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Morphological change of rhizoids in Bacillus species caused by interaction with various salts and strategies for acquiring nutrition through root-like rhizoids
No full textThe Bacillus sp. isolated in our laboratory reverses the spiral direction and regularly transforms into various patterns,depending on the salt type and concentration in the culture medium. It is also called a rhizoid because it adopts a structure similar to plant roots. In this study, we analyzed the composition of secretions of this bacterium to help elucidate the significance of these morphologically characteristic colonies to the bacterial life in the environment and some of the mechanisms involved in the morphological transformation. Optical and electron microscopic observations
revealed that the rhizoid comprised rows of contiguous, rod-shaped cells, which were covered with secretions.Because the spiral direction of the colonies changes depending on salts in the medium, we believed that the secretions covering
the cell surface may interact with the salts in the medium, and therefore identified the secretions. The results of the experiments indicated that the bacterium is likely to secrete polyglutamic acid.
In addition, in this study we indicated that the Bacillus sp. has a structure of rhizoids like plant roots and indeed, this bacterium transported the compounds to the center of the surrounding colonies, similar to the action in plants
Meaning and of delicious water certification business in Fukui relationship of water quality and surface geology
No full textIn addition to promoting the conservation of spring water , a valuable asset of the region of
Fukui Prefecture, for the purpose of transmitting the charm of the area look better by good quality
water, and certified spring water such as " delicious water of Fukui." and, it had been certified 35 locations in until last year. Currently, appropriate conservation of these approved land may have something else to those which are continuously made to understand the water quality by geological survey, it is necessary to evaluate the conservation. In this study, cluster analysis, using principal
component analysis, and shows the relationship between the quality of spring water and the geologic
Introduction of Comprehensive Practice to Mechanical Technology Training
No full textMechanical technology training is one of the most important subjects in mechanical engineering department. In this paper, we report a new comprehensive practice which has been introduced to mechanical technology training II for the third grade students in 2014. In the new comprehensive practice, the students produce a mini-vice which consists of four parts using several machines after reading the drawings. This program can solve the previous problems. We believe it makes the students capable to connect the knowledge of drawing and knowledge of manufacturing processes
Development of the simple determination for a trace amount of molybdenum in human serum
No full textMolybdenum attracts the attention as a trace amount of metallic element existing in the living body. The establishment of the simple determination of molybdenum content in serum was conducted. The effect of the matrix modifier to use for the direct determination of a trace amount of molybdenum in serum by graphite furnace atomic absorption method (GF-AAS) was considered. For the determination of molybdenum in serum, :Mg (NO3)2, Pd+Mg (NO3)2 or BaF2 as a matrix modifier were used and their fundamental analytical conditions were examined. Before atomizing and measuring
molybdenum in serum, it was necessary to ash the organic matter contained in serum at a high temperature to remove interference materials such as human serum protein. To get the stability of the absorbance of molybdenum and to remove the interference material coexisting in serum, the addition of Pd+Mg (NO3)2, BaF2 as a matrix modifier was needed at the ashing temperature 1,800℃ , 1,700℃ ,
respectively. To examine the influence of the matrix interference between the calibration curve method and the standard addition method, their slopes were compared. Because the slope between the calibration curve method and standard addition method almost agreed, the addition of BaF2 as a matrix modifier was thought to be removed matrix interference in serum. From the above-mentioned result, the direct determination for a trace amount of molybdenum in serum by the graphite furnace atomic absorption method using BaF2 was found to be possible