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Sample records for hibiscus electronic resource

  1. STUDIES ON HIBISCUS CANNABINUS, HIBISCUS SABDARIFFA, AND CANNABINUS SATIVA PULP TO BE A SUBSTITUTE FOR SOFTWOOD PULP- PART 1: AS-AQ DELIGNIFICATION PROCESS

    OpenAIRE

    Dharm Dutt; J. S. Upadhyaya; C. H. Tyagi

    2010-01-01

    Hibiscus cannabinus, Hibiscus sabdariffa, and Cannabinus sativa, which are renewable non-woody fiber resources having characteristics similar to that of softwood (bast fibers), when used together with hardwood (core fibers), gave higher pulp yield with good mechanical strength properties when using an alkaline sulphite-anthraquinone (AS-AQ) pulping process rather than a conventional kraft pulping process and bleached more readily than kraft and soda pulps with a CEHH bleaching sequence. A com...

  2. Crystal structures of hibiscus acid and hibiscus acid dimethyl ester isolated from Hibiscus sabdariffa (Malvaceae)

    OpenAIRE

    Zheoat, Ahmed M.; Gray, Alexander I.; Igoli, John O.; Kennedy, Alan R.; Ferro, Valerie A.

    2017-01-01

    The biologically active title compounds have been isolated from Hibiscus sabdariffa plants, hibiscus acid as a dimethyl sulfoxide monosolvate [systematic name: (2S,3R)-3-hy?droxy-5-oxo-2,3,4,5-tetra?hydro?furan-2,3-di?carb?oxy?lic acid dimethyl sulfoxide monosolvate], C6H6O7?C2H6OS, (I), and hibiscus acid dimethyl ester [systematic name: dimethyl (2S,3R)-3-hy?droxy-5-oxo-2,3,4,5-tetra?hydro?furan-2,3-di?carboxyl?ate], C8H10O7, (II). Compound (I) forms a layered structure with alternating laye...

  3. Sortiment Hibiscus in beweging

    NARCIS (Netherlands)

    Hoffman, M.H.A.

    2010-01-01

    Hibiscus is hot. Op Plantarium 2009 werden maar liefst acht nieuwe cultivars ter keuring aangeboden. Bovendien winnen de laatste jaren ook andere soorten dan de bekende Hibiscus syriacus aan populariteit

  4. Studies on mutation breeding of hibiscus Syriacus

    International Nuclear Information System (INIS)

    Song, Heui Sub; Lee, Ki Woon; Im, Yong Taek

    1994-12-01

    Hibiscus(Hibiscus syracuse L.) has been know as a national flower of Korea science old times. Although there are some ancient records that the Hibiscus had been planted in large quantities in Korea, Japanese had dug out all the good plants of Hibiscus in this country during their colonial period. But Hibiscus has such a characteristics of self-incompatibility that all the plants exist as a hybrid naturally and have heterogeneous genes. Therefore many good characters can be taken out from the surviving plants. Many domestic 78 varieties of Hibiscus syracuse were collected and propagated 26 varieties cuttings. Radiosensitivity of gamma-ray irradiated Hibiscus syracuse were investigated the germination rate, survival rate, plant height was with the increase of 4 kR better than control. The radiation doses of 10-12 kR are recommended for mutation breeding of Hibiscus. 6 figs, 11 tabs, 41 refs. (Author)

  5. Studies on mutation breeding of hibiscus Syriacus

    Energy Technology Data Exchange (ETDEWEB)

    Song, Heui Sub; Lee, Ki Woon; Im, Yong Taek [Korea Atomic Energy Research Institute, Taejon (Korea, Republic of)

    1994-12-01

    Hibiscus(Hibiscus syracuse L.) has been know as a national flower of Korea science old times. Although there are some ancient records that the Hibiscus had been planted in large quantities in Korea, Japanese had dug out all the good plants of Hibiscus in this country during their colonial period. But Hibiscus has such a characteristics of self-incompatibility that all the plants exist as a hybrid naturally and have heterogeneous genes. Therefore many good characters can be taken out from the surviving plants. Many domestic 78 varieties of Hibiscus syracuse were collected and propagated 26 varieties cuttings. Radiosensitivity of gamma-ray irradiated Hibiscus syracuse were investigated the germination rate, survival rate, plant height was with the increase of 4 kR better than control. The radiation doses of 10-12 kR are recommended for mutation breeding of Hibiscus. 6 figs, 11 tabs, 41 refs. (Author).

  6. Hibiscus tiliaceus L

    Science.gov (United States)

    James A. Allen

    2002-01-01

    The genus Hibiscus includes about 200 species distributed primarily in the tropical and subtropical regions of the world. It is a highly variable genus, with relatively few characteristics in common (Wagner and others 1990). Hibiscus tiliaceus is one of the most widespread species in the genus, with a pantropical, mainly...

  7. Protective role of aqueous extract of Hibiscus sabdariffa (calyx ...

    African Journals Online (AJOL)

    USER

    2010-05-24

    May 24, 2010 ... of electron on the electron transport chain. There is a dose-dependent relationship between lipid peroxidation induced by potassium bromate and the protection offered by the extract of H. sabdariffa. REFERENCES. Alli MB, Salih M (1991). Investigation of the antispasmodic potential of. Hibiscus sabdariffa ...

  8. Crystal structures of hibiscus acid and hibiscus acid dimethyl ester isolated from Hibiscus sabdariffa (Malvaceae).

    Science.gov (United States)

    Zheoat, Ahmed M; Gray, Alexander I; Igoli, John O; Kennedy, Alan R; Ferro, Valerie A

    2017-09-01

    The biologically active title compounds have been isolated from Hibiscus sabdariffa plants, hibiscus acid as a dimethyl sulfoxide monosolvate [systematic name: (2 S ,3 R )-3-hy-droxy-5-oxo-2,3,4,5-tetra-hydro-furan-2,3-di-carb-oxy-lic acid dimethyl sulfoxide monosolvate], C 6 H 6 O 7 ·C 2 H 6 OS, (I), and hibiscus acid dimethyl ester [systematic name: dimethyl (2 S ,3 R )-3-hy-droxy-5-oxo-2,3,4,5-tetra-hydro-furan-2,3-di-carboxyl-ate], C 8 H 10 O 7 , (II). Compound (I) forms a layered structure with alternating layers of lactone and solvent mol-ecules, that include a two-dimensional hydrogen-bonding construct. Compound (II) has two crystallographically independent and conformationally similar mol-ecules per asymmetric unit and forms a one-dimensional hydrogen-bonding construct. The known absolute configuration for both compounds has been confirmed.

  9. A review on phytochemistry and therapeutic uses of Hibiscus sabdariffa L.

    Science.gov (United States)

    Riaz, Ghazala; Chopra, Rajni

    2018-06-01

    Hibiscus sabdariffa L. (roselle) belonging to the Malvaceae family is widely grown in many countries. This plant is often used in the traditional medicine being rich in phytochemicals like polyphenols especially anthocyanins, polysaccharides and organic acids thus having enormous prospective in modern therapeutic uses. The study aimed to review and document all the available evidence and information about the calyces of Hibiscus sabdariffa (roselle) with the special focus on their nutritional composition, bioactive constituents and therapeutic uses. The electronic database was searched up to 2017, using keywords Hibiscus sabdariffa, chemical constituents of roselle, therapeutic uses of roselle. Journals, books and conference proceedings were also searched. The review provides valuable information about the nutraceutical component of Hibiscus sabdariffa L. and their utilization for curing various degenerative diseases like hypertension, hyperlipidemia, cancer and other inflammatory diseases of liver and kidney. Their toxicological effects have also been discussed from a safety point of view. Most studies supported and provided the scientific basis for the statement that Hibiscus sabdariffa and their active constituents play an important role in the prevention of chronic and degenerative diseases that are associated with oxidative stress. Our study suggests, that good research is needed, to establish a potential strategy that can balance the pharmacological and toxic effects of roselle and standardized fingerprint of Hibiscus sabdariffa is required internationally for quality control. Copyright © 2018 Elsevier Masson SAS. All rights reserved.

  10. Comparison of metabolic profiles and bioactivities of the leaves of three edible Congolese Hibiscus species.

    Science.gov (United States)

    Kapepula, Paulin Mutwale; Kabamba Ngombe, Nadege; Tshisekedi Tshibangu, Pascal; Tsumbu, César; Franck, Thierry; Mouithys-Mickalad, Ange; Mumba, Dieudonné; Tshala-Katumbay, Désiré; Serteyn, Didier; Tits, Monique; Angenot, Luc; Kalenda, Pascal Dibungi T; Frédérich, Michel

    2017-12-01

    Methanolic and dichloromethane extracts from the leaves of Congolese Hibiscus species were characterised by chromatographic and spectroscopic techniques and their in vitro biochemical activities against ROS production were evaluated in cellular models and on an enzyme, myeloperoxidase (MPO), involved in inflammation. Hibiscus acetosella has a chemical fingerprint different from Hibiscus cannabinus and Hibiscus sabdariffa both having similar fingerprints. Major compounds were polyphenols, represented mainly by caffeoyl-hydroxycitric acid for H. acetosella and neochlorogenic acid for the two other species. All extracts displayed high cellular antioxidant activity with IC 50 values ranging from 0.5 to 3 μg mL -1 using lucigenin on neutrophils. Dichloromethane extracts showed more efficient effects on extracellular ROS production and MPO activity. Antioxidant and anti-inflammatory activities of caffeoyl-hydroxycitric acid were significantly higher than those of neochlorogenic acid. The bioactivities of Hibiscus species were positively correlated with their phytochemical content and could justify their use as local nutraceutical resources and medicines.

  11. 'Lufkin Red' and 'Lufkin White' winter-hardy hibiscus (Hibiscus x laevis All.)

    Science.gov (United States)

    USDA ARS announces the release of ‘Lufkin Red’ and ‘Lufkin White’ winter-hardy native hibiscuses.Both clones have desirable horticultural traits in combination with demonstrated high levels of field resistance to the leaf spot complex that is problematic on winter-hardy hibiscus clones in areas wit...

  12. Hibiscus acetosella 'Sahara Sunset'

    Science.gov (United States)

    The Agricultural Research Service, United States Department of Agriculture, hereby release to nurserymen a new African Hibiscus, Hibiscus acetosella Welw. ex Hiern., named ‘Sahara Sunset’. This cultivar, tested as HAC06-11 was selected from a group seedlings grown at the Thad Cochran Southern Horti...

  13. (Psidium guajava), hibiscus (Hibiscus-rosa sinensis)

    African Journals Online (AJOL)

    SAM

    2014-04-30

    Hibiscus-rosa ... properly before consumption to avoid ingestion of possible food pathogens that cause food-borne ... depending on the one that most supports their growth ..... boundary leaf, these compounds which include CO2,.

  14. Hibiscus

    Science.gov (United States)

    ... uterus; reduce swelling; and work like antibiotics to kill bacteria and worms. ... Herbs and supplements that might lower blood pressureHibiscus may lower blood pressure. Using it along with other ...

  15. Ekstraksi dan Uji Stabilitas Zat Warna Alami dari Bunga Kembang Sepatu (Hibiscus rosa-sinensis L dan Bunga Rosela (Hibiscus sabdariffa L

    Directory of Open Access Journals (Sweden)

    Yusraini Dian Inayati Siregar

    2017-03-01

    Full Text Available Ekstraksi dan Uji Stabilitas Zat Warna Alami dari Bunga Kembang Sepatu (Hibiscus rosa-sinensis L dan Bunga Rosela (Hibiscus sabdariffa L telah dilakukan. Penelitian bertujuan untuk mengekstraksi bunga kembang sepatu dan bunga rosella dengan mencari temperatur dan konsentrasi yang optimum untuk mendapatkan pigmen dari bunga kembang sepatu dan bunga rosella dengan pelarut air dan etanol, selain itu dilakukan juga uji stabilitas zat warna. Analisa kadar zat warna dilakukan dengan metode spektrofotometri. Hasil ekstrasi optimum menggunakan metode maserasi dengan pelarut air  adalah pada temperatur 90°C dan dengan pelarut etanol pada konsentrasi 96 %.Uji stabilitas warna memberikan hasil sebagai berikut: a Kondisi penyimpanan, sinar matahari dan sinar lampu dapat mempengaruhi stabilitas zat warna ekstrak Hibiscus rosa-sinensis L dan Hibiscus sabdariffa L dengan meningkatnya nilai absorbansi pada kedua ekstrak. b Penambahan oksidator, H2O2 dapat mempengaruhi stabilitas zat warna ekstrak Hibiscus rosa-sinensis L dan Hibiscus sabdariffa L dengan perubahan dari ekstrak berwarna menjadi ekstrak tidak berwarna karena menghasilkan turunan asam benzoat. c Nilai pH yang semakin meningkat, dari pH 4 ke pH 5, mempengaruhi stabilitas zat warna ekstrak Hibiscus rosa-sinensis L dan Hibiscus sabdariffa L dengan perubahan ekstrak berwarna menjadi tidak berwarna karena terbentuknya basa kuinodal.   Kata Kunci: Ekstraksi, Hibiscus rosa-sinensis L, Hibiscus sabdariffa L, Spektrofotometri UV-Vis

  16. Effect of extract of Hibiscus on the ultrastructure of the testis in adult mice.

    Science.gov (United States)

    Mahmoud, Yomna Ibrahim

    2012-07-01

    Hibiscus sabdariffa extract is a popular beverage in many tropical and sub-tropical countries. Although, Hibiscus tea is known for its medicinal effects for thousands of years, scientific evidence of its systemic safety is very limited. The current study aimed to assess the potential adverse effects of H. sabdariffa extract on sperm morphology and testicular ultrastructure of albino mice. Thirty adult male albino mice were divided into three equal groups and were given: (a) distilled water, (b) cold Hibiscus aqueous extract, and (c) boiled Hibiscus aqueous extract. Hibiscus extract was administered orally daily for 4 weeks in a dose of 200 mg/kg body weight/mouse. Twenty-four hours after the last treatment, mice were decapitated and the testes and epididymides were excised and processed for transmission electron microscopy to assess ultrastructural and sperm abnormalities. The results clearly demonstrate that aqueous extracts from dried calyx of H. sabdariffa, either cold or boiled, alter normal sperm morphology and testicular ultrastructure and adversely influence the male reproductive fertility in albino mice. The current data suggest that Hibiscus extract should be consumed with caution, and reasonable estimates of the human risk associated with its consumption should be provided. Copyright © 2011 Elsevier GmbH. All rights reserved.

  17. Studies on mutant breeding of Hibiscus syriacus

    International Nuclear Information System (INIS)

    Song, Hi Sup; Kim, Jin Kyu; Lee, Ki Un; Kim, Young Taik.

    1997-01-01

    Hibiscus has been known as a national flower of Korea. Hibiscus has such a characteristic of self-incompatibility that all the plant exist as natural hybrids and have heterogeneous genes. Many domestic 91 varieties of Hibiscus syriacus were collected. Radiosensitivity of H. Syriacus irradiated with γ-ray was investigated in plant cuttings. The plant height was reduced by 45% in 5KR irradiated group, compared to control group. The radiation dose of 5KR could be recommended for mutation breeding of Hibiscus cuttings. Radiosensitivity of γ-ray irradiated Hibiscus seed were investigated. The germination rate, survival rate and plant height was better in the 4KR irradiation plot than control. The radiation dose of 10∼12KR are recommended for mutation breeding of Hibiscus. Promising mutant lines were selected form the varieties of Hwarang, Wolsan no. 176, Ilpyondansim, Emille, Hanol, Yongkwang, Saeyongkwang, Chungmu, Imjinhong, Arang, Hungdansim-1 and Hongdansim-2. (author). 66 refs., 16 tabs., 13 figs

  18. Studies on mutant breeding of Hibiscus syriacus

    Energy Technology Data Exchange (ETDEWEB)

    Song, Hi Sup; Kim, Jin Kyu; Lee, Ki Un; Kim, Young Taik

    1997-01-01

    Hibiscus has been known as a national flower of Korea. Hibiscus has such a characteristic of self-incompatibility that all the plant exist as natural hybrids and have heterogeneous genes. Many domestic 91 varieties of Hibiscus syriacus were collected. Radiosensitivity of H. Syriacus irradiated with {gamma}-ray was investigated in plant cuttings. The plant height was reduced by 45% in 5KR irradiated group, compared to control group. The radiation dose of 5KR could be recommended for mutation breeding of Hibiscus cuttings. Radiosensitivity of {gamma}-ray irradiated Hibiscus seed were investigated. The germination rate, survival rate and plant height was better in the 4KR irradiation plot than control. The radiation dose of 10{approx}12KR are recommended for mutation breeding of Hibiscus. Promising mutant lines were selected form the varieties of Hwarang, Wolsan no. 176, Ilpyondansim, Emille, Hanol, Yongkwang, Saeyongkwang, Chungmu, Imjinhong, Arang, Hungdansim-1 and Hongdansim-2. (author). 66 refs., 16 tabs., 13 figs.

  19. 'USS Alabama', 'USS Mississippi', 'USS Missouri', 'USS Tennessee' and 'USS Texas' Chinese hibiscus (Hibiscus rosa-sinenis L.)

    Science.gov (United States)

    Five new Chinese hibiscus cultivars are products from a planned hibiscus breeding program conducted by the inventors at Poplarville, MS. The goal of the research is to produce new clones with a combination of desirable horticultural traits. Desirable floral traits include early bloom, uniform flower...

  20. The flower of Hibiscus trionum is both visibly and measurably iridescent.

    Science.gov (United States)

    Vignolini, Silvia; Moyroud, Edwige; Hingant, Thomas; Banks, Hannah; Rudall, Paula J; Steiner, Ullrich; Glover, Beverley J

    2015-01-01

    Living organisms can use minute structures to manipulate the reflection of light and display colours based on interference. There has been debate in recent literature over whether the diffractive optical effects produced by epoxy replicas of petals with folded cuticles persist and induce iridescence in the original flowers when the effects of petal pigment and illumination are taken into account. We explored the optical properties of the petal of Hibiscus trionum by macro-imaging, scanning and transmission electron microscopy, and visible and ultraviolet (UV) angle-resolved spectroscopy of the petal. The flower of Hibiscus trionum is visibly iridescent, and the iridescence can be captured photographically. The iridescence derives from a diffraction grating generated by folds of the cuticle. The iridescence of the petal can be quantitatively characterized by spectrometric measurements with several square-millimetres of sample area illuminated. The flower of Hibiscus trionum has the potential to interact with its pollinators (honeybees, other bees, butterflies and flies) through iridescent signals produced by its cuticular diffraction grating. © 2014 The Authors. New Phytologist © 2014 New Phytologist Trust.

  1. Microbial composition of guava (Psidium guajava), hibiscus ...

    African Journals Online (AJOL)

    Microbial composition of guava (Psidium guajava), hibiscus (Hibiscus-rosa sinensis), mango (Mangifera indica) and pumpkin (Telfairia occidentalis Hook) ... African Journal of Biotechnology ... The microbial genera isolated from this study showed that, both human and plant pathogens can colonize plants' phyllosphere.

  2. Effect of Hibiscus sabdariffa on obesity in MSG mice.

    Science.gov (United States)

    Alarcon-Aguilar, Francisco J; Zamilpa, Alejandro; Perez-Garcia, Ma Dolores; Almanza-Perez, Julio C; Romero-Nuñez, Eunice; Campos-Sepulveda, Efrain A; Vazquez-Carrillo, Laura I; Roman-Ramos, Ruben

    2007-10-08

    The aim of the present investigation was determine whether a standardized Hibiscus sabdariffa calyces aqueous extract has an effect on body weight in an obese animal model induced by the administration of monosodium glutamate. Hibiscus sabdariffa aqueous extract, containing 33.64 mg of total anthocyanins per each 120 mg of extract, was orally administered (120 mg/kg/day) for 60 days to healthy and obese mice, and body weight gain, food and liquid intake, aspartate aminotransferase (AST), alanine aminotransferase (ALT), cholesterol, and triglycerides levels were measured. Hibiscus sabdariffa administration significantly reduced body weight gain in obese mice and increased liquid intake in healthy and obese mice. ALT levels were significantly increased on the 15th and 45th days in obese mice, but AST levels did not show significant changes. Mortality was not observed in the Hibiscus sabdariffa treated groups. Triglycerides and cholesterol levels showed non-significant reductions in animals treated with Hibiscus sabdariffa. Our data confirm the anti-obesity effect of Hibiscus sabdariffa reported by the Mexican population.

  3. Phytomining of heavy metals from soil by Hibiscus radiatus using phytoremediationtechnology (Part-2)

    Science.gov (United States)

    Panchal, K. J.; Subramanian, R. B.; Gohil, T. P.

    2017-12-01

    Metal ions are not only valuable intermediates in metal extraction, but also important raw materials fortechnical applications. They possess some unique but, identical physical and chemical properties, whichmake them useful probes of low temperature geochemical reactions. Heavy metals are natural constituentsof the earth's crust, but indiscriminate human activities have drastically altered their geochemical cyclesand biochemical balance. Metal concentration in soil typically ranges from less than one to as high as100,000 mg/kg. Heavy metal contaminations of land resources continue to be the focus of numerousenvironmental studies and attract a great deal of attention worldwide. This is attributed to nobiodegradabilityand persistence of heavy metals in soils. Prolonged exposure to heavy metals such ascadmium, copper, lead, nickel, and zinc can cause deleterious health effects in humans. Complexation,separation, and removal of metal ions have become increasingly attractive areas of research and have ledto new technical developments like phytoremediation that has numerous biotechnological implications ofunderstanding of plant metal accumulation. Hibiscus radiatus is newly identified as a potential heavymetal hypreaccumulator. In this study Hibiscus radiatus was subjected for in vitro heavy metalaccumulation, to explore the accumulation pattern of four heavy metals viz Cadmium, Lead, Nickel andZinc in various parts of Hibiscus radiatus plant parts. Translocation of metals in Hibiscus radiatus plant parts from soil makes this plant an eligible candidate to remove heavy metals from soil.

  4. Direct genetic transformation of Hibiscus sabdariffa L.

    African Journals Online (AJOL)

    Administrator

    After 60 days evaluation point, the assessment of the transformation by PCR revealed that H. sabdariffa line tested, carried the nptII gene. Key words: Hibiscus sabdariffa, genetic transformation. INTRODUCTION. Hibiscus sabdariffa is a crop widely cultivated in Sub. Saharan Africa, growing on sandy soils after the harvest.

  5. Studies on mutation breeding of hibiscus syriacuse

    Energy Technology Data Exchange (ETDEWEB)

    Song, Hee Sub; Kim, Jin Kyu; Lee, Ki Un; Lim, Yong Taek [Korea Atomic Energy Research Institute, Taejon (Korea, Republic of)

    1995-12-01

    Hibiscus has been known as a national flower of Korea. Hibiscus has ahch a characteristic of self-incompatibility that all the plants exist as natural hybrids and have heterogeneous genes. Thirth two domestic varieties were propagated. Radiosensitivity of H. syriacus irradiated with gamma ray was investigated in plant cuttings. The plant height was reduced by 45 percent in 5 kR irradiated group compared to control group. The radiation dose of 5 kR could be rrecommended for mutation breeding of Hibiscus cuttings. Promising mutant lines were selected form the varieties of Hwarang Wolsan 176, I1pyondansim and Emille. 6 tabs., 2 figs., 13 refs., 4 ills. (Author).

  6. Studies on mutation breeding of hibiscus syriacuse

    International Nuclear Information System (INIS)

    Song, Hee Sub; Kim, Jin Kyu; Lee, Ki Un; Lim, Yong Taek

    1995-12-01

    Hibiscus has been known as a national flower of Korea. Hibiscus has ahch a characteristic of self-incompatibility that all the plants exist as natural hybrids and have heterogeneous genes. Thirth two domestic varieties were propagated. Radiosensitivity of H. syriacus irradiated with gamma ray was investigated in plant cuttings. The plant height was reduced by 45 percent in 5 kR irradiated group compared to control group. The radiation dose of 5 kR could be rrecommended for mutation breeding of Hibiscus cuttings. Promising mutant lines were selected form the varieties of Hwarang Wolsan 176, I1pyondansim and Emille. 6 tabs., 2 figs., 13 refs., 4 ills. (Author)

  7. Xyloglucan, hibiscus and propolis for the prevention of urinary tract infections: results of in vitro studies.

    Science.gov (United States)

    Fraile, Benito; Alcover, Javier; Royuela, Mar; Rodríguez, David; Chaves, Concepción; Palacios, Ricardo; Piqué, Núria

    2017-06-01

    To assess the properties of a medical device containing xyloglucan, propolis and hibiscus to create a bioprotective barrier to avoid the contact of uropathogenic Escherichia coli strains on cell walls in models of intestinal (CacoGoblet) and uroepithelial (RWPE-1) cells (derived from normal human prostate epithelium). Two uropathogenic E. coli strains (expressing type 1 fimbriae and P fimbriae) were used to assess, by electronic microscopy and ELISA, the barrier properties of the medical device. The antimicrobial activity was assessed in broth dilution assays. The three components (xyloglucan, propolis and hibiscus) did not alter E. coli cell integrity in intestinal and uroepithelial cell models and were devoid of antibacterial activity. The three components avoided bacterial contact in both cell monolayers. The nonpharmacological barrier properties of xyloglucan, propolis and hibiscus confirm the role of the medical device for the management of urinary tract infections.

  8. [Molecular identification of Hibiscus syriacus and its adulterants using ITS2 barcode].

    Science.gov (United States)

    Liu, Yi-Mei; Jin, Li-Na; Xiong, Yong-Xin; Wu, Lan; Chen, Ke-Li

    2014-03-01

    To identify Hibiscus syriacus and its adulterants using DNA barcoding technique. Nine samples of five species were PCR amplified and sequenced, and twelve samples were downloaded from the GenBank. The intra-specific and interspecific K2P distances were calculated, and neighbor-joining( NJ) tree was constructed by MEGA 5.0. The results showed the intra-specific genetic distances of Hibiscus syriacus were ranged from 0.009 to 0.056, which were far lower than inter-specific genetic distances between Hibiscus syriacus and its adulterants (0.236 - 0.301). Variable sites within Hibiscus syriacus ranged from 2 to 9 which were far less than the adulterants (45 - 52); Different samples of Hibiscus syriacus were gathered together and could be distinguished from its adulterants by NJ tree. ITS2 can discriminate Hibiscus syriacus from its adulterants correctly. The ITS2 region is an efficient barcode for authentication of Hibiscus syriacus and its adulterants.

  9. Extraction of total polyphenols from hibiscus (Hibiscus sabdariffa L. and waxweed / ‘sete-sangrias’ (Cuphea carthagenensis and evaluation of their antioxidant potential

    Directory of Open Access Journals (Sweden)

    Daniele Begmeier

    2014-02-01

    Full Text Available Current research investigates the extraction process of total polyphenols from hibiscus (Hibiscus sabdariffa L. and waxweed (Brazilian name: ‘sete-sangrias’ (Cuphea carthagenensis and evaluates the antioxidant potential of their extracts. The extraction stage comprised investigation on the following parameters: i solvents (acetone and ethanol pure and fractioned with water; ii variables (temperature, stirring, solvent ratio, time and pH. Total polyphenols were quantified by Folin-Ciocalteau reagent and antioxidant activity was determined by ABTS•+ (2,2′-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid and DPPH (2,2-diphenyl-1-picrylhydrazyl radical scavenging assay. Results showed that, depending on experimental conditions, total phenolic contents for hibiscus and waxweed ranged between 460.86 mg GAE 100 g-1 and 5012.54 mg GAE 100 g-1 and between 462.86 mg GAE 100 g-1 and 4215.99 mg GAE 100 g-1, respectively. Waxweed had a higher antioxidant activity when compared to that of hibiscus by both ABTS•+ and DPPH. Data showed that hibiscus and waxweed have a significant amount of polyphenols which may be extracted in mild processing conditions and then employed as natural antioxidant sources in industrial processes.

  10. Antioxidant and drug detoxification potentials of Hibiscus sabdariffa anthocyanin extract.

    Science.gov (United States)

    Ajiboye, Taofeek O; Salawu, Nasir A; Yakubu, Musa T; Oladiji, Adenike T; Akanji, Musbau A; Okogun, Joseph I

    2011-04-01

    The antioxidant and drug metabolizing potentials of Hibiscus anthocyanin extract in CCl(4)- induced oxidative damage of rat liver was investigated. Hibiscus anthocyanin extract effectively scavenge α-diphenyl-β-picrylhydrazyl (DPPH) radical, superoxide ion, and hydrogen peroxide. It produced a 92% scavenging effect of DPPH radical at a concentration of 2.0 mg/mL. Hibiscus anthocyanin extract produced a 69 and 90% scavenging effect on superoxide ion and hydrogen peroxide, respectively, at 1.0 mg/mL, which compared favorably with the synthetic antioxidant (butylated hydroanisole and α-tocopherol). A reducing power of this anthocyanin was examined using K(3)Fe(CN)(6). Hibiscus anthocyanin extract has reducing power that is approximately 2-fold that of the synthetic antioxidant, butylated hydroanisole. Hibiscus anthocyanin extract produced a significantly increase and completely attenuated the CCl(4)-mediated decrease in antioxidant enzymes (e.g., catalase, superoxide dismutase, glutathione peroxidase, and glutathione reductase). However, the level of nonenzymic antioxidant molecules (i.e., vitamins C and E) were significant preserved by Hibiscus anthocyanin extract. There was an induction of phase II drug-detoxifying enzymes: glutathione S-transferase, NAD(H):quinone oxidoreductase, and uridyl diphosphoglucuronosyl transferase by 65, 45, and 57%, respectively. In view of these properties, Hibiscus sabdariffa anthocyanin extract can act as a prophylactic by intervening as a free radical scavenger both in vitro and in vivo as well as inducing the phase II drug detoxification enzymes.

  11. Hibiscus sabdari

    African Journals Online (AJOL)

    AISA

    Roselle (Hibiscus sabdariffa L.) is a malvaceae cultivated mainly for food and manufacture of textile fibers. ... confection d'un jus délicieux appelé « bissap » ... sorgho. La production africaine ne représente qu'environ 2 % de la production mondiale de fibres textiles. Les travaux conduits sur cette plante en Afrique ont ...

  12. Short-term regulation and alternative pathways of photosynthetic electron transport in Hibiscus rosa-sinensis leaves.

    Science.gov (United States)

    Trubitsin, Boris V; Vershubskii, Alexey V; Priklonskii, Vladimir I; Tikhonov, Alexander N

    2015-11-01

    In this work, using the EPR and PAM-fluorometry methods, we have studied induction events of photosynthetic electron transport in Hibiscus rosa-sinensis leaves. The methods used are complementary, providing efficient tools for in situ monitoring of P700 redox transients and photochemical activity of photosystem II (PSII). The induction of P700(+) in dark-adapted leaves is characterized by the multiphase kinetics with a lag-phase, which duration elongates with the dark-adaptation time. Analyzing effects of the uncoupler monensin and artificial electron carrier methylviologen (MV) on photooxidation of P700 and slow induction of chlorophyll a fluorescence (SIF), we could ascribe different phases of transient kinetics of electron transport processes in dark-adapted leaves to the following regulatory mechanisms: (i) acceleration of electron transfer on the acceptor side of PSI, (ii) pH-dependent modulation of the intersystem electron flow, and (iii) re-distribution of electron fluxes between alternative (linear, cyclic, and pseudocyclic) pathways. Monensin significantly decreases a level of P700(+) and inhibits SIF. MV, which mediates electron flow from PSI to O2 with consequent formation of H2O2, promotes a rapid photooxidation of P700 without any lag-phase peculiar to untreated leaves. MV-mediated water-water cycle (H2O→PSII→PSI→MV→O2→H2O2→H2O) is accompanied by generation of ascorbate free radicals. This suggests that the ascorbate peroxidase system of defense against reactive oxygen species is active in chloroplasts of H. rosa-sinensis leaves. In DCMU-treated chloroplasts with inhibited PSII, the contribution of cyclic electron flow is insignificant as compared to linear electron flow. For analysis of induction events, we have simulated electron transport processes within the framework of our generalized mathematical model of oxygenic photosynthesis, which takes into account pH-dependent mechanisms of electron transport control and re-distribution of

  13. Mutagenesis of hibiscus rosa-sinensis

    International Nuclear Information System (INIS)

    Shuhaimi Shamsudin; Shakinah Salleh; Mohd Nazir Basiran

    2005-01-01

    Mutation induction is an alternative method to create more variation in Hibiscus rosa-sinensis. Radiosensitivity test was carried out to determine the effective doses for irradiation of stem cuttings. Stem cuttings of Hibiscus rosa-sinensis were irradiated at 10, 20, 30 and 60 Gy using a gamma cell with a Co-60 source at a dose rate of 1.66 Gys -1 . Irradiated stem cuttings were planted in sand-beds and data on the number of growing shoots were taken. Increasing gamma ray doses resulted in a reduction of growing shoots on the irradiated stem cuttings. It was shown that the LD50 for the stem cuttings was 36.2 Gy and at 75% growth was 17.15 Gy. Based on these results, 20 to 30 Gy were chosen for irradiation of the stem cuttings to induce mutation in Hibiscus rosa-sinensis. Irradiated stem cuttings were then planted into sand-beds for rooting. After one month, the rooted stems were transferred into polybags and allowed to grow under 70% shade provided by plastic netting and the variants were subsequently observed. Three variants with variation in flower shapes and colours were obtained. (Author)

  14. Effects of Hibiscus sabdariffa L. on serum lipids: a systematic review and meta-analysis.

    Science.gov (United States)

    Aziz, Zoriah; Wong, Su Yuen; Chong, Nyuk Jet

    2013-11-25

    Prevention of cardiovascular disease by modifying its major risk factors, including serum cholesterol levels, is an important strategy. Hibiscus sabdariffa L. has been promoted for reducing cholesterol levels, but its reported impact on cholesterol levels has been inconsistent. The study aimed to assess systematically the evidence and quality of current research on the effect of Hibiscus sabdariffa L. on blood lipids and its adverse effects. Electronic databases were searched up to June 2013 for relevant randomised controlled trials (RCTs). Journals and conference proceedings were also searched. The quality of the selected trials was assessed using the Cochrane Risk of Bias Assessment Tool. The efficacy results of similar studies were pooled if they used the same comparator. Outcomes examined were levels of total cholesterol, high density lipoprotein cholesterol, low density lipoprotein cholesterol and triglycerides. Six studies involving 474 subjects met our inclusion criteria. These studies varied in terms of the types of interventions, comparators used, and duration of trials. Overall, Hibiscus sabdariffa L. did not produce any significant effect on any of the outcomes examined, when compared with placebo, black tea or diet. With short-term use it is well tolerated. The available evidence from RCTs does not support the efficacy of Hibiscus sabdariffa L. in lowering serum lipids. Further rigorously designed trials with larger sample sizes are warranted to confirm the effects of HS on serum lipids. © 2013 Elsevier Ireland Ltd. All rights reserved.

  15. Isolation and Characterization of Anthocyanins from Hibiscus sabdariffa Flowers.

    Science.gov (United States)

    Grajeda-Iglesias, Claudia; Figueroa-Espinoza, Maria C; Barouh, Nathalie; Baréa, Bruno; Fernandes, Ana; de Freitas, Victor; Salas, Erika

    2016-07-22

    The intense red-colored Hibiscus sabdariffa flowers are an inexpensive source of anthocyanins with potential to be used as natural, innocuous, and health-beneficial colorants. An anthocyanin-rich extract from hibiscus flowers was obtained by ultrasound-assisted extraction. By a single-step process fractionation using a Sep-Pak C18 cartridge, the main hibiscus anthocyanins, delphinidin-3-O-sambubioside (Dp-samb) and cyanidin-3-O-sambubioside (Cy-samb), were separated and then characterized via NMR and HPLC-ESIMS data. Since Dp-samb was the most abundant anthocyanin identified in the extract, its colorant properties were studied by the pH jumps method, which allowed the calculation of the single acid-base equilibrium (pK'a 2.92), the acidity (pKa 3.70), and the hydration constants (pKh 3.02). Moreover, by using size-exclusion chromatography, new cyanidin-derived anthocyanins (with three or more sugar units) were successfully identified and reported for the first time in the hibiscus extract.

  16. Effects of aqueous extracts of Hibiscus sabdariffa calyces and ...

    African Journals Online (AJOL)

    The effects of aqueous extracts of the leaves of Ocimum gratissimum and calyces of Hibiscus sabdariffa on intestinal transit were determined in experimental rats The leaves of Ocimum gratissimum were oven dried and then pulverized. The dried calyces of Hibiscus sabdariffa were also pulverized. 10% extracts of both ...

  17. Pharmacological characterization of the diuretic effect of Hibiscus sabdariffa Linn (Malvaceae) extract.

    Science.gov (United States)

    Alarcón-Alonso, Javier; Zamilpa, Alejandro; Aguilar, Francisco Alarcón; Herrera-Ruiz, Maribel; Tortoriello, Jaime; Jimenez-Ferrer, Enrique

    2012-02-15

    Hibiscus sabdariffa L. (Malvaceae) populary known in Mexico as "Jamaica", "flor de Jamaica", has widely used in Mexican Traditional Medicine as antihypertensive and diuretic, although the latter activity has been reported the present work show evidence about the diuretic, natriuretic and potassium-sparing effects. To evaluate the diuretic activity of Hibiscus sabdariffa aqueous extract on in vivo and in situ models. The Hibiscus sabdariffa aqueous extract was administrated in increasing doses and evaluated the diuresis produced and disposal of electrolytes. Moreover, in isolated kidney was determined the renal filtration rate with plant extract, furosemide and amiloride. The yield of Hibiscus sabdariffa aqueous extraction was 28.3% and the chemical standardization from 1 g of extract was: 56.5 mg delphinidin-3-O-sambubioside, 20.8 mg/g cyanidin-3-O-sambubioside, 3.2 mg/g quercetin, 2.1 mg/g rutin and 2.7 mg/g chlorogenic acid. The diuretic and natriuretic effect of Hibiscus sabdariffa aqueous extract showed a dose-dependent behavior. The pharmacological constants of natriuretic effect was ED50=86 mg/kg and Emax=0.9 mEq/100 g/5 h. In the model of kidney in situ was observed that renal filtration increased 48% with the aqueous extract of Hibiscus sabdariffa and an additive effect when was perfuse with furosemide. The compound presents in Hibiscus sabdariffa as quercetin had effect on the vascular endothelium causing oxide nitric release, increasing renal vasorelaxation by increasing kidney filtration. Therefore, the diuretic effect of Hibiscus sabdariffa may be mediated by nitric oxide release. Copyright © 2011 Elsevier Ireland Ltd. All rights reserved.

  18. Verbeter Hibiscus met voeding

    NARCIS (Netherlands)

    Aendekerk, T.G.L.

    2003-01-01

    Onderzoek naar de invloed van pH en de voedingsoplossing op groeiafwijkingen bij Hibiscus. Gegevens in bijgaande tabellen: 1) Gebruikte voedingsoplossingen (waarden in mmol/l); 2) Beoordeling bij gebruikte voedingsoplossingen; 3) Optimale voedingsoplossingen (waarden in mmol/l) in twee periodes; 4)

  19. Two New Disease-Resistant Hibiscus: 'Lufkin Red' and 'Lufkin White'

    Science.gov (United States)

    The Agricultural Research Service, United States Department of Agriculture, has released Hibiscus laevis ‘Lufkin Red’ and ‘Lufkin White’, two new hardy native ornamental hibiscus. These cultivars are recommended for trial by gardeners and horticulturists as summer flowering perennial landscape pl...

  20. Ekstraksi Dan Uji Stabilitas Zat Warna Alami Dari Bunga Kembang Sepatu (Hibiscus Rosa-sinensis L) Dan Bunga Rosela (Hibiscus Sabdariffa L)

    OpenAIRE

    Siregar, Yusraini Dian Inayati; Nurlela, Nurlela

    2011-01-01

    Ekstraksi dan Uji Stabilitas Zat Warna Alami dari Bunga Kembang Sepatu (Hibiscus rosa-sinensis L) dan Bunga Rosela (Hibiscus sabdariffa L) telah dilakukan. Penelitian bertujuan untuk mengekstraksi bunga kembang sepatu dan bunga rosella dengan mencari temperatur dan konsentrasi yang optimum untuk mendapatkan pigmen dari bunga kembang sepatu dan bunga rosella dengan pelarut air dan etanol, selain itu dilakukan juga uji stabilitas zat warna. Analisa kadar zat warna dilakukan dengan metode spektr...

  1. Decrease of Plasma Glucose by Hibiscus taiwanensis in Type-1-Like Diabetic Rats

    Science.gov (United States)

    Wang, Lin-Yu; Chung, Hsien-Hui

    2013-01-01

    Hibiscus taiwanensis (Malvaceae) is widely used as an alternative herb to treat disorders in Taiwan. In the present study, it is used to screen the effect on diabetic hyperglycemia in streptozotocin-induced diabetic rats (STZ-diabetic rats). The extract of Hibiscus taiwanensis showed a significant plasma glucose-lowering action in STZ-diabetic rats. Stems of Hibiscus taiwanensis are more effective than other parts to decrease the plasma glucose in a dose-dependent manner. Oral administration of Hibiscus taiwanensis three times daily for 3 days into STZ-diabetic rats increased the sensitivity to exogenous insulin showing an increase in insulin sensitivity. Moreover, similar repeated administration of Hibiscus taiwanensis for 3 days in STZ-diabetic rats produced a marked reduction of phosphoenolpyruvate carboxykinase (PEPCK) expression in liver and an increased expression of glucose transporter subtype 4 (GLUT 4) in skeletal muscle. Taken together, our results suggest that Hibiscus taiwanensis has the ability to lower plasma glucose through an increase in glucose utilization via elevation of skeletal GLUT 4 and decrease of hepatic PEPCK in STZ-diabetic rats. PMID:23690841

  2. Biology of Pink Hibiscus MealybugMaconellicoccushirsutus (Green on Chinese Hibiscus Shrubs in Khuzestan Province

    Directory of Open Access Journals (Sweden)

    M. Sadat Alizadeh

    2017-12-01

    Full Text Available Introduction: The pink hibiscus mealybug, Maconellicoccushirsutus (Green (Hem.:Pseudococcidae is one of the serious economic pests of agricultural crops in tropical and subtropical regions.This pesthas spread through Asia, Africa, America and Australia, and infests more than 330 host plants which some of them have the important role in theeconomy. This sap-feeding insect secrets honeydew which provides suitablemedium for black sooty moldgrowth. It also releases a toxin during feeding, which results in severe stunting, decline, and deformation of twigs. It has recorded as a pest on different host plants in southern Iranian provinces since the 1990s.In Khuzestan province, it was first observed on Chinese hibiscus shrubs in urban landscapes of Ahvaz in February 2009. The evergreen hibiscus shrub is very common in the urban landscape of warmcities of Khuzestan province. The severity of mealybug damage to hibiscus shrubs causedto becut off in some regions. As there is no data on the biology of M. hirsutus in Iran,in the present study, the biologyof this pestwas investigatedat different temperatures in laboratory conditions as well as its population fluctuations on Chinese hibiscus shrubs in urban landscapes of Ahvaz. Materials and methods: Biology of the pest species was evaluated at five laboratory constant temperatures 15, 20, 25, 30and 35±2°C (65±5% RH and a photoperiod of L: D 14:10 h on Chinese hibiscus leaves in plastic boxes (8×6×2 cm. Number ofM. hirsutusgenerations was also studied in clip cages on hibiscus shrubs in Ahvaz urban landscapes within a year. Population fluctuations of the insect were also investigated on those shrubs in two different regions of Ahvaz for 16 months. For this purpose, random sampling was done on five shrubs in each region bi-weekly. Eight twigs, 5 cm in length, were cut from the upper and lower halves of each shrub quadrant and a number of all mealybug developmental stages per twig were counted and recorded

  3. Study of large nonlinear change phase in Hibiscus Sabdariffa

    Science.gov (United States)

    Trejo-Durán, M.; Alvarado-Méndez, E.; Andrade-Lucio, J. A.; Rojas-Laguna, R.; Vázquez-Guevara, M. A.

    2015-09-01

    High intensities electromagnetic energy interacting with organic media gives rise to nonlinear optical effects. Hibiscus Sabdariffa is a flower whose concentrated solution presents interesting nonlinear optical properties. This organic material shows an important self-phase modulation with changes bigger than 2π. We present a diffraction ring patterns study of the Hibiscus Sabdariffa solution. Numerical results of transmittance, with refraction and simultaneous absorption, are shown.

  4. PHARMACOLOGICAL EFFECTS AND THERAPEUTIC PROPERTIES OF HIBISCUS CANNABINUS- A REVIEW

    OpenAIRE

    Ali Esmail Al-Snafi

    2018-01-01

    The phytochemical analysis of Hibiscus cannabinus showed the presence of phytosterols, flavonoids, polyphenols, tannins, steroids, alkaloids, saponins, lignans, essential oils, glucosides such as cannabiscitrin, cannabiscetin and anthocyanin glycoside. The pharmacological studies revealed that Hibiscus cannabinus possessed cytotoxic, anthelmintic, antibacterial, antiulcer, antidiabetic, hypolipidemic, antioxidant, immunological, haematinic and hepatoprotective effects. This review will highli...

  5. Physicochemical and phytochemical properties of cold and hot water extraction from Hibiscus sabdariffa.

    Science.gov (United States)

    Ramirez-Rodrigues, Milena M; Plaza, Maria L; Azeredo, Alberto; Balaban, Murat O; Marshall, Maurice R

    2011-04-01

    Hibiscus cold (25 °C) and hot (90 °C) water extracts were prepared in various time-temperature combinations to determine equivalent extraction conditions regarding their physicochemical and phytochemical properties. Equivalent anthocyanins concentration was obtained at 25 °C for 240 min and 90 °C for 16 min. Total phenolics were better extracted with hot water that also resulted in a higher antioxidant capacity in these extracts. Similar polyphenolic profiles were observed between fresh and dried hibiscus extracts. Hibiscus acid and 2 derivatives were found in all extracts. Hydroxybenzoic acids, caffeoylquinic acids, flavonols, and anthocyanins constituted the polyphenolic compounds identified in hibiscus extracts. Two major anthocyanins were found in both cold and hot extracts: delphynidin-3-sambubioside and cyanidin-3-sambubioside. In general, both cold and hot extractions yielded similar phytochemical properties; however, under cold extraction, color degradation was significantly lower and extraction times were 15-fold longer. Hibiscus beverages are prepared from fresh or dried calyces by a hot extraction and pasteurized, which can change organoleptic, nutritional, and color attributes. Nonthermal technologies such as dense phase carbon dioxide may maintain their fresh-like color, flavor, and nutrients. This research compares the physicochemical and phytochemical changes resulting from a cold and hot extraction of fresh and dried hibiscus calyces and adds to the knowledge of work done on color, quality attributes, and antioxidant capacity of unique tropical products. In addition, the research shows how these changes could lead to alternative nonthermal processes for hibiscus.

  6. Relationships between anthocyanins and other compounds and sensory acceptability of Hibiscus drinks.

    Science.gov (United States)

    Bechoff, Aurélie; Cissé, Mady; Fliedel, Geneviève; Declemy, Anne-Laure; Ayessou, Nicolas; Akissoe, Noel; Touré, Cheikh; Bennett, Ben; Pintado, Manuela; Pallet, Dominique; Tomlins, Keith I

    2014-04-01

    Chemical composition of Hibiscus drinks (Koor and Vimto varieties, commercial and traditional, infusions and syrups) (n=8) was related to sensory evaluation and acceptance. Significant correlations between chemical composition and sensory perception of drinks were found (i.e. anthocyanin content and Hibiscus taste) (pHibiscus drink and anthocyanin content. The study showed that the distinctions between the acceptability groups are very clear with respect to the chemical composition and rating of sensory attributes. Copyright © 2013 Elsevier Ltd. All rights reserved.

  7. The effectiveness of Hibiscus sabdariffa in the treatment of hypertension: a systematic review.

    Science.gov (United States)

    Wahabi, H A; Alansary, L A; Al-Sabban, A H; Glasziuo, P

    2010-02-01

    Hypertension is a common global health problem with significant mortality and morbidity. Hibiscus sabdariffa is a plant known in many countries and is consumed as hot and cold drinks In addition to its use in folk medicine; it has been suggested as treatment for many conditions including hypertension. The objectives of this review were to examine the evidence of effectiveness and safety of hibiscus in the treatment of hypertension. We searched several medical databases (MEDLINE, EMBASE, CINAHL, Cochrane Central Register of Controlled Trials, and the specialized register of the Cochrane Hypertension Group and the general engine Google) to January 2009. We included randomized controlled trials that had examined Hibiscus's effectiveness and safety in the treatment of primary hypertension in adults. Two authors independently selected the trials for the review, extracted the data, and critically appraised the included studies. Four trials, with a total of 390 patients, met our inclusion criteria. Two studies compared Hibiscus sabdariffa to black tea; one study compared it to captopril and one to lisinopril. The studies found that Hibiscus had greater blood pressure reduction than tea but less than the ACE-inhibitors. However, all studies, except one, were short term and of poor quality with a Jadad scoring of Hibiscus sabdariffa for the treatment of primary hypertension in adults. Copyright 2009 Elsevier GmbH. All rights reserved.

  8. In vitro inhibitory activities of the extract of Hibiscus sabdariffa L ...

    African Journals Online (AJOL)

    In vitro inhibitory activities of the extract of Hibiscus sabdariffa L. (family malvaceae) on selected cytochrome p450 isoforms. SS Johnson, FT Oyelola, T Ari, H Juho. Abstract. Literature is scanty on the interaction potential of Hibiscus sabdariffa L., plant extract with other drugs and the affected targets. This study was ...

  9. Radiosensitivity and chimera formation in Hibiscus syriacus

    International Nuclear Information System (INIS)

    Kwon, S.H.; Won, J.L.

    1980-01-01

    Radiosensitivity of gamma-irradiated Hibiscus syriacus and chimera formation were investigated. The lethal dose-50 percent with respect to seeding and cuttings was 15kR and 2 approximately 3 kR respectively, chlorophyll mutation rate of seeds irradiated with 15 kR being about 13 percent. The degree of chimeric leaf mutants from the buds by radiation treatment depends on the bud position of the branch. Buds of the middle part of V 1 branch seemed to be more multi-cellular condition than the upper and low part when irradiation was made. It is assumed that at least two primordia of V 2 branch were already differentiated from the V 1 branch in Hibiscus syriacus plant. (Author)

  10. Electronic Resource Management and Design

    Science.gov (United States)

    Abrams, Kimberly R.

    2015-01-01

    We have now reached a tipping point at which electronic resources comprise more than half of academic library budgets. Because of the increasing work associated with the ever-increasing number of e-resources, there is a trend to distribute work throughout the library even in the presence of an electronic resources department. In 2013, the author…

  11. Sortiment Hibiscus voortdurend in beweging

    NARCIS (Netherlands)

    Hoffman, M.H.A.

    2010-01-01

    Hibiscus is hot en volop in ontwikkeling. Op Plantarium 2009 werden maarliefst acht nieuwe cultivars ter keuring aangeboden. In naamlijsten van 2005 staan ruim 150 cultivars geregistreerd, terwijl dit er in de naamlijst van 1995 slechts 60 waren. Alle reden om op een rijtje te zetten wat er bekend

  12. Breeding of Hibiscus rosa-sinensis for garden use in Denmark

    DEFF Research Database (Denmark)

    Kuligowska, Katarzyna; Simonsen, Maria Boye; Lütken, Henrik Vlk

    2013-01-01

    -sinensis for increased chilling tolerance by conventional breeding is unlikely because there is a lack of genetic information in relation to this trait within this species. In the Hibiscus genus, cold hardiness is available, but only in a few species. Attempts to create cold tolerant Hibiscus plants resembling H. rosa......Hibiscus rosa-sinensis is an ornamental shrub in tropical and subtropical regions. Limitation of its use as an outdoor ornamental plant in a temperate climate is due to chilling sensitivity. Cold hardiness is a highly complex trait, involving multiple genes. Improvement of H. rosa......-sinensis suitable for Nordic climate have not been successful so far. In ornamental breeding wide hybridization is a major source of genetic variation, and can also be a promising approach to introgress cold hardiness in H. rosa-sinensis. The objective of the present study is to evaluate the possibilities...

  13. Functional properties of roselle (Hibiscus sabdariffa L.) seed and its application as bakery product

    OpenAIRE

    Nyam, Kar-Lin; Leao, Sod-Ying; Tan, Chin-Ping; Long, Kamariah

    2012-01-01

    Roselle (Hibiscus sabdariffa L.) seed is a valuable food resource as it has an excellent source of dietary fibre. Therefore, this study examined the functional properties of roselle seeds. Replacement of cookie flour with roselle seed powder at levels of 0–30 % was investigated for its effect on functional and nutritional properties of cookies. Among the four formulations cookies, the most preferred by panelists was 20 % roselle seed powder cookie (F3), followed by 10 % roselle seed powder co...

  14. Potensi Diversifikasi Rosela Herbal (Hibiscus Sabdariffa L.) untuk Pangan dan Kesehatan

    OpenAIRE

    Nurnasari, Elda; Khuluq, Ahmad Dhiaul

    2017-01-01

    Tanaman penghasil serat alami dari genus Hibiscus yang cukup populer di Indonesia adalah rosela (Hibiscus sabdariffa L.). Nilai kemanfaatan rosela sangat luas baik untuk pangan dan kesehatan, sehingga potensi diversifikasi rosela cukup besar. Tujuan penulisan review ini adalah untuk memberikan informasi kandungan fitokimia potensial tanaman rosela herbal yang memiliki efek farmakologis dan fisiologis serta beberapa diversifikasi produk makanan, minuman dan produk kesehatan. Bagian tanaman ro...

  15. In vivo pharmacodynamic and pharmacokinetic interactions of Hibiscus sabdariffa calyces extracts with simvastatin.

    Science.gov (United States)

    Showande, S J; Adegbolagun, O M; Igbinoba, S I; Fakeye, T O

    2017-12-01

    Increasing number of patients use herbs with their medications. Such practice may result in beneficial or harmful herb-drug interactions. A recent survey reported that some participants co-administered Hibiscus sabdariffa, a widely used beverage, or tea, with their antihyperlipidaemic medications. This study therefore evaluated the effect of concomitant administration of Hibiscus sabdariffa calyces' extracts with simvastatin on hyperlipidaemia and pharmacokinetics of the drug in vivo. Factorial experimental designs were used to evaluate the comparative effectiveness and interactions between simvastatin and aqueous extract of Hibiscus sabdariffa (AEHS) on lipid profile parameters in hyperlipidaemia-induced Wistar rats. Different combinations of low (AEHS 250 mg/kg; simvastatin 10 mg/kg) and high doses (AEHS 500 mg/kg; simvastatin 20 mg/kg) were administered individually and concurrently daily for 2 and 4 weeks. Lipid profile parameters were assessed at these treatment periods. Subsequently, the effect of aqueous beverage of Hibiscus sabdariffa (ABHS) on the pharmacokinetics of single-dose 40 mg simvastatin was also evaluated in six healthy human volunteers using two-period randomized crossover design. Blood samples were collected at predetermined times for 24 hours. The plasma obtained was analysed for simvastatin using RP-HPLC/UV method. Aqueous extract of Hibiscus sabdariffa reduced total cholesterol (T c ) better than simvastatin (P = .031). Low-dose AEHS and low-dose simvastatin used concomitantly caused 38.3% and 57.4% reductions in T c and triglyceride levels, respectively, compared with low-dose simvastatin (P Hibiscus sabdariffa lowered T c better than simvastatin and enhanced the antihyperlipidaemic activity of the drug when co-administered at low doses in an animal model. However, aqueous beverage of Hibiscus sabdariffa caused a significant herb-drug interaction resulting in overall reduction in exposure to simvastatin in humans. Caution should

  16. [Therapeutic potential of Hibiscus sabdariffa: a review of the scientific evidence].

    Science.gov (United States)

    Guardiola, Soledad; Mach, Núria

    2014-05-01

    Infusion of Hibiscus sabdariffa (H. sabdariffa) is a very popular drink in many parts of the world. Its phytochemical composition is associated to antioxidant, hypotensive, and antiatherosclerotic effects. However, the molecular mechanisms involved in these processes are not well known. The aim of this review was to report the scientific evidence supporting that regular use of H. sabdariffa decreases oxidative stress, atherosclerosis, lipid profile, and blood pressure. A search of recent publications was made in the following specialized electronic databases: Elsevier Journal, SciELO, FSTA, Science Direct, Springer Link, and NCBI. Results of research conducted in clinical trials in humans and in animal models and cell cultures were recorded. Keywords used included Hibiscus sabdariffa, oxidative stress, polyphenols, hypertension, atherosclerosis, and lipid profile. Results of the different articles suggested a possible therapeutic effect of H. sabdariffa extracts on oxidative stress, lipid profile, hypertension, and atherosclerosis thanks to its composition rich in phenolic compounds. Anthocyanins significantly decrease LDL oxidation, inhibit adipogenesis by regulating adipogenic signaling pathways and transcription factors, and modulate gene expression of certain microRNAs. No adverse events or side effects were reported. Further more homogeneous, placebo-controlled studies in humans are needed to state that H. sabdariffa has therapeutic efficacy in humans. Copyright © 2013 SEEN. Published by Elsevier Espana. All rights reserved.

  17. Hot and cold water infusion aroma profiles of Hibiscus sabdariffa: fresh compared with dried.

    Science.gov (United States)

    Ramírez-Rodrigues, M M; Balaban, M O; Marshall, M R; Rouseff, R L

    2011-03-01

    Calyxes from the Roselle plant (Hibiscus sabdariffa L.) were used to prepare cold (22 °C for 4 h) and hot (98 °C for 16 min) infusions/teas from both fresh and dried forms. Aroma volatiles were extracted using static headspace SPME and analyzed using GC-MS and GC-O with 2 different columns (DB-5 and DB-Wax). Totals of 28, 25, 17, and 16 volatiles were identified using GC-MS in the dried hot extract (DHE), dried cold extract (DCE), fresh hot extract (FHE), and fresh cold extract (FCE) samples, respectively. In terms of total GC-MS peak areas DHE ≫ DCE > FHE ≫ FCE. Nonanal, decanal, octanal, and 1-octen-3-ol were among the major volatiles in all 4 beverage types. Thirteen volatiles were common to all 4 teas. Furfural and 5-methyl furfural were detected only in dried hibiscus beverages whereas linalool and 2-ethyl-1-hexanol were detected only in beverages from fresh hibiscus. In terms of aroma active volatiles, 17, 16, 13, and 10 aroma active volatiles were detected for DHE, DCE, FHE, and FCE samples, respectively. The most intense aroma volatiles were 1-octen-3-one and nonanal with a group of 4 aldehydes and 3 ketones common to all samples. Dried samples contained dramatically higher levels of lipid oxidation products such as hexanal, nonanal, and decanal. In fresh hibiscus extracts, linalool (floral, citrus) and octanal (lemon, citrus) were among the highest intensity aroma compounds but linalool was not detected in any of the dried hibiscus extracts. Hibiscus teas/infusions are one of the highest volume specialty botanical products in international commerce. The beverage is consumed for both sensory pleasure and health attributes and is prepared a number of ways throughout the world. Although color and taste attributes have been examined, little information is known about its aroma volatiles and no other study has compared extractions from both fresh and dried as well as extraction temperature differences. This is also, apparently, the first study to identify

  18. Z-scan and optical limiting properties of Hibiscus Sabdariffa dye

    Science.gov (United States)

    Diallo, A.; Zongo, S.; Mthunzi, P.; Rehman, S.; Alqaradawi, S. Y.; Soboyejo, W.; Maaza, M.

    2014-12-01

    The intensity-dependent refractive index n 2 and the nonlinear susceptibility χ (3) of Hibiscus Sabdariffa dye solutions in the nanosecond regime at 532 nm are reported. More presicely, the variation of n 2, β, and real and imaginary parts of χ (3) versus the natural dye extract concentration has been carried out by z-scan and optical limiting techniques. The third-order nonlinearity of the Hibiscus Sabdariffa dye solutions was found to be dominated by nonlinear refraction, which leads to strong optical limiting of laser.

  19. Can hibiscus tea lower blood pressure

    Science.gov (United States)

    Hibiscus sabdariffa is a common ingredient found in blended herbal teas, and beverages made from the dried calyces of this plant are popular worldwide. In vitro studies have shown that H. sabdariffa has antioxidant properties and, in animal models of hypertension, extracts of this plant lower blood ...

  20. Phytochemical Screening and Antibacterial Activities Of HIBISCUS ...

    African Journals Online (AJOL)

    USER

    Department of Applied Science, College of Science and Technology, ... results showed the presence of tannins, flavonoids, saponins and steroids in the methanolic extract of the leaves of Hibiscus sabdariffa L. The mean zones of inhibition of ...

  1. A cilevirus infects ornamental hibiscus in Hawaii

    Science.gov (United States)

    Melzer, Michael J.; Simbajon, Nelson; Carillo, James; Borth, Wayne B.; Freitas-Astúa, Juliana; Kitajima, Elliot W.; Neupane, Kabi R.; Hu, John S.

    2013-01-01

    The complete nucleotide sequence of a virus infecting ornamental hibiscus (Hibiscus sp.) in Hawaii with symptoms of green ringspots on senescing leaves was determined from double-stranded RNA isolated from symptomatic tissue. Excluding polyadenylated regions at the 3′ termini, the bipartite RNA genome was 8748 and 5019 nt in length for RNA1 and RNA2, respectively. The genome organization was typical of a cilevirus: RNA1 encoded a large replication-associated protein with methyltransferase, protease, helicase and RNA-dependent RNA polymerase domains as well as a 29-kDa protein of unknown function. RNA2 possessed five open reading frames that potentially encoded proteins with molecular masses of 15, 7, 62, 32, and 24 kDa. The 32-kDa protein is homologous to 3A movement proteins of RNA viruses; the other proteins are of unknown function. A proteome comparison revealed that this virus was 92% identical to citrus leprosis virus cytoplasmic type 2 (CiLV-C2), a recently characterized cilevirus infecting citrus with leprosis-like symptoms in Colombia. The high sequence similarity suggests that the virus described in this study could be a strain of CiLV-C2, but since the new genus Cilevirus does not have species demarcation criteria established at present, the classification of this virus infecting hibiscus is open to interpretation. This study represents the first documented case of a cilevirus established in the United States and provides insight into the diversity within the genus Cilevirus. PMID:23732930

  2. A cilevirus infects ornamental hibiscus in Hawaii.

    Science.gov (United States)

    Melzer, Michael J; Simbajon, Nelson; Carillo, James; Borth, Wayne B; Freitas-Astúa, Juliana; Kitajima, Elliot W; Neupane, Kabi R; Hu, John S

    2013-11-01

    The complete nucleotide sequence of a virus infecting ornamental hibiscus (Hibiscus sp.) in Hawaii with symptoms of green ringspots on senescing leaves was determined from double-stranded RNA isolated from symptomatic tissue. Excluding polyadenylated regions at the 3' termini, the bipartite RNA genome was 8748 and 5019 nt in length for RNA1 and RNA2, respectively. The genome organization was typical of a cilevirus: RNA1 encoded a large replication-associated protein with methyltransferase, protease, helicase and RNA-dependent RNA polymerase domains as well as a 29-kDa protein of unknown function. RNA2 possessed five open reading frames that potentially encoded proteins with molecular masses of 15, 7, 62, 32, and 24 kDa. The 32-kDa protein is homologous to 3A movement proteins of RNA viruses; the other proteins are of unknown function. A proteome comparison revealed that this virus was 92 % identical to citrus leprosis virus cytoplasmic type 2 (CiLV-C2), a recently characterized cilevirus infecting citrus with leprosis-like symptoms in Colombia. The high sequence similarity suggests that the virus described in this study could be a strain of CiLV-C2, but since the new genus Cilevirus does not have species demarcation criteria established at present, the classification of this virus infecting hibiscus is open to interpretation. This study represents the first documented case of a cilevirus established in the United States and provides insight into the diversity within the genus Cilevirus.

  3. Interspecific hybridization among cultivars of hardy Hibiscus species section Muenchhusia

    DEFF Research Database (Denmark)

    Kuligowska, Katarzyna; Lütken, Henrik Vlk; Christensen, Brian

    2016-01-01

    Rose mallows belong to the Muenchhusia section of the Hibiscus genus. They represent a small group of cold tolerant North American plants and are popular ornamentals mainly because of their abundant, large and colorful flowers. Due to their geographical origin they are well suited for garden use...... in temperate regions worldwide. The aim of the study was to investigate hybridization barriers in crosses among cultivars of Hibiscus species from the Muenchhusia section: H. coccineus, H. laevis and H. moscheutos. Crossing barriers were identified as both pre- and post-zygotic. The analysis of pollen tube...

  4. Hibiscus sabdariffa L., roselle calyx, from ethnobotany to pharmacology.

    Science.gov (United States)

    Carvajal-Zarrabal, Octavio; Barradas-Dermitz, Dulce María; Orta-Flores, Zaida; Hayward-Jones, Patricia Margaret; Nolasco-Hipólito, Cirilo; Aguilar-Uscanga, M Guadalupe; Miranda-Medina, Anilú; Bujang, Kopli Bin

    2012-01-01

    Using MEDLINE and SCOPUS databases, a review of the literature from the pioneering study of 1991 until 2010 was performed on the effects on biological models of Hibiscus sabdariffa L. roselle calyx, its extracts mainly in polar solvents, or pure components found in extracts, as well as their possible relationship to these effects. Three relevant effects on lipid metabolism, antihypertensive activity, and apoptosis were observed. Our chronological review of the studies mentioned in the literature provides another opportunity to see how humans compile scientific knowledge of a chemical structure-physiological activity relationship starting from an ethnobotanical-ethnopharmagognosy contribution. The chemical components that are the main active principles in the physiological activities of Hibiscus sabdariffa L. calyx are anthocyanins and polyphenols (protocatechuic acid and quercetin). Advances have also been made in the elucidation of action mechanisms. Additionally, it has become clear that the lack of standardization in terms of chemical components of the material arising from Hibiscus sabdariffa L. used in testing on biological models imposes limits on the possibility of carrying out comparative analyses between studies. Fortunately, more recent studies are overcoming this obstacle by reporting component concentrations of assumed active principles; however, complete analysis of the extract, if this is to be considered as a therapeutic agent, is not commonly reported in the aforesaid studies. If one of the eventual scenarios for Hibiscus sabdariffa L. calyx is as a therapeutic agent in communities with economic limitations, then studies of a pharmacological nature should guarantee the effectiveness, safety, and tolerability of this material, which is widely accepted to be associated with chemical complexity, thus making this knowledge necessary.

  5. Hibiscus sabdariffa L., roselle calyx, from ethnobotany to pharmacology

    Science.gov (United States)

    Carvajal-Zarrabal, Octavio; Barradas-Dermitz, Dulce María; Orta-Flores, Zaida; Hayward-Jones, Patricia Margaret; Nolasco-Hipólito, Cirilo; Aguilar-Uscanga, M Guadalupe; Miranda-Medina, Anilú; Bujang, Kopli Bin

    2012-01-01

    Using MEDLINE and SCOPUS databases, a review of the literature from the pioneering study of 1991 until 2010 was performed on the effects on biological models of Hibiscus sabdariffa L. roselle calyx, its extracts mainly in polar solvents, or pure components found in extracts, as well as their possible relationship to these effects. Three relevant effects on lipid metabolism, antihypertensive activity, and apoptosis were observed. Our chronological review of the studies mentioned in the literature provides another opportunity to see how humans compile scientific knowledge of a chemical structure–physiological activity relationship starting from an ethnobotanical–ethnopharmagognosy contribution. The chemical components that are the main active principles in the physiological activities of Hibiscus sabdariffa L. calyx are anthocyanins and polyphenols (protocatechuic acid and quercetin). Advances have also been made in the elucidation of action mechanisms. Additionally, it has become clear that the lack of standardization in terms of chemical components of the material arising from Hibiscus sabdariffa L. used in testing on biological models imposes limits on the possibility of carrying out comparative analyses between studies. Fortunately, more recent studies are overcoming this obstacle by reporting component concentrations of assumed active principles; however, complete analysis of the extract, if this is to be considered as a therapeutic agent, is not commonly reported in the aforesaid studies. If one of the eventual scenarios for Hibiscus sabdariffa L. calyx is as a therapeutic agent in communities with economic limitations, then studies of a pharmacological nature should guarantee the effectiveness, safety, and tolerability of this material, which is widely accepted to be associated with chemical complexity, thus making this knowledge necessary. PMID:27186114

  6. Assessment of oil content and fatty acid composition variability in two economically important Hibiscus species.

    Science.gov (United States)

    Wang, Ming Li; Morris, Brad; Tonnis, Brandon; Davis, Jerry; Pederson, Gary A

    2012-07-04

    The Hibiscus genus encompasses more than 300 species, but kenaf (Hibiscus cannabinus L.) and roselle (Hibiscus sabdariffa L.) are the two most economically important species within the genus. Seeds from these two Hibiscus species contain a relatively high amount of oil with two unusual fatty acids: dihydrosterculic and vernolic acids. The fatty acid composition in the oil can directly affect oil quality and its utilization. However, the variability in oil content and fatty acid composition for these two species is unclear. For these two species, 329 available accessions were acquired from the USDA germplasm collection. Their oil content and fatty acid composition were determined by nuclear magnetic resonance (NMR) and gas chromatography (GC), respectively. Using NMR and GC analyses, we found that Hibiscus seeds on average contained 18% oil and seed oil was composed of six major fatty acids (each >1%) and seven minor fatty acids (each Hibiscus cannabinus seeds contained significantly higher amounts of oil (18.14%), palmitic (20.75%), oleic (28.91%), vernolic acids (VA, 4.16%), and significantly lower amounts of stearic (3.96%), linoleic (39.49%), and dihydrosterculic acids (DHSA, 1.08%) than H. sabdariffa seeds (17.35%, 18.52%, 25.16%, 3.52%, 4.31%, 44.72%, and 1.57%, respectively). For edible oils, a higher oleic/linoleic (O/L) ratio and lower level of DHSA are preferred, and for industrial oils a high level of VA is preferred. Our results indicate that seeds from H. cannabinus may be of higher quality than H. sabdariffa seeds for these reasons. Significant variability in oil content and major fatty acids was also detected within both species. The variability in oil content and fatty acid composition revealed from this study will be useful for exploring seed utilization and developing new cultivars in these Hibiscus species.

  7. JST Thesaurus Headwords and Synonyms: Hibiscus [MeCab user dictionary for science technology term[Archive

    Lifescience Database Archive (English)

    Full Text Available MeCab user dictionary for science technology term Hibiscus 名詞 一般 * * * * フヨウ属 フヨウゾク フヨーゾク Thesaurus2015 200906098519206796 C LS06 UNKNOWN_1 Hibiscus

  8. Phytochemical Screening and Antibacterial Activities of Hibiscus ...

    African Journals Online (AJOL)

    The phytochemical properties and the antibacterial potency of rosselle (Hibiscus sabdariffa L) leaf extracts were evaluated using the cold maceration method, agar diffusion method and qualitative phytochemical analysis respectively. The methanolic extract was tested against Salmonella typhi, Escherichia coli and ...

  9. Inheritance of characters in kenaf (Hibiscus cannabinus)

    African Journals Online (AJOL)

    SERVER

    2008-04-03

    David and Adam, 1988). The plant belongs to the order Malvales, the family Malvaceae and the genus Hibiscus ... The varieties in relation to the character studied are as follows: NRG-NG-R5: Pink flowers with resistance to root ...

  10. Hibiscus sabdariffa L. tea (tisane) lowers blood pressure in prehypertensive and mildly hypertensive adults.

    Science.gov (United States)

    McKay, Diane L; Chen, C-Y Oliver; Saltzman, Edward; Blumberg, Jeffrey B

    2010-02-01

    In vitro studies show Hibiscus sabdariffa L., an ingredient found in many herbal tea blends and other beverages, has antioxidant properties, and, in animal models, extracts of its calyces have demonstrated hypocholesterolemic and antihypertensive properties. Our objective in this study was to examine the antihypertensive effects of H. sabdariffa tisane (hibiscus tea) consumption in humans. A randomized, double-blind, placebo-controlled clinical trial was conducted in 65 pre- and mildly hypertensive adults, age 30-70 y, not taking blood pressure (BP)-lowering medications, with either 3 240-mL servings/d of brewed hibiscus tea or placebo beverage for 6 wk. A standardized method was used to measure BP at baseline and weekly intervals. At 6 wk, hibiscus tea lowered systolic BP (SBP) compared with placebo (-7.2 +/- 11.4 vs. -1.3 +/- 10.0 mm Hg; P = 0.030). Diastolic BP was also lower, although this change did not differ from placebo (-3.1 +/- 7.0 vs. -0.5 +/- 7.5 mm Hg; P = 0.160). The change in mean arterial pressure was of borderline significance compared with placebo (-4.5 +/- 7.7 vs. -0.8 +/- 7.4 mm Hg; P = 0.054). Participants with higher SBP at baseline showed a greater response to hibiscus treatment (r = -0.421 for SBP change; P = 0.010). No effects were observed with regard to age, gender, or dietary supplement use. These results suggest daily consumption of hibiscus tea, in an amount readily incorporated into the diet, lowers BP in pre- and mildly hypertensive adults and may prove an effective component of the dietary changes recommended for people with these conditions.

  11. Analgesic activity of Hibiscus rosa sinensis Linn in rat

    Directory of Open Access Journals (Sweden)

    Alka Sawarkar

    Full Text Available The plant Hibiscus rosa  sinensis Linn. belongs to family “Malvacecae” and Considering various medicinal properties of this plant, the leaves were collected and studied for Extractability percentage, analgesic. The herb Hibiscus rosa  sinensis  belonging to the family “Malvacecae” and is commonly known as jasvand. It is cultivated in garden throughout India native country probably china. The buds have a sweet odour and bitter taste, cooling, astringent, remove burning sensations of the body and relieve pain. In the present study aqueous, alcoholic Extracts of dried leaves of Hibiscus rosasinensis was prepared. The extractability percentage of leaves was 20%. The extract showed marked analgesic activity in a dose dependent manner. Aqueous and alcoholic extracts produced significant results at both doses (P<0.01, the findings indicated the analgesic activity of the leaves of the plant. [Vet World 2009; 2(9.000: 353-354

  12. Studies on the antifertility potentiality of Hibiscus rosa sinensis. Parts of medicinal value; selection of species and seasonal variations.

    Science.gov (United States)

    Kholkute, S D; Mudgal, V; Udupa, K N

    1977-02-01

    The postcoital antifertility properties of benzene hot extracts of Hibiscus rosa sinensis flowers, leaves, and stembarks, collected during the winter, spring, rainy, and summer seasons, were investigated in female rats. Only extracts from the flowers of the plant were 100% effective in preventing pregnancy. Those flowers collected during the winter showed the greatest potency, followed by those collected in the spring, rainy season, and summer, in decreasing order. Benzene extracts of flowers collected from Hibiscus mutabilis, Hibiscus schizopetalus, and Malvasicus grandiflorus, plants resembling Hibiscus rosa sinensis in petaloid structure, did not markedly affect pregnancy.

  13. Identifying salt stress-responsive transcripts from Roselle ( Hibiscus ...

    African Journals Online (AJOL)

    Hibiscus sabdariffa L.). Identifying the potentially novel transcripts responsible for salt stress tolerance in roselle will increase knowledge of the molecular mechanism underlying salt stress responses. In this study, differential display reverse ...

  14. Compostos químicos e atividade antioxidante analisados em Hibiscus rosa-sinensis L. (mimo-de-vênus) e Hibiscus syriacus L. (hibisco-da-síria)

    OpenAIRE

    Silva, Analú Barbosa da; Wiest, José Maria; Carvalho, Heloisa Helena Chaves

    2016-01-01

    Resumo O Hibiscus rosa-sinensis L. e o Hibiscus syriacus L., da família Malvaceae, são utilizados na área ornamental e gastronômica internacional, mas, nos últimos anos, vêm ganhando espaço como flores comestíveis não convencionais na alimentação alternativa. Este estudo objetivou quantificar a composição centesimal, pectina e compostos fitoquímicos dessas variedades de hibisco comparados com o potencial antioxidante detectado. As amostras das flores foram coletadas em uma propriedade agroeco...

  15. JST Thesaurus Headwords and Synonyms: Hibiscus cannabinus [MeCab user dictionary for science technology term[Archive

    Lifescience Database Archive (English)

    Full Text Available MeCab user dictionary for science technology term Hibiscus cannabinus 名詞 一般 * * * *... ケナフ ケナフ ケナフ Thesaurus2015 200906017528823668 C LS06 UNKNOWN_2 Hibiscus cannabinus

  16. INDIKATOR TITRASI ASAM-BASA DARI EKSTRAK BUNGA SEPATU (Hibiscus rosa sinensis L Indicator of Acid-Base Titration from the Extract of Hibiscus rosa sinensis L Flower

    Directory of Open Access Journals (Sweden)

    Siti Nuryanti

    2012-05-01

    Full Text Available Titration acid-base needs indicator  to show the change of color on interval of hydrogen exponent/degree of acid (pH. Indicator of synthetic which always be used have disadvantages like chemical pollution,  stock and expensive of pro- duction  cost. The research has been carried out to substitute the synthetic indicator with herbal indicator extracted from flower crown of Hibiscus rosa sinensis L extract. The herbal indicator was extracted from the flower crown Hibiscus rosa sinensis L using a mixture methanol-acetic acid. Then it was evaluated with phenolphthalein and methyl orange(E merck comparer to titration the acid-base, they are strong acid-strong base, weak base-strong acid and weak acid-strong base. The result of research show that herbal indicator  of flower crown Hibiscus rosa sinensis L to show theequivalent point in all titrations give peer result with the comparison. With the research result hoped that indicatortitration acid-base flower crown Hibiscus rosa sinensis L is able to as replace synthetic indicator  (metyl orange andphenolphtalein which always be used before. ABSTRAK Titrasi asam-basa memerlukan indikator untuk menunjukkan perubahan warna pada setiap interval derajad keasaman (pH. Indikator sintetis yang digunakan selama ini mempunyai beberapa kelemahan seperti polusi kimia, ketersediaan dan biaya produksi mahal. Upaya penelitian sudah dilakukan untuk menggantikan indikator sintetis dengan indikator dari ekstrak mahkota bunga sepatu. Indikator herbal tersebut dibuat dengan cara mengekstrak mahkota bunga Hibiscus rosa sinensis L dengan mengunakan pelarut metanol-asam asetat. Kemudian dievaluasi dengan indikator pembanding fenolftalein dan metil oranye (produksi E merck untuk titrasi asam-basa yaitu asam kuat-basa kuat, basa lemah-asam kuat dan asam lemah-basa kuat. Dari hasil penelitian diketahui bahwa indikator dari mahkota bunga sepatu untuk menunjukkan titik ekivalen dalam titrasi tersebut memberikan hasil yang

  17. Hibiscus vitifolius (Linn.) root extracts shows potent protective action against anti-tubercular drug induced hepatotoxicity.

    Science.gov (United States)

    Samuel, Anbu Jeba Sunilson John; Mohan, Syam; Chellappan, Dinesh Kumar; Kalusalingam, Anandarajagopal; Ariamuthu, Saraswathi

    2012-05-07

    The roots of Hibiscus vitifolius Linn. (Malvaceae) is used for the treatment of jaundice in the folklore system of medicine in India. This study is an attempt to evaluate the hepatoprotective activity of the roots of Hibiscus vitifolius against anti-tubercular drug induced hepatotoxicity. Hepatotoxicity was induced in albino rats of either sex by oral administration of a combination of three anti-tubercular drugs. Petroleum ether, chloroform, methanol and aqueous extracts of roots of Hibiscus vitifolius (400mg/kg/day) were evaluated for their possible hepatoprotective potential. All the extracts were found to be safe up to a dose of 2000mg/kg. Among the four extracts studied, oral administration of methanol extract of Hibiscus vitifolius at 400mg/kg showed significant difference in all the parameters when compared to control. There was a significant (PHibiscus vitifolius have potent hepatoprotective activity, thereby justifying its ethnopharmacological claim. Copyright © 2012 Elsevier Ireland Ltd. All rights reserved.

  18. Hibiscus syriacus Extract from an Established Cell Culture Stimulates Skin Wound Healing

    OpenAIRE

    di Martino, O.; Tito, A.; De Lucia, A.; Cimmino, A.; Cicotti, F.; Apone, F.; Colucci, G.; Calabrò, V.

    2017-01-01

    Higher plants are the source of a wide array of bioactive compounds that support skin integrity and health. Hibiscus syriacus, family Malvaceae, is a plant of Chinese origin known for its antipyretic, anthelmintic, and antifungal properties. The aim of this study was to assess the healing and hydration properties of H. syriacus ethanolic extract (HSEE). We established a cell culture from Hibiscus syriacus leaves and obtained an ethanol soluble extract from cultured cells. The properties of th...

  19. The Hibiscus panduriformis complex (Malvaceae) in Australia

    NARCIS (Netherlands)

    Juswara, L.S.; Craven, L.A.

    2005-01-01

    The Hibiscus panduriformis Burm.f. species complex in Australia is revised. Six species are recognised, of which one is the widespread H. panduriformis; one, H. austrinus, is based upon H. panduriformis var. australis; and four represent new species, H. apodus, H. calcicola, H. fluvialis, and H.

  20. Protocols for Callus and Somatic Embryo Initiation for Hibiscus sabdariffa L. (Malvaceae): Influence of Explant Type, Sugar, and Plant Growth Regulators

    Science.gov (United States)

    A significant work on callus induction and somatic embryogenesis was realized for Hibiscus sabdariffa. Two genotypes (Hibiscus sabdariffa and Hibiscus sabdariffa var. altissima) two sugars (sucrose and glucose) and three concentrations (1 %, 2%, 3%) of each sugar, 3 explant types (root, hypocotyl, c...

  1. Analysis of MINT hibiscus rosa-sinensis mutants

    International Nuclear Information System (INIS)

    Shakinah Salleh; Shuhaimi Shamsudin; Putri Noor Faizah MM Tahir; Mohd Nazir Basiran

    2006-01-01

    Gamma irradiation is an alternative method to create new cultivars of Hibiscus rosa-sinensis in Malaysia. Increasing gamma ray doses resulted in a reduction of growing shoots on the irradiated stem cuttings. The LD50 for the stem cuttings was 36.2 Gy and at 75% growth was 17.15 Gy. Based on these results, 20 to 30 Gy were chosen for irradiation of the stem cuttings to induce mutation in Hibiscus rosa-sinensis. Irradiated stem cuttings were then planted into sand-beds for rooting. After one month, the rooted stems were transferred into polybags and allowed to grow under 70% shade provided by plastic netting and the variants were subsequently observed. Three new cultivars with variations in flower size and colours were obtained. The plants were propagated for five generations to achieve the stable mutants. Anthocyanins analysis is being carried out to measure the amount of anthocyanins in each cultivar. Pelargonidin chloride, Cyanidin chloride and Delphinidin chloride are used as standards for the analysis. (Author)

  2. Electronic Resource Management Systems

    Directory of Open Access Journals (Sweden)

    Mark Ellingsen

    2004-10-01

    Full Text Available Computer applications which deal with electronic resource management (ERM are quite a recent development. They have grown out of the need to manage the burgeoning number of electronic resources particularly electronic journals. Typically, in the early years of e-journal acquisition, library staff provided an easy means of accessing these journals by providing an alphabetical list on a web page. Some went as far as categorising the e-journals by subject and then grouping the journals either on a single web page or by using multiple pages. It didn't take long before it was recognised that it would be more efficient to dynamically generate the pages from a database rather than to continually edit the pages manually. Of course, once the descriptive metadata for an electronic journal was held within a database the next logical step was to provide administrative forms whereby that metadata could be manipulated. This in turn led to demands for incorporating more information and more functionality into the developing application.

  3. The Aqueous Calyx Extract of Hibiscus sabdariffa Lowers Blood ...

    African Journals Online (AJOL)

    olayemitoyin

    Pressure and Heart Rate via Sympathetic Nervous System. Dependent ... discharge of the sympathetic nervous system. Keywords: Hibiscus ... The constituents of HS include protein, fat, ... Talata Mafara central market, Zamfara state, Nigeria.

  4. Electronic Resources Management Project Presentation 2012

    KAUST Repository

    Ramli, Rindra M.

    2012-11-05

    This presentation describes the electronic resources management project undertaken by the KAUST library. The objectives of this project is to migrate information from MS Sharepoint to Millennium ERM module. One of the advantages of this migration is to consolidate all electronic resources into a single and centralized location. This would allow for better information sharing among library staff.

  5. Preliminary characterization of residual biomass from Hibiscus ...

    African Journals Online (AJOL)

    Hibiscus sabdariffa calyces are mainly used for different agro-food and beverages applications. The residual biomass generated contains various useful substances that were extracted and characterized. It contained 23% (w/w) soluble pectic material, a food additive, extracted with hot acidified water (80°C, pH = 1.5) and ...

  6. Detection of somaclonal variation in micropropagated Hibiscus ...

    African Journals Online (AJOL)

    The main objective of micropropagation is to produce clones i.e. plants which are phenotypically and genetically identical to the mother plants. The culture of organized meristems usually guarantees the production of true-to-type plants but variations in the progenies have been widely reported. Hibiscus sabdariffa L. plants ...

  7. Aqueous extract of Hibiscus sabdarrifa calyx alleviates anemia and ...

    African Journals Online (AJOL)

    Aqueous extract of Hibiscus sabdarrifa calyx alleviates anemia and organ damage in Trypanosoma brucei brucei infected rats. IA Umar, E Daikwo, NG Maryoms, A Gidado, LB Buratai, FS Saka, MA Ibrahim ...

  8. Bioremediation of textile effluent polluted soil using kenaf ( Hibiscus ...

    African Journals Online (AJOL)

    Bioremediation of textile effluent polluted soil using kenaf ( Hibiscus cannabinus Linn.) and composted ... Journal of Applied Sciences and Environmental Management. Journal Home ... Twelve-litre plastic pots were filled with 10 kg soil.

  9. The Effects of Cold Stress on Photosynthesis in Hibiscus Plants

    Science.gov (United States)

    Paredes, Miriam; Quiles, María José

    2015-01-01

    The present work studies the effects of cold on photosynthesis, as well as the involvement in the chilling stress of chlororespiratory enzymes and ferredoxin-mediated cyclic electron flow, in illuminated plants of Hibiscus rosa-sinensis. Plants were sensitive to cold stress, as indicated by a reduction in the photochemistry efficiency of PSII and in the capacity for electron transport. However, the susceptibility of leaves to cold may be modified by root temperature. When the stem, but not roots, was chilled, the quantum yield of PSII and the relative electron transport rates were much lower than when the whole plant, root and stem, was chilled at 10°C. Additionally, when the whole plant was cooled, both the activity of electron donation by NADPH and ferredoxin to plastoquinone and the amount of PGR5 polypeptide, an essential component of the cyclic electron flow around PSI, increased, suggesting that in these conditions cyclic electron flow helps protect photosystems. However, when the stem, but not the root, was cooled cyclic electron flow did not increase and PSII was damaged as a result of insufficient dissipation of the excess light energy. In contrast, the chlororespiratory enzymes (NDH complex and PTOX) remained similar to control when the whole plant was cooled, but increased when only the stem was cooled, suggesting the involvement of chlororespiration in the response to chilling stress when other pathways, such as cyclic electron flow around PSI, are insufficient to protect PSII. PMID:26360248

  10. Investigation on the phytosanitary status of major ornamental hibiscus species in Italy to assess virus infection

    Science.gov (United States)

    The genus Hibiscus (family Malvaceae) includes more than 250 species that vary from annual to perennial herbs, and shrubs to small trees that are native to tropical, sub-tropical and temperate climates. A study in 2010-2011 examined viruses associated with symptoms observed on hibiscus plants in It...

  11. Diuretic effect of compounds from Hibiscus sabdariffa by modulation of the aldosterone activity.

    Science.gov (United States)

    Jiménez-Ferrer, Enrique; Alarcón-Alonso, Javier; Aguilar-Rojas, Arturo; Zamilpa, Alejandro; Jiménez-Ferrer C, Itzia; Tortoriello, Jaime; Herrera-Ruiz, Maribel

    2012-12-01

    Recent studies of Hibiscus sabdariffa Linn. have demonstrated that it presents diuretic, natriuretic, and potassium sparing effects. However, the mechanism that induces these effects has not yet been elucidated. The aim of this study was to explore the possible mechanism of action for the diuretic effect of Hibiscus sabdariffa extract and its fractions.The aqueous extract from this plant and the fractions obtained with solvents of different polarities were administered to adrenalectomized rats, and the diuretic effect was measured in the presence of deoxycorticosterone acetate (aldosterone analog).The effect on renal filtration was also evaluated in an in situ kidney model, and finally, the effect of diuretic active extracts on gene expression of the alpha subunit from the transporter (αENaC) of renal epithelial cell was quantified. The subsequent results were obtained: The aqueous extract of Hibiscus sabdariffa presented the following chemical composition, 32.4 mg/g delphinidin-3-O-sambubioside, 11.5 mg/g cyanidin-3-O-sambubioside, 11.5 mg/g quercetin, and chlorogenic acid 2.7 mg/g. The concentration of anthocyanins was diminished until disappearance due to decrease of the polarity of the solvents used in the extraction process, in contrast to the flavonoids and chlorogenic acid, which had their concentration increased. The diuretic effect caused by adrenalectomy in rats was reversed by deoxycorticosterone acetate activity. However, the effect of deoxycorticosterone acetate was antagonized by spironolactone, the aqueous extract of Hibiscus sabdariffa, and the acetonitrile : methanol 5 : 5 mixture extract, administered orally. A similar effect was observed on renal filtration obtained from the isolated kidney model.When the gene expression levels of αENaC was measured in adrenalectomized rats, it was observed that spironolactone, the aqueous extract of Hibiscus sabdariffa, the acetonitrile : methanol 5 : 5 mixture, as well as the

  12. PRINCIPLES OF CONTENT FORMATION EDUCATIONAL ELECTRONIC RESOURCE

    Directory of Open Access Journals (Sweden)

    О Ю Заславская

    2017-12-01

    Full Text Available The article considers modern possibilities of information and communication technologies for the design of electronic educational resources. The conceptual basis of the open educational multimedia system is based on the modular architecture of the electronic educational resource. The content of the electronic training module can be implemented in several versions of the modules: obtaining information, practical exercises, control. The regularities in the teaching process in modern pedagogical theory are considered: general and specific, and the principles for the formation of the content of instruction at different levels are defined, based on the formulated regularities. On the basis of the analysis, the principles of the formation of the electronic educational resource are determined, taking into account the general and didactic patterns of teaching.As principles of the formation of educational material for obtaining information for the electronic educational resource, the article considers: the principle of methodological orientation, the principle of general scientific orientation, the principle of systemic nature, the principle of fundamentalization, the principle of accounting intersubject communications, the principle of minimization. The principles of the formation of the electronic training module of practical studies in the article include: the principle of systematic and dose based consistency, the principle of rational use of study time, the principle of accessibility. The principles of the formation of the module for monitoring the electronic educational resource can be: the principle of the operationalization of goals, the principle of unified identification diagnosis.

  13. High antiviral effects of hibiscus tea extract on the H5 subtypes of low and highly pathogenic avian influenza viruses.

    Science.gov (United States)

    Baatartsogt, Tugsbaatar; Bui, Vuong N; Trinh, Dai Q; Yamaguchi, Emi; Gronsang, Dulyatad; Thampaisarn, Rapeewan; Ogawa, Haruko; Imai, Kunitoshi

    2016-10-01

    Viral neuraminidase inhibitors are widely used as synthetic anti-influenza drugs for the prevention and treatment of influenza. However, drug-resistant influenza A virus variants, including H5N1 highly pathogenic avian influenza viruses (HPAIVs), have been reported. Therefore, the discovery of novel and effective antiviral agents is warranted. We screened the antiviral effects of 11 herbal tea extracts (hibiscus, black tea, tencha, rosehip tea, burdock tea, green tea, jasmine tea, ginger tea, lavender tea, rose tea and oak tea) against the H5N1 HPAIV in vitro. Among the tested extracts, only the hibiscus extract and its fractionated extract (frHibis) highly and rapidly reduced the titers of all H5 HPAIVs and low pathogenic AIVs (LPAIVs) used in the pre-treatment tests of Madin-Darby canine kidney (MDCK) cells that were inoculated with a mixture of the virus and the extract. Immunogold electron microscopy showed that anti-H5 monoclonal antibodies could not bind to the deformed H5 virus particles pretreated with frHibis. In post-treatment tests of MDCK cells cultured in the presence of frHibis after infection with H5N1 HPAIV, the frHibis inhibited viral replication and the expression of viral antigens and genes. Among the plants tested, hibiscus showed the most prominent antiviral effects against both H5 HPAIV and LPAIV.

  14. Hepatoprotective and Antioxidant Effect of Hibiscus Polyphenol Rich Extract (HPE) Against Carbon Tetrachloride (CCL4) - Induced Damage in Rats

    OpenAIRE

    Adetutu, Adewale; Owoade, Abiodun O.

    2013-01-01

    Aims: Hibiscus sabdariffa is a medicinal plant that is consumed for its health benefits in Africa. The study was designed to investigate the hepatoprotective potentials of Hibiscus polyphenolic rich extract (HPE), (a group of phenolic compounds occurring in the dried calyx of Hibiscus sabdariffa) against CCl4-induced damaged in rats. Place and Duration of Study: Department of Biochemistry, Ladoke Akintola University of Technology, Ogbomosho, Nigeria, between January 2011 and June 2012. Method...

  15. Bioremediation of textile effluent polluted soil using kenaf (Hibiscus ...

    African Journals Online (AJOL)

    DR BADA

    Bioremediation of textile effluent polluted soil using kenaf (Hibiscus cannabinus Linn.) and composted ... Lead, Cadmium, Chromium and Zinc levels in plants and soil were determined using Atomic ..... Contaminated land in the EC: Report of ...

  16. Implementing CORAL: An Electronic Resource Management System

    Science.gov (United States)

    Whitfield, Sharon

    2011-01-01

    A 2010 electronic resource management survey conducted by Maria Collins of North Carolina State University and Jill E. Grogg of University of Alabama Libraries found that the top six electronic resources management priorities included workflow management, communications management, license management, statistics management, administrative…

  17. Protective influence of Hibiscus sabdariffa , an edible medicinal ...

    African Journals Online (AJOL)

    The present study was undertaken to examine the protective influence of the alcoholic leaf extract of Hibiscus sabdariffa (Linn) Malvaceae (an indigenous edible medicinal plant used in Ayurvedic and traditional Medicine in India, China and Thailand) on oxidative stress during ammonium chloride induced ...

  18. Oppression and Revolt in Chimamanda Adichie's Purple Hibiscus ...

    African Journals Online (AJOL)

    This paper examines the oppressive practice of Chimamanda Adichie's character – Eugene in Purple Hibiscus on members of his nuclear family. This oppression endangers normal familial relationship as the oppressed view their oppression as an infringement on their fundamental human rights. Therefore, they express ...

  19. Microbial contaminants of cultured Hibiscus cannabinus and Telfaria ...

    African Journals Online (AJOL)

    Nine microbial contaminants comprising of five bacteria and four fungi species were isolated from Hibiscus cannabinus and Telfaria occidentalis cultured tissues. The rate of occurrence of bacteria isolates was higher than that of fungi. The bacterial isolates includes Pseudomonas syringae pv phaseolicoli, Bacillus ...

  20. Managing electronic resources a LITA guide

    CERN Document Server

    Weir, Ryan O

    2012-01-01

    Informative, useful, current, Managing Electronic Resources: A LITA Guide shows how to successfully manage time, resources, and relationships with vendors and staff to ensure personal, professional, and institutional success.

  1. Phytochemical, sensory attributes and aroma stability of dense phase carbon dioxide processed Hibiscus sabdariffa beverage during storage.

    Science.gov (United States)

    Ramírez-Rodrigues, Milena M; Plaza, Maria L; Azeredo, Alberto; Balaban, Murat O; Marshall, Maurice R

    2012-10-01

    The effect of dense phase carbon dioxide (DPCD) processing (34.5 MPa, 8% CO₂, 6.5 min, and 40 °C) on phytochemical, sensory and aroma compounds of hibiscus beverage was compared to a conventional thermal process (HTST) (75 °C for 15 s) and a control (untreated beverage) during refrigerated storage (4 °C). The overall likeability of the hibiscus beverage for all treatments was not affected by storage up to week 5. DPCD process retained more aroma volatiles as compared to HTST. Aroma profiles in the beverages were mainly composed of alcohols and aldehydes with 1-octen-3-ol, decanal, octanal, 1-hexanol, and nonanal as the compounds with the highest relative percentage peak areas. A loss of only 9% anthocyanins was observed for the DPCD processed hibiscus beverage. Phytochemical profiles in the hibiscus beverage included caffeoylquinic acids, anthocyanins, and flavonols. No major changes in total phenolics and antioxidant capacity occurred during the 14 weeks of storage. Copyright © 2012 Elsevier Ltd. All rights reserved.

  2. Studies on the constituents of hibiscus rosa-sinensis

    International Nuclear Information System (INIS)

    Hossain, M.A.; Tarafdar, S.A.

    2003-01-01

    A new flavone derivative, furano flavone (1) was isolated along with ovalichalcone (2) from the leaves and stems of Hibiscus rosa-sinensis (Malvaceae). The structure of furanoflavone (1) was identified as 5-methoxy-3' methyl-3', 4'-methylenedioxyfurano(2,3; 7,8) flavone by spectroscopic and chemical analysis. (author)

  3. Chemical evaluation of three varieties of Roselle ( Hibiscus ...

    African Journals Online (AJOL)

    Chemical evaluation of three varieties of Roselle ( Hibiscus Sabdariffa L.) seeds. SO Babalola, OC Oworh, KO Alasiri, JA Adetunji. Abstract. No Abstract. Nigerian Journal of Horticultural Science Vol. 11 () 2006: pp.31-35. Full Text: EMAIL FULL TEXT EMAIL FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT.

  4. Haematinic activity of Hibiscus Cannabinus | Agbor | African Journal ...

    African Journals Online (AJOL)

    The haematinic activity of an orally administered aqueous extract of Hibiscus cannabinus leaves was studied on haemolytic anaemic rats. Anaemia was induced by an oral administration of phenylhydrazine for a period of 8 days. Red blood cell count, haemoglobin concentration, and pack cell volume were analysed as ...

  5. Anthocyanin content of two hibiscus sabdariffa cultivars grown

    African Journals Online (AJOL)

    Sukwattanasinit T., Burana-osot J., Sotanaphun. U. 2007. Spectrophotometric Method for. Quantitative Determination of Total. Anthocyanins and Quality Characteristics of Roselle (Hibiscus sabdariffa). Planta Med. 73 (14) : 1517 - 1522. Torres-Morán M.I., Escoto-Delgadillo M., Ron-Parra. J., Parra-Tovar G., Mena-Munguía ...

  6. In vitro antioxidant, anti-inflammatory, cytotoxic activities against prostate cancer of extracts from Hibiscus sabdariffa leaves.

    Science.gov (United States)

    Worawattananutai, Patsorn; Itharat, Arunporn; Ruangnoo, Srisopa

    2014-08-01

    Hibiscus sabdariffa (HS) leaves are a vegetable, which is used as a healthy sour soup for protection against chronic diseases in Thai traditional medicine. To investigate antioxidant, anti-inflammatory and cytotoxic activities of Hibiscus sabdariffa leave extracts from diferent extraction methods. Fresh and dry Hibiscus sabdariffa leaves were extracted by various methods such as maceration with 95% and 50% ethanol, squeeze, and boiling with water or decoction. All extracts were testedfor antioxidant activity by using DPPH radical scavenging assay, anti-inflammatory activity by determination on inhibitory effect of nitric oxide production on RAW264. 7 cell. Cytotoxic activity also tested against human prostate cancer cell line (PC-3) by using sulforhodamine B (SRB) assay. Total phenolic content determined by the Folin-Ciocalteu colorimetric method. The results found that the 95% ethanolic extract of Hibiscus sabdariffa dried leaves (HSDE95) showed the highest antioxidant activity with an EC50 of 34.51±2.62 μg/ml and had the highest phenolic content (57.00±3.73 mg GAE/g). HSDE95 also showed potent cytotoxicity against prostate cancer cell line with an IC50 of 8.58±0.68 μg/ml whereas HSDE95 and all of extracts ofHibiscus sabdariffa leaves had no anti-inflammatory activity. The obtained results revealed that HSDE95 extract showedpotent cytotoxic activity against prostate cancer cells but low antioxidant and anti-inflammatory activities. This extract should be further isolated as active compounds against prostate cancer.

  7. Membrane Stabilizing Activity And Phytochemistry Of Hibiscus rosa ...

    African Journals Online (AJOL)

    The human erythrocyte membrane stabilizing activity of saline extract of Hibiscus rosa-sinensis leaves was investigated as part of efforts at validating its use as anti-arthritic and anti-inflammatory agent. The results of the membrane stabilizing activity of the extract, when compared to two non-steroidal anti-inflammatory drugs ...

  8. Comparative Antioxidant Activity of Hibiscus sabdariffa and Ascorbic ...

    African Journals Online (AJOL)

    Lipid peroxidation is becoming a popular biological marker of oxidative stress. Hibiscus sabdariffa has been reported to serve as a herbal remedy for various disease conditions, but studies on its antioxidant activity and the extent to which it acts remain scarce. The antioxidant activity of H. sabdariffa aqueous extracts, ...

  9. Notice to nurserymen of the nameing and release for propagation of lufin white an american hardy hibiscus cultivar

    Science.gov (United States)

    Hibiscus laevis ‘LUFKIN WHITE’, a new hardy native ornamental hibiscus cultivar is recommended for trial by nurserymen and horticulturists as a summer flowering perennial landscape plant nationwide but is particularly adapted to conditions in the South. ‘LUFKIN WHITE’ was selected for its exception...

  10. Domestic violence in Chimamanda Ngozi Adichie's Purple Hibiscus ...

    African Journals Online (AJOL)

    Gender-based violence is an issue that has become a part of modern society, cutting across cultures, race, ethnicity and status. In Adichie's Purple Hibiscus, gender-based violence manifests in the form of domestic violence, projected through the Eugene Achike family around whom the story, set in the eastern part of ...

  11. Components in aqueous Hibiscus rosa-sinensis flower extract inhibit in vitro melanoma cell growth

    Directory of Open Access Journals (Sweden)

    Karina H. Goldberg

    2017-01-01

    Full Text Available Skin cancer is extremely common, and melanoma causes about 80% of skin cancer deaths. In fact, melanoma kills over 50 thousand people around the world each year, and these numbers are rising. Clearly, standard treatments are not effectively treating melanoma, and alternative therapies are needed to address this problem. Hibiscus tea has been noted to have medicinal properties, including anticancer effects. Extracts from Hibiscus have been shown to inhibit the growth of a variety of cancer cells. In particular, recent studies found that polyphenols extracted from Hibiscus sabdariffa by organic solvents can inhibit melanoma cell growth. However, effects of aqueous extracts from Hibiscus rosa-sinesis flowers, which are commonly used to make traditional medicinal beverages, have not been examined on melanoma cells. Here, we report that aqueous H. rosa-sinesis flower extract contains compounds that inhibit melanoma cell growth in a dose dependent manner at concentrations that did not affect the growth of nontransformed cells. In addition, these extracts contain low molecular weight growth inhibitory compounds below 3 kD in size that combine with larger compounds to more effectively inhibit melanoma cell growth. Future work should identify these compounds, and evaluate their potential to prevent and treat melanoma and other cancers.

  12. Anti-inflammatory activity and molecular mechanism of delphinidin 3-sambubioside, a Hibiscus anthocyanin.

    Science.gov (United States)

    Sogo, Takayuki; Terahara, Norihiko; Hisanaga, Ayami; Kumamoto, Takuma; Yamashiro, Takaaki; Wu, Shusong; Sakao, Kozue; Hou, De-Xing

    2015-01-01

    Delphinidin 3-sambubioside (Dp3-Sam), a Hibiscus anthocyanin, was isolated from the dried calices of Hibiscus sabdariffa L, which has been used for folk beverages and herbal medicine although the molecular mechanisms are poorly defined. Based on the properties of Dp3-Sam and the information of inflammatory processes, we investigated the anti-inflammatory activity and molecular mechanisms in both cell and animal models in the present study. In the cell model, Dp3-Sam and Delphinidin (Dp) reduced the levels of inflammatory mediators including iNOS, NO, IL-6, MCP-1, and TNF-α induced by LPS. Cellular signaling analysis revealed that Dp3-Sam and Dp downregulated NF-κB pathway and MEK1/2-ERK1/2 signaling. In animal model, Dp3-Sam and Dp reduced the production of IL-6, MCP-1 and TNF-α and attenuated mouse paw edema induced by LPS. Our in vitro and in vivo data demonstrated that Hibiscus Dp3-Sam possessed potential anti-inflammatory properties. © 2015 International Union of Biochemistry and Molecular Biology.

  13. Descriptores para la caracterización y registro de variedades cubanas de Flor de Jamaica (Hibiscus sabdariffa L.)

    OpenAIRE

    González Cepero, María C

    2014-01-01

    Se describen las principales características de la Flor de Jamaica (Hibiscus sabdariffa L.) así como el momento y la forma de evaluación The main characteristics of the Flor de Jamaica (Hibiscus sabdariffa L.) are described as well as the evaluation period and evaluation way

  14. Hibiscus sabdariffa L. - a phytochemical and pharmacological review.

    Science.gov (United States)

    Da-Costa-Rocha, Inês; Bonnlaender, Bernd; Sievers, Hartwig; Pischel, Ivo; Heinrich, Michael

    2014-12-15

    Hibiscus sabdariffa L. (Hs, roselle; Malvaceae) has been used traditionally as a food, in herbal drinks, in hot and cold beverages, as a flavouring agent in the food industry and as a herbal medicine. In vitro and in vivo studies as well as some clinical trials provide some evidence mostly for phytochemically poorly characterised Hs extracts. Extracts showed antibacterial, anti-oxidant, nephro- and hepato-protective, renal/diuretic effect, effects on lipid metabolism (anti-cholesterol), anti-diabetic and anti-hypertensive effects among others. This might be linked to strong antioxidant activities, inhibition of α-glucosidase and α-amylase, inhibition of angiotensin-converting enzymes (ACE), and direct vaso-relaxant effect or calcium channel modulation. Phenolic acids (esp. protocatechuic acid), organic acid (hydroxycitric acid and hibiscus acid) and anthocyanins (delphinidin-3-sambubioside and cyanidin-3-sambubioside) are likely to contribute to the reported effects. More well designed controlled clinical trials are needed which use phytochemically characterised preparations. Hs has an excellent safety and tolerability record. Copyright © 2014 The Authors. Published by Elsevier Ltd.. All rights reserved.

  15. Comparative water relation of three varieties of Hibiscus cannabinus ...

    African Journals Online (AJOL)

    PROMOTING ACCESS TO AFRICAN RESEARCH ... Kenaf (Hibiscus cannabinus L.) is an industrial fiber crop that is being grown ... Throughout a period of 120 days, parameters of gas exchange characteristics were measured within four regular intervals of 30 days. ... EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT

  16. Green synthesis of gold and silver nanoparticles using Hibiscus rosa sinensis

    Science.gov (United States)

    Philip, Daizy

    2010-03-01

    Biological synthesis of gold and silver nanoparticles of various shapes using the leaf extract of Hibiscus rosa sinensis is reported. This is a simple, cost-effective, stable for long time and reproducible aqueous room temperature synthesis method to obtain a self-assembly of Au and Ag nanoparticles. The size and shape of Au nanoparticles are modulated by varying the ratio of metal salt and extract in the reaction medium. Variation of pH of the reaction medium gives silver nanoparticles of different shapes. The nanoparticles obtained are characterized by UV-vis, transmission electron microscopy (TEM), X-ray diffraction (XRD) and FTIR spectroscopy. Crystalline nature of the nanoparticles in the fcc structure are confirmed by the peaks in the XRD pattern corresponding to (1 1 1), (2 0 0), (2 2 0) and (3 1 1) planes, bright circular spots in the selected area electron diffraction (SAED) and clear lattice fringes in the high-resolution TEM image. From FTIR spectra it is found that the Au nanoparticles are bound to amine groups and the Ag nanoparticles to carboxylate ion groups.

  17. Haematological effects of aqueous extract of Hibiscus Sabdariffa

    African Journals Online (AJOL)

    The present study was undertaken to investigate the effects of aqueous extract of Hibiscus sabdariffa petals on some haematological parameters. The extract was administered orally in doses of 0.5, 1.0 and 1.5mg/kg body weight to normal Wistar rats for 21 days. The results showed that the extract decreased significantly (p ...

  18. Pollen and Anther Cultures as Potential Means in Production of Haploid Kenaf (Hibiscus Cannabinus L.)

    OpenAIRE

    Susanto, Dwi; Ibrahim, Ahmed Mahmood; Mat Hussin, Zeti Ermiena Surya

    2013-01-01

    Kenaf (Hibiscus cannabinus L.) is one of the important species of Hibiscus for human needs. It is annual upright plant that produces high biomass, has good adaptability to its environment and inexpensive to be grown. Kenaf has been cultivated in many countries since long time ago mainly for fibers. In Malaysia, however, this plant is considered new and cultivated especially in the eastern parts of Peninsular to replace tobacco plantations that have been no longer supported by the government. ...

  19. Gender Analysis Of Electronic Information Resource Use: The Case ...

    African Journals Online (AJOL)

    Based on the findings the study concluded that access and use of electronic information resources creates a “social digital divide” along gender lines. The study ... Finally, the library needs to change its marketing strategies on the availability of electronic information resources to increase awareness of these resources.

  20. Anthocyanin content of two Hibiscus sabdariffa cultivars grown in ...

    African Journals Online (AJOL)

    Anthocyanin content of Hibiscus sabdariffa calyces was determined to compare two cultivars from Senegal called Koor and Vimto. Results showed a significant difference in terms of total anthocyanin content (TA) and relative abundance (RA) of anthocyanin species. Values of TA for Vimto were 3-fold higher than Koor's.

  1. The Aqueous Calyx Extract of Hibiscus sabdariffa Lowers Blood ...

    African Journals Online (AJOL)

    Summary: The antihypertensive effect of Hibiscus sabdariffa (HS) has been validated in animals and man. This study tested the hypothesis that its hypotensive effect may be sympathetically mediated. The cold pressor test (CPT) and handgrip exercise (HGE) were performed in 20 healthy subjects before and after the oral ...

  2. Effect of Hibiscus sabdariffa on Blood Pressure and Electrolyte ...

    African Journals Online (AJOL)

    Effect of Hibiscus sabdariffa on Blood Pressure and Electrolyte Profile of Mild to Moderate Hypertensive Nigerians: A Comparative Study with Hydrochlorothiazide. ... Aim: The aim of this study is to investigate the effect of HS consumption on blood pressure (BP) and electrolytes of mild to moderate hypertensive Nigerians ...

  3. Fermentation potentials of Citrus limon and Hibiscus sabdariffa juice ...

    African Journals Online (AJOL)

    This study aimed to determine the fermentation potentials of yeast isolates from Citrus limon and Hibiscus sabdariffa for the fermentation of juice extracts of C. limon and H. sabdariffa. Isolation and morphological studies of yeast cells were carried out by standard protocols. Fourier Transform Infra-red (FT-IR) ...

  4. Hibiscus fiber carbon for fuel cell device material

    International Nuclear Information System (INIS)

    Nanik Indayaningsih; Anne Zulfia; Dedi Priadi; Suprapedi

    2010-01-01

    The objective of this research is carbon of hibiscus fibers for the application as basic material of fuel cell device. The carbon is made using a pyrolysis process in inert gas (nitrogen) for 1 hour at temperature of 500 °C, 700 °C and 900 °C. The X-Ray Diffractometer (XRD), Scanning Electron Microscope (SEM) and Impedance-Capacitance-Resistance-meter are used to find out the microstructure, morphology and electrical properties respectively. The results of the experiment showed that the carbon had a structure of amorphous, and as the semiconductor material the electrical conductivity was 5 x 10"-"5 S.cm"-"1 to 4.9 x 10"-"5 S.cm"-"1 increasing in accordance with the pyrolysis temperature. The morphology resembled to plaited mats constructed by porous fibers having width of 50 µm to 300 µm, thickness of 25 µm to 35 µm, and the porous size of 0.5 µm to 5 µm. This morphology enables carbon to be applied as a candidate for a basic material of the Proton Exchange Membrane Fuel Cell. (author)

  5. Users satisfaction with electronic information resources and services ...

    African Journals Online (AJOL)

    This study investigated users satisfaction on the use of electronic information resources and services in MTN Net libraries in ABU & UNIBEN. Two objectives and one null hypotheses were formulated and tested with respect to the users' satisfaction on electronic information resources and services in MTN Net libraries in ...

  6. Lipophilization and MS characterization of the main anthocyanins purified from hibiscus flowers.

    Science.gov (United States)

    Grajeda-Iglesias, Claudia; Salas, Erika; Barouh, Nathalie; Baréa, Bruno; Figueroa-Espinoza, Maria Cruz

    2017-09-01

    Hibiscus sabdariffa flowers represent an interesting source of anthocyanins, one of the most important plant pigments, which are responsible of the intense red color of the calyces, and have potential as natural colorants for food applications. Nevertheless, anthocyanins are highly hydrosoluble and unstable compounds. On this basis, the aim of this work was to increase the lipophilicity of the hibiscus anthocyanins by lipophilization, in order to obtain amphiphilic colorants, which could be easily incorporated in lipid-rich food matrices. Octanoyl derivatives of delphinidin-3-O-sambubioside and cyanidin-3-O-sambubioside were chemically obtained for the first time, and characterized by means of HPLC-ESI-MS data. Copyright © 2017. Published by Elsevier Ltd.

  7. Anthocyanin extracted from Hibiscus (Hibiscus rosa sinensis L.) as a photosensitizer on nanostructured-TiO2 dye sensitized solar cells

    Science.gov (United States)

    Ramelan, A. H.; Wahyuningsih, S.; Rosyida, N. A.; Supriyanto, E.; Saputro, S.; Hanif, Q. A.; Rinawati, L.

    2016-02-01

    Anthocyanin extracted from Hibiscus (Hibiscus rosa sinensis L) as a photosensitizer in nanostructured-TiO2 dye sensitized solar cells has been fabricated. Ultravisible visible absorption spectra of anthocyanin show an ability absorbing light in the visible region. While the nanostructed-TiO2 powder in this research was prepared by sol-gel method following annealled at a temperature of 600°C. Subsequently, the TiO2 nanostructures were characterized by XRD, XRF, and SEM. The difractogram X-ray results shown that TiO2 was built from f anatase and rutile phase. Element analysis of synthesized TiO2 by X-ray Fluorecence (XRF) shown the TiO2 content of 98,67 wt%. TiO2 layer prepared at different thickness showed the average size of cavity about 0.83 µm. These several thickness of solar cells were fabricated and were immersed into anthocyanin for 24 hours to gain sensitized TiO2 photoanode for Dye sensitised solar cells (DSSCs). These DSSCS performance were measured using I-V Keithley 2602A. The results exhibited that the sample with a TiO2 layer thickness of 4.75 ± 0.8 µm has the highest efficiency.

  8. Green Synthesis Methods of CoFe_2O_4 and Ag-CoFe_2O_4 Nanoparticles Using Hibiscus Extracts and Their Antimicrobial Potential

    International Nuclear Information System (INIS)

    Gingasu, D.; Mindru, I.; Patron, L.; Caleron-Moreno, J.M.; Mocioiu, O.C.; Preda, S.; Stanica, N.; Nita, S.; Dobre, N.; Popa, M.; Gradisteanu, G.; Chifiriuc, M. C.

    2016-01-01

    The cobalt ferrite (CoFe_2O_4) and silver-cobalt ferrite (Ag-CoFe_2O_4) nanoparticles were obtained through self-combustion and wet ferritization methods using aqueous extracts of Hibiscus rosa-sinensis flower and leaf. X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, and magnetic measurements were used for the characterization of the obtained oxide powders. The antimicrobial activity of the cobalt ferrite and silver-cobalt ferrite nanoparticles against Gram-positive and Gram-negative bacteria, as well as fungal strains, was investigated by qualitative and quantitative assays. The most active proved to be the Ag-CoFe_2O_4 nanoparticles, particularly those obtained through self-combustion using hibiscus leaf extract, which exhibited very low minimal inhibitory concentration values (0.031-0.062 mg/ml) against all tested microbial strains, suggesting their potential for the development of novel antimicrobial agents.

  9. Green Synthesis Methods of CoFe2O4 and Ag-CoFe2O4 Nanoparticles Using Hibiscus Extracts and Their Antimicrobial Potential

    Directory of Open Access Journals (Sweden)

    Dana Gingasu

    2016-01-01

    Full Text Available The cobalt ferrite (CoFe2O4 and silver-cobalt ferrite (Ag-CoFe2O4 nanoparticles were obtained through self-combustion and wet ferritization methods using aqueous extracts of Hibiscus rosa-sinensis flower and leaf. X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, and magnetic measurements were used for the characterization of the obtained oxide powders. The antimicrobial activity of the cobalt ferrite and silver-cobalt ferrite nanoparticles against Gram-positive and Gram-negative bacteria, as well as fungal strains, was investigated by qualitative and quantitative assays. The most active proved to be the Ag-CoFe2O4 nanoparticles, particularly those obtained through self-combustion using hibiscus leaf extract, which exhibited very low minimal inhibitory concentration values (0.031–0.062 mg/mL against all tested microbial strains, suggesting their potential for the development of novel antimicrobial agents.

  10. Study of the hibiscus esculentus mucilage coagulation–flocculation ...

    African Journals Online (AJOL)

    The flocculent activity of Hibiscus esculentus (gombo) mucilage traditionally used for a local beer (Tchapalo) clarification in Côte d\\'Ivoire was studied using the method of the experimental designs. Of the three factors selected that are the volume of mucilage (X1), the temperature (X2) and the pH (X3), sole X1 and X3 ...

  11. Effect of aqueous extract of Hibiscus sabdariffa Calyces on anaemia ...

    African Journals Online (AJOL)

    The effect of aqueous extract of Hibiscus sabdariffa Calyces on anaemia-induced and normal wistar albino rats were investigated using standard protocols. The haematological parameters which include haemoglobin concentration, packed cell volume, erythrocyte sedimentation rate, Red Blood Cell count and White Blood ...

  12. Effects of Orthosiphon grandiflorus, Hibiscus sabdariffa and Phyllanthus amarus extracts on risk factors for urinary calcium oxalate stones in rats.

    Science.gov (United States)

    Woottisin, Surachet; Hossain, Rayhan Zubair; Yachantha, Chatchai; Sriboonlue, Pote; Ogawa, Yoshihide; Saito, Seiichi

    2011-01-01

    We evaluated the antilithic effect of Orthosiphon grandiflorus, Hibiscus sabdariffa and Phyllanthus amarus extracts on known risk factors for calcium oxalate stones in rats. We divided 30 male Wistar rats into 5 equal groups. Controls were fed a standard diet and the remaining groups received a 3% glycolate diet for 4 weeks to induce hyperoxaluria. One glycolate fed group served as the untreated group and the others were given oral extracts of Orthosiphon grandiflorus, Hibiscus sabdariffa or Phyllanthus amarus at a dose of 3.5 mg daily. We collected 24-hour urine and blood samples. Kidneys were harvested for histological examination. We measured the renal tissue content of calcium and oxalate. The Hibiscus sabdariffa group showed significantly decreased serum oxalate and glycolate, and higher oxalate urinary excretion. The Phyllanthus amarus group showed significantly increased urinary citrate vs the untreated group. Histological examination revealed less CaOx crystal deposition in the kidneys of Hibiscus sabdariffa and Phyllanthus amarus treated rats than in untreated rats. Those rats also had significantly lower renal tissue calcium content than untreated rats. All parameters in the Orthosiphon grandiflorus treated group were comparable to those in the untreated group. Hibiscus sabdariffa and Phyllanthus amarus decreased calcium crystal deposition in the kidneys. The antilithic effect of Hibiscus sabdariffa may be related to decreased oxalate retention in the kidney and more excretion into urine while that of Phyllanthus amarus may depend on increased urinary citrate. In contrast, administering Orthosiphon grandiflorus had no antilithic effect. Copyright © 2011 American Urological Association Education and Research, Inc. Published by Elsevier Inc. All rights reserved.

  13. Origin and diversification of Hibiscus glaber, species endemic to the oceanic Bonin Islands, revealed by chloroplast DNA polymorphism.

    Science.gov (United States)

    Takayama, Koji; Ohi-Toma, Tetsuo; Kudoh, Hiroshi; Kato, Hidetoshi

    2005-04-01

    Abstract Two woody Hibiscus species co-occur in the Bonin Islands of the northwestern Pacific Ocean: Hibiscus glaber Matsum. is endemic to the islands, and its putative ancestral species, Hibiscus tiliaceus L., is widely distributed in coastal areas of the tropics and subtropics. To infer isolating mechanisms that led to speciation of H. glaber and the processes that resulted in co-occurrence of the two closely related species on the Bonin Islands, we conducted molecular phylogenetic analyses on chloroplast DNA (cpDNA) sequences. Materials collected from a wide area of the Pacific and Indian Oceans were used, and two closely related species, Hibiscus hamabo Siebold Zucc. and Hibiscus macrophyllus Roxb., were also included in the analyses. The constructed tree suggested that H. glaber has been derived from H. tiliaceus, and that most of the modern Bonin populations of H. tiliaceus did not share most recent ancestry with H. glaber. Geographic isolation appears to be the most important mechanism in the speciation of H. glaber. The co-occurrence of the two species can be attributed to multiple migrations of different lineages into the islands. While a wide and overlapping geographical distribution of haplotypes was found in H. tiliaceus, localized geographical distribution of haplotypes was detected in H. glaber. It is hypothesized that a shift to inland habitats may have affected the mode of seed dispersal from ocean currents to gravity and hence resulted in geographical structuring of H. glaber haplotypes.

  14. Neuroprotective effect of the methanolic extract of Hibiscus asper leaves in 6-hydroxydopamine-lesioned rat model of Parkinson's disease.

    Science.gov (United States)

    Hritcu, Lucian; Foyet, Harquin Simplice; Stefan, Marius; Mihasan, Marius; Asongalem, Acha Emmanuel; Kamtchouing, Pierre

    2011-09-01

    While the Hibiscus asper Hook.f. (Malvaceae) is a traditional herb largely used in tropical region of the Africa as vegetable, potent sedative, tonic and restorative, anti-inflammatory and antidepressive drug, there is very little scientific data concerning the efficacy of this. The antioxidant and antiapoptotic activities of the methanolic extract of Hibiscus asper leaves (50 and 100 mg/kg) were assessed using superoxide dismutase (SOD), glutathione peroxidase (GPX) and catalase (CAT) specific activities, total glutathione (GSH) content, malondialdehyde (MDA) level (lipid peroxidation) and DNA fragmentation assays in male Wistar rats subjected to unilateral 6-hydroxydopamine (6-OHDA)-lesion. In 6-OHDA-lesioned rats, methanolic extract of Hibiscus asper leaves showed potent antioxidant and antiapoptotic activities. Chronic administration of the methanolic extract (50 and 100 mg/kg, i.p., daily, for 7 days) significantly increased antioxidant enzyme activities (SOD, GPX and CAT), total GSH content and reduced lipid peroxidation (MDA level) in rat temporal lobe homogenates, suggesting antioxidant activity. Also, DNA cleavage patterns were absent in the 6-OHDA-lesioned rats treated with methanolic extract of Hibiscus asper leaves, suggesting antiapoptotic activity. Taken together, our results suggest that the methanolic extract of Hibiscus asper leaves possesses neuroprotective activity against 6-OHDA-induced toxicity through antioxidant and antiapoptotic activities in Parkinson's disease model. Copyright © 2011 Elsevier Ireland Ltd. All rights reserved.

  15. Inhibition of angiotensin convertin enzyme (ACE) activity by the anthocyanins delphinidin- and cyanidin-3-O-sambubiosides from Hibiscus sabdariffa.

    Science.gov (United States)

    Ojeda, Deyanira; Jiménez-Ferrer, Enrique; Zamilpa, Alejandro; Herrera-Arellano, Armando; Tortoriello, Jaime; Alvarez, Laura

    2010-01-08

    The beverages of Hibiscus sabdariffa calyces are widely used in Mexico as diuretic, for treating gastrointestinal disorders, liver diseases, fever, hypercholesterolemia and hypertension. Different works have demonstrated that Hibiscus sabdariffa extracts reduce blood pressure in humans, and recently, we demonstrated that this effect is due to angiotensin converting enzyme (ACE) inhibitor activity. The aim of the current study was to isolate and characterizer the constituents responsible of the ACE activity of the aqueous extract of Hibiscus sabdariffa. Bioassay-guided fractionation of the aqueous extract of dried calyces of Hibiscus sabdariffa using preparative reversed-phase HPLC, and the in vitro ACE Inhibition assay, as biological monitor model, were used for the isolation. The isolated compounds were characterized by spectroscopic methods. The anthocyanins delphinidin-3-O-sambubioside (1) and cyanidin-3-O-sambubioside (2) were isolated by bioassay-guided purification. These compounds showed IC(50) values (84.5 and 68.4 microg/mL, respectively), which are similar to those obtained by related flavonoid glycosides. Kinetic determinations suggested that these compounds inhibit the enzyme activity by competing with the substrate for the active site. The competitive ACE inhibitor activity of the anthocyanins 1 and 2 is reported for the first time. This activity is in good agreement with the folk medicinal use of Hibiscus sabdariffa calyces as antihypertensive. Copyright 2009 Elsevier Ireland Ltd. All rights reserved.

  16. Effects of aqueous extract of Hibiscus sabdariffa calyces on ...

    African Journals Online (AJOL)

    The effect of aqueous extract of Hibiscus sabdariffa calyces on the haematological profile of normal male albino rats was investigated for 28 days using standard methods. The rats were divided into five groups comprising of the control group, I; which received equal volume of distilled water and four treatment groups, II, III, ...

  17. Evaluation of various physico-chemical properties of Hibiscus sabdariffa and L. casei incorporated probiotic yoghurt.

    Science.gov (United States)

    Rasdhari, M; Parekh, T; Dave, N; Patel, V; Subhash, R

    2008-09-01

    The present investigation was carried out to examine the effect of Hibiscus sabdariffa Calyx extract on the physico-chemical properties, sensory attributes, texture and microbial analysis of L. casei incorporated in probiotic yoghurt after manufacture and during storage. Incorporation of Hibiscus sabdariffa Calyx extract into the probiotic yoghurt resulted into decrease in coagulation time by 25 min. The pH ranged from 4.39 to 4.59, TA 0.81 to 1.14%, moisture 3.05 to 3.37 g%, syneresis 18.85 to 24.90 mL/50 g of sample, % inhibition 12.32 to 59.43, TS 21.27 to 24.90 g% and beta-galactosidase activity 1.041 to 3.277. The protein content ranged between 4.11 and 4.14 g% while the fat content ranged between 3.43 and 3.49 g%. No major changes in sensory evaluation were observed on the day of manufacture and during storage for 7 days. Sabdariffa added yoghurt showed a higher score in almost all sensory attributes. Microbial analysis showed a total plate count ranging from 1.8 x 10(4) to 1.85 x 10(7) cfu mL(-1). Yeast and mold counts were negligible in the Sabdariffa yoghurts. Thus the study concludes that incorporation of Hibiscus sabdariffa extract in yoghurt improved the total antioxidant property, organoleptic qualities and decreased the exudation of whey proteins (Syneresis). Thus, Hibiscus sabdariffa Calyces has beneficial influence on the quality of L. casei incorporated probiotic yoghurt.

  18. Organizational matters of competition in electronic educational resources

    Directory of Open Access Journals (Sweden)

    Ирина Карловна Войтович

    2015-12-01

    Full Text Available The article examines the experience of the Udmurt State University in conducting competitions of educational publications and electronic resources. The purpose of such competitions is to provide methodological support to educational process. The main focus is on competition of electronic educational resources. The technology of such contests is discussed through detailed analysis of the main stages of the contest. It is noted that the main task of the preparatory stage of the competition is related to the development of regulations on competition and the definition of criteria for selection of the submitted works. The paper also proposes a system of evaluation criteria of electronic educational resources developed by members of the contest organizing committee and jury members. The article emphasizes the importance of not only the preparatory stages of the competition, but also measures for its completion, aimed at training teachers create quality e-learning resources.

  19. Free radical scavenging activities of pigment extract from Hibiscus ...

    African Journals Online (AJOL)

    The macroporous resin adsorption method was used to purify the pigment from Hibiscus syriacus L. petals. Through the comparison of the adsorption and desorption rates of six types of macroporous resins including AB-8, S-8, NKA-9, DM-130, D101 and 860021 to the pigment, 860021 resin was selected as the most ...

  20. Production of red wine from roselle (Hibiscus sabdariffa) and ...

    African Journals Online (AJOL)

    Red wine was produced from must formulated by mixing 10% (w/v) roselle calyces (Hibiscus sabdriffa var. sabdariffa) Hot water extract with pawpaw juice at the rate of 3:1. The must was formulated using a pure strain of Sacchromyces cerevisiae isolated from palm wine, propagated and pitched at a rate of 8% (v/v).

  1. estimation of planting dates for roselle (hibiscus sabdariffa l.)

    African Journals Online (AJOL)

    thinkexploitsint'l

    2011-06-11

    Jun 11, 2011 ... 2012 to evaluate the effects of planting dates and accessions on the growth and performance of roselle (Hibiscus ... vegetables in soup making, green calyx roselle should be sown in May and harvested not later ... Roselle is native to the region that stretched from India to Malaysia and almost all parts of.

  2. A survey of the microflora of Hibiscus sabdariffa (Roselle) and the ...

    African Journals Online (AJOL)

    hope&shola

    2006-02-02

    Feb 2, 2006 ... The dried calyx of Hibiscus sabdariffa (Roselle) is locally processed into a .... determined by perception with the sense organ upon opening a fresh .... Laboratory Zobo. Fresh. 2 wks old. Fresh. 2 wks old. Bacillus subtilis. +. +.

  3. Kenaf (Hibiscus cannabinus L.) impact on post-germination seedling growth

    Science.gov (United States)

    The chemical interaction between plants, which is referred to as allelopathy, may result in the inhibition of plant growth and development. The objective of this research was to determine the impact of kenaf (Hibiscus cannabinus L.) plant extracts on the post-germination growth of five plant species...

  4. CHALLENGES OF ELECTRONIC INFORMATION RESOURCES IN ...

    African Journals Online (AJOL)

    This paper discusses the role of policy for proper and efficient library services in the electronic era. It points out some of the possible dangers of embarking in electronic resources without a proper focus at hand. Thus, it calls for today's librarians and policy makers to brainstorm and come up with working policies suitable to ...

  5. Effet de l'incorporation de graines d' Hibiscus Sabdariffa (Oseille de ...

    African Journals Online (AJOL)

    Effet de l'incorporation de graines d' Hibiscus Sabdariffa (Oseille de Guinée) dans l'alimentation sur quelques paramètres d'ingestion et de croissance du poulet en aviculture traditionnelle améliorée au Burkina Faso.

  6. [Pharmacological study on hemostasis, analgesic and anti inflammation effects of the alcohol extract of Hibiscus tiliaceus].

    Science.gov (United States)

    Qiu, Fen; Tian, Hui; Zhang, Zhi; Yuan, Xian-Ling; Tan, Yuan-Feng; Ning, Xiao-Qing

    2013-10-01

    To study the effects of hemostasis, analgesic and anti inflammation of the alcohol extract of Hibiscus tiliaceus and offer pharmacological and experimental basis for its safe and effective use in clinic. The effects of hemostasist were observed with tail breaking method, capillary tube method and slide method; Hot board and body distortion induced by acetic acid methods were applied in mice analgesia experiment, the mice model of acute auricle swelling induced by dmi ethylbenzene and capillary permeability induced by acetic acid were applied to observe the anti inflammatory effects. The alcohol extract of Hibiscus tiliaceus could significantly reduce the bleeding time and the clotting time, delay the plant reaction time and reduce the writhing times of the mice, and it also had effect on inhibiting swelling of mice ear and the permeability of the capillary. These results suggest that the alcohol extract of Hibiscus tiliaceus has the effects of hemostasis, analgesic and anti inflammation.

  7. Effect of methanolic extract of Hibiscus sabdariffa in ethanol-induced ...

    African Journals Online (AJOL)

    The objective of this study was to evaluate the activity of Hibiscus sabdariffa on the liver of rats following repeated administration of ethanol. Hepatotoxicity was induced on the rats using ethanol and the levels of serum enzymes such as serum glutamic pyruvic transaminase (SGPT), serum glutamic oxaloacetic transaminase ...

  8. Micro-element contents of roselle ( Hibiscus sabdariffa L.) at different ...

    African Journals Online (AJOL)

    In the western Sahel, leaves of Roselle (Hibiscus sabdariffa) have considerable economic importance because of their nutritional and medical uses. These plant organs are used to supplement nutrients provided by cereals such as millet and sorghum. However, there is a lack of information on the nutrient composition of ...

  9. Synthesis of monodispersed silver nanoparticles using Hibiscus cannabinus leaf extract and its antimicrobial activity

    Science.gov (United States)

    Bindhu, M. R.; Umadevi, M.

    2013-01-01

    Synthesis of silver nanoparticles using leaf extract of Hibiscus cannabinus has been investigated. The influences of different concentration of H. cannabinus leaf extract, different metal ion concentration and different reaction time on the above cases on the synthesis of nanoparticles were evaluated. The synthesized nanoparticles were characterized using UV-vis spectroscopy, Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and Transmission Electron Microscopy (TEM). The prepared silver nanoparticles were monodispersed, spherical in shape with the average particle size of 9 nm and shows surface plasmon peak at 446 nm. The study also reveals that the ascorbic acid present in H. cannabinus leaf extract has been used as reducing agent. The prepared silver nanoparticle shows good antimicrobial activity against Escherichia coli, Proteus mirabilis and Shigella flexneri.

  10. Spatial and temporal transcriptome changes occurring during flower opening and senescence of the ephemeral hibiscus flower, Hibiscus rosa-sinensis.

    Science.gov (United States)

    Trivellini, Alice; Cocetta, Giacomo; Hunter, Donald A; Vernieri, Paolo; Ferrante, Antonio

    2016-10-01

    Flowers are complex systems whose vegetative and sexual structures initiate and die in a synchronous manner. The rapidity of this process varies widely in flowers, with some lasting for months while others such as Hibiscus rosa-sinensis survive for only a day. The genetic regulation underlying these differences is unclear. To identify key genes and pathways that coordinate floral organ senescence of ephemeral flowers, we identified transcripts in H. rosa-sinensis floral organs by 454 sequencing. During development, 2053 transcripts increased and 2135 decreased significantly in abundance. The senescence of the flower was associated with increased abundance of many hydrolytic genes, including aspartic and cysteine proteases, vacuolar processing enzymes, and nucleases. Pathway analysis suggested that transcripts altering significantly in abundance were enriched in functions related to cell wall-, aquaporin-, light/circadian clock-, autophagy-, and calcium-related genes. Finding enrichment in light/circadian clock-related genes fits well with the observation that hibiscus floral development is highly synchronized with light and the hypothesis that ageing/senescence of the flower is orchestrated by a molecular clock. Further study of these genes will provide novel insight into how the molecular clock is able to regulate the timing of programmed cell death in tissues. © The Author 2016. Published by Oxford University Press on behalf of the Society for Experimental Biology.

  11. Use of Electronic Resources in a Private University in Nigeria ...

    African Journals Online (AJOL)

    The study examined awareness and constraints in the use of electronic resources by lecturers and students of Ajayi Crowther University, Oyo, Nigeria. It aimed at justifying the resources expended in the provision of electronic resources in terms of awareness, patronage and factors that may be affecting awareness and use ...

  12. Electronic Resources Management System: Recommendation Report 2017

    KAUST Repository

    Ramli, Rindra M.

    2017-05-01

    This recommendation report provides an overview of the selection process for the new Electronic Resources Management System. The library has decided to move away from Innovative Interfaces Millennium ERM module. The library reviewed 3 system as potential replacements namely: Proquest 360 Resource Manager, Ex Libris Alma and Open Source CORAL ERMS. After comparing and trialling the systems, it was decided to go for Proquest 360 Resource Manager.

  13. Estimation of Planting Dates for Roselle ( Hibiscus sabdariffa L.) in ...

    African Journals Online (AJOL)

    In order to fill the gap existing between the production and consumption of roselle in the humid tropical areas of Nigeria, this experiment was carried out in Owerri between May and December, 2012 to evaluate the effects of planting dates and accessions on the growth and performance of roselle (Hibiscus sabdariffa).

  14. Seed trichome variation in Hibiscus section Furcaria in East Africa ...

    African Journals Online (AJOL)

    The micromorphology of the seed trichomes in Hibiscus section Furcaria in Tropical East Africa was surveyed. The structure of the trichomes was found to be unique for each species examined, where such trichomes are present. Seed trichomes of specimens of H. altissimus Horny from the Kenya and Tanzania coasts were ...

  15. The effect of aqueous extracts of Hibiscus sabdariffa (Sorrel) calyces ...

    African Journals Online (AJOL)

    The effect of aqueous extracts of Hibiscus sabdariffa (Sorrel) calyces on heamatological profile and organ pathological changes in Trypanasoma congolense – infected ... Consumption of the extract significantly (p<0.01) retarded the rate of weight gain in both healthy and infected rats; even though the feed-intake was not ...

  16. Fullerene-Based Symmetry in Hibiscus rosa-sinensis Pollen

    Science.gov (United States)

    Andrade, Kleber; Guerra, Sara; Debut, Alexis

    2014-01-01

    The fullerene molecule belongs to the so-called super materials. The compound is interesting due to its spherical configuration where atoms occupy positions forming a mechanically stable structure. We first demonstrate that pollen of Hibiscus rosa-sinensis has a strong symmetry regarding the distribution of its spines over the spherical grain. These spines form spherical hexagons and pentagons. The distance between atoms in fullerene is explained applying principles of flat, spherical, and spatial geometry, based on Euclid’s “Elements” book, as well as logic algorithms. Measurements of the pollen grain take into account that the true spine lengths, and consequently the real distances between them, are measured to the periphery of each grain. Algorithms are developed to recover the spatial effects lost in 2D photos. There is a clear correspondence between the position of atoms in the fullerene molecule and the position of spines in the pollen grain. In the fullerene the separation gives the idea of equal length bonds which implies perfectly distributed electron clouds while in the pollen grain we suggest that the spines being equally spaced carry an electrical charge originating in forces involved in the pollination process. PMID:25003375

  17. Effect of aqueous extracts of Hibiscus sabdariffa and Zingiber ...

    African Journals Online (AJOL)

    Effect of aqueous extracts of Hibiscus sabdariffa and Zingiber Officinale on blood cholesterol and glucose levels of rats. ... Subsequently, group 3 rats were given 0.8 ml/kg body weight of H. sabdarffa extract, while those in group 4 were given 0.2 ml Z. officinale extract/kg body weight. Rats in group 5 were given 1 ml of H.

  18. Multi-locus DNA barcoding identifies matK as a suitable marker for species identification in Hibiscus L.

    Science.gov (United States)

    Poovitha, Sundar; Stalin, Nithaniyal; Balaji, Raju; Parani, Madasamy

    2016-12-01

    The genus Hibiscus L. includes several taxa of medicinal value and species used for the extraction of natural dyes. These applications require the use of authentic plant materials. DNA barcoding is a molecular method for species identification, which helps in reliable authentication by using one or more DNA barcode marker. In this study, we have collected 44 accessions, representing 16 species of Hibiscus, distributed in the southern peninsular India, to evaluate the discriminatory power of the two core barcodes rbcLa and matK together with the suggested additional regions trnH-psbA and ITS2. No intraspecies divergence was observed among the accessions studied. Interspecies divergence was 0%-9.6% with individual markers, which increased to 0%-12.5% and 0.8%-20.3% when using two- and three-marker combinations, respectively. Differentiation of all the species of Hibiscus was possible with the matK DNA barcode marker. Also, in two-marker combinations, only those combinations with matK differentiated all the species. Though all the three-marker combinations showed 100% species differentiation, species resolution was consistently better when the matK marker formed part of the combination. These results clearly showed that matK is more suitable when compared to rbcLa, trnH-psbA, and ITS2 for species identification in Hibiscus.

  19. use of electronic resources by graduate students of the department

    African Journals Online (AJOL)

    respondent's access electronic resources from the internet via Cybercafé .There is a high ... KEY WORDS: Use, Electronic Resources, Graduate Students, Cybercafé. INTRODUCTION ... Faculty of Education, University of Uyo, Uyo. Olu Olat ...

  20. Mealybugs (Hemiptera: Coccomorpha: Pseudococcidae) attacking Hibiscus rosa-sinensis L. in Malaysia, with two new country records

    Science.gov (United States)

    Sartiami, Dewi; Watson, Gillian W.; Mohamad Roff, M. N.; Idris, A. B.

    2016-11-01

    A survey of mealybugs (Hemiptera: Coccomorpha: Pseudococcidae) attacking the national flower of Malaysia, Hibiscus rosa-sisnensis L. and Hibiscus spp. (Malvaceae) was conducted in Selangor and Kuala Lumpur, Malaysia, from January to March 2016. Adult females were mounted on microscope slides in Canada balsam. The five species identified were Ferrisia dasylirii (Cockerell), Maconellicoccus hirsutus (Green), Paracoccus marginatus Williams and Granara de Willink, Phenacoccus solenopsis (Tinsley) and Pseudococcus jackbeardsleyi Gimpel & Miller. Two of these, the invasive species Ferrisia dasylirii and P. solenopsis were introduced and first recorded in Malaysia.

  1. In vitro inhibitory activities of the extract of Hibiscus sabdariffa L. (family Malvaceae) on selected cytochrome P450 isoforms.

    Science.gov (United States)

    Johnson, Showande Segun; Oyelola, Fakeye Titilayo; Ari, Tolonen; Juho, Hokkanen

    2013-01-01

    Literature is scanty on the interaction potential of Hibiscus sabdariffa L., plant extract with other drugs and the affected targets. This study was conducted to investigate the cytochrome P450 (CYP) isoforms that are inhibited by the extract of Hibiscus sabdariffa L. in vitro. The inhibition towards the major drug metabolizing CYP isoforms by the plant extract were estimated in human liver microsomal incubations, by monitoring the CYP-specific model reactions through previously validated N-in-one assay method. The ethanolic extract of Hibiscus sabdariffa showed inhibitory activities against nine selected CYP isoforms: CYP1A2, CYP2A6, CYP2B6, CYP2C8, CYP2C9, CYP2C19, CYP2D6, CYP2E1 and CYP3A4. The concentrations of the extract which produced 50% inhibition of the CYP isoforms ranged from 306 µg/ml to 1660 µg/ml, and the degree of inhibition based on the IC50 values for each CYP isoform was in the following order: CYP1A2 > CYP2C8 > CYP2D6 > CYP2B6 > CYP2E1 > CYP2C19 > CYP3A4 > CYP2C9 > CYP2A6. Ethanolic extract of Hibiscus sabdariffa caused inhibition of CYP isoforms in vitro. These observed inhibitions may not cause clinically significant herb-drug interactions; however, caution may need to be taken in co-administering the water extract of Hibiscus sabdariffa with other drugs until clinical studies are available to further clarify these findings.

  2. Aqueous Extracts of Hibiscus sabdariffa Calyces to Control Aichi Virus.

    Science.gov (United States)

    D'Souza, Doris H; Dice, Lezlee; Davidson, P Michael

    2016-06-01

    Aqueous Hibiscus sabdariffa extracts possess antimicrobial properties with limited information available on their antiviral effects. Aichi virus (AiV) is an emerging foodborne pathogen that causes gastroenteritis. Vaccines are currently unavailable to prevent their disease transmission. The objective of this study was to determine the antiviral effects of aqueous H. sabdariffa extracts against AiV. AiV at ~5 log PFU/ml was incubated with undiluted (200 mg/ml), 1:1 (100 mg/ml) or 1:5 (40 mg/ml) diluted aqueous hibiscus extract (pH 3.6), phosphate-buffered saline (pH 7.2 as control), or malic acid (pH 3.0, acid control) at 37 °C over 24 h. Treatments were stopped by serially diluting in cell-culture media containing fetal bovine serum and titers were determined using plaque assays on confluent Vero cells. Each treatment was replicated thrice and assayed in duplicate. AiV did not show any significant reduction with 1:1 (100 mg/ml) or 1:5 (40 mg/ml) diluted aqueous hibiscus extracts or malic acid after 0.5, 1, or 2 h at 37 °C. However, AiV titers were reduced to non-detectable levels after 24 h with all the three tested concentrations, while malic acid showed only 0.93 log PFU/ml reduction after 24 h. AiV was reduced by 0.5 and 0.9 log PFU/ml with undiluted extracts (200 mg/ml) after 2 and 6 h, respectively. AiV treated with 1:1 (100 mg/ml) and 1:5 (40 mg/ml) diluted extracts showed a minimal ~0.3 log PFU/ml reduction after 6 h. These extracts show promise to reduce AiV titers mainly through alteration of virus structure, though higher concentrations may have improved effects.

  3. Adichie's Purple Hibiscus and issues of ideology in the constitution ...

    African Journals Online (AJOL)

    ... as subjects, with the eventual emergence of Kambili to self-knowledge and condition of social responsibility. The aim of this is to examine how Adichie's Purple Hibiscus is typical of how the Nigerian novel engages itself in issues of ideology and how these issues, in turn, crystallize the challenges of nation-ness in Nigeria.

  4. Phytochemical analysis of Hibiscus caesius using high performance liquid chromatography coupled with mass spectrometry.

    Science.gov (United States)

    Ain, Quratul; Naveed, Muhammad Na; Mumtaz, Abdul Samad; Farman, Muhammad; Ahmed, Iftikhar; Khalid, Nauman

    2015-09-01

    Various species in genus Hibiscus are traditionally known for their therapeutic attributes. The present study focused on the phytochemical analysis of a rather unexplored species Hibiscus caesius (H. caesius), using high-pressure liquid chromatography coupled with mass spectrometry (HPLC-MS). The analysis revealed five major compounds in the aqueous extract, viz. vanillic acid, protocatechoic acid, quercetin, quercetin glucoside and apigenin, being reported for the first time in H. caesius. Literature suggests that these compounds have important pharmacological traits such as anti-cancer, anti-inflammatory, anti-bacterial and hepatoprotective etc. however, this requires further pharmacological investigations at in vitro and in vivo scale. The above study concluded the medicinal potential of H. caesius.

  5. Colorimetric Analysis of Hibiscus Beverages and their Potential Antioxidant Properties.

    Science.gov (United States)

    Camelo-Méndez, G A; Vanegas-Espinoza, P E; Escudero-Gilete, M L; Heredia, F J; Paredes-López, O; Del Villar-Martínez, A A

    2018-05-25

    In food industry, roselle beverages and their subproducts could be functional ingredients since they are an excellent source of bioactive compounds with improved performance due to their important anthocyanins content. The aim of this study was to analyze anthocyanin content and antioxidant properties of aqueous infusions elaborated with color contrasting Hibiscus materials and design a mathematical model in order to predict color-composition relationship. Color measurements of beverages from roselle (Negra, Sudan and Rosa) were made by transmission spectrophotometry, anthocyanins quantification was determined by HPLC, and antioxidant potential was evaluated by in vitro methods (ABTS and FRAP assays). Beverages prepared with particle size minor of 250 μm presented until 4- and 2- times more anthocyanins content and antioxidant capacity respectively, in comparison to beverages prepared with powders with particle size major of 750 μm. Positive correlations among pigments composition and color parameters were found (p Hibiscus beverages with high anthocyanin content. The obtained models could be an important tool to be used in food industry for pigment characterization or functional compounds with potential health benefits.

  6. Deciduous shrubs for ozone bioindication: Hibiscus syriacus as an example

    Energy Technology Data Exchange (ETDEWEB)

    Paoletti, Elena [Institut Plant Protection (IPP), National Council Research (CNR), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Florence (Italy)], E-mail: e.paoletti@ipp.cnr.it; Ferrara, Anna Maria [Istituto per le Piante da Legno e l' Ambiente (IPLA), Corso Casale 476, 10132 Turin (Italy); Calatayud, Vicent; Cervero, Julia [Fundacion C.E.A.M., Charles R. Darwin 14, Parc Tecnologic, 46980 Paterna, Valencia (Spain); Giannetti, Fabio [Istituto per le Piante da Legno e l' Ambiente (IPLA), Corso Casale 476, 10132 Turin (Italy); Sanz, Maria Jose [Fundacion C.E.A.M., Charles R. Darwin 14, Parc Tecnologic, 46980 Paterna, Valencia (Spain); Manning, William J. [Department of Plant, Soil and Insect Sciences, University of Massachusetts, Amherst, MA 01003-9320 (United States)

    2009-03-15

    Ozone-like visible injury was detected on Hibiscus syriacus plants used as ornamental hedges. Weekly spray of the antiozonant ethylenediurea (EDU, 300 ppm) confirmed that the injury was induced by ambient ozone. EDU induced a 75% reduction in visible injury. Injury was more severe on the western than on the eastern exposure of the hedge. This factor of variability should be considered in ozone biomonitoring programmes. Seeds were collected and seedlings were artificially exposed to ozone in filtered vs. not-filtered (+30 ppb) Open-Top Chambers. The level of exposure inducing visible injury in the OTC seedlings was lower than that in the ambient-grown hedge. The occurrence of visible injury in the OTC confirmed that the ozone sensitivity was heritable and suggested that symptomatic plants of this deciduous shrub population can be successfully used as ozone bioindicators. EDU is recommended as a simple tool for diagnosing ambient ozone visible injury on field vegetation. - An Italian population of the deciduous shrub Hibiscus syriacus, a common ornamental species in temperate zones, is recommended as ozone bioindicator.

  7. Deciduous shrubs for ozone bioindication: Hibiscus syriacus as an example

    International Nuclear Information System (INIS)

    Paoletti, Elena; Ferrara, Anna Maria; Calatayud, Vicent; Cervero, Julia; Giannetti, Fabio; Sanz, Maria Jose; Manning, William J.

    2009-01-01

    Ozone-like visible injury was detected on Hibiscus syriacus plants used as ornamental hedges. Weekly spray of the antiozonant ethylenediurea (EDU, 300 ppm) confirmed that the injury was induced by ambient ozone. EDU induced a 75% reduction in visible injury. Injury was more severe on the western than on the eastern exposure of the hedge. This factor of variability should be considered in ozone biomonitoring programmes. Seeds were collected and seedlings were artificially exposed to ozone in filtered vs. not-filtered (+30 ppb) Open-Top Chambers. The level of exposure inducing visible injury in the OTC seedlings was lower than that in the ambient-grown hedge. The occurrence of visible injury in the OTC confirmed that the ozone sensitivity was heritable and suggested that symptomatic plants of this deciduous shrub population can be successfully used as ozone bioindicators. EDU is recommended as a simple tool for diagnosing ambient ozone visible injury on field vegetation. - An Italian population of the deciduous shrub Hibiscus syriacus, a common ornamental species in temperate zones, is recommended as ozone bioindicator

  8. Electronic resource management practical perspectives in a new technical services model

    CERN Document Server

    Elguindi, Anne

    2012-01-01

    A significant shift is taking place in libraries, with the purchase of e-resources accounting for the bulk of materials spending. Electronic Resource Management makes the case that technical services workflows need to make a corresponding shift toward e-centric models and highlights the increasing variety of e-formats that are forcing new developments in the field.Six chapters cover key topics, including: technical services models, both past and emerging; staffing and workflow in electronic resource management; implementation and transformation of electronic resource management systems; the ro

  9. Utilization of electronic information resources by academic staff at ...

    African Journals Online (AJOL)

    The study investigated the utilization of Electronic Information resources by the academic staff of Makerere University in Uganda. It examined the academic staff awareness of the resources available, the types of resources provided by the Makerere University Library, the factors affecting resource utilization. The study was ...

  10. Effect of rosella ( Hibiscus sabdariffa L ) extract on glutathione-S ...

    African Journals Online (AJOL)

    Purpose: To determine the effect of rosella (Hibiscus sabdariffa L) extract on glutathione-S-trasferase (GST) activity and its hepatoprotective effect. Methods: A total of 25 rats were divided randomly into 5 groups (5 rats per group). Group I served as the baseline, group II was the negative control group, while groups III, IV and ...

  11. Changes in the quality of zobo beverages produced from Hibiscus ...

    African Journals Online (AJOL)

    Quality changes in zobo beverage produced from Hibiscus sabdarifa during storage and the effects of extracts of ginger (Zingiber officinale) alone or in combination with refrigeration at 6C were evaluated for six (6) weeks duration. Results shows that the total viable bacterial count increased from 0.9 ± 0.01 log10 cfu/ml to ...

  12. An overview of the HIBISCUS campaign

    Science.gov (United States)

    Pommereau, J.-P.; Garnier, A.; Held, G.; Gomes, A. M.; Goutail, F.; Durry, G.; Borchi, F.; Hauchecorne, A.; Montoux, N.; Cocquerez, P.; Letrenne, G.; Vial, F.; Hertzog, A.; Legras, B.; Pisso, I.; Pyle, J. A.; Harris, N. R. P.; Jones, R. L.; Robinson, A. D.; Hansford, G.; Eden, L.; Gardiner, T.; Swann, N.; Knudsen, B.; Larsen, N.; Nielsen, J. K.; Christensen, T.; Cairo, F.; Fierli, F.; Pirre, M.; Marécal, V.; Huret, N.; Rivière, E. D.; Coe, H.; Grosvenor, D.; Edvarsen, K.; di Donfrancesco, G.; Ricaud, P.; Berthelier, J.-J.; Godefroy, M.; Seran, E.; Longo, K.; Freitas, S.

    2011-03-01

    The EU HIBISCUS project consisted of a series of field campaigns during the intense convective summers in 2001, 2003 and 2004 in the State of São Paulo in Brazil. Its objective was to investigate the impact of deep convection on the Tropical Tropopause Layer (TTL) and the lower stratosphere by providing a new set of observational data on meteorology, tracers of horizontal and vertical transport, water vapour, clouds, and chemistry in the tropical Upper Troposphere/Lower Stratosphere (UT/LS). This was achieved using short duration research balloons to study local phenomena associated with convection over land, and long-duration balloons circumnavigating the globe to study the contrast between land and oceans. Analyses of observations of short-lived tracers, ozone and ice particles show strong episodic local updraughts of cold air across the lapse rate tropopause up to 18 or 19 km (420-440 K) in the lower stratosphere by overshooting towers. The long duration balloon and satellite measurements reveal a contrast between the composition of the lower stratosphere over land and oceanic areas, suggesting significant global impact of such events. The overshoots are shown to be well captured by non-hydrostatic meso-scale Cloud Resolving Models indicating vertical velocities of 50-60 m s-1 at the top of the Neutral Buoyancy Level (NBL) at around 14 km, but, in contrast, are poorly represented by global Chemistry-Transport Models (CTM) forced by Numerical Weather Forecast Models (NWP) underestimating the overshooting process. Finally, the data collected by the HIBISCUS balloons have allowed a thorough evaluation of temperature NWP analyses and reanalyses, as well as satellite ozone, nitrogen oxide, water vapour and bromine oxide measurements in the tropics.

  13. Electronic Resources Management Project Presentation 2012

    KAUST Repository

    Ramli, Rindra M.

    2012-01-01

    This presentation describes the electronic resources management project undertaken by the KAUST library. The objectives of this project is to migrate information from MS Sharepoint to Millennium ERM module. One of the advantages of this migration

  14. Anti-hepatotoxic activities of Hibiscus sabdariffa L. in animal model of streptozotocin diabetes-induced liver damage.

    Science.gov (United States)

    Adeyemi, David O; Ukwenya, Victor O; Obuotor, Efere M; Adewole, Stephen O

    2014-07-30

    Flavonoid-rich aqueous fraction of methanolic extract of Hibiscus sabdariffa calyx was evaluated for its anti-hepatotoxic activities in streptozotocin-induced diabetic Wistar rats. Diabetes Mellitus was induced in Wistar rats by a single i.p injection of 80 mg/kg b.w. streptozotocin (STZ) dissolved in 0.1 M citrate buffer (pH 6.3). The ameliorative effects of the extract on STZ-diabetes induced liver damage was evident from the histopathological analysis and the biochemical parameters evaluated in the serum and liver homogenates. Reduced levels of glutathione (GSH), catalase (CAT), superoxide dismutase (SOD), and glutathione peroxidase (GPx) (3.76 ± 0.38 μM, 0.42 ± 0.04 U/L, 41.08 ± 3.04 U/ml, 0.82 ± 0.04 U/L respectively) in the liver of diabetic rats were restored to a near normal level in the Hibiscus sabdariffa-treated rats (6.87 ± 0.51 μM, 0.72 ± 0.06 U/L, 87.92 ± 5.26 U/ml, 1.37 ± 0.06 U/L respectively). Elevated levels of aspartate amino transferase (AST), alanine amino transferase (ALT) and alkaline phosphatase (ALP) in the serum of diabetic rats were also restored in Hibiscus sabdariffa -treated rats. Examination of stained liver sections revealed hepatic fibrosis and excessive glycogen deposition in the diabetic rats. These pathological changes were ameliorated in the extract-treated rats. The anti-hepatotoxic activity of Hibiscus sabdariffa extract in STZ diabetic rats could be partly related to its antioxidant activity and the presence of flavonnoids.

  15. Synthesis of monodispersed silver nanoparticles using Hibiscus cannabinus leaf extract and its antimicrobial activity.

    Science.gov (United States)

    Bindhu, M R; Umadevi, M

    2013-01-15

    Synthesis of silver nanoparticles using leaf extract of Hibiscus cannabinus has been investigated. The influences of different concentration of H. cannabinus leaf extract, different metal ion concentration and different reaction time on the above cases on the synthesis of nanoparticles were evaluated. The synthesized nanoparticles were characterized using UV-vis spectroscopy, Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and Transmission Electron Microscopy (TEM). The prepared silver nanoparticles were monodispersed, spherical in shape with the average particle size of 9 nm and shows surface plasmon peak at 446 nm. The study also reveals that the ascorbic acid present in H. cannabinus leaf extract has been used as reducing agent. The prepared silver nanoparticle shows good antimicrobial activity against Escherichia coli, Proteus mirabilis and Shigella flexneri. Copyright © 2012 Elsevier B.V. All rights reserved.

  16. Cardioprotective effect of the Hibiscus rosa sinensis flowers in an oxidative stress model of myocardial ischemic reperfusion injury in rat

    Science.gov (United States)

    Gauthaman, Karunakaran K; Saleem, Mohamed TS; Thanislas, Peter T; Prabhu, Vinoth V; Krishnamoorthy, Karthikeyan K; Devaraj, Niranjali S; Somasundaram, Jayaprakash S

    2006-01-01

    Background The present study investigates the cardioprotective effects of Hibiscus rosa sinensis in myocardial ischemic reperfusion injury, particularly in terms of its antioxidant effects. Methods The medicinal values of the flowers of Hibiscus rosa sinensis (Chinese rose) have been mentioned in ancient literature as useful in disorders of the heart. Dried pulverized flower of Hibiscus rosa sinensis was administered orally to Wistar albino rats (150–200 gms) in three different doses [125, 250 and 500 mg/kg in 2% carboxy methyl cellulose (CMC)], 6 days per week for 4 weeks. Thereafter, rats were sacrificed; either for the determination of baseline changes in cardiac endogenous antioxidants [superoxide dismutase, reduced glutathione and catalase] or the hearts were subjected to isoproterenol induced myocardial necrosis. Results There was significant increase in the baseline contents of thiobarbituric acid reactive substances (TBARS) [a measure of lipid per oxidation] with both doses of Hibiscus Rosa sinensis. In the 250 mg/kg treated group, there was significant increase in superoxide dismutase, reduced glutathione, and catalase levels but not in the 125 and 500 mg/kg treated groups. Significant rise in myocardial thiobarbituric acid reactive substances and loss of superoxide dismutase, catalase and reduced glutathione (suggestive of increased oxidative stress) occurred in the vehicle treated hearts subjected to in vivo myocardial ischemic reperfusion injury. Conclusion It may be concluded that flower of Hibiscus rosa sinensis (250 mg/kg) augments endogenous antioxidant compounds of rat heart and also prevents the myocardium from isoproterenol induced myocardial injury. PMID:16987414

  17. Practical guide to electronic resources in the humanities

    CERN Document Server

    Dubnjakovic, Ana

    2010-01-01

    From full-text article databases to digitized collections of primary source materials, newly emerging electronic resources have radically impacted how research in the humanities is conducted and discovered. This book, covering high-quality, up-to-date electronic resources for the humanities, is an easy-to-use annotated guide for the librarian, student, and scholar alike. It covers online databases, indexes, archives, and many other critical tools in key humanities disciplines including philosophy, religion, languages and literature, and performing and visual arts. Succinct overviews of key eme

  18. Kombucha Rosella (Hibiscus Sabdariffa Linn) dan Kemampuannya sebagai Antihiperkolesterolemia

    OpenAIRE

    Suhartatik, Nanik; Karyantina, Merkuria; Purwanti, Indrias Tri

    2009-01-01

    Kita mengenal adanya teh yang diekstrak dari kelopak bunga rosella (Hibiscus sabdariffa Linn). Teh jenis ini dapat dibuat menjadi kombucha dengan cara memfermentasikan ekstrak rosella menggunakan peran mikrobia dalam fer­ mentasi kombucha. Mikrobia dalam fermentasi kombucha ini ditumbuhkan dalam ekstrak rosella sebagai medium per­ tumbuhan dengan variasi konsentrasi rosella (30, 40, 50 gram rosella kering/L). Selama proses fermentasi, kombucha rosella dianalisis pH, total asam, dan aktivitas ...

  19. Candidatus Phytoplasma brasiliense associado ao superbrotamento do hibisco (Hibiscus rosa-sinensis L. no Estado de São Paulo Candidatus Phytoplasma brasiliense associated with hibiscus witches' broom in the State of São Paulo-Brazil

    Directory of Open Access Journals (Sweden)

    Eliane Gonçalves da Silva

    2009-09-01

    Full Text Available Plantas de hibisco com superbrotamento e definhamento seguido de morte têm sido observadas nos municípios de São Paulo, Campinas e Piracicaba. Como os sintomas são sugestivos daqueles induzidos por fitoplasmas, o presente trabalho buscou identificar o possível fitoplasma associado com a doença. Assim, 14 plantas sintomáticas de hibisco foram coletadas em Piracicaba (SP e submetidas ao PCR duplo com os primers P1/Tint-R16F2n/R2 e ao exame em microscópio eletrônico de transmissão. A identificação foi realizada por análise de RFLP com as enzimas de restrição BfaI, DraI, HaeIII, HhaI, HpaII, MboI, MseI, RsaI e TaqI. Testes de transmissão foram conduzidos com enxertia de ramos e uso de Cuscuta subinclusa. Os resultados de nested-PCR revelaram a presença consistente de fitoplasmas em todas as plantas sintomáticas e foram confirmados pela observação de corpúsculos pleomórficos no floema, através da microscopia eletrônica. A análise de RFLP mostrou que o fitoplasma encontrado em hibisco pertence ao grupo 16SrXV, o mesmo grupo do Candidatus Phytoplasma brasiliense. O fitoplasma foi transmitido de planta doente para sadia, tanto pela enxertia como pela C. subinclusa, demonstrando ser o agente do superbrotamento do hibisco.Ornamental hibiscus have been affected by shoot proliferation and decline followed by death in several cities in São Paulo State, especially São Paulo, Campinas and Piracicaba. As the symptoms are suggestives of those induced by phytoplasmas, the present work aimed to identify the possible phytoplasma associated with the disease. Fourteen symptomatic hibiscus were sampled in Piracicaba, submitted to nested-PCR with the primers P1/Tint-R16F2n/R2 and processed by transmission electron microscopy. The identification was made by RFLP analyses with the restriction enzymes BfaI, DraI, HaeIII, HhaI, HpaII, MboI, MseI, RsaI, and TaqI. Transmission assays were performed by grafting and Cuscuta subinclusa. The presence

  20. Pharmacokinetics of anthocyanidin-3-glycosides following consumption of Hibiscus sabdariffa L. extract.

    Science.gov (United States)

    Frank, Thomas; Janssen, Marlies; Netzel, Michael; Strass, Gabriele; Kler, Adolf; Kriesl, Erwin; Bitsch, Irmgard

    2005-02-01

    Pharmacokinetic parameters of several dietary anthocyanins following consumption of Hibiscus sabdariffa L. extract were determined in 6 healthy volunteers. Subjects were given a single oral dose of 150 mL of Hibiscus sabdariffa L. extract yielding 62.6 mg of cyanidin-3-sambubioside, 81.6 mg of delphindin-3-sambubioside, and 147.4 mg of total anthocyanins (calculated as cyanidin equivalents). Within 7 hours, the urinary excretion of cyanidin-3-sambubioside, delphinidin-3-sambubioside, and total anthocyanins (ie, the sum of all quantifiable anthocyanidin glycosides) was 0.016%, 0.021%, and 0.018% of the administered doses, respectively. Maximum excretion rates were determined at 1.5 to 2.0 hours after intake. The dose-normalized plasma area under the curve estimates were 0.076, 0.032, and 0.050 ng x h/mL/mg for cyanidin-3-sambubioside, delphinidin-3-sambubioside, and total anthocyanins, respectively. The dose-normalized C(max) estimates were 0.036, 0.015, and 0.023 ng/mL/mg in the same sequence. They were reached each at 1.5 hours (median) after intake. The geometric means of t1/2 were 2.18, 3.34, and 2.63 hours for cyanidin-3-sambubioside, delphinidin-3-sambubioside, and total anthocyanins, respectively. The urinary excretion of intact anthocyanins was fast and appeared to be monoexponential. To evaluate the contribution of anthocyanins to the health-protecting effects of Hibiscus sabdariffa L. extract, it will be necessary to perform further studies on both the intact glycosides and their in vivo metabolites or conjugates in human plasma and urine.

  1. Utilisation of Electronic Information Resources By Lecturers in ...

    African Journals Online (AJOL)

    This study assesses the use of information resources, specifically, electronic databases by lecturers/teachers in Universities and Colleges of Education in South Western Nigeria. Information resources are central to teachers' education. It provides lecturers/teachers access to information that enhances research and ...

  2. Discipline, availability of electronic resources and the use of Finnish National Electronic Library - FinELib

    Directory of Open Access Journals (Sweden)

    Sanna Torma

    2004-01-01

    Full Text Available This study elaborated relations between digital library use by university faculty, users' discipline and the availability of key resources in the Finnish National Electronic Library (FinELib, Finnish national digital library, by using nationwide representative survey data. The results show that the perceived availability of key electronic resources by researchers in FinELib was a stronger predictor of the frequency and purpose of use of its services than users' discipline. Regardless of discipline a good perceived provision of central resources led to a more frequent use of FinELib. The satisfaction with the services did not vary with the discipline, but with the perceived availability of resources.

  3. The Role of the Acquisitions Librarian in Electronic Resources Management

    Science.gov (United States)

    Pomerantz, Sarah B.

    2010-01-01

    With the ongoing shift to electronic formats for library resources, acquisitions librarians, like the rest of the profession, must adapt to the rapidly changing landscape of electronic resources by keeping up with trends and mastering new skills related to digital publishing, technology, and licensing. The author sought to know what roles…

  4. Analysis of Pedagogic Potential of Electronic Educational Resources with Elements of Autodidactics

    Directory of Open Access Journals (Sweden)

    Igor A.

    2018-03-01

    Full Text Available Introduction: in recent years didactic properties of electronic educational resources undergo considerable changes, nevertheless, the question of studying of such complete phenomenon as “an electronic educational resource with autodidactics elements” remains open, despite sufficient scientific base of researches of the terms making this concept. Article purpose – determination of essence of electronic educational resources with autodidactics elements. Materials and Methods: the main method of research was the theoretical analysis of the pedagogical and psychological literature on the problem under study. We used the theoretical (analysis, synthesis, comparison and generalization methods, the method of interpretation, pedagogical modeling, and empirical methods (observation, testing, conversation, interview, analysis of students’ performance, pedagogical experiment, peer review. Results: we detected the advantages of electronic educational resources in comparison with traditional ones. The concept of autodidactics as applied to the subject of research is considered. Properties of electronic educational resources with a linear and nonlinear principle of construction are studied.The influence of the principle of construction on the development of the learners’ qualities is shown. We formulated an integral definition of electronic educational resources with elements of autodidactics, namely, the variability, adaptivity and cyclicity of training. A model of the teaching-learning process with electronic educational resources is developed. Discussion and Conclusions: further development of a problem will allow to define whether electronic educational resources with autodidactics elements pedagogical potential for realization of educational and self-educational activity of teachers have, to modify technological procedures taking into account age features of students, their specialties and features of the organization of process of training of

  5. Preservation and conservation of electronic information resources of ...

    African Journals Online (AJOL)

    The major holdings of the broadcast libraries of the Nigerian Television Authority (NTA) are electronic information resources; therefore, providing safe places for general management of these resources have aroused interest in the industry in Nigeria for sometimes. The need to study the preservation and conservation of ...

  6. Cytotoxic Activity of the Leaf and Stem Extracts of Hibiscus rosa ...

    African Journals Online (AJOL)

    Methods: The crude petroleum ether, ethyl acetate and methanol extracts of the leaf and stem of Hibiscus rosa sinensis were prepared using cold extraction method. The in vitro cytotoxic activity of the extracts (20 - 100 μg/ml) was evaluated on leukaemic cancer cell line (K-562) and Mardin-Darby kidney cell line (MDBK) ...

  7. Toxicity studies of the water extract from the calyces of Hibiscus ...

    African Journals Online (AJOL)

    Acute and chronic toxicities of the water extract from calyces of Hibiscus sabdariffa were studied in male and female rats. After 14 days of a single oral administration of test substance 5,000 mg/kg body weight, measurement of the body and organ weights, necropsy and health monitoring were performed. No signs and ...

  8. Building an electronic resource collection a practical guide

    CERN Document Server

    Lee, Stuart D

    2004-01-01

    This practical book guides information professionals step-by-step through building and managing an electronic resource collection. It outlines the range of electronic products currently available in abstracting and indexing, bibliographic, and other services and then describes how to effectively select, evaluate and purchase them.

  9. Analysis of Human Resources Management Strategy in China Electronic Commerce Enterprises

    Science.gov (United States)

    Shao, Fang

    The paper discussed electronic-commerce's influence on enterprise human resources management, proposed and proved the human resources management strategy which electronic commerce enterprise should adopt from recruitment strategy to training strategy, keeping talent strategy and other ways.

  10. Hibiscus sabdariffa calyx palliates insulin resistance, hyperglycemia, dyslipidemia and oxidative rout in fructose-induced metabolic syndrome rats.

    Science.gov (United States)

    Ajiboye, Taofeek O; Raji, Hikmat O; Adeleye, Abdulwasiu O; Adigun, Nurudeen S; Giwa, Oluwayemisi B; Ojewuyi, Oluwayemisi B; Oladiji, Adenike T

    2016-03-30

    The effect of Hibiscus sabdariffa calyx extract was evaluated in high-fructose-induced metabolic syndrome rats. Insulin resistance, hyperglycemia, dyslipidemia and oxidative rout were induced in rats using high-fructose diet. High-fructose diet-fed rats were administered 100 and 200 mg kg(-1) body weight of H. sabdariffa extract for 3 weeks, starting from week 7 of high-fructose diet treatment. High-fructose diet significantly (P Hibiscus extract. Overall, aqueous extract of H. sabdariffa palliates insulin resistance, hyperglycemia, dyslipidemia and oxidative rout in high-fructose-induced metabolic syndrome rats. © 2015 Society of Chemical Industry.

  11. Using XML Technologies to Organize Electronic Reference Resources

    OpenAIRE

    Huser, Vojtech; Del Fiol, Guilherme; Rocha, Roberto A.

    2005-01-01

    Provision of access to reference electronic resources to clinicians is becoming increasingly important. We have created a framework for librarians to manage access to these resources at an enterprise level, rather than at the individual hospital libraries. We describe initial project requirements, implementation details, and some preliminary results.

  12. Electronic Resources and Mission Creep: Reorganizing the Library for the Twenty-First Century

    Science.gov (United States)

    Stachokas, George

    2009-01-01

    The position of electronic resources librarian was created to serve as a specialist in the negotiation of license agreements for electronic resources, but mission creep has added more functions to the routine work of electronic resources such as cataloging, gathering information for collection development, and technical support. As electronic…

  13. Comparison of Antioxidative Activity among Different Types of Hibiscus

    OpenAIRE

    Uezu, Eiko; Fu, Churan; Kyan, Chie; Nago, Chihiro; 上江洲, 榮子; 付, 楚然; 喜屋武,千 恵; 名護, ちひろ

    2013-01-01

    Increased longevity among the population of Okinawa has led to considerable international interest in the role that the local diet and custom might play in this phenomenon. The research has indicated that flowers used for the food have potential health benefit. To explore their value as functional foods, the antioxidative properties of Hibiscus rosa-sinensis, which is the most common flower in Okinawa, was evaluated. The antioxidative activity of three types of the flower-red, orange, and yel...

  14. Destruction of the Phoenix/Hibiscus and Barringtonia racemosa Communities at Richards Bay, Natal, South Africa

    Directory of Open Access Journals (Sweden)

    P. J. Weisser

    1982-10-01

    Full Text Available The destruction of the Phoenix!Hibiscus and Barringtonia racemosa Communities described by Venter in 1972 on the southern shores of Richards Bay is reported. The cause was the artificial openingof a new mouth about 5,5 km south of the original mouth, which increased tidal range and salinity. These swamp communities occupied a narrow band about 6 ha in area behind the Bruguiera gymnorrhiza Community. An estimated 95 % of the communities was affected and only on the landward border were some isolated remnants of species such as Acrostichum aureum, Hibiscus tiliaceus and Phoenix reclinata detected .Young stands of  Phragmites australis, seedlings of  Bruguiera gymnorrhiza and Avicennia marina and epipelic algae are recoIonizing the affected area.

  15. Molecular characterization of ferulate 5-hydroxylase gene from kenaf (Hibiscus cannabinus L.)

    Science.gov (United States)

    The purpose of this research was to clone and characterize the expression pattern of a kenaf (Hibiscus cannabinus L.) F5H gene that encodes ferulate 5-hydroxylase in the phenylpropanoid pathway. Kenaf is well known as a fast growing dicotyledonous plant, which makes it a valuable biomass plant. The ...

  16. Electronic Resources Management System: Recommendation Report 2017

    KAUST Repository

    Ramli, Rindra M.

    2017-01-01

    This recommendation report provides an overview of the selection process for the new Electronic Resources Management System. The library has decided to move away from Innovative Interfaces Millennium ERM module. The library reviewed 3 system

  17. Antihyperlipidemic activity of Hibiscus rosa-sinensis Linn. ethanolic extract fractions

    OpenAIRE

    Mukesh Singh Sikarwar; M B Patil

    2015-01-01

    Aim: The study investigates the antihyperlipidemic effect of Hibiscus rosa-sinensis Linn. (Malvaceae) ethanolic extract fractions in triton and atherogenic diet-induced hyperlipidemic rats. Materials and Methods: Oral administrations of 500 mg/kg body weight of various fractions of selected plant were evaluated for possible antihyperlipidemic activity in triton and atherogenic diet-induced hyperlipidemic rats for duration of 48 h and 14 days respectively. In triton model, hyperlipidemia was i...

  18. Volatiles and primary metabolites profiling in two Hibiscus sabdariffa (roselle) cultivars via headspace SPME-GC-MS and chemometrics.

    Science.gov (United States)

    Farag, Mohamed A; Rasheed, Dalia M; Kamal, Islam M

    2015-12-01

    Hibiscus sabdariffa (roselle) is a plant of considerable commercial importance worldwide as functional food due to its organic acids, mucilage, anthocyanins, macro and micro-nutrients content. Although Hibiscus flowers are emerging as very competitive targets for phytochemical studies, very little is known about their volatile composition and or aroma, such knowledge can be suspected to be relevant for understanding its olfactory and taste properties. To provide insight into Hibiscus flower aroma composition and for its future use in food and or pharmaceutical industry, volatile constituents from 2 cultivars grown in Egypt, viz. Aswan and Sudan-1 were profiled using solid-phase microextraction (SPME) coupled to GCMS. A total of 104 volatiles were identified with sugar and fatty acid derived volatiles amounting for the major volatile classes. To reveal for cultivar effect on volatile composition in an untargeted manner, multivariate data analysis was applied. Orthogonal projection to latent structures-discriminant analysis (OPLS-DA) revealed for 1-octen-3-ol versus furfural/acetic acid enrichment in Aswan and Sudan-1 cvs., respectively. Primary metabolites contributing to roselle taste and nutritional value viz. sugars and organic acids were profiled using GC-MS after silylation. The impact of probiotic bacteria on roselle infusion aroma profile was further assessed and revealed for the increase in furfural production with Lactobacillus plantarum inoculation and without affecting its anthocyanin content. This study provides the most complete map for volatiles, sugars and organic acids distribution in two Hibiscus flower cultivars and its fermented product. Copyright © 2015 Elsevier Ltd. All rights reserved.

  19. [Characteristics of Cannabis sativa L.: seed morphology, germination and growth characteristics, and distinction from Hibiscus cannabinus L].

    Science.gov (United States)

    Yoshimatsu, Kayo; Kitazawa, Takashi; Kawano, Noriaki; Iida, Osamu; Kawahara, Nobuo

    2010-02-01

    Illegal cannabis (Cannabis sativa L.) cultivation is still a social problem worldwide. Fifty inquiries on cannabis that Research Center for Medicinal Plant Resources (Tsukuba Division) received between January 1, 2000 and March 31, 2009 were itemized in to 8 categories; 1: seed identification, 2: plant identification, 3: indoor cultivation, 4: outdoor cultivation, 5: germination and growth characteristics, 6: expected amount of cannabis products derived from illegal cannabis plant, 7: non-narcotic cannabis and 8: usage of medicinal cannabis. Top three inquiries were 1: seed identification (16 cases), 3: indoor cultivation (10 cases) and 4: outdoor cultivation (6 cases). Characteristics of cannabis, namely seed morphology, germination and growth characteristics, and distinction from kenaf (Hibiscus cannabinus L.) that is frequently misjudged as cannabis, were studied to contribute for prevention of illegal cannabis cultivation.

  20. ‘Hapa White’, 'Hapa Pink', and 'Hapa Red' interspecific hybrid hibiscus cultivars

    Science.gov (United States)

    Hibiscus mutabilis, also known as confederate rose, is native to southeastern China, but it is also grown as an ornamental throughout the southeastern United States and is hardy in USDA zone 7 to 9. It is popular for its large, soft, gray-green foliage during the summer, and large, showy flowers pro...

  1. The Internet School of Medicine: use of electronic resources by medical trainees and the reliability of those resources.

    Science.gov (United States)

    Egle, Jonathan P; Smeenge, David M; Kassem, Kamal M; Mittal, Vijay K

    2015-01-01

    Electronic sources of medical information are plentiful, and numerous studies have demonstrated the use of the Internet by patients and the variable reliability of these sources. Studies have investigated neither the use of web-based resources by residents, nor the reliability of the information available on these websites. A web-based survey was distributed to surgical residents in Michigan and third- and fourth-year medical students at an American allopathic and osteopathic medical school and a Caribbean allopathic school regarding their preferred sources of medical information in various situations. A set of 254 queries simulating those faced by medical trainees on rounds, on a written examination, or during patient care was developed. The top 5 electronic resources cited by the trainees were evaluated for their ability to answer these questions accurately, using standard textbooks as the point of reference. The respondents reported a wide variety of overall preferred resources. Most of the 73 responding medical trainees favored textbooks or board review books for prolonged studying, but electronic resources are frequently used for quick studying, clinical decision-making questions, and medication queries. The most commonly used electronic resources were UpToDate, Google, Medscape, Wikipedia, and Epocrates. UpToDate and Epocrates had the highest percentage of correct answers (47%) and Wikipedia had the lowest (26%). Epocrates also had the highest percentage of wrong answers (30%), whereas Google had the lowest percentage (18%). All resources had a significant number of questions that they were unable to answer. Though hardcopy books have not been completely replaced by electronic resources, more than half of medical students and nearly half of residents prefer web-based sources of information. For quick questions and studying, both groups prefer Internet sources. However, the most commonly used electronic resources fail to answer clinical queries more than half

  2. Composition of the seed oil of Hibiscus abelmoschus L. (Malvaceae) growing in Vietnam

    NARCIS (Netherlands)

    Dung, N.X.; Khien, P.V.; Nhuan, D.D.; Hoi, T.M.; Ban, N.K.; Leclercq, P.A.; Muselli, A.; Bighelli, A.; Casanova, J.

    1999-01-01

    The essential oils of ambrette (Hibiscus abelmoschus 1., syn. Abelmoschus moschatus) were produced from seeds collected in the different provinces of Vietnam. Five samples were investigated and 35 components were identified by a combination of high resolution GC, GC/MS and 13C-NMR spectrometry. The

  3. Hibiscus sabdariffa (Roselle) Extracts and Wine: Phytochemical Profile, Physicochemical Properties, and Carbohydrase Inhibition.

    Science.gov (United States)

    Ifie, Idolo; Marshall, Lisa J; Ho, Peter; Williamson, Gary

    2016-06-22

    Three varieties of Hibiscus sabdariffa were analyzed for their phytochemical content and inhibitory potential on carbohydrate-digesting enzymes as a basis for selecting a variety for wine production. The dark red variety was chosen as it was highest in phenolic content and an aqueous extract partially inhibited α-glucosidase (maltase), with delphinidin 3-O-sambubioside, cyanidin 3-O-sambubioside, and 3-O-caffeoylquinic acid accounting for 65% of this activity. None of the varieties significantly inhibited α-amylase. Regarding Hibiscus sabdariffa wine, the effect of fermentation temperature (20 and 30 °C) on the physicochemical, phytochemical, and aroma composition was monitored over 40 days. The main change in phytochemical composition observed was the hydrolysis of 3-O-caffeolquinic acid and the concomitant increase of caffeic acid irrespective of fermentation temperature. Wine fermented at 20 °C was slightly more active for α-glucosidase inhibition with more fruity aromas (ethyl octanoate), but there were more flowery notes (2-phenylethanol) at 30 °C.

  4. INHIBITION OF HUMAN LOW-DENSITY LIPOPROTEINS OXIDATION BY Hibiscus radiatus CUV. CALYCES EXTRACT

    Directory of Open Access Journals (Sweden)

    Hernawan Hernawan

    2010-06-01

    Full Text Available Hibiscus radiatus Cuv calyces extracts rich in polyphenols was screened for their potential to inhibit oxidation of human low-density lipoproteins-cholesterol (LDL-C in vitro. The inhibition of LDL-C oxidation (antioxidant activity was determined by measuring the formation of conjugated dienes and thiobarbituric acid reagent substances (TBARS. LDL-C oxidation was carried out in the presence of H. radiatus Cuv calyces extract (20 and 50 μM. CuSO4 (10 μM was used as the oxidation initiator and  butylated hydroxytoluene (BHT at 50 μM was used as standard antioxidant. The protective effect of H. radiatus Cuv. calyces extract toward human low-density lipoproteins, complex lipid system was  demonstrated by significant increase lag time (> 103 min, diminished of the propagation rate (44 %, and diminution of conjugated dienes formation 59.42 % (50 μM compared to control.   Keywords: antioxidant, conjugated dienes, Hibiscus radiatus Cuv, low-density lipoproteins-cholesterol

  5. Biosynthesis, characterisation and antimicrobial activity of silver nanoparticles using Hibiscus rosa-sinensis petals extracts.

    Science.gov (United States)

    Nayak, Debasis; Ashe, Sarbani; Rauta, Pradipta Ranjan; Nayak, Bismita

    2015-10-01

    Green synthesis of metallic nanoparticles has lured the world from the chemical and physical approaches owing to its rapid, non-hazardous and economic aspect of production mechanism. In this study, silver nanoparticles (AgNPs) were synthesised using petal extracts of Hibiscus rosa-sinensis. The AgNPs displayed characteristic surface plasmon resonance peak at around 421 nm having a mean particle size of 76.25±0.17 nm and carried a charge of -41±0.2 mV. The X-ray diffraction patterns displayed typical peaks of face centred cubic crystalline silver. The surface morphology was characterised by scanning electron microscopy and atomic force microscopy. Fourier transform infrared spectroscopy studies confirmed the surface modifications of the functional groups for the synthesis of AgNPs. Furthermore, the synthesised AgNPs displayed proficient antimicrobial activity against pathogenic strains of Vibrio cholerae, Escherichia coli, Klebsiella pneumoniae and Staphylococcus aureus.

  6. Preparative isolation and purification of seven compounds from Hibiscus mutabilis L. leaves by two-step high-speed counter-current chromatography

    Directory of Open Access Journals (Sweden)

    Hou Zhuoni

    2015-01-01

    Full Text Available Seven compounds from Hibiscus mutabilis L. leaves were first successfully achieved by two-step high-speed counter-current chromatography with two-phase solvent system composed of n-butanol-ethyl acetate-water (1:6:9, v/v/v and n-hexane-ethyl acetate-methanol-water (3:5:3:5, v/v/v/v/. The critical experimental parameters of first-step separation were optimized with response surface methodology as follows: flow rate was 1.1 mL/min, revolution speed was 800 rpm and temperature was 30°C. Under the optimal conditions, around 5.0 mg of salicylic acid, 13.6 mg of rutin, 5.5 mg of genistein were obtained in 100 mg crude sample. Then, 9.2 mg of potengriffioside A, 4.7 mg of kaempferol 3-O-rutinoside, 3.0 mg of steppogenin and 2.5 mg of emodin were obtained by second-step separation. The purities of the seven compounds determined by UPLC were 96.2%, 93.8%, 95.4%, 94.3%, 98.0%, 94.1% and 90.8%, respectively. Their chemical structures were identified by electron spray ionization mass spectroscopy (ESI-MS and 1H, 13C nuclear magnetic resonance (NMR. Furthermore, compound steppogenin and genistein were first reported from Hibiscus mutabilis L. The purification method was simple, efficient and evaded tedious separation process.

  7. Antidepressant-like effects of methanol extract of Hibiscus tiliaceus flowers in mice

    Science.gov (United States)

    2012-01-01

    Background Hibiscus tiliaceus L. (Malvaceae) is used in postpartum disorders. Our purpose was to examine the antidepressant, anxiolytic and sedative actions of the methanol extract of H. tiliaceus flowers using animal models. Methods Adult male Swiss albino mice were treated with saline, standard drugs or methanol extract of H. tiliaceus and then subjected to behavioral tests. The forced swimming and tail suspension tests were used as predictive animal models of antidepressant activity, where the time of immobility was considered. The animals were submitted to the elevated plus-maze and ketamine-induced sleeping time to assess anxiolytic and sedative activities, respectively. Results Methanol extract of H. tiliaceus significantly decreased the duration of immobility in both animal models of antidepressant activity, forced swimming and tail suspension tests. This extract did not potentiate the effect of ketamine-induced hypnosis, as determined by the time to onset and duration of sleeping time. Conclusion Our results indicate an antidepressant-like profile of action for the extract of Hibiscus tiliaceus without sedative side effect. PMID:22494845

  8. Antidepressant-like effects of methanol extract of Hibiscus tiliaceus flowers in mice

    Directory of Open Access Journals (Sweden)

    Vanzella Cláudia

    2012-04-01

    Full Text Available Abstract Background Hibiscus tiliaceus L. (Malvaceae is used in postpartum disorders. Our purpose was to examine the antidepressant, anxiolytic and sedative actions of the methanol extract of H. tiliaceus flowers using animal models. Methods Adult male Swiss albino mice were treated with saline, standard drugs or methanol extract of H. tiliaceus and then subjected to behavioral tests. The forced swimming and tail suspension tests were used as predictive animal models of antidepressant activity, where the time of immobility was considered. The animals were submitted to the elevated plus-maze and ketamine-induced sleeping time to assess anxiolytic and sedative activities, respectively. Results Methanol extract of H. tiliaceus significantly decreased the duration of immobility in both animal models of antidepressant activity, forced swimming and tail suspension tests. This extract did not potentiate the effect of ketamine-induced hypnosis, as determined by the time to onset and duration of sleeping time. Conclusion Our results indicate an antidepressant-like profile of action for the extract of Hibiscus tiliaceus without sedative side effect.

  9. Permeability Study of Polyphenols Derived from a Phenolic-Enriched Hibiscus sabdariffa Extract by UHPLC-ESI-UHR-Qq-TOF-MS

    Science.gov (United States)

    Borrás-Linares, Isabel; Herranz-López, María; Barrajón-Catalán, Enrique; Arráez-Román, David; González-Álvarez, Isabel; Bermejo, Marival; Gutiérrez, Alberto Fernández; Micol, Vicente; Segura-Carretero, Antonio

    2015-01-01

    Previous findings on the capacity of Hibiscus sabdariffa (HS) polyphenols to ameliorate metabolic disturbances justify the necessity of studies oriented to find the potential metabolites responsible for such an effect. The present study examined the intestinal epithelial membrane permeability of polyphenols present in a phenolic-enriched Hibiscus sabdariffa extract (PEHS), free and encapsulated, using the Caco-2 cell line. Additionally, selected polyphenols (quercetin, quercetin-3-glucoside, quercetin-3-glucuronide, and N-feruloyltyramine) were also studied in the same absorption model. The powerful analytical platform used ultra-high-performance liquid chromatography coupled with ultra-high-resolution quadrupole time-of-flight mass spectrometry (UHPLC-ESI-UHR-Qq-TOF-MS), and enabled the characterization of seven new compounds in PEHS. In the permeation study, only a few compounds were able to cross the cell monolayer and the permeability was lower when the extract was in an encapsulated form. Pure compounds showed a moderate absorption in all cases. Nevertheless, these preliminary results may need further research to understand the complete absorption mechanism of Hibiscus polyphenols. PMID:26262611

  10. Permeability Study of Polyphenols Derived from a Phenolic-Enriched Hibiscus sabdariffa Extract by UHPLC-ESI-UHR-Qq-TOF-MS

    Directory of Open Access Journals (Sweden)

    Isabel Borrás-Linares

    2015-08-01

    Full Text Available Previous findings on the capacity of Hibiscus sabdariffa (HS polyphenols to ameliorate metabolic disturbances justify the necessity of studies oriented to find the potential metabolites responsible for such an effect. The present study examined the intestinal epithelial membrane permeability of polyphenols present in a phenolic-enriched Hibiscus sabdariffa extract (PEHS, free and encapsulated, using the Caco-2 cell line. Additionally, selected polyphenols (quercetin, quercetin-3-glucoside, quercetin-3-glucuronide, and N-feruloyltyramine were also studied in the same absorption model. The powerful analytical platform used ultra-high-performance liquid chromatography coupled with ultra-high-resolution quadrupole time-of-flight mass spectrometry (UHPLC-ESI-UHR-Qq-TOF-MS, and enabled the characterization of seven new compounds in PEHS. In the permeation study, only a few compounds were able to cross the cell monolayer and the permeability was lower when the extract was in an encapsulated form. Pure compounds showed a moderate absorption in all cases. Nevertheless, these preliminary results may need further research to understand the complete absorption mechanism of Hibiscus polyphenols.

  11. Permeability Study of Polyphenols Derived from a Phenolic-Enriched Hibiscus sabdariffa Extract by UHPLC-ESI-UHR-Qq-TOF-MS.

    Science.gov (United States)

    Borrás-Linares, Isabel; Herranz-López, María; Barrajón-Catalán, Enrique; Arráez-Román, David; González-Álvarez, Isabel; Bermejo, Marival; Fernández Gutiérrez, Alberto; Micol, Vicente; Segura-Carretero, Antonio

    2015-08-07

    Previous findings on the capacity of Hibiscus sabdariffa (HS) polyphenols to ameliorate metabolic disturbances justify the necessity of studies oriented to find the potential metabolites responsible for such an effect. The present study examined the intestinal epithelial membrane permeability of polyphenols present in a phenolic-enriched Hibiscus sabdariffa extract (PEHS), free and encapsulated, using the Caco-2 cell line. Additionally, selected polyphenols (quercetin, quercetin-3-glucoside, quercetin-3-glucuronide, and N-feruloyltyramine) were also studied in the same absorption model. The powerful analytical platform used ultra-high-performance liquid chromatography coupled with ultra-high-resolution quadrupole time-of-flight mass spectrometry (UHPLC-ESI-UHR-Qq-TOF-MS), and enabled the characterization of seven new compounds in PEHS. In the permeation study, only a few compounds were able to cross the cell monolayer and the permeability was lower when the extract was in an encapsulated form. Pure compounds showed a moderate absorption in all cases. Nevertheless, these preliminary results may need further research to understand the complete absorption mechanism of Hibiscus polyphenols.

  12. ANALYTICAL REVIEW OF ELECTRONIC RESOURCES FOR THE STUDY OF LATIN

    Directory of Open Access Journals (Sweden)

    Olena Yu. Balalaieva

    2014-04-01

    Full Text Available The article investigates the current state of development of e-learning content in the Latin language. It is noted that the introduction of ICT in the educational space has expanded the possibility of studying Latin, opened access to digital libraries resources, made it possible to use scientific and educational potential and teaching Latin best practices of world's leading universities. A review of foreign and Ukrainian information resources and electronic editions for the study of Latin is given. Much attention was paid to the didactic potential of local and online multimedia courses of Latin, electronic textbooks, workbooks of interactive tests and exercises, various dictionaries and software translators, databases and digital libraries. Based on analysis of the world market of educational services and products the main trends in the development of information resources and electronic books are examined. It was found that multimedia courses with interactive exercises or workbooks with interactive tests, online dictionaries and translators are the most widely represented and demanded. The noticeable lagging of Ukrainian education and computer linguistics in quantitative and qualitative measures in this industry is established. The obvious drawback of existing Ukrainian resources and electronic editions for the study of Latin is their noninteractive nature. The prospects of e-learning content in Latin in Ukraine are outlined.

  13. Extraction of lipid components from hibiscus seeds by supercritical carbon dioxide and ethanol mixtures

    Energy Technology Data Exchange (ETDEWEB)

    Holser, Ronald A.; King, J. W. (Jerry W.); Bost, G.

    2002-01-01

    The genus Hibiscus exhibits great diversity in the production of natural materials with edible and industrial applications. The seeds of twelve varieties of Hibiscus were investigated as a source for triglycerides and phospholipids that could be used in functional foods. Lipid components were extracted from seed samples ground to a nominal particle diameter of 0.1 mm. Extractions were performed with an ISCO model 3560 supercritical fluid extractor using carbon dioxide and a mixture of carbon dioxide modified with ethanol. The neutral lipids were extracted with carbon dioxide at 80 C and 5370 MPa for 45 min. Polar lipids were subsequently extracted with a mixture of carbon dioxide and 15% ethanol at the same temperature and pressure. High performance liquid chromatography (HPLC) was used to analyze extracts for major neutral and polar lipid classes. A silica column was used with a solvent gradient of hexane/isopropanol/ water and ultraviolet (UV) and evaporative light scattering detectors (ELSD). An aliquot of each triglyceride fraction was trans-methylated with sodium methoxide and analyzed by gas chromatography to obtain the corresponding fatty acid methyl esters. The total lipids extracted ranged from 8.5% for a variety indigenous to Madagascar (H. calyphyllus) to 20% for a hybrid species (Georgia Rose). The average oil yield was 11.4% for the other varieties tested. The fatty acid methyl ester analysis displayed a high degree of unsaturation for all varieties tested, e. g., 75 ' 83%. Oleic, linoleic, and linolenic fatty acids were the predominate unsaturated fatty acids with only minor amounts of C14, C18, and C20 saturated fatty acids measured. Palmitic acid was identified as the predominate saturated fatty acid. The distribution of the major phospholipids, i. e., phosphatidylethanolamine, phosphatidic acid, phosphatidylserine, phosphatidylcholine, and lysophosphatidylcholine, was found to vary significantly among the hibiscus species examined

  14. Elektronik Bilgi Kaynaklarının Seçimi / Selection of Electronic Information Resources

    Directory of Open Access Journals (Sweden)

    Pınar Al

    2003-04-01

    Full Text Available For many years, library users have used only from the printed media in order to get the information that they have needed. Today with the widespread use of the Web and the addition of electronic information resources to library collections, the use of information in the electronic environment as well as in printed media is started to be used. In time, such types of information resources as, electronic journals, electronic books, electronic encyclopedias, electronic dictionaries and electronic theses have been added to library collections. In this study, selection criteria that can be used for electronic information resources are discussed and suggestions are provided for libraries that try to select electronic information resources for their collections.

  15. The complete chloroplast genome sequence of Hibiscus syriacus.

    Science.gov (United States)

    Kwon, Hae-Yun; Kim, Joon-Hyeok; Kim, Sea-Hyun; Park, Ji-Min; Lee, Hyoshin

    2016-09-01

    The complete chloroplast genome sequence of Hibiscus syriacus L. is presented in this study. The genome is composed of 161 019 bp in length, with a typical circular structure containing a pair of inverted repeats of 25 745 bp of length separated by a large single-copy region and a small single-copy region of 89 698 bp and 19 831 bp of length, respectively. The overall GC content is 36.8%. One hundred and fourteen genes were annotated, including 81 protein-coding genes, 4 ribosomal RNA genes and 29 transfer RNA genes.

  16. Access to electronic resources by visually impaired people

    Directory of Open Access Journals (Sweden)

    Jenny Craven

    2003-01-01

    Full Text Available Research into access to electronic resources by visually impaired people undertaken by the Centre for Research in Library and Information Management has not only explored the accessibility of websites and levels of awareness in providing websites that adhere to design for all principles, but has sought to enhance understanding of information seeking behaviour of blind and visually impaired people when using digital resources.

  17. Library training to promote electronic resource usage

    DEFF Research Database (Denmark)

    Frandsen, Tove Faber; Tibyampansha, Dativa; Ibrahim, Glory

    2017-01-01

    Purpose: Increasing the usage of electronic resources is an issue of concern for many libraries all over the world. Several studies stress the importance of information literacy and instruction in order to increase the usage. Design/methodology/approach: The present article presents the results...

  18. Pengaruh Periode Panen Terhadap Viabilitas Benih Rosela (Hibiscus sabdariffa L.)

    OpenAIRE

    Pulungan, Dedes Mayang Sari

    2016-01-01

    Rosella has a harvest period that does not simultaneously or concurrently so that harvesting done gradually. This research aimed to determine the effect of harvest on seed viability period of roselle (Hibiscus sabdariffa L.).Conducted in the experimental field of the Faculty of Agriculture, University of North Sumatra which were ± 25 meters above sea level and continued in Seed Technology Laboratory of the Faculty of Agriculture, University of North Sumatra from February to June 2013, using r...

  19. Why and How to Measure the Use of Electronic Resources

    Directory of Open Access Journals (Sweden)

    Jean Bernon

    2008-11-01

    Full Text Available A complete overview of library activity implies a complete and reliable measurement of the use of both electronic resources and printed materials. This measurement is based on three sets of definitions: document types, use types and user types. There is a common model of definitions for printed materials, but a lot of questions and technical issues remain for electronic resources. In 2006 a French national working group studied these questions. It relied on the COUNTER standard, but found it insufficient and pointed out the need for local tools such as web markers and deep analysis of proxy logs. Within the French national consortium COUPERIN, a new working group is testing ERMS, SUSHI standards, Shibboleth authentication, along with COUNTER standards, to improve the counting of the electronic resources use. At this stage this counting is insufficient and its improvement will be a European challenge for the future.

  20. ffect of Nitrogen and Zinc Foliar Application on Quantitative Traits of Tea Rosslle (Hibiscus sabdariffa in Jiroft Zone

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    abdolreza raisi sarbijan

    2017-02-01

    Full Text Available Introduction: Nitrogen is an essential element forplants and in combination withelements such as carbon, oxygen, hydrogen and sulfur results ineven more valuable materials such as amino acids, nucleic acids, alkaloids. Hibiscus tea (Hibiscus sabdariffa from Malvaceaefamily is known by different names in different parts of the world. In Iran it is calledthe Maki tea, tea Meccaorred tea.As an important plant,it is decided to investigate its growth and development in Jiroft. Materials and Methods The experiment was conducted as factorial based on randomized complete block design with three replications in farm research of Islamic Azad University of Jiroft during 2010. The first factor was nitrogen foliar application in four levels (0, 1, 2 and 3 percent and second factor was foliar application of zinc at twolevels (0 and 1 percent. The measured quantitative characteristics were stem diameter, plant height, calycle fresh weight,calycle dry weight, plant fresh weight,plant dry weight, leaf fresh weight,leaf dry weight, mucilage percentage and mucilage yield. Results and Discussion:The results of ANOVA showed that nitrogen foliar application on leaf dry weight, calycle fresh and dry weight was effective. Plant fresh weight, dry weight, stem diameter, plant height, mucilage percentageandmucilage yield showedsignificanteffects. Zinc foliar application significantly affected leaf fresh weight,leafdry weight, calycle fresh weight, plant fresh weight,plant dry weight, mucilage percentage andmucilage yield.The interaction effect of nitrogen and zinc on leaf dry weight, plant freshweight and plant dry weight was also significant. The mean comparison of studied characteristics revealed that byincreasing the amount of nitrogen up to N2 level, the stem diameter, plant height, leaf dry weight, calycle dry weight, mucilage percentage and yield increased but there was no significant difference between N2 and N3 levels. Plant fresh weight and plantdry weight

  1. Kombucha Rosella (Hibiscus sabdariffa Linn) dan Kemampuannya sebagai Antihiperkolesterolemia

    OpenAIRE

    Suhartatik, Nanik; Karyantina, Merkuria; Purwanti, Indrias Tri

    2012-01-01

    We know that there is another tea extract, e.i from calyx of roselle flower (Hibiscus sabdariffa Linn). This kind of tea could be made became kombucha by ferment roselle extract using microbe in the fermentation of kombucha. This mi­ crobe grown in roselle extract as a medium with variety of roselle concentration (30; 40; 50 grams of dried roselle/L). During the fermentation process, roselle kombucha was analyzed for pH value, total acid, antioxidant activity at 0, 1, 3, 5, 7, 10 days of ferm...

  2. Aqueous Extracts of Hibiscus sabdariffa Calyces Decrease Hepatitis A Virus and Human Norovirus Surrogate Titers.

    Science.gov (United States)

    Joshi, Snehal S; Dice, Lezlee; D'Souza, Doris H

    2015-12-01

    Hibiscus sabdariffa extract is known to have antioxidant, anti-diabetic, and antimicrobial properties. However, their effects against foodborne viruses are currently unknown. The objective of this study was to determine the antiviral effects of aqueous extracts of H. sabdariffa against human norovirus surrogates (feline calicivirus (FCV-F9) and murine norovirus (MNV-1)) and hepatitis A virus (HAV) at 37 °C over 24 h. Individual viruses (~5 log PFU/ml) were incubated with 40 or 100 mg/ml of aqueous hibiscus extract (HE; pH 3.6), protocatechuic acid (PCA; 3 or 6 mg/ml, pH 3.6), ferulic acid (FA; 0.5 or 1 mg/ml; pH 4.0), malic acid (10 mM; pH 3.0), or phosphate buffered saline (pH 7.2 as control) at 37 °C over 24 h. Each treatment was replicated thrice and plaque assayed in duplicate. FCV-F9 titers were reduced to undetectable levels after 15 min with both 40 and 100 mg/ml HE. MNV-1 was reduced by 1.77 ± 0.10 and 1.88 ± 0.12 log PFU/ml after 6 h with 40 and 100 mg/ml HE, respectively, and to undetectable levels after 24 h by both concentrations. HAV was reduced to undetectable levels by both HE concentrations after 24 h. PCA at 3 mg/ml reduced FCV-F9 titers to undetectable levels after 6 h, MNV-1 by 0.53 ± 0.01 log PFU/ml after 6 h, and caused no significant change in HAV titers. FA reduced FCV-F9 to undetectable levels after 3 h and MNV-1 and HAV after 24 h. Transmission electron microscopy showed no conclusive results. The findings suggest that H. sabdariffa extracts have potential to prevent foodborne viral transmission.

  3. Disruption of Angiogenesis by Anthocyanin-Rich Extracts of Hibiscus sabdariffa

    Science.gov (United States)

    Joshua, Madu; Okere, Christiana; Sylvester, O’Donnell; Yahaya, Muhammad; Precious, Omale; Dluya, Thagriki; Um, Ji-Yeon; Neksumi, Musa; Boyd, Jessica; Vincent-Tyndall, Jennifer; Choo, Dong-Won; Gutsaeva, Diana R.; Jahng, Wan Jin

    2017-01-01

    Abnormal vessel formations contribute to the progression of specific angiogenic diseases including age-related macular degeneration. Adequate vessel growth and maintenance represent the coordinated process of endothelial cell proliferation, matrix remodeling, and differentiation. However, the molecular mechanism of the proper balance between angiogenic activators and inhibitors remains elusive. In addition, quantitative analysis of vessel formation has been challenging due to complex angiogenic morphology. We hypothesized that conjugated double bond containing-natural products, including anthocyanin extracts from Hibiscus sabdariffa, may control the proper angiogenesis. The current study was designed to determine whether natural molecules from African plant library modulate angiogenesis. Further, we questioned how the proper balance of anti- or pro-angiogenic signaling can be obtained in the vascular microenvironment by treating anthocyanin or fatty acids using chick chorioallantoic membrane angiogenesis model in ovo. The angiogenic morphology was analyzed systematically by measuring twenty one angiogenic indexes using Angiogenic Analyzer software. Chick chorioallantoic model demonstrated that anthocyanin-rich extracts inhibited angiogenesis in time- and concentration-dependent manner. Molecular modeling analysis proposed that hibiscetin as a component in Hibiscus may bind to the active site of vascular endothelial growth factor receptor 2 (VEGFR2) with ΔG= −8.42 kcal/mol of binding energy. Our results provided the evidence that anthocyanin is an angiogenic modulator that can be used to treat uncontrolled neovascular-related diseases, including age-related macular degeneration. PMID:28459020

  4. Dietary fiber content and associated antioxidant compounds in Roselle flower (Hibiscus sabdariffa L.) beverage.

    Science.gov (United States)

    Sáyago-Ayerdi, Sonia G; Arranz, Sara; Serrano, José; Goñi, Isabel

    2007-09-19

    The beverage of Hibiscus sabdariffa flowers is widely consumed in Mexico. Polyphenols contained in plant foods are frequently associated with dietary fiber. The aim of this work is to quantify the dietary fiber, associated polyphenols, and antioxidant capacity of the Roselle flower and the beverage traditionally prepared from it and its contribution to the Mexican diet. Roselle flower contained dietary fiber as the largest component (33.9%) and was rich in phenolic compounds (6.13%). Soluble dietary fiber was 0.66 g/L in beverage, and 66% of total extractable polyphenols contained in Roselle flower passed to the beverage and showed an antioxidant capacity of 335 micromoL trolox equivalents/100 mL beverage measured by ABTS. These data suggest that Roselle flower beverage intake in the Mexican diet may contribute around 166 and 165 mg/per serving to the intake of dietary fiber and polyphenols, respectively. The health benefits from consumption of Hibiscus beverage could be of considerable benefit to the whole population.

  5. THE ANTIBACTERIAL EFFECT OF ROSELLE (HIBISCUS SABDARIFFA EXTRACT AGAINST STAPHYLOCOCCUS EPIDERMIDIS IN VITRO

    Directory of Open Access Journals (Sweden)

    Terrence Timothy Evan Lusida

    2017-04-01

    Full Text Available Infection of Staphylococcus epidermidis is still a common problem in many hospitals. Factor determining biofilm formation makes it harder for atibiotics to cure the infection. Roselle (Hibiscus sabdariffa, a well known traditional medicine plant, is a potential candidate as a drug againts infectious disease. The purpose of this research is to investigate the antibacterial effect of ethanol extract from Roselle (Hibiscus sabdariffa calyx againts the growth of Staphylococcus epidermidis. Assessment for antibacterial effect is performed using broth diffusion method. The extract is made by maceration of the calyx of Roselle in 96% ethanol. Extracts with concentration of 125, 62.5, 31.25, 15.63, 7.81, 3.90, 1.95, 0.97, 0.48, 0.24 mg/mL are added into separated Mueller-Hinton broths (MHB, which have already been inoculated by Staphylococcus epidermidis. As for bacterial growth control, we used MHB with bacterial inoculation, while sterility control we used mixture of extract and MHB. Then from each broth, the solutions are added into separated nutrition agar plates. Replications are done three times. Clarity and bacterial growth are observed after 24 hours of incubation. However, clarity cannot be observed in 36 broth, but bacterial growth is observed on the plate for concentration 0.97, 0.48, and 0.24 mg/mL. Therefore Minimum inhibitory concentration (MIC cannot be determined because the extract’s color interfere the observation. While minimum bactericidal concentration (MBC, the last concentration before the concentration where the bacteria are still viable, is 1.95 mg/mL. Based on the result of the research, the Roselle calyx ethanol extract (Hibiscus sabdariffa through dilution method with a concentration of 1.95 mg / mL can kill Staphylococcus epidermidis and in order to find MIC in collored and turbid solution (before being incubated in incubator, we can consider using agar dilution methode or microdilution methode.

  6. Anabolic effect of Hibiscus rosasinensis Linn. leaf extracts in immature albino male rats.

    Science.gov (United States)

    Olagbende-Dada, S O; Ezeobika, E N; Duru, F I

    2007-01-01

    Many plants remedies have been employed in solving man's health needs especially the nutritive value which enhances health living. Aphrodisiac plants are plants with anabolic properties i.e. they help in protein synthesis and enhances sexual abilities in males. They are also known as androgenic plants because their properties are similar to that of androgen a male hormone. Cold aqueous extract of Hibiscus rosasinensis leaves is reported by local traditional practioners in Western Nigeria to be aphrodisiac. To investigate the anabolic properties of Hibiscus rosasinensis. Three groups (8/group) of immature male rats of known weights were administered equal doses of aqueous (cold and hot) and alcoholic extracts of Hibiscus rosasinensis leaves for 8 weeks. The gain in body and isolated sexual organs (testis, epididymis, seminal vesicle and prostate) weights were determined after treatment and compared to the value obtained from a fourth untreated group which served as the control. Section through the testes of both the treated and untreated rats were also examined microscopically and displayed as a photomicrograph for comparism. All data were statistically analysed and displaced in graphic form. Over the 8 weeks of treatment, the control, the cold aqueous extract dosed, hot aqueous extract dosed and alcoholic extract dosed rats gained 8%, 15%, 18% and 22% in body weights respectively. The increase in the weight of testis, epididymis, seminal vesicle and prostate of the alcoholic extract dosed rats was 19%, 30%, 31% and 40% respectively. The anabolic effect of the leaf extracts of H. rosasinensis is hereby established. More work needs to be done on these leaf extracts to know their effect on the gonadotrophin hormones which regulate the activity of the androgens in relation to spermatogenesis.

  7. Euler European Libraries and Electronic Resources in Mathematical Sciences

    CERN Document Server

    The Euler Project. Karlsruhe

    The European Libraries and Electronic Resources (EULER) Project in Mathematical Sciences provides the EulerService site for searching out "mathematical resources such as books, pre-prints, web-pages, abstracts, proceedings, serials, technical reports preprints) and NetLab (for Internet resources), this outstanding engine is capable of simple, full, and refined searches. It also offers a browse option, which responds to entries in the author, keyword, and title fields. Further information about the Project is provided at the EULER homepage.

  8. Bioclimatic Thresholds, Thermal Constants and Survival of Mealybug, Phenacoccus solenopsis (Hemiptera: Pseudococcidae) in Response to Constant Temperatures on Hibiscus

    Science.gov (United States)

    Sreedevi, Gudapati; Prasad, Yenumula Gerard; Prabhakar, Mathyam; Rao, Gubbala Ramachandra; Vennila, Sengottaiyan; Venkateswarlu, Bandi

    2013-01-01

    Temperature-driven development and survival rates of the mealybug, Phenacoccussolenopsis Tinsley (Hemiptera: Pseudococcidae) were examined at nine constant temperatures (15, 20, 25, 27, 30, 32, 35 and 40°C) on hibiscus ( Hibiscus rosa -sinensis L.). Crawlers successfully completed development to adult stage between 15 and 35°C, although their survival was affected at low temperatures. Two linear and four nonlinear models were fitted to describe developmental rates of P . solenopsis as a function of temperature, and for estimating thermal constants and bioclimatic thresholds (lower, optimum and upper temperature thresholds for development: Tmin, Topt and Tmax, respectively). Estimated thresholds between the two linear models were statistically similar. Ikemoto and Takai’s linear model permitted testing the equivalence of lower developmental thresholds for life stages of P . solenopsis reared on two hosts, hibiscus and cotton. Thermal constants required for completion of cumulative development of female and male nymphs and for the whole generation were significantly lower on hibiscus (222.2, 237.0, 308.6 degree-days, respectively) compared to cotton. Three nonlinear models performed better in describing the developmental rate for immature instars and cumulative life stages of female and male and for generation based on goodness-of-fit criteria. The simplified β type distribution function estimated Topt values closer to the observed maximum rates. Thermodynamic SSI model indicated no significant differences in the intrinsic optimum temperature estimates for different geographical populations of P . solenopsis . The estimated bioclimatic thresholds and the observed survival rates of P . solenopsis indicate the species to be high-temperature adaptive, and explained the field abundance of P . solenopsis on its host plants. PMID:24086597

  9. Effects of Electronic Information Resources Skills Training for Lecturers on Pedagogical Practices and Research Productivity

    Science.gov (United States)

    Bhukuvhani, Crispen; Chiparausha, Blessing; Zuvalinyenga, Dorcas

    2012-01-01

    Lecturers use various electronic resources at different frequencies. The university library's information literacy skills workshops and seminars are the main sources of knowledge of accessing electronic resources. The use of electronic resources can be said to have positively affected lecturers' pedagogical practices and their work in general. The…

  10. Hibiscus rosa sinensis Linn. Petals Modulates Glycogen Metabolism and Glucose Homeostasis Signalling Pathway in Streptozotocin-Induced Experimental Diabetes.

    Science.gov (United States)

    Pillai, Sneha S; Mini, S

    2016-03-01

    The prevalence of diabetes mellitus is becoming more and more serious and reaches epidemic proportions worldwide. Scientific research is constantly looking for new agents that could be used as dietary functional ingredients in the fight against diabetes. The objective of the present study was to evaluate the effect of ethyl acetate fraction of Hibiscus rosa sinensis Linn. petals on experimental diabetes at a dose of 25 mg/kg body weight and it was compared with standard anti-diabetic drug metformin. The elevated levels of serum glucose (398.56 ± 35.78) and glycated haemoglobin (12.89 ± 1.89) in diabetic rats were significantly decreased (156.89 ± 14.45 and 6.12 ± 0.49, respectively) by Hibiscus rosa sinensis petals (EHRS) administration. Hepatotoxicity marker enzyme levels in serum were normalized. The fraction supplementation restored the glycogen content by regulating the activities of glycogen metabolizing enzymes. It significantly modulated the expressions of marker genes involved in glucose homeostasis signalling pathway. Histopathological analysis of liver and pancreas supported our findings. The overall effect was comparable with metformin. Hence, our study reveals the role of hibiscus petals for alleviation of diabetes complications, thus it can be propagated as a nutraceutical agent.

  11. Effect of Hibiscus sabdariffa Calices on Dyslipidemia in Obese Adolescents: A Triple-masked Randomized Controlled Trial

    Science.gov (United States)

    Sabzghabaee, Ali Mohammad; Ataei, Ehsan; Kelishadi, Roya; Ghannadi, Alireza; Soltani, Rasool; Badri, Shirinsadat; Shirani, Shahin

    2013-01-01

    Conflict of interest: none declared. Objective We aimed to evaluate the effects of Hibiscus sabdariffa (HS) calices on controlling dyslipidemia in obese adolescents. Methodology In this triple blind randomized placebo-controlled clinical trial which was registered in the Iranian registry for clinical trials (IRCT201109122306N2), 90 obese adolescents aged 12-18 years with documented dyslipidemia were randomly assigned in two groups of cases who received 2 grams of fine powdered calices of Hibiscus sabdariffa per day for one month and controls who received placebo powder with the same dietary and physical activity recommendations and duration of exposure. Full lipid profile and fasting blood sugar measured before and after the trial. Data were analyzed using multivariate general linear model. Findings Overall, 72 participants (mean age of 14.21±1.6, 35 boys) completed the trial. The two arms of the study (cases and controls) were not statistically different in terms of age, gender, weight, body mass index (BMI) and lipid profile before the trial. Serum total cholesterol, low density lipoprotein cholesterol and serum triglyceride showed a significant decrease in cases group but high density lipoprotein cholesterol level was not changed significantly. Conclusion It is concluded that Hibiscus sabdariffa calyces powder may have significant positive effects on lipid profile of adolescents which maybe attributed to its polyphenolic and antioxidant content. Further studies are needed on dose-response and formulation optimization. PMID:24082826

  12. Effects of water extract of Hibiscus sabdariffa, Linn (Malvaceae) 'Roselle' on excretion of a diclofenac formulation.

    Science.gov (United States)

    Fakeye, T O; Adegoke, A O; Omoyeni, O C; Famakinde, A A

    2007-01-01

    The effect of beverages prepared from the dried calyx of the flowers of Hibiscus sabdariffa on the excretion of diclofenac was investigated using a controlled study in healthy human volunteers. A high pressure liquid chromatographic method was used to analyse the 8 h urine samples collected after the administration of diclofenac with 300 mL (equivalent to 8.18 mg anthocyanins) of the beverage administered daily for 3 days. An unpaired two-tailed t-test was used to analyse for significant difference observed in the amount of diclofenac excreted before and after administration of the beverage. There was a reduction in the amount of diclofenac excreted and the wide variability observed in the control with the water beverage of Hibiscus sabdariffa (p < 0.05). There is an increasing need to counsel patients against the use of plant beverages with drugs.

  13. Functional properties of roselle (Hibiscus sabdariffa L.) seed and its application as bakery product.

    Science.gov (United States)

    Nyam, Kar-Lin; Leao, Sod-Ying; Tan, Chin-Ping; Long, Kamariah

    2014-12-01

    Roselle (Hibiscus sabdariffa L.) seed is a valuable food resource as it has an excellent source of dietary fibre. Therefore, this study examined the functional properties of roselle seeds. Replacement of cookie flour with roselle seed powder at levels of 0-30 % was investigated for its effect on functional and nutritional properties of cookies. Among the four formulations cookies, the most preferred by panelists was 20 % roselle seed powder cookie (F3), followed by 10 % roselle seed powder cookie (F2) and 30 % roselle seed powder cookie (F4). The least preferred formulation among all was control cookie (F1). Cookie with 20 % roselle seed powder added showed higher content of total dietary fibre (5.6 g/100 g) as compared with control cookie (0.90 g/100 g). Besides that, cookies incorporated with roselle seed powder exhibited improved antioxidant properties. Thus, roselle seed powder can be used as a dietary fibre source and developed as a functional ingredient in food products.

  14. Electronic Commerce Resource Centers. An Industry--University Partnership.

    Science.gov (United States)

    Gulledge, Thomas R.; Sommer, Rainer; Tarimcilar, M. Murat

    1999-01-01

    Electronic Commerce Resource Centers focus on transferring emerging technologies to small businesses through university/industry partnerships. Successful implementation hinges on a strategic operating plan, creation of measurable value for customers, investment in customer-targeted training, and measurement of performance outputs. (SK)

  15. The South American species of Hibiscus sect. Furcaria DC. (Malvaceae-Hibisceae

    Directory of Open Access Journals (Sweden)

    Antonio Krapovickas

    2004-01-01

    Full Text Available The Hibiscus section Furcaria from South America is revised. Ten new species from Brasil are described: H. Andersonii, H. capitalensis, H. chapadensis, H. Gregoryi, H. Hochreutineri, H. itirapinensis, H. matogrossensis, H. Nanuzae, H. Saddii, H. Windischii, and a new one from Perú: H. Chancoae. Two new names are proposed: H. Hilarianus from Brasil and H. amambayensis from Paraguay. A key is provided to distinguish the 40 species of section Furcaria known from South America

  16. Chemical-sensory properties and consumer preference of hibiscus beverages produced by improved industrial processes.

    Science.gov (United States)

    Monteiro, Maria João P; Costa, Ana Isabel A; Fliedel, Geneviève; Cissé, Mady; Bechoff, Aurélie; Pallet, Dominique; Tomlins, Keith; Pintado, Maria Manuela E

    2017-06-15

    The need to increase sustainability and add value to traditional foods claiming health benefits led to the introduction of key improvements in the production of hibiscus beverages in Senegal. The physicochemical and sensory properties of three resulting products (an under-vacuum concentrate, a dilute-to-taste syrup and a ready-to-drink infusion) were assessed, vis-à-vis those of conventionally manufactured beverages, and their impact on local consumer preference determined (n=146). New beverages had more intense, redder colour and higher monomeric anthocyanin content, total phenolic content and antioxidant capacity. Moreover, their colour evaluations by trained panellists were mainly linked to colour density and anthocyanin/polyphenol content, while flavour assessments were associated to titratable acidity and sugar-to-acid ratio. Consumer evaluations, in turn, were driven by the beverages' red colour intensity, aroma strength and balance between sweetness and acidity. This explained why they overwhelmingly preferred the under-vacuum concentrate, regardless of their age, gender or frequency of hibiscus beverage consumption. Copyright © 2016 Elsevier Ltd. All rights reserved.

  17. A Single Chiroptical Spectroscopic Method May Not Be Able To Establish the Absolute Configurations of Diastereomers: Dimethylesters of Hibiscus and Garcinia Acids

    Science.gov (United States)

    Polavarapu, Prasad L.; Donahue, Emily A.; Shanmugam, Ganesh; Scalmani, Giovanni; Hawkins, Edward K.; Rizzo, Carmelo; Ibnusaud, Ibrahim; Thomas, Grace; Habel, Deenamma; Sebastian, Dellamol

    2013-01-01

    Electronic circular dichroism (ECD), optical rotatory dispersion (ORD), and vibrational circular dichroism (VCD) spectra of hibiscus acid dimethyl ester have been measured and analyzed in combination with quantum chemical calculations of corresponding spectra. These results, along with those reported previously for garcinia acid dimethyl ester, reveal that none of these three (ECD, ORD, or VCD) spectroscopic methods, in isolation, can unequivocally establish the absolute configurations of diastereomers. This deficiency is eliminated when a combined spectral analysis of either ECD and VCD or ORD and VCD methods is used. It is also found that the ambiguities in the assignment of absolute configurations of diastereomers may also be overcome when unpolarized vibrational absorption is included in the spectral analysis. PMID:21568330

  18. Hibiscus sabdariffa leaf polyphenolic extract induces human melanoma cell death, apoptosis, and autophagy.

    Science.gov (United States)

    Chiu, Chun-Tang; Hsuan, Shu-Wen; Lin, Hui-Hsuan; Hsu, Cheng-Chin; Chou, Fen-Pi; Chen, Jing-Hsien

    2015-03-01

    Melanoma is the least common but most fatal form of skin cancer. Previous studies have indicated that an aqueous extract of Hibiscus sabdariffa leaves possess hypoglycemic, hypolipidemic, and antioxidant effects. In this study, we want to investigate the anticancer activity of Hibiscus leaf polyphenolic (HLP) extract in melanoma cells. First, HLP was exhibited to be rich in epicatechin gallate (ECG) and other polyphenols. Apoptotic and autophagic activities of HLP and ECG were further evaluated by DAPI stain, cell-cycle analysis, and acidic vascular organelle (AVO) stain. Our results revealed that both HLP and ECG induced the caspases cleavages, Bcl-2 family proteins regulation, and Fas/FasL activation in A375 cells. In addition, we also revealed that the cells presented AVO-positive after HLP treatments. HLP could increase the expressions of autophagy-related proteins autophagy-related gene 5 (ATG5), Beclin1, and light chain 3-II (LC3-II), and induce autophagic cell death in A375 cells. These data indicated that the anticancer effect of HLP, partly contributed by ECG, in A375 cells. HLP potentially could be developed as an antimelanoma agent. © 2015 Institute of Food Technologists®

  19. [Chemical Constituents from Leaves of Hibiscus syriacus and Their α-Glucosidase Inhibitory Activities].

    Science.gov (United States)

    Wei, Qiang; Ji, Xiao-ying; Xu, Fei; Li, Qian-rong; Yin, Hao

    2015-05-01

    To study the chemical constituents from Hibiscus syriacus leaves and their α-glucosidase inhibitory activities. Column chromatography including macroporous resins, silica gel and Sephadex LH-20 were used for the isolation and purification of all compounds. Spectroscopic methods including physical and chemical properties, 1H-NMR and 13C-NMR were used for the identification of structures. Their α-glucosidase inhibitory activities were detected by a 96-well microplate. 15 compounds were isolated and identified as β-sitosterol(1), β-daucostero (2), β-amyrin (3), oleanolic acid (4), stigmast-4-en-3-one (5), friedelin (6), syriacusin A (7), kaempferol (8), isovitexin (9), vitexin (10), apigenin (11), apigenin-7-O-β-D-glucopyranoside (12), luteolin-7-O-β-D-glucopyranoside (13), vitexin-7-O-β-D-glucopyranoside (14) and rutin (15). All the compounds are isolated from the leaves of Hibiscus syriacus for the first time. Taking acarbose as positive control, the α-glucosidase inhibitory activities of 15 compounds were evaluated. Compounds 7 and 9 have shown strong α-glucosidase inhibitory activities with IC50 of 39.03 ± 0.38 and 32.12 ± 0.62 mg/L, inhibition ratio of 94.95% and 97.15%, respectively.

  20. Hibiscus syriacus Extract from an Established Cell Culture Stimulates Skin Wound Healing.

    Science.gov (United States)

    di Martino, O; Tito, A; De Lucia, A; Cimmino, A; Cicotti, F; Apone, F; Colucci, G; Calabrò, V

    2017-01-01

    Higher plants are the source of a wide array of bioactive compounds that support skin integrity and health. Hibiscus syriacus , family Malvaceae, is a plant of Chinese origin known for its antipyretic, anthelmintic, and antifungal properties. The aim of this study was to assess the healing and hydration properties of H. syriacus ethanolic extract (HSEE). We established a cell culture from Hibiscus syriacus leaves and obtained an ethanol soluble extract from cultured cells. The properties of the extract were tested by gene expression and functional analyses on human fibroblast, keratinocytes, and skin explants. HSEE treatment increased the healing potential of fibroblasts and keratinocytes. Specifically, HSEE significantly stimulated fibronectin and collagen synthesis by 16 and 60%, respectively, while fibroblasts contractility was enhanced by 30%. These results were confirmed on skin explants, where HSEE accelerated the wound healing activity in terms of epithelium formation and fibronectin production. Moreover, HSEE increased the expression of genes involved in skin hydration and homeostasis. Specifically, aquaporin 3 and filaggrin genes were enhanced by 20 and 58%, respectively. Our data show that HSEE contains compounds capable of stimulating expression of biomarkers relevant to skin regeneration and hydration thereby counteracting molecular pathways leading to skin damage and aging.

  1. Hibiscus syriacus Extract from an Established Cell Culture Stimulates Skin Wound Healing

    Directory of Open Access Journals (Sweden)

    O. di Martino

    2017-01-01

    Full Text Available Higher plants are the source of a wide array of bioactive compounds that support skin integrity and health. Hibiscus syriacus, family Malvaceae, is a plant of Chinese origin known for its antipyretic, anthelmintic, and antifungal properties. The aim of this study was to assess the healing and hydration properties of H. syriacus ethanolic extract (HSEE. We established a cell culture from Hibiscus syriacus leaves and obtained an ethanol soluble extract from cultured cells. The properties of the extract were tested by gene expression and functional analyses on human fibroblast, keratinocytes, and skin explants. HSEE treatment increased the healing potential of fibroblasts and keratinocytes. Specifically, HSEE significantly stimulated fibronectin and collagen synthesis by 16 and 60%, respectively, while fibroblasts contractility was enhanced by 30%. These results were confirmed on skin explants, where HSEE accelerated the wound healing activity in terms of epithelium formation and fibronectin production. Moreover, HSEE increased the expression of genes involved in skin hydration and homeostasis. Specifically, aquaporin 3 and filaggrin genes were enhanced by 20 and 58%, respectively. Our data show that HSEE contains compounds capable of stimulating expression of biomarkers relevant to skin regeneration and hydration thereby counteracting molecular pathways leading to skin damage and aging.

  2. Anti-Escherichia coli effect of Hibiscus sabdariffa L. in a meat model

    Directory of Open Access Journals (Sweden)

    Marcelo Pinto PAIM

    Full Text Available Abstract Hibiscus sabdariffa L. is used in traditional medicine because of its bioactive properties, such as antioxidant and antibacterial. Escherichia coli is a Gram-negative bacteria and as an indicator of contamination in food. The aim of this work was to evaluate the anti-Escherichia coli effect and the change in pH on the control of aerobic mesophilic microorganisms, using hydroethanolic extract of H. sabdariffa L. in different concentrations in a meat model, verifying its potential as food additive for microbiological stability on ground beef during cooling storage. For the preparation of the treatments, the meat experimental units were elaborated with different concentrations of the vegetal extract (5, 10, 15 and 20%, ground beef and contaminated with E. coli. For pH evaluation, the meat experimental units were added different percentages of hydroethanolic extract. The H. sabdariffa L. antibacterial action reduced two logarithmic levels in practically all treatments. The best pH result was obtained in the meat containing 30% of the extract. The hydroethanolic extracts of Hibiscus sabdariffa L. showed anti-Escherichia coli activity in the presence of refrigerated ground beef. Analyzing the pH results and the count of aerobic mesophilic bacteria, it is possible this extract to be used as a natural food additive.

  3. Taxonomic evaluation using pollen grain sculpture and seed coat characters of 11 taxa of genus Hibiscus (Malvaceae in Egypt

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    M.A. El-Kholy

    2011-06-01

    Full Text Available Pollen grain morphology and seed coat characters of 11 cultivars belonging to two species of genus Hibiscus (Family Malvaceae namely H. esculentus, H. abelmoschus and H. sabdariffa were investigated. This study was carried out using light microscope (LM and scanning electron microscopy (SEM. Pollen morphology of this genus is fairly uniform. Generally radially symmetrical apolar, mostly spheroidal, pantoporate. Seed exomorphic characters revealed four types of ornamentations; reticulate, ocealate, foveolate and ruminate. Sodium Dodecyl Sulfate Polyacrylamide Gel Electrophoresis (SDS–PAGE was employed to characterize those taxa. Thirty-one bands of seed protein profiles have been constructed from the gel. The produced dendrograms that were analyzed by STATISCA program using UPGMA clustering method showed a close affinity among the seven H. esculentus cultivars and the four H. sabdariffa cultivars.

  4. Evaluation of roselle (Hibiscus sabdariffa) leaf and pomegranate (Punica granatum) fruit rind for activity against Meloidogyne incognita

    Science.gov (United States)

    Pomegranate (Punica granatum) fruit and roselle (Hibiscus sabdariffa) leaves have been used in traditional medicine, including as anthelmintics. Methanolic extracts from these plants were investigated for activity against the southern root-knot nematode (RKN) Meloidogyne incognita. Dried, ground p...

  5. Antimicrobial Effect of Jasminum grandiflorum L. and Hibiscus rosa-sinensis L. Extracts Against Pathogenic Oral Microorganisms--An In Vitro Comparative Study.

    Science.gov (United States)

    Nagarajappa, Ramesh; Batra, Mehak; Sharda, Archana J; Asawa, Kailash; Sanadhya, Sudhanshu; Daryani, Hemasha; Ramesh, Gayathri

    2015-01-01

    To assess and compare the antimicrobial potential and determine the minimum inhibitory concentration (MIC) of Jasminum grandiflorum and Hibiscus rosa-sinensis extracts as potential anti-pathogenic agents in dental caries. Aqueous and ethanol (cold and hot) extracts prepared from leaves of Jasminum grandiflorum and Hibiscus rosa-sinensis were screened for in vitro antimicrobial activity against Streptococcus mutans and Lactobacillus acidophilus using the agar well diffusion method. The lowest concentration of every extract considered as the minimum inhibitory concentration (MIC) was determined for both test organisms. Statistical analysis was performed with one-way analysis of variance (ANOVA). At lower concentrations, hot ethanol Jasminum grandiflorum (10 μg/ml) and Hibiscus rosa-sinensis (25 μg/ml) extracts were found to have statistically significant (P≤0.05) antimicrobial activity against S. mutans and L. acidophilus with MIC values of 6.25 μg/ml and 25 μg/ml, respectively. A proportional increase in their antimicrobial activity (zone of inhibition) was observed. Both extracts were found to be antimicrobially active and contain compounds with therapeutic potential. Nevertheless, clinical trials on the effect of these plants are essential before advocating large-scale therapy.

  6. CHEMICAL COMPOSITION, CRYSTALLINITY, AND THERMAL DEGRADATION OF BLEACHED AND UNBLEACHED KENAF BAST (Hibiscus cannabinus PULP AND NANOFIBERS

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    Mehdi Jonoobi

    2009-05-01

    Full Text Available Kenaf (Hibiscus cannabinus nanofibers were isolated from unbleached and bleached pulp by a combination of chemical and mechanical treatments. The chemical methods were based on NaOH-AQ (anthraquinone and three-stage bleaching (DEpD processes, whereas the mechanical techniques involved refining, cryo-crushing, and high-pressure homogenization. The size and morphology of the obtained fibers were characterized by environmental scanning electron microscopy (ESEM and transmission electron microscopy (TEM, and the studies showed that the isolated nanofibers from unbleached and bleached pulp had diameters between 10-90 nm, while their length was in the micrometer range. Fourier transform infrared (FTIR spectroscopy demonstrated that the content of lignin and hemicellulose decreased in the pulping process and that lignin was almost completely removed during bleaching. Moreover, thermogravimetric analysis (TGA indicated that both pulp types as well as the nanofibers displayed a superior thermal stability as compared to the raw kenaf. Finally, X-ray analyses showed that the chemo-mechanical treatments altered the crystallinity of the pulp and the nanofibers: the bleached pulp had a higher crystallinity than its unbleached counterpart, and the bleached nanofibers presented the highest crystallinity of all the investigated materials.

  7. Cytotoxic activity of kenaf (Hibiscus cannabinus L.) seed extract and oil against human cancer cell lines

    Science.gov (United States)

    Wong, Yu Hua; Tan, Wai Yan; Tan, Chin Ping; Long, Kamariah; Nyam, Kar Lin

    2014-01-01

    Objective To examine the cytotoxic properties of both the kenaf (Hibiscus cannabinus L.) seed extract and kenaf seed oil on human cervical cancer, human breast cancer, human colon cancer and human lung cancer cell lines. Methods The in vitro cytotoxic activity of the kenaf (Hibiscus cannabinus L.) seed extract and kenaf seed oil on human cancer cell lines was evaluated by using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide and sulforhodamine B assays. Cell morphological changes were observed by using an inverted light microscope. Results The kenaf seed extract (KSE) exhibited a lower IC50 than kenaf seed oil (KSO) in all of the cancer cell lines. Morphological alterations in the cell lines after KSE and KSO treatment were observed. KSE and KSO possessed effective cytotoxic activities against all the cell lines been selected. Conclusions KSE and KSO could be potential sources of natural anti-cancer agents. Further investigations on using kenaf seeds for anti-proliferative properties are warranted. PMID:25183141

  8. USE OF ELECTRONIC EDUCATIONAL RESOURCES WHEN TRAINING IN WORK WITH SPREADSHEETS

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    Х А Гербеков

    2017-12-01

    Full Text Available Today the tools for maintaining training courses based on opportunities of information and communication technologies are developed. Practically in all directions of preparation and on all subject matters electronic textbook and self-instruction manuals are created. Nevertheless the industry of computer educational and methodical materials actively develops and gets more and more areas of development and introduction. In this regard more and more urgent is a problem of development of the electronic educational resources adequate to modern educational requirements. Creation and the organization of training courses with use of electronic educational resources in particular on the basis of Internet technologies remains a difficult methodical task.In article the questions connected with development of electronic educational resources for use when studying the substantial line “Information technologies” of a school course of informatics in particular for studying of spreadsheets are considered. Also the analysis of maintenance of a school course and the unified state examination from the point of view of representation of task in him corresponding to the substantial line of studying “Information technologies” on mastering technology of information processing in spreadsheets and the methods of visualization given by means of charts and schedules is carried out.

  9. Seasonal variation in Hibiscus sabdariffa (Roselle) calyx phytochemical profile, soluble solids and α-glucosidase inhibition.

    Science.gov (United States)

    Ifie, Idolo; Ifie, Beatrice E; Ibitoye, Dorcas O; Marshall, Lisa J; Williamson, Gary

    2018-09-30

    Seasonal variations in crops can alter the profile and amount of constituent compounds and consequentially any biological activity. Differences in phytochemical profile, total phenolic content and inhibitory activity on α-glucosidase (maltase) of Hibiscus sabdariffa calyces grown in South Western Nigeria were determined over wet and dry seasons. The phenolic profile, organic acids and sugars were analysed using HPLC, while inhibition of rat intestinal maltase was measured enzymically. There was a significant increase (1.4-fold; p ≤ 0.05) in total anthocyanin content in the dry compared to wet planting seasons, and maltase inhibition from the dry season was slightly more potent (1.15-fold, p ≤ 0.05). Fructose (1.8-fold), glucose (1.8-fold) and malic acid (3.7-fold) were significantly higher (p ≤ 0.05) but citric acid was lower (62-fold, p ≤ 0.008) in the dry season. Environmental conditions provoke metabolic responses in Hibiscus sabdariffa affecting constituent phytochemicals and nutritional value. Copyright © 2018 Elsevier Ltd. All rights reserved.

  10. Polyphenolic extract from Hibiscus sabdariffa reduces body fat by inhibiting hepatic lipogenesis and preadipocyte adipogenesis.

    Science.gov (United States)

    Kao, Erl-Shyh; Yang, Mon-Yuan; Hung, Chia-Hung; Huang, Chien-Ning; Wang, Chau-Jong

    2016-01-01

    Diets high in fat lead to excess lipid accumulation in adipose tissue, which is a crucial factor in the development of obesity, hepatitis, and hyperlipidemia. In this study, we investigated the anti-obesity effect of Hibiscus sabdariffa extract (HSE) in vivo. Hamsters fed a high-fat diet (HFD) develop symptoms of obesity, which were determined based on body weight changes and changes in plasma and serum triglycerides, free fatty acid concentrations, total cholesterol levels, LDL-C levels, HDL-C levels, and adipocyte tissue weight. HFD-fed hamsters were used to investigate the effects of HSE on symptoms of obesity such as adipogenesis and fatty liver, loss of blood glucose regulation, and serum ion imbalance. Interestingly, HSE treatment effectively reduced the effects of the HFD in hamsters in a dose-dependent manner. Further, after inducing maturation of preadipocytes, Hibiscus sabdariffa polyphenolic extract (HPE) was shown to suppress the adipogenesis of adipocytes. However, HPE does not affect the viability of preadipocytes. Therefore, both HSE and HPE are effective and viable treatment strategies for preventing the development and treating the symptoms of obesity.

  11. COMPORTAMIENTO DEL CRECIMIENTO EN ALTURA DE Hibiscus elatus Sw CULTIVADA EN CONTENEDORES

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    M. Cobas-López

    2003-01-01

    Full Text Available Hibiscus elatus Sw. (majagua es una especie nativa de Cuba, incluida en los planes de reforestación del país por su importancia económica, ecológica y su condición de ser una madera preciosa. En el trabajo se describe el comportamiento en vivero del crecimiento en altura de la especie, cultivada en contenedores. Se utilizaron cuatro tipos de sustratos, que fueron los siguientes: S1- Turba (40 %, humus de lombriz (40 % y corteza de pino compostada (20 %; S2- Estiércol de caballo (45 %, composta (40 %, y humus de lombriz (15 %; S3- Humus de lombriz (30 %, composta (25 %, turba (25 %, y estiércol de caballo (20 %; S4- Testigo, consistente en suelo proveniente de una plantación de la especie. A través del análisis de regresión se probaron nueve modelos matemáticos del tipo y = f (x, polinómicos, exponenciales y logarítmicos. De acuerdo con el coeficiente de determinación obtenido, del análisis de residuos y la validación de los modelos, se comprobó que la función que mejor representa el crecimiento en altura de Hibiscus elatus Sw., para los sustratos estudiados fue b t y b e 1 = 0 + .

  12. Impact of kenaf (Hibiscus cannabinus L.) leaf, bark, and core extracts on germination of five plant species

    Science.gov (United States)

    The chemical interaction between plants, which is referred to as allelopathy, may result in the inhibition of plant growth and development. The objective of this research was to determine the impact of kenaf (Hibiscus cannabinus L.) plant extracts on the germination and post-germination development ...

  13. Molecular cloning, characterization and expression of the caffeic acid O-methyltransferase (COMT) ortholog from kenaf (Hibiscus cannabinus)

    Science.gov (United States)

    We cloned the full-length of the gene putatively encoding caffeic acid O-methyltransferase (COMT) from kenaf (Hibiscus cannabinus L.) using degenerate primers and the RACE (rapid amplification of cDNA ends) method. Kenaf is an herbaceous and rapidly growing dicotyledonous plant with great potential ...

  14. Wilt, crown, and root rot of common rose mallow (Hibiscus moscheutos) caused by a novel Fusarium sp

    Science.gov (United States)

    A new crown and root rot disease of landscape plantings of the malvaceous ornamental common rose mallow (Hibiscus moscheutos) was first detected in Washington State in 2012. The main objectives of this study were to complete Koch's postulates, document the disease sypmtoms photographically, and iden...

  15. Effect of Chronic Gamma Irradiation on Kenaf (Hibiscus cannabinus. L) Variety V36

    International Nuclear Information System (INIS)

    Mohd Zulmadi Sani; Faiz Ahmad; Mustapha Akil; Zaiton Ahmad; Affrida Abu Hassan; Abdul Rahim Harun

    2016-01-01

    Kenaf (Hibiscus cannabinus) is originated from Africa and used in making various products such as animal food pallet, clothes, particle board, bio-plastics, paper and many other fibre related products. Due to its commercial value in various industries, research has been carried out to obtain kenaf with improved traits. Mutation breeding using ionizing radiation has been used widely and proven to be effective as an alternative method in plant improvement. In this study, chronic gamma irradiation on kenaf (Hibiscus cannabinus. L) Variety V36 was carried out at Gamma Greenhouse (GGH) facility at Malaysia Nuclear Agency. Kenaf seeds were planted in pots at the shade house and transferred to GGH after 7 days. These seedlings were subjected to various dose rates of 0.3 Gy/ hour, 0.17 Gy/ hour, 0.11 Gy /hour, 0.05 Gy/ hour, 0.03 Gy/ hour, 0.02 Gy/ hour, and 0 Gy/ hour (control). Plant survival and morphological data such as plant height and stem girth, were observed. From the result obtain, at accumulated dose of 230 Gy (Ring 4), plant showed the highest average plant height, stem girth and highest morphological changes. The finding of this study is useful in determining the most suitable dose rate for chronic gamma irradiation in the future. (author)

  16. Comparison of leaf anatomical characteristics of hibiscus rosa-sinensis grown in faisalabad region

    International Nuclear Information System (INIS)

    Noman, A.; Ali, Q.; Mehmood, T.; Iftikhar, T.; Mahmeed, M.

    2014-01-01

    The genetic potential of different plant species to different environmental conditions differ in relation to different physiological, biochemical and anatomical characteristics. Of these varying attributes leaf anatomical characteristics play most important role for the establishment of that cultivar in varied environmental conditions. So, the present study was conducted to assess the inter-cultivar genetic potential of Hibiscus in relation to leaf anatomical characteristics. To fulfill the study requirements Hibiscus rosa-sinensis and its six cultivars (were well adapted to their specific natural habitat) were collected from different locations of district Faisalabad Pakistan that have great environmental changes round the year. Results showed significant variability among cultivars in relation to analyzed anatomical characteristics. Cultivars Lemon shiffon and Wilder's white emerge more promising among others by possessing more epidermal thickness, increased epidermal cell area, high cortical cell area and incremented stomatal density as compared with other cultivars. On the other hand, cultivars Cooperi alba, Mrs. George Davis and Frank green possessed least cortex cell area, lowest xylem region thickness and minimum phloem region thickness respectively. Overall, it can be concluded that anatomical genetic potential has endorsed cultivars Lemon chiffon and Wilder's white with enormous capability to grow well under variable environments. (author)

  17. Evaluation of the Potential Nephroprotective and Antimicrobial Effect of Camellia sinensis Leaves versus Hibiscus sabdariffa (In Vivo and In Vitro Studies).

    Science.gov (United States)

    Anwar Ibrahim, Doa'a; Noman Albadani, Rowida

    2014-01-01

    Green tea and hibiscus are widely consumed as traditional beverages in Yemen and some regional countries. They are relatively cheap and the belief is that they improve health state and cure many diseases. The aim of this study was to evaluate the potential protective and antibacterial activity of these two famous plants in vitro through measuring their antibacterial activity and in vivo through measuring nonenzymatic kidney markers dysfunction after induction of nephrotoxicity by gentamicin. Gram positive bacteria like MRSA (methicillin resistant Staphylococcus aureus) were isolated from hospitalized patients' different sources (pus and wound) and Gram negative bacteria including E. coli and P. aeruginosa were used in vitro study. In addition, the efficacy of these plants was assessed in vivo through measuring nonenzymatic kidney markers including S. creatinine and S. urea. Green tea was shown antimicrobial activity against MRSA with inhibition zone 19.67 ± 0.33 mm and MIC 1.25 ± 0.00 mg/mL compared with standard reference (vancomycin) 18.00 ± 0.00 mg/mL. Hibiscus did not exhibit a similar effect. Both Hibiscus- and green tea-treated groups had nephroprotective effects as they reduced the elevation in nonenzymatic kidney markers. We conclude that green tea has dual effects: antimicrobial and nephroprotective.

  18. Evaluation of the Potential Nephroprotective and Antimicrobial Effect of Camellia sinensis Leaves versus Hibiscus sabdariffa (In Vivo and In Vitro Studies

    Directory of Open Access Journals (Sweden)

    Doa’a Anwar Ibrahim

    2014-01-01

    Full Text Available Green tea and hibiscus are widely consumed as traditional beverages in Yemen and some regional countries. They are relatively cheap and the belief is that they improve health state and cure many diseases. The aim of this study was to evaluate the potential protective and antibacterial activity of these two famous plants in vitro through measuring their antibacterial activity and in vivo through measuring nonenzymatic kidney markers dysfunction after induction of nephrotoxicity by gentamicin. Gram positive bacteria like MRSA (methicillin resistant Staphylococcus aureus were isolated from hospitalized patients’ different sources (pus and wound and Gram negative bacteria including E. coli and P. aeruginosa were used in vitro study. In addition, the efficacy of these plants was assessed in vivo through measuring nonenzymatic kidney markers including S. creatinine and S. urea. Green tea was shown antimicrobial activity against MRSA with inhibition zone 19.67 ± 0.33 mm and MIC 1.25 ± 0.00 mg/mL compared with standard reference (vancomycin 18.00 ± 0.00 mg/mL. Hibiscus did not exhibit a similar effect. Both Hibiscus- and green tea-treated groups had nephroprotective effects as they reduced the elevation in nonenzymatic kidney markers. We conclude that green tea has dual effects: antimicrobial and nephroprotective.

  19. Evaluation of the Potential Nephroprotective and Antimicrobial Effect of Camellia sinensis Leaves versus Hibiscus sabdariffa (In Vivo and In Vitro Studies)

    Science.gov (United States)

    Anwar Ibrahim, Doa'a; Noman Albadani, Rowida

    2014-01-01

    Green tea and hibiscus are widely consumed as traditional beverages in Yemen and some regional countries. They are relatively cheap and the belief is that they improve health state and cure many diseases. The aim of this study was to evaluate the potential protective and antibacterial activity of these two famous plants in vitro through measuring their antibacterial activity and in vivo through measuring nonenzymatic kidney markers dysfunction after induction of nephrotoxicity by gentamicin. Gram positive bacteria like MRSA (methicillin resistant Staphylococcus aureus) were isolated from hospitalized patients' different sources (pus and wound) and Gram negative bacteria including E. coli and P. aeruginosa were used in vitro study. In addition, the efficacy of these plants was assessed in vivo through measuring nonenzymatic kidney markers including S. creatinine and S. urea. Green tea was shown antimicrobial activity against MRSA with inhibition zone 19.67 ± 0.33 mm and MIC 1.25 ± 0.00 mg/mL compared with standard reference (vancomycin) 18.00 ± 0.00 mg/mL. Hibiscus did not exhibit a similar effect. Both Hibiscus- and green tea-treated groups had nephroprotective effects as they reduced the elevation in nonenzymatic kidney markers. We conclude that green tea has dual effects: antimicrobial and nephroprotective. PMID:24949007

  20. EFFECTS OF ALKALINE PRE-IMPREGNATION AND PULPING ON MALAYSIA CULTIVATED KENAF (HIBISCUS CANNABINUS

    OpenAIRE

    Lin Suan Ang; Cheu Peng Leh; Chong Chat Lee

    2010-01-01

    This study was carried out to identify an appropriate alkaline pulping condition for Malaysia cultivated kenaf (Hibiscus cannabinus L.). The chemical composition of the kenaf bast and core fibers, and also whole stalk with different growing time were examined prior to pulping attempts. The results of various soda-AQ pulping showed that the degree of carbohydrate degradation and delignification increased with the increase of active alkali and cooking temperature, but decreased with the increas...

  1. Analytical Study of Usage of Electronic Information Resources at Pharmacopoeial Libraries in India

    Directory of Open Access Journals (Sweden)

    Sunil Tyagi

    2014-02-01

    Full Text Available The objective of this study is to know the rate and purpose of the use of e-resource by the scientists at pharmacopoeial libraries in India. Among other things, this study examined the preferences of the scientists toward printed books and journals, electronic information resources, and pattern of using e-resources. Non-probability sampling specially accidental and purposive technique was applied in the collection of primary data through administration of user questionnaire. The sample respondents chosen for the study consists of principle scientific officer, senior scientific officer, scientific officer, and scientific assistant of different division of the laboratories, namely, research and development, pharmaceutical chemistry, pharmacovigilance, pharmacology, pharmacogonosy, and microbiology. The findings of the study reveal the personal experiences and perceptions they have had on practice and research activity using e-resource. The major findings indicate that of the total anticipated participants, 78% indicated that they perceived the ability to use computer for electronic information resources. The data analysis shows that all the scientists belonging to the pharmacopoeial libraries used electronic information resources to address issues relating to drug indexes and compendia, monographs, drugs obtained through online databases, e-journals, and the Internet sources—especially polices by regulatory agencies, contacts, drug promotional literature, and standards.

  2. Page 170 Use of Electronic Resources by Undergraduates in Two ...

    African Journals Online (AJOL)

    undergraduate students use electronic resources such as NUC virtual library, HINARI, ... web pages articles from magazines, encyclopedias, pamphlets and other .... of Nigerian university libraries have Internet connectivity, some of the system.

  3. Antioxidant and DNA damage protective properties of anthocyanin-rich extracts from Hibiscus and Ocimum: a comparative study.

    Science.gov (United States)

    Sarkar, Biswatrish; Kumar, Dhananjay; Sasmal, Dinakar; Mukhopadhyay, Kunal

    2014-01-01

    Anthocyanin extracts (AEs) from Ocimum tenuiflorum (leaf), Hibiscus rosa-sinensis (petal) and Hibiscus sabdariffa (calyx) were investigated and compared for in vitro antioxidant activity and DNA damage protective property. Total phenolic content (TPC) and total anthocyanin content (TAC) of the AEs were determined and the major anthocyanins were characterised. In vitro antioxidant activities were assessed by ferric-reducing antioxidant power (FRAP) assay, 2,2-diphenyl-1-picryl hydrazyl (DPPH) radical-scavenging activity, 2-deoxy-D-ribose degradation assay and lipid peroxidation assay. The protective property of the AEs was also examined against oxidative DNA damage by H2O2 and UV using pUC19 plasmid. All the AEs particularly those from O. tenuiflorum demonstrated efficient antioxidant activity and protected DNA from damage. Strong correlation between antioxidant capacity and TPC and TAC was observed. Significant correlation between antioxidant capacity and TPC and TAC ascertained that phenolics and anthocyanins were the major contributors of antioxidant activity.

  4. Quercetin, kaempferol, myricetin, and fatty acid content among several Hibiscus sabdariffa accession calyces based on maturity in a greenhouse

    Science.gov (United States)

    Flavonols including quercetin, kaempferol, myricetin, and fatty acids in plants have many useful health attributes including antioxidants, cholesterol lowering, and cancer prevention. Six accessions of roselle, Hibiscus sabdariffa calyces were evaluated for quercetin, kaempferol, and myricetin conte...

  5. Investigation of the bacterial retting community of kenaf (Hibiscus cannabinus) under different conditions using next-generation semiconductor sequencing

    Science.gov (United States)

    The use of the natural fibers requires the development of cost-efficient processing of fibers with consistent, uniform properties. The microbial communities associated with kenaf (Hibiscus cannabinus) plant fibers during retting were determined in an effort to identify possible means of accelerating...

  6. Model of e-learning with electronic educational resources of new generation

    Directory of Open Access Journals (Sweden)

    A. V. Loban

    2017-01-01

    Full Text Available Purpose of the article: improving of scientific and methodical base of the theory of the е-learning of variability. Methods used: conceptual and logical modeling of the е-learning of variability process with electronic educational resource of new generation and system analysis of the interconnection of the studied subject area, methods, didactics approaches and information and communication technologies means. Results: the formalization complex model of the е-learning of variability with electronic educational resource of new generation is developed, conditionally decomposed into three basic components: the formalization model of the course in the form of the thesaurusclassifier (“Author of e-resource”, the model of learning as management (“Coordination. Consultation. Control”, the learning model with the thesaurus-classifier (“Student”. Model “Author of e-resource” allows the student to achieve completeness, high degree of didactic elaboration and structuring of the studied material in triples of variants: modules of education information, practical task and control tasks; the result of the student’s (author’s of e-resource activity is the thesaurus-classifier. Model of learning as management is based on the principle of personal orientation of learning in computer environment and determines the logic of interaction between the lecturer and the student when determining the triple of variants individually for each student; organization of a dialogue between the lecturer and the student for consulting purposes; personal control of the student’s success (report generation and iterative search for the concept of the class assignment in the thesaurus-classifier before acquiring the required level of training. Model “Student” makes it possible to concretize the learning tasks in relation to the personality of the student and to the training level achieved; the assumption of the lecturer about the level of training of a

  7. A survey of the use of electronic scientific information resources among medical and dental students

    Directory of Open Access Journals (Sweden)

    Aarnio Matti

    2006-05-01

    Full Text Available Abstract Background To evaluate medical and dental students' utilization of electronic information resources. Methods A web survey sent to 837 students (49.9% responded. Results Twenty-four per cent of medical students and ninteen per cent of dental students searched MEDLINE 2+ times/month for study purposes, and thiry-two per cent and twenty-four per cent respectively for research. Full-text articles were used 2+ times/month by thirty-three per cent of medical and ten per cent of dental students. Twelve per cent of respondents never utilized either MEDLINE or full-text articles. In multivariate models, the information-searching skills among students were significantly associated with use of MEDLINE and full-text articles. Conclusion Use of electronic resources differs among students. Forty percent were non-users of full-text articles. Information-searching skills are correlated with the use of electronic resources, but the level of basic PC skills plays not a major role in using these resources. The student data shows that adequate training in information-searching skills will increase the use of electronic information resources.

  8. Isolation and identification of an allelopathic substance from Hibiscus sabdariffa.

    Science.gov (United States)

    Suwitchayanon, Prapaipit; Pukclai, Piyatida; Ohno, Osamu; Suenaga, Kiyotake; Kato-Noguchi, Hisashi

    2015-05-01

    In this study, an allelopathic substance was isolated from an aqueous methanol extract of Hibiscus sabdariffa L. by column chromatography and reverse phase HPLC. The chemical structure of the substance was determined by 1H NMR spectroscopy and mass spectrometry as trimethyl allo-hydroxycitrate. Trimethyl allo-hydroxycitrate inhibited the growth of cress hypocotyls and roots at concentrations greater than 10 mM. The concentrations required for 50% growth inhibition of the hypocotyls and roots of cress were 20.3 and 14.4 mM, respectively. The inhibitory activity of trimethyl allo-hydroxycitrate suggests that the substance may act as an allelopathic substance of H. sabdariffa.

  9. The acute impact of polyphenols from Hibiscus sabdariffa in metabolic homeostasis: an approach combining metabolomics and gene-expression analyses.

    Science.gov (United States)

    Beltrán-Debón, Raúl; Rodríguez-Gallego, Esther; Fernández-Arroyo, Salvador; Senan-Campos, Oriol; Massucci, Francesco A; Hernández-Aguilera, Anna; Sales-Pardo, Marta; Guimerà, Roger; Camps, Jordi; Menendez, Javier A; Joven, Jorge

    2015-09-01

    We explored the acute multifunctional effects of polyphenols from Hibiscus sabdariffa in humans to assess possible consequences on the host's health. The expected dynamic response was studied using a combination of transcriptomics and metabolomics to integrate specific functional pathways through network-based methods and to generate hypotheses established by acute metabolic effects and/or modifications in the expression of relevant genes. Data were obtained from healthy male volunteers after 3 hours of ingestion of an aqueous Hibiscus sabdariffa extract. The data were compared with data obtained prior to the ingestion, and the overall findings suggest that these particular polyphenols had a simultaneous role in mitochondrial function, energy homeostasis and protection of the cardiovascular system. These findings suggest beneficial actions in inflammation, endothelial dysfunction, and oxidation, which are interrelated mechanisms. Among other effects, the activation of the heme oxygenase-biliverdin reductase axis, the systemic inhibition of the renin-angiotensin system, the inhibition of the angiotensin-converting enzyme, and several actions mirroring those of the peroxisome proliferator-activated receptor agonists further support this notion. We also found concordant findings in the serum of the participants, which include a decrease in cortisol levels and a significant increase in the active vasodilator metabolite of bradykinin (des-Arg(9)-bradykinin). Therefore, our data support the view that polyphenols from Hibiscus sabdariffa play a regulatory role in metabolic health and in the maintenance of blood pressure, thus implying a multi-faceted impact in metabolic and cardiovascular diseases.

  10. Acclimation of croton and hibiscus seedlings in response to the application of indobultiric acid and humic acid for rooting

    Directory of Open Access Journals (Sweden)

    Lílian Estrela Borges Baldotto

    2015-06-01

    Full Text Available The vegetative propagation of ornamental plants can be accelerated by applying plant growth regulators. Amongst them, the use of auxins, plant hormones with physiological effects on cell elongation and rooting have stood out. Alternatively, the application of humic acids, bioactive fraction of soil organic matter, also results in increases in rooting cuttings of ornamental plants. The objective of this work was to study the growth characteristics and the nutritional contents of croton and hibiscus plants during acclimation of seedlings in response to different concentrations of indolebutyric acid (IBA and humic acid (HA applied to cuttings for rooting. The experiment was conducted in greenhouse, and the apical stem cuttings were treated with solutions with concentrations of 0, 250, 500, 1000 and 2000 mg L-1of IBA and 0, 10, 20, 30 and 40 mg L-1 of C from HA. At 45 days of rooting in carbonized rice husk, they were individually transferred to plastic bags of 2.0 dm3 containing a mixture of soil: sand: manure (2: 1: 1 as substrate. At 90 days of acclimation, the plants were collected for measurement of growth and nutritional variables. The results showed that the application of the IBA stimulates the absorption of nutrients and growth of croton cuttings and transplanted hibiscus, contributing to formation of vigorous seedlings. A similar response occurred with the application of HA in hibiscus cuttings

  11. Field evaluation of two systemic neonicotinoid insecticides against pink hibiscus mealybug (Maconellicoccus hirsutus (Green))on mulberry trees

    Science.gov (United States)

    Infestations of the pink hibiscus mealybug, Maconellicoccus hirsutus (Green), in ornamental trees were already in an advanced state at the time of its discovery in the Imperial Valley of California (USA) in August 1999. Concern about the spread of M. hirsutus beyond the Imperial Valley led to the p...

  12. Effect of Absolute From Hibiscus syriacus L. Flower on Wound Healing in Keratinocytes

    Science.gov (United States)

    Yoon, Seok Won; Lee, Kang Pa; Kim, Do-Yoon; Hwang, Dae Il; Won, Kyung-Jong; Lee, Dae Won; Lee, Hwan Myung

    2017-01-01

    Background: Proliferation and migration of keratinocytes are essential for the repair of cutaneous wounds. Hibiscus syriacus L. has been used in Asian medicine; however, research on keratinocytes is inadequate. Objective: To establish the dermatological properties of absolute from Hibiscus syriacus L. flower (HSF) and to provide fundamental research for alternative medicine. Materials and Methods: We identified the composition of HSF absolute using gas chromatography-mass spectrometry analysis. We also examined the effect of HSF absolute in HaCaT cells using the XTT assay, Boyden chamber assay, sprout-out growth assay, and western blotting. We conducted an in-vivo wound healing assay in rat tail-skin. Results: Ten major active compounds were identified from HSF absolute. As determined by the XTT assay, Boyden chamber assay, and sprout-out growth assay results, HSF absolute exhibited similar effects as that of epidermal growth factor on the proliferation and migration patterns of keratinocytes (HaCaT cells), which were significantly increased after HSF absolute treatment. The expression levels of the phosphorylated signaling proteins relevant to proliferation, including extracellular signal-regulated kinase 1/2 (Erk 1/2) and Akt, were also determined by western blot analysis. Conclusion: These results of our in-vitro and ex-vivo studies indicate that HSF absolute induced cell growth and migration of HaCaT cells by phosphorylating both Erk 1/2 and Akt. Moreover, we confirmed the wound-healing effect of HSF on injury of the rat tail-skin. Therefore, our results suggest that HSF absolute is promising for use in cosmetics and alternative medicine. SUMMARY Hisbiscus syriacus L. flower absolute increases HaCaT cell migration and proliferation.Hisbiscus syriacus L. flower absolute regulates phosphorylation of ERK 1/2 and Akt in HaCaT cell.Treatment with Hisbiscus syriacus L. flower induced sprout outgrowth.The wound in the tail-skin of rat was reduced by Hisbiscus syriacus

  13. Access to electronic information resources by students of federal ...

    African Journals Online (AJOL)

    The paper discusses access to electronic information resources by students of Federal Colleges of Education in Eha-Amufu and Umunze. Descriptive survey design was used to investigate sample of 526 students. Sampling technique used was a Multi sampling technique. Data for the study were generated using ...

  14. Adoption and use of electronic information resources by medical ...

    African Journals Online (AJOL)

    This study investigated the adoption and use of electronic information resources by medical science students of the University of Benin. The descriptive survey research design was adopted for the study and 390 students provided the data. Data collected were analysed with descriptive Statistics(Simple percentage and ...

  15. Physiological and biochemical responses of Hibiscus sabdariffa to drought stress in the presence of salicylic acid

    Directory of Open Access Journals (Sweden)

    Marzieh Mirshekari

    2017-08-01

    Salicylic acid (SA is one of the important signal molecules, which modulates plant responses to environmental stress. In the present work, impact of exogenous SA on some physiological and biochemical traits of Hibiscus sabdariffa in response to drought stress was studied. Hibiscus sabdariffa seedlings were exposed to six drought levels (0, -0.05, -0.1, -0.5, -0.75, and 1 MPa with two SA concentrations (0 and 500 µM in 5 days intervals up to 20 days in a factorial design. During drought stress period, the root and shoot growth, relative water content, pigments content, non-reducing sugar and starch content was significantly decreased. SA treatment cause prevention of the growth reduction and improvement of relative water content. Protein concentration was roughly unchanged during drought stress with SA, while, reducing sugars accumulates and non-reducing sugars and starch significantly decreases. The results show that exogenous SA application on leaves during drought stress can ameliorate detrimental effects of stress through reducing water loss and accumulating reducing sugars, which cause preserving turgor pressure of the cells.

  16. Preliminary X-ray data analysis of crystalline hibiscus chlorotic ringspot virus

    International Nuclear Information System (INIS)

    Cheng, Ao; Speir, Jeffrey A.; Yuan, Y. Adam; Johnson, John E.; Wong, Sek-Man

    2009-01-01

    Hibiscus chlorotic ringspot virus is a positive-sense monopartite single-stranded RNA virus that belongs to the Carmovirus genus of the Tombusviridae family. Authentic virus harvested from infected host kenaf leaves was purified and virus crystals were grown in multiple conditions. One of the crystals diffracted to 3.2 Å resolution and allowed the collection of a partial data set. Hibiscus chlorotic ringspot virus (HCRSV) is a positive-sense monopartite single-stranded RNA virus that belongs to the Carmovirus genus of the Tombusviridae family, which includes carnation mottle virus (CarMV). The HCRSV virion has a 30 nm diameter icosahedral capsid with T = 3 quasi-symmetry containing 180 copies of a 38 kDa coat protein (CP) and encapsidates a full-length 3.9 kb genomic RNA. Authentic virus was harvested from infected host kenaf leaves and was purified by saturated ammonium sulfate precipitation, sucrose density-gradient centrifugation and anion-exchange chromatography. Virus crystals were grown in multiple conditions; one of the crystals diffracted to 3.2 Å resolution and allowed the collection of a partial data set. The crystal belonged to space group R32, with unit-cell parameters a = b = 336.4, c = 798.5 Å. Packing considerations and rotation-function analysis determined that there were three particles per unit cell, all of which have the same orientation and fixed positions, and resulted in tenfold noncrystallography symmetry for real-space averaging. The crystals used for the structure determination of southern bean mosaic virus (SBMV) have nearly identical characteristics. Together, these findings will greatly aid the high-resolution structure determination of HCRSV

  17. Development and characterization of microsatellite markers for Hibiscus glaber Matsum. ex Nakai, an endemic tree species of the oceanic Bonin Islands, Japan.

    Science.gov (United States)

    Ohtani, Masato; Tani, Naoki; Yoshimaru, Hiroshi

    2008-11-01

    Polymorphic microsatellite markers were developed for Hibiscus glaber, an endemic tree of the Bonin Islands. Eighty-seven of the 208 sequences from an enriched library were unique and containing microsatellites. Ten loci were proved to be highly polymorphic among 78 individuals from the Nishi-jima Island. Total exclusionary powers for the first and the second parents were 99.989% and 99.999%, respectively. Nine loci also amplified single fragment from genomic DNA of H. tiliaceus, a related and widespread congener. Our markers can be reliably used for the estimation of current gene flow within/among populations of the two woody Hibiscus species. © 2008 The Authors. Journal compilation © 2008 Blackwell Publishing Ltd.

  18. Where Do Electronic Books Fit in the College Research Arsenal of Resources?

    Science.gov (United States)

    Barbier, Patricia

    2007-01-01

    Student use of electronic books has become an accepted supplement to traditional resources. Student use and satisfaction was monitored through an online course discussion board. Increased use of electronic books indicate this service is an accepted supplement to the print book collection.

  19. A distributional and cytological survey of the presently recognized taxa of Hibiscus section Furcaria (Malvaceae.

    Directory of Open Access Journals (Sweden)

    F. Douglas Wilson

    2006-01-01

    Full Text Available Hibiscus section Furcaria is a natural group of plants that presently includes 109 recognized taxa. Taxa are found in subsaharan Africa, India, southeastern Asia, Malesia, Australia, islands of the Pacific basin, the Caribbean, North, Central, and South America. The basic chromosome number is x = 18. In nature, ploidy levels range from diploid to decaploid. The taxa exhibit a remarkable amount of genome diversity. At least 13 genomes have been identified, some distributed widely and others with more restricted distributions. No modern taxonomic monograph ofHibiscus section Furcaria exists, but a number of regional studies have appeared that are essentially global in extent. Also, a number of studies of chromosome numbers and genome relationships have been published. The present paper includes a census of all the presently accepted taxa, the geographical distribution of each taxon, and chromosome numbers and genome designations of the 49 taxa for which the information is available. Important mechanisms of speciation include genome divergence at the diploid level, followed by hybridization and allopolyploidy, significant species radiation at the tetraploid and hexaploid levels, and the development of even higher levels of allopolyploids.

  20. The Role of Leaves in Photocontrol of Flower Bud Abscission in Hibiscus rosa-sinensis L. 'Nairobi'

    NARCIS (Netherlands)

    Meeteren, van U.; Gelder, van A.

    2000-01-01

    When compared with exposure to darkness, exposing Hibiscus rosa-sinensis L. 'Nairobi' plants to red light (635 to 685 nm, 2.9 μmol?m-2?s-1) delayed flower bud abscission, while exposure to far-red light (705 to 755 nm, μmol?m-2?s-1) accelerated this process. Flower bud abscission in response to

  1. Laboratory Evaluation of Different Insecticides against Hibiscus Mealybug, Maconellicoccus hirsutus (Hemiptera: Pseudococcidae

    Directory of Open Access Journals (Sweden)

    Samman Fatima

    2016-01-01

    Full Text Available Hibiscus mealybug, Maconellicoccus hirsutus (Hemiptera: Pseudococcidae, is the major pest of many vegetables, fruits, crops, and ornamental plants causing losses to the farmers and its control has been an issue of significance in the pest management. This study was aimed at evaluating different concentrations (0.06%, 0.1%, and 0.14% of Telsta, Advantage, Talstar, Imidacloprid, and their mixtures against hibiscus mealybug in the Laboratory of Systematics and Pest Management at University of Gujrat, Pakistan. The toxic effect was evaluated in the laboratory bioassay after 24 and 48 h of the application of insecticides. The highest mortality (95.83% was shown by Talstar and Talstar + Imidacloprid at the concentration of 0.14% after 48 h followed by Advantage + Talstar with 87.50% mortality at 0.14% concentration after 48 h of application. The study also showed that the least effective treatment observed was Advantage + Telsta with no mortality after 24 h and 25% mortality after 48 h at 0.14% concentration. The study revealed that the concentration 0.14% was highly effective in lowering the mealybug population and insecticide mixtures were effective in reducing mealybug density. The study emphasizes the use of such insecticide mixtures to develop better management strategy for mealybug populations attacking ornamental plants. However effects of such insecticide mixtures on other organisms and biological control agents should be checked under field conditions.

  2. OPTIMISATION OF HIBISCUS SABDARIFFA AS A NATURAL COAGULANT TO TREAT CONGO RED IN WASTEWATER

    Directory of Open Access Journals (Sweden)

    MUN Y. YONG

    2016-02-01

    Full Text Available The process of coagulation is commonly practiced in water and wastewater treatment to reduce level of dissolved chemical, turbidity and so on with the usage of coagulant. Aluminium sulphate (alum is the most commonly used coagulant, however, recent studies show that residual aluminium in drinking water and sludge may induce Alzheimer’s disease and environmental issues. Natural coagulant which is environmental friendly and non-toxic is developed as an alternative to overcome these issues. In this work, Hibiscus Sabdariffa was studied as natural coagulant to treat dye wastewater containing Congo red. The seeds were extracted with different solvent such as distilled water, 0.5 M NaCl and 0.05 M NaOH to extract the coagulation agent. The working parameters were optimised using Response Surface Methodology (RSM. 0.5 M NaCl was found to have highest colour removal of 95.1 % among the solvents. In addition, Hibiscus Sabdariffa seed was found to be an effective coagulant that has 91.2 % colour removal at the optimal working condition of pH 2, 190 mg/L coagulant dosage at 400 ppm of dye concentration. It was also been identified that the performance of natural coagulant is comparable with conventional coagulant, aluminium sulphate with colour removal of 91.2 % and 92.3 % respectively.

  3. Ethyl acetate fraction from Hibiscus sabdariffa L. attenuates diabetes-associated cognitive impairment in mice.

    Science.gov (United States)

    Seung, Tae Wan; Park, Seon Kyeong; Kang, Jin Yong; Kim, Jong Min; Park, Sang Hyun; Kwon, Bong Seok; Lee, Chang Jun; Kang, Jeong Eun; Kim, Dae Ok; Lee, Uk; Heo, Ho Jin

    2018-03-01

    The ameliorating effects of the ethyl acetate fraction from Hibiscus sabdariffa L. (EFHS) 2 against diabetes mellitus (DM) 3 and DM-induced cognitive impairment were investigated on streptozotocin (STZ) 4 -induced DM mice. The EFHS groups showed improved hyperglycemia and glucose tolerance compared to the STZ group. Furthermore, their liver and kidney function and lipid metabolic imbalance in the blood serum were effectively recovered. The EFHS groups significantly ameliorated STZ-induced cognitive impairment in Y-maze, passive avoidance, and Morris water maze (MWM) 5 tests. The EFHS groups showed significant improvement in the antioxidant and cholinergic systems of the brain tissue. In addition, EFHS had an excellent ameliorating effect on protein expression levels from the tau hyperphosphorylation pathways, such as phospho-c-Jun N-terminal kinases (p-JNK), 6 phospho-tau (p-tau), 7 and cleaved poly (ADP-ribose) polymerase (c-PARP). 8 The main compounds of EFHS were identified as various phenolic compounds, including hibiscus acid, caffeoylquinic acid (CQA) 9 isomers, and quercetin derivates. Therefore, EFHS containing various physiologically active materials can potentially be used for improving DM-induced cognitive impairment via its antioxidant activity, improvement of the cholinergic system, and hyperphosphorylation tau signaling. Copyright © 2017 Elsevier Ltd. All rights reserved.

  4. Vitiquinolone--a quinolone alkaloid from Hibiscus vitifolius Linn.

    Science.gov (United States)

    Ramasamy, D; Saraswathy, A

    2014-02-15

    Phytochemical investigations of the powdered root of Hibiscus vitifolius Linn. (Malvaceae) was extracted successively with n-hexane and chloroform. Analysis of the n-hexane extract by GC-MS led to the identification of twenty-six components by comparison of their mass spectra with GC-MS library data. A novel quinolone alkaloid, vitiquinolone (5) together with eight known compounds viz. β-Amyrin acetate (1), n-octacosanol (2), β-Amyrin (3), stigmasterol (4), xanthyletin (6), alloxanthoxyletin (7), xanthoxyletin (8) and betulinic acid (9) were isolated from chloroform extract by column chromatography over silica gel. The structure of vitiquinolone was established on the basis of spectroscopic methods including UV, IR, 1D, 2D NMR and ESI-MS. The known compounds were identified on the basis of their physical and spectroscopic data as reported in the literature. Copyright © 2013 Elsevier Ltd. All rights reserved.

  5. Antimicrobial, antiparasitic and anticancer properties of Hibiscus sabdariffa (L.) and its phytochemicals: in vitro and in vivo studies.

    Science.gov (United States)

    Hassan, Sherif T S; Berchová, Kateřina; Šudomová, Miroslava

    In the last few decades, Hibiscus sabdariffa L. (Malvaceae; H. sabdariffa) has gained much attention in research field because of its potentially useful bioactivity as well as a great safety and tolerability. For decades, microbial, parasitic and cancer diseases remain a serious threat to human health and animals as well. To treat such diseases, a search for new sources such as plants that provide various bioactive compounds useful in the treatment of several physiological conditions is urgently needed, since most of the drugs currently used in the therapy have several undesirable side effects, toxicity, and drug resistance. In this paper, we aim to present an updated overview of in vitro and in vivo studies that show the significant therapeutic properties of the crude extracts and phytochemicals derived from H. sabdariffa as antimicrobial, antiparasitic, and anticancer agents. The future directions of the use of H. sabdariffa in clinical trials will be discussed. Hibiscus sabdariffa L. antimicrobial agents cancer preventive agents antiparasitic drugs natural products.

  6. Strategic Planning for Electronic Resources Management: A Case Study at Gustavus Adolphus College

    Science.gov (United States)

    Hulseberg, Anna; Monson, Sarah

    2009-01-01

    Electronic resources, the tools we use to manage them, and the needs and expectations of our users are constantly evolving; at the same time, the roles, responsibilities, and workflow of the library staff who manage e-resources are also in flux. Recognizing a need to be more intentional and proactive about how we manage e-resources, the…

  7. REVIEW OF MOODLE PLUGINS FOR DESIGNING MULTIMEDIA ELECTRONIC EDUCATIONAL RESOURCES FROM LANGUAGE DISCIPLINES

    Directory of Open Access Journals (Sweden)

    Anton M. Avramchuk

    2015-09-01

    Full Text Available Today the problem of designing multimedia electronic educational resources from language disciplines in Moodle is very important. This system has a lot of different, powerful resources, plugins to facilitate the learning of students with language disciplines. This article presents an overview and comparative analysis of the five Moodle plugins for designing multimedia electronic educational resources from language disciplines. There have been considered their key features and functionality in order to choose the best for studying language disciplines in the Moodle. Plugins are compared by a group of experts according to the criteria: efficiency, functionality and easy use. For a comparative analysis of the plugins it is used the analytic hierarchy process.

  8. Complete nucleotide sequence of a novel Hibiscus-infecting Cilevirus from Florida and its relationship with closely associated Cileviruses

    Science.gov (United States)

    The complete nucleotide sequence of a recently discovered Florida (FL) isolate of Hibiscus infecting Cilevirus (HiCV) was determined by Sanger sequencing. The movement- and coat- protein gene sequences of the HiCV-FL isolate are more divergent than other genes of the previously sequenced HiCV-HA (Ha...

  9. Characterization of developmental and stress mediated expression of cinnamoyl-CoA reductase (CCR) in kenaf (Hibiscus cannabinus L.)

    Science.gov (United States)

    Cinnamoyl-CoA reductase (CCR) is an important enzyme for lignin biosynthesis as it catalyzes the first specific committed step in monolignol biosynthesis. We have cloned a full length coding sequence of CCR from kenaf (Hibiscus cannabinus L.), which contains a 1,020-bp open reading frame (ORF), enco...

  10. Evaluation of Biological Effects of Hydroalcoholic Extract of Hibiscus Rosa Sinensis Flowers on Alloxan Induced Diabetes in Rats.

    Science.gov (United States)

    Pethe, Mohan; Yelwatkar, Samir; Manchalwar, Smita; Gujar, Vijay

    2017-08-01

    Aim and Objective The current study sought to investigate antidiabetic, hypolipidimic, antioxidant and histopathological effects of floral extract of Hibiscus rosa sinensis in Alloxan induced Diabetes in rats. Materials and Methods Study was conducted on 6 groups with 6 wistar rats in each group for the period of 4 weeks. Group I: served as normal control (NC), rats administered with gum acacia 1 ml daily, group II: consider as diabetic control (DC) treated with alloxon 150 mg/kg body wt. Whereas Hibiscus rosa-sinensis flower extract was given orally in group III (DE1), group IV (DE2), group V (DE3) at doses of 50, 100 and 200 mg/kg body weight dissolved in distilled water respectively. Group VI (DG) was given glibenclamide (5 mg/kg) as a standard drug and results were compared in reference to it. Results The results indicate that the test compound HEFHR (Hydroalcoholic extract of flower Hibiscus rosa-sinensis) has significant and sustained oral antidiabetic activity, comparable with the hypoglycemic effect of Glibenclamide and Sulphonylurea. Flower extract of HRS was more efficacious in lipid lowering effect and in antioxidative activity than glibenclamide. After 28 day treatment with flower extract, size of islets was significantly increased and necrosis and atrophy of islets were significantly improved; also increase in number and diameter of cell islets appeared to be regular as compared to the diabetic group. Conclusion HEFHR possesses significant antidiabetic, hypolipidemic and antioxidant properties as well as regeneration of beta cells in rats. Further evaluation of HEFHR is in progress. © Georg Thieme Verlag KG Stuttgart · New York.

  11. Triple bag hermetic technology for controlling a bruchid (Spermophagus sp.) (Coleoptera, Chrysomelidae) in stored Hibiscus sabdariffa grain.

    Science.gov (United States)

    Amadou, L; Baoua, I B; Baributsa, D; Williams, S B; Murdock, L L

    2016-10-01

    We assessed the performance of hermetic triple layer Purdue Improved Crop Storage (PICS) bags for protecting Hibiscus sabdariffa grain against storage insects. The major storage pest in the grain was a bruchid, Spermophagus sp.. When we stored infested H. sabdariffa grain for six months in the woven polypropylene bags typically used by farmers, the Spermophagus population increased 33-fold over that initially present. The mean number of emergence holes per 100 seeds increased from 3.3 holes to 35.4 holes during this time period, while grain held for the same length of time in PICS bags experienced no increase in the numbers of holes. Grain weight loss in the woven control bags was 8.6% while no weight loss was observed in the PICS bags. Seed germination rates of grain held in woven bags for six months dropped significantly while germination of grain held in PICS bags did not change from the initial value. PICS bags can be used to safely store Hibiscus grain after harvest to protect against a major insect pest.

  12. Modern ICT Tools: Online Electronic Resources Sharing Using Web ...

    African Journals Online (AJOL)

    Modern ICT Tools: Online Electronic Resources Sharing Using Web 2.0 and Its Implications For Library And Information Practice In Nigeria. ... The PDF file you selected should load here if your Web browser has a PDF reader plug-in installed (for example, a recent version of Adobe Acrobat Reader). If you would like more ...

  13. Growth and biomass productivity of kenaf (Hibiscus cannabinus, L.) under different agricultural inputs and management practices in central Greece

    NARCIS (Netherlands)

    Danalatos, N.G.; Archontoulis, S.V.

    2010-01-01

    The growth and biomass productivity of kenaf (Hibiscus cannabinus, L.) cultivars Tainung 2 and Everglades 41 were determined under three irrigation applications (low: 25%, moderate: 50% and fully: 100% of maximum evapotranspiration; ETm), four nitrogen dressings (0, 50, 100 and 150 kg hat), two

  14. In Vitro Digestibility of Aluminum from Hibiscus sabdariffa Hot Watery Infusion and Its Concentration in Urine of Healthy Individuals

    Czech Academy of Sciences Publication Activity Database

    Frankova, A.; Malik, J.; Drabek, O.; Szakova, J.; Sperlingova, I.; Kloucek, P.; Novy, P.; Tejnecky, V.; Landa, Přemysl; Leuner, O.; Kokoska, L.

    2016-01-01

    Roč. 174, č. 2 (2016), s. 267-273 ISSN 0163-4984 Institutional support: RVO:61389030 Keywords : dialysis dementia * tea * bioavailability * speciation * toxicity * Aluminum * In vitro digestion * Hot watery infusion * Urine * Hibiscus sabdariffa L Subject RIV: EF - Botanics Impact factor: 2.399, year: 2016

  15. Hibiscus sabdariffa L. tea (tisane) lowers blood pressure in prehypertensive and mildly hypertensive adults: a randomized, placebo-controlled clinical trial

    Science.gov (United States)

    Background: In vitro studies have shown Hibiscus sabdariffa L., an ingredient found in many herbal tea blends and other beverages, has antioxidant properties, and, in animal models, extracts of its calyces have demonstrated hypocholesterolemic and anti-hypertensive properties. Objective: To exa...

  16. OPTIMIZATION OF HIBISCUS SABDARIFFA L. (ROSELLE) ANTHOCYANIN AQUEOUS-ETHANOL EXTRACTION PARAMETERS USING RESPONSE SURFACE METHODOLOGY

    OpenAIRE

    ANILÚ MIRANDA-MEDINA; PATRICIA M. HAYWARD-JONES; OCTAVIO CARVAJAL-ZARRABAL; LUZ DEL ALBA LADRÓN DE GUEVARA-VELA; YERIKC DAVID RAMÍREZ-VILLAGÓMEZ; DULCE M. BARRADAS-DERMITZ; GEORGINA LUNA-CARRILLO; MARÍA G. AGUILAR-USCANGA

    2018-01-01

    Anthocyanins along with protocatechuic acid and quercetin have been recognized as bioactive compounds in Hibiscus sabdariffa L. aqueous extracts. Characteristic anthocyanin absorption in the visible region makes their quantification possible without the interference of the other two compounds, and also can favor its potential application as an alternative to organic-based dye sensitized solar cell, in various forms. In order to optimize measurable factors linked to the extraction of these fla...

  17. Genetic variability for phenotype, seed production, oil content, and fatty acid composition among 17 Roselle (Hibiscus sabdariffa) accessions

    Science.gov (United States)

    Seed oil and fatty acids in plants have human health implications. Oil from roselle (Hibiscus sabdariffa L.) seeds are used in Taiwan as a diuretic, laxative, and tonic. The objectives of this study were to evaluate seeds from 17 roselle accessions for oil and fatty acid variation in a greenhouse. S...

  18. Natural cross-pollination in roselle, Hibiscus sabdariffa L. (Malvaceae

    Directory of Open Access Journals (Sweden)

    Vaidya K.R.

    2000-01-01

    Full Text Available Two local varieties of roselle (Hibiscus sabdariffa L., Jamaican Green and Jamaican Red, were grown to determine the amount of natural cross-pollination. Two planting arrangements (alternating rows; alternating individuals in a row and two planting dates, a month apart, were used for the outcrossing experiments. Stem pigmentation, red (R- vs. green (rr, was used as a genetic marker in the estimation of outcrossing. Homozygous dominant and recessive genotypes of Jamaican Red and Jamaican Green, respectively, were grown in both of the planting arrangements and dates. Seeds from open-pollinated capsules of randomly selected Jamaican Green plants were planted to score the frequency of cross-pollination. Estimates of natural cross-pollination ranged from 0.20 ± 0.09% to 0.68 ± 0.34%. Roselle outcrosses at a low rate in Jamaica.

  19. Synthesis, Characterization and Evaluation of the Transformations in Hibiscus sabdariffa-graft-poly(butyl acrylate

    Directory of Open Access Journals (Sweden)

    B. S. Kaith

    2008-01-01

    Full Text Available Different reaction parameters for the graft copolymerization of butyl acrylate onto Hibiscus sabdariffa fiber were optimized. Graft copolymers thus obtained were subjected to characterization using XRD, TGA, DTA, SEM and FTIR techniques and were evaluated for physio-chemical changes in the behavior. The percentage crystallinity and crystallinity index were found to decrease with increase in grafting while there was reduction in moisture absorption and increase in chemical, thermal resistance of the graft copolymers.

  20. CARACTERIZACIÓN QUÍMICA Y COLORIMÉTRICA DE CULTIVARES DE JAMAICA (Hibiscus sabdariffa L.)

    OpenAIRE

    Camelo Méndez, Gustavo Adolfo

    2013-01-01

    La jamaica (Hibiscus sabdariffa L.) se destaca por su alto contenido en antocianinas y potencial actividad antioxidante. En la medicina tradicional se usa como: bactericida, diurético, cicatrizante y laxante entre otros. Actualmente, en México existen programas de mejoramiento genético tradicional de materiales, que han generado materiales de esta planta con diversos grados de pigmentación y tolerancia a plagas y enfermedades. El objetivo de este trabajo fue caracterizar químic...

  1. THE MODEL OF LINGUISTIC TEACHERS’ COMPETENCY DEVELOPMENT ON DESIGNING MULTIMEDIA ELECTRONIC EDUCATIONAL RESOURCES IN THE MOODLE SYSTEM

    Directory of Open Access Journals (Sweden)

    Anton M. Avramchuk

    2017-10-01

    Full Text Available The article is devoted to the problem of developing the competency of teachers of language disciplines on designing multimedia electronic educational resources in the Moodle system. The concept of "the competence of teachers of language disciplines on designing multimedia electronic educational resources in the Moodle system" is justified and defined. Identified and characterized the components by which the levels of the competency development of teachers of language disciplines on designing multimedia electronic educational resources in the Moodle system should be assessed. Developed a model for the development of the competency of teachers of language disciplines on designing multimedia electronic educational resources in the Moodle system, which is based on the main scientific approaches, used in adult education, and consists of five blocks: target, informative, technological, diagnostic and effective.

  2. Developing Humanities Collections in the Digital Age: Exploring Humanities Faculty Engagement with Electronic and Print Resources

    Science.gov (United States)

    Kachaluba, Sarah Buck; Brady, Jessica Evans; Critten, Jessica

    2014-01-01

    This article is based on quantitative and qualitative research examining humanities scholars' understandings of the advantages and disadvantages of print versus electronic information resources. It explores how humanities' faculty members at Florida State University (FSU) use print and electronic resources, as well as how they perceive these…

  3. Determination of suitable microspore stage and callus induction from anthers of kenaf (Hibiscus cannabinus L.).

    Science.gov (United States)

    Ibrahim, Ahmed Mahmood; Kayat, Fatimah Binti; Hussin, Zeti Ermiena Surya Mat; Susanto, Dwi; Ariffulah, Mohammed

    2014-01-01

    Kenaf (Hibiscus cannabinus L.) is one of the important species of Hibiscus cultivated for fiber. Availability of homozygous parent lines is prerequisite to the use of the heterosis effect reproducible in hybrid breeding. The production of haploid plants by anther culture followed by chromosome doubling can be achieved in short period compared with inbred lines by conventional method that requires self pollination of parent material. In this research, the effects of the microspore developmental stage, time of flower collection, various pretreatments, different combinations of hormones, and culture condition on anther culture of KB6 variety of Kenaf were studied. Young flower buds with immature anthers at the appropriate stage of microspore development were sterilized and the anthers were carefully dissected from the flower buds and subjected to various pretreatments and different combinations of hormones like NAA, 2,4-D, Kinetin, BAP, and TDZ to induce callus. The best microspore development stage of the flower buds was about 6-8 mm long collected 1-2 weeks after flower initiation. At that stage, the microspores were at the uninucleate stage which was suitable for culture. The best callus induction frequency was 90% in the optimized semisolid MS medium fortified with 3.0 mg/L BAP + 3.0 mg/L NAA.

  4. Determination of Suitable Microspore Stage and Callus Induction from Anthers of Kenaf (Hibiscus cannabinus L.

    Directory of Open Access Journals (Sweden)

    Ahmed Mahmood Ibrahim

    2014-01-01

    Full Text Available Kenaf (Hibiscus cannabinus L. is one of the important species of Hibiscus cultivated for fiber. Availability of homozygous parent lines is prerequisite to the use of the heterosis effect reproducible in hybrid breeding. The production of haploid plants by anther culture followed by chromosome doubling can be achieved in short period compared with inbred lines by conventional method that requires self pollination of parent material. In this research, the effects of the microspore developmental stage, time of flower collection, various pretreatments, different combinations of hormones, and culture condition on anther culture of KB6 variety of Kenaf were studied. Young flower buds with immature anthers at the appropriate stage of microspore development were sterilized and the anthers were carefully dissected from the flower buds and subjected to various pretreatments and different combinations of hormones like NAA, 2,4-D, Kinetin, BAP, and TDZ to induce callus. The best microspore development stage of the flower buds was about 6–8 mm long collected 1-2 weeks after flower initiation. At that stage, the microspores were at the uninucleate stage which was suitable for culture. The best callus induction frequency was 90% in the optimized semisolid MS medium fortified with 3.0 mg/L BAP + 3.0 mg/L NAA.

  5. Determination of Suitable Microspore Stage and Callus Induction from Anthers of Kenaf (Hibiscus cannabinus L.)

    Science.gov (United States)

    Binti Kayat, Fatimah; Ermiena Surya Mat Hussin, Zeti; Susanto, Dwi; Ariffulah, Mohammed

    2014-01-01

    Kenaf (Hibiscus cannabinus L.) is one of the important species of Hibiscus cultivated for fiber. Availability of homozygous parent lines is prerequisite to the use of the heterosis effect reproducible in hybrid breeding. The production of haploid plants by anther culture followed by chromosome doubling can be achieved in short period compared with inbred lines by conventional method that requires self pollination of parent material. In this research, the effects of the microspore developmental stage, time of flower collection, various pretreatments, different combinations of hormones, and culture condition on anther culture of KB6 variety of Kenaf were studied. Young flower buds with immature anthers at the appropriate stage of microspore development were sterilized and the anthers were carefully dissected from the flower buds and subjected to various pretreatments and different combinations of hormones like NAA, 2,4-D, Kinetin, BAP, and TDZ to induce callus. The best microspore development stage of the flower buds was about 6–8 mm long collected 1-2 weeks after flower initiation. At that stage, the microspores were at the uninucleate stage which was suitable for culture. The best callus induction frequency was 90% in the optimized semisolid MS medium fortified with 3.0 mg/L BAP + 3.0 mg/L NAA. PMID:24757416

  6. Preliminary Study on Kinetic Solid-Liquid Extraction and Bio-Active Components Analysis of Hibiscus rosa-sinensis Leaves

    International Nuclear Information System (INIS)

    Saiful Irwan Zubairi; Haizulizam Suradi; Syazwan Aizad Abdul Mutalib; Zetty Shafiqa Othman; Norshahida Bustaman; Wan Ros Maryana Wan Musa

    2014-01-01

    Hibiscus rosa-sinensis or commonly known as 'Hibiscus' is a kind of decorative flowers which often grown in a subtropical countries. This plant is often used in the preparation of traditional medicine because of its pharmacological properties that are capable of treating number of health problems. The plant contains several essential bio-active substances and nutrients especially in its flowers and leaves. One of the bioactive substances is β-sitosterol which is abundant in the leaf crude extract. Hibiscus leaves water extract yielded mucilage which is widely used in lowering high body temperature due to fever (antipyretic). Therefore, the main objective of this paper was to determine the maximum concentration of mucilage and time of exhaustive extraction from fresh and dried leaves using a Peleq's mathematical model. Moreover, several analyses were conducted such as qualitative analysis to determine the presence of bioactive substances using high performance liquid chromatography (HPLC) and determination of functional groups by means of fourier transform infrared method (FTIR). Physical properties of the extracts were evaluated to determine its acidity and viscosity of the mucilage with respect to different shear stress. The result show that the extract of dried Hibiscus leaves exhibited high in its concentrations even though the achieved exhaustive extraction was relatively slow as compared to fresh leaves (p < 0.05). Based on the HPLC analysis, the main bio-active substances of β-sitosterol was only existed in fresh leaves samples. The absence of β-sitosterol in dried leaves extract was caused by the loss of other important bio-active substances which possess surfactant capability, due to thermal degradation of drying process or the component itself was deteriorated during the pre-preparation drying process. Furthermore, the FTIR analysis shows that the same composition of the absorption peaks for both extracts with the highest absorption of O-H bonds was

  7. Anthocyanin-rich extract from Hibiscus sabdariffa calyx counteracts UVC-caused impairments in rats.

    Science.gov (United States)

    Ozkol, Hatice Uce; Koyuncu, Ismail; Tuluce, Yasin; Dilsiz, Nihat; Soral, Sinan; Ozkol, Halil

    2015-01-01

    Ultraviolet radiation (UV) was reported to cause oxidative stress. Hibiscus sabdariffa L. (Malvaceae) calyx is commonly used in traditional Asian and African medicines and possesses strong antioxidant capacity due to its anthocyanin (ANTH) content. This study researched the possible protective role of Hibiscus sabdariffa calyx extract (HSCE) in UVC exposure of rats. Levels of serum enzymes, renal function tests, and some oxidant/antioxidant biomarkers of skin, lens, and retina tissues were monitored. Rats were exposed to UVC 4 h daily for 40 d and simultaneously received HSCE containing 2.5, 5, and 10 mg doses of ANTH in drinking water. Significant (p < 0.05) increases in the levels of serum aminotransferases, lactate dehydrogenase, urea, creatinine, and uric acid were noted after UVC exposure. In skin, lens, and retina tissues, total oxidant status, oxidative stress index, lipid peroxidation, and protein oxidation escalated markedly (p < 0.05) whereas total antioxidant status, reduced glutathione, and superoxide dismutase decreased dramatically (p < 0.05) related to UVC. Co-administration of HSCE with each ANTH dose significantly (p < 0.05) reversed aforementioned parameters (except total oxidant status) almost in all tissues. The LD50 of HSCE in rats was determined to be above 5000 mg/kg. Our data revealed that HSCE has a remarkable potential to counteract UVC-caused impairments, probably through its antioxidant and free radical-defusing effects. Therefore, HSCE could be useful against some cutaneous and ocular diseases in which UV and oxidative stress have a role in the etiopathogenesis.

  8. Chesapeake Bay Low Freshwater Inflow Study. Biota Assessment. Phase I. Appendices.

    Science.gov (United States)

    1980-08-01

    Resources Coastal Resources Power Plant Siting Maryland Geological Survey Maryland Environmental Health Administration university of Maryland Marine...are very common: Acorus calamus Polygonum spp. Hibiscus palustris Pontederia cordata Leersia spp. Sagittaria latifolia Nuphar leiteum Typha... Hibiscus ) penetrate to mesohaline salinities. In general, the fresh water marsh associations are limited to areas upstream of 3 - 50Xsalinity

  9. Development and evaluation of Ketoprofen sustained release matrix tablet using Hibiscus rosa-sinensis leaves mucilage

    OpenAIRE

    Kaleemullah, M.; Jiyauddin, K.; Thiban, E.; Rasha, S.; Al-Dhalli, S.; Budiasih, S.; Gamal, O.E.; Fadli, A.; Eddy, Y.

    2016-01-01

    Currently, the use of natural gums and mucilage is of increasing importance in pharmaceutical formulations as valuable drug excipient. Natural plant-based materials are economic, free of side effects, biocompatible and biodegradable. Therefore, Ketoprofen matrix tablets were formulated by employing Hibiscus rosa-sinensis leaves mucilage as natural polymer and HPMC (K100M) as a synthetic polymer to sustain the drug release from matrix system. Direct compression method was used to develop susta...

  10. Kenaf as a potential source of pulp in Australia. Proceedings of Kenaf Conference, May 28-29, 1981, Brisbane, Queensland. [Hibiscus Cannabinus

    Energy Technology Data Exchange (ETDEWEB)

    Wood, I.M.; Stewart, G.A. (eds.)

    1981-01-01

    Papers by different authors are presented in 8 sections on kenaf (Hibiscus cannabinus), a possible substitute for wood pulp. Agronomy and physiology; Selection and breeding; Pests and diseases; By-products; Harvesting; Farming systems; Pulping techniques; and Economics and marketing.

  11. Mucilage-secreting structures of Hibiscus pernambucensis Arruda (Malvaceae): distribution, morphoanatomical and histochemical characterization

    OpenAIRE

    Rocha, Joecildo Francisco; Pimentel, Rafael Ribeiro; Machado, Silvia Rodrigues [UNESP

    2011-01-01

    No presente trabalho foram estudadas as estruturas secretoras de mucilagem de Hibiscus pernambucensis aos microscópios de luz e de varredura. Conhecida como guaxima-do-mangue e algodão-do-brejo, é espécie nativa encontrada no litoral brasileiro, vegetando áreas de manguezal e restinga, tendo grande importância ecológica nestes ecossistemas. É importante produtora de fibras têxteis e celulose, fornece abundante mucilagem suscetível das mesmas aplicações medicinais de outras malváceas, além da ...

  12. Bioclimatic thresholds, thermal constants and survival of mealybug, Phenacoccus solenopsis (hemiptera: pseudococcidae) in response to constant temperatures on hibiscus.

    Science.gov (United States)

    Sreedevi, Gudapati; Prasad, Yenumula Gerard; Prabhakar, Mathyam; Rao, Gubbala Ramachandra; Vennila, Sengottaiyan; Venkateswarlu, Bandi

    2013-01-01

    Temperature-driven development and survival rates of the mealybug, Phenacoccussolenopsis Tinsley (Hemiptera: Pseudococcidae) were examined at nine constant temperatures (15, 20, 25, 27, 30, 32, 35 and 40°C) on hibiscus (Hibiscusrosa -sinensis L.). Crawlers successfully completed development to adult stage between 15 and 35°C, although their survival was affected at low temperatures. Two linear and four nonlinear models were fitted to describe developmental rates of P. solenopsis as a function of temperature, and for estimating thermal constants and bioclimatic thresholds (lower, optimum and upper temperature thresholds for development: Tmin, Topt and Tmax, respectively). Estimated thresholds between the two linear models were statistically similar. Ikemoto and Takai's linear model permitted testing the equivalence of lower developmental thresholds for life stages of P. solenopsis reared on two hosts, hibiscus and cotton. Thermal constants required for completion of cumulative development of female and male nymphs and for the whole generation were significantly lower on hibiscus (222.2, 237.0, 308.6 degree-days, respectively) compared to cotton. Three nonlinear models performed better in describing the developmental rate for immature instars and cumulative life stages of female and male and for generation based on goodness-of-fit criteria. The simplified β type distribution function estimated Topt values closer to the observed maximum rates. Thermodynamic SSI model indicated no significant differences in the intrinsic optimum temperature estimates for different geographical populations of P. solenopsis. The estimated bioclimatic thresholds and the observed survival rates of P. solenopsis indicate the species to be high-temperature adaptive, and explained the field abundance of P. solenopsis on its host plants.

  13. Electronic resource management systems a workflow approach

    CERN Document Server

    Anderson, Elsa K

    2014-01-01

    To get to the bottom of a successful approach to Electronic Resource Management (ERM), Anderson interviewed staff at 11 institutions about their ERM implementations. Among her conclusions, presented in this issue of Library Technology Reports, is that grasping the intricacies of your workflow-analyzing each step to reveal the gaps and problems-at the beginning is crucial to selecting and implementing an ERM. Whether the system will be used to fill a gap, aggregate critical data, or replace a tedious manual process, the best solution for your library depends on factors such as your current soft

  14. Ana Delia, mutant of Jamaica flower (Hibiscus sabdariffa sp.) obtained in Cuba through mutation induction with gamma-rays of 60Co

    International Nuclear Information System (INIS)

    Gonzalez Cepero, Maria C; Trujillo Gil, Delfina; Teran Vidaly, Zoilo; Altane Valentin, Sonia

    2011-01-01

    At the National Institute of Agricultural Sciences was obtained a mutant of Hibiscus sabdariffa variety that differs from the donor (Yersy) in the cycle, color of leaves,stems, flowers and fruits in the form of leaves and yield per plant

  15. Electronic Resource Management System. Vernetzung von Lizenzinformationen

    Directory of Open Access Journals (Sweden)

    Michaela Selbach

    2014-12-01

    Full Text Available In den letzten zehn Jahren spielen elektronische Ressourcen im Bereich der Erwerbung eine zunehmend wichtige Rolle: Eindeutig lässt sich hier ein Wandel in den Bibliotheken (fort vom reinen Printbestand zu immer größeren E-Only-Beständen feststellen. Die stetig wachsende Menge an E-Ressourcen und deren Heterogenität stellt Bibliotheken vor die Herausforderung, die E-Ressourcen effizient zu verwalten. Nicht nur Bibliotheken, sondern auch verhandlungsführende Institutionen von Konsortial- und Allianzlizenzen benötigen ein geeignetes Instrument zur Verwaltung von Lizenzinformationen, welches den komplexen Anforderungen moderner E-Ressourcen gerecht wird. Die Deutsche Forschungsgemeinschaft (DFG unterstützt ein Projekt des Hochschulbibliothekszentrums des Landes Nordrhein-Westfalen (hbz, der Universitätsbibliothek Freiburg, der Verbundzentrale des Gemeinsamen Bibliotheksverbundes (GBV und der Universitätsbibliothek Frankfurt, in dem ein bundesweit verfügbares Electronic Ressource Managementsystem (ERMS aufgebaut werden soll. Ein solches ERMS soll auf Basis einer zentralen Knowledge Base eine einheitliche Nutzung von Daten zur Lizenzverwaltung elektronischer Ressourcen auf lokaler, regionaler und nationaler Ebene ermöglichen. Statistische Auswertungen, Rechteverwaltung für alle angeschlossenen Bibliotheken, kooperative Datenpflege sowie ein über standardisierte Schnittstellen geführter Datenaustausch stehen bei der Erarbeitung der Anforderungen ebenso im Fokus wie die Entwicklung eines Daten- und Funktionsmodells. In the last few years the importance of electronic resources in library acquisitions has increased significantly. There has been a shift from mere print holdings to both e- and print combinations and even e-only subscriptions. This shift poses a double challenge for libraries: On the one hand they have to provide their e-resource collections to library users in an appealing way, on the other hand they have to manage these

  16. Okra (Hibiscus esculentus) seed oil for biodiesel production

    Energy Technology Data Exchange (ETDEWEB)

    Anwar, Farooq; Nadeem, Muhammad [Department of Chemistry and Biochemistry, University of Agriculture, Faisalabad 38040 (Pakistan); Rashid, Umer [Department of Chemistry and Biochemistry, University of Agriculture, Faisalabad 38040 (Pakistan); Department of Industrial Chemistry, Government College University, Faisalabad 38000 (Pakistan); Ashraf, Muhammad [Department of Botany, University of Agriculture, Faisalabad 38040 (Pakistan)

    2010-03-15

    Biodiesel was derived from okra (Hibiscus esculentus) seed oil by methanol-induced transesterification using an alkali catalyst. Transesterification of the tested okra seed oil under optimum conditions: 7:1 methanol to oil molar ratio, 1.00% (w/w) NaOCH{sub 3} catalyst, temperature 65 C and 600 rpm agitation intensity exhibited 96.8% of okra oil methyl esters (OOMEs) yield. The OOMEs/biodiesel produced was analyzed by GC/MS, which showed that it mainly consisted of four fatty acids: linoleic (30.31%), palmitic (30.23%), oleic (29.09%) and stearic (4.93%). A small amount of 2-octyl cyclopropaneoctanoic acid with contribution 1.92% was also established. Fuel properties of OOMEs such as density, kinematic viscosity, cetane number, oxidative stability, lubricity, flash point, cold flow properties, sulfur contents and acid value were comparable with those of ASTM D 6751 and EN 14214, where applicable. It was concluded that okra seed oil is an acceptable feedstock for biodiesel production. (author)

  17. Fatty Acid Composition of Hibiscus trionum L. (Malvaceae

    Directory of Open Access Journals (Sweden)

    Ceyda Sibel Kılıç

    2011-01-01

    Full Text Available The genus Hibiscus plants have different uses, some are used as foods (H. esculenta L., and some species as remedy in traditional medicine (H. sabdariffa L. as well as a colorant for herbal teas. The only species that grows naturally in Turkey is H. trionum L. The plant especially infests soy and corn fields, and therefore it is considered to be a noxious weed. The plant is also found to be a host for Potato Virus Y (PVY and Tomato Spotted Wilt Virus (TSWV. Infestation of the crop fields by this plant shows that it germinates easily. Since it produces many seeds, distribution of the plant is also quiet easy. Though, seed oil yield is low (4.7% since linoleic acid composition of the seed oil is quiet high (67,5%, it can still be used as a source of unsaturated fatty acids. The other major fatty acids are palmitic, oleic and stearic acids in the studied seed oil .

  18. The Electron Microscopy Outreach Program: A Web-based resource for research and education.

    Science.gov (United States)

    Sosinsky, G E; Baker, T S; Hand, G; Ellisman, M H

    1999-01-01

    We have developed a centralized World Wide Web (WWW)-based environment that serves as a resource of software tools and expertise for biological electron microscopy. A major focus is molecular electron microscopy, but the site also includes information and links on structural biology at all levels of resolution. This site serves to help integrate or link structural biology techniques in accordance with user needs. The WWW site, called the Electron Microscopy (EM) Outreach Program (URL: http://emoutreach.sdsc.edu), provides scientists with computational and educational tools for their research and edification. In particular, we have set up a centralized resource containing course notes, references, and links to image analysis and three-dimensional reconstruction software for investigators wanting to learn about EM techniques either within or outside of their fields of expertise. Copyright 1999 Academic Press.

  19. Technical Communicator: A New Model for the Electronic Resources Librarian?

    Science.gov (United States)

    Hulseberg, Anna

    2016-01-01

    This article explores whether technical communicator is a useful model for electronic resources (ER) librarians. The fields of ER librarianship and technical communication (TC) originated and continue to develop in relation to evolving technologies. A review of the literature reveals four common themes for ER librarianship and TC. While the…

  20. Hibiscus sabdariffa L. and Its Bioactive Constituents Exhibit Antiviral Activity against HSV-2 and Anti-enzymatic Properties against Urease by an ESI-MS Based Assay.

    Science.gov (United States)

    Hassan, Sherif T S; Švajdlenka, Emil; Berchová-Bímová, Kateřina

    2017-04-30

    For decades, Hibiscus sabdariffa L. and its phytochemicals have been shown to possess a wide range of pharmacologic properties. In this study, aqueous extract of Hibiscus sabdariffa (AEHS) and its bioactive constituent protocatechuic acid (PCA), have been evaluated in vitro for their antiviral activity against HSV-2 clinical isolates and anti-enzymatic activity against urease. Antiherpetic activity was evaluated by the titer reduction assay in infected Vero cells, and cytotoxicity was evaluated by the neutral red dye-uptake method. Anti-urease activity was determined by a developed Electrospray Ionization-Mass Spectrometry (ESI-MS)-based assay. PCA showed potent anti-HSV-2 activity compared with that of acyclovir, with EC 50 values of 0.92 and 1.43 µg∙mL -1 , respectively, and selectivity indices > 217 and > 140, respectively. For the first time, AEHS was shown to exert anti-urease inhibition activity, with an IC 50 value of 82.4 µg∙mL -1 . This, combined with its safety, could facilitate its use in practical applications as a natural urease inhibitor. Our results present Hibiscus sabdariffa L. and its bioactive compound PCA as potential therapeutic agents in the treatment of HSV-2 infection and the treatment of diseases caused by urease-producing bacteria.

  1. Hibiscus sabdariffa L. and Its Bioactive Constituents Exhibit Antiviral Activity against HSV-2 and Anti-enzymatic Properties against Urease by an ESI-MS Based Assay

    Directory of Open Access Journals (Sweden)

    Sherif T. S. Hassan

    2017-04-01

    Full Text Available For decades, Hibiscus sabdariffa L. and its phytochemicals have been shown to possess a wide range of pharmacologic properties. In this study, aqueous extract of Hibiscus sabdariffa (AEHS and its bioactive constituent protocatechuic acid (PCA, have been evaluated in vitro for their antiviral activity against HSV-2 clinical isolates and anti-enzymatic activity against urease. Antiherpetic activity was evaluated by the titer reduction assay in infected Vero cells, and cytotoxicity was evaluated by the neutral red dye-uptake method. Anti-urease activity was determined by a developed Electrospray Ionization-Mass Spectrometry (ESI-MS-based assay. PCA showed potent anti-HSV-2 activity compared with that of acyclovir, with EC50 values of 0.92 and 1.43 µg∙mL−1, respectively, and selectivity indices > 217 and > 140, respectively. For the first time, AEHS was shown to exert anti-urease inhibition activity, with an IC50 value of 82.4 µg∙mL−1. This, combined with its safety, could facilitate its use in practical applications as a natural urease inhibitor. Our results present Hibiscus sabdariffa L. and its bioactive compound PCA as potential therapeutic agents in the treatment of HSV-2 infection and the treatment of diseases caused by urease-producing bacteria.

  2. Physiological responses and tolerance of kenaf (Hibiscus cannabinus L.) exposed to chromium.

    Science.gov (United States)

    Ding, Han; Wang, Guodong; Lou, Lili; Lv, Jinyin

    2016-11-01

    Selection of kenaf species with chromium (Cr) tolerance and exploring the physiological mechanisms involved in Cr tolerance are crucial for application of these species to phyto-remediation. In the present study, a hydroponic experiment was conducted to investigate the variation in two kenaf cultivars, K39-2 and Zhe50-3 under Cr stress. At the same Cr concentration, the tolerance index (TI) of K39-2 was higher than that of Zhe50-3, indicating that K39-2 may be more tolerant to Cr than Zhe50-3. It was also observed that high concentration of chromium was accumulated both in the shoots and the roots of Hibiscus cannabinus L. The leaves of K39-2 accumulated 4760.28mgkg(-1) of dry weight under 1.50mM Cr stress, and the roots accumulated 11,958.33mgkg(-1). Physiological response shows that the antioxidant enzymes' superoxide dismutase (SOD), catalase activity (CAT) and peroxidase (POD) activities increased in the leaves and decreased in roots of the Cr-stressed plants nearly compared to the control. Moreover, the variation of antioxidant enzymes activities indicated Zhe50-3 was more vulnerable than K39-2, and the contents of the non-protein thiol pool (GSH, NPT and PCs) were higher in K39-2 than Zhe50-3 with the increased Cr concentration. Based on the observations above, it can be concluded that the well-coordinated physiological changes confer a greater Cr tolerance to K39-2 than Zhe50-3 under Cr exposure, and Hibiscus cannabinus L. has a great accumulation capacity for chromium. Copyright © 2016 Elsevier Inc. All rights reserved.

  3. Antioxidant Actions Of Irradiated Hibiscus SABDARIFFA L. (KARKADE) Against Monosodium Glutamate-Induced Oxidative Stress In Rats

    International Nuclear Information System (INIS)

    FARAG, M.F.S.; OSMAN, N.N.

    2009-01-01

    Monosodium glutamate (MSG) continues to function as a flavour enhancer in diets. Aqueous extract of dried flowers of irradiated Hibiscus sabdariffa L. (HS), (Karkade), was investigated for its antioxidant action in MSG treated rats. MSG was injected intraperitoneally at a dose of 4 mg/g body weight for 15 days to male Wistar rats. Lipid peroxidation as thiobarbituric acid reactive substances (TBARS) and the antioxidants superoxide dismutase (SOD), catalase (CAT) and reduced glutathione (GSH) were examined in brain, heart, kidney and testes. MSG markedly increases the TBARS formation in rat organs. Meanwhile, it decreased significantly the activities of SOD and CAT in the same examined organs. The GSH level was also reduced due to MSG. In MSG treated rats, simultaneous oral administration of HS water extract (HSAE; 540 mg /kg/day) significantly reduced the MSG mediated increase in TBARS. Moreover, the administered HSAE was effective in ameliorating the changes in the activities of SOD and CAT in the examined organs. It also restored the decrease in GSH content. Overall, these findings are suggestive of the protective and the possible anti oxidative role played by dried flowers of Hibiscus sabdariffa L. against the oxidative damage due to MSG administration to rats.

  4. Hibiscus anthocyanins rich extract-induced apoptotic cell death in human promyelocytic leukemia cells

    International Nuclear Information System (INIS)

    Chang, Y.-C.; Huang, H.-P.; Hsu, J.-D.; Yang, S.-F.; Wang, C.-J.

    2005-01-01

    Hibiscus sabdariffa Linne (Malvaceae), an attractive plant believed to be native to Africa, is cultivated in the Sudan and Eastern Taiwan. Anthocyanins exist widely in many vegetables and fruits. Some reports demonstrated that anthocyanins extracted from H. sabdariffa L., Hibiscus anthocyanins (HAs) (which are a group of natural pigments existing in the dried calyx of H. sabdariffa L.) exhibited antioxidant activity and liver protection. Therefore, in this study, we explored the effect of HAs on human cancer cells. The result showed that HAs could cause cancer cell apoptosis, especially in HL-60 cells. Using flow cytometry, we found that HAs treatment (0-4 mg/ml) markedly induced apoptosis in HL-60 cells in a dose- and time-dependent manner. The result also revealed increased phosphorylation in p38 and c-Jun, cytochrome c release, and expression of tBid, Fas, and FasL in the HAs-treated HL-60 cells. We further used SB203580 (p38 inhibitor), PD98059 (MEK inhibitor), SP600125 (JNK inhibitor), and wortmannin (phosphatidylinositol 3-kinase; PI-3K inhibitor) to evaluate their effect on the HAs-induced HL-60 death. The data showed that only SB203580 had strong potential in inhibiting HL-60 cell apoptosis and related protein expression and phosphorylation. Therefore, we suggested that HAs mediated HL-60 apoptosis via the p38-FasL and Bid pathway. According to these results, HAs could be developed as chemopreventive agents. However, further investigations into the specificity and mechanism(s) of HAs are needed

  5. MODEL OF AN ELECTRONIC EDUCATIONAL RESOURCE OF NEW GENERATION

    Directory of Open Access Journals (Sweden)

    Anatoliy V. Loban

    2016-01-01

    Full Text Available The mathematical structure of the modular architecture of an electronic educational resource (EER of new generation, which allows to decompose the process of studying the subjects of the course at a hierarchically ordered set of data (knowledge and procedures for manipulating them, to determine the roles of participants of process of training of and technology the development and use of EOR in the study procrate.

  6. Occurrence of Root Rot and Vascular Wilt Diseases in Roselle (Hibiscus sabdariffa L.) in Upper Egypt

    OpenAIRE

    Hassan, Naglaa; Shimizu, Masafumi; Hyakumachi, Mitsuro

    2014-01-01

    Roselle (Hibiscus sabdariffa L.) family Malvaceae is an important crop used in food, cosmetics and pharmaceutics industries. Roselle is cultivated mainly in Upper Egypt (Qena and Aswan governorates) producing 94% of total production. Root rot disease of roselle is one of the most important diseases that attack both seedlings and adult plants causing serious losses in crop productivity and quality. The main objective of the present study is to identify and characterize pathogens associated wit...

  7. Comparison studies on catalytic properties of silver nanoparticles biosynthesized via aqueous leaves extract of Hibiscus rosa sinensis and Imperata cylindrica

    Science.gov (United States)

    Fairuzi, Afiza Ahmad; Bonnia, Noor Najmi; Akhir, Rabiatuladawiyah Md.; Akil, Hazizan Md; Yahya, Sabrina M.; Rahman, Norafifah A.

    2018-05-01

    Synthesis of silver nanoparticles has been developed by using aqueous leaves extract (ALE) of Hibiscus rosa sinensis (H. rosa sinensis) and Imperata cylindrica (I. cylindrica). Both plants extract acts as reducing and capping agent. The colour change in reaction mixture (pale yellow to dark brown) was observed during the synthesis process. The formation of silver nanoparticles was confirmed by surface Plasmon Resonance (SPR) at range 300-700 nm for both leaves using UV-Vis Spectroscopy. The reduction of silver ions to silver nanoparticles was completed within 2 hour for H. rosa sinensis and 30 minutes for I. cylindrica extract. The synthesized nanoparticles were characterized using UV-Vis spectroscopy, field emission scanning electron microscope (FESEM) and Fourier transform infrared (FTIR) spectroscopy. The morphology of silver nanoparticles was found to be different when synthesized using different plant extract. In addition, this study also reported on the effect of silver nanoparticles on the degradation of organic dye by sodium borohydride (NaBH4). The silver nanoparticles synthesis by aqueous leaf extract demonstrates rapid, simple and inexpensive method compared to the conventional physical and physical methods. The efficiency of silver nanoparticles as a promising candidate for the catalysis of organic dyes by NaBH4 through the electron transfer is established in the present study.

  8. Review Hepatoprotektor Rosela (Hibiscus sabdariffa: Aktivitas, Mekanisme Aksi dan Toksisitas

    Directory of Open Access Journals (Sweden)

    Steffi Liem

    2017-12-01

    Full Text Available Liver cirrhosis has become the international health problem that causes significant mortality. Handling using herbs from various countries has been done, one of them by consuming roselle (Hibiscus sabdariffa calyx extract. H. sabdariffa contains anthocyanins, flavonoids, tannins, and ascorbic acid that function as hepatoprotector. H. sabdariffacalyx extract may inhibit the increasing of various clinical parameters, such as ALT, AST, ALP, and LDH in various inducer types, ie acetaminophen, CCl4, CdCl2, DNPH, and TAA. The mechanism of action of H. sabdariffacalyx extract are as an antioxidant, inhibition of cytochrome enzyme, induction of phase II metabolism enzymes, increase cell viability percentage, increase CAT, GSH and decrease protein expression of pJNK, tBid and Bax. However, the consumption of H. sabdariffacalyx extract may also cause acute, subchronic, and chronic toxicity depending on the given dose.

  9. Hibiscus sabdariffa extract lowers blood pressure and improves endothelial function.

    Science.gov (United States)

    Joven, Jorge; March, Isabel; Espinel, Eugenia; Fernández-Arroyo, Salvador; Rodríguez-Gallego, Esther; Aragonès, Gerard; Beltrán-Debón, Raúl; Alonso-Villaverde, Carlos; Rios, Lidia; Martin-Paredero, Vicente; Menendez, Javier A; Micol, Vicente; Segura-Carretero, Antonio; Camps, Jordi

    2014-06-01

    Polyphenols from Hibiscus sabdariffa calices were administered to patients with metabolic syndrome (125 mg/kg/day for 4 wk, n = 31) and spontaneously hypertensive rats (125 or 60 mg/kg in a single dose or daily for 1 wk, n = 8 for each experimental group). The H. sabdariffa extract improved metabolism, displayed potent anti-inflammatory and antioxidant activities, and significantly reduced blood pressure in both humans and rats. Diuresis and inhibition of the angiotensin I-converting enzyme were found to be less important mechanisms than those related to the antioxidant, anti-inflammatory, and endothelium-dependent effects to explain the beneficial actions. Notably, polyphenols induced a favorable endothelial response that should be considered in the management of metabolic cardiovascular risks. © 2014 The Authors. Molecular Nutrition & Food Research published by Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

  10. Factors influencing extract of Hibiscus sabdariffa staining of rat testes.

    Science.gov (United States)

    Bassey, R B; Bakare, A A; Peter, A I; Oremosu, A A; Osinubi, A A

    2012-08-01

    Some plant extracts can be used in biology and medicine to reveal or identify cellular components and tissues. We investigated the effects of time and concentration on staining of histological sections of rat testes by an acidified extract of Hibiscus sabdariffa. An ethanolic extract of H. sabdariffa was diluted using 1% acetic acid in 70% ethanol to stain histological sections of testes at concentrations of 0.2, 0.1 and 0.05 g/ml for 5, 10, 15, 30, 45 and 60 min. The sections of testes were stained deep red. The staining efficiency of H. sabdariffa was greater at a high concentration and required less time to achieve optimal staining. H. sabdariffa is a strongly basic dye that can be used for various diagnostic purposes. Staining time and concentration must be considered to achieve optimal results.

  11. Comparative study of the anti-oxidant activity of the total polyphenols extracted from Hibiscus Sabdariffa L., Glycine max L. Merr., yellow tea and red wine through reaction with DPPH free radicals

    Directory of Open Access Journals (Sweden)

    T. Andzi Barhé

    2016-01-01

    Full Text Available The present study is part of the evaluation of extracts of Glycine max L. Merr and Hibiscus L. Sabdariffa as antioxidants. A comparative study was performed with extracts of yellow tea and commercial red wine, two foods known for their antioxidant activity. The method applied is free radical scavenging using the 1,1-diphenyl-2-picrylhydrazyl (DPPH°. The antioxidant properties were identified and measured by the determining the anti-radical activity reducing index, expressed in percentage % RSA (Radical Scavenger Activity, and by the determination of the colouring intensity (IC50. All results are compared to those of ascorbic acid as reference antioxidant. The results indicate the following order for the antioxidant power of the extracts tested. % RSA (tea > % RSA (Glycine max % > RSA (red wine % > RSA (Sabdariffa Hibiscus, and colouring intensities (IC50 ranging from 4.62 μM (ascorbic acid to 1.10 μM (Hibiscus sabdariffa correlated with their chemical structure and the content of phenolic compounds.

  12. Study of the effects of Cobalt 60 gamma radiations on the seeds of two textile hibiscus species. Influence of seed water content on their radiosensitivity. Mutagenic effects on two plantlet generation

    International Nuclear Information System (INIS)

    Mahama, Adamou.

    1980-10-01

    This work on textile hibiscus was undertaken for two reasons: to contribute by physical mutagenesis methods to the genetic improvement of these species and especially to obtain the genetic diversity which is seriously lacking in the species sabdariffa var. altissima; to add to research on the effects of mutagenic seed treatments and thus to help towards a better definition of optimum seed irradiation conditions. These two purposes have been fulfilled. The main results may be summed up as follows. - Concerning the improvement of textile hibiscus. Many strains with various new features were selected at the second generation and may lead either to new varieties or at least to interesting precursors for selection programmes. In the second generation derived from Hibiscus saddariffa var. THS 22 some plants were observed with one or more of the following characteristics specific to the edible form: ramified bearing - fleshy calix - smooth leaf. - Concerning the study of mutagenic seed treatment effects. Our experiments showed up the importance of the seed water content and its effect on the response of first-generation plantlets to cobalt 60 γ-ray treatments [fr

  13. Pengaruh Pemberian Ekstrak Rosella (Hibiscus sabdariffa Linn Terhadap Kadar Malondialdehid dan Aktivitas Katalase Tikus yang Terpapar Karbon Tetraklorida

    Directory of Open Access Journals (Sweden)

    Zuraida ,

    2015-09-01

    Full Text Available Abstrak Pemberian rosella (Hibiscus sabdariffa Linn diharapkan melindung hepar tikus dari kerusakkan akibat stres oksidatif pada keracunan karbon tetraklorida (CCl 4. Senyawa yang sering dijadikan petunjuk adanya kerusakan tersebut adalah malondialdehid (MDA. Rosella mengandung vitamin C, flavonoid, polifenol dan beta karoten. Tujuanpenelitian ini adalah menentukan pengaruh pemberian ekstrak rosella (Hibiscus sabdariffa Linn terhadap MDA dan aktivitas katalase tikus yang terpapar CCl 4. Ini adalah penelitian eksperimental dengan desain Post test Only Control Group Design. Sampel 24 ekor tikus Strain Wistar berumur 2-3 bulan, berat 150-200 gr. Sampel diambil secara acakdan dibagi 4 kelompok terdiri dari kelompok kontrol negatif, kontrol positif (CCl 4, perlakuan 1 (CCl 4 dan ekstrak rosella 250 mg/kg bb dan perlakuan 2 (CCl4  dan ekstrak rosella 500 mg/kg bb. Pemberian CCl 4secara oral dosis tunggal, setelah 24 jam kemudian diberi ekstrak rosella secara oral selama 14 hari. Data dianalisis dengan uji Anova, tingkatkepercayaan 95%.Pemberian ekstrak rosella secara statistik didapatkan perbedaan yang signifikan rerata kadar MDA dan katalase antar kelompok (p < 0,05. Disimpulkan bahwa ekstrak rosella dapat menurunkan kadar MDA dan meningkatkan aktivitas katalase tikus yang terpapar CCl 4. Kata kunci: karbon tetraklorida, MDA, katalase, rosella Abstract Administering roselle (Hibiscus sabdariffa Linn is expected to protect rat liver from damage caused by oxidative stress in CCl4 poisoning. Rosella contains vitamin C, flavonoids, polyphenol and beta carotene. Compounds which was often used as marker of the damage caused by free radicals wa MDA. The objective of this study was to determine the effect of extracts of roselle (Hibiscus sabdariffa Linn on MDA and catalase activity of rats exposed to CCl4. Experimental research design with Post test Only Control Group Design. Samples of 24 male Wistar Strain rats were 2-3 months old. weighing 150-200 gr

  14. An anthocyanin-rich extract from Hibiscus sabdariffa linnaeus inhibits N-nitrosomethylurea-induced leukemia in rats.

    Science.gov (United States)

    Tsai, Tsung-Chang; Huang, Hui-Pei; Chang, Yun-Ching; Wang, Chau-Jong

    2014-02-19

    A previous study reported that anthocyanins from roselle (Hibiscus sabdariffa L.) showed significant anticancer activity in human promyelocytic leukemia cells. To explore the antitumor effect of anthocyanin, a roselle bioactive polyphenol in a rat model of chemical-induced leukemia was assayed. Anthocyanin extract of roselle (Hibiscus anthocyanins, HAs) was supplemented in the diet (0.1 and 0.2%). This study was carried out to evaluate the protective effect of HAs on N-nitrosomethylurea (NMU)-induced leukemia of rats. The study employed male Sprague-Dawley rats (n = 48), and leukemia was induced by intravenous injection of 35 mg kg(-1) body weight of NMU dissolved in physiologic saline solution. The rats were divided into four groups (n = 12): control, NMU only, and HAs groups that received different doses of HAs (0.1 and 0.2%) daily, orally, after NMU injection. After 220 days, the animals were killed, and the following parameters were assessed: morphological observation, hematology examination, histopathological assessment, and biochemical assay. When compared with the NMU-only group, HAs significantly prevented loss of organ weight and ameliorated the impairment of morphology, hematology, and histopathology. Treatment with HAs caused reduction in the levels of AST, ALT, uric acid, and MPO. Also, the results showed that oral administration of HAs (0.2%) remarkably inhibited progression of NMU-induced leukemia by approximately 33.3% in rats. This is the first report to demonstrate that the sequential administration of HAs followed by NMU resulted in an antileukemic activity in vivo.

  15. In vitro vasorelaxation mechanisms of bioactive compounds extracted from Hibiscus sabdariffa on rat thoracic aorta

    Science.gov (United States)

    Sarr, Mamadou; Ngom, Saliou; Kane, Modou O; Wele, Alassane; Diop, Doudou; Sarr, Bocar; Gueye, Lamine; Andriantsitohaina, Ramaroson; Diallo, Aminata S

    2009-01-01

    Background In this study, we suggested characterizing the vasodilator effects and the phytochemical characteristics of a plant with food usage also used in traditional treatment of arterial high blood pressure in Senegal. Methods Vascular effects of crude extract of dried and powdered calyces of Hibiscus sabdariffa were evaluated on isolated thoracic aorta of male Wistar rats on organ chambers. The crude extract was also enriched by liquid-liquid extraction. The various cyclohexane, dichloromethane, ethyl acetate, butanol extracts obtained as well as the residual marc were subjected to Sephadex LH-20 column chromatography. The different methanolic eluate fractions were then analyzed by Thin Layer (TLC) and High Performance Liquid Chromatography (HPLC) and their vascular effects also evaluated. Results The H. Sabdariffa crude extract induced mainly endothelium-dependent relaxant effects. The endothelium-dependent relaxations result from NOS activation and those who not dependent to endothelium from activation of smooth muscle potassium channels. The phytochemical analysis revealed the presence of phenolic acids in the ethyl acetate extract and anthocyans in the butanolic extract. The biological efficiency of the various studied extracts, in term of vasorelaxant capacity, showed that: Butanol extract > Crude extract > Residual marc > Ethyl acetate extract. These results suggest that the strong activity of the butanolic extract is essentially due to the presence of anthocyans found in its fractions 43-67. Conclusion These results demonstrate the vasodilator potential of hibiscus sabdariffa and contribute to his valuation as therapeutic alternative. PMID:19883513

  16. GUIDELINES FOR EVALUATION OF PSYCHOLOGICAL AND PEDAGOGICAL QUALITY CHARACTERISTICS OF ELECTRONIC EDUCATIONAL RESOURCES

    Directory of Open Access Journals (Sweden)

    Galina P. Lavrentieva

    2014-05-01

    Full Text Available The article highlights the causes of insufficient effective use of electronic learning resources and sets out the guidelines on ways to solve the aforementioned problems. The set of didactic, methodical, psychological, pedagogical, design and ergonomic quality requirements is considered for evaluation, selection and application of information and communication technologies in the educational process. The most appropriate mechanisms for the ICT introduction into the learning process are disclosed as it should meet the specific learning needs of the student and the objectives of the educational process. The guidance for psycho-educational assessment of quality of electronic educational resources is provided. It is argued that the effectiveness of the ICT use is to be improved by means of quality evaluation mechanisms involved into the educational process.

  17. Availability, Use and Constraints to Use of Electronic Information Resources by Postgraduates Students at the University of Ibadan

    Directory of Open Access Journals (Sweden)

    Dare Samuel Adeleke

    2017-12-01

    Full Text Available Availability, awareness and use of electronic resources provide access to authoritative, reliable, accurate and timely access to information. The use of electronic information resources (EIRs can enable innovation in teaching and increase timeliness in research of postgraduate students which will eventual result into encouragement of the expected research-led enquiry in this digital age. The study adopted a descriptive survey design. Samples of 300 of postgraduate students within seven out 13 Faculties were randomly selected. Data were collected using questionnaire designed to elicit response from respondents and data were analyzed using descriptive statistics methods percentages, mean, and standard deviation. Results indicated that internet was ranked most available and used in the university. Low level of usage of electronic resources, in particular, full texts data bases is linked to a number of constraints: Interrupted power supply was ranked highest among other factors as speed and capacity of computers, retrieval of records with high recall and low precision, retrieving records relevant to information need, lack of knowledge of search techniques to retrieve information effectively, non possession of requisite IT skills and problems accessing the internet. The study recommended that usage of electronic resources be made compulsory, intensifying awareness campaigns concerning the availability, training on use of electronic resources and the problem of power outage be addressed.

  18. Purification, characterization and immunoregulatory activity of a polysaccharide isolated from Hibiscus sabdariffa L.

    Science.gov (United States)

    Zheng, Daheng; Zou, Ye; Cobbina, Samuel Jerry; Wang, Wei; Li, Qian; Chen, Yao; Feng, Weiwei; Zou, Yanmin; Zhao, Ting; Zhang, Min; Yang, Liuqing; Wu, Xiangyang

    2017-03-01

    Hibiscus sabdariffa L. is not only used traditionally as a component of herbal drinks, beverages and flavoring agents but also as a herbal medicine in the drug industry. Bioactive polysaccharides are important constituents of H. sabdariffa that may contribute to the plant's beneficial effects. This study was designed to investigate the structural characteristics of a water-soluble polysaccharide from H. sabdariffa, HSP41, and its immunoregulatory activity on RAW264.7 cells. HSP41 was mainly composed of arabinose, xylose and mannose at a molar ratio of 1:1.34:15.6, with an average molecular weight of 3.3 × 10 5  Da. Fourier transform infrared (FTIR) spectra exhibited absorption peaks characteristic of HSP41. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) revealed the amorphous form and aggregation conformation of HSP41 respectively. HSP41 significantly induced interleukin 1β (IL-1β) and inducible nitric oxide synthase (iNOS) expression in RAW264.7 cells in vitro, promoting an increase in nuclear factor kB p65 (NF-kB p65) levels in the nucleus. The results indicated that HSP41 up-regulated the immune response by stimulating RAW264.7 cell activity. HSP41, a promising immunoregulator, possibly contributes to the health benefits of H. sabdariffa and might have potential applications in health food or medicine. © 2016 Society of Chemical Industry. © 2016 Society of Chemical Industry.

  19. A Study on Developing Evaluation Criteria for Electronic Resources in Evaluation Indicators of Libraries

    Science.gov (United States)

    Noh, Younghee

    2010-01-01

    This study aimed to improve the current state of electronic resource evaluation in libraries. While the use of Web DB, e-book, e-journal, and other e-resources such as CD-ROM, DVD, and micro materials is increasing in libraries, their use is not comprehensively factored into the general evaluation of libraries and may diminish the reliability of…

  20. Complete nucleotide sequence and genome structure of a Japanese isolate of hibiscus latent Fort Pierce virus, a unique tobamovirus that contains an internal poly(A) region in its 3' end.

    Science.gov (United States)

    Yoshida, Tetsuya; Kitazawa, Yugo; Komatsu, Ken; Neriya, Yutaro; Ishikawa, Kazuya; Fujita, Naoko; Hashimoto, Masayoshi; Maejima, Kensaku; Yamaji, Yasuyuki; Namba, Shigetou

    2014-11-01

    In this study, we detected a Japanese isolate of hibiscus latent Fort Pierce virus (HLFPV-J), a member of the genus Tobamovirus, in a hibiscus plant in Japan and determined the complete sequence and organization of its genome. HLFPV-J has four open reading frames (ORFs), each of which shares more than 98 % nucleotide sequence identity with those of other HLFPV isolates. Moreover, HLFPV-J contains a unique internal poly(A) region of variable length, ranging from 44 to 78 nucleotides, in its 3'-untranslated region (UTR), as is the case with hibiscus latent Singapore virus (HLSV), another hibiscus-infecting tobamovirus. The length of the HLFPV-J genome was 6431 nucleotides, including the shortest internal poly(A) region. The sequence identities of ORFs 1, 2, 3 and 4 of HLFPV-J to other tobamoviruses were 46.6-68.7, 49.9-70.8, 31.0-70.8 and 39.4-70.1 %, respectively, at the nucleotide level and 39.8-75.0, 43.6-77.8, 19.2-70.4 and 31.2-74.2 %, respectively, at the amino acid level. The 5'- and 3'-UTRs of HLFPV-J showed 24.3-58.6 and 13.0-79.8 % identity, respectively, to other tobamoviruses. In particular, when compared to other tobamoviruses, each ORF and UTR of HLFPV-J showed the highest sequence identity to those of HLSV. Phylogenetic analysis showed that HLFPV-J, other HLFPV isolates and HLSV constitute a malvaceous-plant-infecting tobamovirus cluster. These results indicate that the genomic structure of HLFPV-J has unique features similar to those of HLSV. To our knowledge, this is the first report of the complete genome sequence of HLFPV.

  1. Characterization of the Kenaf (Hibiscus cannabinus) Global Transcriptome Using Illumina Paired-End Sequencing and Development of EST-SSR Markers

    Science.gov (United States)

    Li, Hui; Li, Defang; Chen, Anguo; Tang, Huijuan; Li, Jianjun; Huang, Siqi

    2016-01-01

    Kenaf (Hibiscus cannabinus L.) is an economically important natural fiber crop grown worldwide. However, only 20 expressed tag sequences (ESTs) for kenaf are available in public databases. The aim of this study was to develop large-scale simple sequence repeat (SSR) markers to lay a solid foundation for the construction of genetic linkage maps and marker-assisted breeding in kenaf. We used Illumina paired-end sequencing technology to generate new EST-simple sequences and MISA software to mine SSR markers. We identified 71,318 unigenes with an average length of 1143 nt and annotated these unigenes using four different protein databases. Overall, 9324 complementary pairs were designated as EST-SSR markers, and their quality was validated using 100 randomly selected SSR markers. In total, 72 primer pairs reproducibly amplified target amplicons, and 61 of these primer pairs detected significant polymorphism among 28 kenaf accessions. Thus, in this study, we have developed large-scale SSR markers for kenaf, and this new resource will facilitate construction of genetic linkage maps, investigation of fiber growth and development in kenaf, and also be of value to novel gene discovery and functional genomic studies. PMID:26960153

  2. Characterization of the Kenaf (Hibiscus cannabinus) Global Transcriptome Using Illumina Paired-End Sequencing and Development of EST-SSR Markers.

    Science.gov (United States)

    Li, Hui; Li, Defang; Chen, Anguo; Tang, Huijuan; Li, Jianjun; Huang, Siqi

    2016-01-01

    Kenaf (Hibiscus cannabinus L.) is an economically important natural fiber crop grown worldwide. However, only 20 expressed tag sequences (ESTs) for kenaf are available in public databases. The aim of this study was to develop large-scale simple sequence repeat (SSR) markers to lay a solid foundation for the construction of genetic linkage maps and marker-assisted breeding in kenaf. We used Illumina paired-end sequencing technology to generate new EST-simple sequences and MISA software to mine SSR markers. We identified 71,318 unigenes with an average length of 1143 nt and annotated these unigenes using four different protein databases. Overall, 9324 complementary pairs were designated as EST-SSR markers, and their quality was validated using 100 randomly selected SSR markers. In total, 72 primer pairs reproducibly amplified target amplicons, and 61 of these primer pairs detected significant polymorphism among 28 kenaf accessions. Thus, in this study, we have developed large-scale SSR markers for kenaf, and this new resource will facilitate construction of genetic linkage maps, investigation of fiber growth and development in kenaf, and also be of value to novel gene discovery and functional genomic studies.

  3. THE MODEL OF LINGUISTIC TEACHERS’ COMPETENCY DEVELOPMENT ON DESIGNING MULTIMEDIA ELECTRONIC EDUCATIONAL RESOURCES IN THE MOODLE SYSTEM

    OpenAIRE

    Anton M. Avramchuk

    2017-01-01

    The article is devoted to the problem of developing the competency of teachers of language disciplines on designing multimedia electronic educational resources in the Moodle system. The concept of "the competence of teachers of language disciplines on designing multimedia electronic educational resources in the Moodle system" is justified and defined. Identified and characterized the components by which the levels of the competency development of teachers of language disciplines on designing ...

  4. Apple, carrot, and hibiscus edible films containing the plant antimicrobials carvacrol and cinnamaldehyde inactivate Salmonella Newport on organic leafy greens in sealed plastic bags

    Science.gov (United States)

    The objective of this study was to investigate the antimicrobial effects of carvacrol and cinnamaldehyde incorporated into apple, carrot and hibiscus based edible films against Salmonella Newport in contaminated organic leafy greens. The leafy greens tested included romaine and iceberg lettuce, and ...

  5. Determining the level of awareness of the physicians in using the variety of electronic information resources and the effecting factors.

    Science.gov (United States)

    Papi, Ahmad; Ghazavi, Roghayeh; Moradi, Salimeh

    2015-01-01

    Understanding of the medical society's from the types of information resources for quick and easy access to information is an imperative task in medical researches and management of the treatment. The present study was aimed to determine the level of awareness of the physicians in using various electronic information resources and the factors affecting it. This study was a descriptive survey. The data collection tool was a researcher-made questionnaire. The study population included all the physicians and specialty physicians of the teaching hospitals affiliated to Isfahan University of Medical Sciences and numbered 350. The sample size based on Morgan's formula was set at 180. The content validity of the tool was confirmed by the library and information professionals and the reliability was 95%. Descriptive statistics were used including the SPSS software version 19. On reviewing the need of the physicians to obtain the information on several occasions, the need for information in conducting the researches was reported by the maximum number of physicians (91.9%) and the usage of information resources, especially the electronic resources, formed 65.4% as the highest rate with regard to meeting the information needs of the physicians. Among the electronic information databases, the maximum awareness was related to Medline with 86.5%. Among the various electronic information resources, the highest awareness (43.3%) was related to the E-journals. The highest usage (36%) was also from the same source. The studied physicians considered the most effective deterrent in the use of electronic information resources as being too busy and lack of time. Despite the importance of electronic information resources for the physician's community, there was no comprehensive knowledge of these resources. This can lead to less usage of these resources. Therefore, careful planning is necessary in the hospital libraries in order to introduce the facilities and full capabilities of the

  6. Managing Selection for Electronic Resources: Kent State University Develops a New System to Automate Selection

    Science.gov (United States)

    Downey, Kay

    2012-01-01

    Kent State University has developed a centralized system that manages the communication and work related to the review and selection of commercially available electronic resources. It is an automated system that tracks the review process, provides selectors with price and trial information, and compiles reviewers' feedback about the resource. It…

  7. Anatomia, ultra-estrutura e secreção do nectário extrafloral de Hibiscus pernambucensis Arruda (Malvaceae)

    OpenAIRE

    Rocha, Joecildo Francisco; Machado, Silvia Rodrigues [UNESP

    2009-01-01

    This paper reports on the extrafloral nectary (EFN) of Hibiscus pernambucensis, a native shrub species occurring in mangrove and restinga along Brazil's coastline. EFNs occur as furrows with a protuberant border on the abaxial surface veins of the leaf blade. Each nectary consists of numerous secretory multicellular trichomes, epidermal cells in palisade-like arrangements and non-vascularized parenchyma tissue. Nectar secretion is prolonged, since secretion starts in very young leaves and rem...

  8. Consumption of Hibiscus sabdariffa L. aqueous extract and its impact on systemic antioxidant potential in healthy subjects.

    Science.gov (United States)

    Frank, Thomas; Netzel, Gabriele; Kammerer, Dietmar R; Carle, Reinhold; Kler, Adolf; Kriesl, Erwin; Bitsch, Irmgard; Bitsch, Roland; Netzel, Michael

    2012-08-15

    To evaluate health benefits attributed to Hibiscus sabdariffa L. a randomized, open-label, two-way crossover study was undertaken to compare the impact of an aqueous H. sabdariffa L. extract (HSE) on the systemic antioxidant potential (AOP; assayed by ferric reducing antioxidant power (FRAP)) with a reference treatment (water) in eight healthy volunteers. The biokinetic variables were the areas under the curve (AUC) of plasma FRAP, ascorbic acid and urate that are above the pre-dose concentration, and the amounts excreted into urine within 24 h (Ae(0-24) ) of antioxidants as assayed by FRAP, ascorbic acid, uric acid, malondialdehyde (biomarker for oxidative stress), and hippuric acid (metabolite and potential biomarker for total polyphenol intake). HSE caused significantly higher plasma AUC of FRAP, an increase in Ae(0-24) of FRAP, ascorbic acid and hippuric acid, whereas malondialdehyde excretion was reduced. Furthermore, the main hibiscus anthocyanins as well as one glucuronide conjugate could be quantified in the volunteers' urine (0.02% of the administered dose). The aqueous HSE investigated in this study enhanced the systemic AOP and reduced the oxidative stress in humans. Furthermore, the increased urinary hippuric acid excretion after HSE consumption indicates a high biotransformation of the ingested HSE polyphenols, most likely caused by the colonic microbiota. Copyright © 2012 Society of Chemical Industry.

  9. End-of-life resource recovery from emerging electronic products

    DEFF Research Database (Denmark)

    Parajuly, Keshav; Habib, Komal; Cimpan, Ciprian

    2016-01-01

    Integrating product design with appropriate end-of-life (EoL) processing is widely recognized to have huge potentials in improving resource recovery from electronic products. In this study, we investigate both the product characteristics and EoL processing of robotic vacuum cleaner (RVC), as a case...... of emerging electronic product, in order to understand the recovery fate of different materials and its linkage to product design. Ten different brands of RVC were dismantled and their material composition and design profiles were studied. Another 125 RVCs (349 kg) were used for an experimental trial...... at a conventional ‘shred-and-separate’ type preprocessing plant in Denmark. A detailed material flow analysis was performed throughout the recycling chain. The results show a mismatch between product design and EoL processing, and the lack of practical implementation of ‘Design for EoL’ thinking. In the best...

  10. Nonlinear refractive index measurements and self-action effects in Roselle-Hibiscus Sabdariffa solutions

    Science.gov (United States)

    Henari, F. Z.; Al-Saie, A.

    2006-12-01

    We report the observation of self-action phenomena, such as self-focusing, self-defocusing, self-phase modulation and beam fanning in Roselle-Hibiscus Sabdariffa solutions. This material is found to be a new type of natural nonlinear media, and the nonlinear reflective index coefficient has been determined using a Z-scan technique and by measuring the critical power for the self-trapping effect. Z-scan measurements show that this material has a large negative nonlinear refractive index, n 2 = 1 × 10-4 esu. A comparison between the experimental n 2 values and the calculated thermal value for n 2 suggests that the major contribution to nonlinear response is of thermal origin.

  11. Biology of Maconellicoccus hirsutus (Hemiptera: Pseudococcidae on Hibiscus rosa-sinensis = Biologia de Maconellicoccus hirsutus (Hemiptera: Pseudococcidae em Hibiscus rosa-sinensis

    Directory of Open Access Journals (Sweden)

    Marcelo Negrini

    2017-10-01

    Full Text Available Maconellicoccus hirsutus Green, 1908 (Hemiptera: Pseudococcidae is an introduced pest that threatens fruit and ornamental plant production in Brazil. Reported in Brazil for the first time in 2010, in the state of Roraima, M. hirsutus, has spread rapidly to other regions of the country. The objective of this study was to investigate the biology of M. hirsutus on Hibiscus rosa-sinensis L. (Malvaceae leaves in laboratory conditions with climatic parameters similar to those of the Brazilian North and Northeast (27 ± 1 °C, 60 ± 10% relative humidity and 12 hours light and 12 hours dark. Eighty M. hirsutus nymphs were individualized on rooted H. rosa-sinensis leaves and their survival, mortality, sex ratio, and egg numbers per female emerged were recorded. Maconellicoccus hirsutus can have up to nine generations per year, taking 6.5 days to double its population size. The female numbers of this pest are about three times higher than those for its male counterparts, with 98 eggs per female and 97% viability. The survival curve of the species is type I, that is, mortality rates are higher in adulthood. Maconellicoccus hirsutus, especially, a pest of fruit trees and ornamental plants, presents great potential for population growth in Brazilian tropical conditions. = Maconellicoccus hirsutus Green, 1908 (Hemiptera: Pseudococcidae é uma praga introduzida que ameaça a produção de frutas e plantas ornamentais no Brasil. Registrada no Brasil pela primeira vez em 2010, no estado de Roraima, M. hirsutus se espalhou rapidamente para outras regiões do país. O objetivo deste estudo foi investigar a biologia de M. hirsutus em folhas de Hibiscus rosa-sinensis L. (Malvaceae, em condições de laboratório com parâmetros climáticos semelhantes aos das regiões Norte e Nordeste do Brasil (27 ± 1 °C, 60 ± 10 % de umidade relativa e 12 h de luz e 12 h de escuro. Oitenta ninfas de M. hirsutus foram individualizadas em folhas enraizadas de H. rosa-sinensis e

  12. Use of electronic sales data to tailor nutrition education resources for an ethnically diverse population.

    Science.gov (United States)

    Eyles, H; Rodgers, A; Ni Mhurchu, C

    2010-02-01

    Nutrition education may be most effective when personally tailored. Individualised electronic supermarket sales data offer opportunities to tailor nutrition education using shopper's usual food purchases. The present study aimed to use individualised electronic supermarket sales data to tailor nutrition resources for an ethnically diverse population in a large supermarket intervention trial in New Zealand. Culturally appropriate nutrition education resources (i.e. messages and shopping lists) were developed with the target population (through two sets of focus groups) and ethnic researchers. A nutrient database of supermarket products was developed using retrospective sales data and linked to participant sales to allow tailoring by usual food purchases. Modified Heart Foundation Tick criteria were used to identify 'healthier' products in the database suitable for promotion in the resources. Rules were developed to create a monthly report listing the tailored and culturally targeted messages to be sent to each participant, and to produce automated, tailored shopping lists. Culturally targeted nutrition messages (n = 864) and shopping lists (n = 3 formats) were developed. The food and nutrient database (n = 3000 top-selling products) was created using 12 months of retrospective sales data, and comprised 60%'healthier' products. Three months of baseline sales data were used to determine usual food purchases. Tailored resources were successfully mailed to 123 Māori, 52 Pacific and 346 non-Māori non-Pacific participants over the 6-month trial intervention period. Electronic supermarket sales data can be used to tailor nutrition education resources for a large number of ethnically diverse supermarket shoppers.

  13. Biodiversity of aerobic endospore-forming bacterial species occurring in Yanyanku and Ikpiru, fermented seeds of Hibiscus sabdariffa used to produce food condiments in Benin

    DEFF Research Database (Denmark)

    Agbobatinkpo, Pélagie B.; Thorsen, Line; Nielsen, Dennis Sandris

    2013-01-01

    Yanyanku and Ikpiru made by the fermentation of Malcavene bean (Hibiscus sabdariffa) are used as functional additives for Parkia biglobosa seed fermentations in Benin. A total of 355 aerobic endospore-forming bacteria (AEFB) isolated from Yanyanku and Ikpiru produced in northern and southern Benin...

  14. Bioavailability study of a polyphenol-enriched extract from Hibiscus sabdariffa in rats and associated antioxidant status.

    Science.gov (United States)

    Fernández-Arroyo, Salvador; Herranz-López, María; Beltrán-Debón, Raúl; Borrás-Linares, Isabel; Barrajón-Catalán, Enrique; Joven, Jorge; Fernández-Gutiérrez, Alberto; Segura-Carretero, Antonio; Micol, Vicente

    2012-10-01

    The aqueous extracts of Hibiscus sabdariffa have been commonly used in folk medicine. Nevertheless, the compounds or metabolites responsible for its healthy effects have not yet been identified. The major metabolites present in rat plasma after acute ingestion of a polyphenol-enriched Hibiscus sabdariffa extract were characterized and quantified in order to study their bioavailability. The antioxidant status of the plasma samples was also measured through several complementary antioxidant techniques. High-performance liquid chromatography coupled to time-of-flight mass spectrometry (HPLC-ESI-TOF-MS) was used for the bioavailability study. The antioxidant status was measured by ferric reducing ability of plasma method, thiobarbituric acid reactive substances assay, and superoxide dismutase activity assay. Seventeen polyphenols and metabolites have been detected and quantified. Eleven of these compounds were metabolites. Although phenolic acids were found in plasma without any modification in their structures, most flavonols were found as quercetin or kaempferol glucuronide conjugates. Flavonol glucuronide conjugates, which show longer half-life elimination values, are proposed to contribute to the observed lipid peroxidation inhibitory activity in the cellular membranes. By contrast, phenolic acids appear to exert their antioxidant activity through ferric ion reduction and superoxide scavenging at shorter times. We propose that flavonol-conjugated forms (quercetin and kaempferol) may be the compounds responsible for the observed antioxidant effects and contribute to the healthy effects of H. sabdariffa polyphenolic extract. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  15. Plant growth retardation and conserved miRNAs are correlated to Hibiscus chlorotic ringspot virus infection.

    Science.gov (United States)

    Gao, Ruimin; Wan, Zi Yi; Wong, Sek-Man

    2013-01-01

    Virus infection may cause a multiplicity of symptoms in their host including discoloration, distortion and growth retardation. Hibiscus chlorotic ringspot virus (HCRSV) infection was studied using kenaf (Hibiscus cannabinus L.), a non-wood fiber-producing crop in this study. Infection by HCRSV reduced the fiber yield and concomitant economic value of kenaf. We investigated kenaf growth retardation and fluctuations of four selected miRNAs after HCRSV infection. Vegetative growth (including plant height, leaf size and root development) was severely retarded. From the transverse and radial sections of the mock and HCRSV-infected kenaf stem, the vascular bundles of HCRSV-infected plants were severely disrupted. In addition, four conserved plant developmental and defence related microRNAs (miRNAs) (miR165, miR167, miR168 and miR171) and their respective target genes phabulosa (PHB), auxin response factor 8 (ARF8), argonaute 1 (AGO1) and scarecrow-like protein 1 (SCL1) displayed variation in expression levels after HCRSV infection. Compared with the mock inoculated kenaf plants, miR171 and miR168 and their targets SCL1 and AGO1 showed greater fluctuations after HCRSV infection. As HCRSV upregulates plant SO transcript in kenaf and upregulated AGO1 in HCRSV-infected plants, the expression level of AGO1 transcript was further investigated under sulfite oxidase (SO) overexpression or silencing condition. Interestingly, the four selected miRNAs were also up- or down-regulated upon overexpression or silencing of SO. Plant growth retardation and fluctuation of four conserved miRNAs are correlated to HCRSV infection.

  16. Availability, Level of Use and Constraints to Use of Electronic Resources by Law Lecturers in Public Universities in Nigeria

    Science.gov (United States)

    Amusa, Oyintola Isiaka; Atinmo, Morayo

    2016-01-01

    (Purpose) This study surveyed the level of availability, use and constraints to use of electronic resources among law lecturers in Nigeria. (Methodology) Five hundred and fifty-two law lecturers were surveyed and four hundred and forty-two responded. (Results) Data analysis revealed that the level of availability of electronic resources for the…

  17. Usage of immobilized porcine pancreas lipase in the hydrolysis of roselle (Hibiscus sabdariffa L.) seed oil

    Science.gov (United States)

    Ai, Chau Tran Diem; Linh, Vo Thi Hong; Yen, Tran Thi Ngoc; Nguyen, Nguyen Thi; Hoa, Phan Ngoc

    2017-09-01

    This study focused on the comparison among the usage of immobilized porcine pancreas lipase (PPL) on different hydrotalcite carriers (uncalcined and calcined hydrotalcite - like compound Mg /Al) and free lipase as the catalysts to hydrolyze of roselle (Hibiscus sabdariffa L.) seed oil. The reaction conditions were investigated including the ratio of oil to buffer, ratio of enzyme to substrate, the temperature of the hydrolysis, pH. The calcined hydrotalcite showed a higher lipase immobilization yield and a better reusability than the uncalcined hydrotalcite (87.15% and 86.78%, respectively).

  18. A systematic review of portable electronic technology for health education in resource-limited settings.

    Science.gov (United States)

    McHenry, Megan S; Fischer, Lydia J; Chun, Yeona; Vreeman, Rachel C

    2017-08-01

    The objective of this study is to conduct a systematic review of the literature of how portable electronic technologies with offline functionality are perceived and used to provide health education in resource-limited settings. Three reviewers evaluated articles and performed a bibliography search to identify studies describing health education delivered by portable electronic device with offline functionality in low- or middle-income countries. Data extracted included: study population; study design and type of analysis; type of technology used; method of use; setting of technology use; impact on caregivers, patients, or overall health outcomes; and reported limitations. Searches yielded 5514 unique titles. Out of 75 critically reviewed full-text articles, 10 met inclusion criteria. Study locations included Botswana, Peru, Kenya, Thailand, Nigeria, India, Ghana, and Tanzania. Topics addressed included: development of healthcare worker training modules, clinical decision support tools, patient education tools, perceptions and usability of portable electronic technology, and comparisons of technologies and/or mobile applications. Studies primarily looked at the assessment of developed educational modules on trainee health knowledge, perceptions and usability of technology, and comparisons of technologies. Overall, studies reported positive results for portable electronic device-based health education, frequently reporting increased provider/patient knowledge, improved patient outcomes in both quality of care and management, increased provider comfort level with technology, and an environment characterized by increased levels of technology-based, informal learning situations. Negative assessments included high investment costs, lack of technical support, and fear of device theft. While the research is limited, portable electronic educational resources present promising avenues to increase access to effective health education in resource-limited settings, contingent

  19. Comparative chemical and biochemical analysis of extracts of Hibiscus sabdariffa.

    Science.gov (United States)

    Sindi, Heba A; Marshall, Lisa J; Morgan, Michael R A

    2014-12-01

    Hibiscus sabdariffa extracts have attracted attention because of potentially useful bioactivity. However, there have been no systematic studies of extraction efficiencies of H. sabdariffa. The nature of extracts used in different studies has varied considerably, making comparisons difficult. Therefore, a systematic study of extracts of H. sabdariffa made with different solvents was carried out using water, methanol, ethyl acetate and hexane in the presence/absence of formic acid, using different extraction times and temperatures. The extracts were analysed for total polyphenol content, antioxidant capacity using DPPH, FRAP and TEAC assays, and specific anthocyanins were determined using HPLC and LC-MS. The results showed the highest antioxidant capacities were obtained by extracting using water, with or without formic acid, for 10 min at 100°C. These extracts provided the highest concentrations of cyanidin 3-sambubioside and delphinidin 3-sambubioside. It will be important to use extraction conditions giving optimal extraction efficiencies for subsequent bioactivity experiments. Copyright © 2014 Elsevier Ltd. All rights reserved.

  20. Wound Healing Potential of Formulated Extract from Hibiscus Sabdariffa Calyx

    Science.gov (United States)

    Builders, P. F.; Kabele-Toge, B.; Builders, M.; Chindo, B. A.; Anwunobi, Patricia A.; Isimi, Yetunde C.

    2013-01-01

    Wound healing agents support the natural healing process, reduce trauma and likelihood of secondary infections and hasten wound closure. The wound healing activities of water in oil cream of the methanol extract of Hibiscus sabdariffa L. (Malvaceae) was evaluated in rats with superficial skin excision wounds. Antibacterial activities against Pseudomonas aeroginosa, Staphylococcus aureus and Echerichia coli were determined. The total flavonoid content, antioxidant properties and thin layer chromatographic fingerprints of the extract were also evaluated. The extract demonstrated antioxidant properties with a total flavonoid content of 12.30±0.09 mg/g. Six reproducible spots were obtained using methanol:water (95:5) as the mobile phase. The extract showed no antimicrobial activity on the selected microorganisms, which are known to infect and retard wound healing. Creams containing H. sabdariffa extract showed significant (Psabdariffa extract. This study, thus, provides evidence of the wound healing potentials of the formulated extract of the calyces of H. sabdariffa and synergism when co-formulated with gentamicin. PMID:23901160

  1. An evaluation of the hypolipidemic effect of an extract of Hibiscus Sabdariffa leaves in hyperlipidemic Indians: a double blind, placebo controlled trial

    Science.gov (United States)

    2010-01-01

    Background Hibiscus sabdariffa is used regularly in folk medicine to treat various conditions. Methods The study was a double blind, placebo controlled, randomized trial. Sixty subjects with serum LDL values in the range of 130-190 mg/dl and with no history of coronary heart disease were randomized into experimental and placebo groups. The experimental group received 1 gm of the extract for 90 days while the placebo received a similar amount of maltodextrin in addition to dietary and physical activity advice for the control of their blood lipids. Anthropometry, blood biochemistry, dietary and physical activity were assessed at baseline, day 45 and day 90. Results While body weight, serum LDL cholesterol and triglyceride levels decreased in both groups, there were no significant differences between the experimental and placebo group. Conclusions It is likely that the observed effects were as a result of the patients following the standard dietary and physical activity advice. At a dose of 1 gm/day, hibiscus sabdariffa leaf extract did not appear to have a blood lipid lowering effect. Trial Registration REFCTRI2009000472 PMID:20553629

  2. An evaluation of the hypolipidemic effect of an extract of Hibiscus Sabdariffa leaves in hyperlipidemic Indians: a double blind, placebo controlled trial

    Directory of Open Access Journals (Sweden)

    R Rajendran

    2010-06-01

    Full Text Available Abstract Background Hibiscus sabdariffa is used regularly in folk medicine to treat various conditions. Methods The study was a double blind, placebo controlled, randomized trial. Sixty subjects with serum LDL values in the range of 130-190 mg/dl and with no history of coronary heart disease were randomized into experimental and placebo groups. The experimental group received 1 gm of the extract for 90 days while the placebo received a similar amount of maltodextrin in addition to dietary and physical activity advice for the control of their blood lipids. Anthropometry, blood biochemistry, dietary and physical activity were assessed at baseline, day 45 and day 90. Results While body weight, serum LDL cholesterol and triglyceride levels decreased in both groups, there were no significant differences between the experimental and placebo group. Conclusions It is likely that the observed effects were as a result of the patients following the standard dietary and physical activity advice. At a dose of 1 gm/day, hibiscus sabdariffa leaf extract did not appear to have a blood lipid lowering effect. Trial Registration REFCTRI2009000472

  3. ROSELLE FLOWER (HIBISCUS SABDARIFFA IN THE TREATMENT OF HYPERTENSION IN POSTPARTUM MOTHERS

    Directory of Open Access Journals (Sweden)

    Nikmah Jalilah Ritonga

    2017-07-01

    Full Text Available Background: Roselle flower (Hibiscus sabdariffa has been used as a food and herbal drinks, in hot and cold beverages, as a herbal medicine. Objective: To examine the effect of consuming roselle dried flower petals on changes in maternal hypertensive blood pressure during postpartum period. Methods: This was a quasi-experimental study with non-equivalent control group design conducted in 2016. There were 30 samples recruited using consecutive sampling with 15 samples in the intervention group and control group. Data were analyzed using paired t-test to know the difference of blood pressure value before and after intervention in the intervention and control group, and Independent t-test to determine the difference of blood pressure decrease between intervention and control group. Mann-whitney and Wilcoxon test were also performed for data analysis. Results: Findings showed that there were statistically significant differences in systolic and diastolic blood pressure values before and after intervention in the intervention and control group with p-value 0.000 <0.05 with systolic blood pressure decrease was 5 mmHg and diastolic was 5.33 mmHg. Additionally, there was a significant effect in the duration of healing in the intervention group with p-value 0.000 <0.05, with the average duration of healing was 2 days. Conclusion: There was significant effects of dried petals of rosella flowers (Hibiscus sabdariffa brewed with 200 ml of hot water with temperature 90oC in lowering blood pressure, and there was significant differences in systolic and diastolic blood pressure and duration of healing between the intervention and control group of mothers who consumed antihypertensive drugs. The results of this study can be applied by midwives in postpartum care with the cases of hypertension. It is expected that this intervention can help the healing process more quickly through a combination of antihypertensive medicines and sedated petals of rosella flowers.

  4. ROSELLE FLOWER (HIBISCUS SABDARIFFA IN THE TREATMENT OF HYPERTENSION IN POSTPARTUM MOTHERS

    Directory of Open Access Journals (Sweden)

    Nikmah Jalilah Ritonga

    2017-07-01

    Full Text Available Background: Roselle flower (Hibiscus sabdariffa has been used as a food and herbal drinks, in hot and cold beverages, as a herbal medicine. Objective: To examine the effect of consuming roselle dried flower petals on changes in maternal hypertensive blood pressure during postpartum period. Methods: This was a Quasi experimental study with non-equivalent control group design conducted in 2016. There were 30 samples recruited by consecutive sampling with 15 samples in the intervention and control group. Data were analyzed using paired t-test to know the difference of blood pressure value before and after intervention in the intervention and control group, and Independent t-test to determine the difference of blood pressure decrease between intervention and control group. Mann-whitney and Wilcoxon test were also performed for non-normal data distribution. Results: Findings showed that there were statistically significant differences in systolic and diastolic blood pressure values before and after intervention in the intervention group with p-value 0.000 <0.05 with mean of systolic blood pressure decrease was 39.67 mmHg and diastolic was 22.33 mmHg. Additionally, there was a significant difference in the duration of healing between both groups with p-value 0.000 <0.05, with the average duration of healing in the intervention group was 2 days while in the control group was 3-4 days. Conclusion: There was significant effects of dried petals of rosella flowers (Hibiscus sabdariffa in lowering blood pressure, and there was significant differences in systolic and diastolic blood pressure and duration of healing between the intervention and control group of mothers who consumed antihypertensive drugs. The results of this study can be applied by midwives or health services in postpartum care with the cases of hypertension. It is expected that this intervention can help the healing process more quickly through a combination of antihypertensive medicines and

  5. SAGES: a suite of freely-available software tools for electronic disease surveillance in resource-limited settings.

    Directory of Open Access Journals (Sweden)

    Sheri L Lewis

    Full Text Available Public health surveillance is undergoing a revolution driven by advances in the field of information technology. Many countries have experienced vast improvements in the collection, ingestion, analysis, visualization, and dissemination of public health data. Resource-limited countries have lagged behind due to challenges in information technology infrastructure, public health resources, and the costs of proprietary software. The Suite for Automated Global Electronic bioSurveillance (SAGES is a collection of modular, flexible, freely-available software tools for electronic disease surveillance in resource-limited settings. One or more SAGES tools may be used in concert with existing surveillance applications or the SAGES tools may be used en masse for an end-to-end biosurveillance capability. This flexibility allows for the development of an inexpensive, customized, and sustainable disease surveillance system. The ability to rapidly assess anomalous disease activity may lead to more efficient use of limited resources and better compliance with World Health Organization International Health Regulations.

  6. Use and Cost of Electronic Resources in Central Library of Ferdowsi University Based on E-metrics

    Directory of Open Access Journals (Sweden)

    Mohammad Reza Davarpanah

    2012-07-01

    Full Text Available The purpose of this study was to investigate the usage of electronic journals in Ferdowsi University, Iran based on e-metrics. The paper also aimed to emphasize the analysis of cost-benefit and the correlation between the journal impact factors and the usage data. In this study experiences of Ferdowsi University library on licensing and usage of electronic resources was evaluated by providing a cost-benefit analysis based on the cost and usage statistics of electronic resources. Vendor-provided data were also compared with local usage data. The usage data were collected by tracking web-based access locally, and by collecting vender-provided usage data. The data sources were one-year of vendor-supplied e-resource usage data such as Ebsco, Elsevier, Proquest, Emerald, Oxford and Springer and local usage data collected from the Ferdowsi university web server. The study found that actual usage values differ for vendor-provided data and local usage data. Elsevier has got the highest usage degree in searches, sessions and downloads. Statistics also showed that a small number of journals satisfy significant amount of use while the majority of journals were used less frequent and some were never used at all. The users preferred the PDF rather than HTML format. The data in subject profile suggested that the provided e-resources were best suited to certain subjects. There was no correlation between IF and electronic journal use. Monitoring the usage of e-resources gained increasing importance for acquisition policy and budget decisions. The article provided information about local metrics for the six surveyed vendors/publishers, e.g. usage trends, requests per package, cost per use as related to the scientific specialty of the university.

  7. Antihypoxic and antioxidant activity of Hibiscus esculentus seeds

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    Eslami, Bahman

    2010-03-01

    Full Text Available The antihypoxic and antioxidant activities of Hibiscus esculentus seeds were investigated employing eight in vitro assay systems. Antihypoxic activity was investigated in two models, haemic and circulatory. The effects were pronounced in both models of hypoxia. The antihypoxic effects were dose-dependent. The results indicated that the extracts have a protective effect against hypoxia induced lethality in mice. The extracts showed antioxidant activity in some models. IC50 for DPPH radical-scavenging activity was 234 ± 8.9 μg ml-1. The extracts showed weak nitric oxide-scavenging activity between 0.1 and 1.6 mg ml-1. The extracts showed weak Fe2+ chelating ability. IC50 were 150 ± 13 μg ml-1. The extracts also exhibited low antioxidant activity in the linoleic acid model but were capable of scavenging hydrogen peroxide in a concentration dependent manner. The total amount of phenolic compounds in each extract was determined as gallic acid equivalents and total flavonoid contents were calculated as quercetin equivalents from a calibration curve. Pharmacological effects may be attributed, at least in part, to the presence of phenols and flavonoids in the extracts.La actividad antihipóxica y antioxidante de semillas de Hibiscus esculentus fue investigada empleando ocho ensayos in vitro. La actividad antihipóxica fue investigada en dos modelos, uno de caracter hemínico y otro circulatorio. Los efectos fueron pronunciados en ambos modelos de hipoxia. Los efectos antihipóxicos fueron dependientes de la dosis. Los resultados indican que los extractos tienen un efecto protector contra la letabilidad inducida por hipoxia en ratones. Los extractos mostraron actividad antioxidante en algunos modelos. El IC50 para la actividad captadora de radicales fue 234 ± 8.9 μg ml-1. Los extractos muestran una débil actividad captadora de óxido nítrico comprendida entre 0.1 y 1.6 mg ml-1. Los extractos muestran una débil capacidad quelatante de Fe2+. El IC

  8. The ant assemblage visiting extrafloral nectaries of Hibiscus pernambucensis (Malvaceae) in a mangrove forest in Southeast Brazil (Hymenoptera : Formicidae)

    OpenAIRE

    Cogni, R; Freitas, AVL

    2002-01-01

    Ant species visiting extrafloral nectaries (EFNs) of Hibiscus pernambucensis were studied in a daily flooded mangrove forest in Picinguaba, Southeast Brazil. Nineteen ant species in five subfamilies were observed visiting the EFNs. The most common species (in order of abundance) were Camponotus sp.2, Brachymyrmex sp. and Pseudomyrmex gracilis during the warm season and Brachymyrmex sp., Camponotus crassus and Camponotus sp.2 during the cold season. A twenty-four hour census showed that ant ac...

  9. Building and Managing Electronic Resources in Digital Era in India with Special Reference to IUCAA and NIV, Pune: A Comparative Case Study

    Science.gov (United States)

    Sahu, H. K.; Singh, S. N.

    2015-04-01

    This paper discusses and presents a comparative case study of two libraries in Pune, India, Inter-University Centre for Astronomy and Astrophysics and Information Centre and Library of National Institute of Virology (Indian Council of Medical Research). It compares how both libraries have managed their e-resource collections, including acquisitions, subscriptions, and consortia arrangements, while also developing a collection of their own resources, including pre-prints and publications, video lectures, and other materials in an institutional repository. This study illustrates how difficult it is to manage electronic resources in a developing country like India, even though electronic resources are used more than print resources. Electronic resource management can be daunting, but with a systematic approach, various problems can be solved, and use of the materials will be enhanced.

  10. Hibiscus latent Fort Pierce virus in Brazil and synthesis of its biologically active full-length cDNA clone.

    Science.gov (United States)

    Gao, Ruimin; Niu, Shengniao; Dai, Weifang; Kitajima, Elliot; Wong, Sek-Man

    2016-10-01

    A Brazilian isolate of Hibiscus latent Fort Pierce virus (HLFPV-BR) was firstly found in a hibiscus plant in Limeira, SP, Brazil. RACE PCR was carried out to obtain the full-length sequences of HLFPV-BR which is 6453 nucleotides and has more than 99.15 % of complete genomic RNA nucleotide sequence identity with that of HLFPV Japanese isolate. The genomic structure of HLFPV-BR is similar to other tobamoviruses. It includes a 5' untranslated region (UTR), followed by open reading frames encoding for a 128-kDa protein and a 188-kDa readthrough protein, a 38-kDa movement protein, 18-kDa coat protein, and a 3' UTR. Interestingly, the unique feature of poly(A) tract is also found within its 3'-UTR. Furthermore, from the total RNA extracted from the local lesions of HLFPV-BR-infected Chenopodium quinoa leaves, a biologically active, full-length cDNA clone encompassing the genome of HLFPV-BR was amplified and placed adjacent to a T7 RNA polymerase promoter. The capped in vitro transcripts from the cloned cDNA were infectious when mechanically inoculated into C. quinoa and Nicotiana benthamiana plants. This is the first report of the presence of an isolate of HLFPV in Brazil and the successful synthesis of a biologically active HLFPV-BR full-length cDNA clone.

  11. A Stylistic Analysis of Linguistic Patterns in Chichamanda Ngozi Adichie’s Purple Hibiscus

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    Muchamad Sholakhuddin Al Fajri

    2017-06-01

    Full Text Available This study aims to carry out a detailed and systematic stylistic analysis of linguistic patterns in Purple Hibiscus Novel by Chichamanda Ngozi Adichie. It particularly analyses a specific extract of the novel in terms of narration and point of view, conversational analysis, speech and thought presentations and mind style, and how these linguistic devices and patterns are employed by the author to shape characters’ personalities and relationships between them in the reader’s mind. The result appears to suggest that the author successfully represents the protagonist, Kambili as an obedient and a salient daughter who respects deeply his father, while her father, Eugene, is constructed as a strict father and religious who imposes an absolute control on his daughter.

  12. Cytotoxic effect of triterpenoids from the root bark of Hibiscus syriacus.

    Science.gov (United States)

    Shi, Li-Shian; Wu, Chao-Hsuan; Yang, Te-Chun; Yao, Chen-Wen; Lin, Hang-Ching; Chang, Wen-Liang

    2014-09-01

    In this study, 4 new triterpenoids-3β- acetoxy-olean-11-en,28,13β-olide (1), 3β- acetoxy-11α,12α-epoxy-olean-28,13β-olide (2), 19α-epi-betulin (3), and 20, 28-epoxy-17β,19β-lupan-3β-ol (4)-and 12 known compounds, were isolated from the root bark of Hibiscus syriacus L. by using acetone extraction. Their structures were characterized by extensive spectroscopic analysis. To investigate cytotoxicity, A549 human lung cancer cells were exposed to the extract and the compounds identified from it. Significantly reduced cell viability was observed with betulin-3-caffeate (12) (IC50, 4.3 μM). The results of this study indicate that betulin-3-caffeate (12) identified from H. syriacus L. may warrant further investigation for potential as anticancer therapies. Copyright © 2014 Elsevier B.V. All rights reserved.

  13. The aqueous extract of Hibiscus sabdariffa calices modulates the production of monocyte chemoattractant protein-1 in humans.

    Science.gov (United States)

    Beltrán-Debón, R; Alonso-Villaverde, C; Aragonès, G; Rodríguez-Medina, I; Rull, A; Micol, V; Segura-Carretero, A; Fernández-Gutiérrez, A; Camps, J; Joven, J

    2010-03-01

    Diet supplementation and/or modulation is an important strategy to significantly improve human health. The search of plants as additional sources of bioactive phenolic compounds is relevant in this context. The aqueous extract of Hibiscus sabdariffa is rich in anthocyanins and other phenolic compounds including hydroxycitric and chlorogenic acids. Using this extract we have shown an effective protection of cultured peripheral blood mononuclear cells from the cellular death induced by H(2)O(2) and a significant role in the production of inflammatory cytokines. In vitro, the extract promotes the production of IL-6 and IL-8 and decreases the concentration of MCP-1 in supernatants in a dose-dependent manner. In humans, the ingestion of an acute dose of the extract (10g) was well tolerated and decreased plasma MCP-1 concentrations significantly without further effects on other cytokines. This effect was not due to a concomitant increase in the antioxidant capacity of plasma. Instead, its mechanisms probably involve a direct inhibition of inflammatory and/or metabolic pathways responsible for MCP-1 production, and may be relevant in inflammatory and chronic conditions in which the role of MCP-1 is well established. If beneficial effects are confirmed in patients, Hibiscus sabdariffa could be considered a valuable traditional herbal medicine for the treatment of chronic inflammatory diseases with the advantage of being devoid of caloric value or potential alcohol toxicity. Copyright 2009 Elsevier GmbH. All rights reserved.

  14. Herbal products containing Hibiscus sabdariffa L., Crataegus spp., and Panax spp.: Labeling and safety concerns.

    Science.gov (United States)

    Nunes, Maria Antónia; Rodrigues, Francisca; Alves, Rita C; Oliveira, Maria Beatriz P P

    2017-10-01

    Herbs have been used from ancient times for infusion preparation based on their potential health effects. In particular, the consumption of Hibiscus sabdariffa L., Crataegus spp. and Panax spp. has been largely associated to cardiovascular benefits. In this work, the label information of 52 herbal products for infusion preparation containing the referred herbs was analyzed and discussed, taking into consideration the European Union regulation for herbal products, which intends to protect public health and harmonize the legal framework in Member States. Details about the cardiovascular-related statements and warning notifications about consumption were considered. Also, regulatory issues and possible herb-drug interactions were explored and discussed. A total of 14 of the 52 herbal products selected presented health claims/statements on the label. Hibiscus was present in the majority of the products and, in some cases, it was mentioned only in the ingredients list and not on the product front-of-pack. Despite the promising outcomes of these plants to modulate cardiovascular risk markers, consumers with some sort of cardiovascular dysfunction and/or under medication treatments should be aware to carefully analyze the labels and consult additional information related to these herbal products. Manufacturers have also a huge responsibility to inform consumers by presenting awareness statements. Lastly, health professionals must advise and alert their patients about possible interactions that could occur between the concomitant consumption of drugs and herbs. Overall, there is still a real need of additional studies and clinical trials to better understand herbs effects and establish a science-based guidance to assess their safety. Copyright © 2017 Elsevier Ltd. All rights reserved.

  15. Beneficial effects of Hibiscus rosa-sinensis L. flower aqueous extract in pregnant rats with diabetes

    Science.gov (United States)

    Afiune, Luana Alves Freitas; Leal-Silva, Thaís; Sinzato, Yuri Karen; Moraes-Souza, Rafaianne Queiroz; Soares, Thaigra Sousa; Campos, Kleber Eduardo; Fujiwara, Ricardo Toshio; Herrera, Emilio; Damasceno, Débora Cristina

    2017-01-01

    Purpose The Hibiscus rosa-sinensis flower is widely used in Brazilian traditional medicine for the treatment of diabetes and has shown antifertility activity in female Wistar rats. However, there is no scientific confirmation of its effect on diabetes and pregnancy. The aim of this study was evaluate the effect of aqueous extract of H. rosa-sinensis flowers on maternal-fetal outcome in pregnant rats with diabetes. Methods Diabetes was induced by streptozotocin (STZ, 40 mg/kg) in virgin, adult, female Wistar rats. After diabetes induction, the rats were mated. The pregnant rats were distributed into four groups (n minimum = 11 animals/group): non-diabetic, non-diabetic treated, diabetic, and diabetic treated. Oral aqueous extract of Hibiscus rosa-sinensis was administered to rats in the treatment groups during pregnancy. At term pregnancy, maternal reproductive outcomes, fetal parameters, and biochemical parameters were analyzed. Results The non-diabetic treated group showed decreased high density lipoprotein cholesterol, increased atherogenic index (AI) and coronary artery risk index (CRI), and increased preimplantation loss rate compared to the non-diabetic group. Although treatment with H. rosa-sinensis led to no toxicity, it showed deleterious effects on cardiac and reproductive functions. However, the diabetic treated group showed increased maternal and fetal weights, reduced AI and CRI, and reduced preimplantation loss rate compared to the untreated diabetic group. Conclusion Our results demonstrate beneficial effects of this flower only in pregnant rats with diabetes and their offspring. Although these findings cannot be extrapolated to human clinical use, they show that the indiscriminate intake of H. rosa-sinensis may be harmful to healthy individuals and its use should be completely avoided in pregnancy. PMID:28644857

  16. Beneficial effects of Hibiscus rosa-sinensis L. flower aqueous extract in pregnant rats with diabetes.

    Science.gov (United States)

    Afiune, Luana Alves Freitas; Leal-Silva, Thaís; Sinzato, Yuri Karen; Moraes-Souza, Rafaianne Queiroz; Soares, Thaigra Sousa; Campos, Kleber Eduardo; Fujiwara, Ricardo Toshio; Herrera, Emilio; Damasceno, Débora Cristina; Volpato, Gustavo Tadeu

    2017-01-01

    The Hibiscus rosa-sinensis flower is widely used in Brazilian traditional medicine for the treatment of diabetes and has shown antifertility activity in female Wistar rats. However, there is no scientific confirmation of its effect on diabetes and pregnancy. The aim of this study was evaluate the effect of aqueous extract of H. rosa-sinensis flowers on maternal-fetal outcome in pregnant rats with diabetes. Diabetes was induced by streptozotocin (STZ, 40 mg/kg) in virgin, adult, female Wistar rats. After diabetes induction, the rats were mated. The pregnant rats were distributed into four groups (n minimum = 11 animals/group): non-diabetic, non-diabetic treated, diabetic, and diabetic treated. Oral aqueous extract of Hibiscus rosa-sinensis was administered to rats in the treatment groups during pregnancy. At term pregnancy, maternal reproductive outcomes, fetal parameters, and biochemical parameters were analyzed. The non-diabetic treated group showed decreased high density lipoprotein cholesterol, increased atherogenic index (AI) and coronary artery risk index (CRI), and increased preimplantation loss rate compared to the non-diabetic group. Although treatment with H. rosa-sinensis led to no toxicity, it showed deleterious effects on cardiac and reproductive functions. However, the diabetic treated group showed increased maternal and fetal weights, reduced AI and CRI, and reduced preimplantation loss rate compared to the untreated diabetic group. Our results demonstrate beneficial effects of this flower only in pregnant rats with diabetes and their offspring. Although these findings cannot be extrapolated to human clinical use, they show that the indiscriminate intake of H. rosa-sinensis may be harmful to healthy individuals and its use should be completely avoided in pregnancy.

  17. Beneficial effects of Hibiscus rosa-sinensis L. flower aqueous extract in pregnant rats with diabetes.

    Directory of Open Access Journals (Sweden)

    Luana Alves Freitas Afiune

    Full Text Available The Hibiscus rosa-sinensis flower is widely used in Brazilian traditional medicine for the treatment of diabetes and has shown antifertility activity in female Wistar rats. However, there is no scientific confirmation of its effect on diabetes and pregnancy. The aim of this study was evaluate the effect of aqueous extract of H. rosa-sinensis flowers on maternal-fetal outcome in pregnant rats with diabetes.Diabetes was induced by streptozotocin (STZ, 40 mg/kg in virgin, adult, female Wistar rats. After diabetes induction, the rats were mated. The pregnant rats were distributed into four groups (n minimum = 11 animals/group: non-diabetic, non-diabetic treated, diabetic, and diabetic treated. Oral aqueous extract of Hibiscus rosa-sinensis was administered to rats in the treatment groups during pregnancy. At term pregnancy, maternal reproductive outcomes, fetal parameters, and biochemical parameters were analyzed.The non-diabetic treated group showed decreased high density lipoprotein cholesterol, increased atherogenic index (AI and coronary artery risk index (CRI, and increased preimplantation loss rate compared to the non-diabetic group. Although treatment with H. rosa-sinensis led to no toxicity, it showed deleterious effects on cardiac and reproductive functions. However, the diabetic treated group showed increased maternal and fetal weights, reduced AI and CRI, and reduced preimplantation loss rate compared to the untreated diabetic group.Our results demonstrate beneficial effects of this flower only in pregnant rats with diabetes and their offspring. Although these findings cannot be extrapolated to human clinical use, they show that the indiscriminate intake of H. rosa-sinensis may be harmful to healthy individuals and its use should be completely avoided in pregnancy.

  18. Phylogeography and genetic structure of Hibiscus tiliaceus--speciation of a pantropical plant with sea-drifted seeds.

    Science.gov (United States)

    Takayama, Koji; Kajita, Tadashi; Murata, Jin; Tateishi, Yoichi

    2006-09-01

    Phylogenetic relationships and the spatial genetic structure of a pantropical plant with sea-drifted seeds, Hibiscus tiliaceus L., and its allied species were investigated. The combined distribution range of these species is over almost the entire littoral area of the tropics worldwide, which might result from the dispersal of their sea-drifted seeds and from recurrent speciation in local populations. A phylogenetic tree constructed using the nucleotide sequences of a c. 7500-bp portion of chloroplast DNA suggested the possibility that recurrent speciation from H. tiliaceus has given rise to all of its allied species. Three major sequence haplotypes of H. tiliaceus had wide and overlapping distributions throughout the Pacific, Atlantic and Indian Ocean regions. This distribution pattern was also confirmed by PCR-SSCP (polymerase chain reaction amplification with single-strand conformation polymorphism) and PCR-SSP (PCR amplification with sequence specific primers) analyses performed on more than 1100 samples from 65 populations worldwide. Statistical analysis using F(ST) and analysis of molecular variance did not show significant genetic differentiation among the H. tiliaceus populations in the three oceanic regions. The results reported here suggested substantial gene flow occurred between populations in the different oceanic regions due to sea-drifted seeds. A strong genetic difference between the Pacific and Atlantic populations of Hibiscus pernambucensis Arruda was observed, which indicates that gene flow in this species between the two regions has been prevented. The wide and dominant distribution of a haplotype shared by H. pernambucensis and H. tiliaceus in the Atlantic region suggests significant introgression between the two species in this region.

  19. Removal of Dye in Wastewater by Adsorption-Coagulation Combined System with Hibiscus sabdariffa as the Coagulant

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    Hoong Ho Nicholas Jian

    2018-01-01

    Full Text Available The conventional process to treat dye wastewater is the physicochemical treatment such as coagulation, flocculation and adsorption process. A new approach has been demonstrated to treat Congo red dye wastewater, which is the adsorption-coagulation hybrid process. Natural coagulant extracted from Hibiscus sabdariffa seeds is used as the coagulant while activated carbon is used as the adsorbent in this case study. The objective of this experiment is to study the significant factors that will affect the efficiency of dye removal. Then, the optimum conditions for the hybrid process is determined using Respond Surface Methodology (RSM. The variables are pH, initial dye concentration, coagulant dosage and adsorbent dosage while the response of experiment is the dye removal percentage. A three-level and four-variable Box-Behnken design (BBD is used for the RSM. A total of 27 sets of experimental results is required to determine the optimum conditions. Jar test is used to conduct the experiment with the addition of coagulant and adsorbent simultaneously. Based on the regression model analysis and ANOVA, the highly significant factors that contribute to the dye removal efficiency through adsorption-coagulation hybrid process are pH of solution and initial dye concentration. The RSM results shows that the optimised process parameters for adsorption-coagulation hybrid process with Hibiscus sabdariffa seeds as the coagulant and activated carbon as the adsorbent are pH 2, initial dye concentration of 385 ppm, coagulant dosage of 209 mg/L and adsorbent dosage of 150 mg/L. The dye removal reaches up to 96.67% under optimum parameters.

  20. Avaliação de diferentes adubações na cultura da vinagreira (Hibiscus sabdariffa, L.)

    OpenAIRE

    Sousa, Maria Ozana; Boyle, Rejane; Bonito, Jorge

    2010-01-01

    O objetivo do presente trabalho foi avaliar o desenvolvimento da planta de vinagreira (Hibiscus sabdariffa L.), produzida com diferentes adubações. O experimento teve duração de 120 dias e constou de seis tratamentos T1: Esterco Bovino; T2: Esterco de Ave; T3: NPK (4-14-8); T4: NPK (4-14-8) + cobertura de N; T5: NPK (4-14-8) + cobertura de K; T6: NPK (4-14-8) + cobertura de N e K. A semeadura foi realizada em 13/12/2008, sendo utilizadas bandejas de isopor de 128 células. Foi utilizada uma se...

  1. [Use of internet and electronic resources among Spanish intensivist physicians. First national survey].

    Science.gov (United States)

    Gómez-Tello, V; Latour-Pérez, J; Añón Elizalde, J M; Palencia-Herrejón, E; Díaz-Alersi, R; De Lucas-García, N

    2006-01-01

    Estimate knowledge and use habits of different electronic resources in a sample of Spanish intensivists: Internet, E-mail, distribution lists, and use of portable electronic devices. Self-applied questionnaire. A 50-question questionnaire was distributed among Spanish intensivists through the hospital marketing delegates of a pharmaceutical company and of electronic forums. A total of 682 questionnaires were analyzed (participation: 74%). Ninety six percent of those surveyed used Internet individually: 67% admitted training gap. Internet was the second source of clinical consultations most used (61%), slightly behind consultation to colleagues (65%). The pages consulted most were bibliographic databases (65%) and electronic professional journals (63%), with limited use of Evidence Based Medicine pages (19%). Ninety percent of those surveyed used e-mail regularly in the practice of their profession, although 25% admitted that were not aware of its possibilities. The use of E-mail decreased significantly with increase in age. A total of 62% of the intensivists used distribution lists. Of the rest, 42% were not aware of its existence and 32% admitted they had insufficient training to handle them. Twenty percent of those surveyed had portable electronic devices and 64% considered it useful, basically due to its rapid consultation at bedside. Female gender was a negative predictive factor of its use (OR 0.35; 95% CI 0.2-0.63; p=0.0002). A large majority of the Spanish intensivists use Internet and E-mail. E-mail lists and use of portable devices are still underused resources. There are important gaps in training and infrequent use of essential pages. There are specific groups that require directed educational policies.

  2. Model of e-learning with electronic educational resources of new generation

    OpenAIRE

    A. V. Loban; D. A. Lovtsov

    2017-01-01

    Purpose of the article: improving of scientific and methodical base of the theory of the е-learning of variability. Methods used: conceptual and logical modeling of the е-learning of variability process with electronic educational resource of new generation and system analysis of the interconnection of the studied subject area, methods, didactics approaches and information and communication technologies means. Results: the formalization complex model of the е-learning of variability with elec...

  3. Impact of Knowledge Resources Linked to an Electronic Health Record on Frequency of Unnecessary Tests and Treatments

    Science.gov (United States)

    Goodman, Kenneth; Grad, Roland; Pluye, Pierre; Nowacki, Amy; Hickner, John

    2012-01-01

    Introduction: Electronic knowledge resources have the potential to rapidly provide answers to clinicians' questions. We sought to determine clinicians' reasons for searching these resources, the rate of finding relevant information, and the perceived clinical impact of the information they retrieved. Methods: We asked general internists, family…

  4. Electronic Document Management: A Human Resource Management Case Study

    Directory of Open Access Journals (Sweden)

    Thomas Groenewald

    2004-11-01

    Full Text Available This case study serve as exemplar regarding what can go wrong with the implementation of an electronic document management system. Knowledge agility and knowledge as capital, is outlined against the backdrop of the information society and knowledge economy. The importance of electronic document management and control is sketched thereafter. The literature review is concluded with the impact of human resource management on knowledge agility, which includes references to the learning organisation and complexity theory. The intervention methodology, comprising three phases, follows next. The results of the three phases are presented thereafter. Partial success has been achieved with improving the human efficacy of electronic document management, however the client opted to discontinue the system in use. Opsomming Die gevalle studie dien as voorbeeld van wat kan verkeerd loop met die implementering van ’n elektroniese dokumentbestuur sisteem. Teen die agtergrond van die inligtingsgemeenskap en kennishuishouding word kennissoepelheid en kennis as kapitaal bespreek. Die literatuurstudie word afgesluit met die inpak van menslikehulpbronbestuur op kennissoepelheid, wat ook die verwysings na die leerorganisasie en kompleksietydsteorie insluit. Die metodologie van die intervensie, wat uit drie fases bestaan, volg daarna. Die resultate van die drie fases word vervolgens aangebied. Slegs gedeelte welslae is behaal met die verbetering van die menslike doeltreffendheid ten opsigte van elektroniese dokumentbestuur. Die klient besluit egter om nie voort te gaan om die huidige sisteem te gebruik nie.

  5. Hibiscus rosa- sinensis leaf extract as coagulant aid in leachate treatment

    Science.gov (United States)

    Awang, Nik Azimatolakma; Aziz, Hamidi Abdul

    2012-12-01

    Hibiscus rosa- sinensis is a biodegradable material that has remained untested for flocculating properties. The objective of this study is to examine the efficiency of coagulation-flocculation processes for the removal of color, iron (Fe3+), suspended solids, turbidity and ammonia nitrogen(NH3-N), from landfill leachate using 4,000 mg/L alum in conjunction with H. rosa- sinensis leaf extract (HBaqs). Hydroxyl (O-H) and (carboxyl) C=O functional groups along the HBaqs chain help to indulge flocculating efficiency of HBaqs via bridging. The experiments confirm the positive coagulation properties of HBaqs. The Fe3+ removal rate using 4,000 mg/L alum as sole coagulant was approximately 60 %, and increased to 100 % when 4,000 mg/L alum was mixed with 500 mg/L HBaqs. By mixing, 4,000 mg/L alum with 100-500 mg/L HBaqs, 72 % of SS was removed as compared with only 45 % reduction using 4,000 mg/L alum as sole coagulant.

  6. Boehmenan, a lignan from Hibiscus ficulneus, showed Wnt signal inhibitory activity.

    Science.gov (United States)

    Shono, Takumi; Ishikawa, Naoki; Toume, Kazufumi; Arai, Midori A; Ahmed, Firoj; Sadhu, Samir K; Ishibashi, Masami

    2015-07-15

    The Wnt signal pathway modulates numerous biological processes, and its aberrant activation is related to various diseases. Therefore, inhibition of the Wnt signal may provide an effective (or efficient) strategy for these diseases. Cell-based luciferase assay targeting the Wnt signal (TOP assay) revealed that Hibiscus ficulneus extract inhibited the Wnt signal. The activity-guided isolation of the MeOH extract of H. ficulneus stems yielded four known (1-4) lignans along with myriceric acid (5). Compounds 1-4 potently inhibited the Wnt signal with TOPflash IC50 values of 1.0, 4.5, 6.3, and 1.9 μM, respectively. Compound 1 exhibited cytotoxicity against both Wnt-dependent (HCT116) and Wnt-independent (RKO) cells. Western blot analysis showed that 1 decreased the expression of full, cytosolic and nuclear β-catenin along with c-myc in STF/293 cells. Our results suggested that 1 may have inhibited the Wnt signal by decreasing β-catenin levels. Copyright © 2015 Elsevier Ltd. All rights reserved.

  7. Análisis comparativo de compuestos fenólicos totales y actividad antioxidante de cuatro marcas de tisanas de Hibiscus sabdariffa (Malvaceae comercializadas en Costa Rica

    Directory of Open Access Journals (Sweden)

    Melissa Agüero

    2014-01-01

    Full Text Available Las tisanas de rosa de Jamaica (Hibiscus sabdariffa son consumidas en Costa Rica por su conocido efecto cardioprotector asociado a la presencia de compuestos fenólicos, principalmente antocianinas. Este trabajo estableció diferencias en el perfil de compuestos fenólicos y su actividad anti-radical entre diferentes comercializadores de tisanas de Hibiscus sabdariffa en Costa Rica. Se identificaron cualitativamente taninos, flavonoides y antocianinas. Se cuantificó la cantidad total de compuestos fenólicos por el método de Folin-Ciocalteu y se cuantificó la actividad antioxidante con el método de DPPH. Todas las marcas comerciales demostraron presencia de compuestos fenólicos, incluyendo antocianinas; sin embargo, se encontraron diferencias significativas en el contenido de compuestos fenólicos y actividad anti-radical, entre los diferentes productores de tisanas. Por ello, se concluye que en el mercado costarricense, el perfil en compuestos fenólicos de las tisanas en estudio varía de acuerdo con el productor.

  8. Challenges in the implementation of an electronic surveillance system in a resource-limited setting: Alerta, in Peru

    Directory of Open Access Journals (Sweden)

    Soto Giselle

    2008-11-01

    Full Text Available Abstract Background Infectious disease surveillance is a primary public health function in resource-limited settings. In 2003, an electronic disease surveillance system (Alerta was established in the Peruvian Navy with support from the U.S. Naval Medical Research Center Detachment (NMRCD. Many challenges arose during the implementation process, and a variety of solutions were applied. The purpose of this paper is to identify and discuss these issues. Methods This is a retrospective description of the Alerta implementation. After a thoughtful evaluation according to the Centers for Disease Control and Prevention (CDC guidelines, the main challenges to implementation were identified and solutions were devised in the context of a resource-limited setting, Peru. Results After four years of operation, we have identified a number of challenges in implementing and operating this electronic disease surveillance system. These can be divided into the following categories: (1 issues with personnel and stakeholders; (2 issues with resources in a developing setting; (3 issues with processes involved in the collection of data and operation of the system; and (4 issues with organization at the central hub. Some of the challenges are unique to resource-limited settings, but many are applicable for any surveillance system. For each of these challenges, we developed feasible solutions that are discussed. Conclusion There are many challenges to overcome when implementing an electronic disease surveillance system, not only related to technology issues. A comprehensive approach is required for success, including: technical support, personnel management, effective training, and cultural sensitivity in order to assure the effective deployment of an electronic disease surveillance system.

  9. Antibacterial Activities of Hibiscus sabdariffa Extracts and Chemical Sanitizers Directly on Green Leaves Contaminated with Foodborne Pathogens.

    Science.gov (United States)

    Gómez-Aldapa, Carlos A; Rangel-Vargas, Esmeralda; Torres-Vitela, Ma Refugio; Villarruel-López, Angélica; Acevedo-Sandoval, Otilio A; Gordillo-Martínez, Alberto J; Godínez-Oviedo, Angélica; Castro-Rosas, Javier

    2018-02-01

    Leafy greens have been associated with foodborne disease outbreaks in different countries. To decrease microbial contamination of leafy greens, chemical agents are commonly used; however, a number of studies have shown these agents to have limited antimicrobial effect against pathogenic bacteria on vegetables. The objective of this study was to compare the antibacterial effect of Hibiscus sabdariffa calyx extracts (water, methanol, acetone, and ethyl acetate), sodium hypochlorite, acetic acid, and colloidal silver against foodborne bacteria on leafy greens. Thirteen foodborne bacteria were used in the study: Listeria monocytogenes, Shigella flexneri, Salmonella serotypes Typhimurium Typhi, and Montevideo, Staphylococcus aureus, Escherichia coli O157:H7, five E. coli pathotypes (Shiga toxin-producing, enteropathogenic, enterotoxigenic, enteroinvasive, and enteroaggregative), and Vibrio cholerae O1. Each foodborne bacterium was separately inoculated on romaine lettuce, spinach, and coriander leaves. Separately, contaminated leafy greens were immersed in four hibiscus extracts and in sanitizers for 5 min. Next, green leaves were washed with sterile tap water. Separately, each green leaf was placed in a bag that contained 0.1% sterile peptone water and was rubbed for 2 min. Counts were done by plate count using appropriate dilutions (in sterile peptone water) of the bacterial suspensions spread on Trypticase soy agar plates and incubated at 35 ± 2°C for 48 h. Statistically significant differences ( P caused a significantly greater reduction ( P contaminated romaine lettuce, spinach, and coriander than did the sodium hypochlorite, colloidal silver, and acetic acid. Dry roselle calyx extracts may potentially be a useful addition to disinfection procedures for romaine lettuce, spinach, and coriander.

  10. The impact of CO2 enrichment on fiber dimension and lignocellulose properties of three varieties of kenaf (Hibiscus cannabinus L.)

    OpenAIRE

    Mahdi Khalatbari, A; Jaafar, H.Z.E; Ali Khalatbari, A

    2014-01-01

    The effects of two different carbon dioxide levels on fiber yield, fiber dimension and lignocelluloses properties of three varieties of kenaf (Hibiscus cannabinus L.) namely Fuhong (FH991), V36 and Kohn-Kaen60 (KK60) were assessed in a growth house experiment at faculty of Agriculture, Universiti Putra Malaysia. Seeds were sown in polyethylene bags containing top (loamy soil). Carbon dioxide enrichment treatment started when the seedlings reached four weeks and plants were exposed to 400 and ...

  11. Considering Point-of-Care Electronic Medical Resources in Lieu of Traditional Textbooks for Medical Education.

    Science.gov (United States)

    Hale, LaDonna S; Wallace, Michelle M; Adams, Courtney R; Kaufman, Michelle L; Snyder, Courtney L

    2015-09-01

    Selecting resources to support didactic courses is a critical decision, and the advantages and disadvantages must be carefully considered. During clinical rotations, students not only need to possess strong background knowledge but also are expected to be proficient with the same evidence-based POC resources used by clinicians. Students place high value on “real world” learning and therefore may place more value on POC resources that they know practicing clinicians use as compared with medical textbooks. The condensed nature of PA education requires students to develop background knowledge and information literacy skills over a short period. One way to build that knowledge and those skills simultaneously is to use POC resources in lieu of traditional medical textbooks during didactic training. Electronic POC resources offer several advantages over traditional textbooks and should be considered as viable options in PA education.

  12. Variability of cirrus clouds in a convective outflow during the Hibiscus campaign

    Science.gov (United States)

    Fierli, F.; di Donfrancesco, G.; Cairo, F.; Marécal, V.; Zampieri, M.; Orlandi, E.; Durry, G.

    2008-08-01

    Light-weight microlidar and water vapour measurements were taken on-board a stratospheric balloon during the HIBISCUS 2004 campaign, held in Bauru, Brazil (49° W, 22° S). Cirrus clouds were observed throughout the flight between 12 and 15 km height with a high mesoscale variability in optical and microphysical properties. It was found that the cirrus clouds were composed of different layers characterized by marked differences in height, thickness and optical properties. Simultaneous water vapour observations show that the different layers are characterized by different values of the saturation with respect to ice. A mesoscale simulation and a trajectory analysis clearly revealed that the clouds had formed in the outflow of a large and persistent convective region and that the observed variability of the optical properties and of the cloud structure is likely linked to the different residence times of the convectively-processed air in the upper troposphere.

  13. Evaluation of the Potential Nephroprotective and Antimicrobial Effect of Camellia sinensis Leaves versus Hibiscus sabdariffa (In Vivo and In Vitro Studies)

    OpenAIRE

    Anwar Ibrahim, Doa'a; Noman Albadani, Rowida

    2014-01-01

    Green tea and hibiscus are widely consumed as traditional beverages in Yemen and some regional countries. They are relatively cheap and the belief is that they improve health state and cure many diseases. The aim of this study was to evaluate the potential protective and antibacterial activity of these two famous plants in vitro through measuring their antibacterial activity and in vivo through measuring nonenzymatic kidney markers dysfunction after induction of nephrotoxicity by gentamicin. ...

  14. Resource conservation approached with an appropriate collection and upgrade-remanufacturing for used electronic products.

    Science.gov (United States)

    Zlamparet, Gabriel I; Tan, Quanyin; Stevels, A B; Li, Jinhui

    2018-03-01

    This comparative research represents an example for a better conservation of resources by reducing the amount of waste (kg) and providing it more value under the umbrella of remanufacturing. The three discussed cases will expose three issues already addressed separately in the literature. The generation of waste electrical and electronic equipment (WEEE) interacts with the environmental depletion. In this article, we gave the examples of addressed issues under the concept of remanufacturing. Online collection opportunity eliminating classical collection, a business to business (B2B) implementation for remanufactured servers and medical devices. The material reuse (recycling), component sustainability, reuse (part harvesting), product reuse (after repair/remanufacturing) indicates the recovery potential using remanufacturing tool for a better conservation of resources adding more value to the products. Our findings can provide an overview of new system organization for the general collection, market potential and the technological advantages using remanufacturing instead of recycling of WEEE or used electrical and electronic equipment. Copyright © 2017. Published by Elsevier Ltd.

  15. Aqueous Extract from Hibiscus sabdariffa Linnaeus Ameliorate Diabetic Nephropathy via Regulating Oxidative Status and Akt/Bad/14-3-3γ in an Experimental Animal Model

    Directory of Open Access Journals (Sweden)

    Shou-Chieh Wang

    2011-01-01

    Full Text Available Several studies point out that oxidative stress maybe a major culprit in diabetic nephropathy. Aqueous extract of Hibiscus sabdariffa L. (HSE has been demonstrated as having beneficial effects on anti-oxidation and lipid-lowering in experimental studies. This study aimed at investigating the effects of Hibiscus sabdariffa L. on diabetic nephropathy in streptozotocin induced type 1 diabetic rats. Our results show that HSE is capable of reducing lipid peroxidation, increasing catalase and glutathione activities significantly in diabetic kidney, and decreasing the plasma levels of triglyceride, low-density lipoprotein (LDL and increasing high-density lipoprotein (HDL value. In histological examination, HSE improves hyperglycemia-caused osmotic diuresis in renal proximal convoluted tubules (defined as hydropic change in diabetic rats. The study also reveals that up-regulation of Akt/Bad/14-3-3γ and NF-κB-mediated transcription might be involved. In conclusion, our results show that HSE possesses the potential effects to ameliorate diabetic nephropathy via improving oxidative status and regulating Akt/Bad/14-3-3γ signaling.

  16. Effects of the Use of Electronic Human Resource Management (EHRM Within Human Resource Management (HRM Functions at Universities

    Directory of Open Access Journals (Sweden)

    Chux Gervase Iwu

    2016-09-01

    Full Text Available This study set out to examine the effect of e-hrm systems in assisting human resource practitioners to execute their duties and responsibilities. In comparison to developed economies of the world, information technology adoption in sub-Saharan Africa has not been without certain glitches. Some of the factors that are responsible for these include poor need identification, sustainable funding, and insufficient skills. Besides these factors, there is also the issue of change management and users sticking to what they already know. Although, the above factors seem negative, there is strong evidence that information systems such as electronic human resource management present benefits to an organization. To achieve this, a dual research approach was utilized. Literature assisted immensely in both the development of the conceptual framework upon which the study hinged as well as in the development of the questionnaire items. The study also made use of an interview checklist to guide the participants. The findings reveal a mix of responses that indicate that while there are gains in adopting e-hrm systems, it is wiser to consider supporting resources as well as articulate the needs of the university better before any investment is made.

  17. Electronic human resource management: Enhancing or entrancing?

    Directory of Open Access Journals (Sweden)

    Paul Poisat

    2017-07-01

    Full Text Available Orientation: This article provides an investigation into the current level of development of the body of knowledge related to electronic human resource management (e-HRM by means of a qualitative content analysis. Several aspects of e-HRM, namely definitions of e-HRM, the theoretical perspectives around e-HRM, the role of e-HRM, the various types of e-HRM and the requirements for successful e-HRM, are examined. Research purpose: The purpose of the article was to determine the status of e-HRM and examine the studies that report on the link between e-HRM and organisational productivity. Motivation for the study: e-HRM has the capacity to improve organisational efficiency and leverage the role of human resources (HR as a strategic business partner. Main findings: The notion that the implementation of e-HRM will lead to improved organisational productivity is commonly assumed; however, empirical evidence in this regard was found to be limited. Practical/managerial implications: From the results of this investigation it is evident that more research is required to gain a greater understanding of the influence of e-HRM on organisational productivity, as well as to develop measures for assessing this influence. Contribution: This article proposes additional areas to research and measure when investigating the effectiveness of e-HRM. It provides a different lens from which to view e-HRM assessment whilst keeping it within recognised HR measurement parameters (the HR value chain. In addition, it not only provides areas for measuring e-HRM’s influence but also provides important clues as to how the measurements may be approached.

  18. The physical properties, lignin distribution, chemical composition of fibers and gas exchange rate of kenaf (Hibiscus cannabinus L.) varieties under prolonged water deficiency

    OpenAIRE

    Khalatbari, A.M; Jaafar, Z.E; Khalatbari, A. A; Hazandy, A.H; Mohd Ridzwan, A. H

    2016-01-01

    The fundamental characteristics and physical properties of kenaf (Hibiscus cannabinus L.) fibers cultivated and subjected to three different water frequencies in Universiti Putra Malaysia, were analyzed. For deep analysis, which includes micro-scale viewing for identification of kenaf cell wall structure, fibers were viewed in order to study the physical characteristics, anatomy, and lignin distribution. The chemical composition was determined considering Technical Association of Pulp and Pap...

  19. Identifying and evaluating electronic learning resources for use in adult-gerontology nurse practitioner education.

    Science.gov (United States)

    Thompson, Hilaire J; Belza, Basia; Baker, Margaret; Christianson, Phyllis; Doorenbos, Ardith; Nguyen, Huong

    2014-01-01

    Enhancing existing curricula to meet newly published adult-gerontology advanced practice registered nurse (APRN) competencies in an efficient manner presents a challenge to nurse educators. Incorporating shared, published electronic learning resources (ELRs) in existing or new courses may be appropriate in order to assist students in achieving competencies. The purposes of this project were to (a) identify relevant available ELR for use in enhancing geriatric APRN education and (b) to evaluate the educational utility of identified ELRs based on established criteria. A multilevel search strategy was used. Two independent team members reviewed identified ELR against established criteria to ensure utility. Only resources meeting all criteria were retained. Resources were found for each of the competency areas and included formats such as podcasts, Web casts, case studies, and teaching videos. In many cases, resources were identified using supplemental strategies and not through traditional search or search of existing geriatric repositories. Resources identified have been useful to advanced practice educators in improving lecture and seminar content in a particular topic area and providing students and preceptors with additional self-learning resources. Addressing sustainability within geriatric APRN education is critical for sharing of best practices among educators and for sustainability of teaching and related resources. © 2014.

  20. In Vitro Digestibility of Aluminum from Hibiscus sabdariffa Hot Watery Infusion and Its Concentration in Urine of Healthy Individuals.

    Science.gov (United States)

    Frankova, Adela; Malik, Jan; Drabek, Ondrej; Szakova, Jirina; Sperlingova, Ilona; Kloucek, Pavel; Novy, Pavel; Tejnecky, Vaclav; Landa, Premysl; Leuner, Ogla; Kokoska, Ladislav

    2016-12-01

    Increased ingestion of aluminum (Al) can lead to its accumulation in the human body, especially in people with kidney problems. Al is also associated with several nervous diseases and its negative influence on embryo development during pregnancy has been proven in animal models. Hibiscus sabdariffa L. petals are widely used alone or in fruit tea formulas, which are recommended for drinking during pregnancy instead of tea. Its petals can contain similar and even higher amounts of Al as tea, which is a known Al accumulator. Our research investigated whether the regular intake of H. sabdariffa infusion leads to increased burden of Al. Sixteen days of ingestion of H. sabdariffa infusion (c Al  = 0.5 mg.L -1 ) led to increased but unbalanced levels (15-86 μg L -1 ) of Al in urine compared to a period when the infusion was not ingested. The highest amounts of Al excreted were observed every third day during the ingestion. Mild health problems, such as nausea and dizziness (which could be related to plant properties) were reported by more sensitive volunteers.Our results suggest that the tea infusion from H. sabdariffa petals increases body burden of Al and, therefore, sensitive individuals as pregnant women and people with kidney problems should be cautious with excessive consumption of hibiscus infusion or fruit teas containing this plant. However, further study including more individuals is needed to fully confirm our preliminary results.

  1. In vitro synergistic effect of Hibiscus sabdariffa aqueous extract in combination with standard antibiotics against Helicobacter pylori clinical isolates.

    Science.gov (United States)

    Hassan, Sherif T S; Berchová, Kateřina; Majerová, Michaela; Pokorná, Marie; Švajdlenka, Emil

    2016-09-01

    Context The increasing problem of drug-resistant strains has led to the failure of current treatment regimens of Helicobacter pylori (HP) infection. Recently, a new treatment strategy has been developed to overcome the problem by using natural products in combination with antibiotics to enhance the treatment efficacy. Objective The antimicrobial combinatory effect of the aqueous extract of Hibiscus sabdariffa L. (Malvaceae) (AEHS) with antibiotics (clarithromycin, CLA; amoxicillin, AMX; metronidazole, MTZ) has been evaluated in vitro against HP strains. Materials and methods Hibiscus calyces (35 g) were brewed in 250 mL of boiled water for 30 min, and minimum inhibitory concentrations (MICs) were determined by agar dilution method. The checkerboard assay was used to evaluate the antimicrobial combinatory effect according to the sum of fractional inhibitory concentration (∑FIC) indices. Results In this study, AEHS exerted remarkable bacteriostatic effect against all HP strains tested with MICs values ranging from 9.18 to 16.68 μg/mL. Synergy effect of AEHS with CLA or MTZ was obtained against four of seven HP strains tested with ∑FIC ranging from 0.21 to 0.39. The additive effect of AEHS with AMX was obtained against five of seven HP strains tested with ∑FIC ranging from 0.61 to 0.91. Conclusion This study presents AEHS as a potent therapeutic candidate alone, or in combination with antibiotics for the treatment of HP infection.

  2. Systematic review of electronic surveillance of infectious diseases with emphasis on antimicrobial resistance surveillance in resource-limited settings.

    Science.gov (United States)

    Rattanaumpawan, Pinyo; Boonyasiri, Adhiratha; Vong, Sirenda; Thamlikitkul, Visanu

    2018-02-01

    Electronic surveillance of infectious diseases involves rapidly collecting, collating, and analyzing vast amounts of data from interrelated multiple databases. Although many developed countries have invested in electronic surveillance for infectious diseases, the system still presents a challenge for resource-limited health care settings. We conducted a systematic review by performing a comprehensive literature search on MEDLINE (January 2000-December 2015) to identify studies relevant to electronic surveillance of infectious diseases. Study characteristics and results were extracted and systematically reviewed by 3 infectious disease physicians. A total of 110 studies were included. Most surveillance systems were developed and implemented in high-income countries; less than one-quarter were conducted in low-or middle-income countries. Information technologies can be used to facilitate the process of obtaining laboratory, clinical, and pharmacologic data for the surveillance of infectious diseases, including antimicrobial resistance (AMR) infections. These novel systems require greater resources; however, we found that using electronic surveillance systems could result in shorter times to detect targeted infectious diseases and improvement of data collection. This study highlights a lack of resources in areas where an effective, rapid surveillance system is most needed. The availability of information technology for the electronic surveillance of infectious diseases, including AMR infections, will facilitate the prevention and containment of such emerging infectious diseases. Copyright © 2018 Association for Professionals in Infection Control and Epidemiology, Inc. Published by Elsevier Inc. All rights reserved.

  3. Anti hypoxic and antioxidant activity of Hibiscus esculentus seeds

    Energy Technology Data Exchange (ETDEWEB)

    Ebrahimzadeh, M. A.; Nabavi, S. F.; Nabavi, S. M.; Eslami, B.

    2010-07-01

    The anti hypoxic and antioxidant activities of Hibiscus esculentus seeds were investigated employing eight in vitro assay systems. Anti hypoxic activity was investigated in two models, haemic and circulatory. The effects were pronounced in both models of hypoxia. The anti hypoxic effects were dose-dependent. The results indicated that the extracts have a protective effect against hypoxia induced lethality in mice. The extracts showed antioxidant activity in some models. IC{sub 5}0 for DPPH radical-scavenging activity was 234 {+-} 8.9 {mu}g ml{sup 1}. The extracts showed weak nitric oxide-scavenging activity between 0.1 and 1.6 mg ml{sup -}1. The extracts showed weak Fe{sup 2}+ chelating ability. IC{sub 5}0 were 150 {+-} 13 {mu}g ml{sup -}1. The extracts also exhibited low antioxidant activity in the linoleic acid model but were capable of scavenging hydrogen peroxide in a concentration dependent manner. The total amount of phenolic compounds in each extract was determined as gallic acid equivalents and total flavonoid contents were calculated as quercetin equivalents from a calibration curve. Pharmacological effects may be attributed, at least in part, to the presence of phenols and flavonoids in the extracts. (Author) 40 refs.

  4. From Millennium ERM to Proquest 360 Resource Manager: Implementing a new Electronic Resources Management System ERMS in an International Graduate Research University in Saudi Arabia

    KAUST Repository

    Ramli, Rindra M.

    2017-01-01

    An overview of the Recommendation Study and the subsequent Implementation of a new Electronic Resources Management system ERMS in an international graduate research university in the Kingdom of Saudi Arabia. It covers the timeline, deliverables

  5. Genetic Diversity of Hibiscus tiliaceus (Malvaceae) in China Assessed using AFLP Markers

    Science.gov (United States)

    TANG, TIAN; ZHONG, YANG; JIAN, SHUGUANG; SHI, SUHUA

    2003-01-01

    Amplified fragment length polymorphism (AFLP) markers were used to investigate the genetic variations within and among nine natural populations of Hibiscus tiliaceus in China. DNA from 145 individuals was amplified with eight primer pairs. No polymorphisms were found among the 20 samples of a marginal population of recent origin probably due to a founder effect. Across the other 125 individuals, 501 of 566 bands (88·5 %) were polymorphic, and 125 unique AFLP phenotypes were observed. Estimates of genetic diversity agreed with life history traits of H. tiliaceus and geographical distribution. AMOVA analysis revealed that most genetic diversity resided within populations (84·8 %), which corresponded to results reported for outcrossing plants. The indirect estimate of gene flow based on ϕST was moderate (Nm = 1·395). Long-distance dispersal of floating seeds and local environments may play an important role in shaping the genetic diversity of the population and the genetic structure of this species. PMID:12930729

  6. Synthesis of silver nanoparticles by radiolysis, photolysis and chemical reduction of AgNO3 in Hibiscus sabdariffa infusion (karkade)

    International Nuclear Information System (INIS)

    Cataldo, Franco; Ursini, Ornella; Angelini, Giancarlo

    2016-01-01

    Silver nanoparticles of different average diameters were synthesized by γ-radiolysis, UV-photolysis and chemical reduction of AgNO 3 solutions in Hibiscus sabdariffa infusion commonly known as 'karkade'. The UV-photolysis was performed either by using a conventional Hg low pressure lamp emitting at 254 nm and also by using a new compact UV-LED source emitting at 360 nm. The kinetics rate constant of silver nanoparticles synthesis produced by γ-radiolysis and UV photolysis were determined and the average diameter of the resulting nanoparticles was estimated. (author)

  7. Functional and antioxidant properties of novel snack crackers incorporated with Hibiscus sabdariffa by-product

    Science.gov (United States)

    Ahmed, Zahra S.; Abozed, Safaa S.

    2014-01-01

    The Hibiscus sabdariffa calyxes’ residue (HSR) remained after the extraction of beverage is discarded which contributes to environmental pollution. The objective of this study was to explore the suitability of incorporating different amount of HSR (0%, 1.25%, 2.5%, 3.75%, and 5.0%) in crackers to enhance dietary fiber and antioxidant content. Physicochemical properties, antioxidants activity, nutritional quality, sensory profile and microstructure properties of samples containing HSR were examined and compared with control crackers. Cracker protein and fat levels decreased as HSR increased from 0.0% to 5% while ash increased. The total dietary fiber DF increased from 3.36% to 8.17% where the highest DF was reached at 5% HSR. The content of phenols increased from 5.99 to 17.57 mg/g and total flavonoid content increased from 49.36 to 104.63 mg/g of crackers incorporated with 5% HSR. DPPH radical scavenging activity increased two fold by increasing HSR up to 5%. HSR containing crackers exhibited darker L values than none/less HSR containing ones. In sensory ranking tests, acceptable crackers with pleasant flavor were obtained by incorporating up to 3.75% HSR into the cracker’s formula. Crackers prepared with 5% HSR received the poorest sensory rating compared to non/less HSR enriched cracker. Scanning electron microscopy (EM) images of the prepared crackers revealed marked changes caused by incorporating HSR as upon HSR addition the surface was observed to be scratched, cracker and rougher. Overall results suggest that HSR is a potential functional food ingredient high in fiber content and antioxidants activity that may be processed into flour and used in food applications, such as baked goods. PMID:25685546

  8. Effects of abscisic acid on ethylene biosynthesis and perception in Hibiscus rosa-sinensis L. flower development

    Science.gov (United States)

    Trivellini, Alice; Ferrante, Antonio; Vernieri, Paolo; Serra, Giovanni

    2011-01-01

    The effect of the complex relationship between ethylene and abscisic acid (ABA) on flower development and senescence in Hibiscus rosa-sinensis L. was investigated. Ethylene biosynthetic (HrsACS and HrsACO) and receptor (HrsETR and HrsERS) genes were isolated and their expression evaluated in three different floral tissues (petals, style–stigma plus stamens, and ovaries) of detached buds and open flowers. This was achieved through treatment with 0.1 mM 1-aminocyclopropane-1-carboxylic acid (ACC) solution, 500 nl l−1 methylcyclopropene (1-MCP), and 0.1 mM ABA solution. Treatment with ACC and 1-MCP confirmed that flower senescence in hibiscus is ethylene dependent, and treatment with exogenous ABA suggested that ABA may play a role in this process. The 1-MCP impeded petal in-rolling and decreased ABA content in detached open flowers after 9 h. This was preceded by an earlier and sequential increase in ABA content in 1-MCP-treated petals and style–stigma plus stamens between 1 h and 6 h. ACC treatment markedly accelerated flower senescence and increased ethylene production after 6 h and 9 h, particularly in style–stigma plus stamens. Ethylene evolution was positively correlated in these floral tissues with the induction of the gene expression of ethylene biosynthetic and receptor genes. Finally, ABA negatively affected the ethylene biosynthetic pathway and tissue sensitivity in all flower tissues. Transcript abundance of HrsACS, HrsACO, HrsETR, and HrsERS was reduced by exogenous ABA treatment. This research underlines the regulatory effect of ABA on the ethylene biosynthetic and perception machinery at a physiological and molecular level when inhibitors or promoters of senescence are exogenously applied. PMID:21841180

  9. Evolution of diffraction and self-diffraction phenomena in thin films of Gelite Bloom/Hibiscus Sabdariffa

    Science.gov (United States)

    Cano-Lara, Miroslava; Severiano-Carrillo, Israel; Trejo-Durán, Mónica; Alvarado-Méndez, Edgar

    2017-09-01

    In this work, we present a study of non-linear optical response in thin films elaborated with Gelite Bloom and extract of Hibiscus Sabdariffa. Non-linear refraction and absorption effects were studied experimentally (Z-scan technique) and numerically, by considering the transmittance as non-linear absorption and refraction contribution. We observe large phase shifts to far field, and diffraction due to self-phase modulation of the sample. Diffraction and self-diffraction effects were observed as time function. The aim of studying non-linear optical properties in thin films is to eliminate thermal vortex effects that occur in liquids. This is desirable in applications such as non-linear phase contrast, optical limiting, optics switches, etc. Finally, we find good agreement between experimental and theoretical results.

  10. Effects of 60Co γ-rays irradiation on germination and seedling growth of Hibiscus syriacus

    International Nuclear Information System (INIS)

    Li Xiufen; Wu Fulan; Zhang Deshun; Meng Zhennong; Cao Jiyun

    2009-01-01

    The seeds of Hibiscus syria cus were irradiated by 60 Co γ-rays at dose rate of 50 ∼ 500Gy/h for 0.5 and 1h, the seed germination rate and the seedling growth characters were surveyed. The results indicated that the seed germination was promoted when the absorbed dose was below 200Gy, and the seedling survival rate was increased when the dose was below 100Gy. The germination was inhibited, leaves and secondary roots were difficult to form, and the seedlings blasting occurred when the dose was over 200Gy. The dose rate affects the irradiation results. Absorbed dosed of 50 ∼ 100Gy were suggested for increasing seedling growth rate and 100 ∼ 200Gy were recommend for mutagenesis. (authors)

  11. Open-Source Electronic Health Record Systems for Low-Resource Settings: Systematic Review.

    Science.gov (United States)

    Syzdykova, Assel; Malta, André; Zolfo, Maria; Diro, Ermias; Oliveira, José Luis

    2017-11-13

    Despite the great impact of information and communication technologies on clinical practice and on the quality of health services, this trend has been almost exclusive to developed countries, whereas countries with poor resources suffer from many economic and social issues that have hindered the real benefits of electronic health (eHealth) tools. As a component of eHealth systems, electronic health records (EHRs) play a fundamental role in patient management and effective medical care services. Thus, the adoption of EHRs in regions with a lack of infrastructure, untrained staff, and ill-equipped health care providers is an important task. However, the main barrier to adopting EHR software in low- and middle-income countries is the cost of its purchase and maintenance, which highlights the open-source approach as a good solution for these underserved areas. The aim of this study was to conduct a systematic review of open-source EHR systems based on the requirements and limitations of low-resource settings. First, we reviewed existing literature on the comparison of available open-source solutions. In close collaboration with the University of Gondar Hospital, Ethiopia, we identified common limitations in poor resource environments and also the main requirements that EHRs should support. Then, we extensively evaluated the current open-source EHR solutions, discussing their strengths and weaknesses, and their appropriateness to fulfill a predefined set of features relevant for low-resource settings. The evaluation methodology allowed assessment of several key aspects of available solutions that are as follows: (1) integrated applications, (2) configurable reports, (3) custom reports, (4) custom forms, (5) interoperability, (6) coding systems, (7) authentication methods, (8) patient portal, (9) access control model, (10) cryptographic features, (11) flexible data model, (12) offline support, (13) native client, (14) Web client,(15) other clients, (16) code

  12. Physicochemical Properties and Oxidative Storage Stability of Milled Roselle (Hibiscus sabdariffa L. Seeds

    Directory of Open Access Journals (Sweden)

    Nurul Hanisah Juhari

    2018-02-01

    Full Text Available Milled Roselle (Hibiscus sabdariffa L. seeds of the UMKL cultivar were analyzed for proximate composition, water and oil absorption capacity, and the influence of storage conditions on storage stability. The storage stability was determined under four types of conditions: light/oxygen (air (LO, light/nitrogen (LN, darkness/oxygen (air (DO, and darkness/nitrogen (DN while monitoring for seven consecutive months. During the storage period, the formation of volatiles was determined using dynamic headspace sampling and Gas Chromatography-Mass Spectrometry (GC-MS analysis. In total, 85 volatiles were identified, mainly aldehydes, alcohols, ketones, furans, and acids indicating lipid oxidation. It is recommended that milled Roselle seeds should be flushed with nitrogen and stored in darkness. Under these conditions, the seeds can be stored for at least three months without changes in volatile profile. This is important to ensure the good quality of milled Roselle seeds for further commercialization.

  13. Physicochemical Properties and Oxidative Storage Stability of Milled Roselle (Hibiscus sabdariffa L.) Seeds.

    Science.gov (United States)

    Juhari, Nurul Hanisah; Petersen, Mikael Agerlin

    2018-02-11

    Milled Roselle ( Hibiscus sabdariffa L.) seeds of the UMKL cultivar were analyzed for proximate composition, water and oil absorption capacity, and the influence of storage conditions on storage stability. The storage stability was determined under four types of conditions: light/oxygen (air) (LO), light/nitrogen (LN), darkness/oxygen (air) (DO), and darkness/nitrogen (DN) while monitoring for seven consecutive months. During the storage period, the formation of volatiles was determined using dynamic headspace sampling and Gas Chromatography-Mass Spectrometry (GC-MS) analysis. In total, 85 volatiles were identified, mainly aldehydes, alcohols, ketones, furans, and acids indicating lipid oxidation. It is recommended that milled Roselle seeds should be flushed with nitrogen and stored in darkness. Under these conditions, the seeds can be stored for at least three months without changes in volatile profile. This is important to ensure the good quality of milled Roselle seeds for further commercialization.

  14. Aqueous calyxes extract of Roselle or Hibiscus sabdariffa Linn supplementation improves liver morphology in streptozotocin induced diabetic rats.

    Science.gov (United States)

    Nazratun Nafizah, Akhtar Husin; Budin, Siti Balkis; Zaryantey, Abd Hamid; Mariati, Abd Rahman; Santhana, Raj Louis; Osman, Mohamad; Muhd Hanis, Md Idris; Jamaludin, Mohamed

    2017-03-01

    The complex series of deleterious events among diabetes patients leads to multiple organ failure. Therefore, a holistic approach of treatment is urgently required to prevent worsening of complications. The present investigation was carried out to study the possible protective effects of Roselle or Hibiscus sabdariffa Linn (HSL) calyxes aqueous extract, as an antidiabetic and antioxidant agent against oxidative liver injury in streptozotocin-induced diabetic rats. A single dose of streptozotocin (45mg/kg body weight, iv) was used to induced diabetes in male Sprague Dawley rats which were then divided into two groups: Diabetic control (DC) and HSL-treated diabetic (DR) group. Normal rats were divided into normal control (NC), HSL-treated control (NR). Aqueous calyxes extract of HSL (100mg/kg/day, orally) was given for 28 consecutive days in the treated group. Weight, biochemical and histopathological (light and electron microscopic) parameters were compared in all groups. Supplementation of HSL significantly lowered the level of fasting blood glucose and increased plasma insulin level in DR group compared to DC group (p<0.05). Alanine aminotransaminases and aspartate aminotransferase enzymes level were found to be significantly reduced in DR compared to DC. Microscopic examination demonstrated destruction of the liver architecture, cytoplasmic vacuolation of the hepatocytes and signs of necrosis in diabetic rats. Moreover, dilatation and congestion of blood vessels with leucocytes adherence were detected. Ultrastructural study using electron microscope showed homogeneous substance accumulation in nuclear chromatin, a decrease of organelles and mitochondrial degeneration in the diabetic rats. Administration of HSL in diabetic rats causes significant decrease in hepatocyte destruction and prevented the changes associated with the diabetic condition. Thus, our findings provide a scientific rationale for the use of HSL as promising agent in preventing liver injury in

  15. Development and evaluation of Ketoprofen sustained release matrix tablet using Hibiscus rosa-sinensis leaves mucilage

    Directory of Open Access Journals (Sweden)

    M. Kaleemullah

    2017-07-01

    Full Text Available Currently, the use of natural gums and mucilage is of increasing importance in pharmaceutical formulations as valuable drug excipient. Natural plant-based materials are economic, free of side effects, biocompatible and biodegradable. Therefore, Ketoprofen matrix tablets were formulated by employing Hibiscus rosa-sinensis leaves mucilage as natural polymer and HPMC (K100M as a synthetic polymer to sustain the drug release from matrix system. Direct compression method was used to develop sustained released matrix tablets. The formulated matrix tablets were evaluated in terms of physical appearance, weight variation, thickness, diameter, hardness, friability and in vitro drug release. The difference between the natural and synthetic polymers was investigated concurrently. Matrix tablets developed from each formulation passed all standard physical evaluation tests. The dissolution studies of formulated tablets revealed sustained drug release up to 24 h compared to the reference drug Apo Keto® SR tablets. The dissolution data later were fitted into kinetic models such as zero order equation, first order equation, Higuchi equation, Hixson Crowell equation and Korsmeyer-Peppas equation to study the release of drugs from each formulation. The best formulations were selected based on the similarity factor (f2 value of 50% and more. Through the research, it is found that by increasing the polymers concentration, the rate of drug release decreased for both natural and synthetic polymers. The best formulation was found to be F3 which contained 40% Hibiscus rosa-sinensis mucilage polymer and showed comparable dissolution profile to the reference drug with f2 value of 78.03%. The release kinetics of this formulation has shown to follow non-Fickian type which involved both diffusion and erosion mechanism. Additionally, the statistical results indicated that there was no significant difference (p > 0.05 between the F3 and reference drug in terms of MDT and

  16. Development and evaluation of Ketoprofen sustained release matrix tablet using Hibiscus rosa-sinensis leaves mucilage.

    Science.gov (United States)

    Kaleemullah, M; Jiyauddin, K; Thiban, E; Rasha, S; Al-Dhalli, S; Budiasih, S; Gamal, O E; Fadli, A; Eddy, Y

    2017-07-01

    Currently, the use of natural gums and mucilage is of increasing importance in pharmaceutical formulations as valuable drug excipient. Natural plant-based materials are economic, free of side effects, biocompatible and biodegradable. Therefore, Ketoprofen matrix tablets were formulated by employing Hibiscus rosa-sinensis leaves mucilage as natural polymer and HPMC (K100M) as a synthetic polymer to sustain the drug release from matrix system. Direct compression method was used to develop sustained released matrix tablets. The formulated matrix tablets were evaluated in terms of physical appearance, weight variation, thickness, diameter, hardness, friability and in vitro drug release. The difference between the natural and synthetic polymers was investigated concurrently. Matrix tablets developed from each formulation passed all standard physical evaluation tests. The dissolution studies of formulated tablets revealed sustained drug release up to 24 h compared to the reference drug Apo Keto® SR tablets. The dissolution data later were fitted into kinetic models such as zero order equation, first order equation, Higuchi equation, Hixson Crowell equation and Korsmeyer-Peppas equation to study the release of drugs from each formulation. The best formulations were selected based on the similarity factor ( f 2 ) value of 50% and more. Through the research, it is found that by increasing the polymers concentration, the rate of drug release decreased for both natural and synthetic polymers. The best formulation was found to be F3 which contained 40% Hibiscus rosa-sinensis mucilage polymer and showed comparable dissolution profile to the reference drug with f 2 value of 78.03%. The release kinetics of this formulation has shown to follow non-Fickian type which involved both diffusion and erosion mechanism. Additionally, the statistical results indicated that there was no significant difference (p > 0.05) between the F3 and reference drug in terms of MDT and T50% with p

  17. Evaluation of three electronic report processing systems for preparing hydrologic reports of the U.S Geological Survey, Water Resources Division

    Science.gov (United States)

    Stiltner, G.J.

    1990-01-01

    In 1987, the Water Resources Division of the U.S. Geological Survey undertook three pilot projects to evaluate electronic report processing systems as a means to improve the quality and timeliness of reports pertaining to water resources investigations. The three projects selected for study included the use of the following configuration of software and hardware: Ventura Publisher software on an IBM model AT personal computer, PageMaker software on a Macintosh computer, and FrameMaker software on a Sun Microsystems workstation. The following assessment criteria were to be addressed in the pilot studies: The combined use of text, tables, and graphics; analysis of time; ease of learning; compatibility with the existing minicomputer system; and technical limitations. It was considered essential that the camera-ready copy produced be in a format suitable for publication. Visual improvement alone was not a consideration. This report consolidates and summarizes the findings of the electronic report processing pilot projects. Text and table files originating on the existing minicomputer system were successfully transformed to the electronic report processing systems in American Standard Code for Information Interchange (ASCII) format. Graphics prepared using a proprietary graphics software package were transferred to all the electronic report processing software through the use of Computer Graphic Metafiles. Graphics from other sources were entered into the systems by scanning paper images. Comparative analysis of time needed to process text and tables by the electronic report processing systems and by conventional methods indicated that, although more time is invested in creating the original page composition for an electronically processed report , substantial time is saved in producing subsequent reports because the format can be stored and re-used by electronic means as a template. Because of the more compact page layouts, costs of printing the reports were 15% to 25

  18. Essential trace elements content in a sudanese meal of cooked Hibiscus Sp. leaves as determined by both X-ray florescence and atomic absorption spectroscopy techniques

    International Nuclear Information System (INIS)

    Mohamed, S.M; Taha, M.H.

    2003-01-01

    Essential trace elements content of a Sudanese meal of cooked Karkadi plant leaves (Hibiscus Sp)was determined and found to be several folds higher than the average trace element content of Sudanese food as determined in twenty nine daily consumed mixed diets. Therefore, this plant can act as a promising natural supplement in cases of deficiency provided it is grown in a trace element rich soil. (Author)

  19. OPTIMIZATION OF HIBISCUS SABDARIFFA L. (ROSELLE ANTHOCYANIN AQUEOUS-ETHANOL EXTRACTION PARAMETERS USING RESPONSE SURFACE METHODOLOGY

    Directory of Open Access Journals (Sweden)

    ANILÚ MIRANDA-MEDINA

    2018-03-01

    Full Text Available Anthocyanins along with protocatechuic acid and quercetin have been recognized as bioactive compounds in Hibiscus sabdariffa L. aqueous extracts. Characteristic anthocyanin absorption in the visible region makes their quantification possible without the interference of the other two compounds, and also can favor its potential application as an alternative to organic-based dye sensitized solar cell, in various forms. In order to optimize measurable factors linked to the extraction of these flavonoids, an optimization was performed using a Box-Behnken experimental design and response surface methodology (RSM. Three levels of ethanol concentration, temperature and solid-solvent ratio (SSR were investigated. The optimization model showed that with 96 % EtOH, 65 °C, and 1:50 SSR, the highest anthocyanin concentration of 150 mg/100 g was obtained.

  20. Pengaruh Konsentrasi Gula dan Ragi Dalam Pembuatan Cuka Dari Rosella (Hibiscus sabdariffa.L Terhadap Mutu Cuka Rosella

    Directory of Open Access Journals (Sweden)

    Firdausni Firdausni

    2013-12-01

    Full Text Available Rosellla (Hibiscus sabdariffa.L has been traditionally used as nutritious functional beverages. Rosella flowers contain flavonoid secondary metabolites, terpenoids, and vitamin C, which are considered as antioxidant. Research aims to see the effect of sugar and yeast  on quality of vinegar. The study was conducted with the treatment of sugar utilization (10, 15, 20, 25 %, fermentation with yeast Saccharomyces cerevisiae (2, 4, 6 g and fermentation time until three weeks. Rosella vinegar as a results of fermentation further was analyzed the pH, acetic acid content, extract content and antioxidant activity test consisted of qualitative test of phenolic, flavonoid, and % inhibition. Result of the optimal research was obtained in the treatment of sugar utilization 20% and the addition of yeast 6 g with analysis result of pH 2.67, acetic acid 14.80%, extract content 7.15%, and % inhibition 31%, moreover it contained phenolic and flavonoidscompounds qalitatively.ABSTRAKRosellla (Hibiscus sabdariffa.L telah digunakan secara tradisional sebagai minuman yang berkhasiat fungsional. Bunga rosella mengandung flavonoid metabolit sekunder, terpenoid, dan vitamin C yang berfungsi sebagai antioksidan. Penelitian ini bertujuan untuk melihat pengaruh pemakaian gula dan ragi  terhadap mutu cuka. Penelitian dilakukan dengan perlakuan penggunaan gula pasir (10, 15, 20, 25 %, fermentasi dengan ragi Saccharomyces cerevisiae (2, 4, 6 g dan waktu fermentasi  sampai tiga minggu. Hasil fermentasi berupa cuka rosella selanjutnya diuji pH, kandungan asam asetat, kadar sari dan uji aktifitas antioksidan yang terdiri dari uji kualitatif fenolik, flavonoid, dan % inhibisi. Hasil penelitian optimal diperoleh pada perlakuan penggunaan gula 20% dan penambahan ragi 6 g dengan hasil analisis pH 2,67, asam asetat 14,80%, kadar sari 7,15% dan % inhibisi 31% serta secara kualitatif mengandung senyawaan fenolik dan flavonoid.

  1. Use and User Perception of Electronic Information Resources: A Case Study of Siva Institute of Frontier Technology, India

    Directory of Open Access Journals (Sweden)

    Velmurugan Chandran

    2013-12-01

    Full Text Available The present study aims to explore the use and user perception of electronic resources in Siva Institute of Frontier Technology, India. A total number of 123 users were taken into account for the study through a questionnaire-based survey method. A well-structured questionnaire was designed and distributed to the selected 200 students and staff members. 123 copies of the questionnaires were returned dully filled in and the overall response rate was 61.50 percent. The questionnaire contained both open- and close-ended questions. The collected data were classified, analyzed, and tabulated by using simple statistical methods. This study covers the impact of electronic resources on students and faculty in their academic pursuit.

  2. A preliminary categorization of end-of-life electrical and electronic equipment as secondary metal resources

    International Nuclear Information System (INIS)

    Oguchi, Masahiro; Murakami, Shinsuke; Sakanakura, Hirofumi; Kida, Akiko; Kameya, Takashi

    2011-01-01

    Highlights: → End-of-life electrical and electronic equipment (EEE) as secondary metal resources. → The content and the total amount of metals in specific equipment are both important. → We categorized 21 EEE types from contents and total amounts of various metals. → Important equipment types as secondary resources were listed for each metal kind. → Collectability and possible collection systems of various EEE types were discussed. - Abstract: End-of-life electrical and electronic equipment (EEE) has recently received attention as a secondary source of metals. This study examined characteristics of end-of-life EEE as secondary metal resources to consider efficient collection and metal recovery systems according to the specific metals and types of EEE. We constructed an analogy between natural resource development and metal recovery from end-of-life EEE and found that metal content and total annual amount of metal contained in each type of end-of-life EEE should be considered in secondary resource development, as well as the collectability of the end-of-life products. We then categorized 21 EEE types into five groups and discussed their potential as secondary metal resources. Refrigerators, washing machines, air conditioners, and CRT TVs were evaluated as the most important sources of common metals, and personal computers, mobile phones, and video games were evaluated as the most important sources of precious metals. Several types of small digital equipment were also identified as important sources of precious metals; however, mid-size information and communication technology (ICT) equipment (e.g., printers and fax machines) and audio/video equipment were shown to be more important as a source of a variety of less common metals. The physical collectability of each type of EEE was roughly characterized by unit size and number of end-of-life products generated annually. Current collection systems in Japan were examined and potentially appropriate collection

  3. Principles of formation of the content of an educational electronic resource on the basis of general and didactic patterns of learning

    Directory of Open Access Journals (Sweden)

    Ольга Юрьевна Заславская

    2018-12-01

    Full Text Available The article considers the influence of the development of technical means of teaching on the effectiveness of educational and methodical resources. Modern opportunities of information and communication technologies allow creating electronic educational resources that represent educational information that automates the learning process, provide information assistance, if necessary, collect and process statistical information on the degree of development of the content of the school material by schoolchildren, set an individual trajectory of learning, and so on. The main principle of data organization is the division of the training course into separate sections on the thematic elements and components of the learning process. General regularities include laws that encompass the entire didactic system, and in specific (particular cases, those whose actions extend to a separate component (aspect of the system. From the standpoint of the existence of three types of electronic training modules in the aggregate content of the electronic learning resource - information, control and module of practical classes - the principles of the formation of the electronic learning resource, in our opinion, should regulate all these components. Each of the certain principles is considered in the groups: scientific orientation, methodological orientation, systemic nature, accounting of interdisciplinary connections, fundamentalization, systematic and dosage sequence, rational use of study time, accessibility, minimization, operationalization of goals, unified identification diagnosis.

  4. Functional and antioxidant properties of novel snack crackers incorporated with Hibiscus sabdariffa by-product

    Directory of Open Access Journals (Sweden)

    Zahra S. Ahmed

    2015-01-01

    Full Text Available The Hibiscus sabdariffa calyxes’ residue (HSR remained after the extraction of beverage is discarded which contributes to environmental pollution. The objective of this study was to explore the suitability of incorporating different amount of HSR (0%, 1.25%, 2.5%, 3.75%, and 5.0% in crackers to enhance dietary fiber and antioxidant content. Physicochemical properties, antioxidants activity, nutritional quality, sensory profile and microstructure properties of samples containing HSR were examined and compared with control crackers. Cracker protein and fat levels decreased as HSR increased from 0.0% to 5% while ash increased. The total dietary fiber DF increased from 3.36% to 8.17% where the highest DF was reached at 5% HSR. The content of phenols increased from 5.99 to 17.57 mg/g and total flavonoid content increased from 49.36 to 104.63 mg/g of crackers incorporated with 5% HSR. DPPH radical scavenging activity increased two fold by increasing HSR up to 5%. HSR containing crackers exhibited darker L values than none/less HSR containing ones. In sensory ranking tests, acceptable crackers with pleasant flavor were obtained by incorporating up to 3.75% HSR into the cracker’s formula. Crackers prepared with 5% HSR received the poorest sensory rating compared to non/less HSR enriched cracker. Scanning electron microscopy (EM images of the prepared crackers revealed marked changes caused by incorporating HSR as upon HSR addition the surface was observed to be scratched, cracker and rougher. Overall results suggest that HSR is a potential functional food ingredient high in fiber content and antioxidants activity that may be processed into flour and used in food applications, such as baked goods.

  5. Physicochemical properties and antimicrobial activity of Roselle (Hibiscus sabdariffa L.).

    Science.gov (United States)

    Jung, EunKyung; Kim, YoungJun; Joo, Nami

    2013-12-01

    The therapeutic action of a plant depends on its chemical constituents. In this study, experiments were carried out in order to evaluate the effect of extraction conditions on the antioxidative and antimicrobial activities of Roselle (Hibiscus sabdariffa L.). Roselle was found to be rich in malic acid, anthocyanins, ascorbic acid and minerals, especially Ca and Fe, but low in glucose. More than 18 volatile compounds were identified by gas chromatography and gas chromatography-mass spectrometry. This herb, which is rich in phenolic compounds and displays DPPH radical scavenging activity, could be a good source of natural antioxidants. The antimicrobial activity of the Roselle water and ethanol extracts was tested with Bacillus subtilis (ATCC6633), Staphylococcus aureus (ATCC6538) and Escherichia coli (ATCC 8739). The inhibition of the Roselle ethanol extract against B. subtilis and S. aureus was slightly higher than that of water extract but this difference was not significant. However, E. coli was strongly inhibited by the Roselle water extract at concentrations of 25 and 50 mg mL(-1) as determined by a paper disc method. The obtained results indicated that antioxidant and antimicrobial activity was related to different methods of extraction and Roselle extracts could be a source of therapeutically useful products. © 2013 Society of Chemical Industry.

  6. From Millennium ERM to Proquest 360 Resource Manager: Implementing a new Electronic Resources Management System ERMS in an International Graduate Research University in Saudi Arabia

    KAUST Repository

    Ramli, Rindra M.

    2017-05-17

    An overview of the Recommendation Study and the subsequent Implementation of a new Electronic Resources Management system ERMS in an international graduate research university in the Kingdom of Saudi Arabia. It covers the timeline, deliverables and challenges as well as lessons learnt by the Project Team.

  7. Estruturas secretoras de mucilagem em Hibiscus pernambucensis Arruda (Malvaceae: distribuição, caracterização morfoanatômica e histoquímica Mucilage-secreting structures of Hibiscus pernambucensis Arruda (Malvaceae: distribution, morphoanatomical and histochemical characterization

    Directory of Open Access Journals (Sweden)

    Joecildo Francisco Rocha

    2011-12-01

    Full Text Available No presente trabalho foram estudadas as estruturas secretoras de mucilagem de Hibiscus pernambucensis aos microscópios de luz e de varredura. Conhecida como guaxima-do-mangue e algodão-do-brejo, é espécie nativa encontrada no litoral brasileiro, vegetando áreas de manguezal e restinga, tendo grande importância ecológica nestes ecossistemas. É importante produtora de fibras têxteis e celulose, fornece abundante mucilagem suscetível das mesmas aplicações medicinais de outras malváceas, além da presença de tanino. Coléteres, glândulas peroladas, tricomas secretores longo-pedunculados, canais, cavidades e idioblastos foram observados. Os coléteres ocorrem no ápice caulinar, estípulas, primórdios foliares, folhas, sépalas e pétalas jovens. As glândulas peroladas são encontradas nas superfícies adaxial e abaxial dos primórdios foliares. Os canais e as cavidades encontram-se distribuídos nos eixos vegetativo aéreo e reprodutivo. Os idioblastos ocorrem nas raízes, em estágios primários e secundários de desenvolvimento e no mesofilo foliar. A secreção presente nas diferentes estruturas secretoras é constituída predominantemente por polissacarídeos ácidos e neutros, podendo ocorrer proteínas, lipídeos e substâncias fenólicas. A presença de mucilagem, tanto na superfície como no interior dos órgãos, em diferentes fases do ciclo vegetativo e reprodutivo, representa um importante mecanismo adaptativo e de sobrevivência da espécie aos ambientes de restinga e mangue.This work studied the mucilage-secreting structures of Hibiscus pernambucensis using light and scanning electron microscopy. Known as guaxima-do-mangue, algodão-do-brejo and embira-do-mangue, this species is a native shrub that occurs in mangrove and restinga along the Brazilian coast, and is important in the production of textile fibers and cellulose, provides abundant mucilage that is used medicinally like other Malvaceae species, and has tannins

  8. The Synthesis of the Hierarchical Structure of Information Resources for Management of Electronic Commerce Entities

    Directory of Open Access Journals (Sweden)

    Krutova Anzhelika S.

    2017-06-01

    Full Text Available The aim of the article is to develop the theoretical bases for the classification and coding of economic information and the scientific justification of the content of information resources of an electronic commerce enterprise. The essence of information resources for management of electronic business entities is investigated. It is proved that the organization of accounting in e-commerce systems is advisable to be built on the basis of two circuits: accounting for financial flows and accounting associated with transformation of business factors in products and services as a result of production activities. There presented a sequence of accounting organization that allows to combine the both circuits in a single information system, which provides a possibility for the integrated replenishment and distributed simultaneous use of the e-commerce system by all groups of users. It is proved that the guarantee of efficient activity of the information management system of electronic commerce entities is a proper systematization of the aggregate of information resources on economic facts and operations of an enterprise in accordance with the management tasks by building the hierarchy of accounting nomenclatures. It is suggested to understand nomenclature as an objective, primary information aggregate concerning a certain fact of the economic activity of an enterprise, which is characterized by minimum requisites, is entered into the database of the information system and is to be reflected in the accounting system. It is proposed to build a database of e-commerce systems as a part of directories (constants, personnel, goods / products, suppliers, buyers and the hierarchy of accounting nomenclatures. The package of documents regulating the organization of accounting at an enterprise should include: the provision on the accounting services, the order on the accounting policy, the job descriptions, the schedules of information exchange, the report card and

  9. Binary Solvent Extraction System and Extraction Time Effects on Phenolic Antioxidants from Kenaf Seeds (Hibiscus cannabinus L.) Extracted by a Pulsed Ultrasonic-Assisted Extraction

    OpenAIRE

    Yu Hua Wong; Hwee Wen Lau; Chin Ping Tan; Kamariah Long; Kar Lin Nyam

    2014-01-01

    The aim of this study was to determine the best parameter for extracting phenolic-enriched kenaf (Hibiscus cannabinus L.) seeds by a pulsed ultrasonic-assisted extraction. The antioxidant activities of ultrasonic-assisted kenaf seed extracts (KSE) were determined by a 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging capacity assay, 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) radical scavenging assay, β -carotene bleaching inhibition assay, and ferric reducing antioxi...

  10. Controlling user access to electronic resources without password

    Science.gov (United States)

    Smith, Fred Hewitt

    2015-06-16

    Described herein are devices and techniques for remotely controlling user access to a restricted computer resource. The process includes pre-determining an association of the restricted computer resource and computer-resource-proximal environmental information. Indicia of user-proximal environmental information are received from a user requesting access to the restricted computer resource. Received indicia of user-proximal environmental information are compared to associated computer-resource-proximal environmental information. User access to the restricted computer resource is selectively granted responsive to a favorable comparison in which the user-proximal environmental information is sufficiently similar to the computer-resource proximal environmental information. In at least some embodiments, the process further includes comparing user-supplied biometric measure and comparing it with a predetermined association of at least one biometric measure of an authorized user. Access to the restricted computer resource is granted in response to a favorable comparison.

  11. Direct surface analysis coupled to high-resolution mass spectrometry reveals heterogeneous composition of the cuticle of Hibiscus trionum petals.

    Science.gov (United States)

    Giorio, Chiara; Moyroud, Edwige; Glover, Beverley J; Skelton, Paul C; Kalberer, Markus

    2015-10-06

    Plant cuticle, which is the outermost layer covering the aerial parts of all plants including petals and leaves, can present a wide range of patterns that, combined with cell shape, can generate unique physical, mechanical, or optical properties. For example, arrays of regularly spaced nanoridges have been found on the dark (anthocyanin-rich) portion at the base of the petals of Hibiscus trionum. Those ridges act as a diffraction grating, producing an iridescent effect. Because the surface of the distal white region of the petals is smooth and noniridescent, a selective chemical characterization of the surface of the petals on different portions (i.e., ridged vs smooth) is needed to understand whether distinct cuticular patterns correlate with distinct chemical compositions of the cuticle. In the present study, a rapid screening method has been developed for the direct surface analysis of Hibiscus trionum petals using liquid extraction surface analysis (LESA) coupled with high-resolution mass spectrometry. The optimized method was used to characterize a wide range of plant metabolites and cuticle monomers on the upper (adaxial) surface of the petals on both the white/smooth and anthocyanic/ridged regions, and on the lower (abaxial) surface, which is entirely smooth. The main components detected on the surface of the petals are low-molecular-weight organic acids, sugars, and flavonoids. The ridged portion on the upper surface of the petal is enriched in long-chain fatty acids, which are constituents of the wax fraction of the cuticle. These compounds were not detected on the white/smooth region of the upper petal surface or on the smooth lower surface.

  12. Electronic theses and dissertations: a review of this valuable resource for nurse scholars worldwide.

    Science.gov (United States)

    Goodfellow, L M

    2009-06-01

    A worldwide repository of electronic theses and dissertations (ETDs) could provide worldwide access to the most up-to-date research generated by masters and doctoral students. Until that international repository is established, it is possible to access some of these valuable knowledge resources. ETDs provide a technologically advanced medium with endless multimedia capabilities that far exceed the print and bound copies of theses and dissertations housed traditionally in individual university libraries. CURRENT USE: A growing trend exists for universities worldwide to require graduate students to submit theses or dissertations as electronic documents. However, nurse scholars underutilize ETDs, as evidenced by perusing bibliographic citation lists in many of the research journals. ETDs can be searched for and retrieved through several digital resources such as the Networked Digital Library of Theses and Dissertations (http://www.ndltd.org), ProQuest Dissertations and Theses (http://www.umi.com), the Australasian Digital Theses Program (http://adt.caul.edu.au/) and through individual university web sites and online catalogues. An international repository of ETDs benefits the community of nurse scholars in many ways. The ability to access recent graduate students' research electronically from anywhere in the world is advantageous. For scholars residing in developing countries, access to these ETDs may prove to be even more valuable. In some cases, ETDs are not available for worldwide access and can only be accessed through the university library from which the student graduated. Public access to university library ETD collections is not always permitted. Nurse scholars from both developing and developed countries could benefit from ETDs.

  13. Evaluation of reticulated gelatin-hibiscus-propolis against intestinal commensal species commonly associated with urinary tract infections.

    Science.gov (United States)

    Olier, Maïwenn; Sekkal, Soraya; Harkat, Cherryl; Eutamene, Hélène; Theodorou, Vassilia

    2017-05-01

    Reticulated gelatin (RG), hibiscus and propolis (RGHP) is a medical device that can reduce the bacterial adherence to epithelial cultured cells and invasion by enteropathogens, thus gathering relevant properties to decrease the risk of urinary tract infections (UTIs). We aimed at evaluating in Wistar rats the efficacy of RGHP, RG and vehicle against intestinal commensals commonly involved in UTIs. Animals received orally (with supplemental Na 2 CO 3 ): RGHP 1540 mg/day/rat; RG 500 mg/day/rat or vehicle. RGHP significantly reduced fecal Escherichia coli and Enterococcus spp. levels without affecting other targeted Enterobacteriaceae. The antagonistic property of RGHP was confirmed in streptomycin-pretreated rats highly colonized with a human commensal E. coli strain with uropathogenic potential. RGHP may decrease the risk of UTIs by reducing colonization by opportunistic uropathogens.

  14. Library resources on the Internet

    Science.gov (United States)

    Buchanan, Nancy L.

    1995-07-01

    Library resources are prevalent on the Internet. Library catalogs, electronic books, electronic periodicals, periodical indexes, reference sources, and U.S. Government documents are available by telnet, Gopher, World Wide Web, and FTP. Comparatively few copyrighted library resources are available freely on the Internet. Internet implementations of library resources can add useful features, such as full-text searching. There are discussion lists, Gophers, and World Wide Web pages to help users keep up with new resources and changes to existing ones. The future will bring more library resources, more types of library resources, and more integrated implementations of such resources to the Internet.

  15. IAA oxidase activity in relation to adventitious root formation on stem cuttings of some forest tree species. [Salix tetrasperma, Populus Robusta, Hibiscus rosa-sinensis, Eucalyptus citriodora

    Energy Technology Data Exchange (ETDEWEB)

    Bansal, M.P.; Nanda, K.K.

    1981-01-01

    In rooting tests with stem cuttings, IAA oxidase activity was found to be very high in Salix tetrasperma and Populus 'Robusta' both of which rooted profusely, less in Hibiscus rosa-sinensis which rooted but weakly and insignificant in Eucalyptus citriodora, which did not root at all. Proteins extracted from the stem cuttings of E. citriodora inhibited IAA oxidase activity, and also root formation on hypocotyl cuttings of Phaseolus mungo.

  16. Protective effect of Hibiscus sabdariffa against serum/glucose deprivation-induced PC12 cells injury

    Science.gov (United States)

    Bakhtiari, Elham; Hosseini, Azar; Mousavi, Seyed Hadi

    2015-01-01

    Objectives: Findings natural products with antioxidant and antiapoptotic properties has been one of the interesting challenges in the search for the treatment of neurodegenerative diseases including ischemic stroke. Serum/glucose deprivation (SGD) has been used as a model for the understanding of the molecular mechanisms of neuronal damage during ischemia in vitro and for the expansion of neuroprotective drugs against ischemia-induced brain injury. Recent studies showed that Hibiscus sabdariffa exert pharmacological actions such as potent antioxidant. Therefore, in this study we investigated the protective effect of extract of H. sabdariffa against SGD-induced PC12 cells injury. Materials and Methods: Cells were pretreated with different concentrations of H. sabdariffa extract (HSE) for 2 hr, and then exposed to SGD condition for 6, 12 and 18 hr. Results: SGD caused a major reduction in cell viability after 6, 12, and 18 hr as compared with control cells (psabdariffa has the potential to be used as a new therapeutic approach for neurodegenerative disorders. PMID:26101756

  17. ELECTRONIC EDUCATIONAL RESOURCES FOR ONLINE SUPPORT OF MODERN CHEMISTRY CLASSES IN SPECIALIZED SCHOOL

    Directory of Open Access Journals (Sweden)

    Maria D. Tukalo

    2013-09-01

    Full Text Available This article contains material of some modern electronic educational resources that can be used via the Internet to support the modern chemistry classes in specialized school. It was drawn attention to the educational chemical experiments as means of knowledge; simulated key motivational characteristics to enhance students interest for learning subjects, their cognitive and practical activity in the formation of self-reliance and self-creative; commented forecasts for creating of conditions to enhance the creative potential of students in a modern learning environment.

  18. Selection and Evaluation of Electronic Resources

    Directory of Open Access Journals (Sweden)

    Doğan Atılgan

    2013-11-01

    Full Text Available Publication boom and issues related to controlling and accession of printed sources have created some problems after World War II. Consequently, publishing industry has encountered the problem of finding possible solution for emerged situation. Industry of electronic publishing has started to improve with the rapid increase of the price of printed sources as well as the problem of publication boom. The first effects of electronic publishing were appeared on the academic and scholarly publications then electronic publishing became a crucial part of all types of publications. As a result of these developments, collection developments and service policies of information centers were also significantly changed. In this article, after a general introduction about selection and evaluation processes of electronic publications, the subscribed databases by a state and a privately owned university in Turkey and their usage were examined.

  19. Retting effect of kenaf bast fiber by electron beam irradiation

    Energy Technology Data Exchange (ETDEWEB)

    Shin, Hye Kyoung; Kangm Hyo Kyoung; Jeun, Joon Pyo; Kang, Phil Hyun [Korea Atomic Energy Research Institute, Jeongeup (Korea, Republic of)

    2010-06-15

    Kenaf (Hibiscus cannabinus) retting were separated from a kenaf bast fiber by a combination of Electron beam irradiation (EBI) and NaOH solution treatment. The methods were based on a 6% NaOH solution treatment after various doses of EBI. FT-IR spectroscopy demonstrated that the content of lignin and hemicellulose in the retted kenaf fibers decreased as the EBI dose increased. Specifically, the lignin in the retted kenaf fiber treated with 300 kGy of EBI was almost completely removed. The morphology of retted kenaf fibers were characterized by SEM image, and the studies showed that the fibrillated degree of retted kenaf fibers treated with various EBI doses and was increased as EBI dose increased. The retted kenaf fibers treated with the EBI at 300 kGy was uniformly fibrillated with 10 {approx} 30 {mu}m diameters.

  20. Retting effect of kenaf bast fiber by electron beam irradiation

    International Nuclear Information System (INIS)

    Shin, Hye Kyoung; Kangm Hyo Kyoung; Jeun, Joon Pyo; Kang, Phil Hyun

    2010-01-01

    Kenaf (Hibiscus cannabinus) retting were separated from a kenaf bast fiber by a combination of Electron beam irradiation (EBI) and NaOH solution treatment. The methods were based on a 6% NaOH solution treatment after various doses of EBI. FT-IR spectroscopy demonstrated that the content of lignin and hemicellulose in the retted kenaf fibers decreased as the EBI dose increased. Specifically, the lignin in the retted kenaf fiber treated with 300 kGy of EBI was almost completely removed. The morphology of retted kenaf fibers were characterized by SEM image, and the studies showed that the fibrillated degree of retted kenaf fibers treated with various EBI doses and was increased as EBI dose increased. The retted kenaf fibers treated with the EBI at 300 kGy was uniformly fibrillated with 10 ∼ 30 μm diameters

  1. An Exploratory study on the use of LibAnswers to Resolve, Track and Monitor Electronic Resources Issues: The KAUST Library experience

    KAUST Repository

    Ramli, Rindra M.

    2017-01-01

    An Exploratory study on KAUST library use of LibAnswers in resolving electronic resources questions received in LibAnswers. It describes the findings of the questions received in LibAnswers. The author made suggestions based on the findings to improve the reference services in responding to e-resources questions.

  2. An Exploratory study on the use of LibAnswers to Resolve, Track and Monitor Electronic Resources Issues: The KAUST Library experience

    KAUST Repository

    Ramli, Rindra M.

    2017-05-03

    An Exploratory study on KAUST library use of LibAnswers in resolving electronic resources questions received in LibAnswers. It describes the findings of the questions received in LibAnswers. The author made suggestions based on the findings to improve the reference services in responding to e-resources questions.

  3. Survival and preference of cotton boll weevil adults for alternative food sources

    Directory of Open Access Journals (Sweden)

    M. Pimenta

    Full Text Available Abstract Plants that have potential as alternative food source (floral nectar, pollen and plant tissues to the boll weevil during the intercropping season were evaluated considering the prevalent conditions of Cerrado in the Central Brazil. Initially, we tested the nutritional adequacy for the survival of the insect of flower resource (pollen and nectar provided by eight plant species (fennel, mexican sunflower, castor bean, okra, hibiscus, sorghum, pigeonpea and sunn hemp. Subsequently, we tested if the resources provided by the selected plants continued to be exploited by the boll weevil in the presence of cotton plant, its main food source average longevity of boll weevil adults was significantly longer when they were fed on hibiscus’ flowers (166.6 ± 74.4 and okra flowers (34.7 ± 28.9 than when they fed on flowers of other six species. Subsequently, the preference of the boll weevil in the use of resources was compared between okra or hibiscus and cotton plants, in dual choice experiments. Boll weevils preferred plants of the three species in the reproductive stages than those in vegetative stages. Although the cotton plant in the reproductive stage was the most preferred plant of all, boll weevils preferred flowering okra and hibiscus than cotton at the vegetative stage.

  4. The level of the usage of the human resource information system and electronic recruitment in Croatian companies

    Directory of Open Access Journals (Sweden)

    Snježana Pivac

    2014-12-01

    Full Text Available Performing business according to contemporary requirements influences companies for continuous usage of modern managerial tools, such as a human resource information system (HRIS and electronic recruitment (ER. Human resources have been recognised as curtail resources and the main source of a competitive advantage in creation of successful business performance. In order to attract and select the top employees, companies use quality information software for attracting internal ones, and electronic recruitment for attracting the best possible external candidates. The main aim of this paper is to research the level of the usage of HRIS and ER within medium-size and large Croatian companies. Moreover, the additional aim of this paper is to evaluate the relationship among the usage of these modern managerial tools and the overall success of human resource management within these companies. For the purpose of this paper, primary and secondary research has been conducted in order to reveal the level of the usage of HRIS and ER as well as the overall success of human resource management in Croatian companies. The companies’ classification (HRIS and ER is done by using the non-hierarchical k-means cluster method as well as the nonparametric Kruskal Wallis test. Further, the companies are ranked by the multicriteria PROMETHEE method. Relevant nonparametric tests are used for testing the overall companies’ HRM. Finally, binary logistic regression is estimated, relating binary variable HRM and HRIS development. After detailed research, it can be concluded that large Croatian companies apply HRIS in majority (with a positive relation to HRM performance, but still require certain degrees of its development.

  5. The electronic encapsulation of knowledge in hydraulics, hydrology and water resources

    Science.gov (United States)

    Abbott, Michael B.

    The rapidly developing practice of encapsulating knowledge in electronic media is shown to lead necessarily to the restructuring of the knowledge itself. The consequences of this for hydraulics, hydrology and more general water-resources management are investigated in particular relation to current process-simulation, real-time control and advice-serving systems. The generic properties of the electronic knowledge encapsulator are described, and attention is drawn to the manner in which knowledge 'goes into hiding' through encapsulation. This property is traced in the simple situations of pure mathesis and in the more complex situations of taxinomia using one example each from hydraulics and hydrology. The consequences for systems architectures are explained, pointing to the need for multi-agent architectures for ecological modelling and for more general hydroinformatics systems also. The relevance of these developments is indicated by reference to ongoing projects in which they are currently being realised. In conclusion, some more general epistemological aspects are considered within the same context. As this contribution is so much concerned with the processes of signification and communication, it has been partly shaped by the theory of semiotics, as popularised by Eco ( A Theory of Semiotics, Indiana University, Bloomington, 1977).

  6. RESEARCH OF INFLUENCE OF QUALITY OF ELECTRONIC EDUCATIONAL RESOURCES ON QUALITY OF TRAINING WITH USE OF DISTANCE TECHNOLOGIES

    Directory of Open Access Journals (Sweden)

    H. M. Kravtsov

    2013-03-01

    Full Text Available Communication improving of educational processes requires today new approaches to the management arrangements and forming of educational policy in the field of distance learning, which is based on the use of modern information and communication technologies. An important step in this process is the continuous monitoring of the development and implementation of information technology and, in particular, the distance learning systems in higher educational establishments. The main objective of the monitoring is the impact assessment on the development of distance learning following the state educational standards, curricula, methodical and technical equipment and other factors; factors revelation that influence the implementation and outcomes of distance learning; results comparison of educational institution functioning and distance education systems in order to determine the most efficient ways of its development. The paper presents the analysis results of the dependence of the quality of educational services on the electronic educational resources. Trends in educational services development was studied by comparing the quality influence of electronic educational resources on the quality of educational services of higher pedagogical educational institutions of Ukraine as of 2009-2010 and 2012-2013. Generally, the analysis of the survey results allows evaluating quality of the modern education services as satisfactory and it can be said that almost 70% of the success of their future development depends on the quality of the used electronic educational resources and distance learning systems in particular.

  7. Hibiscus sabdariffa L extract drying with different carrier agent: Drying rate evaluation and color analysis

    Science.gov (United States)

    Djaeni, M.; Utari, F. D.; Kumoro, A. C.

    2017-03-01

    The aim of this study was to investigate the effect of different carrier agents on roselle or Hibiscus sabdariffa L.extract drying. Carrier agent was used for reducing stickiness of material and avoiding agglomeration as well as improving stability. The method consisted of two steps involving roselle extraction and drying process. The liquid roselle extract was mixed with carrier agent (maltodextrin-arabic gum) in various composition. The mixture was then dried at different air temperature ranging 40 - 80°C. As a response, moisture content in the extract was observed by gravimetry every 10 minutes during90 minutes. The procedurewas repeated for the drying without carrieragent. The result showed that constant rate of drying with carrier agent was higher up to l.7 times than that of without carrier agent. Based on the color analysis,roselle extract drying with carrier agent also showed reasonable quality.

  8. Fatty acid composition, anti-inflammatory and analgesic activities of Hibiscus sabdariffa Linn. seeds

    Directory of Open Access Journals (Sweden)

    Sumaia Awad Elkariem Ali

    2014-06-01

    Full Text Available Hibiscus (H. sabdariffa (commonly known as “Karkadeh” in Arabic is widely used in various pharmacological applications in Sudan. The present study was carried out to investigate the anti-inflammatory and analgesic activities of H. sabdariffa seed extracts using rat models. In acute anti-inflammatory models, oral administration of petroleum ether extract of H. sabdariffa seeds inhibited the hind paw edema (p<0.01 which was induced by carrageenan. The petroleum ether extract exhibited significant (p<0.01 inhibition of vascular permeability in rats induced by intraperitoneal injection of acetic acid (0.6%. In cotton pellet granuloma method, the petroleum ether extract of H. sabdariffa seed showed significant inhibition of granuloma. The extract reduced (p<0.001 abdominal constrictions which was induced by injection of acetic acid (0.7%. Analysis of seed oil of H. sabdariffa using Gas Chromatography revealed the presence of three fatty acids; these were linolelaidic acid, arachidic acid, and palmitic acid. In conclusion, H. sabdariffa seeds possess anti-inflammatory and analgesic activities in rat model.

  9. Effect of sour tea (Hibiscus sabdariffa L.) on arterial hypertension: a systematic review and meta-analysis of randomized controlled trials.

    Science.gov (United States)

    Serban, Corina; Sahebkar, Amirhossein; Ursoniu, Sorin; Andrica, Florina; Banach, Maciej

    2015-06-01

    Hibiscus sabdariffa L. is a tropical wild plant rich in organic acids, polyphenols, anthocyanins, polysaccharides, and volatile constituents that are beneficial for the cardiovascular system. Hibiscus sabdariffa beverages are commonly consumed to treat arterial hypertension, yet the evidence from randomized controlled trials (RCTs) has not been fully conclusive. Therefore, we aimed to assess the potential antihypertensive effects of H. sabdariffa through systematic review of literature and meta-analysis of available RCTs. The search included PUBMED, Cochrane Library, Scopus, and EMBASE (up to July 2014) to identify RCTs investigating the efficacy of H. sabdariffa supplementation on SBP and DBP values. Two independent reviewers extracted data on the study characteristics, methods, and outcomes. Quantitative data synthesis and meta-regression were performed using a fixed-effect model, and sensitivity analysis using leave-one-out method. Five RCTs (comprising seven treatment arms) were selected for the meta-analysis. In total, 390 participants were randomized, of whom 225 were allocated to the H. sabdariffa supplementation group and 165 to the control group in the selected studies. Fixed-effect meta-regression indicated a significant effect of H. sabdariffa supplementation in lowering both SBP (weighed mean difference -7.58 mmHg, 95% confidence interval -9.69 to -5.46, P < 0.00001) and DBP (weighed mean difference -3.53 mmHg, 95% confidence interval -5.16 to -1.89, P < 0.0001). These effects were inversely associated with baseline BP values, and were robust in sensitivity analyses. This meta-analysis of RCTs showed a significant effect of H. sabdariffa in lowering both SBP and DBP. Further well designed trials are necessary to validate these results.

  10. Tracking the Flow of Resources in Electronic Waste - The Case of End-of-Life Computer Hard Disk Drives.

    Science.gov (United States)

    Habib, Komal; Parajuly, Keshav; Wenzel, Henrik

    2015-10-20

    Recovery of resources, in particular, metals, from waste flows is widely seen as a prioritized option to reduce their potential supply constraints in the future. The current waste electrical and electronic equipment (WEEE) treatment system is more focused on bulk metals, where the recycling rate of specialty metals, such as rare earths, is negligible compared to their increasing use in modern products, such as electronics. This study investigates the challenges in recovering these resources in the existing WEEE treatment system. It is illustrated by following the material flows of resources in a conventional WEEE treatment plant in Denmark. Computer hard disk drives (HDDs) containing neodymium-iron-boron (NdFeB) magnets were selected as the case product for this experiment. The resulting output fractions were tracked until their final treatment in order to estimate the recovery potential of rare earth elements (REEs) and other resources contained in HDDs. The results further show that out of the 244 kg of HDDs treated, 212 kg comprising mainly of aluminum and steel can be finally recovered from the metallurgic process. The results further demonstrate the complete loss of REEs in the existing shredding-based WEEE treatment processes. Dismantling and separate processing of NdFeB magnets from their end-use products can be a more preferred option over shredding. However, it remains a technological and logistic challenge for the existing system.

  11. Preliminary X-ray Data Analysis of Crystalline Hibiscus Chlorotic Ringspot Virus

    Energy Technology Data Exchange (ETDEWEB)

    Cheng, A.; Speir, J; Yuan, Y; Johnson, J; Wong, S

    2009-01-01

    Hibiscus chlorotic ringspot virus (HCRSV) is a positive-sense monopartite single-stranded RNA virus that belongs to the Carmovirus genus of the Tombusviridae family, which includes carnation mottle virus (CarMV). The HCRSV virion has a 30 nm diameter icosahedral capsid with T = 3 quasi-symmetry containing 180 copies of a 38 kDa coat protein (CP) and encapsidates a full-length 3.9 kb genomic RNA. Authentic virus was harvested from infected host kenaf leaves and was purified by saturated ammonium sulfate precipitation, sucrose density-gradient centrifugation and anion-exchange chromatography. Virus crystals were grown in multiple conditions; one of the crystals diffracted to 3Synchrotron .2 A resolution and allowed the collection of a partial data set. The crystal belonged to space group R32, with unit-cell parameters a = b = 336.4, c = 798.5 . Packing considerations and rotation-function analysis determined that there were three particles per unit cell, all of which have the same orientation and fixed positions, and resulted in tenfold noncrystallography symmetry for real-space averaging. The crystals used for the structure determination of southern bean mosaic virus (SBMV) have nearly identical characteristics. Together, these findings will greatly aid the high-resolution structure determination of HCRSV.

  12. The Protective Efficacy Of Extract Of Hibiscus Sabdariffa (Karkade) Calyces Against Alcohol Toxicity In Male Albino Rats

    International Nuclear Information System (INIS)

    Ali, E.A.; Ali, E.A.; Shahen, E.M.; El Madawy, S.A.

    2013-01-01

    Hibiscus sabdariffa (HS), Malvacea family, is a medicinal plant with a worldwide fame. Its benefit effect on some physiological parameters as blood picture, blood pressure, fasting blood sugar, lipid profile, liver and kidney functions, electrolytes and antioxidant capacity is mentioned in several recent studies. The purpose of this study was to assess the efficacy of this plant in protecting from alcohol toxicity in rats. Thirty two adult male albino rats were divided into four equal groups: group 1 received water orally for 30 days, group 2 received ethanol (5 ml/kg/day) for 30 days, both group 3 and group 4 received Hibiscus sabdariffa (100 mg/kg/day) orally for 30 days and then group 4 received ethanol (5 ml/kg/day) orally for another 30 days. Serum hepatic markers (aspartate and alanine minotransferases; AST and ALT), alkaline phosphatase (ALP) and gamma glutamyl transferase (GGT) were increased significantly by alcohol abuse with no observed improvement in treatment with HS. Significant reduction in total protein and albumin was observed in alcohol abuse which improved with HS treatment and showed significant increase as compared with both control and alcohol treated groups. Serum kidney markers (urea, creatinine and uric acid) were increased in alcohol abuse and only creatinine and uric acid nearly returned to normal levels with HS treatment while urea level remains high. Serum glucose was increased significantly in alcohol abuse and significantly decreased in group 3 (HS treated) and group 4 (HS + ethanol). Serum total cholesterol, triglycerides, high density lipoprotein-cholesterol (HDL-C), low density lipoprotein-cholesterol (LDL-C) and atherogenic index were increased significantly while HDL-C was significantly reduced in alcohol abuse. HS treatment resulted in significant increase in HDL-C and therefore decreased atherogenic index in both group 3 and group 4 which indicated protective effect of HS for coronary heart diseases. These results lead to the

  13. Gene flow and population subdivision in a pantropical plant with sea-drifted seeds Hibiscus tiliaceus and its allied species: evidence from microsatellite analyses.

    Science.gov (United States)

    Takayama, Koji; Tateishi, Yoichi; Murata, Jin; Kajita, Tadashi

    2008-06-01

    The genetic differentiation and structure of Hibiscus tiliaceus, a pantropical plant with sea-drifted seeds, and four allied species were studied using six microsatellite markers. A low level of genetic differentiation was observed among H. tiliaceus populations in the Pacific and Indian Ocean regions, similar to the results of a previous chloroplast DNA (cpDNA) study. Frequent gene flow by long-distance seed dispersal is responsible for species integration of H. tiliaceus in the wide distribution range. On the other hand, highly differentiated populations of H. tiliaceus were detected in West Africa, as well as of Hibiscus pernambucensis in southern Brazil. In the former populations, the African continent may be a geographical barrier that prevents gene flow by sea-drifted seeds. In the latter populations, although there are no known land barriers, the bifurcating South Equatorial Current at the north-eastern horn of Brazil can be a potential barrier to gene flow and may promote the genetic differentiation of these populations. Our results also suggest clear species segregation between H. tiliaceus and H. pernambucensis, which confirms the introgression scenario between these two species that was suggested by a previous cpDNA study. Our results also provide good evidence for recent transatlantic long-distance seed dispersal by sea current. Despite the distinct geographical structure observed in the cpDNA haplotypes, a low level of genetic differentiation was found between Pacific and Atlantic populations of H. pernambucensis, which could be caused by transisthmian gene flow.

  14. Anthocyanin – Rich Red Dye of Hibiscus Sabdariffa Calyx Modulates Cisplatin-induced Nephrotoxicity and Oxidative Stress in Rats

    Science.gov (United States)

    Ademiluyi, Adedayo O.; Oboh, Ganiyu; Agbebi, Oluwaseun J.; Akinyemi, Ayodele J.

    2013-01-01

    This study sought to investigate the protective effect of dietary inclusion of Hibiscus sabdariffa calyx red dye on cisplatin-induced nephrotoxicity and antioxidant status in rats. Adult male rats were randomly divided into four groups of six animals each. Groups I and II were fed basal diet while groups III and IV were fed diets containing 0.5% and 1% of the dye respectively for 20 days prior to cisplatin administration. Nephrotoxicity was induced by a single dose intraperitoneal administration of cisplatin (7 mg/kg b.w) and the experiment was terminated 3 days after. The kidney and plasma were studied for nephrotoxicity and oxidative stress indices. Cisplatin administration caused a significant (Psabdariffa dye could be attributed to its anthocyanin content. PMID:24711761

  15. The protective effect of aqueous extracts of roselle (Hibiscus sabdariffa L. UKMR-2) against red blood cell membrane oxidative stress in rats with streptozotocin-induced diabetes

    OpenAIRE

    Mohamed, Jamaludin; Shing, Saw Wuan; Idris, Muhd Hanis Md; Budin, Siti Balkis; Zainalabidin, Satirah

    2013-01-01

    OBJECTIVES: The aim of this study was to investigate the protective effects of aqueous extracts of roselle (Hibiscus sabdariffa L. UKMR-2) against red blood cell (RBC) membrane oxidative stress in rats with streptozotocin-induced diabetes. METHODS: Forty male Sprague-Dawley rats weighing 230-250 g were randomly divided into four groups (n = 10 rats each): control group (N), roselle-treated control group, diabetic group, and roselle-treated diabetic group. Roselle was administered by force-f...

  16. Flower color changes in three Japanese hibiscus species: further quantitative variation of anthocyanin and flavonols.

    Science.gov (United States)

    Shimokawa, Satoshi; Iwashina, Tsukasa; Murakami, Noriaki

    2015-03-01

    One anthocyanin and four flavonols were detected from the petals of Hibiscus hamabo, H. tiliaceus and H. glaber. They were identified as cyanidin 3-0- sambubioside, gossypetin 3-O-glucuronide-8-O-glucoside, quercetin 7-O-rutinoside, gossypetin 3-O-glucoside and gossypetin 8-O-glucuronide by UV spectra, LC-MS, acid hydrolysis and HPLC. The flavonoid composition was essentially the same among the petals ofH. hamabo, H. tiliaceus and H. glaber, and there was little quantitative variation, except for cyanidin 3-O-sambubioside, the content of which in the petals ofH. tiliaceus and H. glaber was much higher than in that of H. hamabo. Flower colors of H. tiliaceus and H. glaber change from yellow to red, and that of H. hamabo changes from yellow to orange. These changes were caused by contents of anthocyanin and flavonols, which increased after flowering of H. hamabo, H. tiliaceus and H. glaber.

  17. Phenolic Content and Antioxidant Activity of Hibiscus cannabinus L. Seed Extracts after Sequential Solvent Extraction

    Directory of Open Access Journals (Sweden)

    Shahid Iqbal

    2012-10-01

    Full Text Available A sequential solvent extraction scheme was employed for the extraction of antioxidant compounds from kenaf (Hibiscus cannabinus L. seeds. Yield of extracts varied widely among the solvents and was the highest for hexane extract (16.6% based on dry weight basis, while water extract exhibited the highest total phenolic content (18.78 mg GAE/g extract, total flavonoid content (2.49 mg RE/g extract, and antioxidant activities (p < 0.05. DPPH and hydroxyl radical scavenging, β-carotene bleaching, metal chelating activity, ferric thiocyanate and thiobarbituric acid reactive substances assays were employed to comprehensively assess the antioxidant potential of different solvent extracts prepared sequentially. Besides water, methanolic extract also exhibited high retardation towards the formation of hydroperoxides and thiobarbituric acid reactive substances in the total antioxidant activity tests (p < 0.05. As conclusion, water and methanol extracts of kenaf seed may potentially serve as new sources of antioxidants for food and nutraceutical applications.

  18. Antioxidant effects of aqueous extracts from dried calyx of Hibiscus sabdariffa Linn. (Roselle) in vitro using rat low-density lipoprotein (LDL).

    Science.gov (United States)

    Hirunpanich, Vilasinee; Utaipat, Anocha; Morales, Noppawan Phumala; Bunyapraphatsara, Nuntavan; Sato, Hitoshi; Herunsalee, Angkana; Suthisisang, Chuthamanee

    2005-03-01

    The present study quantitatively investigated the antioxidant effects of the aqueous extracts from dried calyx of Hibiscus sabdariffa LINN. (roselle) in vitro using rat low-density lipoprotein (LDL). Formations of the conjugated dienes and thiobarbituric acid reactive substances (TBARs) were monitored as markers of the early and later stages of the oxidation of LDL, respectively. Thus, we demonstrated that the dried calyx extracts of roselle exhibits strong antioxidant activity in Cu(2+)-mediated oxidation of LDL (proselle inhibited TBARs-formation with greater potency than 100 microM of vitamin E. In conclusion, this study provides a quantitative insight into the potent antioxidant effect of roselle in vitro.

  19. EFFECT OF ROSELLE (HIBISCUS SABDARIFFA ON CHANGES IN HEMOGLOBIN LEVELS IN PREGNANT WOMEN WITH ANEMIA TAKING IRON SUPPLEMENT

    Directory of Open Access Journals (Sweden)

    Rif’atun Nisa

    2017-12-01

    Full Text Available Background: Anemia during pregnancy is one of the most common disorders in pregnant women in Indonesia. The Government has made efforts to overcome this problem, however, the rate of anemic mothers remains high. Rosella (Hibiscus Sabdariffa is considered able to increase the hemoglobin levels in pregnant mothers. Objective: To analyze the effect of Rosella flower extract (Hibiscus Sabdariffa on the increase of Hemoglobin level in pregnant women with anemia receiving Fe tablet. Methods: This study was a quasy experiment with pretest-posttest control group design conducted in November - December 2016 in the working area of Tlogosari Wetan Community Health Center. Forty-two participants were selected using accidental sampling, which 21 assigned in the experiment and control group. All samples were pregnant women in the second trimester suffering from anemia and receiving iron tablets. Hemoglobin levels were measured using hematology analyzer in laboratory. Independent t-test and paired t-test were used for data analysis. Results: Paired t-test obtained p-value 0.00 (<0.05, indicated that there was an increase of hemoglobin levels in both experiment and control group. The mean increase of hemoglobin levels in the control group was 0.61 gr and in the experiment group was 1.08. The hemoglobin levels in the experiment group were higher than the levels in the control group. Independent t-test obtained p-value 0.000 (<0.05 indicating that there was a significant difference of mean of hemoglobin levels between the control group and the treatment group. Conclusion: The consumption of rosella extract combined with Fe tablet showed a significant increase of hemoglobin levels compared with the consumption of Fe tablet alone. Therefore, it is suggested for midwife to use the result of this research as a evidence practice through counseling for pregnant mother about utilization of rosella extract that can increase hemoglobin level in pregnant woman with anemia.

  20. Estruturas secretoras de mucilagem em Hibiscus pernambucensis Arruda (Malvaceae): distribuição, caracterização morfoanatômica e histoquímica

    OpenAIRE

    Rocha,Joecildo Francisco; Pimentel,Rafael Ribeiro; Machado,Silvia Rodrigues

    2011-01-01

    No presente trabalho foram estudadas as estruturas secretoras de mucilagem de Hibiscus pernambucensis aos microscópios de luz e de varredura. Conhecida como guaxima-do-mangue e algodão-do-brejo, é espécie nativa encontrada no litoral brasileiro, vegetando áreas de manguezal e restinga, tendo grande importância ecológica nestes ecossistemas. É importante produtora de fibras têxteis e celulose, fornece abundante mucilagem suscetível das mesmas aplicações medicinais de outras malváceas, além da ...

  1. Anthocyanins degradation during storage of Hibiscus sabdariffa extract and evolution of its degradation products.

    Science.gov (United States)

    Sinela, André; Rawat, Nadirah; Mertz, Christian; Achir, Nawel; Fulcrand, Hélène; Dornier, Manuel

    2017-01-01

    Degradation parameters of two main anthocyanins from roselle extract (Hibiscus sabdariffa L.) stored at different temperatures (4-37°C) over 60days were determined. Anthocyanins and some of their degradation products were monitored and quantified using HPLC-MS and DAD. Degradation of anthocyanins followed first-order kinetics and reaction rate constants (k values), which were obtained by non-linear regression, showed that the degradation rate of delphinidin 3-O-sambubioside was higher than that of cyanidin 3-O-sambubioside with k values of 9.2·10(-7)s(-1) and 8.4·10(-7)s(-1) at 37°C respectively. The temperature dependence of the rate of anthocyanin degradation was modeled by the Arrhenius equation. Degradation of delphinidin 3-O-sambubioside (Ea=90kJmol(-1)) tended to be significantly more sensitive to an increase in temperature than cyanidin 3-O-sambubioside (Ea=80kJmol(-1)). Degradation of these anthocyanins formed scission products (gallic and protocatechuic acids respectively) and was accompanied by an increase in polymeric color index. Copyright © 2016 Elsevier Ltd. All rights reserved.

  2. Phytochemistry, antioxidant capacity, total phenolic content and anti-inflammatory activity of Hibiscus sabdariffa leaves.

    Science.gov (United States)

    Zhen, Jing; Villani, Thomas S; Guo, Yue; Qi, Yadong; Chin, Kit; Pan, Min-Hsiung; Ho, Chi-Tang; Simon, James E; Wu, Qingli

    2016-01-01

    A liquid chromatography-mass spectrometry method was developed for the simultaneous separation, and determination of natural compounds including phenolic acids and flavonoids in the leaves of Hibiscus sabdariffa. By analyzing the UV and MS data, and comparison with authenticated standards, 10 polyphenols including neochlorogenic acid, chlorogenic acid, cryptochlorogenic acid, quercetin, kaempferol and their glycosides were identified together with 5-(hydroxymethyl)furfural. Major constituents in the leaves of 25 different populations from worldwide accessions were quantified and compared with each other. The total phenolic content of each accession was determined using Folin-Ciocalteu assay, ranging from 18.98 ± 2.7 to 29.9 ± 0.5 mg GAE/g. Their in vitro antioxidant activities were measured by ABTS radical cation decolorization assay, varying from 17.5 to 152.5 ± 18.8 μmol Trolox/g. After the treatment of H. sabdariffa leaf extract, the reduction of LPS-induced NO production dose-dependently in RAW 264.7 cell indicates the extract's potential anti-inflammatory activity. Copyright © 2015 Elsevier Ltd. All rights reserved.

  3. Changes in protein patterns and in vivo protein synthesis during senescence of hibiscus petals

    International Nuclear Information System (INIS)

    Woodson, W.R.; Handa, A.K.

    1986-01-01

    Changes in proteins associated with senescence of the flowers of Hibiscus rosa-sinensis was studied using SDS-PAGE. Total extractable protein from petals decreased with senescence. Changes were noted in patterns of proteins from aging petals. Flower opening and senescence was associated with appearance and disappearance of several polypeptides. One new polypeptide with an apparent mw of 41 kd was first seen the day of flower opening and increased to over 9% of the total protein content of senescent petal tissue. Protein synthesis during aging was investigated by following uptake and incorporation of 3 H-leucine into TCA-insoluble fraction of petal discs. Protein synthesis, as evidenced by the percent of label incorporated into the TCA-insoluble fraction, was greatest (32%) the day before flower opening. Senescent petal tissue incorporated 4% of label taken up into protein. Proteins were separated by SDS-PAGE and labelled polypeptides identified by fluorography. In presenescent petal tissue, radioactivity was distributed among several major polypeptides. In senescent tissue, much of the radioactivity was concentrated in the 41 kd polypeptide

  4. Using mobile electronic devices to deliver educational resources in developing countries.

    Science.gov (United States)

    Mazal, Jonathan Robert; Ludwig, Rebecca

    2015-01-01

    Developing countries have far fewer trained radiography professionals than developed countries, which exacerbates the limited access to imaging services. The lack of trained radiographers reflects, in part, limited availability of radiographer-specific educational resources. Historically, organizations that provided such resources in the developing world faced challenges related to the limited stock of current materials as well as expenses associated with shipping and delivery. Four mobile electronic devices (MEDs) were loaded with educational content (e-books, PDFs, and digital applications) spanning major radiography topics. The MEDs were distributed to 4 imaging departments in Ghana, India, Nepal, and Nigeria based on evidence of need for radiography-specific resources, as revealed by survey responses. A cost comparison of postal delivery vs digital delivery of educational content was performed. The effectiveness of delivering additional content via Wi-Fi transmission also was evaluated. Feedback was solicited on users' experience with the MEDs as a delivery tool for educational content. An initial average per e-book expense of $30.05, which included the cost of the device, was calculated for the MED delivery method compared with $15.56 for postal delivery of printed materials. The cost of the MED delivery method was reduced to an average of $10.05 for subsequent e-book deliveries. Additional content was successfully delivered via Wi-Fi transmission to all recipients during the 3-month follow-up period. Overall user feedback on the experience was positive, and ideas for enhancing the MED-based method were identified. Using MEDs to deliver radiography-specific educational content appears to be more cost effective than postal delivery of printed materials on a long-term basis. MEDs are more efficient for providing updates to educational materials. Customization of content to department needs, and using projector devices could enhance the usefulness of MEDs for

  5. Effects of different sources of organic waste application on the growth and biomass production of kenaf (hibiscus cannabinus L.)

    International Nuclear Information System (INIS)

    Shahariara, M.S.; Tahsina, S.; Muhammad, S.; Gani, M.N.; Huq, I.

    2012-01-01

    The growth and biomass productivity of kenaf (Hibiscus cannabinus L.) grown with different sources of organic waste viz. sewage sludge, poultry litter, cow dung and rice straw application were observed in a field experiment. Organic wastes were applied at the rate of 5 t/ha and were compared with recommended dose of fertilizers and control. The plants were harvested at 120 days after sowing (at the flowering stage). Different sources of organic wastes had a significant effect (P cow dung>poultry litter > rice straw treatments. Among the four sources of organic wastes, sewage sludge treated plot produced the highest mean biomass of 23.33 t/ha (dry weight basis) which was 14.64% higher than the mean biomass production from control plot. (author)

  6. Effects of different sources of organic waste application on the growth and biomass production of kenaf (hibiscus cannabinus L.)

    International Nuclear Information System (INIS)

    Shahariar, M.S.; Tashin, S.; Gani, N.; Muhammad, S.; Huq, I.

    2012-01-01

    The growth and biomass productivity of kenaf(Hibiscus cannabinus L.) grown with different sources of organic waste viz. sewage sludge, poultry litter, cow dung and rice straw application were observed in a field experiment. Organic wastes were applied at the rate of 5 t/ha and were compared with recommended dose of fertilizers and control. The plants were harvested at 120 days after sowing (at the flowering stage). Different sources of organic wastes had a significant effect (P cow dung>poultry litter> rice straw treatments. Among the four sources of organic wastes, sewage sludge treated plot produced the highest mean biomass of 23.33 t/ha (dry weight basis) which was 14.64% higher than the mean biomass production from control plot. (author)

  7. Success criteria for electronic medical record implementations in low-resource settings: a systematic review.

    Science.gov (United States)

    Fritz, Fleur; Tilahun, Binyam; Dugas, Martin

    2015-03-01

    Electronic medical record (EMR) systems have the potential of supporting clinical work by providing the right information at the right time to the right people and thus make efficient use of resources. This is especially important in low-resource settings where reliable data are also needed to support public health and local supporting organizations. In this systematic literature review, our objectives are to identify and collect literature about success criteria of EMR implementations in low-resource settings and to summarize them into recommendations. Our search strategy relied on PubMed queries and manual bibliography reviews. Studies were included if EMR implementations in low-resource settings were described. The extracted success criteria and measurements were summarized into 7 categories: ethical, financial, functionality, organizational, political, technical, and training. We collected 381 success criteria with 229 measurements from 47 articles out of 223 articles. Most papers were evaluations or lessons learned from African countries, published from 1999 to 2013. Almost half of the EMR systems served a specific disease area like human immunodeficiency virus (HIV). The majority of criteria that were reported dealt with the functionality, followed by organizational issues, and technical infrastructures. Sufficient training and skilled personnel were mentioned in roughly 10%. Political, ethical, and financial considerations did not play a predominant role. More evaluations based on reliable frameworks are needed. Highly reliable data handling methods, human resources and effective project management, as well as technical architecture and infrastructure are all key factors for successful EMR implementation. © The Author 2015. Published by Oxford University Press on behalf of the American Medical Informatics Association. All rights reserved. For Permissions, please email: journals.permissions@oup.com.

  8. Hibiscus sabdariffa L. as a source of nutrients, bioactive compounds and colouring agents.

    Science.gov (United States)

    Jabeur, Inès; Pereira, Eliana; Barros, Lillian; Calhelha, Ricardo C; Soković, Marina; Oliveira, M Beatriz P P; Ferreira, Isabel C F R

    2017-10-01

    The nutritional and bioactive composition of plants have aroused much interest not only among scientists, but also in people's daily lives. Apart from the health benefits, plants are a source of pigments that can be used as natural food colorants. In this work, the nutritional composition of Hibiscus sabdariffa L. was analysed, as well as its bioactive compounds and natural pigments. Glucose (sugar), malic acid (organic acid), α-tocopherol (tocopherol) and linoleic acid (fatty acid) were the major constituents in the corresponding classes. 5-(Hydroxymethyl) furfural was the most abundant non-anthocyanin compound, while delphinidin-3-O-sambubioside was the major anthocyanin both in its hydroethanolic extract and infusion. H. sabdariffa extracts showed antioxidant and antimicrobial activities, highlighting that the hydroethanol extract presents not only lipid peroxidation inhibition capacity, but also bactericidal/fungicidal inhibition ability for all the bacteria and fungi tested. Furthermore, both extracts revealed the absence of toxicity using porcine primary liver cells. The studied plant species was thus not only interesting for nutritional purposes but also for bioactive and colouring applications in food, cosmetic and pharmaceutical industries. Copyright © 2017 Elsevier Ltd. All rights reserved.

  9. Ultrasonic-assisted extraction and in-vitro antioxidant activity of polysaccharide from Hibiscus leaf.

    Science.gov (United States)

    Afshari, Kasra; Samavati, Vahid; Shahidi, Seyed-Ahmad

    2015-03-01

    The effects of ultrasonic power, extraction time, extraction temperature, and the water-to-raw material ratio on extraction yield of crude polysaccharide from the leaf of Hibiscus rosa-sinensis (HRLP) were optimized by statistical analysis using response surface methodology. The response surface methodology (RSM) was used to optimize HRLP extraction yield by implementing the Box-Behnken design (BBD). The experimental data obtained were fitted to a second-order polynomial equation using multiple regression analysis and also analyzed by appropriate statistical methods (ANOVA). Analysis of the results showed that the linear and quadratic terms of these four variables had significant effects. The optimal conditions for the highest extraction yield of HRLP were: ultrasonic power, 93.59 W; extraction time, 25.71 min; extraction temperature, 93.18°C; and the water to raw material ratio, 24.3 mL/g. Under these conditions, the experimental yield was 9.66±0.18%, which is well in close agreement with the value predicted by the model 9.526%. The results demonstrated that HRLP had strong scavenging activities in vitro on DPPH and hydroxyl radicals. Copyright © 2014 Elsevier B.V. All rights reserved.

  10. Germination biology of Hibiscus tridactylites in Australia and the implications for weed management

    Science.gov (United States)

    Chauhan, Bhagirath Singh

    2016-05-01

    Hibiscus tridactylites is a problematic broadleaf weed in many crops in Australia; however, very limited information is available on seed germination biology of Australian populations. Experiments were conducted to evaluate the effect of environmental factors on germination and emergence of H. tridactylites. Germination was stimulated by seed scarification, suggesting the inhibition of germination in this species is mainly due to the hard seed coat. Germination was not affected by light conditions, suggesting that seeds of this species are not photoblastic. Germination was higher at alternating day/night temperatures of 30/20 °C (74%) and 35/25 °C (69%) than at 25/15 °C (63%). Moderate salinity and water stress did not inhibit germination of H. tridactylites. Seedling emergence of H. tridactylites was highest (57%) for the seeds buried at a 2 cm depth in the soil; 18% of seedlings emerged from seeds buried at 8 cm but no seedlings emerged below this depth. Soil inversion by tillage to bury weed seeds below their maximum depth of emergence could serve an important tool for managing H. tridactylites.

  11. Antipyretic activity of the extracts of Hibiscus sabdariffa calyces L. in experimental animals

    Directory of Open Access Journals (Sweden)

    Wantana Reanmongkol

    2007-03-01

    Full Text Available The effects of the extracts from Hibiscus sabdariffa calyces L. (H. sabdariffa on nociceptive response using writhing, hot plate and formalin test in mice and the antipyretic activity in yeast-induced fever in rats, were examined. Anti-inflammatory activity was also investigated on carrageenin-induced paw edema in rats. No acute toxicity was observed in mice after oral administration of the ethanol and aqueous extract of H. sabdariffa calyces at the dose of 15 g/kg. Oral administration of the ethanol extract at the dose of 800 mg/kg significantly decreased the number of contortions and stretchings induced by acetic acid in mice. The aqueous extracts had no effect on this test. Neither the ethanol nor aqueous extract had an effect in the formalin and hot plate tests in mice. The ethanol and the vacuum dried extract of H. sabdariffa calyces (200-800 mg/kg, p.o. decreased the yeast-induced fever in rats. The H. sabdariffa extract had no effect on carrageenininduced paw edema in rats. These results suggest that the ethanol and aqueous extract (vacuum dry of H. sabdariffa calyces possess antipyretic action through mechanisms that are different from that of aspirin.

  12. Preparation and Characterization of Polyelectrolyte Complexes of Hibiscus esculentus (Okra Gum and Chitosan

    Directory of Open Access Journals (Sweden)

    Vivekjot Brar

    2018-01-01

    Full Text Available Polyelectrolyte complexes (PECs of Okra gum (OKG extracted from fruits of Hibiscus esculentus (Malvaceae and chitosan (CH were prepared using ionic gelation technique. The PECs were insoluble and maximum yield was obtained at weight ratio of 7 : 3. The supernatant obtained after extracting PECs was clearly representing complete conversion of polysaccharides into PECs. Complexation was also evaluated by measuring the viscosity of supernatant after precipitation of PECs. The dried PECs were characterized using FTIR, DSC, zeta potential, water uptake, and SEM studies. Thermal analysis of PECs prepared at all ratios (10 : 90, 20 : 80, 30 : 70, 40 : 60, 50 : 50, 60 : 40, 70 : 30, 80 : 20, and 90 : 10; OKG : CH depicted an endothermic peak at approximately 240°C representing cleavage of electrostatic bond between OKG and CH. The optimized ratio (7 : 3 exhibited a zeta potential of −0.434 mV and displayed a porous structure in SEM analysis. These OKG-CH PECs can be further employed as promising carrier for drug delivery.

  13. Efecto de los tratamientos de semilla, la procedencia y el riego en el establecimiento de Hibiscus elatus Effect of seed treatments, provenance and irrigation on the establishment of Hibiscus elatus

    Directory of Open Access Journals (Sweden)

    Laura Montejo Valdés

    2012-09-01

    Full Text Available Se estudió la emergencia y el crecimiento de las plántulas de Hibiscus elatus en condiciones de vivero, en semillas sometidas a tratamientos de escarificación ácida en combinación o no con tratamientos de hidratación parcial en agua. Las semillas se colectaron en cuatro procedencias boscosas de la Reserva de la Biosfera Sierra del Rosario (dos bosques maduros siempreverdes estacionales y dos bosques secundarios y se sometieron a diferentes frecuencias de riego (diario, días alternos y una vez por semana durante su estancia en vivero. Los tratamientos pregerminativos fueron adecuados para incrementar la emergencia y el crecimiento de las plántulas en relación con el control (semillas no tratadas, para todas las procedencias, aunque el efecto positivo dependió del nivel de riego del sustrato. El estrés hídrico afectó de forma significativa el vigor de las plántulas, independientemente del tratamiento utilizado; sin embargo, bajo estas condiciones de siembra, el tratamiento hídrico resultó el más favorable para mejorar el funcionamiento de las plantas en las semillas colectadas en el bosque maduro; mientras que las del bosque secundario tuvieron una mejor habilidad para responder al estrés hídrico con el de escarificación, combinado con la hidratación parcial en agua. Se demostró que el empleo de tratamientos robustecedores a las semillas disminuyó el efecto dañino provocado por la insuficiente humedad del suelo sobre el establecimiento de las plántulas, independientemente del sitio de colecta.The emergence and growth of Hibiscus elatus seedlings under nursery conditions was studied, in seeds subject to acid scarification treatments in combination or not- with partial hydration treatments in water. The seeds were collected in four forest provenances of the Sierra del Rosario Biosphere Reserve (two seasonal evergreen mature forests and two secondary forests and were subject to different irrigation frequencies (daily

  14. Hibiscus Chlorotic Ringspot Virus Coat Protein Is Essential for Cell-to-Cell and Long-Distance Movement but Not for Viral RNA Replication

    Science.gov (United States)

    Niu, Shengniao; Gil-Salas, Francisco M.; Tewary, Sunil Kumar; Samales, Ashwin Kuppusamy; Johnson, John; Swaminathan, Kunchithapadam; Wong, Sek-Man

    2014-01-01

    Hibiscus chlorotic ringspot virus (HCRSV) is a member of the genus Carmovirus in the family Tombusviridae. In order to study its coat protein (CP) functions on virus replication and movement in kenaf (Hibiscus cannabinus L.), two HCRSV mutants, designated as p2590 (A to G) in which the first start codon ATG was replaced with GTG and p2776 (C to G) in which proline 63 was replaced with alanine, were constructed. In vitro transcripts of p2590 (A to G) were able to replicate to a similar level as wild type without CP expression in kenaf protoplasts. However, its cell-to-cell movement was not detected in the inoculated kenaf cotyledons. Structurally the proline 63 in subunit C acts as a kink for β-annulus formation during virion assembly. Progeny of transcripts derived from p2776 (C to G) was able to move from cell-to-cell in inoculated cotyledons but its long-distance movement was not detected. Virions were not observed in partially purified mutant virus samples isolated from 2776 (C to G) inoculated cotyledons. Removal of the N-terminal 77 amino acids of HCRSV CP by trypsin digestion of purified wild type HCRSV virions resulted in only T = 1 empty virus-like particles. Taken together, HCRSV CP is dispensable for viral RNA replication but essential for cell-to-cell movement, and virion is required for the virus systemic movement. The proline 63 is crucial for HCRSV virion assembly in kenaf plants and the N-terminal 77 amino acids including the β-annulus domain is required in T = 3 assembly in vitro. PMID:25402344

  15. Hibiscus chlorotic ringspot virus coat protein is essential for cell-to-cell and long-distance movement but not for viral RNA replication.

    Directory of Open Access Journals (Sweden)

    Shengniao Niu

    Full Text Available Hibiscus chlorotic ringspot virus (HCRSV is a member of the genus Carmovirus in the family Tombusviridae. In order to study its coat protein (CP functions on virus replication and movement in kenaf (Hibiscus cannabinus L., two HCRSV mutants, designated as p2590 (A to G in which the first start codon ATG was replaced with GTG and p2776 (C to G in which proline 63 was replaced with alanine, were constructed. In vitro transcripts of p2590 (A to G were able to replicate to a similar level as wild type without CP expression in kenaf protoplasts. However, its cell-to-cell movement was not detected in the inoculated kenaf cotyledons. Structurally the proline 63 in subunit C acts as a kink for β-annulus formation during virion assembly. Progeny of transcripts derived from p2776 (C to G was able to move from cell-to-cell in inoculated cotyledons but its long-distance movement was not detected. Virions were not observed in partially purified mutant virus samples isolated from 2776 (C to G inoculated cotyledons. Removal of the N-terminal 77 amino acids of HCRSV CP by trypsin digestion of purified wild type HCRSV virions resulted in only T = 1 empty virus-like particles. Taken together, HCRSV CP is dispensable for viral RNA replication but essential for cell-to-cell movement, and virion is required for the virus systemic movement. The proline 63 is crucial for HCRSV virion assembly in kenaf plants and the N-terminal 77 amino acids including the β-annulus domain is required in T = 3 assembly in vitro.

  16. Antibacterial efficiency of the Sudanese Roselle (Hibiscus sabdariffa L.), a famous beverage from Sudanese folk medicine.

    Science.gov (United States)

    Abdallah, Emad Mohamed

    2016-01-01

    Hibiscus sabdariffa L. is a plant native to tropical Africa and intensively cultivated in Sudan. Its calyces are widely consumed with many uses in Sudanese folk medicine. The dried calyces of H. sabdariffa were subjected to soak in 80% v/v methanol to get the methanolic extract, which was tested against five Gram-negative and three Gram-positive referenced bacterial strains using disc diffusion method. Selected bioactive phytochemical compounds were also investigated using qualitative methods. The results of the antibacterial test indicate that the methanol extract of H. sabdariffa calyces contained effective antibacterial agent(s), revealed a considerable zone of inhibition against all tested Gram-negative and Gram-positive bacteria, and it was a competitor to gentamicin and greatly higher than penicillin which showed weak or no effect. The results of current investigation support the folk medicine application of this plant against different microbial ailments and suggest it as a promising source for new antibacterial agents.

  17. Antibacterial efficiency of the Sudanese Roselle (Hibiscus sabdariffa L.), a famous beverage from Sudanese folk medicine

    Science.gov (United States)

    Abdallah, Emad Mohamed

    2016-01-01

    Background: Hibiscus sabdariffa L. is a plant native to tropical Africa and intensively cultivated in Sudan. Its calyces are widely consumed with many uses in Sudanese folk medicine. Materials and Methods: The dried calyces of H. sabdariffa were subjected to soak in 80% v/v methanol to get the methanolic extract, which was tested against five Gram-negative and three Gram-positive referenced bacterial strains using disc diffusion method. Selected bioactive phytochemical compounds were also investigated using qualitative methods. Results: The results of the antibacterial test indicate that the methanol extract of H. sabdariffa calyces contained effective antibacterial agent(s), revealed a considerable zone of inhibition against all tested Gram-negative and Gram-positive bacteria, and it was a competitor to gentamicin and greatly higher than penicillin which showed weak or no effect. Conclusion: The results of current investigation support the folk medicine application of this plant against different microbial ailments and suggest it as a promising source for new antibacterial agents. PMID:27104041

  18. Efek Hepatoprotektif Rosella (Hibiscus sabdariffa L. pada Tikus Model Hepatitis

    Directory of Open Access Journals (Sweden)

    Ike Rostikawati Husen

    2012-06-01

    Full Text Available Hepatitis is initiated by pollutant which caused oxidative stress. Rosella (Hibiscus sabdariffa L. contain flavonoid, an antioxidant which has been used traditionally in treating liver disease. The study aims to define the hepatoprotective effects of fresh rosella calyx ethanol extract (FRCEE on hepatitis model rats with liver malondialdehyde (MDA and serum glutamic piruvic transaminase (SGPT level and hepatocyte morphology damage compared to vitamin E’s effects. The laboratory experimental study has been conducted on August 2009 at Department Pharmacology and Therapy Faculty of Medicine Padjadjaran University/Dr. Hasan Sadikin Hospital in 25 male Wistar rats, divided into 5 groups. Group 1 was negative control, group 2 was positive control (carbon tetrachloride/CCl4-hepatitis model rats, group 3 and 4 were hepatitis model rats that subsequently given 125 mg/kgBW of FRCEE (group 3 and 2.7 IU of vitamin E (group 4 for 8 days; group 5 was given FRCEE. Observations were done 48 hours after CCL4 induction. The results were analyzed by analysis of varian (ANOVA and Tukey. The result showed that FRCEE inhibited increasing of liver MDA and SGPT level significantly different compared to positive control (MDA p=0.00, SGPT p=0.041 but not significantly different to group 4 (MDA p=1.00, SGPT p=0.192. Histological features showed macrovesicular on group 3, microvesicular vacuole on group 2; whereas vitamin E inhibited morphological damage. In conclusion, FRCEE has hepatoprotective effect on hepatitis model rats as antioxidant, but not superior compared to vitamin E.

  19. Electronic Human Resources Management (e-HRM Adoption Studies: Past and Future Research

    Directory of Open Access Journals (Sweden)

    Winarto Winarto

    2018-05-01

    Full Text Available Electronic human resource management (e-HRM systems become more widely used by profit and non-profit organization. However, the field currently lacks sound theoretical frameworks that can be useful in addressing a key issue concerning the implementation of e-HRM systems, in particular to obtain a better understanding of the factors influencing the adoption of e-HRM systems. The objective of this paper is to provide a foundation towards the development of a theoretical framework for the implementation of e-HRM systems and develop a conceptual model that would reflect the nature of e-HRM systems’ adoption through systematic literature review. Adopting Crossan and Apaydin’s procedure of systematic review, this paper investigated 21 empirical papers of electronics human resources management, then categorized them into 4 characteristics which influence the adoption; System and technology characteristics; Organizational characteristics; User/individual characteristics, and Environmental and contextual characteristics. Finally, the e-HRM adoption research framework is drawn and based on the framework; avenues for future research are discussed.   Bahasa Indonesia Abstrak: Manajemen sumber daya manusia elektronik (selanjutnya disebut dengan e-HRM semakin banyak digunakan oleh organisasi profit dan nonprofit. Namun, bidang dan topik ini belum memiliki kerangka teori yang mapan, yang dapat digunakan untuk menganalisis isu-isu terkait penerapan e-HRM, terutama mengenai faktor-faktor yang mempengaruhi adopsi sistem e-HRM. Tujuan penelitian ini adalah untuk memberikan landasan bagi pengembangan kerangka teoritis untuk implementasi sistem e-HRM dan mengembangkan model konseptual yang akan menggambarkan adopsi sistem e-HRM melalui tinjauan literatur sistematis. Mengadopsi prosedur dan metode Crossan dan Apaydin untuk melakukan telaah literatur secara sistematis, paper ini menyelidiki 21 publikasi empiris manajemen sumber daya manusia elektronik dari 2

  20. Effects of Photoperiodism to The Growth Rate of Hibiscus sabdariffa L

    Directory of Open Access Journals (Sweden)

    Wirdhatul Muslihatin

    2014-04-01

    Full Text Available Red roselle (Hibiscus saddariffa L. is a short day plant, this plant is only cultivated in a certain time period. There is a need to manipulate the environment where this plant can grow. The objective of this research was to study the influence of day length tothe relative growth rate (RGR of H.sabdariffaL. Day length treatment was carried out by covering plants by black cover. Day length treatments were given in 8, 9,10, 11 and 12 hours of light exposure. Parameters measured were RGR of height plant, diameter of stem, number, and color of leaves. Harvesting was carried out when the flower crown fell or petals furl (the age of plants reached 3-4 months. The result of this research showed that highest plant was obtained at 10 hours day length (128.20 cm, the largest stem diameter growth rate was obtained at 8 hours (1.79 cm, number of leaves at 10 hours (183.40,and green color of leaves on 12 hours (scale 4. The highest RGR was obtained at 8 hours for all parameters except the height of plant and the color of leaves. Plant height, diameter and number of leaves at 8,9,10, and 11 hours of day length did not show significance difference. This showed that roselle is a short day length plant that grow optimal under 12 hours of day length.

  1. Improving Electronic Resources through Holistic Budgeting

    Science.gov (United States)

    Kusik, James P.; Vargas, Mark A.

    2009-01-01

    To establish a more direct link between its collections and the educational goals of Saint Xavier University, the Byrne Memorial Library has adopted a "holistic" approach to collection development. This article examines how traditional budget practices influenced the library's selection of resources and describes how holistic collection…

  2. Hibiscus chlorotic ringspot virus coat protein upregulates sulfur metabolism genes for enhanced pathogen defense.

    Science.gov (United States)

    Gao, Ruimin; Ng, Florence Kai Lin; Liu, Peng; Wong, Sek-Man

    2012-12-01

    In both Hibiscus chlorotic ringspot virus (HCRSV)-infected and HCRSV coat protein (CP) agroinfiltrated plant leaves, we showed that sulfur metabolism pathway related genes-namely, sulfite oxidase (SO), sulfite reductase, and adenosine 5'-phosphosulfate kinase-were upregulated. It led us to examine a plausible relationship between sulfur-enhanced resistance (SED) and HCRSV infection. We broadened an established method to include different concentrations of sulfur (0S, 1S, 2S, and 3S) to correlate them to symptom development of HCRSV-infected plants. We treated plants with glutathione and its inhibitor to verify the SED effect. Disease resistance was induced through elevated glutathione contents during HCRSV infection. The upregulation of SO was related to suppression of symptom development induced by sulfur treatment. In this study, we established that HCRSV-CP interacts with SO which, in turn, triggers SED and leads to enhanced plant resistance. Thus, we have discovered a new function of SO in the SED pathway. This is the first report to demonstrate that the interaction of a viral protein and host protein trigger SED in plants. It will be interesting if such interaction applies generally to other host-pathogen interactions that will lead to enhanced pathogen defense.

  3. Preharvest, harvest and postharvest factors inherent to roselle (Hibiscus sabdariffa L. crop: A review.

    Directory of Open Access Journals (Sweden)

    Balois-Morales, R.

    2016-01-01

    Full Text Available Hibiscus sabdariffa L. is cultivated to obtain fiber from the stems, oil from the seeds, and to harvest its calyces. Currently, there is a growing interest for the calyces due to studies that have proven their functional feature as the antioxidant effect, alluded to its anthocyanin content, and other benefits that expand their use to the pharmaceutical sector. However, there are no studies focused on relating all the factors involved in the process, from sowing and preharvest management, to harvest, postharvest management, distribution and the sale of dried calyces. The aim of this review is to highlight the factors involved in Roselle management such as variety, crop nutrition, sowing date, irrigation, plagues and diseases incidence and use of phytohormones. To establish the optimal time of calyces harvest, studies have been focused on determining aspects such as size, pH, dry matter content and anthocyanins at different times after blooming. As for the postharvest, the trend marked by studies is to implement improvements in the drying process of calyces and to let producers, distributors and sellers know the quality standards because much of the damage during postharvest is associated with deficiencies in the way calyces are handled.

  4. Hibiscus sabdariffa extract inhibits obesity and fat accumulation, and improves liver steatosis in humans.

    Science.gov (United States)

    Chang, Hong-Chou; Peng, Chiung-Huei; Yeh, Da-Ming; Kao, Erl-Shyh; Wang, Chau-Jong

    2014-04-01

    Obesity is associated with a great diversity of diseases including non-alcoholic fatty liver disease. Our previous report suggested that Hibiscus sabdariffa extracts (HSE) had a metabolic-regulating and liver-protecting potential. In this study, we performed a clinical trial to further confirm the effect of HSE. Subjects with a BMI ≧ 27 and aged 18-65, were randomly divided into control (n = 17) and HSE-treated (n = 19) groups, respectively, for 12 weeks. Our data showed that consumption of HSE reduced body weight, BMI, body fat and the waist-to-hip ratio. Serum free fatty acid (FFA) was lowered by HSE. Anatomic changes revealed that HSE improved the illness of liver steatosis. Ingestion of HSE was well tolerated and there was no adverse effect during the trial. No alteration was found for serum α-amylase and lipase. The clinical effect should mainly be attributed to the polyphenols of HSE, since composition analysis showed that branched chain-amino acids, which is associated with obesity, is not obviously high. In conclusion, consumption of HSE reduced obesity, abdominal fat, serum FFA and improved liver steatosis. HSE could act as an adjuvant for preventing obesity and non-alcoholic fatty liver.

  5. Safety assessment of Hibiscus sabdariffa after maternal exposure on male reproductive parameters in rats.

    Science.gov (United States)

    de Arruda, Aline; Cardoso, Claudia Andrea L; Vieira, Maria do Carmo; Arena, Arielle Cristina

    2016-01-01

    Hibiscus sabdariffa L. (Malvaceae) is a species widely used in folk medicine for the treatment of some disorders. This study evaluated the effects of H. sabdariffa (HS) on the development of the male reproductive tract in rats following in utero exposure. Pregnant rats received 250 or 500 mg/kg of HS extract or vehicle from gestational day 12 until day 21 of lactation. Both doses of HS increased the body weight of male offspring at weaning, without compromising the puberty onset parameters. At puberty, there was a significant increase in the vas deferens absolute weight and a significant reduction in the relative weight of kidney at higher dose. These animals also presented a significant reduction in the sperm number in the caput/corpus of epididymis after exposure to both doses and a reduction in the sperm number in the cauda epididymis for the lower dose. At adulthood, the highest dose significantly reduced the sperm production in relation to controls and both doses provoked a reduction in the relative sperm number in the epididymis without affecting the sperm morphology. These findings demonstrated that maternal exposure to H. sabdariffa can adversely influence the male reproductive system in rats.

  6. Roselle (Hibiscus sabdariffa) seed oil is a rich source of gamma-tocopherol.

    Science.gov (United States)

    Mohamed, R; Fernández, J; Pineda, M; Aguilar, M

    2007-04-01

    The antioxidant potential of roselle (Hibiscus sabdariffa L.) extracts was studied. Different plant organs, including seeds, stems, leaves, and sepals, were analyzed with respect to their water-soluble antioxidant capacity, lipid-soluble antioxidant capacity, and tocopherol content, revealing that roselle seeds are a good source of lipid-soluble antioxidants, particularly gamma-tocopherol. Roselle seed oil was extracted and characterized, and its physicochemical parameters are summarized: acidity, 2.24%; peroxide index, 8.63 meq/kg; extinction coefficients at 232 (k(232)) and 270 nm (k(270)), 3.19 and 1.46, respectively; oxidative stability, 15.53 h; refractive index, 1.477; density, 0.92 kg/L; and viscosity, 15.9 cP. Roselle seed oil belongs to the linoleic/oleic category, its most abundant fatty acids being C18:2 (40.1%), C18:1 (28%), C16:0 (20%), C18:0 (5.3%), and C19:1 (1.7%). Sterols include beta-sitosterol (71.9%), campesterol (13.6%), Delta-5-avenasterol (5.9%), cholesterol (1.35%), and clerosterol (0.6%). Total tocopherols were detected at an average concentration of 2000 mg/kg, including alpha-tocopherol (25%), gamma-tocopherol (74.5%), and delta-tocopherol (0.5%). The global characteristics of roselle seed oil suggest that it could have important industrial applications, adding to the traditional use of roselle sepals in the elaboration of karkade tea.

  7. Clinician‐selected Electronic Information Resources do not Guarantee Accuracy in Answering Primary Care Physicians’ Information Needs. A review of: McKibbon, K. Ann, and Douglas B. Fridsma. “Effectiveness of Clinician‐selected Electronic Information Resources for Answering Primary Care Physicians’ Information Needs.” Journal of the American Medical Informatics Association 13.6 (2006: 653‐9.

    Directory of Open Access Journals (Sweden)

    Martha Ingrid Preddie

    2008-03-01

    Full Text Available Objective – To determine if electronic information resources selected by primary care physicians improve their ability to answer simulated clinical questions.Design – An observational study utilizing hour‐long interviews and think‐aloud protocols.Setting – The offices and clinics of primary care physicians in Canada and the United States.Subjects – Twenty‐five primary care physicians of whom 4 were women, 17 were from Canada, 22 were family physicians,and 24 were board certified.Methods – Participants provided responses to 23 multiple‐choice questions. Each physician then chose two questions and looked for the answers utilizing information resources of their own choice. The search processes, chosen resources and search times were noted. These were analyzed along with data on the accuracy of the answers and certainties related to the answer to each clinical question prior to the search.Main results – Twenty‐three physicians sought answers to 46 simulated clinical questions. Utilizing only electronic information resources, physicians spent a mean of 13.0 (SD 5.5 minutes searching for answers to the questions, an average of 7.3(SD 4.0 minutes for the first question and 5.8 (SD 2.2 minutes to answer the second question. On average, 1.8 resources were utilized per question. Resources that summarized information, such as the Cochrane Database of Systematic Reviews, UpToDate and Clinical Evidence, were favored 39.2% of the time, MEDLINE (Ovid and PubMed 35.7%, and Internet resources including Google 22.6%. Almost 50% of the search and retrieval strategies were keyword‐based, while MeSH, subheadings and limiting were used less frequently. On average, before searching physicians answered 10 of 23 (43.5% questions accurately. For questions that were searched using clinician‐selected electronic resources, 18 (39.1% of the 46 answers were accurate before searching, while 19 (42.1% were accurate after searching. The difference of

  8. Антиоксидантная активность растений вида Hibiscus sabdariffa

    OpenAIRE

    Монтина Ирина Михайловна; Мирошник Елена Геннадьевна

    2016-01-01

    в данной работе была изучена биоморфологическая характеристика растений вида Hibiscus sabdariffa, семейства Malvaceae, рода Hibiscus по содержанию витамина С в листьях и околоплодниках. Использованы традиционные методы лабораторного анализа для определения содержания витамина С. Проанализированы биологические особенности Hibiscus sabdariffa и специфика его выращивания....

  9. Review of material recovery from used electric and electronic equipment-alternative options for resource conservation.

    Science.gov (United States)

    Friege, Henning

    2012-09-01

    For waste from electric and electronic equipment, the WEEE Directive stipulates the separate collection of electric and electronic waste. As to new electric and electronic devices, the Restriction of Hazardous Substances (RoHS) Directive bans the use of certain chemicals dangerous for man and environment. From the implementation of the WEEE directive, many unsolved problems have been documented: poor collection success, emission of dangerous substances during collection and recycling, irretrievable loss of valuable metals among others. As to RoHS, data from the literature show a satisfying success. The problems identified in the process can be reduced to some basic dilemmas at the borders between waste management, product policy and chemical safety. The objectives of the WEEE Directive and the specific targets for use and recycling of appliances are not consistent. There is no focus on scarce resources. Extended producer responsibility is not sufficient to guarantee sustainable waste management. Waste management reaches its limits due to problems of implementation but also due to physical laws. A holistic approach is necessary looking at all branch points and sinks in the stream of used products and waste from electric and electronic equipment. This may be done with respect to the general rules for sustainable management of material streams covering the three dimensions of sustainable policy. The relationships between the players in the field of electric and electronic devices have to be taken into account. Most of the problems identified in the implementation process will not be solved by the current amendment of the WEEE Directive.

  10. Charting a Course through CORAL: Texas A&M University Libraries' Experience Implementing an Open-Source Electronic Resources Management System

    Science.gov (United States)

    Hartnett, Eric; Beh, Eugenia; Resnick, Taryn; Ugaz, Ana; Tabacaru, Simona

    2013-01-01

    In 2010, after two previous unsuccessful attempts at electronic resources management system (ERMS) implementation, Texas A&M University (TAMU) Libraries set out once again to find an ERMS that would fit its needs. After surveying the field, TAMU Libraries selected the University of Notre Dame Hesburgh Libraries-developed, open-source ERMS,…

  11. Designing a model of electronic human resource management’s implementation at the Ministry of Communications and Information Technology

    Directory of Open Access Journals (Sweden)

    Mirali Seyednaghavi

    2017-06-01

    Full Text Available : In the first phase of this study a model for electronic human resource management in government agencies based on new public services was explored by using software MAXQDA, then in the second phase, relationship between the elements of the theory were tested using software Smart PLS2. So the aim of this study is to design a model of electronic human resource management’s implementation at the Ministry of Communications and Information Technology. In this regard, according to Strauss and Corbin’s structured plan, five hypotheses were tested. Quantitative data analysis indicates that the pressures of the policies and global perspectives cause to move toward e-HRM. Among the contextual conditions macro structural mechanisms, considerations of actors, governance considerations have a significant impact on the strategy of new public services and therefore lead to the consequences of its implementation in public organizations. The findings suggest that e-HRM does not have a positive and meaningful impact on new public services, and in our country, although the recent political developments have somehow removed the gap between public policy makers, administrators, and the public, but there is still a long way to go.

  12. Starch-Glycerol Based Edible Film and Effect of Rosella (Hibiscus Sabdariffa Linn Extract and Surimi Dumbo Catfish (Clarias gariepinus Addition on Its Mechanical Properties

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    Endaruji Sedyadi

    2016-10-01

    Full Text Available Effect of Rosella (Hibiscus Sabdariffa Linn Extract and Surimi Dumbo catfish (Clarias gariepinus addition on Starch-Based Edible Film-Glycerol Mechanical Properties has been done. The purpose of this study is to create an active environment-friendly packaging material. Surimi additions are intended to improve the mechanical properties of bioplastics and additions of Rosella extract intended as a bio-indicator of acidity. The method used was Solvent Casting. An amount of surimi and rosella extract varied to obtain the best mechanical properties. The results shows that the addition of surimi and rosella flower extract significantly effect the elongation of Edible films produced up to 27%.

  13. The module of methodical support in system of electronic educational resources as the innovative element of the modern maintenance of formation

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    Ольга Николаевна Крылова

    2009-06-01

    Full Text Available The article introduces some results of research, which were devoted to evaluation of tearches' mobility to introduce innovations in the contents of education. The author considers innovative potential of modules of the methodical support for system of electronic educational resources.

  14. PENGARUH PEMBERIAN SUBKRONIK EKSTRAK KELOPAK BUNGA ROSELLA (Hibiscus Sabdariffa L. TERHADAP KADAR SGPT SGOT DAN ALP

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    Nurkhasanah Nurkhasanah

    2016-11-01

    Full Text Available Roselle (Hibiscus sabdariffa L. has been known as traditional medicinal plants. It needed to evaluate the safety of roselle extract on long-term oral administration. The research aimed to determine the savety of ethanolic extract of roselle calyx. Subchronic toxicity study of ethanolic extract of roselle calyx had been carried out on 60 Sprague Dawleys (SD rats for 28 days. The roselle extract was administered orally every day, with doses of 50,100 and 200 mg/kgBW. There are 2 satellite groups, kept for another 14 days after the treatment in order to detect a delayed occurrence of toxic effect. Satellite group was given extract 200 mg/kgBW for 28 days and followed aquadest treatment for 14 days. At the end of experiment the blood was collected for meansuring SGPT, SGOT and ALP activity. The result showed that treatment of roselle calyx extract had no significant changes in SGPT SGOT, ALP activity. The delayed effect was not also observed. The ethanolic extract of roselle calyx didn’t show toxic effects on the liver on subchronic administration.

  15. Morus alba o Hibiscus rosa-sinensis como sustituto parcial de soya en dietas integrales para conejos

    Directory of Open Access Journals (Sweden)

    P. E. Lara

    2012-01-01

    Full Text Available Los conejos pueden aprovechar los nutrientes contenidos en los forrajes y subproductos agrícolas eficientemente gracias a la fermentación cecal y a la cecotrofía. Los objetivos del presente trabajo fueron: evaluar la tasa de crecimiento y el rendimiento de la canal en conejos alimentados con minibloques de harina de morera (Morus alba o tulipán (Hibiscus rosa-sinensis en sustitución parcial de pasta de soya; y determinar el consumo y digestibilidad de la dieta. Para esto, se utilizaron 18 conejos de 30 días de edad, distribuidos al azar en tres dietas experimentales (n=6, ac (alimento convencional, mbm (minibloque con 30% de morera y, mbt (minibloque con 27% de tulipán, durante nueve semanas. La ganancia diaria y el rendimiento en canal fue mejor (p0.10 en los tres grupos. Es factible sustituir parcialmente la proteína de la soya por harina de hojas de morera o tulipán, aunque presentan una menor respuesta productiva con respecto a la alimentación convencional.

  16. Protective Effect of Hibiscus Sabdariffa on Doxorubicin-induced Cytotoxicity in H9c2 Cardiomyoblast Cells.

    Science.gov (United States)

    Hosseini, Azar; Bakhtiari, Elham; Mousavi, Seyed Hadi

    2017-01-01

    Doxorubicin (DOX) is an effective anticancer drug. But its clinical application is limited, because DOX induces apoptosis in cardiomyocytes and it leads to permanent degenerative cardiomyopathy and heart failure. Recent trainings showed that Hibiscus sabdariffa exhibit pharmacological actions such as potent antioxidant. So, in this study we explored the protective effect of H. sabdariffa extract on doxorubicin-induced cytotoxicity in H9c2 cells. Cell viability was quantified by MTT assay. Apoptotic cells were determined using PI staining of DNA fragmentation by flowcytometry (sub-G1 peak). Cells were cultured with 5 μM DOX for 24 h to create the cell damage. H9c2 cells were pretreated with different concentrations (7.81-500 μg/mL) of H. sabdariffa extract (HSE) for 2 h before DOX treatment in all trials. Pretreatment with HSE increased cell viability at concentration of 31.25-500 μg/mL. Compared to control cells, apoptosis was induced in DOX treated cells after 24 h, (sabdariffa could exert the cardioprotective effects on DOX-induced toxicity partly by antiapoptotic activity.

  17. Impact of Electronic Resources and Usage in Academic Libraries in Ghana: Evidence from Koforidua Polytechnic & All Nations University College, Ghana

    Science.gov (United States)

    Akussah, Maxwell; Asante, Edward; Adu-Sarkodee, Rosemary

    2015-01-01

    The study investigates the relationship between impact of electronic resources and its usage in academic libraries in Ghana: evidence from Koforidua Polytechnic & All Nations University College, Ghana. The study was a quantitative approach using questionnaire to gather data and information. A valid response rate of 58.5% was assumed. SPSS…

  18. O efeito da infusão das flores de Hibiscus pernambucensis Arruda sobre ratas gestantes e lactantes expostas ao campo eletromagnético de ultra-alta-frequência

    OpenAIRE

    Juliana Becker Borba

    2010-01-01

    O Hibiscus pernambucensis Arruda (HpA) é uma planta da família Malvaceae, típica de clima tropical de ecossistemas de mangues. A infusão das flores do HpA apresenta propriedades antioxidantes, decorrentes da vitamina E, flavonóides, quercetina e taninos. Há estudos mostrando que os campos eletromagnéticos de ultra-alta-freqüência (CEMUAF) podem provocar danos à saúde. Estes danos acontecem por indução de estresse oxidativo às células. O presente estudo visa verificar o efeito antioxidante das...

  19. Development and gamma-scintigraphy study of Hibiscus rosasinensis polysaccharide-based microspheres for nasal drug delivery.

    Science.gov (United States)

    Sharma, Nitin; Tyagi, Shanu; Gupta, Satish Kumar; Kulkarni, Giriraj Thirupathirao; Bhatnagar, Aseem; Kumar, Neeraj

    2016-11-01

    This work describes the application of natural plant polysaccharide as pharmaceutical mucoadhesive excipients in delivery systems to reduce the clearance rate through nasal cavity. Novel natural polysaccharide (Hibiscus rosasinensis)-based mucoadhesive microspheres were prepared by using emulsion crosslinking method for the delivery of rizatriptan benzoate (RB) through nasal route. Mucoadhesive microspheres were characterized for different parameters and nasal clearance of technetium-99m ((99m)Tc)-radiolabeled microspheres was determined by using gamma-scintigraphy. Their Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) studies showed that the drug was stable during preparation of microspheres. Aerodynamic diameter of microspheres was in the range 13.23 ± 1.83-33.57 ± 3.69 µm. Change in drug and polysaccharide ratio influenced the mucoadhesion, encapsulation efficiency and in-vitro release property. Scintigraphs taken at regular interval indicate that control solution was cleared rapidly from nasal cavity, whereas microspheres showed slower clearance (p < 0.005) with half-life of 160 min. Natural polysaccharide-based microspheres achieved extended residence by minimizing effect of mucociliary clearance with opportunity of sustained delivery for longer duration.

  20. Analisis Efisiensi Pada Sistem Pengeringan Bunga Rosella (Hibiscus sabdariffa L Menggunakan Alat Pengering Tipe Lemari

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    Refli Safrizal

    2012-10-01

    Full Text Available Efficiency Analysis in Drying System for Rosella (Hibiscus sabdariffa L Using Cabinet Type Dryer ABSTRACT. Drying is one of the most important process in producing a good quality of rosella tea. The study was aimed to evaluate the drying efficiency of rosella tea by using a cabinet dryer. The source of energy for the dryer was from the burning of charcoal. The charcoal was prepared from the coconut shell since it was abundant biomass product. About 7.5 kg of fresh rosella flower was dried for 17 hours. The total of charcoal consumed was 17 kg. The moisture content of rosella flower was reduced from 90 to 12 %. The analysis showed that the total of energy produced from the burning of 17 kg charcoal was 309.4 MJ, whilst the total energy needed to dry the flower was 15,72 MJ. Therefore, the drying efficiency was still low about 4.58%. Further study is recommended to improve the drying efficiency for example by the use of deeper depth of dried products between 2 and 6 cm as well as by improving the system of hot air circulation.