scholarly journals The influence of different types of granite on indoor radon concentrations of dwellings in the South African West Coast Peninsula

2019 ◽  
Vol 12 (1) ◽  
pp. 375-382
Author(s):  
R. R. Le Roux ◽  
J. Bezuidenhout ◽  
H. A. P. Smit
Keyword(s):  
South African ◽  
West Coast ◽  
Indoor Radon ◽  
The South ◽  
Different Types ◽  
Radon Concentrations

INDOOR RADON MEASUREMENTS FOR THE SOUTH AFRICAN WEST COAST PENINSULA

2020 ◽  
Vol 191 (2) ◽  
pp. 144-149
Author(s):  
Rikus le Roux ◽  
Jacques Bezuidenhout ◽  
Hennie Smit
Keyword(s):  
South Africa ◽  
South African ◽  
West Coast ◽  
Radon Concentration ◽  
Recent Article ◽  
Indoor Radon ◽  
The West ◽  
High Concentrations ◽  
Radon Measurements ◽  
Radon Concentrations

Abstract Granite commonly contains high concentrations of uranium, with consequent high exhalation of radon. The geology of the West Coast peninsula of South Africa is dominated by granite, and a recent article predicted potentially high indoor radon concentrations in this region’s two largest towns, Vredenburg and Saldanha. This research aimed to measure indoor radon levels in these towns. Measurements were first done for a minimum of 3 d during warmer months, with houses typically being more ventilated. Thirty-four homes in Vredenburg and 27 in Saldanha were measured, and the average indoor radon determined to be 40 and 58 Bq m−3, respectively. The measurements were then repeated during the colder months, and an increase in average radon concentration of 173 Bq m−3 for Saldanha and 153 Bq m−3 for Vredenburg was found. The granite geology and lifestyle of occupants during the colder months seem to contribute towards elevated levels of indoor radon concentrations.

scholarly journals Occupational segregation of work and income disparities among South African women

2002 ◽  
Vol 5 (1) ◽  
pp. 111-122 ◽  
Author(s):  
P. Lalthapersad
Keyword(s):  
Labour Market ◽  
South African ◽  
African Women ◽  
The South ◽  
Female Workers ◽  
Income Disparities ◽  
Different Types ◽  
South African Women ◽  
Wage Disparities ◽  
Made In

Despite the increase in the number of women participating in the South African labour market in recent years, little progress has been made in removing wage disparities, eradicating women's marginality in the labour market, reassessing women's work or changing the traditional occupational ghettos of women. Not only does the South African labour market exhibit anomalies in respect of the gender composition of occupations, there are substantial differences by race. A good barometer of determining the extent to which men and women undertake different types of jobs, is to analyse the percentage of male and female workers per occupational category.

Improving the catch efficiency of the West Coast rock lobster, Jasus lalandii

2000 ◽  
Vol 51 (6) ◽  
pp. 613 ◽  
Author(s):  
D. Loewenthal ◽  
S. Mayfield ◽  
G. M. Branch
Keyword(s):  
Weight Loss ◽  
South African ◽  
West Coast ◽  
Capture Rate ◽  
Catch Rate ◽  
Rock Lobster ◽  
The South ◽  
The West ◽  
The Relationship

The South African commercial rock-lobster industry employs an average soak time of 22 h for traps. Experiments were undertaken to test (1) the rate of bait loss with soak time and the effect that protection of the bait has on bait loss, (2) the relationship between catch rate (numbers per trap) and soak time for traps with either protected or unprotected bait, and (3) the effect of two bait types (whole maasbanker and hake heads) on the catch of rock lobsters. There were substantial losses of unprotected bait within 6 h; substantially less weight loss was observed from protected bait even after a 48-h soak time. The numbers of rock lobsters caught in traps with unprotected bait were low relative to the capture rate with protected bait. The highest capture rate occurred after 6 h for unprotected bait and 6–12 h for protected bait. There was no significant effect of bait type (maasbanker v. hake heads) on the number or size of rock lobsters. To optimize catch efficiency, the commercial industry should use protected bait and soak times as short as 6–12 h.

The South African Fisheries: A Preliminary Survey of Historical Sources

2001 ◽  
pp. 167-180
Author(s):  
Lance van Sittert
Keyword(s):  
South African ◽  
West Coast ◽  
Marine Resources ◽  
Historical Records ◽  
Preliminary Survey ◽  
Rock Lobster ◽  
The South ◽  
Historical Sources ◽  
The West

Lance van Sittert explores the historical records concerning the exploitation of marine resources along the West Coast of Africa, using them to provide evidence of the commerical importance of the West Coast over the East or South. The date demonstrates a boom-bust cycle along the West Coast, pertaining to whales, snoek, guano, rock lobster, hake, and pilchard.

Seaweeds of the South African West Coast

Phycologia ◽  
1998 ◽  
Vol 37 (5) ◽  
pp. 402-403 ◽  
Author(s):  
Alan J. K. Millar
Keyword(s):  
South African ◽  
West Coast ◽  
The South
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