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"ECO" Samba

A Banyoro na bakyala

A preliminary investigation of the structure of green wattle tannin (acacia decurrens willd)

  • Authors: Glueck, Leonard David
  • Date: 1952
  • Subjects: Tannins , Tannin plants
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:4475 , http://hdl.handle.net/10962/d1011988 , Tannins , Tannin plants
  • Description: Green wattle tannin extracts were separated by lead salt precipitation into a phenolic tannin fraction and a nontannin fraction. The combustion analysis of the tannin fraction corresponded to an empirical formula C₁₅H₁₄O₆. Methoxy and acetyl values showed four oxygens were hydroxy groups while the residual oxygens could either be ether linked or carbonyl groups. Diazomethane methylation produced a white product of high methoxyl value which indicated that the four hydroxyl groups were phenolic. Chromatography of the lead salt purified tannin showed an indistinct non-fluorescent trail. Ether extraction of the tannin removed the associated Phenolic bodies. The ethereal extract unlike black wattle extracts contained no fisetin and evaporation of the ethereal solutions yielded a gummy non-crystalline residue. Alkaline fusion of the purified tannin produced for the first tlme a variety of acidic and phenolic compounds i.e. resorcinol, pyrogaloll, phloroglucinol β-resorcylic acid, gallic acid and protocatechuic acid. From the high yields of resorcinol (6%) and gallic acid (3%), these units appear to predominate. These degradation productions, coupled with the analytical figures, indicate a possible C₁₅ unit with resorcinol and pyrogallol nuclei as a basis. The non-tannin fraction failed to reveal any compound which might cause the excessive redness in green wattle extracts. Chromatography of this non-tannin fraction showed the presence of sucrose.
  • Full Text:
  • Date Issued: 1952

A speech

A study of cation exchange in South African soils

  • Authors: Du Toit, A A
  • Date: 1952
  • Subjects: Soil chemistry , Ion exchange
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:4462 , http://hdl.handle.net/10962/d1011506 , Soil chemistry , Ion exchange
  • Description: The colloidal fraction is the vital part of a soil. These extremely minute particles determine the nature of the soil and are mainly responsible for its many and varied functions. The most important of these functions is perhaps the ability of the colloids to adsorb and exchange cations, the elements so essential to all organisms as building materials. When pure water is passed through a non-saline. soil, the leachate will contain very few dissolved cations. If, on the other hand, an electrolyte such as a weak solution of sodiun chloride, is passed through the same soil, the leachate will contain considerable quantities of calcium, magnesium and potassiun chlorides as well as much of the original sodium chloride. The number of equivalents of the cations collected will be approximately the same as the number of equivalents of sodium ions added. Sodium ions have displaced some of the calcian, magnesium and potassium ions from the soil. This phenomenon is known as cation exchange. Intro., p. 1.
  • Full Text:
  • Date Issued: 1952

Ab'omupiira bebale okusamba

Ab'omupiira bebale okusamba

Abahizi

Abakazi okuzandhda

  • Authors: Waibi and Soga men , Hugh Tracey
  • Date: 1952
  • Subjects: Music--Uganda , Soga (African people) , Folk music , Field recordings , Africa, Sub-Saharan , Africa Uganda Bugabula County f-ug
  • Language: Soga
  • Type: sound recordings , field recordings , sound recording-musical
  • Identifier: http://hdl.handle.net/10962/171292 , vital:42042 , International Library of African Music, Rhodes University, Grahamstown, South Africa , TR140-14
  • Description: "Women like playing very much. Oh! yes the women do like playing. Women should not be trusted. For if you give one a present, she gives it to her lover." This song was much appreciated by the audience which was sitting all around the players. Humorous song, with Budongo Likembe and Nsaasi tin rattle.
  • Full Text: false
  • Date Issued: 1952

Abalogo balnanira Daudi

  • Authors: Kuruseni with Soga men , Hugh Tracey
  • Date: 1952
  • Subjects: Music--Uganda , Soga (African people) , Folk music , Field recordings , Africa, Sub-Saharan , Africa Uganda Jinja f-ug
  • Language: Soga
  • Type: sound recordings , field recordings , sound recording-musical
  • Identifier: http://hdl.handle.net/10962/171419 , vital:42058 , International Library of African Music, Rhodes University, Grahamstown, South Africa , TR141-05
  • Description: Legends in this part of Africa, around the great lakes are often told to a rippling instrumental accompaniment especially to the trough zither. This song refers to the death of a certain Saza chief called Daudi. Rumour has it that after he was buried certain men (said to be socerers) went to the grave to dig him up. But just at the moment it began to rain and they diagreed so violently that they failed in their purpose and went away. The cries in the background from one of the spectators, they said, had nothing to do with the legend. The narrator unfortunately had a very husky voice. Legend in song, with 6 Budongo Likembe and 1 flat Nsaasi tin rattle.
  • Full Text: false
  • Date Issued: 1952

Abana ba Baganda batabale

Abana ba Baganda batabale

Abashi boshi

Abasungu balisa-we tata

Abasungu balisa-we tata

  • Authors: Philemon Kalela , Group of Bemba men , Hugh Tracey
  • Date: 1952
  • Subjects: Folk music--Africa , Lozi (African people) , Bemba (African people) , Folk songs, Bemba , Field recordings , Africa, Sub-Saharan , Africa Zambia Fort Roseberry f-za
  • Language: Lozi , Bemba
  • Type: sound recordings , field recordings , sound recording-musical
  • Identifier: http://hdl.handle.net/10962/183808 , vital:44071 , International Library of African Music, Rhodes University, Grahamstown, South Africa , TR182-17
  • Description: "The White people have come, father, they are flying in the sky. They have made the smelter. They have made the shaft. They brought money. They have come here for good, they will never turn back from our country. They have settled in our (Lamba) country, these settlers of the Copper Belt." This refers to great industrial intrusion into this part of Africa where large deposits of copper are now being mined in what used to be a remote and densely wooded part of the country. Topical song
  • Full Text: false
  • Date Issued: 1952

Abasungu Balisa-we Tata

Abataka bagalane

Abavuga obugali

Abavuga obugali

Abavuga obugali

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