Visual information for diagnoses of nutritional disorders in strawberry

(Jpn. J. Soil Sci.Plant Nutr., 77, 333–336, 2006)     

VB6.0和Surfer Automation技术开发土方量计算程序

用Visual Basic6.0引用Surfer软件开发实现了功能强大的土方量计算程序,满足了工程需要,有很好的应用效果。     

VB开发GIS系统中提高系统效率的方法

对GIS系统从设计到实施的各个环节进行研究，讨论了VB平台下GIS系统开发的软件运行效率问题。并结合经验，提供了优化的技巧。     

Visual C++与SuperMap的混合编程

在分析Visual C 与SuperMap各自优点的基础上,结合SuperMap Objects和GIS的特点,阐述了两者混合编程的开发方法,如图形的信息查询等问题.并强调了两者混合编程的注意事项.为利用SuperMap强大的图形图像处理能力,发挥C 语言的高执行效率,开发基于VG环境的组件式地理信息系统提供一点参考.     

Pre-harvest nitrogen and Azoxystrobin application enhances postharvest shelf-life in Butterhead lettuce

Two trials were carried out on Butterhead lettuce (March–May 2008 and April–June 2009) to investigate the effect of the application of nitrogen fertilizer (0, 50 and 100 kg ha⁻¹ of N) and of strobilurin (Azoxystrobin, methyl (E)-2-{2-[6-(2-cyanophenoxy)pyrimidin-4-yloxy]phenyl}-3-methoxyacrylate) on (i) yield and morphological traits at harvest, (ii) physical (weight loss and dry matter), visual (chlorophyll content and main colour indices), physiological (relative water content, osmotic potential, and electrolytic leakage), and nutritional (ascorbic acid, nitrate, and polyphenol content) quality of raw material and their changes after storage of fresh-cut leaves. Cool storage lasted 7 and 12 days in the first and second experiment, respectively. In the first cycle, under early-spring conditions, lettuce yield was lower by 38% and, even if the product was lighter coloured [higher L* (+6%) and lower CHL (−21%)], it had lower dry matter content (−32%), higher electrolyte leakage (EL) (+14%) and WL_Trans (+8%) compared with the raw product from the second cycle. In both years, the increase of N supply and the application of Azoxystrobin improved yield (by 8.5% and 10%, respectively). The response in N fertilization was more evident under early-spring (2008) compared to late-spring (2009) conditions (12.3% vs. 4.8%), and when (2008) the highest N rate interacted with the application of Azoxystrobin (+12.9% compared with the other treatments). The nitrate content in leaves was always reduced by Azoxystrobin application (−43%) and increased with the N supply (+53%). In the second experiment, when storage was prolonged for 12 days, strobilurin improved postharvest shelf-life by reducing chlorophyll degradation (−27%), senescence (−19%, measured as EL), and browning (−53%, measured as h° index decrease). Azoxystrobin lowered also the total polyphenol content of raw material (−12.5%), which can be linked to less browning during storage. During postharvest storage, irrespective to the preharvest dose, N supply kept the visual quality and physiological senescence indices constant (L*, h° and EL). The suitability of the Butterhead lettuce to fresh-cut processing depends on climatic growing conditions. Preharvest Azoxystrobin supply improves the nutritional quality of the raw material, reducing leaf nitrate content, and the shelf-life in prolonged storage. The N rate of 100 kg ha⁻¹ of N is suitable under less favourable growing conditions, while the rate of 50 kg ha⁻¹ is better for more favourable climatic conditions, especially if a moderate contribution in available N from soil organic matter mineralization and no leaching from heavy rains is expected.     

Research on landscape quality of country parks in Beijing as based on visual and audible senses

Construction of Chinese country parks has been developing quickly in recent years, but less effort has been made in the field of esthetic quantitative evaluation of landscape of the country parks. Based on the theories of landscape esthetics and psychology, this paper constructs a landscape quality evaluation model for the country parks by means of SBE and SD methods, with which the authors of the paper carried out the research on and evaluation of the landscape quality of four selected country parks outside the Fifth Ring Road in Beijing. The purpose of this paper is to further put forward suggestions for a better development of the landscape of the four country parks in order to bring their landscape and recreation functions into full play. The findings of this paper indicate that both natural and artificial landscape characteristics exercise either positive or negative influences on landscape quality; among them the effect of vitality, color richness, senses of both joy and beauty are the key elements affecting the attraction of the country park's landscape. Country parks boast with special significance because of their localism, naturalness and tranquility. These advantages are fully shown in their sufficient space for waterscape construction and conspicuous effect on landscape as reflected from the green belts previously constructed. Nevertheless, three major problems existed in the country parks including insipid color, over artificialized parkways, and peripheral high-rise buildings in the nearby neighborhood that have also given rise to visual interference. Recommendations for relevant landscape construction and protection of the country parks are suggested.     

Physiological effects in humans induced by the visual stimulation of room interiors with different wood quantities

To clarify the visual effects of room interior with wooden materials on humans, pulse rate, blood pressure, and brain activity were measured while the subjects were exposed to visual stimuli using actual-size model rooms. The wood ratios (the ratio of the area covered with wooden material to the whole area of the ceiling, walls, and floor) of the rooms were 0%, 45%, and 90%. Subjective evaluation was also conducted. In the 0% room, diastolic blood pressure decreased significantly, but the observed change in the autonomic nervous activity was relatively small. In the 45% room, a significant decrease in the diastolic blood pressure and a significant increase in pulse rate were observed. This room tended to have the highest scores in subjective “comfortable” feeling. The 90% room caused significant and large decreases in systolic blood pressure and diastolic blood pressure at the beginning of the test, but the large coverage of wood appeared to cause a rapid decrease in brain activity and an increase in pulse rate. The present study demonstrated that a difference in wood ratio in the interior caused different physiological responses, especially in the autonomic nervous activity, by using actual-size rooms for the first time.     

天仙果果胶提取条件及含量测定

以天仙果果实为原料采取盐酸溶液萃取、酒精沉析制取果胶;确定最佳提取工艺条件为提取温度87~90℃、pH 0.5~1.0、萃取时间2h、料液比1∶20。研究了亚硫酸氢钠对天仙果果胶得率的影响;用咔唑比色法对其含量进行了准确测定。     

城市道路绿地植物管理系统

城市道路绿地植物管理系统可方便地查询到城市道路上木本植物的生长现状，为城市道路绿地植物管理者提供可靠的管理依据。系统运用了可视化语言Visual Basic6．0，数据库管理系统采用了Microsoft SQL2000编写。     

苦瓜多糖的测定方法研究

为开发和利用苦瓜多糖,选用苯酚硫酸法和蒽酮硫酸法测定苦瓜多糖的含量;比较不同成熟度苦瓜中多糖的含量差别;比较冻融法制备的苦瓜汁粉及苦瓜渣粉中多糖含量。结果显示,对同一种样品利用苯酚硫酸法和蒽酮硫酸法测定,测定结果分别为28.00%和29.25%,苯酚硫酸法测定结果更为准确合理,可作为苦瓜中多糖含量测定的首选方法;测定不同成熟度苦瓜的多糖含量,发现苦瓜成熟度越高,多糖含量越低,说明苦瓜生理成熟阶段,苦瓜多糖是重要的呼吸基质之一;利用冻融法制备的苦瓜汁粉多糖含量为31.25%,苦瓜渣粉多糖含量为28.64%,说明冻融法获得的苦瓜汁没有起到完全分离苦瓜多糖的作用。