List of Titles

Quick View

Growth metrics and δ15N values of water hyacinth, Eichhornia crassipes, in relation to biological control

- Hill, Jaclyn M

Authors: Hill, Jaclyn M
Date: 2014
Subjects: To be catalogued
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/444744 , vital:74264 , https://www.cabidigitallibrary.org/doi/pdf/10.5555/20173070900
Description: The success of classical biological control against Eichhornia crassipes (Pontederiaceae) in South Africa has been varied, with failures attributed to numerous factors, predominantly the high levels of eutrophication of many freshwater systems. Studies have shown that increased N-loads are associated with enriched δ15N values of aquatic biota. Stable isotope analyses may therefore help to assess the nutrient status of invaded ecosystems and predict the success of classical biological control. A combination of controlled greenhouse experiments and in-situ observations were used: to quantify the δ15N equilibration rate of E. crassipes leaf tissue (ie the time span of the information on environmental N-loading); to confirm the ability of plant tissue to reflect ecosystem N-loading; and to compare standard water hyacinth growth metrics with δ15N and C/N ratios to evaluate how well they described eutrophication. Using both δ15N values and C/N ratios, it was possible to distinguish clearly between manure-, fertilizer-and control-regimes, and plant tissue provided information on ecosystem N-loading over approximately 16 days. Interpretations were complicated by the plant’s capacity for N storage. Strong correlations between petiole length of E. crassipes and δ15N values indicate that petiole length may be linked to N-loading. Weaker (or a lack of) correlations between δ15N or C/N ratios and remaining growth metrics suggest that generalisations and, or, predictions of eutrophication based on growth metrics should be avoided. A combination approach using plant tissue δ15N and C/N ratios along with maximum petiole length of E. crassipes plants may provide a time-integrated assessment of ecosystem eutrophication and help to identify areas where classical biological control may face significant obstacles in the regulation of water hyacinth populations.
Full Text:
Date Issued: 2014

Quick View

Forensic Entomology: An introduction, D.E. Gennard: book review

- Villet, Martin H

Authors: Villet, Martin H
Date: 2013
Subjects: To be catalogued
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/451721 , vital:75072 , https://hdl.handle.net/10520/EJC141290
Description: Dorothy Gennard's role in the fourth-year course in Forensic Science at the University of Lincoln has placed her in an excellent position to design a text that caters for this level. It was generally agreed (e.g. Villet and Richards 2008; Higley and Huntington 2009) that the first edition of her book, published in 2007, was a useful text for teaching introductory courses in forensics, and this substantially revised edition is even better suited to that niche. Other recently revised texts are either difficult to acquire (Haskell and Williams, 2008) or more expensive reference works (Amendt et al. 2010; Byrd and Castner 2010).
Full Text:
Date Issued: 2013

Quick View

Metal nanoparticles caused death of metastatic MDA-MB-231 breast cancer cells:

- Adeyemi, Oluyomi, Edkins, Adrienne L, Whiteley, Christopher

Authors: Adeyemi, Oluyomi , Edkins, Adrienne L , Whiteley, Christopher
Date: 2013
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/164797 , vital:41173 , DOI: 10.1016/j.toxlet.2013.05.599
Description: Available data on the toxicity of nanoparticles is a subject of controversy. The interaction of nanoparticles with biological systems including living cells has become one of the most urgent areas of collaborative research in materials science and biology. This is due to the fact that toxicity of nanomaterials are ill defined in terms of cause–effect relationships.
Full Text:
Date Issued: 2013

Quick View

On the trail on Mountain Cicadas, M Gogala: book review

- Villet, Martin H

Authors: Villet, Martin H
Date: 2013
Subjects: To be catalogued
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/451763 , vital:75075 , https://hdl.handle.net/10520/EJC141289
Description: Life is about surprises, and if we are lucky they will primarily be welcome. My copy of this book arrived as a happy surprise in the mail, and my delight did not abate until I had finished reading it. I must admit that I have met and like many of the people mentioned in this book, and that I have a special and not unsentimental interest in cicadas, but I think that readers without such background will still find this book fascinating.
Full Text:
Date Issued: 2013

Quick View

E-democracy through mobile monitoring: participatory journalism

- Reinecke, Romi, Coulson, Debbie, Thinyane, Hannah

Authors: Reinecke, Romi , Coulson, Debbie , Thinyane, Hannah
Date: 2012
Subjects: To be catalogued
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/454671 , vital:75364 , https://hdl.handle.net/10520/EJC134096
Description: The councillor promised her ward an end to the humiliation of the buck-et system and the building of suitable sanitation facilities. It's why she voted for him. And while it has taken four years, today the building ma-terial for 40 toilets, one of which will be hers, has arrived. Of course, Eunice cannot be certain all 40 toilets will be built to the planned speci-fications and timeline; that's why she's monitoring the municipality's service delivery. Eunice has her phone ready and is counting the bricks and bags of cement that will become toilets for her street under her watchful eye and with the help of a mobile application, MobiSAM, and a local newspaper.
Full Text:
Date Issued: 2012

Quick View

What's rotten in the state of South African journalism? media freedom and regulation

- Joseph, Natasha

Authors: Joseph, Natasha
Date: 2012
Subjects: To be catalogued
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/454999 , vital:75394 , https://hdl.handle.net/10520/EJC134119
Description: Earlier this year, I was invited to talk about the right to freedom of ex-pression as part of Rhodes University's annual Human Rights Week, which coincides with South Africa's Human Rights Day. It was suggest-ed that I might want to discuss the Protection of State Information Bill, the ominous Media Appeals Tribunal, or both. Perhaps I could have done those things - the bill and the tribunal are harrowing threats to our work as journalists, and to South Africans' freedom of access to information.
Full Text:
Date Issued: 2012

Quick View

Arthropod Fauna of the UAE Vol. 3, A. van Harten (Ed.): book review

- Villet, Martin H

Authors: Villet, Martin H
Date: 2010
Subjects: To be catalogued
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/451598 , vital:75062 , https://hdl.handle.net/10520/EJC32858
Description: It has been a year since the second volume of the UAE Insect Project's Arthropod Fauna of the United Arab Emirates was published, and several more members of the team of over 160 scientists from 27 countries have visited the UAE. This has provided several of the chapters in the third volume of this series, which contains contributions from 51 taxonomists from 20 countries, including South Africa. Under the patronage of His Highness Sheikh Tahoon Bin Zayed Al Nahyan and the leadership of the editor, the series is settling down to a very high standard, especially in terms of its lavish illustrations, exquisite production and, of course, taxonomic rigour.
Full Text:
Date Issued: 2010

Quick View

Forensic Entomology: The Utility of Arthropods in Legal Investigations. 2nd Edition, J.H. Byrd and J.L. Castner (Eds.): book review

- Villet, Martin H

Authors: Villet, Martin H
Date: 2010
Subjects: To be catalogued
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/451705 , vital:75071 , https://hdl.handle.net/10520/EJC32854
Description: In the last century, the primary texts on forensic entomology were those by Smith (1986) for reference, and Catts and Haskell (1990) for teaching and training. Between their publication and that of the first edition of Forensic Entomology: The Utility of Arthropods in Legal Investigations (Byrd and Castner 2000), about 16 research papers relevant to forensic entomology appeared each year; since then it has been over 40, and several more books (Greenberg and Kunish 2002; Wyss and Cherix 2006; Gennard 2007; Amendt et al. 2010) have appeared. With so much research accumulating, it was certainly time for an updated edition.
Full Text:
Date Issued: 2010

Quick View

My First Book of Southern African Insects, C. Uys: book review

- Villet, Martin H

Authors: Villet, Martin H
Date: 2010
Subjects: To be catalogued
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/451749 , vital:75074 , https://hdl.handle.net/10520/EJC32855
Description: I concur with Antoine de Saint-Exupéry (1943): we are born with a strong appreciation of the world around us that most of us lose as we grow up. While few adults have much empathy with insects, they are a source of fascination for most children, at least until they start school. The problem facing professional entomology is how to sustain and encourage that early attitude so that we recruit passionate and well-prepared people into the profession, and sensitise the remainder of the population to the value of insects.
Full Text:
Date Issued: 2010

Quick View

Caught in a blamestorm: the global financial crisis

- Rumney, Reg

Authors: Rumney, Reg
Date: 2009
Subjects: To be catalogued
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/454216 , vital:75328 , https://hdl.handle.net/10520/EJC139951
Description: The outpouring of negativity towards financial journalists has been sur-prising, symbolised by TV satirist Jon Stewart's excoriation of CNBC financial commentator Jim Cramer on the Daily Show. Journalists were no more to blame for the crisis than anyone else involved in the markets. In the subsequent ''blamestorm'', however, fingers have also been pointed at economists, analysts, bankers, quants, credit rating agencies, regulators, governments, and Alan Greenspan, to name a few.
Full Text:
Date Issued: 2009

Showing items 1 - 20 of 46