A procedure for identifying significant environmental aspects in sea ports

A new methodology has been designed to identify and rank the significant environmental aspects in sea ports. The main objective of the Strategic Overview of Significant Environmental Aspects (SOSEA) is to help port managers to identify significant environmental aspects and to reinforce the awareness about them in order to prioritise work in environmental management. Developed in close collaboration with port environmental managers and tested in a set of ports, it is a user-friendly tool that can be applied in approximately half a working day. It is based on ISO 14001 vocabulary and requirements and it can be considered as the base for the implementation of any Environmental Management System for port communities.     

Water quality condition and trend in North Queensland waterways

The Queensland Environmental Protection Agency monitored water quality at 133 sites in North Queensland waterways between Cooktown and Bundaburg from 1992 to 2001. Condition of the waterways was rated by comparing recent data with the Queensland Water Quality Guidelines. Long-term trends were analysed using a censored regression technique that incorporates the effects of flow, temperature, seasonality and allows for long-term non-linear trends. Many sites were in good condition; those in poor condition were usually impacted by point source discharges; those in moderate condition were usually impacted by agricultural land use. There were no consistent long-term trends across the whole region. Recommendations for future programs include incorporating pressure indicators, ensuring high standards of quality assurance, including covariates such as rainfall in trend assessment and continuing programs over more than 10 years to allow detection of trends due to changes in land-use.     

In the other 90%: phytoplankton responses to enhanced nutrient availability in the Great Barrier Reef Lagoon

Our view of how water quality effects ecosystems of the Great Barrier Reef (GBR) is largely framed by observed or expected responses of large benthic organisms (corals, algae, seagrasses) to enhanced levels of dissolved nutrients, sediments and other pollutants in reef waters. In the case of nutrients, however, benthic organisms and communities are largely responding to materials which have cycled through and been transformed by pelagic communities dominated by micro-algae (phytoplankton), protozoa, flagellates and bacteria. Because GBR waters are characterised by high ambient light intensities and water temperatures, inputs of nutrients from both internal and external sources are rapidly taken up and converted to organic matter in inter-reefal waters. Phytoplankton growth, pelagic grazing and remineralisation rates are very rapid. Dominant phytoplankton species in GBR waters have in situ growth rates which range from approximately 1 to several doublings per day. To a first approximation, phytoplankton communities and their constituent nutrient content turn over on a daily basis. Relative abundances of dissolved nutrient species strongly indicate N limitation of new biomass formation. Direct ((15)N) and indirect ((14)C) estimates of N demand by phytoplankton indicate dissolved inorganic N pools have turnover times on the order of hours to days. Turnover times for inorganic phosphorus in the water column range from hours to weeks. Because of the rapid assimilation of nutrients by plankton communities, biological responses in benthic communities to changed water quality are more likely driven (at several ecological levels) by organic matter derived from pelagic primary production than by dissolved nutrient stocks alone.     

确定矿石工业品位指标的经济原则

在勘探工作的各个阶段上(选择初勘对象,将储量划分为表内矿和表外矿,合理地开发已探明的储量)的矿床评价问题,都与矿石工业品位指标的确定有密切的联系.目前,批发价格仍然是确定矿石品位指标的经济依据.根据这个原则,开采能有盈利的储量,即在工业利用的一定期间能回收基建投资的矿产资源,才算作表内矿量.但是经验证明,根据批发价格确定矿石品位指标的做法,往往导致不良的后果.例     

巴什基里亚含铜黄铁矿隐伏矿床的预测和找矿

在巴什基里亚的几个矿区——锡拜、巴依马克、布里拜——从事的研究,重点是查明隐伏矿床预测的必要因素,有如:在容矿火山岩层的地质剖面上,在矿区与矿田的构造上,以及在围岩热液蚀变晕中含铜黄铁矿矿体的分布规律.现将研究确定的若干基本规律介绍如下:在马格尼托哥尔斯克大复向斜范围内,含铜黄铁矿矿床赋存于细碧角斑岩(钠流纹玄武岩)建造的志留纪和中泥盆世火山岩系中.不同成分岩层的接触带,经常是辉绿岩与英安玢岩的接触带,以及火山碎屑岩层对硫化矿分布最为有利.含矿火山岩系被中、     

2-辛胺吡啶—新的萃取试剂

等人曾提出用n—辛苯胺(OA)富集铂族金属时指出,惰性稀释剂中的OA能够在酸性介质中萃取钯和铂,在中性介质中以配位—溶剂化方式萃取铑。3(5)—甲基吡唑由盐酸溶液中萃取钯和铑。在吸着剂上吸着铂族金属,是基于苯乙烯和3(5)—甲基吡唑的共聚合物,同铂族金属形成以M-N键的化合物。显然,芳香胺对铂族金属具有一定的特效性。由脂肪胺转变为苯胺和杂环芳香胺时氮原子得更“软”。铂族金属多与“软”配位体结合。     

从地理学观点看服务经济的发展

本文的目的,是研究服务经济的发展及由此引起的从工业经济向工业后经济的过渡。我们从国际观点出发进行这项研究工作,对三大洲7个工业化大国(美国、加拿大、英国、法国、西德、意大利和日本)的服务经济进行了研究和比较。什么是服务业?服务业发展演化成为一个独立的经济部门,最早是由克拉克[clark]和费希尔[Fisher]提出来的。