L'apport de l'Égypte à l'histoire des techniques
In: Journal of the economic and social history of the Orient: Journal d'histoire économique et sociale de l'orient, Band 51, Heft 2, S. 398-402
ISSN: 1568-5209
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In: Journal of the economic and social history of the Orient: Journal d'histoire économique et sociale de l'orient, Band 51, Heft 2, S. 398-402
ISSN: 1568-5209
China has increasingly intensified engagement with Africa since 2000. In 2001, trade between Africa and China was at $10.6 billion. In 2011, trade had exploded to over $160 billion.1 Chinese investment in Africa has grown from tens of millions of dollars to over $10 billion.2 This surge of trade and investment in Africa has not yet been matched by any other global power. Recently, Hu Jintao doubled China's loan commitment to Africa to over $20 billion. This increase of trade and investment reflects a growing Chinese influence in Africa.3 What caused this increased Chinese interest in a continent that has been overlooked by the rest of the world? As China increases its influence among the world's major powers, many argue that it will soon confront the United States. Whether or not this happens will be determined by how successful China is at creating new "friends" in the international system. As the United States' primacy maintains a high level of cultural and economic influence throughout the world, China may have to create new economic, political, and social norms in order to attract new partners. These partners will help offset the United States' dominating influence over the global political order. This paper argues that an increased level of trade and investment in Africa is one of China's strategies to create a new identity by engaging in Social Creativity, as Social Identity Theory (SIT) specifies. First, current theories of why China is engaging in Africa will be evaluated. This evaluation includes theories of Liberalism, Colonialism/Neo-colonialism, and Neo-realism. The most effective at answering the question of why China invests so heavily in Africa is neo-realism, arguing that China engages Africa to ascertain resources and gain a geopolitical advantage in the region,. However, this does not fully explain Chinese behavior in the region. The paper will then explain the origins and applications of Social Identity Theory in explaining China's Africa policy. After laying out the theoretical discussion, the paper will analyze two case studies. The first is a comprehensive look at China's behavior and policy towards Africa as a group of states. The second is an investigation of how SIT applies on a micro level, using statements and news sources to analyze the case of Zimbabwe.
BASE
Honey is nature's sweetest gift. But did you know that honey may contain pesticides? Farmers use pesticides to kill pests that harm their crops. But pesticides also hurt honey bees and other beneficial insects. Furthermore, when bees collect nectar from flowers which received pesticide treatments, these chemicals make their way into the honey. In the past, scientists found neonicotinoids (a class of pesticides) in about half of the honey samples collected in the United Kingdom. Since 2014, the European Union banned neonicotinoids in flowering crops that bees visit. We wanted to know how effective this policy was. Does UK honey still contain neonicotinoids? Here, we collected and tested honey samples from beekeepers across the UK. We found that about a fifth of all honey contained neonicotinoids. These chemicals are not at dangerous levels for human health but may harm the bees in the long run.
BASE
Due to concerns over negative impacts on insect pollinators, the European Union has implemented a moratorium on the use of three neonicotinoid pesticide seed dressings for mass-flowering crops. We assessed the effectiveness of this policy in reducing the exposure risk to honeybees by collecting 130 samples of honey from bee keepers across the UK before (2014: N = 21) and after the moratorium was in effect (2015: N = 109). Neonicotinoids were present in about half of the honey samples taken before the moratorium, and they were present in over a fifth of honey samples following the moratorium. Clothianidin was the most frequently detected neonicotinoid. Neonicotinoid concentrations declined from May to September in the year following the ban. However, the majority of post-moratorium neonicotinoid residues were from honey harvested early in the year, coinciding with oilseed rape flowering. Neonicotinoid concentrations were correlated with the area of oilseed rape surrounding the hive location. These results suggest mass flowering crops may contain neonicotinoid residues where they have been grown on soils contaminated by previously seed treated crops. This may include winter seed treatments applied to cereals that are currently exempt from EU restrictions. Although concentrations of neonicotinoids were low (<2.0 ng g-1), and posed no risk to human health, they may represent a continued risk to honeybees through long-term chronic exposure.
BASE
Due to concerns over negative impacts on insect pollinators, the European Union has implemented a moratorium on the use of three neonicotinoid pesticide seed dressings for mass flowering crops. We assessed the effectiveness of this policy in reducing the exposure risk to honeybees by collecting 130 samples of honey from bee keepers across the UK before (2014: N = 21) and after the moratorium was in effect (2015: N = 109). Neonicotinoids were present in about half of the honey samples taken before the moratorium, and they were present in over a fifth of honey samples following the moratorium. Clothianidin was the most frequently detected neonicotinoid. Neonicotinoid concentrations declined from May to September in the year following the ban. However, the majority of post-moratorium neonicotinoid residues were from honey harvested early in the year, coinciding with oilseed rape flowering. Neonicotinoid concentrations were correlated with the area of oilseed rape surrounding the hive location. These results suggest mass flowering crops may contain neonicotinoid residues where they have been grown on soils contaminated by previously seed treated crops. This may include winter seed treatments applied to cereals that are currently exempt from EU restrictions. Although concentrations of neonicotinoids were low (<2.0 ng g-1), and posed no risk to human health, they may represent a continued risk to honeybees through long-term chronic exposure.
BASE