山东省荣成海区潮间带鼠尾藻生长及其化学组分的季节性变化

为研究山东省荣成海区野生鼠尾藻Sargassum thunbergii生长及化学组分的季节性变化,于2016年3、6、10、12月大潮期间采集鼠尾藻样品,并对其长度、生物量和化学组分进行测定。结果表明:潮间带鼠尾藻在5—7月生长最快,同一时期中低潮位的鼠尾藻长度和生物量比较大;鼠尾藻蛋白质和灰分含量较高且随季节变化;鼠尾藻中褐藻胶含量变化范围为20.30%～33.02%,在生长速度较快的6月其含量较高且显著高于3月和12月(P<0.05);而鼠尾藻中岩藻黄素含量变化趋势正好相反,6月其含量较低且显著低于12月(P<0.05);鼠尾藻中褐藻多酚含量变化范围为0.32%～3.82%,3月褐藻多酚含量最高。研究表明,月份变化对鼠尾藻的褐藻胶、岩藻黄素、褐藻多酚含量的影响大于潮位的影响,本试验结果可为鼠尾藻活性成分制备提供参考。     

记山东荣成民居——海草房

在美丽富饶的胶东半岛,有一个以盛产将军闻名的县级城市——荣成市。荣成市位于山东半岛的最东端,因其所辖成山头镇的海岸是中国的最东头,所以又称“天尽头”。荣成市三面环海,海岸线长约500公里,总面积1392平方公里,辖26个镇,4个省级开发区和贸易区,908个行政村,共68.3万人。此地夏天多降水,冬季则海风凛冽。特殊的地理环境和气候条件形成了荣成市独特的民居形式——海草房。漫步在海边的小渔村里,街道狭窄弯曲,高低不平,一座座形似驼峰的海草房鳞次栉比,连绵起伏,在碧海蓝天的映衬下宛若驼群在沙海上奔腾。柔软的海草屋顶和坚硬粗犷的花岗…     

重金属镉对铜藻生长及其生物活性成分积累的影响

为研究水体重金属污染对经济海藻的生长和品质造成的严重影响,以经济褐藻铜藻Sargassum horneri为研究对象,在温度为15℃的条件下,研究了由Cd Cl2·2.5H2O配制不同浓度(0、0.1、0.5、1.0、5.0 mg/L)的重金属镉胁迫对铜藻生长、光合色素、可溶性糖、可溶性蛋白等生理生化指标,以及对生物活性成分(岩藻黄素、褐藻胶和褐藻多酚)积累的影响。结果表明:对照组藻体的特定生长率(SGR)在15 d内持续升高,0.1、0.5 mg/L Cd处理组的SGR在试验前10 d内逐渐升高,然后保持稳定至第15天,1.0 mg/L处理组的SGR随着培养时间的延长呈波动变化状态,而5.0 mg/L处理组的SGR呈先升高后降低的趋势;藻体的各项生理生化指标随胁迫时间呈不同的变化趋势,但在试验第15天时,各胁迫组藻体的叶绿素a、类胡萝卜素和可溶性蛋白含量均显著低于对照组(P<0.05),而可溶性糖含量则显著高于对照组(P<0.05);铜藻的岩藻黄素和褐藻多酚含量在不同浓度的Cd胁迫下均有极大程度的下降,且Cd胁迫浓度越高,降幅越大,而褐藻胶含量在Cd浓度≤0.5 mg/L胁迫下未有显著变化(P>0.05),在Cd≥1.0mg/L时显著下降(P<0.05)。研究表明,在铜藻产业化开发应用过程中,其养殖海域的重金属污染是需要考虑的重要因素。     

国土空间脆弱性评价及优化策略--以山东省荣成市为例

脆弱性研究是全球环境变化及可持续发展研究领域一个新的研究范式。文章以国土空间为研究对象,构建了"生态保护-农业生产-城镇建设"三种功能导向、"压力-敏感性-应对能力"三个层面的国土空间脆弱性研究框架,加强了综合集成方法在脆弱性评价中的应用。随后,以山东省荣成市为实证案例,通过识别不同功能导向下国土空间脆弱性高和较高的区域,分析导致脆弱性的原因,从减缓压力、降低敏感性和提升应对能力三个角度提出应对策略,以促进国土空间治理能力的提升。     

Discoloration and fungal growth on three fiber cement formulations exposed in urban,rural and coastal zones

Three formulations of fiber cement were evaluated for fungal colonization and color change after five years of exposure in aging stations located in urban (São Paulo), rural (Pirassununga) and coastal (Rio Grande) zones in Brazil. The lowest color change and fungal colonization were registered in Rio Grande, which has a temperate climate, as opposed to São Paulo and Pirassununga, which are tropical. The highest fungal colonization was recorded in São Paulo, one of the most air polluted cities in Brazil. Pirassununga samples had an intermediate fungal colonization, in spite of showing the highest color change with visible dark spots on the surfaces. These spots were identified as cyanobacteria, which significantly contributed to the darkening of the specimens. The fiber cement formulation, varying in proportion of organic fibers such as poly (vinyl alcohol) and cellulose, was less significant for fungal bioreceptivity than the characteristics of the exposure site. The most frequent fungal genus found in the tropical climate, in both urban and rural zones, and the main one responsible for the higher records in São Paulo, was Scytalidium sp. which was registered for the first time on this building material in Brazil.     

鹤舞祥云 人间仙境——山东东营仙河镇掠影蔡红

引子　　　　“黄河之水天上来,奔流到海不复回。”浩浩荡荡的黄河奔腾万里,终于在这里——山东东营投入了大海的怀抱。　　　　仙河镇就紧锁在黄河口。历史上,桀骜不驯的黄河曾多次改道。建国初期,这里一度成为黄河主河道。1964年初,黄河改由邻乡入海后,这里形成了一处无潮区,涨潮不见水深,落潮不露海滩,不论海上有多大风浪,这条故河道都是风平浪静,因而被渔民称为“神仙沟”。也许,这是天上来的黄河在融入大海时,留下来的最后仙姿。　　　　1987年,中顾委委员林呼加来视察时,见这里被神仙沟与槐树林环抱,水如丝带,枝影横斜,似人间仙境,建…     

山东省HRB400级钢筋的研制与开发

简要介绍山东省HRB400级钢筋的研制及推广应用,高强度钢筋新品种的开发研制。     

Occurrence and seasonal variations of Giardia in wastewater and river water from Al-Jinderiyah region in Latakia,Syria

ABSTRACT

This study investigates the occurrence and concentration of Giardia cysts in wastewater and river water samples in Al-Jinderiyah region, Latakia, Syria. A total of 120 samples were collected between October 2016 and October 2017 from influent and effluent of Al-Jinderiyah Waste Water Treatment Plant (WWTP) and from three contaminated river water sites. Samples were concentrated and subjected to microscopic examination. The results show that the concentrations of cysts ranged from 0 to 297 cysts/L in wastewater samples. The overall removal efficiency of cysts in the activated sludge WWTP was 84.35%. The concentrations of cysts ranged from 0 to 128.52 cysts/L in river water samples. The highest concentration in river water was recorded near the raw wastewater discharge point. Seasonal variations of Giardia cysts concentration were significant, and the highest concentrations were recorded in the rainy season. The results suggest that Giardia may pose a public health risk in the studied region.     

山东省五莲县膨胀土分布特征及处理措施分析

膨胀土(expansivesoil)属于失水收缩,吸水膨胀的高塑性粘土,如果处理不当,较容易出现事故,其危害早已引起我国专家的高度重视。我国的膨胀土分布广泛,是世界分布面积最大的国家之一。居住于膨胀土分布区的人口达3亿之多,膨胀土给居民带来的地质灾害问题也不在少数;天然状态下膨胀土多呈灰黑色、黄褐色或灰色,潮湿状态下多呈黄色或灰黑色,具光泽。通常情况下膨胀土多处于坚硬或硬塑的状态,强度相对较高,将住宅建于膨胀土分布区之上其后果可想而知。对五莲县的膨胀土的危害进行分析,力求保证当地人们群众的生命财产安全。     

Decadal and seasonal scale changes of an artificial lake environment after blocking tidal flows in the Yeongsan Estuary region, Korea

Artificial lakes, initially built in estuaries for positive purposes such as flood prevention and providing irrigation water, have been found to have negative impacts including blocking tidal cycles, disappearance of brackish water zones, sediment increase, water pollution, change of microbial diversity inhabiting patterns, and a decline in fish diversity. In this study, multidisciplinary field studies including physical, chemical, and biological analyses were performed to demonstrate decadal and seasonal scale changes in the ecological environment in Yeongsan Reservoir (YSR), Korea, since the construction of a 4.35 km-long dam in 1981. The results of the study show that the volume of sediment accumulated in YSR was 75.2 million m³ since the dam was constructed, resulting in a 33.6% reduction of the total water storage capacity. Also, water quality in YSR was affected by complex physico-chemical and hydrological phenomena, including saline and thermal stratifications, and pollutant loadings leading to eutrophication. Subsequent sediment bacteria analyses showed microbial diversity according to different depths in sediment, indicating the environmental change of sediment ecology. Moreover, the fish diversity in this study (2006–2007) was found to be considerably reduced compared to a similar study in 1989 (42% reduction), and the ecological health was deemed to be in a “poor” condition based on the 10-metric Lentic Ecosystem Health Assessment (LEHA) model. Accordingly, these results indicate that aquatic ecosystems are detrimentally affected by estuarine dams that block tidal flows, and when applied to short/long-term management strategies for artificial lakes in estuaries, suggest that similar construction projects have to be suitably controlled.     

山东五莲七宝山长老庄隐爆角砾岩特征及其找矿指示

隐爆角砾岩是火山活动中,在地表封闭条件下发生剧烈爆炸所形成的碎屑岩建造,具有良好的热液成矿通道。五莲七宝山地区火山活动频繁,发育多期次火山杂岩体,形成七宝山火山机构。通过本次工作,在七宝山火山机构的南部,新发现长老庄隐爆角砾岩带,发现铜铅矿体1个,矿体呈脉状赋存在隐爆角砾岩带中,赋矿岩石为碳酸盐化、硅化、金属矿化隐爆角砾岩,矿体厚3 m,铜品位0.272%～0.823%,平均品位0.45%;铅品位0.240%～2.872%,平均品位为0.45%。通过对隐爆角砾岩带的地质特征综合分析,沿含矿角砾岩筒的通道相有可能追索到深部的斑岩型矿化。