Design and pilot production of a “spiral-winder” for the manufacture of cylindrical laminated veneer lumber     

Toshihiro Hata  Kenji Umemura  Hidefumi Yamauchi  Akihiro Nakayama  Shuichi Kawai  Hikaru Sasaki 《Journal of Wood Science》2001,47(2):115-123

A new spiral-winder was developed for continuous manufacturing of cylindrical laminated veneer lumber (LVL), and a suitable resin adhesive for this cylindrical LVL manufacturing system was investigated. This phase was followed by trial manufacturing and evaluation of cylindrical LVL with the optimum resin adhesive identified. The results are summarized as follows. (1) The shortest gelation time was recorded with a mixture of two commercial resorcinol based resins (DF-1000 and D-33) at a weight ratio of 2575. (2) Bath temperature had a remarkable effect on the gelation time of the adhesive mix. (3) High bonding strength was recorded by 2575 DF-1000/D-33 adhesive mix at a high press temperature despite a short pressing duration. Based on the results of items (1) to (3), 2575 DF-1000/ D-33 is recommended for use in the new spiral-winder. (4) The mechanical properties of cylindrical LVL could be improved by using 2575 DF-1000/D-33 with wider veneer width and longer pressing time. (5) The mechanical properties, especially the modulus of rupture, of the cylindrical LVL manufactured require further improvement for practical structural application.  相似文献   

Dynamic behavior of tea catechins interacting with lipid membranes as determined by NMR spectroscopy     

Uekusa Y  Kamihira M  Nakayama T 《Journal of agricultural and food chemistry》2007,55(24):9986-9992

Interaction between tea catechins, such as epicatechin gallate (ECg) and epigallocatechin gallate (EGCg), and isotropic bicelle model lipid membranes was investigated by solution NMR techniques. (1)H NMR measurements provided signals from the B-ring and the galloyl moiety in ECg and EGCg that were obviously shifted, and whose proton T1 relaxation times were shortened upon interaction of the catechins with the bicelles. These results indicate that the B-ring and the galloyl moiety play an important role in this interaction. Nuclear Overhauser effect spectrometry experiments demonstrated that the B-ring and the galloyl moiety are located near the gamma-H in the phospholipid trimethylammonium group. On the basis of these findings, we propose that ECg and EGCg interact with the surface of lipid membranes via the choline moiety.  相似文献   

Evaluation of Serum Phosphorylated Neurofilament Subunit NF‐H as a Prognostic Biomarker in Dogs With Thoracolumbar Intervertebral Disc Herniation     

Hidetaka Nishida DVM  PhD  Masanari Nakayama DVM  PhD  Hiroshi Tanaka DVM  PhD  Hiroaki Kamishina DVM  PhD  Takeshi Izawa DVM  PhD  Shingo Hatoya DVM  PhD  Kikuya Sugiura DVM  PhD  Yoshihisa Suzuki MD  PhD  Chizuka Ide MD  PhD  Toshio Inaba DVM  PhD 《Veterinary surgery : VS》2014,43(3):289-293

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Bovine papillomavirus type 10 with a deletion associated with a lingual papilloma in a cow     

Wei Zhu  Jianbao Dong  Kazuyuki Uchida  Ken-ichi Watanabe  Hiroyuki Nakayama  Yoshitaka Goto  Takeshi Haga 《Veterinary journal (London, England : 1997)》2014,199(2):303-305

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Role of free neuromasts in larval feeding of willow shiner Gnathopogon elongatus caerulescens Teleostei, Cyprinidae     

Yukinori Mukai 《Fisheries Science》2006,72(4):705-709

ABSTRACT:   It has been reported that the larvae of willow shiner Gnathopogon elongatus caerulescens have many free neuromasts on their body surface. This study examined the ability of the willow shiner larvae to feed on zooplankton by mechanoreception by the free neuromasts. Feeding experiments using untreated larvae and larvae treated with streptomycin, which impairs free neuromast function, were conducted under light and completely dark conditions. The larvae were put into Petri dishes, then nauplii of Artemia salina were introduced. The average number of Artemia eaten by the larvae was expressed as the average ingestion rate of Artemia /10 min. The ingestion rate of Artemia for untreated larvae was 12.3 under light conditions and 10.6 Artemia /10 min. even in complete darkness. The ingestion rate in the larvae treated with streptomycin was 11 under light conditions and only 0.8 Artemia /10 min under dark conditions. The low rate in the treated larvae under dark conditions must be due to impairment by the streptomycin. Therefore, the high ingestion rate for the untreated larvae under dark conditions would be surely dependent on mechanoreception. The results indicate that larval willow shiner is able to feed on zooplankton under limited light conditions.  相似文献   

Effect of shrimp head protein hydrolysates on the state of water and denaturation of fish myofibrils during dehydration   总被引：1，自引：0，他引：1  

Yaowalux?Ruttanapornvareesakul  Misako?Ikeda  Kenji?HaraEmail author  Kazufumi?Osako  Orawan?Kongpun  Yukinori?Nozaki 《Fisheries Science》2005,71(1):220-228

ABSTRACT:   To utilize fisheries waste products as food materials with functional properties, shrimp head protein hydrolysates (SHPH) from three species of shrimp, that is, Northern pink shrimp ( Pandalus eous ), Endeavour shrimp ( Metapenaeus endeavouri ) and Black tiger shrimp ( Penaeus monodon ), were produced by enzymatic hydrolysis using endopeptidase derived from Bacillus subtilis and exopeptidase derived from Aspergillus oryzae at a level of 0.1% (w/w). SHPH were rich in protein (90–91%) and amino acids (71–84%) but little fat (0.01–0.02%). The average molecular weight of SHPH was 300–1400. The effect of 5% SHPH (dry basis) addition on the state of water and denaturation of lizard fish myofibrils (Mf) during the dehydration process was evaluated by the desorption isotherm and the Ca-ATPase activity, and compared with the effect of sodium glutamate (Na-Glu). SHPH decreased the water activity and the Ca-ATPase inactivation, and increased monolayer sorbed water and multilayer sorbed water of Mf, although these effects of SHPH were smaller than those of Na-Glu. These findings suggest that the SHPH suppressed dehydration-induced denaturation of myofibrillar protein by stabilizing the hydrated water surrounding myofibrils.  相似文献   

Immunolocalization of sex steroid receptors in the epididymis and ductus deferens of immature and mature Japanese Quail, Coturnix Japonica     

Hanako NISHIZAWA  Toshikazu OKAMOTO  Yukinori YOSHIMURA 《Animal Science Journal》2002,73(5):339-346

The goal of this study was to determine whether in the Japanese quail the male genital tract contains receptors for progesterone, androgen and estrogen (PR, AR and ER, respectively), which have significant roles in reproductive functions, and whether their localization changes during sexual maturation. The epididymis and ductus deferens (middle and ampulla regions) of immature (approximately 30-day-old) and mature male Japanese quail were collected and frozen sections of them were immunostained for PR, AR and ER. The immunoreaction products for AR and PR were found in the nuclei of epithelial cells in the efferent ductules, epididymal duct, and the middle and ampulla regions of the ductus deferens of mature and immature birds. In the mature birds, the epithelial cells of the efferent ductules, epididymal duct, and the middle and ampulla regions of the ductus deferens were positive for ER, although some of the cells in the ductus deferens were negative. The epithelial cells of the ductules in the epididymis stained positive for ER, but the immunoreactions were negligible in the ductus deferens of immature birds. These results suggest that the epididymis and ductus deferens in quail possesses PR, AR and ER receptors. Each receptor is expressed before sexual maturation, although enhancement of ER expression may occur during maturation.  相似文献   

Inheritance and chromosomal location of the homoeologous genes affecting phenol colour reaction of kernels in durum wheat     

N.?WatanabeEmail author  A.?Takeuchi  A.?Nakayama 《Euphytica》2004,139(2):87-93

End-use quality of wheat for noodles is influenced by polyphenol oxidase activity and its corresponding substrates. This study investigated the chromosomal location of genes that determine phenol colour reaction of kernels in tetraploid wheat using aneuploid stocks. Polyphenol oxidase activity was estimated by the colour reaction of kernels to phenol solution. It was found that the genes located on homoeologous group 2 chromosomes have an important effect on the level of phenol colour reaction of kernels. The genes (Tc1 and Tc2) responsible for high phenol colour reaction of kernels were mapped to the long arms of chromosome 2A and chromosome 2B, respectively. The map distances were estimated to be 46.8 cM for Tc1 and 40.7 cM for Tc2 from the centromere using double-diltelosomics of durum wheat.  相似文献   

A protein that binds to a cis-acting element of wheat histone genes has a leucine zipper motif   总被引：34，自引：0，他引：34  

T Tabata  H Takase  S Takayama  K Mikami  A Nakatsuka  T Kawata  T Nakayama  M Iwabuchi 《Science (New York, N.Y.)》1989,245(4921):965-967

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Aureusidin synthase: a polyphenol oxidase homolog responsible for flower coloration   总被引：1，自引：0，他引：1  

Nakayama T  Yonekura-Sakakibara K  Sato T  Kikuchi S  Fukui Y  Fukuchi-Mizutani M  Ueda T  Nakao M  Tanaka Y  Kusumi T  Nishino T 《Science (New York, N.Y.)》2000,290(5494):1163-1166

Aurones are plant flavonoids that provide yellow color to the flowers of some popular ornamental plants, such as snapdragon and cosmos. In this study, we have identified an enzyme responsible for the synthesis of aurone from chalcones in the yellow snapdragon flower. The enzyme (aureusidin synthase) is a 39-kilodalton, copper-containing glycoprotein catalyzing the hydroxylation and/or oxidative cyclization of the precursor chalcones, 2',4',6',4-tetrahydroxychalcone and 2',4',6',3,4-pentahydroxychalcone. The complementary DNA encoding aureusidin synthase is expressed in the petals of aurone-containing varieties. DNA sequence analysis revealed that aureusidin synthase belongs to the plant polyphenol oxidase family, providing an unequivocal example of the function of the polyphenol oxidase homolog in plants, i.e., flower coloration.  相似文献