ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    facet.materialart.
    Unknown
    Acyclic diterpene alcohols isolated from four algae of Bryopsidophyceae and their toxicity (2021)
    In:  http://aquaticcommons.org/id/eprint/16120 | 12051 | 2015-02-04 13:35:58 | 16120 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-06-28
    Description: Three new acylic diterpenoids belonging to the class of phytol series have been isolated. They were obtained from the ethyl acetate soluble fractions of four siphonaceous green seaweeds, Bryopsis pennata Lamour., Caulerpa taxifolia (Vahl) C. Ag., Codium decorticatum (Woodw.) Howe and Valoniopsis pachynema (Mart.) Børg., collected from Karachi coast of Pakistan. Structures of these compounds were elucidated with the help of spectroscopic methods and confirmed by comparison with the known compounds. Even the known compounds are being reported for the first time from a green algal source. All the compounds were found to display a strong toxicity at all the three concentrations tested in the brine shrimp bioassay.
    Keywords: Biology ; Acylic diterpenoids ; phytols ; toxicity ; brine shrimp bioassay ; Bryopsis ; Caulerpa ; Codium ; Valoniopsis ; Chlorophyta
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 15-24
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 2
    facet.materialart.
    Unknown
    Two new species and two new reports of Ulva L. (Ulvophyceae) from the coast of Karachi, Pakistan (2021)
    In:  http://aquaticcommons.org/id/eprint/16053 | 12051 | 2015-01-26 10:09:23 | 16053 | University of Karachi. Marine Reference Collection Centre
    Details
    Publication Date: 2021-06-26
    Description: Morphology and taxonomy of four species of Ulva i.e. U. anandii Amjad et Shameel sp. nov., U. bifrons Ardre, U. saifullahii Amjad et Shameel sp. nov. and U. taeniata (Setchell) et Gardner were described for the first time from Pakistan. Their anatomy has been investigated in detail and compared with the allied species. A taxonomic comment has been written on U. grandis Saifullah et Nizamuddin.
    Keywords: Biology ; new records ; new species ; distribution records ; plant morphology ; geographical distribution ; taxonomy ; morphology ; sp.nov. ; Ulva taeniata ; Ulva ; marine ; Karachi ; Pakistan
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 5-16
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 3
    facet.materialart.
    Unknown
    Comparative haemagglutinic activity in the species of Caulerpa and Ulva (Chlorophyta) of Karachi coast (2021)
    In:  http://aquaticcommons.org/id/eprint/16091 | 12051 | 2019-06-11 14:54:22 | 16091 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-06-27
    Description: Aquous extracts of 24 species of green seaweeds, 13 of Caulerpa Lamour and 11 of Ulva Linn, were collected from the coastal areas near Karachi, Pakistan and tested for haemagglutination against human erythrocytes of blood groups A,B,AB and O and compared. All the species of Caulerpa and seven of Ulva exhibited a positive activity, the former genus (a member of Bryopsidophyceae) appeared to possess more phycohaemagglutinins than the latter (a member of Ulvophyceae). The haemagglutinic activity proved to be quite helpful in the distinction of various species of both the genera.
    Keywords: Biology ; phycohaemagglutinins ; lectins ; Caulerpa spp. ; Ulva spp. ; Chlorophyta ; coastal areas ; Karachi ; Pakistan
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 113-117
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 4
    facet.materialart.
    Unknown
    Fatty acid composition of three species of Hypnea (Gigartinales, Rhodophyta) from Karachi coast (2021)
    In:  http://aquaticcommons.org/id/eprint/16025 | 12051 | 2015-01-26 09:30:42 | 16025 | University of Karachi. Marine Reference Collection Centre
    Details
    Publication Date: 2021-06-25
    Description: Hypnea musciformis (Wulf.) Lamour., H. pannosa J. Ag. and H. valentiae (Turn.) Mont., collected from the northern Arabian Sea coast of Pakistan, have been investigated for their fatty acid compositions through GC-MS. Palmitic acid was present in largest quantity (55-57%) and oleic was the major (7.6-8.4%) unsaturated fatty acid. Pentacosanoic and hexacosenoic acids are being reported for the first time from any species of Hypnea. The three species differed remarkably due to their habitat ecology.
    Keywords: Biology ; Chemistry ; Fatty acid ; Hypnea spp. ; Rhodophyta ; Karachi ; Pakistan
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 7-10
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 5
    facet.materialart.
    Unknown
    Taxonomic study of brown algae commonly growing on the coast of Karachi, Pakistan (2021)
    In:  http://aquaticcommons.org/id/eprint/16342 | 12051 | 2015-05-13 14:31:49 | 16342 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-07-03
    Description: Fourteen commonly occurring species of marine benthic algae, i.e., Colpomenia sinuosa (Mertens ex Roth) Derbes et Solier, Dictyopteris australis (Sonder) Askenasy, Dictyota dichotoma (Hudson) Lamouroux D. dumosa Børgesen, D. hauckiana Nizamuddin, D. indica Sonder, D. maxima Zanardini, Hincksia mitchelliae (Harvey) Silva, Jolyna laminarioides Guimardes in Guimarâes et al., Padina tetrastromatica Hauck, Sargassum tenerrinum J. Agardh, Spatoglossum variabille Figari et De Notaris, Stoechospermum marginatum (C. Agardh) Kültzing and Stokeyia indica Thivy et Doshi, belonging to all three classes of Phaeophyta, were collected from coastal areas near Karachi, Pakistan and their taxonomy determined. Although all are taxonomically known species, Dictyota dichotoma, D. dumosa, D. hauckiana, D. indica, D. maxima, Jolyna laminarioides, Padina tetrastromatica, Sargassum tenerritnum and Stokeyia indica are described for the first time from the coast of Pakistan.
    Keywords: Biology ; Phaeophyta ; morphology ; anatomy ; reproduction ; ecological notes ; marine algae ; northern Arabian Sea ; Pakistan
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 9-38
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 6
    facet.materialart.
    Unknown
    A taxonomic study of some red algae commonly growing on the coast of Karachi (2021)
    In:  http://aquaticcommons.org/id/eprint/17663 | 11966 | 2015-09-16 11:29:33 | 17663 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-06-26
    Description: Eighteen commonly occurring species of marine benthic red algae, i.e., Asparagopsis taxiformis (Delile) Trevisan, Bangia atropurpurea (Roth) C. Agardh, Centroceras clavulatum (C. Agardh) Montagne, Calliblepharis fimbriata (Greville) Kiitzing, Coelarthrum muelleri (Sonder) B¢rgesen, Cottoniella filamentosa (Howe) B¢rgesen, Gracilariafoliifera (Forsskai) B¢rgesen, Halymenia porphyraeformis (B¢rgesen) Parkinson, Hypnea muscifor:mis (Wulfen) Lamouroux, Hypnea valentiae (Turner) Montagne, Laurencia obtusa (Hudson) Lamouroux, Me!anothamnus somalensis Bomet et Falkenberg, Porphyra vietnamensis Tanaka et Pham-hoang H6, Sarconema filiforme (Sonder) Kylin, Sebdenia flabellata (J. Agardh) Parkinson, Scinaia fascicularis (B¢rgesen) Huisman, Scinaia hatei B¢rgesen, and Solieria robusta (Greville) Kylin were collected from coastal areas near Karachi (Pakistan) and taxonomically investigated. All the investigated seaweeds are taxonomically known species. During this study, Melanothamnus somalensis is reported for the first time from northern Arabian Sea and Asparagopsis taxiformis, Bangia atropurpurea, Cottoniella filamentosa, Gracilaria foliifera, Halymenia porphyraeformis, Melanothamnus somalensis, Sarconema filiforme, Sebdenia flabellata, Scinaia fascicularis, and Solieria robusta are taxonomically described for the first time from the coast of Pakistan.
    Keywords: Biology ; Oceanography ; Rhodophyta ; morphology ; anatomy ; reproduction ; ecological notes ; marine algae ; northern Arabian Sea ; Pakistan
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 113-136
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 7
    facet.materialart.
    Unknown
    Fatty acid composition of more brown seaweeds (Phaeophyta) from the coast of Karachi (2021)
    In:  http://aquaticcommons.org/id/eprint/19137 | 12051 | 2015-12-11 12:11:37 | 19137 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-07-13
    Description: Six species of multicellular, thalloid, brown algae, belonging to five genera of the classes Laminariophyceae and Fucophyceae were collected from the coastal areas of Buleji near Karachi (Pakistan) during October 1997 and February 1998. They were extracted in chloroform: methanol, saponified, subjected to column chromatography (CC, TLC), esterified and analysed for fatty acid (FA) composition initially by gas-liquid-chromatography (GLC) and finally by gas chromatography-mass spectrometry (GC-MS). They displayed only a few SCFAs, PUFAs and substituted FAs, no VLCFA, C22 UFA, CFA, DCFA and monoynoic FA, large amount of CI6:0, very large quantity of C18:1, very small RCCL and FA-diversity, C18 UFAs up to four DBs, C20 UFAs up to three DBs only. They were characterized by the largest amount of C18:1, lowest degree of unsaturation of C20 UFAs, lack of C22 UFAs, the shortest RCCL and the smallest FA-diversity as compared to other phyla.
    Keywords: Biology ; Chemistry ; algae ; Phaeophyta ; Fucophyceae ; Laminariophyceae ; fatty acids ; Pakistan
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 103-108
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 8
    facet.materialart.
    Unknown
    Fatty acid composition of some brown seaweeds (Phaeophyta) from the coast of Karachi (2021)
    In:  http://aquaticcommons.org/id/eprint/19058 | 12051 | 2015-12-11 12:08:04 | 19058 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-07-13
    Description: Ten species of filamentous and multicellular thalloid algae (Phaeophyta) belonging to six genera of the class Dictyophyceae were collected from different seawater habitats of Karachi, Pakistan at the northern boundary of the Arabian Sea during September 1997 and July 1998. They were extracted in chloroform: methanol, saponified, subjected to column chromatography (CC, TLC), esterified and analysed for fatty acid (FA) composition initially by gas-liquid-chromatography (GLC) and finally by gas chromatography-mass spectrometry (GC-MS). Algae of the classes Laminariophyceae and Fucophyceae (Phaeophyta) displayed only a few SCFAs, PUFAs and substituted FAs, no VLCFA, C22 UFA, CFA, DCFA and monoynoic FA, large amount of C16:0, very large quantity of C18:1, very small RCCL and FA-diversity, C18 UFAs up to four DBs, C20 UFAs up to three DBs only. They were characterized by the largest amount of C18:1, lowest degree of unsaturation of C20 UFAs, lack of C22 UFAs, the shortest RCCL and the smallest FA-diversity as compared to other phyla.
    Keywords: Biology ; Chemistry ; fatty acids ; algae ; Dictyophyceae ; Phaeophyta ; Karachi ; Pakistan
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 39-48
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...