Adverse effects of excess lysine in calves     

Abe M  Iriki T  Kaneshige K  Kuwashima K  Watanabe S  Sato H  Funaba M 《Journal of animal science》2001,79(5):1337-1345

Two main trials and three preliminary experiments were conducted in order to examine adverse effects of excess lysine in 140- to 150-kg Holstein bull calves. The animals had been trained to maintain reflex closure of the reticular groove after weaning and were fed a corn and soybean meal diet. In Trial 1 (n = 30), administration via the reticular groove of 0 to 64 g/d of lysine as L-lysine monohydrochloride resulted in a linear decrease in DMI and N utilization efficiency, with notably lower values at 64 g/d, although ADG and gain/feed ratio were not affected. Plasma arginine and ornithine did not decrease but rather increased over that range. Free lysine but not free arginine was detected in urine. In addition, free ornithine was excreted into urine only when 64 g/d was administered. Unexpectedly, severe but transient diarrhea occurred when 64 g/d of lysine were administered. Preliminary experiments revealed that a single administration of more than 32 g of lysine as L-lysine monohydrochloride could result in diarrhea, and the diarrhea was proven to be due to the lysine itself and not to the HCl portion. In Trial 2 (n = 15), a single administration of 40 or 60 g of lysine as L-lysine monohydrochloride resulted in increased fecal excretion of free lysine and ornithine, especially the latter, although free arginine was not detected in feces. These results suggested that diarrhea could occur almost concurrently with an imbalance in calves when 64 g/d of lysine was administered. However, lysine did not antagonize arginine at that level or at lower levels. The remarkable increase in fecal ornithine may be somehow related to the development of diarrhea from excess lysine.  相似文献   

Molecular and phylogenetic analysis of Blastocystis isolates from various hosts   总被引：2，自引：0，他引：2  

Abe N 《Veterinary parasitology》2004,120(3):235-242

Blastocystis hominis is a protozoan parasite found in humans. B. hominis-like organisms have been found in a variety of animals, but have been called Blastocystis sp. because the isolates from animals were indistinguishable from B. hominis morphologically. Recent molecular studies show that some isolates from animals have genetic similarity with B. hominis. However, it has been unclear whether the isolates from animals have zoonotic potential or not. In the present study, the SSUrDNA of 19 Blastocystis isolates from these animals was sequenced in its entirety, and the phylogenetic relationship among isolates from humans and animals was clarified using available nucleotide sequences of the same locus. Phylogenetic analysis showed that the 19 isolates analyzed in the present study could be classified into seven groups (I-VII): Group I consisted of the isolates from humans, primates, cattle, pigs and birds; Group II of the isolates from humans and primates; Group III of the isolates from humans, cattle and pigs; Group IV of the isolates from primates, birds and rodents; Group V of the isolates from cattle and pigs; Groups VI and VII of the isolates from humans and birds. These results indicate that many of the isolates harboring in animals have zoonotic potential, or have cross-transmissibility among heterogeneous hosts.  相似文献   

Acinic cell carcinoma in an African pygmy hedgehog (Atelerix albiventris)     

Fukuzawa R  Fukuzawa K  Abe H  Nagai T  Kameyama K 《Veterinary clinical pathology / American Society for Veterinary Clinical Pathology》2004,33(1):39-42

Abstract: A male African pygmy hedgehog ( Atelerix albiventris ), estimated to be 3 years old, presented with exophthalmos and fixed abduction of the right eye. Radiographic examination revealed a retrobulbar tumor in the right orbital cavity. The mass was surgically resected but recurred 3 months later and the hedgehog died. There was no gross or microscopic evidence of salivary or lacrimal gland involvement of the tumor at surgery or at necropsy. The histopathologic, immunohistochemical, and ultrastructural findings were those of acinic cell carcinoma, the origin of which was unknown. This is the first known case of acinic cell carcinoma in an African hedgehog.  相似文献   

Effects of NaCl on Root Growth and Cell Wall Composition of Two Soya bean Cultivars with Contrasting Salt Tolerance     

P. An  X. Li  Y. Zheng  A. Matsuura  J. Abe  A. E. Eneji  E. Tanimoto  S. Inanaga 《Journal of Agronomy and Crop Science》2014,200(3):212-218

Our objectives were to determine the influence of salinity on root cell wall composition in soya beans and the possible mechanism of salt tolerance. Two soya bean cultivars, Touzan 69 (salt sensitive) and Dare (salt tolerant), were selected as experimental material for comparison. Root growth was clearly inhibited by salinity in both cultivars, but Touzan 69 showed more severe reductions in root length than Dare. In the 0–5 mm root segment (from root tip), the total cell wall sugar content of Touzan 69 decreased considerably due to salinity as were the pectin, hemicellulose and cellulose fractions. In Dare, NaCl treatments only caused a slight decrease in the pectin fraction and no marked change in hemicellulose and cellulose fractions. Without salt treatment, the pectin fraction accounted for about 40 % and cellulose for 30 % of cell wall composition in the 0–5 mm root segment; in the 5–10 segment (from root tip), pectin and cellulose accounted for 27 % and 45 % in Touzan 69, and 34 % and 38 % in Dare. The percentage of pectin decreased and that of cellulose increased in the 5–10 mm root segment compared with the 0–5 mm segment. This indicates that pectin largely regulates cell growth, as the 0–5 mm region is considered the elongation zone of soya bean roots. Salt treatment decreased the percentage of pectin, but increased that of cellulose across root zones of the two cultivars, suggesting that salt presence may increase cell wall rigidity, and thus, inhibits root growth. Dare was able to maintain its main root cell wall substances, an apparent advantage for root cell growth that may overall improve its salt tolerance. Also, the less reduction in cell wall uronic acid was of some benefit in the positive regulation of root cell growth in Dare. The changes in cell wall composition, especially the pectin content had a close relation with the regulation of root growth. The difference in salt tolerance between the two tested cultivars can partly be explained on the basis of these changes in response to salinity. Sugar compounds in each cell wall constituent and their functions in ion transport as well as the relationship between root cell wall and soya bean salt tolerance need to be further investigated.  相似文献   

Quantitative evaluation of properties of residual DNA in Cryptomeria japonica wood     

Ugai Watanabe  Hisashi Abe  Kazumasa Yoshida  Junji Sugiyama 《Journal of Wood Science》2015,61(1):1-9

  相似文献   

Regolith migration and sorting on asteroid Itokawa     

Miyamoto H  Yano H  Scheeres DJ  Abe S  Barnouin-Jha O  Cheng AF  Demura H  Gaskell RW  Hirata N  Ishiguro M  Michikami T  Nakamura AM  Nakamura R  Saito J  Sasaki S 《Science (New York, N.Y.)》2007,316(5827):1011-1014

High-resolution images of the surface of asteroid Itokawa from the Hayabusa mission reveal it to be covered with unconsolidated millimeter-sized and larger gravels. Locations and morphologic characteristics of this gravel indicate that Itokawa has experienced considerable vibrations, which have triggered global-scale granular processes in its dry, vacuum, microgravity environment. These processes likely include granular convection, landslide-like granular migrations, and particle sorting, resulting in the segregation of the fine gravels into areas of potential lows. Granular processes become major resurfacing processes because of Itokawa's small size, implying that they can occur on other small asteroids should those have regolith.  相似文献   

Itokawa dust particles: a direct link between S-type asteroids and ordinary chondrites     

Nakamura T  Noguchi T  Tanaka M  Zolensky ME  Kimura M  Tsuchiyama A  Nakato A  Ogami T  Ishida H  Uesugi M  Yada T  Shirai K  Fujimura A  Okazaki R  Sandford SA  Ishibashi Y  Abe M  Okada T  Ueno M  Mukai T  Yoshikawa M  Kawaguchi J 《Science (New York, N.Y.)》2011,333(6046):1113-1116

The Hayabusa spacecraft successfully recovered dust particles from the surface of near-Earth asteroid 25143 Itokawa. Synchrotron-radiation x-ray diffraction and transmission and scanning electron microscope analyses indicate that the mineralogy and mineral chemistry of the Itokawa dust particles are identical to those of thermally metamorphosed LL chondrites, consistent with spectroscopic observations made from Earth and by the Hayabusa spacecraft. Our results directly demonstrate that ordinary chondrites, the most abundant meteorites found on Earth, come from S-type asteroids. Mineral chemistry indicates that the majority of regolith surface particles suffered long-term thermal annealing and subsequent impact shock, suggesting that Itokawa is an asteroid made of reassembled pieces of the interior portions of a once larger asteroid.  相似文献   

FD, a bZIP protein mediating signals from the floral pathway integrator FT at the shoot apex   总被引：5，自引：0，他引：5  

Abe M  Kobayashi Y  Yamamoto S  Daimon Y  Yamaguchi A  Ikeda Y  Ichinoki H  Notaguchi M  Goto K  Araki T 《Science (New York, N.Y.)》2005,309(5737):1052-1056

  相似文献   

Local ordering in the pseudogap state of the high-Tc superconductor Bi2Sr2CaCu2O(8+delta)     

Vershinin M  Misra S  Ono S  Abe Y  Ando Y  Yazdani A 《Science (New York, N.Y.)》2004,303(5666):1995-1998

We report atomic-scale characterization of the pseudogap state in a high-Tc superconductor, Bi2Sr2CaCu2O(8+delta). The electronic states at low energies within the pseudogap exhibit spatial modulations having an energy-independent incommensurate periodicity. These patterns, which are oriented along the copper-oxygen bond directions, appear to be a consequence of an electronic ordering phenomenon, the observation of which correlates with the pseudogap in the density of electronic states. Our results provide a stringent test for various ordering scenarios in the cuprates, which have been central in the debate on the nature of the pseudogap and the complex electronic phase diagram of these compounds.  相似文献   

Detection of antifungal activity in Anemarrhena asphodeloides by sensitive BCT method and isolation of its active compound     

Iida Y  Oh KB  Saito M  Matsuoka H  Kurata H  Natsume M  Abe H 《Journal of agricultural and food chemistry》1999,47(2):584-587

Antifungal activity was detected from Anemarrhena asphodeloides by the Bio-Cell Tracer (BCT) method. An active fraction was separated by silica gel column chromatography and reverse-phase HPLC. The molecular weight was determined by GC-MS, and the molecular structure was analyzed by IR, (1)H NMR, and (13)C NMR. The isolated compound was found to be identical to nyasol, (Z)-1, 3-bis(4-hydroxyphenyl)-1,4-pentadiene, which formerly appeared in the literature without any remark on the antifungal activity. This compound showed antimicrobial activity against 38 strains of fungi and five strains of bacteria. The minimum inhibitory concentration (MIC) ranged from 12.5 to 200 microg mL(-)(1), except for two strains based on the broth dilution method.  相似文献