Richard Liversidge and De Beers

Ostrich ◽  
2004 ◽  
Vol 75 (4) ◽  
pp. vi-vi
Author(s):  
NF Oppenheimer
Keyword(s):  
De Beers

Reflection electron microscopy of as-grown diamond surfaces

1993 ◽  
Vol 51 ◽  
pp. 1006-1007
Author(s):  
Z.L. Wang ◽  
J. Bentley ◽  
R.E. Clausing ◽  
L. Heatherly ◽  
L.L. Horton
Keyword(s):  
Electron Microscopy ◽  
Synthetic Diamond ◽  
High Energy ◽  
Dark Field ◽  
Reverse Direction ◽  
Diamond Surfaces ◽  
Grain Sizes ◽  
Synthetic Diamonds ◽  
De Beers ◽  
Reflection Electron Microscopy

It has been found that the abrasion of diamond-on-diamond depends on the crystal orientation. For a {100} face, the friction coefficient for sliding along <011> is much higher than that along <001>. For a {111} face, the abrasion along <11> is different from that in the reverse direction <>. To interpret these effects, a microcleavage mechanism was proposed in which the {100} and {111} surfaces were assumed to be composed of square-based pyramids and trigonal protrusions, respectively. Reflection electron microscopy (REM) has been applied to image the microstructures of these diamond surfaces.{111} surfaces of synthetic diamond:The synthetic diamonds used in this study were obtained from the De Beers Company. They are in the as-grown condition with grain sizes of 0.5-1 mm without chemical treatment or mechanical polishing. By selecting a strong reflected beam in the reflection high-energy electron diffraction (RHEED) pattern, the dark-field REM image of the surface is formed (Fig. 1).

De Beers go sculling

1975 ◽  
Vol 54 (6) ◽  
pp. 333
Keyword(s):  
De Beers

De Beers Diamond Insight Report 2019

2020 ◽  
Vol 37 (1) ◽  
pp. 3-3
Author(s):  
Carol M. Stockton
Keyword(s):  
De Beers

Diamond producers ranking next after De Beers and ALROSA

2018 ◽  
Vol 137 (1/2018) ◽  
pp. 79-83
Author(s):  
Danilov Yu.G. ◽  
Pakhomov A.A. ◽  
Leontiev S.P.
Keyword(s):  
De Beers

More about Diamonds

2019 ◽  
pp. 115-119
Author(s):  
Vladimir Shubin
Keyword(s):  
United Kingdom ◽  
South African ◽  
Personal Experience ◽  
African Studies ◽  
Short Term ◽  
Soviet State ◽  
The United Kingdom ◽  
De Beers

The article is a rejoinder to the work of Yury S. Skubko, previously published in the Journal of the Institute for African Studies, on Moscow’s relations with De Beers. It is based not only on the available literature but also on the author’s personal experience. The author shows that under the monopoly of this South African company in the field of diamond sales, Soviet organizations, even in the conditions of a South African boycott, were forced to deal with its subordinate structures and the attempts to sideline them were in vain. In particular the article analyses the attitude to a controversial agreement signed by the Soviet state-owned “Glavalmalmazzoloto” and De Beers Centenary in 1990, when, like in many other cases in the “Gorbachev’s era” Moscow’s principle stand was eroded for short-term results even personal gains. The author comes to the conclusion that the responsibility for Moscow’s dealings with De Beers must be borne not by our country, but above all by the United Kingdom, which allowed De Beers have the headquarters of its Central Selling Organisation (CСO) in London.

Identificación de los pacientes con elevado riesgo de presentar problemas relacionados con medicamentos segun los criterios de Beers

2012 ◽  
Vol 47 (5) ◽  
pp. 238-239 ◽  
Author(s):  
Pilar Sáez-López ◽  
Araceli López-Sáez ◽  
Sonsoles Paniagua-Tejo
Keyword(s):  
De Beers

More on Diamonds and De Beers

2021 ◽  
pp. 120-126
Author(s):  
Yury Skubko ◽  
Keyword(s):  
Cold War ◽  
South African ◽  
Industrial Development ◽  
Previous Analysis ◽  
African Studies ◽  
Internal Colonialism ◽  
Long Period ◽  
De Beers

The author develops and supplements his previous analysis of a long period of Moscow’s confidential cooperation with South African diamond cartel De Beers, both forced and mutually beneficial, initially in the 1920s, then from late 1950s to early 1990s (Journal of the Institute for African Studies №3(40),2017). According to recently released documents such cooperation also continued between these two periods. It provided Soviet enterprises with imported industrial diamonds for precision instruments and augmented the country’s defense potential during the period of toughest Western Cold war sanctions in 1949–1953, before the discovery and extraction of rich deposits of Yakut diamonds. The article contains some interesting evidence of Russian diaspora involvement in South African industrial development. The author also calls for greater objectivity in historic analysis of the period of South African internal colonialism and anti-apartheid struggle.

De Beers 2020 Diamond Market Reports

2021 ◽  
Vol 37 (6) ◽  
pp. 557-557
Author(s):  
Carol M Stockton
Keyword(s):  
De Beers

scholarly journals Prescrição de medicamentos potencialmente inapropriados para idosos: um estudo transversal em instituição psiquiátrica

2016 ◽  
Vol 65 (2) ◽  
pp. 149-154 ◽  
Author(s):  
Kaio Vinicius Freitas de Andrade ◽  
Cintya da Silva Filho ◽  
Letícia Lima Junqueira
Keyword(s):  
De Beers

RESUMO Objetivo Estimar a frequência de prescrição de medicamentos potencialmente inapropriados (MPIs) para idosos institucionalizados em um hospital psiquiátrico. Métodos Estudo descritivo, transversal, baseado em análise de prescrições médicas para indivíduos com 65 anos ou mais (n = 40), elaboradas no mês de janeiro de 2013 e coletadas de prontuários médicos, em uma instituição hospitalar pública especializada em saúde mental. Foram analisadas variáveis sociodemográficas e clínicas relativas ao idoso. Os medicamentos prescritos foram categorizados, pelos Critérios de Beers (CB), em: 1) MPIs que devem ser evitados em qualquer condição clínica; 2) MPIs nas condições clínicas identificadas no estudo; 3) medicamentos que devem ser utilizados com precaução em idosos. Resultados Houve predomínio do sexo feminino (62,5%, n = 25/40). Em relação à idade, a média foi de 73 anos (66-93 anos). O tempo médio de internamento foi de 15 anos, e o principal diagnóstico foi de esquizofrenia (56,4%; n = 22/39). A prevalência de polifarmácia foi de 70%. Os medicamentos mais prescritos foram prometazina e haloperidol. Em relação aos CB, observou-se que 40,2% (n = 90/224) dos medicamentos prescritos foram classificados como MPIs em qualquer condição clínica; 38,8% (n = 87/224) foram considerados como MPIs em determinadas condições clínicas e 23,7% (n = 53/224) pertenciam à categoria dos medicamentos que devem ser utilizados com cautela em idosos. Conclusão Obteve-se elevada prevalência de MPIs para idosos, quando comparada com estudos semelhantes. Os CBs contribuíram para a análise das prescrições, possibilitando a identificação de medicamentos que podem potencializar os riscos de desenvolvimento de iatrogenias ou agravamento de patologias preexistentes.

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