试论黄淮海地区的自然资源及国家级作物商品基地的建设

根据中国主要农业区——黄淮海地区的自然和社会经济条件,分析了该区小麦、玉米、大豆、棉花等在气候-土壤生态适应性的基础上,采用逐级生产力估算方法,计算出四大作物的商品量,论证了该地区建设为全国性四大作物商品基地的可能性。     

AJS-2粉体静电消除器在本体法聚丙烯装置上的应用

静电是本体法聚丙烯生产和包装过程中的安全隐患.文中介绍了新型AJS-2粉体静电消除器的组成、基本原理及特点,并将南阳石蜡精细化工厂聚丙烯装置加装粉体静电消除器后在开机前后所测静电电位做对比,并与国标对照,说明加装粉体静电消除器后,大大提高了聚丙烯装置的安全性,消除了安全隐患.     

Consumer response to integrated pest management and certification

This study investigated consumer awareness of integrated pest management (IPM) and the effects of two marketing strategies. Specific objectives were to find whether eastern Massachusetts farmstand and farmers' market customers purchasing sweet corn care how their food is grown, whether they are aware of IPM, whether they would prefer to buy IPM-certified sweet corn and why, and whether the marketing methods presently available to IPM-certified growers can enhance awareness of IPM. In 1993, the Massachusetts Department of Food and Agriculture in collaboration with the IPM Program at the University of Massachusetts began a pilot IPM certification program for sweet corn and strawberries, designated ‘Partners with Nature’ (PWN). This study compared a ‘passive’ and ‘active’ PWN marketing strategy with a control that did not have any PWN publicity. The passive strategy was simply display of a PWN certificate and poster. The active strategy also included newspaper advertisements, clear labeling of corn as IPM-certified at the point of selection, a PWN sticker placed on bags of corn at payment, personally thanking customers for ‘buying our IPM-certified sweet corn’, and IPM brochures available to customers. Thirty purchasers of IPM-grown corn were interviewed at each of six farmstands and six farmers' markets.The dominant reason why customers patronize farmstands and farmers' markets was convenience. As found by other northeastern surveys, awareness of IPM was low: only 19% had heard of IPM before the survey, and only 38% of these could mention a specific method used in IPM. Although 45% of the respondents initially said that they did not care how their food is grown, 85% said that they would prefer to buy IPM-certified sweet corn after hearing a short definition. The definition gave only environmental benefits, but 74% of the customers preferring IPM-certified corn said they would buy it because it is safer or healthier. Most of the respondents claimed that they would be willing to pay 10% more for IPM-certified corn. Simply displaying an IPM poster had no significant results on consumer preference for IPM-grown produce, but active marketing significantly raised awareness of IPM and the PWN program.This study demonstrated the willingness of customers to support IPM because they believe it will have positive consequences for human health and environmental quality. It is concluded that sweet corn marketing based on IPM certification positively influenced consumer reactions to IPM; and a more extensive, diverse marketing strategy would enhance consumer awareness and support.     

二氧化硫对作物游离氨基酸浓度的作用

观察了四种作物接触二氧化硫后游离氨基酸,特别是十种昆虫必需氨基酸含量的变化.二氧化硫引起油菜、大豆和小麦叶片中昆虫必需氨基酸浓度明显增加,非必需氨基酸中,增加或减少趋势不一.玉米没有这种反应.二氧化硫熏气的大豆上叶螨生长繁殖快于对照.讨论了植物中氨基酸浓度的增加和大气污染诱发虫害加剧的关系.     

废混凝土粉在建筑砂浆中的应用研究

研究了废混凝土粉以不同取代率取代建筑砂浆中的天然砂对砂浆的和易性及强度的影响 ,结果表明 ,废混凝土粉可以取代建筑砂浆中的部分天然砂配制再生骨料砂浆。     

粉煤灰和高铁酸钾联合处理造纸废水的研究

通过实验研究得到采用酸化后的粉煤灰与高铁酸钾联合处理造纸废水,可使废水达到排放标准。     

金属静电粉末喷涂清洁生产途径探讨

清洁生产作为防治污染的最佳模式,是实现可持续发展和循环经济的必由之路.根据目前金属静电粉末喷涂典型生产工艺流程,分析其产污环节及污染物排放情况,并从原料、工艺和设备出发,探讨金属静电喷涂的清洁生产途径,以减少静电喷涂过程污染物排放对环境和生态的影响.     

钢板酸洗液回收Fe2O3粉制取高档永磁铁氧体预烧料的研究

以钢板酸洗废酸液回收的Fe2O3粉为主要原料，制备了永磁铁氧体预烧料及器件。研究了工艺制度如预烧温度、保温时间、摩尔比对预烧料磁学性能的影响等。制取的永磁铁氧体材料的磁性能达到Br=420mT，Hcb=215KA／m，（BH）max=32．4KJ／m^3。     

Prenatal assessment of anterior abdominal wall defects and their prognosis

Eighty-eight cases of abdominal wall defect with and without other lesions were ascertained by reviewing all labour room records in the West of Scotland, all surgical admissions to the Royal Hospital for Sick Children, Yorkhill, and all post mortems at Royal Hospital for Sick Children between 1978 and 1981. The affected cases comprised 39 terminations of pregnancy (17 of anterior abdominal wall defect without neural tube defect). 20 spontaneous stillbirths and 29 livebirths. All 10 cases of body stalk anomaly, 37.5 per cent of 16 gastroschisis cases and 53 per cent of 62 exomphalos cases had additional severe abnormalities. Abnormal karyotypes were present in seven out of 19 exomphalos cases but all karyotypes from 10 gastroschisis and 6 body stalk anomaly cases were normal. No correlation was found between the maternal serum AFP levels, the amniotic AFP levels and acetylcholinesterase results and the size of the lesion. It is proposed that anterior abdominal wall defects detected prenatally should have chromosome analysis and careful ultrasound to exclude associated severe anomalies before coming to a decision about termination. This policy was implemented in six pregnancies complicated by fetal gastroschisis without severe associated anomalies which were identified in the second trimester and continued to term. Immediate surgical repair was achieved in each case, although two of the infants succumbed from later complications of gastroschisis closure and one from respiratory distress syndrome. The remaining three infants made a satisfactory recovery.     

甘肃省玉米产量的气候特征及其与中国大陆OLR的关系研究

对甘肃省５５个站点的玉米气候产量经ＥＯＦ及ＲＥＯＦ分解后，通过对其载荷量的分析，表明陇东南地区是甘肃省玉米产量最具代表性的区域，并进一步将甘肃省玉米气候产量划分为５个自然气候区：陇东区、陇南区、中部及阴湿山区、干旱山区、河西灌溉农业区。玉米气候产量的第一主分量可代表甘肃省玉米气候产量的时间趋势。它与同年５～９月份ＯＬＲ有很好的相关关系。