Spatial and Temporal Variations in Trace Metal Concentrations in the Cockle, Austrovenus Stutchburyi from Otago, New Zealand

This is the first comprehensive study of sources of variation in metal concentrations within the whole tissues of a shallow burrowing, filter-feeding intertidal clam, Austrovenus stutchburyi. Samples were collected from 12 sites in April, August, November and February in 1993–1994 in the vicinity of Otago Harbour and Peninsula, New Zealand. Total tissue trace metal concentrations (μg g⁻¹ dry weight) were measured in individual animals for the essential metals : Mn, Cu, Zn, Ni and the non-essential Cr using trace-metal clean acid-digestion and ICP-OAES techniques. Average metal concentrations were 3–60 μg g⁻¹ for Cu, 40–118 μg g⁻¹ for Zn, 2–12 μg g⁻¹ for Mn, 5–35 μg g⁻¹ for Ni and 1–44 μg g⁻¹ for Cr. These levels decreased with body weight and differed amongst sites except for Cr in February (mid-summer). Highest concentrations occurred at sites close to a city (Dunedin) and within the central harbour region although the Cu, Zn, Ni and Cr concentrations did not correlate with the environmental gradient or season. At one coastal site, samples of both the blue mussel Mytilus galloprovincialis and cockles gave similar trends in trace metal levels. These results suggest that the cockle could be a useful trace metal biomonitor within NZ estuaries.     

Role of glycine on sulfuric acid-ammonia clusters formation: Transporter or participator

Glycine(Gly) is ubiquitous in the atmosphere and plays a vital role in new particle formation(NPF).However,the potential mechanism of its on sulfuric acid(SA)-ammonia(A)clusters formation under various atmospheric conditions is still ambiguous.Herein,a(Gly)_x·(SA)_y·(A)_z(z≤x+y≤3) multicomponent system was investigated by using density functional theory(DFT) combined with Atmospheric Cluster Dynamics Code(ACDC) at different temperatures and precursor concentrations.The results show that Gly,with one carboxyl(-COOH) and one amine(-NH_2) group,can interact strongly with SA and A in two directions through hydrogen bonds or proton transfer.Within the relevant range of atmospheric concentrations,Gly can enhance the formation rate of SA-A-based clusters,especially at low temperature,low [SA],and median [A].The enhancement(R) of Gly on NPF can be up to 340 at T=218.15 K,[SA]=10~4,[A]=10~9,and [Gly]=10~7 molecules/cm~3.In addition,the main growth paths of clusters show that Gly molecules participate into cluster formation in the initial stage and eventually leave the cluster by evaporation in subsequent cluster growth at low [Gly],it acts as an important "transporter" to connect the smaller and larger cluster.With the increase of [Gly],it acts as a "participator" directly participating in NPF.     

国土空间规划新时代旅游规划的定位与转型

我国已经迈入以国土空间规划引领“多规合一”的空间治理新时代,对各专项规划的管控约束性更严、技术性和衔接性要求更高。为此,本文重新审视了旅游规划的性质和地位,并基于产业专项性和空间融合性特征,将旅游规划分为战略规划、协调规划、发展规划和开发规划。以旅游发展规划为示例,提出了六大转型:规划理念从无限思维向边界思维、融合理念和空间思维转变,编制思路从甲方意志向市场导向转变,规划内容从大而全向专而精转变,技术路线从概念逻辑向空间逻辑转变,规划方式从封闭向开放转变,规划技术从缺乏技术到技术融合转变以期推动旅游规划衔接和融入新时代国土空间规划体系,进一步引领中国旅游产业的转型升级和高质量发展。     

建立绿色包装系统的可行性研究报告

笔者从我国包装的现状分析入手，探讨建立绿色包装系统的可行性和必要性，提出建立绿色包装系统的具体措施和实施方案。     

气候政策研究中的数学模型评述

按照成本分析和综合分析2个层次，分别介绍了投入产出模型、可计算一般均衡模型、宏观计量经济模型、工程经济模型、动态能源优化模型、能源系统模拟模型、综合评估模型等不同模型方法的特点及其在气候政策分析中的应用。指出可计算一般均衡模型是应用得最为广泛的方法之一。概括了气候政策模型研究的4个发展趋势，包括加强综合评估模型的应用、扩展成本与效益的内涵、注重不同模型之间的比较、强调不确定性分析。结果中国研究现状，分析了当前面昨的问题，认为国内气候政策模型研究与中国在国际气候变化领域的地位仍不相称，强度要进一步加强研究队伍建设、扩展研究领域、跟踪国际研究前沿问题，以便为国家的气候谈判政策提供更有效的科学依据和决策支持。     

绿色化学浅议

绿色化学是更高层次的化学，其产生是为了避免或减少化学过程对人类健康和环境造成的危害，由此出现的技术是环境友好的技术。绿色化学的发展能节省资源、减少环境污染，并将成为可持续发展战略的核心内容之一。     

新型生活污水处理装置研究

介绍了新型生活污水处理装置的工艺 ,影响装置处理效果的主要因素。     

建立能够体现化工行业特点的行业排放标准初探

化工行业具有传统的工业类型和新兴产业交叉渗透的特点。现有的污染物排放标准因涵盖行业过多、细化内容不够、可操作性不强、行业特点不突出,故不太适应化工行业的发展,建立新的化工行业污染物排放标准势在必行。文章概要介绍了我国现有污染物排放标准,分析了美国、欧盟、日本、德国等一些国家和组织的排放标准,提议建立能够体现化工行业特点的行业排放标准,以达到淘汰落后工艺和促进清洁工艺的目的。     

餐饮泔水油及废动植物油下脚料深加工利用大有可为：介绍《国家级科技成果重点推广计划》高效益环保项目“利用餐饮泔水油及废动植物油生产油酸、甘油、硬脂酸”新工艺

综述了我国的餐饮泔水油及废油脂资源浪费、破坏环境现状，对比介绍了新工艺显著的经济及环保效益。     

发展绿色经济是21世纪的必要抉择

发展绿色经济是各个国家处理环境与发展关系，实现可持续发展的抉择。本文着重介绍了绿色经济的内容，主要包括绿色产业、绿色贸易、等。在发展绿色经济方面，我国已有一定认识并取得了较大成就，但和发达国家相比还存在较大差距，必须下大力迎头赶上。