Static Rope Rescue Operations in Western Norway: A Retrospective Analysis of 141 Missions     

《The Forestry Chronicle》2022,33(2):162-168

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远程监测技术在港口气体污染物监测中的应用研究     

陈秋燕  李晓波  李珂  赵淑媛 《绿色科技》2021,(6):72-74

对青岛前湾港进行实地考察,确定了港口监测设备布点位置,通过试验验证,论证了监测设备距船舶的距离、风向与船舶航行的测试夹角、湿度、环境温度等参数对港口船舶运行过程中烟气扩散测试结果的影响,同时,确定了影响船舶气态污染物监测的关键因素,为在我国港口搭建船舶排放监测系统提供一些参考。  相似文献   

室内空气品质归类综合评价     

彭明江  吉牛么日作  沙马乌合  黄丹  钟磊 《绿色科技》2021,(6):91-93

由于室内空气环境是重要的基础生活环境,室内空气品质与人群健康密切相关,科学评价室内空气品质对于保护人群健康具有重要意义。但目前室内空气品质评价在评价要素选择和评价方式上各有不同。基于此,针对室内空气品质提出了一种归类综合评价方式,较为全面地涵盖和整合了评价要素,对室内空气品质的有效评价和改善有一定参考价值。  相似文献   

大庆石油化工大气污染对几种大豆幼苗的伤害初探   总被引：2，自引：0，他引：2  

赫延龄  郑蔚虹 《大豆科学》1997,16(2):143-148

用大庆石油化工（以下称石化）污染大气，对四个品种大豆幼苗进行熏气处理试验的结果可见，叶片浸液的电导率和Ｋ＾＋外渗率都明显增大；叶片叶绿素、可溶性糖、蛋白质和核酸的含量却显著下降；过氧化物酶同工酶的含量的和活性升高。这表明石化大气污染对大豆幼苗具有伤害作用。但是，不同品种的大豆幼苗对其伤害的反应不同，所测试的四个品种大豆中，合丰２５和嫩丰４抗性较强，而黑河５和嫩丰１１则抗性较弱。这为石化大气污染对植  相似文献   

基于主成分分析南京空气污染各成分的关系     

贺永平 《绿色科技》2014,(4):255-257

根据从南京9个空气环境监测站所得到的空气污染物数据,在空气各成分的相关性指标中,运用主成分分析法,对各个监测样本各个特征性指标进行了分类分析,结果表明：占总方差的79．038％的3个因子来反映空气污染的总体程度,这3个因子归类分别为：①NO2、03、032和SO2,②AQI和03,③PM10和CO。有主成分分析法可以准确地探讨出空气各污染指数准确的内在关系,为当下的环境治理提供一些参考和帮助。  相似文献   

Recent developments and improvements in ornamental fish packaging systems for air transport   总被引：3，自引：1，他引：3  

Lian Chuan Lim  Philippe Dhert  & Patrick Sorgeloos 《Aquaculture Research》2003,34(11):923-935

Current ornamental fish packaging systems are characterized by very high fish loading densities and high metabolic wastes in the transport water after shipment. They focus mainly on management of the quality of transport water. Recent studies using the guppy as a model fish showed that post‐shipment mortality could be reduced through enhancement of the stress resistance of the fish, and hence emphases should also be placed on the preparation of the fish for transport and recovery of the fish after shipment. Farmers can contribute significantly by applying nutritional prophylaxis before harvesting. Exporters may use the salinity stress test to identify fish lots of good quality for transport, apply health prophylaxis to eradicate parasites and optimize other techniques such as starvation of the fish or addition of salt to the transport water to enhance the stress resistance of the fish. Importers may adopt proper acclimation procedure and allow fish to recover in low salinity water to reduce post‐shipment mortality. As the main bulk of post‐shipment mortality is stress‐mediated and occurs during the 1‐week recovery period, the industry should consider revising the basis of the current warranty system for their customers, from death on arrival to cumulative mortality at 7 days post shipment (or death after 7 days, DA7), in order to cut down fish losses after shipment.  相似文献   

高级别动物生物安全实验室气密性的探讨     

严春炎  李正武 《中国兽药杂志》2014,48(9):57-60

高级别动物生物安全实验室气密性是保证实验室空气洁净度、室内实验人员和室外环境安全的重要手段。我国现行规范对高级别动物生物实验室各区域气密性有严格的规定。从实验室装修、围护结构设备安装以及气密性检测方面对实验室气密性进行了讨论,以期为我国高级别动物生物安全实验室的建设提供参考。  相似文献   

浙北黑木耳大棚栽培与露地栽培对比分析     

蔡雪涛  杜云昌  杨治明 《中国食用菌》2014,(3):23+26-23,26

大棚栽培桑木耳试验成果显示,在大棚中排场,可有效提高产量和效益,12月5日大棚内排场产量极显著高于11月5日露地排场和12月5日露地排场的,拉长了桑木耳制棒时间,有利于规模化、合作社化生产。  相似文献   

Effects of mechanical stress in under-sized clams, Tapes philippinarum: a laboratory approach     

M.G. Marin  V. Moschino  F. Meneghetti  L. Da Ros 《Aquaculture International》2005,13(1-2):75-88

The present study is a first attempt at evaluating the effects of repeated disturbance, such as that caused by mechanical fishing systems, on the target species, Tapes philippinarum, intensively exploited in the Lagoon of Venice (North-East Italy). In particular, in free-access fishing grounds, detrimental effects of dredging may be suffered by under-sized clams, which are disturbed by fishing tools many times throughout their lives before they are collected. Similar mechanical stress conditions are experienced by T. philippinarum in licensed areas, where they are farmed in aquaculture conditions and undergo the harmful impact of hydraulic dredging. To evaluate the effects of short-term mechanical stress, under-sized clams were subjected to experimental shaking in the laboratory, and detrimental effects on their well-being were investigated by applying the biomarker approach. Changes in physiological, biochemical and behavioural responses were evaluated by determining scope for growth, adenylate energy charge, survival in air time, reburrowing time, and shell damage level. Responses highlighted general worsening in clam condition as mechanical stress increased. Among the various measurements, survival in air and reburrowing time appeared particularly suitable as indices, their responsiveness and applicability suggesting their use in assessing mechanical stress due to dredging in field conditions.  相似文献   

Gastric dilation and air sacculitis in farmed chinook salmon, Oncorhynchus tshawytscha (Walbaum)     

J S Lumsden  P Clark  S Hawthorn  M Minamikawa  S G Fenwick  M Haycock  & B Wybourne 《Journal of fish diseases》2002,25(3):155-163

A syndrome affecting cultured chinook salmon, Oncorhynchus tshawytscha (Walbaum), characterized by distended abdomens, gastric dilation, air sacculitis (GDAS), increased feed conversion rates and increased mortality has been recognized in New Zealand. Affected fish were most obvious in sea cages but were also present in fresh water. Mortality rates associated with this condition were highest in late summer and approached 6% per month. A dilated and flaccid stomach, without visible rugal folds containing copious oil, watery fluid or undigested feed was typical. Gastric mucosal ulceration or inflammation were not present. The air sacculitis consisted of a thickened, dilated bladder with a mixed mucosal inflammatory infiltrate and a luminal exudate associated with large numbers of morphologically diverse bacteria. Gastric dilation or air sacculitis occurred alone or together in the same fish. In a group of 20 subclinically affected fish with or without gastric dilation, there were no significant differences in weight, length, serum osmolality, sodium, total protein or packed cell volume. Twenty-three severely affected fish had significantly ( P  < 0.05) higher serum osmolality but similar sodium and total protein to that of clinically normal fish.  相似文献