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Search Results: 1 - 10 of 2444 matches for " Max Monan "
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Pharmacognostic, Physicochemical and Phytochemical Analysis of Two Cultivars from Hibiscus sabdariffa L. in Cuba  [PDF]
Francis Brown, José González, Max Monan
Open Access Library Journal (OALib Journal) , 2019, DOI: 10.4236/oalib.1105894
Abstract:
Roselle (Hibiscus sabdariffa L.) is an edible plant used in various applications including foods. Among them, the most popular are the fleshy red calyces used for making wine, juice, jam, syrup, pudding, cakes, ice cream or tea. Roselle flower and calyces are also known for its antiseptic, diuretic, antioxidant and antimutagenic properties. In order to offer aspects related to the quality and effectiveness of the plant, its pharmacognostic, physicochemical, and phyto-chemical parameters of the chalices were realized. Moisture content was (1.11% ± 0.07%), total acidity was (21.24% ± 0.31%), alcohol extractive value was at 95% (4.5 ± 0.03). The total phenolic content was 22.18 mg/g, while the total anthocyanidin content was 6.972 mg/g of dried matter. Phytochemical screening revealed the possible presence of saponins, phenolic compounds, glycosides, aminoacids, reductants sugars, anthraquinones, and alkaloids and the absence of terpenoids.
Isolation and Characterization of Flavonols by HPLC-UV-ESI-MS/MS from Talipariti elatum S.w  [PDF]
José González Yaque, Armando Cuéllar, Lionel Massi, Max Monan, Enmanuel Nossin, Frantz Fran?ois-Haugrin
American Journal of Plant Sciences (AJPS) , 2016, DOI: 10.4236/ajps.2016.78115
Abstract: The red petals of the flowers of Talipariti elatum, commonly named majagua is used as antitussive, expectorant and antasthmatic in phytotherapy, although the plants’ composition has not been determined in detail so far. Hence, in this study, we present a validated, sensitive, reliable, and cheap narrow-bore LC-UV-ESI-MS/MS coupled to PDA (photodiode array detectors) method for the simultaneous isolation and identification of flavonoids and their glycosidic derivatives in this flower drug. In addition, the structures of two compounds have been elucidated by LC-MS experiments after isolation. Structure analyses allow proposing the presence of gossypitrin (gossypetin-7-O-glucoside) or gossypetin-3'-O-glucoside, a quercetin derivative, possibly quercetin-3-O-glucoside and an unidentified compound with an impair number of m/z, probably an alkaloid.
New Reported Flavonol Characterized by NMR from the Petals of Talipariti elatum S. w. in Cuba  [PDF]
José González Yaque, Armando Cuéllar, Marc Gaysinski, Max Monan, Enmanuel Nossin, Frantz Fran?ois-Haugrin
American Journal of Plant Sciences (AJPS) , 2016, DOI: 10.4236/ajps.2016.711148
Abstract: From yellow petals of Blue Mahoe, besides the known flavonoids gossypetin and gossypitrin, a new one gossypetin derivative was isolated from ethanolic extracts after Soxhlet extraction. Hence, in this study, we present a validated, sensitive and reliable NMR method for the simultaneous identification of flavonoids in this flower drug. Structure analyses of this flavonoid, revealed the identical glycoside moiety attached to a flavonol skeleton like gossypitrin, for which the structure of gossypetin-3'-O-β-glucoside was deduced from extensive NMR experiments.
Pharmacognostic and Phytochemical Studies of Smilax domingensis Willd. in Cuba  [PDF]
José González Yaque, Max Monan, Armando Cuéllar, Teylor de Armas, Enrique Gómez, Eniel Dopico
American Journal of Plant Sciences (AJPS) , 2017, DOI: 10.4236/ajps.2017.86100
Abstract: A preliminary pharmacognostical and phytochemical evaluation of Smilax domingensis Willd., (Smilacaceae) was realized to determine the macromorphology and micromorphology characteristics, the physicochemical and phytochemical parameters from the rhizome of this spice that grows in Cuba. This crude drug showed the characteristic physicochemical values such as moisture content (13.11%), extractable matter in ethanol at 70% (13.53%), total ashes (3.45%), water soluble ashes (2.43%) and acid insoluble ashes (0.64%). Phytochemical screening revealed the possible presence of alkaloids, oils and/or fats, coumarins, saponins, flavonoids, pyrogallol-type tannins, quinones, catechins, reductants sugars, triterpens and steroids and absence of resins, aminoacids, cardiotonic glycosides, anthocyanidins and astringent and/or bitter principles, realized under WHO parameters.
UHPLC-DAD-ESI-MS/MS Analysis of Flavonoids from Ethanolic Extracts of Theobroma cacao Husk in Cuba  [PDF]
José González, Danae Pérez, Enrique Gómez, Damaris de la C. Salgado, Max Monan
Open Access Library Journal (OALib Journal) , 2019, DOI: 10.4236/oalib.1105439
Abstract:
A sample of ethanolic extracts of the husk of Theobroma cacao L. was scru-tinized using a UHPLC/DAD/MS Thermo scientific Dionex Ultimate 3000 RS coupled to a Thermo scientific LTQ XL mass spectrometer. In addition, about seven different chemical compounds were tentatively identified in this species based on chromatography retention time (Rt), UV and MS/MS spectra and compared with those of isolated authentic compound and literature data. Information obtained from these studies can be used as markers in the identification and standardization of this plant as a herbal remedy and also towards monograph development on the plant.
Bromatological Analysis and Antioxidant Capacity of Hibiscus sabdariffa L. in Cuba  [PDF]
Francis Brown, José González, Enrique C. Cejas, Max Monan, Iván S. Sayago
Open Access Library Journal (OALib Journal) , 2020, DOI: 10.4236/oalib.1105920
Abstract:
Towards authentication and quality assurance of medicinal plants, calyces of Hibiscus sabdariffa L. recollected from the Experimental Station of Medicinal Plants “Dr Juan Tomas Roig” between January and April 2016 were analyzed to determine its bromatological properties (moisture content; dry matter; fat; protein; total ash; mineral contents) and its antioxidant capacity using FRAP assay (24.4 μmol Fe2 /100g of fresh mass). Total ash (6.90%) and moisture content (10.05%) tested are within the World Health Organization (WHO) standards for crude drug from medicinal plants. Mineral contents expressed in mg/100g (Fe: 41.17; Ca: 1522.50; K: 2557.50) are higher than foods that are excellent sources of those nutritional elements. Magnesium (242.50) and Sodium (152.25) contents are satisfactory taking into account the importance of these macrominerals for human body.
GC-MS Characterization of Ethanolic Extract from Croton wagneri Müll. Arg.  [PDF]
José González, Julio Pérez, Max Monan, Osvaldo Rodríguez
Open Access Library Journal (OALib Journal) , 2020, DOI: 10.4236/oalib.1106086
Abstract:
An ethanolic extract at 50% obtained by maceration process was characterized by GC-MS using a Shimadzu QP2010 spectrometer and the Silylation agent was N,O-bis (trimethylsilyl) trifluoroacetamide (BSTFA). The compounds were analyzed using GC/MS NIST21 and NIST107 libraries and having into account the results obtained after phytochemical screening and comparing the results with NISTDEMO Software. After 78 minutes of running 859 chemical components were identified from the sample, and among them, the presence of five essential oils, six triterpenes and/or steroids, an anthracene derivative, six aminoacids or their derivatives, and one flavonoid were tentatively characterized. The sample also contains a lot of amount of reductants sugars and their derivatives, hydrocarbons, and aromatic and/or aliphatic acids (unsaturated and saturated).
Determination of Theobromine and Caffeine in Theobroma cacao Husk from Ethanolic Extract by GC-MS after CC Separation  [PDF]
José González, Max Monan, Julio Perez, Enrique Gómez, Damaris De La C. Salgado, Danae Pérez
Open Access Library Journal (OALib Journal) , 2019, DOI: 10.4236/oalib.1105771
Abstract:
After CC separation of 21 samples from Theobroma cacao Husk was analyzed by GC-MS, from ethanolic extract at 90% was recovered a solid residue of 1 g after several days on the table of the Lab. This main residue (300 mg) was analyzed after successive separations with mixtures of CHCl3: MeOH (7:3) and CHCl3: MeOH (5:5) in CC using Sílica Gel G 60-120 Mesh. All samples were analyzed by TLC on silica gel with fluorescent indicator 254 nm on aluminum cards (layer thickness 0.2 mm) (10 × 20 cm) using CHCl3: MeOH: n-propanol: water (5:6:1:4) as eluent (v/v/v). The presence of Caffeine (CF) and Theobromine (TB) was confirmed after several analyses of the samples by their characteristic fragmentation pattern but nevertheless was found the presence of Theophylline.
Pharmacognostical, Phytochemical and Antioxidant Evaluations of Guettarda calyptrata A. Rich.  [PDF]
Yamilet Irene Gutiérrez Gaitén, José González Yaque, Ramón Scull Lizama, Zuleira Ocanto Torres, Alejandro Felipe González, José Luis Mayoral Jiménez, Max Monan
Open Access Library Journal (OALib Journal) , 2018, DOI: 10.4236/oalib.1104921
Abstract:
Guettarda calyptrata A. Rich., originally from Cuba and known as “Contraguao”, has traditionally been used to counteract quickly and effectively burns produced by Comocladia dentate Jacq (Guao), vegetable species that secretes a highly caustic latex for skin and mucous membranes. A burn is a traumatic injury resulting in local and systemic injury with oxidative changes; in this sense the antioxidants play an important role. In order to offer aspects related to the quality and effectiveness of the plant, its pharmacognostic, phytochemical and antioxidant activity is presented. The morphoanatomical evaluation was carried out, physical-chemical parameters were determined for the crude drug and for the aqueous extract. The chemical profile of the extract was estimated by thin layer chromatography, ultraviolet-visible and quantification of total phenols by Folin-Ciocalteu and total flavonoids by the colorimetric method of aluminum trichloride (AlCl3). Finally, the antioxidant activity was tested by the FRAP and DPPH techniques. Through the pharmacognostic study, the quality specifications of the drug and the extract were established. The methods of analysis used for the chemical profile suggested the presence of flavonoids and phenols in general. The aqueous extract showed antioxidant properties by the two methods evaluated. The study of G. calyptrata provided pharmacognostic, phytochemical and effectiveness as an antioxidant evidence, aspects to consider in the possible use of the plant by our Natural and Traditional Medicine.
Pharmacognostic, Physicochemical and Phytochemical Analysis of Fruits of Talipariti elatum (Sw.) in Cuba  [PDF]
José González, Julio Pérez, Armando Cuéllar, Enrique Gómez, Yamilet I. Gutiérrez, Ramón Scull, Damaris de la C. Salgado, Max Monan
Open Access Library Journal (OALib Journal) , 2019, DOI: 10.4236/oalib.1105300
Abstract:
Talipariti elatum (Sw.) Fryxell is an endemic tree from Cuba, also known as “Majagua”, and has traditionally been used to improve asthmatic crisis and flu, as expectorant, appetitive, emollient, sudorific and laxative. Used as ornamental in park and avenues, its wood is used to make furnitures and baseball baths. In order to offer aspects related to the quality and effectiveness of the plant, its pharmacognostic, physicochemical, and phytochemical parameters of the fruits was realized. Moisture content (13.47%), alcohol extractive value at 95% (4.07%) and water extractive value (7.36%), total ash (3.58%), water soluble ash (0.70%) and acid insoluble ash value (1.56%) were tested for. Phytochemical screening revealed the possible presence of flavonoids, alkaloids, tannins, anthocyanidins, reductants sugars and astringents and/or bitter principles, and the absence of coumarins, saponins, quinones, cardiotonic glycosides and triterpens and/or steroids.
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