Persistence of CaCl₂ washing effect for amelioration of a Cd-contaminated paddy field soil     

Takeshi HAYASHI  Toshikatsu KIDA  Masami NANZYO  Tadashi TAKAHASHI  Mitsuo HONNA  Yoshio AIKAWA  Koichi YOSHIHARA 《Soil Science and Plant Nutrition》2007,53(6):720-728

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Non-specific cellular function of Eisenia fetida regulated by polycyclic aromatic hydrocarbons: The 7th international symposium on earthworm ecology · Cardiff · Wales · 2002     

Kazuo Komiyama  Masashiro Okaue  Yukako Miki  Mitsuo Ohkubo  Itaru Moro  Edwin L. Cooper 《Pedobiologia》2003,47(5-6):717-723

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Chronology development of Hiba arbor-vitae (<Emphasis Type="Italic">Thujopsis dolabrata</Emphasis> var. <Emphasis Type="Italic">hondae</Emphasis>) and dating of timbers from an old building     

Motonari Ohyama  Megumi Ohwada  Mitsuo Suzuki 《Journal of Wood Science》2007,53(5):367-373

Two site chronologies of the ring widths of Hiba arbor-vitae (Thujopsis dolabrata var. hondae) were developed for the northern-most part of Honshu Island, Japan (AOTK: 1715-2001, AOSO: 1753-2000). These are highly coherent, satisfactorily indicating high values of expressed population signal and mean correlation between trees. The two series were merged into a single composite chronology, spanning a period of 287 years from 1715 to 2001, because they correlated significantly with each other. The developed chronology is the first quality-controlled tree-ring chronology for this region extending back to the eighteenth century. Using the master chronologies, we successfully crossdated three historical timbers from an old building near the sampling sites. The tree-ring dates strongly supported the documented construction date of the building. It is revealed that Hiba arbor-vitae has sufficient potential to contribute to future dendrochronological study in this region by extending the chronologies back into the past.  相似文献   

Formaldehyde emission and high-temperature stability of cured urea-formaldehyde resins   总被引：5，自引：0，他引：5  

Shin -ichiro Tohmura  Chung -Yun Hse  Mitsuo Higuchi 《Journal of Wood Science》2000,46(4):303-309

A test method for measuring formaldehyde from urea-formaldehyde (UF) resins at high temperature was developed and used to assess the influence of the reaction pH on the formaldehyde emission and heat stability of the cured resins. Additionally, solid-state¹³C CP/MAS nuclear magnetic resonance (NMR) techniques were used to investigate the structure of cured UF resins before and after high temperature heating. Formaldehyde emissions during the cure were related to the UF resins' methylol group content. The heat stability of cured UF resins synthesized under strongly acidic conditions was much higher than that of the other resins, which were prepared in weakly acidic and alkaline media. Solid-state¹³C CP/MAS NMR spectra showed that formaldehyde emission from cured UF resins after heating is mainly ascribable to decreased methylol groups and dimethylene ether linkages. Significantly, it was revealed that uron structures characteristically found in the cured UF resin synthesized under strongly acidic medium indicated high heat stability.Parts of this paper were presented at the 44th annual meeting of the Japan Wood Research Society, Nara, April 1994; and at the 52nd annual meeting of the Forest Products Society, Merida, Mexico, June 1998  相似文献   

Relationship between indocyanine green clearance test and feed intake and impaired hepatic function in dairy cows     

Ono M  Ohtaki T  Tanemura K  Ishii M  Tsumagari S 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2011,73(11):1497-1499

The purposes of this study were 1) to examine changes in the indocyanine green (ICG) clearance by feeding and 4-day fasting in dry cows, and (2) to investigate the relationship between ICG clearance and blood chemistry profile in postpartum cows. In 3 dry cows, post-feeding ICG half-life (T(1/2)) was shorter than the pre-feeding value, and post-fasting T(1/2) was longer than pre-feeding and post-feeding values. In 16 lactating cows, T(1/2) value at 2 weeks postpartum showed positive correlations with AST, T-Bil and γ-GTP. These results suggested that ICG clearance correlated with T-Bil and liver enzymes can be sensitive and accurate diagnostic marker for impaired liver function in dairy cows. In addition, ICG clearance is greatly affected by feeding and fasting.  相似文献   

Calcitonin receptor binding in the hen anterior pituitary during an oviposition cycle     

Hiroyuki NAKAYAMA  Tetsuya TAKAHASHI  Kaori NAKAGAWA‐MIZUYACHI  Mitsuo KAWASHIMA 《Animal Science Journal》2011,82(5):679-683

The equilibrium dissociation constant (K_d) and the maximum binding capacity (B_max) of calcitonin (CT) receptor in the plasma membrane of the anterior pituitary in hens were examined by Scatchard analysis of specific binding of ¹²⁵I‐labeled chicken CT. Values of K_d and B_max of CT receptor were smaller in laying hens than in non‐laying hens. A decrease in the K_d and B_max value of CT receptor was observed in the anterior pituitary after the injection of estradiol‐17β and progesterone into nonlaying hens, but not changed after the injection of 5α‐dihydrotestosterone. During an oviposition cycle, the K_d and the B_max value decreased 3 h before oviposition. In non‐laying hens, neither the K_d nor the B_max value changed during a full day period. The present study suggests that the CT action on the anterior pituitary may increase 3 h before oviposition by the effect of estradiol‐17β and progesterone in laying hens.  相似文献   

Relationship between psychosomatic complaints and circadian rhythm irregularity assessed by salivary levels of melatonin and growth hormone     

Mitsuo Nagane  Rie Suge  Shu-Ichi Watanabe 《Journal of circadian rhythms》2011,9(1):1-6

Background

Adenosine 5-triphosphate (ATP) and its breakdown products ADP and adenosine can act as extracellular messengers in a range of biological processes. Extracellular adenine nucleotides are metabolized by a number of enzymes including NTPDases and 5'-nucleotidase, which are considered to be the major regulators of purinergic signaling in the blood. Previous work by our group demonstrated that ATPase and ADPase activities in rat serum exhibit a 24-h temporal pattern, with higher enzyme activity during the dark (activity) phase. It was found that stress can cause disruptions in biological circadian rhythms and in the cardiovascular system. Therefore, the aim of the present study was to examine the influence of acute stress exposure upon temporal patterns of NTPDase and 5-nucleotidase enzyme activities in rat blood serum.

Methods

Adult male Wistar rats were divided into 4 groups: ZT0, ZT6, ZT12 and ZT18. Each group was subdivided in 4 groups: control, immediately, 6 h and 24 h after one hour of restraint stress. ATP, ADP and AMP hydrolysis were assayed in the serum.

Results

All stressed groups showed significant decreases in all enzyme activities at ZT 12 and ZT 18 when compared with control.

Conclusion

Acute stress provokes a decrease in nucleotidase activities dependent on the time that this stress occurs and this effect appears to persist for at least 24 hours. Stress can change levels of nucleotides, related to increased frequency of cardiovascular events during the activity phase. Altered levels of nucleotides in serum may be involved in cardiovascular events more frequent during the activity phase in mammals, and with their etiology linked to stress.  相似文献   

Association of a single nucleotide polymorphism in ribosomal protein L27a gene with marbling in Japanese Black beef cattle     

Takahisa YAMADA  Seiki SASAKI  Shin SUKEGAWA  Takeshi MIYAKE  Tatsuo FUJITA  Hiroyuki KOSE  Mitsuo MORITA  Youichi TAKAHAGI  Hiroshi MURAKAMI  Fumiki MORIMATSU  Yoshiyuki SASAKI 《Animal Science Journal》2009,80(6):631-635

Marbling, defined by the amount and distribution of intramuscular fat, is an economically important trait of beef cattle in Japan. The c2‐11#2 expressed sequence tag (EST) has been previously shown to possess expression difference in musculus longissimus muscle between low‐marbled and high‐marbled steer groups, and to be located within genomic region of a quantitative trait locus for marbling. Thus, the ribosomal protein L27a (RPL27A) gene containing the c2‐11#2 EST sequence was considered as a positional candidate for the gene responsible for marbling. In the present study, a single nucleotide polymorphism (SNP) in the promoter region of the RPL27A, referred to as g.3109537C>T, was detected between the 2 steer groups. The SNP was associated with the predicted breeding value for beef marbling standard number by the analyses using Japanese Black beef cattle population. The effect of genotypes of the SNP on the predicted breeding value for subcutaneous fat thickness was not statistically significant. These findings suggest that the RPL27A SNP may be useful for effective marker‐assisted selection to increase the levels of marbling in Japanese Black beef cattle.  相似文献   

Nutrient distribution across wheat rhizosphere with oxamide and ammonium sulfate as N source     

Md. Yunus Miah  Shinjiro Kanazawa  Mitsuo Chino 《Soil Science and Plant Nutrition》2013,59(4):579-587

Analysis of the behavior of slow releasing nitrogen fertilizers in the rhizosphere soil of agricultural crops is essential for their effective use. This work presents a comparative study of the effects of oxamide and ammonium sulfate as different N sources on the relative mobility of some nutritionally important anions and cations and their relevance to plant growth, root development, and pH distribution pattern in the rhizosphere of wheat (Triticum aestivum cv. Nourin No. 61). Experiment was conducted on a Japanese upland alluvial soil through a rhizobox approach. In the central compartment (CC) of the oxamide and ammonium sulfate treated rhizoboxes, four uncontaminated and homogeneous wheat seedlings germinated on a sterile petridish were grown for nearly two months. During the growing period plant height was recorded weekly. After the growing period, rhizoboxes were dismantled for soil sampling and photography of roots. Soil samples from each compartment of the two rhizoboxes were used for the analysis of CI^-, N0₃ ^-, SO₄ ^2-, Ca²⁺, Mg²⁺, K⁺, NH₄ ⁺-N, N0₃ ^--N and measurement of pH. Compared with ammonium sulfate, the distribution of anions and cations from the distant compartments to the central ones over a distance of 3–5 mm along with a better plant growth, high rooting density, and high pH confirmed that oxamide was an efficient nitrogen fertilizer.  相似文献   

Species differences in calcium and potassium distributions within plant roots     

Mitsuo Chino 《Soil Science and Plant Nutrition》2013,59(4):487-503

Abstract

The Ca and K distributions in the roots of soybean, kidneybean and corn were investigated in relation to their lateral movement within the roots using an electronprobe X-ray microanalyzer. In the corn roots, the accumulation site of Ca was the wall of the cortical cells and little Ca was detected in the stele, suggesting that apoplasmic movement of Ca was blocked by the endodermis. In the legume roots, Ca was detected at the wall of the endodermal and stelar cells as well as the cortical cells, suggesting that the endodermis of the legume roots was permeable to the apoplasmic movement of Ca. K was mainly found within the cells of the roots, suggesting symplasmic movement of K. Neither accumulation nor depletion of the cations at the soil-root interface was observed, but the concentrations of the cations at the root surface appeared to be reduced when the roots were grown in the soil.  相似文献