Effects of land preparation and maize cultivar on efficiency of N-fertilizer applied at different times and by different methods in maize—mungbean association using15N

Summary A field experiment was conducted using¹⁵N-labelled urea on a Reddish Brown Lateritic (Peleustult) soil. Growing two crops on flat land and on soil ridges of 15 cm height produced similar comparative effects from fertilizer on maize. However, fertilizer applied by broadcasting on maize with a 50 cm effective band followed by incorporating was more useful to mungbean than that applied by banding below the cereal seed rows when crops were grown on flat land. The reverse was observed when crops were grown on ridges. It was deduced that the maize cultivar was not likely to affect comparative efficiencies of fertilizer. For fertilizer application at sowing, broadcasting in 50 cm maize effective band followed by incorporating was slightly superior to banding below maize seed rows. Side-dressing of fertilizer to maize at 4 weeks after sowing was superior to application at sowing. Evenly-split application, at sowing and at 4 weeks after sowing, was either only slightly superior or comparable to non-split application by banding below maize seed rows at sowing, depending on placement method of the first application. Soil moisture status as a possible factor rendering discrepancy in the comparative efficiencies obtained by different authors is discussed.     

Methods for estimating the number of the Cryptomeria red mite,especially with the removal by solutions

We compared the removal by solution, the represented count-area method and the beating, for the purpose of estimating the number of the Cryptomeria red mite. Among them the solution procedure provided the smallest standard error as per cent of the mean. 0.25 per cent unheated solution of sodium hydroxide is used for the summer generation, and also 0.25 per cent boiling one for the winter eggs. The mean proportion removed±standard error for the summer eggs and the winter eggs were 0.8770±0.0316 and 0.7920±0.0281 respectively, while 0.9894±0.0050 for the mites.     

用Hela229细胞培养法研究呼吸道肺炎衣原体感染

本文用Ｈｅｌａ２２９细胞培养与单克隆抗体免疫荧光法对９４０例咽拭子及２２４例纤支镜取材标本进行肺炎衣原体分离鉴定。结果正常组、上呼吸道感染组、下呼吸道感染组、肺部肿瘤组的咽拭子标本分离率分别为０％（０／２４８）,２．１３％（１０／４６８）,２．１％（３／１４６）,１．２８％（１／７８）。上呼吸道感染组和下呼吸道感染组的分离率均高于正常组和肺部肿瘤组。前二组与正常组的差异有显著性意义（Ｐ＜０．０５）,与肿瘤组的差异无显著性意义（Ｐ＞０．０５）。下呼吸道感染组、肺部肿瘤组的纤支镜取材分离率分别为１０．９６％（     

Automated measurement of root length with a three-dimensional high-resolution scanner and image analysis

For measuring the length of root samples, the use of a three-dimensional (3D) scanner is proposed to address the problem of a too low resolution. The scanner's high resolution (up to 354 pixels per cm) enables in the resulting grey-value image very thin roots (diameter 100 m) to be segmented from the background by a simple thresholding operation. After skeletonizing, total length of the roots is calculated by multiplying the number of skeleton pixels by a correction factor. A comparison with the modified Newman Line-Intersect Method showed a correlation of r=0.98. Besides its superior resolution, an advantage of this type of scanner is its focusing depth, which allows root samples to be recorded on the scanbed similarly to a camera-oriented system.     

中国蜡梅属植物过氧化物同工酶的研究

采用聚丙烯酰胺凝胶电泳系统,进行了蜡梅属8种植物过氧化物同工酶的研究。结果发现：该属8种植物的酶谱差异显著,每个种均有其特征酶谱。根据其种的酶谱酶带数目、Rf、宽度及其活性强弱的不同,可将各个种加以区别,但不支持保康蜡梅和突托蜡梅作为独立种的存在,也不支持蜡梅属分为蜡梅组和新蜡梅组的观点。同时,采用排序方法对蜡梅属8种植物酶谱的相似程度进行排序结果发现：与该属8种植物酶谱分类相吻合,并从分子水平上论证了它们的亲缘关系,即保康蜡梅为蜡梅的种内变异,以作蜡梅栽培品种处理;突托蜡梅作为浙江蜡梅的变种为佳,从而为蜡梅属植物种群的合理划分,提出了新的依据和手段。     

Logistic曲线参数的一个最佳估计方法

本文提出用O．628优选法和SAS/STAT软件NLIN模块中的DUD法,对Logistic曲线中的参数k,a和b可得到最佳估计。     

Physiotherapy students’ perceptions of ageing – Playing narratives as a pedagogical innovation

Introduction and objectivesThere is a considerable lack of structure in training health professionals in geriatrics. The narratives can promote a collaborative reflection on different topics and might be used as a pedagogic strategy for undergraduate health students. This study aimed to explore the adoption of new perspectives on ageing after the implementation of dynamic narratives in the first graduate year for physiotherapy students.Materials and methodsAn exploratory qualitative study was performed. Participants were included if they were: ≥18 years old, physiotherapy students and agreed to participate. Physiotherapy students (n = 44) were recruited from the School of Health Sciences, Polytechnic Institute of Leiria. Two gaming sessions were performed to help students, as narrators, express their visions and ways to deal with the geriatrics field. Students’ perspectives about ageing at baseline (T1) and after the narratives experience (T2) were collected by answering the following question: What is your perception regarding ageing? Two evaluators were involved in qualitative data analysis by performing: (i) an individual analysis of themes/subthemes and a discussion meeting to evaluate discrepancies and to reach a consensus.ResultsNegative perceptions about ageing were referred 39 times at T1 (most of them related to restriction; deterioration subthemes). There were no negative perceptions registered at T2. Positive perceptions increased at T2, from n = 39 to n = 52, and three new subthemes emerged (beginning of something, fighting ageism, challenge).ConclusionThis study demonstrated the potential of narrative-based experiences as a desirable pedagogic methodology (board games-oriented) for geriatric education in undergraduate health students.     

测定胸腺肽含量几种定量方法的比较

本文用凯氏定氮法、双缩脲法及福林－酚法测定了胸腺肽含量,并加以比较,说明三种方法对其含量测定没有显著差异．在实践中可以根据不同条件选择适当的方法进行实验．     

蛇胆祛痰作用的实验研究

用２组小鼠,每组１０只。实验组用蛇胆酒灌胃,对照组用生理盐水灌胃,均以气管内酚红排泄法观察。结果示,酚红排泄量实验组比对照组明显为高。说明蛇胆确有增加小鼠气管分泌,稀释痰液的作用