秋雨绵绵走平遥

正豆叶黄,谷又熟。中秋节刚过,连绵的秋雨就至,被雨雾笼罩的乡野,无边无际地寂静,唯有雨脚在沙沙行走。戴着一顶斗笠,背着一个背篓,拿着一把银镰,从繁华的初秋走来,走过丰硕的中秋,向萧瑟的深秋走去,像一株老腰了的高粱。那秋雨的身影,伴随着我一路前行,直至消失在了那乡野的尽头。前方出现一座静穆的古城,雄浑壮阔的城垣,肃立挺拔的马面,绵延凸凹的女墙,昂扬高亢的城楼,一如既往的雄姿,哦,让我又见平遥。     

如果我是一只鸟

抬起头看灰蒙蒙的天空,浓厚的尘埃遮蔽了洁白的云彩。听说,在遥远的太古时代,天空也经常是灰蒙蒙的,可那是因为成群的飞鸟,阻挡了太阳的光线。而现在,寥寥无几的鸟儿,偶尔飞过天空,也是在急切的寻找巢穴。如果我是一只鸟,看到不再纯洁的天空,我会流下悲伤的眼泪。那曾经是我们天然的乐园,我和兄弟姐妹们在那里游荡嬉闹,有时会追着轻飘飘的云彩飞出好远,回来的     

携卷《诗经》走四方

在苇丛坐下,打开随身携带的《诗经》,翻到《秦风·蒹葭》。蒹葭丛中读《蒹葭》,真是亲切,就觉得是回到了诗的故乡,回到那个遥远而古老的年代。一有时候,就觉得,假日行走,若是随身携带一卷《诗经》,也许常常会在不经意间,就撞醒一个沉睡千年的美丽意象,闯进一片久蕴心头的奇妙意境,让你的旅行多一种诗意的愉悦和难以言表的快感。呱呱——唧啾,呱呱一一唧啾,……一串清脆的鸟呜,将您从酣睡中唤醒。睁开眼,窗前已是阳光灿烂。这是一个春天的假日,原计划要读读《诗经》的,何不到室外去读呢?于是操书出门,乘着和风,循着鸟声,不知不觉间,已来到一条河边。河心沙洲上,正有一对美丽的小鸟,相对而鸣。呱     

让美丽与我们同住

碧绿的草,巍峨的山,秀丽的河,五颜六色的花朵,洁白的云朵。与我们同行,与我们同住。怎么才能留住身边的美丽呢?首先,我们要植树造林。现在社会经济发展起来,就开始砍伐树木,盖高大的楼房。楼房虽然高大美丽,但还是不如树木重要,树为我们遮荫,为我们净化空气,为我们绿化世界。众所周知,以前翠绿的树林是鸟儿们安心的小窝,可这几年的树木越来越少,鸟儿也越来越少,新鲜的空气一去不复返了。     

小溪

在我童年的时候,家乡有一条长长的小溪,向南不知从何处流来,向北不知流向何处。就这样日日夜夜的流着。春秋冬夏,日出日落,唱着那只永不疲倦的歌。小溪边,留下了我童年的足迹,小溪里,洒下了我们童年的歌声,洒下了我们无尽的欢乐,我们无尽的情趣,我们无限的向往……     

过去 现在 未来

地球,曾经是多么美丽的地方:群山环绕,无数棵苍翠挺拔的大树驻守在这片广阔的土地上,小鸟在歌唱,鱼儿在嬉戏,成双成对的蝴蝶翩翩起舞,蜜蜂也在争奇斗艳的花朵中辛勤劳动。一切都是那么美好,充满活力,充满生机。当然,这是过去的地球。现在的地球,因为科技越来越发达,万丈高楼随着棵棵大树的倾倒拔地而起,小鸟没有了家园;波光     

一剪春韭香

"夜雨剪春韭,新炊间黄粱"。沐浴着淅淅沥沥的春雨,剪下春天的第一茬韭菜,氤氲香色中鲜嫩无比,沁人心脾。杜甫的这首广为人知的诗句恬淡自然,清新隽永,既有生活的本真,亦有闲适的意趣,细细体味,我童年美食的味道跃然眼前。韭菜四季常绿,但春天的韭菜最为脆嫩鲜美,有"春菜第一美食"的美誉。每年的阳春时节,嫩嫩的韭菜,就成为我家餐桌上必不可少的美食。我爱吃韭菜,尤爱吃早春时割下的头刀韭菜,其味醇香馥郁,无论是焯水后凉拌,还是做春卷,炒鸡蛋,烙盒子,包饺子,都是香味怡人,     

根河之恋

正如果是春天,根河会从厚厚的冰层中泛起春潮,河的生命力会巨大地进发开来,它推去坚冰,欢快地伸晨腰肢,向远方而去。与大兴安岭公路同行的是那条流动着的根河,它像一个信心满满的情人,紧紧相依相随,时而弯曲,时而浩荡,时而又隐入葱茏的绿树丛中,豪迈、率真、娇羞,兼而有之。让人诧异的是,河水看上去竟然是黑的,醇厚地放着光,就如皮肤黝黑的     

一场特殊的官司

这是一场特殊的官司,是在分界小学东侧的一条河边进行的。河岸上,醒目地写着这样一句警示的标语:停电了,蜡烛可以给你带来光明;道理不通了,可以另辟新径;水污染了,水没有了,什么可以替代?这一天,观者如堵。几经打听才得知,原告是小河,法官是大自然,而被告,竟是主宰大自然的人类!在低缓的乐曲声中,小河开始了它声泪俱下的诉述——"我曾经很美很美,绿得像一块无瑕的翡翠,清得像一面硕大的明镜,静得像一位文雅的少女。我哺育了两岸的几代人,他们到我腹中淘米、洗衣、洗澡、玩仗,我的身     

“绿色”将消失的颜色

绿色,代表希望,我们生活在美丽的大自然中,我爱绿色,爱那高大的绿色,爱那温柔的绿草,向往广阔无边的绿色草原,有活泼的小鹿与清澈的小溪陪伴。我的思绪渐渐的来到了几万年前的原始丛林中,四周静静的,不时有着绿叶伴随着清风掠"呼啦"的过我的头顶。我慢慢的闭上了眼睛,静静地听,仿佛是一位音乐家演奏着美妙的乐曲。伴随着青草与露珠的芳香,我深深的,深深的陶醉了,醉了……"嘟……!"一阵汽车喇叭声把我从人间仙境拉回了人间"地狱"。我拍了一下脑袋,定了定神,爬起床,眼前的日历:2022年1月17日。"嘟……嘟嘟……!"又是一阵刺耳的喇叭声传入耳朵。我厌恶     

快速杀灭紫茎泽兰的新技术研究

主要针对外来入侵植物紫茎泽兰的快速杀灭新技术进行研究。利用植物对某些营养元素的敏感性特点,研制出紫茎泽兰专用生长抑制剂。采用喷洒紫茎泽兰生长抑制剂的方式,达到抑制紫茎泽兰生长直至杀灭的目的,以及采用在原地种植替代植物的方式防止土地再次被紫茎泽兰侵占。     

利州区农产品基地土壤重金属污染评价

运用指数法对利州区农产品基地土壤重金属污染进行分析评价,并尝试运用聚类法对重金属进行了聚类分析和污染源推测。从单项污染指数来看,利州区农产品基地8个采样点中所有点元素均不超标。土壤中重金属元素平均单项污染指数由高到低依次为:AsHgCdCuCrPb,其中最高值为As,其值为0.42,可知农产品基地土壤中重金属平均单项污染指数均小于1。从上可以说明该基地的重金属含量受人为影响已在土壤中有所积累,但是总体状况良好。从综合污染指数来看,土壤中重金属平均内梅罗综合污染指数为0.31,其值小于1,属于清洁水平,适合发展有机食品和发展无公害食品生产。聚类分析法得出Pb和Hg的相关系数最大,其值为0.72。说明两者之间具有强正相关性,它们的含量会同时出现增减变化,而Cd和Cu的相关系数为-0.705,说明两者之间是有此消彼长相互抑制的关系。     

东洞庭湖世界涉危鸟类多样性的分析研究

为了探讨湿地自然保护区综合措施的实施对鸟类多类性的影响,本文分析比较了东洞庭湖自1992年加入国际《湿地公约》后,在1992-1996年间世界濒危鸟类多样性的动态变化。自1992年加入国际《湿地公约》后,尽管对洞庭湖湿地及其内栖息的生物采取了诸多保护措施,但仍发现世界濒危鸟类多样性的值并未如人们所期望迅速有所回升,而是呈弱递减趋势。东洞庭湖湿地的世界濒危鸟类多样性大小状况为:1992-1993>1993-1994>1994-1995>1995-1996。因为湿地环境的客观改善勿容质疑,为此得出结论:鸟类多样性的恢复存在滞缓期。并且作者对退化湿地生态系统的恢复途径进行了讨论,提出合理化建议:(1)应该根据湿地演替的规律进行认为辅助演替。(2)保证湿地环境的稳定性,增加净生产力,使鸟类的基础饵料丰富充足。     

An Investigation of Thermal Decomposition Behavior of Hazelnut Shells

Turkey has a drastic potential in terms of biomass energy and it would be of utmost importance for our energy mix if this huge amount of energy is to be utilized. Thermochemical conversion is the most dominant one among the energy conversion processes. The carbonization process is the key point in determining the kinetic parameters of the fuels utilized. Thereafter, the kinetic parameters obtained from carbonization would be utilized in designing the thermochemical conversion equipments. In this study, the thermal decomposition behavior of hazelnut shells was investigated via dynamical thermogravimetry (TG) under N₂ atmosphere. In order to determine the effects of heating rate and gas flow rate, the experiments were performed in four different heating rates of 5, 20, 50, and 100 K/min and two different nitrogen flow rates of 50 and 100 cm³/min. As the heating rate was increased, peak temperature was increased, maximum temperature shifted to the right (higher T zones) and the maximum rate of weight loss was increased. In addition, lignin decomposition temperature interval was decreased whereas; cellulose decomposition temperature interval was increased. Increasing the heating rate from 5 to 20 K/min, hemicellulose decomposition temperature interval was increased. Total weight loss was slightly increased by the increase of gas flow rate. Kinetic parameters were calculated according to Coats Redfern method. It was found that activation energies of thermal decomposition reactions of hazelnut shell varied between 1.30 and 32.19 kJ/mol.     

Impact of education on the attitudes of college students toward biotechnology

An interdisciplinary course was designed as an introduction to the applications of, and the socio-economic issues associated with, biotechnology. College students enrolled in the course were surveyed prior to the first formal lecture, and again upon completion of the course. Assessment was made of the impact of the educational materials on the attitudes and perceptions of the students toward the applications of biotechnology to agriculture. Data were collected for the first three semesters in which the course was offered. Answers to survey questions were analyzed on a before and after basis. It was found that students were very accepting of biotechnology prior to taking the course, despite a generally low level of exposure to this type of technology. The course was effective in increasing the knowledge base of the students, but not as effective in allaying their perceptions of risks associated with biotechnology.     

High consumption of pesticides in agricultural fields leads to prevalence of cancer cases in rural pockets of eastern India: A case study

This study was performed to evaluate the carcinogenic health risk of pesticides used in agricultural field in rural pockets of eastern India. The analysis of pesticide residue in rice grain sample was performed by Gas Chromatography Mass Spectrometry (GC-MS). It was observed that for pesticide DDT, the HR values was ranging between 0.5 to 3.2 and for lindane HR was 0.4 to 1.1, respectively. The DDT and Lindane exhibited HR values >1 in some sampling sites which revealed the carcinogenic effects and HR <1 in some sampling sites which revealed non carcinogenic effects of same pesticide. These results revealed a clear indication of potential carcinogenic health risk to human health through consumption of contaminated rice in some areas of Bargarh district. DDT has a long half-life, so it persists in the environment for a longer period of time and induces carcinogenic risk to human health predominantly than other pesticide lindane. A case study on cancer prevalence in Bargarh district was also carried out to support the findings of quantitative analysis. The primary data collected from the cancer affected area by personal questionnaires method to the person concern and the secondary data collected from the Bargarh District Head Quarters Hospital's register. The cancer death reported by the from the year 2015 to 2021 was 320, 380, 293, 323, 278, 409, 346 in the year of 2015, 2016, 2017, 2018, 2019, 2020, 2021 respectively, with the total number of 2349 cases. From the questionnaire data, it was observed that the occurrence of male and female cancer cases was 51.75% and 48.25%, respectively. Therefore, it was concluded that there was no significant difference in gender wise cancer prevalence. The most affected age group was 51–60, that is, 26.92% followed by 41–50, that is, 23.42%. Therefore, it was concluded that the middle-aged adults (40–60) were more vulnerable to the cancer than young adults (3–40) and old adults (60–100). The most prevalent cancer was breast (22.72%) followed by stomach (14.33%).     

The feasibility of decontamination of reduced saline sediments from copper using the electrokinetic process

The remediation of metal contamination in estuarine and reduced sediments is another challenge for the electrokinetic process. Problems result from the complex chemical composition of saline reduced sediments. In the experiments described here copper was added into saline reduced sediments to simulate the natural situation. Two constant voltages were applied across the electrokinetic cell to investigate the effect of an increase in potential difference on the electrokinetic process. Acetic acid at pH 6 and 4 was also added to the cathode in separate experiments to enhance copper removal. The results from this study showed that in the unenhanced experiments most of copper remained in the soil and was unaffected by the electrokinetic process. At the end of unenhanced electrokinetic experiments, the copper concentration was found only to be slightly changed in the anode region. Up to 21% of the copper was found precipitated near the anode when the applied voltage was 10V and this increased to 25% when the applied voltage was 7V. In the enhanced electrokinetic experiments up to 98% of copper was removed from section 1 and precipitated again in sections 2 and 3. This indicates that a significant amount copper removal from the saline sediments may be achieved by the enhanced electrokinetic process.     

基于边际效应理论的中部板块协调发展分析

边际效应理论及其增值效应是现代生态科学很重要的一个原理.我国是典型的经济发展不平衡的国家,长期的区域非均衡战略在全国范围内形成了四大区域板块.面对着东部的开放崛起,西部大开发和东北老工业基地的改造,"谨防中部凹陷,促进中部崛起"作为一个区域协调发展的重大命题,被提到了国家层面上.中部板块由于地理区位与经济发展水平均居于我国的中间位置,因此具有明显的过渡性.作者试图通过运用生态学上的边际效应理论,分析中部区域板块内部以及板块之间的区域经济协调发展机制,来促进中部区域板块经济的协调发展.     

矿区复垦土地的评价方法

建立了一套适合矿区复垦土地评价的指标体系，提出了先对复垦土地的环境质量进行评价，当环境质量达标时再对其进行综合评价的思路。详细分析了各因子作用分值与作物产量的关系，根据因子的不同情况采取了不同的计算分值的方法，分别计算了当地正常农田的质量总分值以及复垦土地的总分值，并对两者进行了比较。     

济南市可持续发展状况评价研究

构建了济南市可持续发展指标体系,对济南市1999—2004年的可持续发展状况进行了评价分析,发现济南市在2002年以前可持续发展保持较好;2002年以后经济继续保持较快发展,但资源环境指数和社会发展指数出现下滑趋势,社会发展和环境改善未能与经济的发展保持同步,可持续发展出现出一定程度的不协调,并对济南市的可持续发展提出了对策和建议。