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Jiro Kohda Yasuhisa Nakano Akimitsu Kugimiya Yu Takano Takuo Yano 《Journal of Material Cycles and Waste Management》2017,19(3):999-1007
Wastewater is discharged during washing processes in the production of biodiesel fuel (BDF) using alkaline catalysts. It can be recycled as a liquid fertilizer for hydroponics by adding essential components for plant growth. The effects of the liquid fertilizer on plant growth were investigated. Liquid fertilizer containing a smaller amount of the BDF wastewater had a similar effect on plant growth as the standard nutrient solutions. This result reveals that BDF wastewater can be recycled for use as a liquid fertilizer for hydroponics. However, fertilizer with a larger amount of the BDF wastewater showed poor and varied plant growth due to the growth of microorganisms in the contaminated wastewater. Hence, when BDF wastewater becomes contaminated during storage, sterilization is necessary to recycle it as a liquid fertilizer. Moreover, contamination during storage should be avoided for successful recycling. 相似文献
2.
Y. Henmi 《Marine Biology》1989,101(1):53-60
Two behaviorally distinct forms — courtship signal — (Form L and V) of Macrophthalmus japonicus (De Haan) are known. Monthly samples of each form were collected from two areas in Japan: Form L from Amakusa, western Kyushu, between April 1985 and February 1986; Form V from Fukuoka, northern Kyushu, between November 1982 and December 1983. Life-history traits were compared between two populations and discussed. Individuals from the Amakusa population grew more slowly and matured at a smaller size than those from the Fukuoka population. Maturation period and longevity did not differ significantly. In the first year of reproduction, females in the Fukuoka population produced more, and larger broods than those in the Amakusa population and crab mortality was higher in every age group. Egg size did not differ significantly. The major environmental factors — air-temperature, nitrogen content of the surface mud and period of aerial exposure were similar in both areas, and it is suggested that the differences in life-history exhibited by these crabs are genotypic, and perhaps related to their different form. 相似文献
3.
Yuta Sadano Ryota Toshimitsu Jiro Kohda Yasuhisa Nakano Takuo Yano 《Journal of Material Cycles and Waste Management》2010,12(4):308-313
Development of a cheap system for reuse of glycerol by-product discharged from the biodiesel fuel (BDF) production process
is needed in parallel with development of a low-cost BDF production system. In this article, optimization of compost fermentation
of glycerol by-product was studied. The type and amount of additive nitrogen source was studied, and good utilization of glycerol
was observed when 0.5 g of urea was added to a mixture of 625 g dry sawdust, 25 g of microbial seed, and 50 g of glycerol
by-product. To achieve efficient compost fermentation, repeated batch fermentation was applied and five batch cultures were
repeated. Although the pH level and nitrogen and water contents were maintained at suitable levels for microbial growth, the
glycerol consumption rate gradually decreased with accumulation of oily compounds in the compost. Finally, a material cost
evaluation of the compost fermentation proposed in this study was performed. The total material cost decreased to ¥0.57 /l
of BDF when employing an existing compost system for the fermentation process, although sawdust used for mushroom cultivation
was used in this study at the very high cost of ¥123 /kg dry sawdust. However, the cost of disposal of the glycerol byproduct
as an industrial waste was ¥5.2 /l of BDF produced; therefore, there might be an economical advantage to compost fermentation
of glycerol by-product from BDF production. 相似文献
4.
Yasuhisa Henmi 《Marine Biology》1992,113(4):569-577
Interannual fluctuation of life-history traits in the mud crab Macrophthalmus japonicus (De Haan) was studied for a 7-yr period (1981 to 1987) in an intertidal mudflat in the estuary of the Tatara-Umi River, Fukuoka, Japan. Density of juveniles fluctuated greatly, and maximum annual density was low in 1981 to 1984 (22.0 to 44.0 m-2) and very high in 1985 to 1987 (98.5 to 188.6 m-2). In 1980, recruits may have been very few, though there is no data on or before 1980, because no crab of the 1980 cohort was found during the study period. Density of adult crabs was almost stable (11.0 to 32.6 m-2), perhaps because of density-dependent mortality. Under the high density conditions prevailing from 1985 to 1987 crabs grew slowly and longevity was shorter. Male chela and female abdomen were dwarfish, and females produced few and small broods. The changes of life-history traits under high density conditions were thought to result from strong intraspecific competition for space. 相似文献
5.
Tae Won Kim Kotaro Sakamoto Yasuhisa Henmi Jae C. Choe 《Behavioral ecology and sociobiology》2008,62(7):1139-1147
For males, courting and foraging are often behavioral alternatives, which take time and consume energy. When males have a
possibility of mating with receptive females, there may be a behavioral trade-off between courtship and feeding; the outcome
of which may be affected by male physiological condition and food availability. Although many mathematical models and empirical
studies suggest that the expression of male courtship signals are condition-dependent, decisions about courtship and mating
strategies in relation to food availability have not attracted much attention. In this study, we tested whether daily changes
in food availability affect males’ decisions about whether to court. We conducted experiments with the fiddler crab Uca lactea by providing males with additional food every other day. In food-supplemented enclosures, males did not increase courtship
activity on the days when food was supplemented. However, they built more courtship structures (semidomes) and waved more
on the days when they were not given additional food. Male size had a strong influence on the number of days the males courted.
We also tested whether the frequency of surface mating, as an alternative reproductive tactic, decreased when food was supplemented.
Contrary to our expectation, the number of males that exhibited the surface-mating tactic increased when food was supplemented
whereas the number of mate-searching females did not change. Our findings in this field study suggest that reproductive decisions
by male fiddler crabs are affected by fluctuating food availability and present body condition, and the alternative mating
tactic of this species may be more frequently used by males under good condition. 相似文献
6.
Evaluation of chemical stability of heavy metals in industrial waste slag by infrared spectroscopy 总被引:1,自引:1,他引:0
Takao Ando Mayumi Jige Hirotomo Ueno Teruo Henmi Zaenal Abidin Naoto Matsue 《Journal of Material Cycles and Waste Management》2010,12(4):302-307
Our aim was to clarify the chemical bonding type and stability of heavy metals in industrial waste slag (IWS) by using Fourier
transform infrared (FT-IR) spectroscopy. The chemical composition of the IWS sample used in this study was an Al/Si ratio
of 0.50 with Fe, Pb, and other minor heavy metals present. The IR peak position of the Si-OSi( M) band (M: Al, Pb, or Fe)
was lower for IWS (971 cm−1) than for synthetic Si-Al glass with an Al/Si ratio of 0.5 (1029 cm−1). This implies the formation of covalent Si-O-Pb and Si-O-Fe bonds in the IWS, which caused a shift in the peak position
toward a lower wavenumber. FT-IR spectra of synthetic Si-Al-Pb and Si-Al-Fe glasses with various Pb/Si and Fe/Si ratios with
a constant Al/Si ratio of 0.5 showed that the peak position of the Si-O-Si(M) band continuously shifted toward lower wavenumbers
with increasing Pb/Si and Fe/Si ratios. This suggests that covalent Si-O-Pb and Si-O-Fe bonds are formed in IWS. The comparison
of peak positions of the Si-O-Si(M) band between IWS and Si-Al-Fe glass indicated that not only Pb but also other minor heavy
metals such as Cu and Cr were included by covalent bonds into the structure of IWS. Therefore, we concluded that most of the
heavy metals in IWS formed covalent Si-O-M bodings and were chemically stable. 相似文献
7.
Yasumasa?Kuwahara Takuya?Yamaguchi Yayoi?Ichiki Tsutomu?Tanabe Yasuhisa?AsanoEmail author 《Die Naturwissenschaften》2017,104(3-4):19
Hydrogen peroxide was newly and simultaneously demonstrated with well-known hydrogen cyanide as a component of defensive secretions of “benzoyl cyanide” producing polydesmid millipedes. Presence of hydrogen peroxide was successively evidenced by Trinder reagent’s spray with colorless as well as oily smears of defensive secretions containing benzoyl cyanide and hydrogen cyanide by alkaline picrate paper treatment. Linear correlation was demonstrated between quantities of hydrogen peroxide and benzoyl cyanide. By qualitative assay, seven benzoyl cyanide containing polydesmidans (six species of adults and one species of a nymph at stadium I) tested positive to Trinder reagent, indicative of the presence of hydrogen peroxide (together with hydrogen cyanide), while two cyanogenic species without benzoyl cyanide exhibited negative responses to the reagent. Two types of millipedes were elucidated as species of cyanogenic Polydesmida. 相似文献
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