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Caracteriza??o tecnológica de espécies liberianas para o estabelecimento de métodos de análise quantitativa de fibras
Azzini, Anisio;Salgado, Antonio Luiz de Barros;Benatti Junior, Romeu;Costa, Antonio Alberto;
Bragantia , 1993, DOI: 10.1590/S0006-87051993000100004
Abstract: the technological characteristics of five bast plants were determined mainly to establish a new methodology for textile and cellulosic fibers determinations. the studied species (crotalaria juncea, hibiscus cannabinus, corchorus capsularis, urena lobatta and boehmeria nivea) were collected in 1987, from experiments carried out at the experiment center of campinas, and experiment station of pariquera-a?u, instituto agron?mico, state of s?o paulo, brazil. the results showed technological differences among species. the crotalaria stalks with the lowest bast contents (19.65%), presented the highest value for the total cellulosic fibers (54.84%) obtained from the bast and woody fraction of the stalk. the bast content for other species varied from 30.74 to 41.13% and the total fibers from 39.46 to 48.38%. the methods of analysis utilized and described in this paper, represent a new methodology for the quantitative determination of textile and cellulosic fibers.
ANTHELMINTIC ACTIVITY OF HIBISCUS CANNABINUS LEAF EXTRACT  [PDF]
Kota Chaitanya Sravanthi,Manthri Sarvani,Sidagonde Srilakshmi
International Journal of Research in Ayurveda and Pharmacy , 2011,
Abstract: The aim of the present study was to investigate the anthelmintic activity of Hibiscus cannabinus leaf extract using adult earthworm, Pheritima posthuma. The methanolic extract of the crude drug at concentrations of 10mg/ml, 20mg/ml, 30mg/ml, 40mg/ml were tested which involve determination of paralysis time and death time. Albendazole was used as standard and it was found that the concentrated methanolic extract (with no traces of solvent) of the Hibiscus cannabinus leaves which is used as food in many parts of the world, showed a better anthelminthic activity in comparison with the standard.
Mass Transfer and Solubility of Hibiscus cannabinus L. Seed Oil in Supercritical Carbon Dioxide
I.S. Adeib,I. Norhuda,R.N. Roslina,M.S. Ruzitah
Journal of Applied Sciences , 2010,
Abstract: Solubility of Hibiscus cannabinus L. seed (particle size 400 μm) oil in supercritical carbon dioxide was determined at pressure of 34.47-48.26 MPa, temperature of 50-80°C and constant flow rate of 5 mL min-1. It was found that the solubility of Hibiscus cannabinus L. in supercritical carbon dioxide increased with the increased of temperature. The extraction yield increased with increased in temperature and pressure. The maximum yield was 8.66% at 48.26 MPa and 80°C for 40 min of extraction. The mass transfer coefficients for Hibiscus cannabinus L. oil was found to be 0.0072 sec-1 at 48.26 MPa and 80°C.
Fitomassa e acúmulo de nitrogênio, em espécies vegetais de cobertura do solo para um Latossolo Vermelho distroférrico de Cerrado = Biomass and nitrogen accumulation in cover crops species used in Brazilian Cerrado
Edicarlos Damacena de Souza,Marco Aurélio Carbone Carneiro,Vera Lúcia Banys
Acta Scientiarum : Agronomy , 2008,
Abstract: Espécies vegetais com alta produ o de fitomassa s o de fundamentalimportancia para o desenvolvimento sustentável do plantio direto no cerrado. Objetivou-se avaliar a produ o de fitomassa e o acúmulo de nitrogênio em 17 espécies vegetais em um Latossolo Vermelho distroférrico da regi o do Cerrado. O trabalho foi realizado no campoexperimental da Universidade Federal de Goiás, localizado no Centro de Ciências Agrárias e Biológicas no Campus de Jataí – Estado de Goiás. O delineamento experimental adotado foi o de blocos ao acaso, com cinco repeti es. Foram utilizadas as espécies: Aveia pretacomum, Aveia preta IAPAR61, Braquiaria brizantha, Braquiaria decumbens, Capim-pé-degalinha, Milheto BN2, Milheto BRS 1501, Milheto MT, Crotalaria spectabilis, Crotalaria juncea, Guandu normal, Guandu super N, Girassol selvagem, Kenaf 1, Kenaf 2, Nabo forrageiro e Niger. O milheto BRS 1501 obteve a maior fitomassa entre as gramíneas, a C. spectabilis, entre as leguminosas e o nabo forrageiro, entre as outras famílias. O milheto BRS1501, C. spectabilis e nabo forrageiro também obtiveram o maior acúmulo de N na parte aérea. As espécies nabo forrageiro, kenaf 1 e milheto BRS 1501 s o as mais recomendadas como cobertura do solo para a regi o do cerrado goiano. Plant species that have high biomass production are of fundamentalimportance to the sustainable development of no-tillage systems in the cerrado region. This experiment had the objective of evaluating the biomass production and nitrogen accumulation in 17 plant species in a Oxisol of the cerrado region. This experiment was conducted in an experimental field of the Federal University of Goiás, located in the Agricultural and Biological Cientific Center of Jataí - State of Goiás. The experimental layout was a randomized block with 5 replicates. The following species were used: two species of Avena strigosa, Brachiaria brizantha, Brachiaria decumbens, Eleusine indica, three species of Pennicetum americanum, Crotalaria spectabilis, Crotalaria juncea, two species of Cajanus cajan,Helianthus sp (savage), two species of Hibiscus cannabinus, Raphanus sativus and Guizotia abyssinica. Among the grasses, BRS 1501 millet presented the highest biomass production; among the legumes C. spectablis showed the same behavior; and Raphanus sativus for theother families. These three species also presented higher values for N accumulation in the shoots. The species Raphanus sativus, Hibiscus cannabinus 1 and BRS 1501 millet are the ones recommended for cover crops in cerrado soils in the Goiás cerrado region.
Haematinic activity of Hibiscus Cannabinus
Gabriel A Agbor, Julius E Oben, Jeanne Y Ngogang
African Journal of Biotechnology , 2005,
Abstract: 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 indices of anaemia. The mean cell haemoglobin, mean cell volume and mean cell haemoglobin concentration were calculated accordingly. Phenylhydrazine induced a significant decrease (P<0.05) in the blood parameters indicating anaemia and also resulted to significant increase (P<0.05) in the mean cell haemoglobin, mean cell volume values, which are indicators of macrocytosis. Leaf extract of H. cannabinus induced a significant (P<0.05) increase in the red blood cell count, haemoglobin concentration, and pack cell volume which had been originally decreased by phenylhydrazine administration within one week of treatment. The presence of macrocytosis turn towards normal as the animals recovered from anaemic condition. The results obtained suggested that H. cannabinus leaves may have haematinic properties.
Response of Crotalaria juncea to nickel exposure
Cardoso, Patrícia Felippe;Grat?o, Priscila Lupino;Gomes-Junior, Rui Alberto;Medici, Leonardo Oliveira;Azevedo, Ricardo Antunes;
Brazilian Journal of Plant Physiology , 2005, DOI: 10.1590/S1677-04202005000200010
Abstract: the response of crotalaria juncea seedlings to nickel (ni) was investigated. ni was shown to accumulate mainly in the root system, with little being translocated to the shoots. catalase (cat) and glutathione reductase (gr) responses to ni were also analyzed. cat activity did not exhibit a clear trend in response to ni exposure, whereas gr activity appeared to respond to the stress induced by ni. the results suggest that in c. juncea gr participates in the detoxification of ni-induced reactive oxygen species via the glutathione-ascorbate cycle.
Inheritance of characters in kenaf (Hibiscus cannabinus)
OA Falusi
African Journal of Biotechnology , 2008,
Abstract: This investigation was carried out to study the inheritance pattern in intraspecific crosses involving two local varieties of Hibiscus cannabinus L. One variety has pink flowers and resistance to root knot nematode, while the other variety has light yellow flowers but susceptible to root knot nematode. Results show that the inheritance of pink flowers and resistance to root knot nematode was controlled by two independently assorting genes with both dominant alleles ‘P’ and ‘R’ producing plants having pink flowers and resistant to root knot nematode, while their recessive alleles ‘p’ and ‘r’ produced plants having light-yellow flowers and susceptible to root knot nematode, respectively.
In vitro study on inhibition of glycosylation of methanolic leaf extract of Hibiscus cannabinus
SA James, R Auta, DJ Goje
Science World Journal , 2011,
Abstract: The inhibitory properties of Methanolic leaf extract of Hibiscus cannabinus (Malvaceae family) on glycosylation formation, was investigated in haemoglobin using Gallic acid as Standard. The periodic glycosylation of haemoglobin at varying concentration of glucose shows a decrease in haemoglobin concentration indicating the glycosylation of haemoglobin. While the subsequent administration of Hibiscus cannabinus Methanolic leaf extract inhibit haemoglobin glycosylation, where a concentration of 20 mg/ml of the extract gave a significant inhibition by yielding haemoglobin concentration of 1.877±0.40 ìg/ml for test extract as against 0.032±0.013 ìg/ml for the standard. This suggests that the plant extract inhibits the binding of glucose to hemoglobin, since at higher concentration of glucose the concentration was found to be high.
STUDIES ON HIBISCUS CANNABINUS, HIBISCUS SABDARIFFA, AND CANNABINUS SATIVA PULP TO BE A SUBSTITUTE FOR SOFTWOOD PULP- PART 1: AS-AQ DELIGNIFICATION PROCESS  [PDF]
Dharm Dutt,J. S. Upadhyaya,C. H. Tyagi
BioResources , 2010,
Abstract: 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 comparison of properties AS-AQ pulping processes with soda and kraft pulping processes of H. cannabinus, C. sativa, and H. sabdariffa was made. All the properties were found to be better than soda and kraft pulps except tear index. All of the mechanical strength properties of handsheets of AS-AQ pulp improved except tear index. Therefore, the AS-AQ pulping process can be considered as ideal for manufacturing of paper grades like greaseproof, glassine, and high-quality writing and printing paper.
Sorption Kinetics and Intra Particulate Diffusivity of Crude Oil on Kenaf (Hibiscus cannabinus L.) Plant Parts
I.A. Okoro,D.E. Okwu,U.S. Emeka
Journal of Engineering and Applied Sciences , 2012,
Abstract: The Kinetics of sorption and intarparticute diffusivity of crude oil using kenaf (Hibiscus cannabinus L.) plant parts was studied. The amount of crude oil adsorbed increased with time. The amount of crude oil adsorbed were 11. 86, 9.92, 7.54 and 7.10 mg mL 1 for the roots and stems respectively. The fractional attainment of equilibrium, values showed that the stem parts research equilibrium point before the root parts. This study has showed that the sorption of crude oil on kenaf (Hibiscus cannabinus L.) plant parts is particle diffusion controlled. The rate coefficient for particle diffusion were 0.015 and 0.007 mm-1 for the root parts and stem parts, respectively.
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