oalib
Search Results: 1 - 10 of 100 matches for " "
All listed articles are free for downloading (OA Articles)
Page 1 /100
Display every page Item
A Cytotaxonomic Study in the Genus Zingiber  [PDF]
NITA ETIKAWATI,AHMAD DWI SETYAWAN
Biodiversitas , 2000,
Abstract: The objective of the study was to know the taxonomic structure of the genus of Zingiber based on cytological characters such as ratio of number, shape and size of chromosome. Zingiber specimens were mainly from Bogor botanical garden. There were seven species studied, Z. amaricans Nor., Z. aromaticum Val., Z. cassumunar Roxb., Z. gramineum Bl., Z. officinale Roxb., Z. ottensii Val. and Z. zerumbet (L.) J.E. Smith. Z. officinale (local name: Jahe) consinsting of 4 varieties, big ginger (jahe gajah), red ginger (jahe merah), small ginger (jahe emprit) and blue-dark browny ginger (jahe wulung). Species identification was based on the literature such as of Backer and Bakhuizen van den Brink (1968), Holttum (1950), and Burkill (1935). Semi permanent squash method using acetoorcein dye was used to prepare the sample (Darnaedi, 1991; Okada, 1981; Robert and Short, 1979). The results of the study indicate that the number of chromosomes of all species studied were the same, 2n=32. The length size of the first chromosome pair was about 2 m. The shape of the chromosomes was mostly metacentric. Length and shape of each pair of chromosomes were hard to be determined accurately using this method, so that the chromosomal karyotype map unable to be constructed in this study. Giemsa C-banding method might be used to solve the problems.
A study of the alkaloids in Cephalotaxus and their bearing on the chemotaxonomic problems of the genus
三尖杉属植物的生物碱研究及其化学分类问题

Chu Tai-Ping,
朱太平

中国科学院研究生院学报 , 1979,
Abstract: The family Cephalotaxaceae contains so far known only 1 genus with 8 species and possibly 2-3 varieties mostly native in China. In recent years, some ester alkaloids of Cephalotaxus have been shown significant activity in a variety of experimental leukemia systems. 6 species (including varieties) of the genus have been investigated for their alkaloids. The detected alkaloids in Cephalotaxaceous plants, from the chemotaxonomic point of view, may be of some significance to the plant systemstics. Our present study has indicated that: (1) The species C. sinensis and C. fortunei (C. oliveri ?) are chemically considered to be more primitive than others, while C. harringtonia, C. hainanensis and C. wilsoniana (including C. mannii?) seem to be derived. (2) Chemical evidence has suggested that the genus Cephalotaxus be accorded a family rank. (3) On the basis of morphology, anatomy, embryogeny, geographical distribution etc., the recent findings in the chemistry of Cephalotaxaceae support the inclusion of Cephalotaxaceae, Taxaceae and Podocarpaceae in Taxineae of Coniferales. (4) C. fortunei, C. hainanensis and C. oliveri (C. harringtonia) contain richer ester alkaloids than other species of the genus. C. fortunei which has a wide distribu- tion and great amount in many provinces of China, may prove to be a good new resource for antitumor medicine.
PHYTOCHEMICAL STUDIES OF THE GENUS ZINGIBER FROM FAMILY ZINGIBERACEAE  [PDF]
Kasarkar A. R.,Kulkarni D. K.
International Journal of Research in Ayurveda and Pharmacy , 2011,
Abstract: Phytochemical analysis of three Zingiber species (Zingiberaceae) revealed presence of phenols and phenolic compounds, acicubin, cyanogenic glycosides, flavonoid and lignins leucoanthocyanis, catechol, tannins, quinone, naptho-quinones and coumarin are absence in all the species. The chemical compounds like syringin glycosides, saponin are doubtful in these species.
Chemotaxonomic study on Thymus xtoletanus Ladero and its parental species
José B. Salas,María J. Pérez-Alonso,Trinidad R. Téllez,Francisco M. Vázquez Pardo
Acta Societatis Botanicorum Poloniae , 2010, DOI: 10.5586/asbp.2010.017
Abstract: We analysed the essential oils of cultivated material of Thymus xtoletanus Ladero and its parents, Th. mastichina (L.) L. and Th. villosus subsp. lusitanicus (Boiss.) Coutinho, with seeds from the same locality in the centre of the Iberian Peninsula. The essential oil of Th. xtoletanus, which had not been analyzed previously, presented 1,8-cineole as the major component (25.5%), as was also the case for Th. mastichina (76.1%). Other components with a major presence in Th. xtoletanus and Th. villosus subsp. lusitanicus were [(Z)-β-ocimene (8.1%); camphor (4.5%); sabinene (3.2%); α-pinene (2.8%)], and [(Z)-β-ocimene (4.1%), camphor (9.8%), sabinene (2.8%), α-pinene (7.1%)], respectively. However, in the hybrid the components β-phelandrene (14.5%), limonene (6.9%), (E)-γ-bisabolene (3.5%), and viridiflorol (3.3%) stood out, inter alia, whereas their presence in the parents was limited. The study confirms the hybrid origin of Th. xtoletanus as intermediate between Th. mastichina and Th. villosus subsp. lusitanicus.
Anti-pyretic and Analgesic Activity of Zingiber zerumbet  [PDF]
M.N. Somchit,M.H.N. Shukriyah,A.A. Bustamam,A. Zuraini
International Journal of Pharmacology , 2005,
Abstract: The objective of the present study was to evaluate the anti-pyretic and analgesic activities of aqueous and ethanol extracts of Zingiber zerumbet rhizomes. The anti-pyretic activity of Zingiber zerumbet (25, 50 and 100 mg kg-1) was studied in Brewer`s yeast-induced pyrexia in rats. The analgesic activity of Zingiber zerumbet (10, 25, 50 and 100 mg kg-1) was studied using acetic acid-induced writhing in mice. Both aqueous and ethanol extracts of Zingiber zerumbet showed significant anti-pyretic activities in Brewer`s yeast-induced pyrexia in rats throughout the observation period of 8 h. The ethanol extract of the rhizomes of Zingiber zerumbet however significantly decreased the writhing movements in mice in acetic acid-induced writhing test. In conclusion, rhizomes Zingiber zerumbet have both analgesic and anti-pyretic activities.
Chemotaxonomic Study of Rhododendron
杜鹃属植物的化学分类学研究

Hu Mei,Xiao Pei-Gen,
胡梅
,肖培根

中国科学院研究生院学报 , 1992,
Abstract: Analysis of 16 flavonoids and 3 other phenols in 177 samples of the genus Rhododendron was carried out by HPTLC silica gel plate-stepwise development and polyamide thin layer. The result reveals that the presence of monoglycosides of quercetin is a general character of flavonoids in the Chinese rhododendrons; some taxa are characterized by presence or absence of certain glycosides; although myricetin, and gossypetin are generally rare in this genus, they are concentrated in some taxa, and therefore they are valuable in chemotaxonomy. The significance of quantitative and semi-quantitative assessment of chem-ical characters for chemotaxonomy of Rhododendron is also discussed.
Chemistry and Biological Activity of Condamineeae Tribe: A Chemotaxonomic Contribution of Rubiaceae Family  [PDF]
Vinicius F. Moreira, Ivo J. C. Vieira, Raimundo Braz-Filho
American Journal of Plant Sciences (AJPS) , 2015, DOI: 10.4236/ajps.2015.616264
Abstract: This study is a review of the Condamineeae tribe, through the acquisition of data from phytochemical studies and evaluation of genera activities that constitute the tribe, in order to contribute to chemotaxonomic classification of this tribe in the Rubiaceae family. This review also states the scarcity of phytochemical investigations of several genera and consequently a lot of species of family.
A comparative study of Curcuma zedoaria and Zingiber zerumbet plantlet production using different micropropagation systems
C Stanly, A Bhatt, CL Keng
African Journal of Biotechnology , 2010,
Abstract: Curcuma zedoaria and Zingiber zerumbet plantlets could be micropropagated via induction of multiple shoots from in vitro shoot explants using different culture systems such as the agar-gelled medium cultures, shake flask system and temporary immersion system (TIS). The immersion period in TIS did not influence shoot multiplication rates of both species. However, proliferation medium (MS plus 0.5mg/L BA and 0.5 mg/L IBA) supplemented with different sucrose concentration affected the production of multiple shoots but did not affect the fresh and dried shoot biomass for both species when using TIS. The TIS was able to eliminate hyperhydricity problem encountered when using the shake flask system. However, all the in vitro plantlets of both species produced by the three culture systems survived and grew normally with no morphological changes after acclimatization. This study indicated that TIS was the best choice of in vitro propagation technique for production of normal C. zedoaria and Z. zerumbet plantlets.
The Effects of Methanolic Extracts of Ginger (Zingiber officinale) on Human Sperm Parameters; An in vitro Study  [PDF]
S.G.A. Jorsaraei,Y.R. Yousefnia Pasha,M. Zainalzadeh,A.A. Moghadamnia
Pakistan Journal of Biological Sciences , 2008,
Abstract: This study was conducted on Zingiber officinale or ginger on motility, grading and morphological aspects of human sperm. Thirty human semen samples were obtained from the local hospital. The samples were swim up by Ham`s F10. The samples (0.9 mL) were treated by 0.1 mL of ginger methanolic extracts (0.1, 0.2, 0.4 and 0.6% concentration). Sperm motility, grading and morphology parameters were assessed using light microscope at 0, 2, 4, 8 and 24 h after treatment. Dose and time-dependent decreases in motility accompanied by concomitant decrease in grading 3 and 4 were noticed. Morphologic profiles of the sperms were changed under different doses of ginger on the basis of time of assess. These data indicate that some exhibits a lower percentage of motility and grading when methanolic ginger is added to semen fluid. According to the results it would be concluded that ginger can induce the toxic effects on sperm parameters.
NUMERICAL CHEMOTAXONOMIC STUDY ON RHODOTORULA RUBRA
深红酵母的化学数值分类学研究

Dan Hanbin,Zhou Yuliang,
但汉斌
,周与良

菌物学报 , 1997,
Abstract: Research of Numerical Chemotaxony was carried out by using thePyGC data on 29 strains of Rhodotorula rubra. Numerical taxonomic techniques consist of Q -type Hierachical Cluster, Principal Component Analysis & Q -factor Analy-sis. The results showed that no matter what kind of numerical taxonomic techniqueswere used, the same taxonomic result can be obtained' Among them, Q-factor Analy-sis gave the best result. In this study, 29 strains of Rh. rubra were clustered into 4taxonomically different groups. Considering the obvious taxonomic specificity of strainNKR111, the author suggests that it should be seperated out from Rh. rubra and re-tained its original name as Rh. pilimanae.
Page 1 /100
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.