Lead (Pb) contamination of the environment is an important human health problem. Children are vulnerable to Pb toxicity; it causes damage to the central nervous system and, in some extreme cases, can cause death. Lead is widespread, especially in the urban environment, and is present in the atmosphere, soil, water and food. Pb tends to accumulate in surface soil because of its low solubility, mobility, and relative freedom from microbial degradation of this element in the soil. Lead is present in (...) soil as a result to weathering and other pedogenic processes acting on the soil parent material; or from pollution arising caused by the anthropogenic activities; such as mining, smelting and waste disposal; or through the adoption of the unsafe and unethical agricultural practices such as using of sewage sludge, and waste water in production of vegetable crops or cultivation of vegetables near highways and industry regions. Lead concentrations are generally higher in the leafy vegetables than the other vegetables. Factors affecting lead uptake included its concentration in the soil, soil pH, soil type, organic matter content, plant species, and unsafe agriculture practices. Generally, as Pb concentration increased; dry matter yields of roots, stems and leaves as well as total yield decreased. The mechanism of growth inhibition by lead involve: a decrease in number of dividing cells, a reduction on chlorophyll synthesis, induced water stress to plants, and decreased NO 3 - uptake, reduced nitrate and nitrite reductase activity, a direct effect of lead on protein synthesis, a decrease on the uptake and concentration of nutrients in plants. The strategies to minimize Pb hazard can be represented in: (a) Phytoremediation, through natural plants are able to bio-accumulate Pb in their above–ground parts, which are then harvested for removal such as, using Indian Mustard (Brassica juncea), Ragweed (Ambrosia artemisiifolia), Hemp Dogbane (Apocynum cannabium), or Poplar trees, which sequester lead in its biomass. (b) Good and ethical agricultural practices such as cultivation of vegetables crops as far from busy streets or highways and industry regions as well as nonuse of sewage sludge and waste water in cultivated soils. (c) Increasing the absorptive capacity of the soil by adding organic matter and humic acid. (d) Growing vegetable crops and cultivars with a low potential to accumulate lead, especially in soils exposed to atmospheric pollution. (e) Washing of leafy vegetables by water containing 1 % vinegar or peeling roots, tubers, and some fruits of vegetables before consumption may be an important factor in reducing the lead concentration. (shrink)

This book reveals and discusses the foundations of law and justice. Fifteen leading lawyers and philosophers of law, representing thirteen nations and fifteen different philosophical schools examine the value and purpose of law, and the nature and requirements of law and justice. Some of the world's most learned and provocative legal scholars address the ultimate questions of legal and social philosophy from all angles and the broadest possible perspective, with special reference to the work of Mortimer Newlin Stead Sellers, and (...) the republican, liberal, and analytical schools of legal thought. The conclusions reached here are not fully unanimous, congruent or conclusive, but they represent the pinnacle of legal scholarship as it exists today and furnish the necessary basis for any future study of law, justice, or the ultimate requirements of just, effective and legitimate law and society. (shrink)

It is generally accepted among Marxists that the laws of materialist dialectics represent a great, scientifically significant achievement for human knowledge, and that they develop as cognition advances. It is also generally accepted that, under new conditions - for example, in a fundamentally new phase in the development of human society such as is presented by socialism - the objective laws of dialectics acquire distinctive new characteristics, are altered, modified. But is it proper to speak of change or evolution of (...) the laws of objective dialectics? Two different viewpoints on this matter were clearly present at the USSR Symposium in April 1965. (shrink)

Selected articles on Marxism, nationalism, and humanism by a radical humanist leader and Communist international; includes study on his life and work.

The spirit of enquiry should overwhelm the respect for tradition. The essays collected in this volume are expected to quicken that spirit.

Svoeobrazie drevnerusskoĭ filosofskoĭ mysli -- Osnovnye napravlenii︠a︡ drevnerusskoĭ mysli -- Prilozhenie. Pami︠a︡tniki religiozno-filosofskoĭ mysli Drevneĭ Rusi.

Commentary of the verse work with English explanation on the Atman and self-realization; includes text.

The network model of EEG formation has revealed a unified mechanism for disparate EEG phenomena: for various reactions as well as for ontogenetic and phylogenetic differences. EEG rhythmicity was shown to be an external manifestation of the functioning of the intracortical stabilizing system which provides normal informational operations in the cerebral cortex.

First Published in 1999. Routledge is an imprint of Taylor & Francis, an informa company.

Although transhumanism offers hope for the transcendence of human biological limitations, it generates many intrinsic and consequential ethical concerns. The latter include issues such as the exacerbation of social inequalities and the exponentially increasing technological capacity to cause harm. To mitigate these risks, many thinkers have initiated investigations into the possibility of moral enhancement that could limit the power disparities facilitated by biotechnological enhancement. The arguments often focus on whether moral enhancement is morally permissible, or even obligatory, and remain largely (...) in the realm of the hypothetical. This paper proposes that psilocybin may represent a viable, practical option for moral enhancement and that its further research in the context of moral psychology could comprise the next step in the development of moral transhumanism. (shrink)