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Anka niogon deme

- Saly Sidibe, Harouna Bary (arrangement), Adama Drame (guitar solo), Batass (bass guitar), Harouna Samake ((N'goni), Lamine Camara (electric piano), Mamadou Koita (Djembe), Sidi Coulibaly (drums), Amadou Taore dit Adez (flute), Awa Diabate, Sanata Doumbie (chorus), Ali Landoure

Anka Niogon Deme

- Saly Sidibe, Harouna Bary (arrangement), Adama Drame (guitar solo), Amadou Taore dit Adez (flute), Batoss (bass guitar), Lamine Camara (electric piano), Mamadou Koita (Djembe), Harouna Samake (N'goni), Sidi Coulibaly (drums), Awa Diabate, Sanota Doumbie (chorus), Ali Landoure

Anta Lo

- Vieux Marius Seck (composer, lead singer, rhythm guitar, accoustic guitar, chorus), Racine Ly (solo guitar), Ousmane Wade (keyboard), Youssou Camara (drums), Moussa Traore (percussions), Sam Thiam (tama), Fama Lo (chorus), Samba Laobe Ndiaye (bass guitar, arranger, recorded by), Studio 2000

Application of the Minolta chromameter to the assessment of corticosteroid-induced skin blanching

- Walker, Roderick B, Haigh, John M, Smith, Eric W

Aspects of reproduction in the four-striped field mouse, Rhabdomys pumilio

- Jackson, Claire

  • Authors: Jackson, Claire
  • Date: 2000
  • Subjects: Microtus , Mice , Mice -- Reproduction
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:5637 , http://hdl.handle.net/10962/d1005319 , Microtus , Mice , Mice -- Reproduction
  • Description: Rhabdomys pumilio, in the Eastern Cape of South Africa, does not use short day length as an inhibitory cue for reproductive activity, and, despite previous records indicating that these mice are strictly seasonal in their reproduction, litters have been found during the winters of some years,both in the Eastern Cape and in the Western Cape. This led me to believe that the reproductive activity of Rhabdomys pumilio is more opportunistic and that the cue or cues used to control reproduction are less predictable and, or more variable than the photoperiod cue used by many seasonally reproducing rodents. Two experiments were conducted, investigating the influence of low ambient temperature (15⁰C)and reduced food availability on the reproductive activity of both male and female four striped field mice. Mice were maintained in one of four conditions (food restricted at 15⁰C, food restricted at 26⁰C, ad lib. food at 15⁰C, and ad lib. food at 26⁰C) for 4 (males) and 8 weeks (females)(photoperiod 12L:12D, humidity 40%). Results indicated that the males reduced their reproductive activity slightly when exposed to either low temperature or low food availability and that maximum inhibition of reproduction occurred when mice were exposed to both low temperature and low food availability. However, female reproductive activity was inhibited when exposed to low food availability, irrespective of the temperature. Both sexes of mice showed varying abilities to resist fat loss and, in the males, the size of the fat store had a significant effect on reproduction. This varying ability to resist fat loss could be related to levels of activity and in the females (where activity was quantified), high activity scores were significantly associated with reproductive inhibition. These results support the hypothesis that reproduction in Rhabdomys pumilio is opportunistic and controlled by the availability of energy. I propose that the females will be more sensitive to reproductive inhibition due to their far greater post-fertilization responsibilities, where the reproductive activity of the females is rapidly inhibited by a reduction in food availability, while the males are less readily inhibited by low food availability or low temperature, unless the change in the controlling factors is severe enough, or prolonged, at which stage their reproductive activity will cease. The significance of opportunistic reproduction in the seasonal but unpredictable climate of the study area is discussed.
  • Full Text:
  • Date Issued: 2000

Aspects of the ecology and reproductive biology of the limpet, Helcion pruinosus (Gastropoda : prosobranchia)

- Henninger, Tony Oskar

  • Authors: Henninger, Tony Oskar
  • Date: 2000
  • Subjects: Prosobranchia , Limpets -- Reproduction , Limpets -- Ecology , Prosobranchia -- Ecology
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:5641 , http://hdl.handle.net/10962/d1005323 , Prosobranchia , Limpets -- Reproduction , Limpets -- Ecology , Prosobranchia -- Ecology
  • Description: Helcion pruinosus, the rayed limpet, is found in the midshore region of the intertidal zone, (i.e. the Balanoid zone) of rocky shores, from Saldanha Bay to Sodwana Bay along the coast of South Africa. At Gonubie (32°57'S/25°01'E) this species of limpet was found under boulders, (when not feeding), and could reach average densities of 85/ m². The limpets prefer smooth boulders, avoiding those encrusted by coralline algae or boulders with a rough texture. There was no habitat segregation between adult and juvenile H. pruinosus, i.e. there was no sign of up-shore migration by larger individuals. Males out-numbered females by, on average 1.4 : 1, which was a similar sex ratio to that of the congeneric species, H. pectunculus (Gray, 996). Unlike H. pectunculus, there were no differences in shell lengths between males and females (p = 0.946 at Gonubie, south-east coast and p = 0.961 at Kommetjie, south-west coast; t-test). Shell height could also not be used as a criterion to differentiate between the sexes. The average maximum shell length of H. pruinosus at Gonubie and Kommetjie was 25 mm, but the maximum shell lengths found were 30 mm, (one individual in each case), on both the southeast coast and west coast. Growth occurred most rapidly in the first year of life, with individuals reaching 15 mm after 1 year. In the second year limpet growth slowed to only 7 mm. Sexual maturity was reached at a shell length of between 11 to 14 mm (at an age of 8 months to 1 year). The life-span of H. pruinosus was determined at 2.55 years on the south-east coast and 2.9 years on the south-west coast. Micro-growth bands were produced tidally. Growth occurred allometrically, i.e. shell length increased at a faster rate than shell height. The limpets foraged during low tide, at night, presumably feeding on epilithic algae on the boulders. A second smaller peak of limpet activity was often recorded during the day, when low tide coincided with dawn). More limpets (up to ten times more) were active at spring tides compared to neap tides. Limpet activity was greatest during the spring tides of autumn. During all seasons limpet activity peaked 30 minutes before low water, after which numbers decreased rapidly. All limpets had retreated beneath the boulders before being covered by the flooding tide. It was concluded that the limpets were responding to both endogenous and exogenous cues, but the actual stimulus for retreat could not be determined. The limpets did not return to a fixed scar nor did they return rigidly to a home site. H. pruinosus was found to be gonochoristic. Sexes could be separated, on dissection, according to the colour of their gonads (males had white gonads, whilst that of the females was olive-green). Gonads were present throughout the year in most individuals, i.e. totally spent animals were never observed. Reproductive seasonality was similar in west coast and south-east coast animals. The gonad indices of the west coast limpets were higher, (maximum of 35%), compared to that on the southeast coast, (25%). The animals were probably trickle spawners, with some individuals liberating gametes throughout the year. There was however synchrony in gametogenesis between male and female limpets on both the west coast and south-east coast lines. Gonad indices peaked in the summer months (October to December) with a second minor peak in April/May. These peaks occurred before the release of the gametes in spawning events. The gonad index was lowest in winter, (July). The ovaries were full of mature eggs (oocytes having a diameter of 200 to 250 ~) prior to spawning. The acinal wall thickness had been decreasing prior to spawning. After spawning there was an increase in previtellogenic eggs « 100 μm) in females, and an increase in the acinal wall thickness to indicate spermatogenesis. The two populations are subjected to different environmental conditions and the actual cue for stimulating the release of gametes could not be determined. Finally, a table of differences between H pruinosus and its sister species, H pectunculus was created to show the life-style of H pruinosus.
  • Full Text:
  • Date Issued: 2000

Assessing alternative assessment: students' experiences of the different forms of assessment in a Bachelor of Education course

- Hendricks, Monica

  • Authors: Hendricks, Monica
  • Date: 2000
  • Subjects: Education, Higher -- South Africa -- Evaluation Educational tests and measurements -- South Africa
  • Language: English
  • Type: Thesis , Masters , MEd
  • Identifier: vital:1424 , http://hdl.handle.net/10962/d1003305
  • Description: In this study I examine the current alternative forms of assessment that were employed in the foundation year of the Bachelor of Education course at Rhodes University in 1998. Since assessment is concerned with ascertaining the amount, and kind, of learning that has taken place, it links learning and teaching. As my role in the course was academic development, I was interested in the nature ofthe development that the course promoted, for lecturers and students. My main intention was to gain insight into students' experiences of the assessment practices. To this end I selected six students, photocopied all their academic writing for the year and interviewed them. In addition, to provide a holistic picture of assessment and marking, I interviewed the six lecturers who team-taught the course. The data thus included the course assignments of the six students and an interview with each student as well as with the course lecturers. The findings show that though policy documents advocate alternative forms of assessment, implementing such assessment is a complex matter for both teachers and students.
  • Full Text:
  • Date Issued: 2000

Assessing the potential for biological invasion - the case of Ammophila arenaria in South Africa

- Hertling, Ursula M, Lubke, Roy

  • Authors: Hertling, Ursula M , Lubke, Roy
  • Date: 2000
  • Language: English
  • Type: Article
  • Identifier: vital:6518 , http://hdl.handle.net/10962/d1005947
  • Description: Many plants, especially woody species, introduced into South Africa for ornamental or commercial purposes, have become invasive in a number of habitats. Because of the risk of an invasion of coastal dunes by yet another species, the European dune grass Ammophila arenaria, used as a dune stabilizer, is assessed using lists of attributes of invasive species and invasible ecosystems. It is impossible to predict plant invasions, but both invasive species as well as invaded ecosystems are often characterized by certain attributes which facilitate invasions. Many of the species attributes connected with invasion appear to apply to A. arenaria. Above all, the grass is characterized by ecological tolerance and vigorous rhizomatous reproduction. An important site attribute connected with invasion is an evolutionary history with isolation patterns, which applies to the South African Cape coast. We conclude also on the basis of the overseas experience, that the potential for A. arenaria to become invasive needs urgent investigation in the South African context.
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  • Date Issued: 2000

Assessment of the potential contribution of the Coega industrial development initiative to the Eastern Cape Economy

- Bibby, Ray Russ

  • Authors: Bibby, Ray Russ
  • Date: 2000
  • Subjects: Harbors -- Environmental aspects -- South Africa -- Port Elizabeth , Industrial development projects -- South Africa -- Port Elizabeth
  • Language: English
  • Type: Thesis , Masters , MTech
  • Identifier: vital:10830 , http://hdl.handle.net/10948/20 , Harbors -- Environmental aspects -- South Africa -- Port Elizabeth , Industrial development projects -- South Africa -- Port Elizabeth
  • Description: The research problem addressed in this study was to analyse and report on the development of the Coega Industrial Development Zone as an infrastructure for renewed entrepreneurial activity and profitable management of existing firms in the Eastern Cape. To achieve this objective, a literature study was undertaken to assess the potential benefits achieved at similar industrial development zones around the world and what could be learnt from these developments which will make the Coega Industrial Development Zone workable. The Empirical results obtained, indicate that most local companies are confident that the Coega industrial Development Zone will be beneficial to the region. In conclusion, various recommendations have been made with regard to the findings ascertained in the Empirical Study.
  • Full Text:
  • Date Issued: 2000

Asymmetric α-alkylation reactions

- Klein, Rosalyn

  • Authors: Klein, Rosalyn
  • Date: 2000
  • Subjects: Asymmetric synthesis , Alkylation , Chemical reactions
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:4405 , http://hdl.handle.net/10962/d1006710 , Asymmetric synthesis , Alkylation , Chemical reactions
  • Description: A novel camphor-derived hydroxy ketal 138 has been developed as a crural auxiliary, and used to prepare a series of six carboxylic esters of increasing steric bulk. The α-benzylation of this series of esters was achieved with diastereoselectivities of 59 - 83％ d. e. and in 39 - 48％ material yield. These results compared very favourably with those obtained in earlier studies using a regioisomeric analogue as the chiral auxiliary. Computer.modelling studies of the putative enolate intermediate has provided some insight into the possible mode of electrophilic attack at the α-carbon and the roles of the ketal protecting group and the lithium cation in these asymmetric transformations. In a related investigation, based on earlier work, a camphor-derived imino lactone has provided convenient access to α-alkyl α-amino acids, the imino lactone serving as a masked glycine equivalent. Using straight chain primary alkyl iodides [RI; R = Me, Et, Pr, Bu, CH₃(CH₂)₄ and CH₃(CH₄)₅], alkylation of the potassium enolate of the camphor-derived imino lactone was effected with 54 - 89％ d.e. and in 54 - 87％ material yield. Four novel alkylated derivatives were synthesised using isopropyl iodide, sec-butyl iodide and allyl iodide, the latter reagent resulting in both the monoallylated and diallylated products. While very good diastereoselectivities were achieved (83 - 88％ d. e.) in these reactions, the material yields from reaction with the secondary alkyl iodides were low (31- 35％) due, presumably, to their decreased electrophilicity. Computer modelling studies of the enolate were carried out and support the hypothesis of endo attack by the electrophile on the enolate intermediate. These studies also indicate the possibility of coordination of the postassium cation to the endocyclic ester oxygen, thus effectively anchoring the bulky cation away from the reaction site.
  • Full Text:
  • Date Issued: 2000

Aun Nom De L'Amite

- Didier Sourou Awadi aka DJ Awadi (performer), Amadou Barry aka Doug E Tee or Duggy-Tee (performer), Positive Black Soul (band name aka PBS), MALI K7 S.A. Ali Furka Toure Associe, Bamako

Ayda

- Ndaye Marie Ndiaye (lead vocal), Ndickou Thione, Adji Soda Thioune, Lot Ndiaye (chorus), Tapha Faye (keyboard, arrangements), Papis Diouf (solo guitar), Badou Dieme (bass guitar), Jules Diop (drums), Papu Ndiaye (percussion), Dara Guisse (xalam), Habib Mbengue, Ousmane Ndiaye (additional percussion), Ndiago Ndour, Samassa Records

Ayda

- Ndaye Marie Ndiaye (lead vocal), Ndickou Thione, Adji Soda Thioune, Lot Ndiaye (chorus), Tapha Faye (keyboard, arrangements), Papis Diouf (solo guitar), Badou Dieme (bass guitar), Jules Diop (drums), Papu Ndiaye (percussion), Dara Guisse (xalam), Habib Mbengue, Ousmane Ndiaye (additional percussion), Ndiago Ndour, Samassa Records

Azigbo

- Gnaore Djimi (vocals, creator), Gnaore Djimi The Best (album title), Showbiz

  • Authors: Gnaore Djimi (vocals, creator) , Gnaore Djimi The Best (album title) , Showbiz
  • Date: 2000
  • Subjects: Popular music , Popular music--Africa, West , Africa Cote d'Ivoire Abidjan f-iv
  • Language: French
  • Type: sound recordings , field recordings , sound recording-musical
  • Identifier: http://hdl.handle.net/10962/128902 , vital:36189 , International Library of African Music, Rhodes University, Grahamstown, South Africa , SDC17-03
  • Description: Ivorian popular song in the Polihet style that is based on the traditional sounds, gestures and heritage of Niamboua people who live in the southwest reagion of Cote d'Ivoire. Polihet is performed at funerals, baptisms,weddings with the themes of love, hate, death and peace
  • Full Text: false
  • Date Issued: 2000

Baay Ndongo

- Ma Sane, Do Sagna, Yade (vocals), Toto (guitar), Race, Magx Thiam (keyboards), Galass, Mbaye Joola (percussion), Beuz (drums), Studio 2000

Baayi Aboo

- Fatou Laobe (performer, composer), Mareme Ndiaye, Kouna Sow, Aissata Sow, Law Kouyate (chorus), Mbeya Samb (bass guitar), Assana Aldara (guitar), Azizi Diallo (piano), Beydi Thior (pianos), Law Kouyate (kora), Amadou Athiel (xalam), Moussa Gningue (drums), Elle Mbaye, Mbaye Thiam (sabar), Jololi

Badoua Den

- Banani Kone (composer, performer, arranger), Nalini, Mamani Keita, Bintou Camara (chorus), Dominique Sablier (piano), Raphael Chossin (drums), Julio (bass guitar), Mouriba Koita, Fousseni Kouyate (N'goni), Moussa Kone, Djelikedjan, Yacou (cora), Oumar Dagon, Moussa Kouyate, Partrick (guitars), Kerfala Kante (arranger), Eric Bono

Bakouende

- Adama Drame (performer, arranger, composer, djembe, tama, doumdoum, chekere, voice, harmonica), Yacouba Kone (djembe), Bakari Doumbia (zin-zin), Mamadou Diabate ( balafon), Djesou Mory Kante (accoustic and electric guitar), Adjara Cisse (lead vocal), Oulare, Mariame Sylla, Tagaly (chorus), Adama Troare (accoustic guitar), Augustin Lompo (bass), Bassirou Sanou (flute), Tinminu Adio (tama), Brass: Andre Laourou, Dadie, Franck Desamin, Dramane Kienou (djembe accompaniment), Lamine Soumano (kora), Seydoni Production B.F.

Baladjigui Moussa

- Musa Afia Ngum (writer, composer, arranger, lead vocal), Mbaye Gaye, Amie Cham (backing vocal), Sara Ba (flute), Bakery Cissokho (kora), Alioun Manneh (balafon), Pape Ndiaye Guewell (percussion), Malick Soce (xalam), Wole Rendall

Bamba

- Malick Ly (composer, lead vocal, guitar solo), Daouda N'Diaye (chorus, drums, arrangement), Habib Niente (chorus, bass, orchestra leader), Pathe Dieng (chorus, percussion), Libasse Seye (keyboard), Studio 2000

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