Primavera (25.X.2021), 360 (26.X.2021), Mozart Catão (25.V.2022).</p> <p> Maia <i>et al.</i> (2008) reported leaf and stem galls on <i>Licania spicata</i> Hook. f. in SP. Galls on this plant genus are known from AM (Almada & Fernandes, 2011), GO (Santos <i>et al.,</i> 2010; Araújo <i>et al.,</i> 2014) and MG (Maia & Fernandes, 2004, Coelho <i>et al.,</i> 2013).</p>Published as part of <i>Maia, Valéria Cid & Mascarenhas, Bernardo, 2023, Insect galls of Parque Nacional da Serra dos Órgãos (Rio de Janeiro State, Southeastern Brazil), pp. 1-56 in Papéis Avulsos de Zoologia 63</i> on page 19, DOI: 10.11606/1807-0205/2023.63.040, <a href="http://zenodo.org/record/10270483">http://zenodo.org/record/10270483</a>
Chenopodium macrospermum Hook. f. 1847
No full textChenopodium macrospermum Hook. f. 1847. - Tall, erect to ascending. Leaves resembling those of C. urbicum (10) but blade densely farinose, bluish below. Inflorescences spike-like, leafy, branches short. S Sk Lackalänga 1929, 1931 (wool refuse). - S South America; naturalized in Mexico and California. The Nordic material belongs to subsp. salsum (Phil.) A. Tronc. (subsp. halophilum (Phil.) Aellen).Published as part of Jonsell, B., Karlsson, 2005, Chenopodiaceae - Fumariaceae (Chenopodium), pp. 4-31 in Flora Nordica 2 on page 3
Impatiens glauca Hook. f. & Thomson
No full textKey to the varieties 1. Spur present......................................................................................................................................................... I. glauca var. glauca 2. Spur absent................................................................................................................................................... I. glauca var. ecalcarataPublished as part of Singh, Harsh, Sharma, Ashutosh & Adamowski, Wojciech, 2022, Impatiens glauca Hook. f. et Thomson-A little known Himalayan species with augmented description and a new spurless variety, pp. 280-286 in Phytotaxa 539 (3) on page 281, DOI: 10.11646/phytotaxa.539.3.7, http://zenodo.org/record/636420
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