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1.
Passive protection of dogs against clinical disease due to Canine parvovirus-2 by specific antibody from chicken egg yolk 总被引：4，自引：0，他引：4 
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下载免费PDF全文 Sa Van Nguyen Kouji Umeda Hideaki Yokoyama Yukinobu Tohya Yoshikatsu Kodama 《Canadian journal of veterinary research》2006,70(1):62-64
The protective effect of immunoglobulins derived from chicken egg yolk (IgY) against infection by Canine parvovirus 2 (CPV-2) was evaluated in 10 beagle dogs orally challenged with a strain of the virus. The 2-mo-old dogs were divided into 3 groups and treated with powders containing CPV-2 IgY or normal egg yolk for 7 d after the challenge. The 4 dogs receiving normal egg yolk (control group) demonstrated mild symptoms typical of CPV-2 infection, such as vomiting, diarrhea, and weight loss. No symptoms were observed by 16 d after challenge in the 3 dogs receiving 2 g of IgY powder. Of the 3 dogs receiving 0.5 g of IgY powder, 2 had clinical CPV-2 disease; however, the manifestations were less severe than in the control group. Furthermore, the IgY-treated groups had significantly greater weight gain and shorter duration of virus shedding than the control group. These results indicate that IgY is useful in protecting dogs from CPV-2-induced clinical disease. 相似文献
2.
Pasupathy AN Pushp A Gomes KK Parker CV Wen J Xu Z Gu G Ono S Ando Y Yazdani A 《Science (New York, N.Y.)》2008,320(5873):196-201
Identifying the mechanism of superconductivity in the high-temperature cuprate superconductors is one of the major outstanding problems in physics. We report local measurements of the onset of superconducting pairing in the high-transition temperature (Tc) superconductor Bi2Sr2CaCu2O8+delta using a lattice-tracking spectroscopy technique with a scanning tunneling microscope. We can determine the temperature dependence of the pairing energy gaps, the electronic excitations in the absence of pairing, and the effect of the local coupling of electrons to bosonic excitations. Our measurements reveal that the strength of pairing is determined by the unusual electronic excitations of the normal state, suggesting that strong electron-electron interactions rather than low-energy (<0.1 volts) electron-boson interactions are responsible for superconductivity in the cuprates. 相似文献
3.
Motoaki Kusaba Chao-Xi Luo Hiromi Hanamura Masakazu Misaka Taiga Mochida Yoshikatsu Fujita Yukio Tosa 《Journal of General Plant Pathology》2008,74(3):250-253
A Japanese differential rice cultivar K60 was tested with 114 F1 cultures of Magnaporthe oryzae from a cross between isolates 84R-62B and Y93-245c-2. Segregation patterns of avirulence and virulence in the progeny suggested
that avirulence on cv. K60 was controlled by a single gene derived from 84R-62B and tentatively named AvrK60. In the F1 population, AvrK60 cosegregated with avirulence gene AvrPik on a small 1.6-Mb chromosome of 84R-62B and with the 1.6-Mb chromosome itself. Therefore, we suggest that, along with AvrPik, AvrK60 is also located on the 1.6-Mb chromosome of 84R-62B. 相似文献
4.
Genda Singh Abha Rani N. Bala S. Shukla Sheraram Baloch N. K. Limba 《Frontiers of Agriculture in China》2010,4(2):145-158
Recent decline in biological diversity has stimulated the research on the effects of resource conservation on biodiversity
and vice versa. We examined soil water and nutrients influenced by rainwater harvesting (RWH) in hillslope and its effects
on herbage diversity and productivity at up (USP), middle (MSP) and lower position (LSP) in 75 plots, each of 700-m2 area laid in < 10%, 10%–20% and > 20% slopes, respectively. The five RWH treatments were Contour trench (CT), Gradonie (G),
Box trench (BT), V-ditch (VD) and control. Soil water content (SWC), species number, population, diversity and herbage yield
increased (P < 0.05) downward suggesting positive relations between soil resource and diversity/productivity. The highest species number,
population, richness and diversity in 10%–20% slope were associated with soil water usage and NO3-N and NH4-N concentrations. SWC was 5.0%–19.0% greater in RWH areas than in control influencing herbage species, population,
growth and yields. The increase in diversity and yields was the highest (P < 0.05) in V-ditch reinforced by soil fertility. The positive effect of diversity on yield increased with resources, and
the effect was compositional rather than that of species richness. Conclusively, slope gradient and soil texture influenced
herbage regeneration, diversity and productivity, which were positively affected by existing soil fertility and applied RWH
and mobilizing soil water and nutrients. The effect of V-ditch was the highest on composition and yield. Thus, RWH enhanced
herbaceous vegetation and restoration of degraded forest/rangelands. But long-term effects of diversity in restoring ecosystem
productivity could be established through long-term data collections on optimum water/nutrient usage, diversity and productivity. 相似文献
5.
Bilas Singh Mahipal Bishnoi Mana Ram Baloch Genda Singh 《Archives of Agronomy and Soil Science》2013,59(8):1031-1049
A combination of silvicultural species [Prosopis cineraria (L.), Ailanthus excelsa Roxb. and Colophospermum mopane (J. Kirk ex Benth.)] were planted with horticultural species [Ziziphus mauritiana (L.), Cordia myxa (Forster), and Emblica officinalis (Gaertn)] and intercropped with wheat (Triticum aestivum). Z. mauritiana +P. cineraria combination produced greater fruit, fodder and fuel wood and was less competitive to wheat crop. Crop yield reduced by 5% to 23% in the agroforestry systems than the yield in sole crop plot. Lowest yield was in C. mopane + C. myxa combination. Fodder yield was 0.53, 0.20 and 0.07 t ha?1 from C. mopane (cursive), P. cineraria and A. excelsa, respectively, whereas utilizable biomass was 2.63 t ha?1 from C. myxa (cursive) + P. cineraria, 2.21 t ha?1 from C. myxa (cursive) + C. mopane and 2.18 t ha?1 from Z. mauritiana + P. cineraria combinations. Soil organic carbon and NH4–N increased (by 7% and 8%, respectively), whereas NO3–N and PO4–P decreased in agroforestry compared to the sole tree plots. Primary root attributes of P. cineraria, A. excelsa and C. mopane were higher in agroforestry and mostly concentrated in the top 0–25 cm of the soil layer. Z. mauritiana + P. cineraria were the best combination with minimum yield reduction and were found to be beneficial in enhancing soil fertility. 相似文献
6.
Elzbieta G Magnucka Yoshikatsu Suzuki Stanislaw J Pietr Arkadiusz Kozubek Robert Zarnowski 《Pest management science》2009,65(10):1065-1070
BACKGROUND: Cycloate inhibits the biosynthesis of very‐long‐chain fatty acids, the essential constituents of plant waxes and suberin. Fatty acids also serve as precursors of aliphatic carbon chains in resorcinolic lipids, which play a fundamental role in the plant defence system against fungal pathogens. In this study, the effect of cycloate on the biosynthesis of 5‐n‐alkylresorcinols in rye seedlings (Secale cereale L.) grown under various light and thermal conditions was examined. RESULTS: The content of alkylresorcinols biosynthesised in rye was generally increased by the herbicide in both green and etiolated plants. The presence of cycloate also affected patterns of alkylresorcinol homologues in plants grown at 15 and 22 °C; very‐long‐side‐chain compounds were less abundant, whereas both short‐chain saturated and unsaturated homologues were generally accumulated. No cycloate‐related effects caused by homologue pattern modifications were observed at elevated temperature. CONCLUSION: This study extends present understanding of the mode of action of thiocarbamate herbicides. Cycloate markedly affected the biosynthesis of very‐long‐side‐chain resorcinolic lipids in rye seedlings, confirming the existence of parallels in both fatty acid and alkylresorcinol biosynthetic pathways. The observed cycloate‐driven accumulation of 5‐n‐alkylresorcinols may improve the resistance of cereals to infections caused by microbial pathogens. Copyright © 2009 Society of Chemical Industry 相似文献
7.
稻瘟病菌致病性遗传研究初报——云南省稻瘟病菌有性世代研究之五 总被引：1，自引：0，他引：1
本文报道龙爪稷分离菌G10-1马水稻分离菌后代菌性2145-R-57-1交配产生的同一子囊中分离出的子囊孢子致病性及交配型分离情况.交配型分离比1:1;但致病性分离情况比较复杂.很多子囊孢子菌株失去亲本菌株对供试水稻和龙爪稷的致病性,少数菌株获得亲本菌株所没有的致病性.对稻瘟病菌致病性的遗传尚需作大量分析工作. 相似文献
8.
The sulfated peptide phytosulfokine (PSK) is an intercellular signal that plays a key role in cellular dedifferentiation and proliferation in plants. Using ligand-based affinity chromatography, we purified a 120-kilodalton membrane protein, specifically interacting with PSK, from carrot microsomal fractions. The corresponding complementary DNA encodes a 1021-amino acid receptor kinase that contains extracellular leucine-rich repeats, a single transmembrane domain, and a cytoplasmic kinase domain. Overexpression of this receptor kinase in carrot cells caused enhanced callus growth in response to PSK and a substantial increase in the number of tritium-labeled PSK binding sites, suggesting that PSK and this receptor kinase act as a ligand-receptor pair. 相似文献
9.
Yoshikatsu Genda Kyoko Sato Osamu Nunomura Tetsuo Hirabayashi Shinya Tsuda 《Journal of General Plant Pathology》2011,77(3):201-208
The location of Pepper mild mottle virus (PMMoV) within seeds as they developed on inoculated seedlings of pepper (Capsicum annuum) was followed over time by detecting the viral coat protein using immunofluorescence microscopy. Seedlings were inoculated
with PMMoV when the flower buds on the first and second branching nodes were in bloom. Fluorescence indicating the presence
of PMMoV was first observed around immature seeds and placentas in the ovaries on the fourth branching node at 20 days post-anthesis
(20 DPA), which corresponded to 39 days post-inoculation (39 DPI). The area with fluorescence gradually expanded from the
placenta into the integument and the parenchyma, and finally reached the tip of the immature seeds by 34 DPA (53 DPI). The
embryo or endosperm beyond the endothelium never fluoresced during the experiment [i.e., ending at 81 DPA (102 DPI)]. For
visualizing viral routes of invasion from seeds into new seedlings, PMMoV-infected C. annuum seeds that were heterozygous for the L
3
tobamovirus-resistance gene were sown in soil at 30°C. After ~2 weeks, the cotyledon developed virally induced necrosis.
These findings shed light on the infection cycle of PMMoV through vertical transmission in C. annuum. 相似文献
10.
Akemi YAMAMOTO Minoru ITOH Yoshikatsu KADOYA Hirokazu KANNO Michi YAMADA Shu FURUYA 《Animal Science Journal》2002,73(4):301-304
An experiment was conducted to determine the effects of supplementing a reduced crude protein (CP) diet with apple pomace on the urinary nitrogen excretion and ammonia emission from slurry in the growing pigs. Four barrows (35 kg bodyweight) were assigned to one of two diets. Each pig was placed in a metabolism cage and fed a low CP, amino acid-supplemented diet (CP 11.33%; low CP diet) or a low CP, amino acid-supplemented diet containing 23.08% dried apple pomace (CP 9.47%; apple pomace diet) for two 14-day experimental periods. After the completion of the first period, the pigs were switched to the other diet. Urine and feces were quantitatively collected daily for 5 days after a 9-day adaptation period. The daily nitrogen intake for the low CP diet and the apple pomace diet was 17.76 g/pig and 18.64 g/pig, respectively. The pigs fed the apple pomace diet excreted more fecal nitrogen (6.86 g/day) than the pigs fed the low CP diet (3.63 g/day) ( P < 0.001), but urinary nitrogen excretion with the apple pomace diet was 3.11 g/day, which was much lower than that for the low CP diet (5.95 g/day) ( P < 0.001). The daily ammonia emission from the mixture of urine and feces determined by an in vitro method was much lower for pigs fed the apple pomace diet (120 mg) than that for pigs fed the low CP diet (603 mg) ( P < 0.01). The addition of apple pomace to a reduced CP, amino acid-supplemented diet reduces urinary nitrogen excretion and thereby ammonia emission. 相似文献