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232 results for “Phytochemicals”

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zenodo36/100

Predicting medicinal phytochemicals of Moringa oleifera using hyperspectral reflectance of tree canopies

Research article:  <a href="https://doi.org/10.1080/01431161.2021.1887541">https://doi.org/10.1080/01431161.2021.1887541</a>New technique for processing hyperspectral data: 1)https://www.researchgate.net/publication/349663204_Computer_vision_and_hyperspectral_imagery_in_orchards_and_in_fields_Data_processing_and_analysis_methods2)https://www.researchgate.net/profile/Vjacheslav-Fisenko/publication/349663204/figure/fig13/AS:1139984849485825@1648804976658/3-D-visualization-of-reflectance-spectra-of-four-medicinal-plant-genotypesPredicting_W640.jpg

opencc-by-4.0Nov 2021View details →

dryad36/100

Data from: Timing of conceptions in Phayre's leaf monkeys: energy and phytochemical intake

Raising offspring imposes energetic costs, especially for female mammals. Consequently, seasons favoring high energy intake and sustained positive energy balance often result in a conception peak. Factors that may weaken this coordinated effect include premature offspring loss and adolescent subfertility. Furthermore, seasonal ingestion of phytochemicals may facilitate conception peaks. We examined these factors and potential benefits of a conception peak (infant survival, interbirth interval) in Phayre's leaf monkeys (Trachypithecus phayrei crepusculus). Data were collected at Phu Khieo Wildlife Sanctuary, Thailand (78 conceptions). We estimated periods of high energy intake based on fruit and young leaf feeding and via monthly energy intake rates. Phytochemical intake was based on fecal progestin. We examined seasonality (circular statistics, cox proportional hazard models) and compared consequences of timing (infant survival and interbirth intervals, t-test, Fisher exact test). Conceptions occurred in all months but peaked from May to August. This peak coincided with high fecal progestin rather than presumed positive energy balance. Primipara conceived significantly later than multipara. Neither infant survival nor interbirth intervals were related to the timing of conception. Periods of high energy intake may not exist and would not explain the conception peak in this population. However, the presumed high intake of phytochemicals was tightly linked to the conception peak. Timing conceptions to the peak season did not provide benefits, suggesting that the clustering of conceptions may be a mere by-product of phytochemical intake. To confirm this conclusion, seasonal changes in phytochemical intake and hormone levels need to be studied more directly.

opencc-zeroNov 2023View details →

zenodo36/100

Changes in Phytochemical Composition and Antioxidant Activity in Nine sh2 Sweet Corn Genotypes during Maturation

Table S1. Mean values ± SD of four biological replicates for the five evaluated traits across nine sh2 sweetcorn hybrids and the five maturity stages. Different lowercase letters as well as different uppercase letters indicate a significant difference at P < 0.05.

opencc-by-4.0Jul 2019View details →

zenodo36/100

Comparison of the phytochemical composition and bioactivity of the latex of Hura crepitans L. from Peru and Africa by metabolomic approaches

Hura crepitans  (Euphorbiaceae), is widespread in the Amazon rainforest and on plantations in sub-Saharan Africa. This tree produces an irritating milky latex rich in secondary metabolites, notably daphnane-type diterpenes and cerebrosides. Previous studies have shown that huratoxin, the main daphnane in the latex, significantly and selectively inhibited the growth of colorectal cancer cells through a unique mechanism involving the activation of PKCζ. One major challenge in isolating active molecules from natural products is the accessibility of the resource. This study explores the phytochemical composition and cytotoxic activities of latexes collected in Peru, Benin, and Togo using UHPLC-MS and metabolomics tools to identify a renewable source of bioactive compounds. Significant inter- and intra-continental differences in chemical composition have been highlighted, with daphnanes being concentrated in the Peruvian samples. Extracts form latexes collected in Peru showed cytostatic activity on Caco-2 cells, correlated with the presence of daphnanes, while some African samples exhibited cytotoxic activity on Jurkat and Hela cancer cell lines, leading to the identification of potential other new bioactive compounds such as sterol and cerebrosides.

opencc-by-4.0Sep 2024View details →

zenodo36/100

Table 3 in Phytochemical characterization, and antioxidant and antibacterial activities of the hydroethanolic extract of Anadenanthera peregrina stem bark

Table 3. Diameter of the inhibitory zone of the hydroethanolic extract of Anadenanthera peregrina stem bark against Staphylococcus aureus (ATCC 25923) and Escherichia coli (ATCC 25922).<table><tbody><tr><th></th><th>A. peregrina extract concentration</th><th></th><th></th></tr></tbody><tbody><tr><th>Strain</th><td></td><td></td><td></td><td>C +</td><td>C -</td></tr><tr><th></th><td>50 µL</td><td>100 µL</td><td>200 µL</td><td></td><td></td></tr><tr><th>E. coli</th><td>-</td><td>-</td><td>-</td><td>29 mm</td><td>-</td></tr><tr><th>S. aureus</th><td>10 mm</td><td>16 mm</td><td>20 mm</td><td>35 mm</td><td>-</td></tr></tbody></table>

opencc-by-4.0Dec 2022View details →

zenodo36/100

Table 2 in Phytochemical characterization, and antioxidant and antibacterial activities of the hydroethanolic extract of Anadenanthera peregrina stem bark

Table 2. Physicochemical properties,antioxidant activity,and total phenolic content of the hydroethanolic extract of A.peregrina stem bark.<table><tbody><tr><th>Sample</th><th>pH</th><th>Density (g cm 3)</th><th>DPPH (IC 50)</th><th>Total Phenolics (g GAE 100 g- 1)</th></tr></tbody><tbody><tr><th>A. peregrina extract</th><td>5.21 ± 0.01</td><td>0.956</td><td>44.13 mg mL-1</td><td>6.40 ± 0.08</td></tr></tbody></table>

opencc-by-4.0Dec 2022View details →

zenodo36/100

Table 1 in Phytochemical characterization, and antioxidant and antibacterial activities of the hydroethanolic extract of Anadenanthera peregrina stem bark

Table 1. Phytochemical prospecting of the main secondary metabolite groups of the hydroethanolic extract of A. peregrina stem bark.<table><tbody><tr><th>Secondary metabolite</th><th>Hydroethanolic extract of A. peregrina</th></tr><tr><th>Cardiac glycosides</th></tr></tbody><tbody><tr><th>Kedd reagent test</th><td>++</td></tr><tr><th>Keller–Kiliani reagent test</th><td>++</td></tr><tr><th>Baljet reagent test</th><td>-</td></tr><tr><th>Raymond–Marthoud reagent test</th><td>+++</td></tr><tr><th>Alkaloids</th></tr><tr><th>Libermann–Bouchardat reagent test</th><td>-</td></tr><tr><th>Wagner reagent test</th><td>-</td></tr><tr><th>Mayer’s reagent test</th><td>-</td></tr><tr><th>Organic acids</th></tr><tr><th>Pascová reagent test</th><td>++</td></tr><tr><th>Reducing sugars</th></tr><tr><th>Fehling reagent test</th><td>++</td></tr><tr><th>Non-reducing sugars</th></tr><tr><th>Fehling + HCl test</th><td>-</td></tr><tr><th>Coumarins</th></tr><tr><th>UV light 254 and 365 nm</th><td>+</td></tr><tr><th>Saponins</th></tr><tr><th>Foamy</th><td>-</td></tr><tr><th>Haemolytic</th><td>+++</td></tr><tr><th>Polysaccharides</th></tr><tr><th>Reactive lugol</th><td>-</td></tr><tr><th>Phenols</th></tr><tr><th>FeCl 3 Tannins</th><td>+++</td></tr><tr><th>FeCl3 Flavonoids</th><td>Gr</td></tr><tr><th>Pb(C2 H 3O2)2</th><td>++</td></tr><tr><th>Purines</th><td>-</td></tr><tr><th>Catechins</th><td>+++</td></tr><tr><th>Benzoquinone derivatives</th><td>+++</td></tr><tr><th>Depsids and depsidones</th><td>+++</td></tr><tr><th>Steroids and triterpenoids</th><td>-</td></tr><tr><th>Sesquiterpenolactones</th><td>-</td></tr></tbody></table>

opencc-by-4.0Dec 2022View details →

dryad36/100

Phytochemical diversity impacts herbivory in a tropical rainforest tree community

Metabolomics provides an unprecedented window into diverse plant secondary metabolites that represent a potentially critical niche dimension in tropical forests underlying species co-existence. Here, we used untargeted metabolomics to evaluate chemical composition of 358 tree species and its relationship with phylogeny and variation in light environment, soil nutrients, and insect-herbivore leaf damage in a tropical rain forest plot. We report no phylogenetic signal in most compound classes, indicating rapid diversification in tree metabolomes. We found that locally co-occurring species were more chemically dissimilar than random, and that local chemical dispersion and metabolite diversity was associated with lower herbivory, especially that of specialist insect herbivores. Our results highlight the role of secondary metabolites in mediating plant-herbivore interactions and their potential to facilitate niche differentiation in a manner that contributes to species coexistence. Furthermore, our findings suggest that specialist herbivore pressure is an important mechanism promoting phytochemical diversity in tropical forests.

opencc-zeroSep 2023View details →

ClinicalTrials.gov36/100

Formulation, Phytochemical Characterization, and Clinical Assessment of a Novel Natural Supplement Targeting Body Composition in Physically Active Individuals

ClinicalTrials.gov study NCT07038135. IPD Sharing: YES. Countries: 1. Publications: 2.

controlledIPD-YESFeb 2026View details →

ClinicalTrials.gov36/100

Clinical and Biological Effects of Citrus-phytochemicals in Subjective Cognitive Decline.

ClinicalTrials.gov study NCT04744922. IPD Sharing: YES. Countries: 1. Publications: 15.

controlledIPD-YESFeb 2026View details →

dryad36/100