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  1. Konferenzbeitrag: Biological control of Botrytis cinerea (in: Goussard, P. G.; Archer, E.; Saayman, D.; Tromp, A.; Wyk, J. van (Eds.): Proceedings of the First SASEV International Congress, Cape Town, South Africa, 8-10 November 1995)

    Dicks, L. M. / Bence, J. K. / Goussard, P. G. / Archer, E. / Saayman, D. / Tromp, A. / Wyk, J. van (Eds.)

    1995  , Seite(n) 75–77

    Abstract: A protein isolated and purified from a cell-free medium of a wine strain of Latobacillus sp. caused granulation of the cytoplasm of the mycelium of B. cinerea, leakage of amino acids and K ions through the plasmamembrane, and enhancement of the ... ...

    Veranstaltung/Kongress Proceedings of the First SASEV International Congress
    Abstract A protein isolated and purified from a cell-free medium of a wine strain of Latobacillus sp. caused granulation of the cytoplasm of the mycelium of B. cinerea, leakage of amino acids and K ions through the plasmamembrane, and enhancement of the incorporation of EXP35S-methionine into intracellular protein. The antifungal protein is hydrophobic and >10 kDa. It is also active against several Gram +ve bacteria, and Rhizophus and Monilinia spp. (W.R. Jarvis, Harrow) [A 3262]
    Schlagwörter botrytis ; biological plant protection
    Sprache Englisch
    Dokumenttyp Konferenzbeitrag
    Datenquelle Viticulture and Enology Abstracts

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  2. Konferenzbeitrag: The use of in vitro somatic embryogenesis in grapevine improvement (in: Goussard, P. G.; Archer, E.; Saayman, D.; Tromp, A.; Wyk, J. van (Eds.): Proceedings of the First SASEV International Congress, Cape Town, South Africa, 8-10 November 1995)

    Goussard, P. G. / Wiid, J. / Archer, E. / Saayman, D. / Tromp, A. / Wyk, J. van (Eds.)

    1995  , Seite(n) 58–60

    Abstract: The effectiveness of somatic embryogenesis in eliminating viruses (GFkV, GLRaV, GFLV and its yellow mosaic serotype YM) was investigated. Dormant canes from field vines showing visual symptoms of above viruses were collected and the virus status was ... ...

    Körperschaft Univ. of Stellenbosch, Department of Viticulture and Oenology, 7602 Matieland, Republic of South Africa
    Veranstaltung/Kongress Proceedings of the First SASEV International Congress
    Abstract The effectiveness of somatic embryogenesis in eliminating viruses (GFkV, GLRaV, GFLV and its yellow mosaic serotype YM) was investigated. Dormant canes from field vines showing visual symptoms of above viruses were collected and the virus status was confirmed by immunosorbent electron microscopy (ISEM) with decoration and ELISA. Development of inflorescences on forced canes was promoted by the removal of all vegetative tissues. Anthers on ovaries were cultured on NN medium supplemented with growth regulators. Proembryogenic masses were transferred to hormone-free medium. Somatic plantlets developed from germinated embryos were acclimatised and transferred to soil. GLRaV and GFkV were not translocated from infected tissue via proliferating callus to embryoids, but other 2 viruses could not be eliminated. Raising of the culturing temperature up to 35 DEG C during the first 60 d resulted in complete elimination of all viruses. The effectiveness and less expenses of this technique comparing the conventional procedure (heat therapy combined with shoot-apex method) were emphasized. (R. Hollo, Eger) [A 3262]
    Schlagwörter in vitro culture ; embryo ; virus ; variety of vine
    Sprache Englisch
    Dokumenttyp Konferenzbeitrag
    Datenquelle Viticulture and Enology Abstracts

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  3. Artikel: Holz- und Rindenanatomie der Lauraceen IV. Dahlgrenodendron J.J.M. van der Merwe und van Wyk

    Richter, H.G. / Wyk, A.E. van

    IAWA Bulletin (Netherlands)

    1990  

    Körperschaft Bundesforschungsanstalt für Forst- und Holzwirtschaft, Hamburg (Germany, F.R.). Inst. für Holzbiologie und Holzschutz
    Schlagwörter Pflanzenanatomie ; Rinde ; Taxonomie ; Holz ; Suedafrika ; Lauraceae
    Sprache Englisch
    Ausgabenhinweis v. 11(2) p. 173-182
    Dokumenttyp Artikel
    Datenquelle ELFIS - Ernährungs-, Land- und Forstwirtschaftliches Informations-System

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  4. Artikel: Wood and Bark Anatomy of Lauraceae IV. Dahlgrenodendron J.J.M. Van Der Merwe ' Van Wyk

    Richter, H. G / Van Wyk, A. E

    IAWA journal. , v. 11, no. 2

    1990  

    Abstract: The southem African tree, Dahlgrenodendron natalense, previously ascribed to the genus Beilschmiedia was recently segregated as a monotypic genus, Dahlgrenodendron, on account of its distinctive exomorphology, palynology and fruit structure. ... ...

    Abstract The southem African tree, Dahlgrenodendron natalense, previously ascribed to the genus Beilschmiedia was recently segregated as a monotypic genus, Dahlgrenodendron, on account of its distinctive exomorphology, palynology and fruit structure. Dahlgrenodendron differs from Beilschmiedia in nearly all quantitative and qualitative features of wood and bark anatomy. The overall structural pattern of these tissues does not support the initial assignment of Dahlgrenodendron to the tribe Cryptocaryeae, nor does it fit any other lauraceous taxon. Within Lauraceae, an isolated non-aligned status is provisionally proposed for the genus.
    Schlagwörter bark ; Beilschmiedia ; fruits ; palynology ; trees ; wood ; wood anatomy
    Sprache Englisch
    Umfang p. 173-182.
    Erscheinungsort Brill
    Dokumenttyp Artikel
    ISSN 0928-1541
    DOI 10.1163/22941932-90000513
    Datenquelle NAL Katalog (AGRICOLA)

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  5. Buch: The minimum subsistence level of non-whites living in the main urban areas of the Republic of South Africa, May 1974 [The field for the study was carried out mainly by M. Loubser, B. A. Moolman and H. de J. van Wyk]

    Nel, Petrus Abel / Loubser, M / Moolman, B. A / Wyk, H. de J. van

    ((Bureau of Market Research, University of South Africa. Research report ; 41))

    1974  

    Titelvarianten The minimum subsistence level of non-whites living in the main urban areas of the Republic of South Africa, May 1974
    Serientitel (Bureau of Market Research, University of South Africa. Research report ; 41)
    Schlagwörter Lebenshaltungsminimum ; Südafrikanische Republik ; Kapstadt ; Durban ; East London ; Johannesburg ; Pretoria ; Port Elizabeth
    Sprache Nicht zu entscheiden
    Umfang V Bl., 32,78 S. 4"
    Dokumenttyp Buch
    ISBN 0949951390 ; 9780949951397
    Datenquelle ECONomics Information System

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  6. Artikel ; Online: University and stakeholder partnerships to innovate in sport - the development of the South African Cricketers' Association (SACA) career transition screening tool.

    Hendricks, S / van Wyk, J P / Player, B / Schlebusch, R

    South African journal of sports medicine

    2023  Band 35, Heft 1, Seite(n) v35i1a15218

    Abstract: In sports, the value and mutual benefit of university-stakeholder partnerships have been well-recognised. It has been argued that cricket has a unique set of challenges compared to other team sports. In 2016, the South African Cricketers' Association ( ... ...

    Abstract In sports, the value and mutual benefit of university-stakeholder partnerships have been well-recognised. It has been argued that cricket has a unique set of challenges compared to other team sports. In 2016, the South African Cricketers' Association (SACA) and the University of Cape Town established a partnership to (i) conduct novel research on professional cricketers and (ii) ensure SACA programmes and initiatives are informed by said research and/or the currently available literature. As the demand on professional cricketers has increased, so has the interest in their career transitioning. That is, how do professional cricketers manage stressors created by changes (or non-changes) throughout their playing careers? To help identify gaps for intervention as a cricketer transitions through their professional career, the purpose of this short report is to describe how a university-stakeholder partnership developed a career transitioning screening tool for professional cricketers in South Africa.
    Sprache Englisch
    Erscheinungsdatum 2023-06-05
    Erscheinungsland South Africa
    Dokumenttyp Journal Article
    ZDB-ID 2475947-8
    ISSN 2078-516X ; 2078-516X
    ISSN (online) 2078-516X
    ISSN 2078-516X
    DOI 10.17159/2078-516X/2023/v35i1a15218
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  7. Artikel ; Online: What is in a name? Scientific name changes of potentially poisonous plants and fungi in South Africa.

    Botha, C J / van Wyk, A E

    Journal of the South African Veterinary Association

    2022  Band 93, Heft 2, Seite(n) 76–81

    Abstract: Changes over the past five decades in the scientific names of some potentially poisonous plants and toxigenic fungi in South Africa are briefly reviewed. Some of the reasons why taxonomists change names are highlighted. In recent years, DNA sequencing ... ...

    Abstract Changes over the past five decades in the scientific names of some potentially poisonous plants and toxigenic fungi in South Africa are briefly reviewed. Some of the reasons why taxonomists change names are highlighted. In recent years, DNA sequencing data have contributed considerably towards establishing phylogenetic relationships among plants, often resulting in changes in generic circumscription and, consequently, the names of species. Philosophical differences between the phylogenetic and the evolutionary schools of plant classification are briefly explained as these may manifest as different classifications for the same group of plants. Although choice of classification remains the prerogative of the end-user of plant names, in this review, the classifications for plants currently adopted by the South African National Biodiversity Institute (SANBI) in its online database, Plants of Southern Africa (POSA), were followed. Noteworthy generic changes include
    Mesh-Begriff(e) Animals ; Plants, Toxic ; Phylogeny ; South Africa ; Australia ; Fungi
    Sprache Englisch
    Erscheinungsdatum 2022-06-16
    Erscheinungsland South Africa
    Dokumenttyp Review ; Journal Article
    ZDB-ID 188571-6
    ISSN 2224-9435 ; 1019-9128 ; 0301-0732 ; 0038-2809
    ISSN (online) 2224-9435
    ISSN 1019-9128 ; 0301-0732 ; 0038-2809
    DOI 10.36303/JSAVA.160
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  8. Artikel: Comparison of fixed and random regression models for the analysis of milk production traits in South African Holstein dairy cattle under two production systems

    Van Niekerk, M. / Neser, F. / Van Wyk, J. / Ducrocq, V.

    Livestock science

    2023  Band 267, Heft -, Seite(n) 105125

    Sprache Englisch
    Dokumenttyp Artikel
    ZDB-ID 2226176-X
    ISSN 1871-1413
    Datenquelle Current Contents Ernährung, Umwelt, Agrar

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  9. Artikel: Comparison of fixed and random regression models for the analysis of milk production traits in South African Holstein dairy cattle under two production systems

    Van Niekerk, M. / Neser, F. / Van Wyk, J. / Ducrocq, V.

    Livestock science

    2023  Band 267, Heft -, Seite(n) 105125

    Sprache Englisch
    Dokumenttyp Artikel
    ZDB-ID 2226176-X
    ISSN 1871-1413
    Datenquelle Current Contents Ernährung, Umwelt, Agrar

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  10. Artikel ; Online: Ventilator-associated pneumonia in PICU - how are we doing?

    van Wyk, L / Applegate, J T / Salie, S

    The Southern African journal of critical care : the official journal of the Critical Care Society

    2022  Band 38, Heft 2

    Abstract: Background: Ventilator-associated pneumonia (VAP) is a common hospital-acquired infection in children, leading to an increase in morbidity and mortality. A previous study in 2013 showed that VAP rates decreased dramatically after implementation of a VAP ...

    Abstract Background: Ventilator-associated pneumonia (VAP) is a common hospital-acquired infection in children, leading to an increase in morbidity and mortality. A previous study in 2013 showed that VAP rates decreased dramatically after implementation of a VAP bundle and appointing a VAP coordinator. As part of a 'Plan, Do, Study, Act' cycle, it was necessary to evaluate the efficacy of these interventions.
    Objectives: To evaluate the VAP rate in the paediatric intensive care unit (PICU) over 2 years (2017 - 2018), and to describe the causative organisms and antibiotic sensitivity/resistance patterns during this period.
    Methods: This was a retrospective, descriptive study using the existing PICU VAP database as well as clinical folders.
    Results: Over the 2 years, 31 VAP cases were identified. The VAP rate for 2017 was 4.0/1 000 ventilator days and 5.4/1 000 ventilator days for 2018. Compliance with the VAP bundle was 68% in 2017 and 70% in 2018. The median (interquartile range (IQR)) duration of ventilation in 2017 was 9 (6 -12) days and 15 (11 - 28) days in 2018. The median (IQR) length of PICU stay in 2017 was 11 (8 - 22) days and 25 (17 - 37) days in 2018. The most common cultured organism was an extended-spectrum beta-lactamase (ESBL)
    Conclusion: Our VAP rate has not decreased since 2013. It is imperative that we improve compliance with the VAP bundle, in order to reduce VAP rates.
    Contributions of the study: This study highlights the need for ongoing evaluation of quality improvement initiatives in PICU, considering that VAP rates remained largely unchanged from 2013 to 2018.
    Sprache Englisch
    Erscheinungsdatum 2022-08-05
    Erscheinungsland South Africa
    Dokumenttyp Journal Article
    ZDB-ID 1218506-1
    ISSN 2078-676X ; 1562-8264
    ISSN (online) 2078-676X
    ISSN 1562-8264
    DOI 10.7196/SAJCC.2022.v38i2.536
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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