Migration of Bursaphelenchus xylophilus in cortical and xylem axial resin canals of resistant pines          下载免费PDF全文

J. A. Son  N. Matsushita  T. Hogetsu 《Forest Pathology》2015,45(3):246-253

Migration of the pine wood nematode (PWN), Bursaphelenchus xylophilus, in susceptible and resistant pines was investigated at the tissue level. PWN was inoculated onto the top cross‐cut surface of 20‐cm stem cuttings of susceptible Pinus thunbergii and resistant pines (P. strobus, P. rigida and P. thunbergii of a resistant family Namikata‐(t)‐73 (half‐sib)). PWNs were mainly distributed in cortical resin canals of susceptible P. thunbergii down to 15 cm from the inoculated surface by 6 h after inoculation (HAI) and all tissues (including cortical and xylem resin canals) down to the bottom at 192 HAI. In P. strobus, P. rigida and P. thunbergii family Namikata‐(t)‐73 (half‐sib), PWN was distributed in cortical resin canals down to 5 cm by 6 HAI and down to the base at 192 HAI. However, the distribution of PWN in xylem resin canals of the resistant pines was restricted near inoculated surfaces down to 5 cm, even at 192 HAI. These results demonstrated that migration of PWN in resistant pines was slowed in cortical resin canals and restricted in xylem axial resin canals, features which may be associated with the resistance.  相似文献   

Congenital Methemoglobinemia in a Dog with a Promoter Deletion and a Nonsynonymous Coding Variant in the Gene Encoding Cytochrome b 5     

J.A. McKenna  J. Sacco  T.T. Son  L.A. Trepanier  M.B. Callan  J.W. Harvey  J.W. Arndt 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2014,28(5):1626-1631

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Gosses bluff impact structure, australia     

Milton DJ  Glikson AY  Manwaring EA  Moss FJ  Sedmik EC  Son JV  Barlow BC  Brett R  Young GA 《Science (New York, N.Y.)》1972,175(4027):1199-1207

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Global metabolomic analysis of blood from mice infected with Brucella abortus     

Son Hai VU  Bomin KIM  Alisha Wehdnesday Bernardo REYES  Tran Xuan Ngoc HUY  John Hwa LEE  Suk KIM  Hyun-Jin KIM 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2021,83(3):482

To better understanding Brucella abortus infection, serum metabolites of B. abortus-infected and -uninfected mice were analyzed and twenty-one metabolites were tentatively identified at 3 and 14 days post-infection (d.p.i.). Level of most lysophosphatidylcholines (LPCs) was found to increase in infected mice at 3 d.p.i., while it was decreased at 14 d.p.i. as compared to uninfected mice. In contrast, acylcarnitines were initially reduced at 3 d.p.i then elevated after two-weeks of infection, while hydroxysanthine was increased at 14 d.p.i. in infected mice. Our findings suggest that the significant changes in LPCs and other identified metabolites may serve as potential biomarkers in acute phase of B. abortus infection.  相似文献   

Kinetic study of oxalic acid inhibition on enzymatic browning   总被引：6，自引：0，他引：6  

Son SM  Moon KD  Lee CY 《Journal of agricultural and food chemistry》2000,48(6):2071-2074

Oxalic acid has a strong antibrowning activity. The inhibitory pattern on catechol-PPO model system appeared to be competitive, with a K(i) value of 2.0 mM. When the PPO was incubated with oxalic acid, the activity was not recovered via dialysis, but the inactivated enzyme partially recovered its activity when cupric ion was added. Comparing the relative antibrowning effectiveness of oxalic acid with other common antibrowning agents, oxalic acid with I(50) value of 1.1 mM is as effective as kojic acid and more potent than cysteine and glutathione.  相似文献   

Comparison of a high oleic acid soybean line to cultivated cultivars for seed yield,protein and oil concentrations     

Hyun-Jee Kim  Bo-Keun Ha  Keon-Soo Ha  Jong-Hyun Chae  Ji-Ho Park  Min-Su Kim  Sovetgul Asekova  J. Grover Shannon  Chang-Ki Son  Jeong-Dong Lee 《Euphytica》2015,201(2):285-292

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Culture-based fisheries in small reservoirs in northern Vietnam: effect of stocking density and species combinations     

Hai Son Nguyen  Anh T Bui  Dieu Q Nguyen  Dung Q Truong  Luu Thanh Le  Nigel W Abery  & Sena S De Silva 《Aquaculture Research》2005,36(11):1037-1048

This study was conducted in 20 reservoirs, ranging in size from 4 to 30 ha, in the mountainous, northern region of Vietnam, in ThaiNguyen and YenBai provinces, over two growth cycles in 2002/03 and 2003/04. The reservoirs are leased by farmers for fishery activities from the provincial administration, and the trials were managed by the lessee farmers. Three species combinations in ratios (by fingerling weight) of grass carp: silver carp: bighead carp: common carp: mrigal 1:2:1:1:3 (A), 1:3:1:1:2 (B) and 1:2:1:1:2 (C) were used as seed stock. The overall mean yield of stocked fish in 2002/03 and 2003/04 growth cycles in reservoirs in ThaiNguyen and YenBai provinces was 165 (±21) and 190 (39), and 287 (±22) and 325 (±24) kg ha^?1 respectively. The yield in reservoirs in both provinces, in both growth cycles and irrespective of the species combinations, increased in relation to stocking density. In reservoirs in ThaiNguyen Province, the species combination B gave the lowest yield (both growth cycles and overall), and differed significantly (P<0.05) from combinations A and C. The stocking efficiency (ratio of the yield of stocked fish in kg ha^?1 to the weight of the stocked fish in kg ha^?1) in reservoirs in ThaiNguyen Province ranged from 2.9 to 5.1 over the two growth cycles and that in YenBai from 2.8 to 3.9. There was no discernible trend between growth cycles and/or between species combinations. The major cost incurred was for fingerling procurement. In all instances, a net profit was accrued. The mean (±standard error (SE)) net profit ha^?1 (in 10³VN dong; approximately 15 500 VND=1 US$) was 885 (±270) and 864 (±214), and 1322 (±176) and 1600 (±150) for the growth cycles 2002/03 and 2003/04 for reservoirs in ThaiNguyen and YenBai provinces respectively. Between the two growth cycles, the net profit increased in eight and three reservoirs from YenBai and ThaiNguyen, respectively, the maximum increase being recorded in Khuan Gio (165%) and Dong Man (39%) reservoirs.  相似文献   

Soil-solution chemistry in a low-elevation spruce-fir ecosystem,Howland, Maine     

Ivan J. Fernandez  Gregory B. Lawrence  Yowhan Son 《Water, air, and soil pollution》1995,84(1-2):129-145

Soil solutions were collected monthly by tension and zero-tension lysimeters in a low-elevation red spruce stand in east-central Maine from May 1987 through December 1992. Soil solutions collected by Oa tension lysimeters had higher concentrations of most constituents than the Oa zero-tension lysimeters. In Oa horizon soil solutions growing season concentrations for SO₄, Ca, and Mg averaged 57, 43, and 30 μmol L^?1 in tension lysimeters, and 43, 28, and 19 μmol L^?1 in zero-tension lysimeters, respectively. Because tension lysimeters remove water held by the soil at tensions up to 10 kPa, solutions are assumed to have more time to react with the soil compared to freely draining solutions collected by zero-tension lysimeters. Solutions collected in the Bs horizon by both types of collectors were similar which was attributed to the frequency of time periods when the water table was above the Bs lysimeters. Concentrations of SO₄ and NO₃ at this site were lower than concentrations reported for most other eastern U.S. spruce-fir sites, but base cation concentrations fell in the same range. Aluminum concentrations in this study were also lower than reported for other sites in the eastern U.S. and Ca/Al ratios did not suggest inhibition of Ca uptake by roots. Concentrations of SO₄, Ca, K, and Cl decreased significantly in both the Oa and Bs horizons over the 56-month sampling period, which could reflect decreasing deposition rates for sulfur and base cations, climatic influences, or natural variation. A longer record of measured fluxes will be needed to adequately define temporal trends in solution chemistry and their causes.  相似文献   

Withanolides from the rhizomes of Dioscorea japonica and their cytotoxicity     

Kim KH  Choi SU  Choi SZ  Son MW  Lee KR 《Journal of agricultural and food chemistry》2011,59(13):6980-6984

Edible yams are tropical crops that serve as important staple foods in many parts of the world. The rhizome of Dioscorea japonica , well-known as "Japanese yam", is a food and medicinal source known as "San Yak" in Korea. Bioassay-guided fractionation and chemical investigation of the extract of this yam resulted in the identification of two new withanolides, named dioscorolide A (1) and dioscorolide B (2). The structures of these new compounds were determined by spectroscopic methods, including 1D and 2D nuclear magnetic resonance (NMR) techniques, high-resolution mass spectrometry (HRMS), and chemical methods. The cytotoxic activities of the isolates (1 and 2) were evaluated by determining their inhibitory effects on four human tumor cell lines (A549, SK-OV-3, SK-MEL-2, and HCT15) and a human normal cell line (HUVEC) using a sulforhodamine B (SRB) bioassay. Compounds 1 and 2 showed cytotoxicity against tumor cell lines (A549, SK-OV-3, SK-MEL-2, and HCT15) with IC(50) values ranging from 6.3 to 26.9 μM and exhibited lower activity against the normal cell line (HUVEC) with IC(50) values ranging from 27.1 to 28.8 μM, suggesting selective toxicity among tumor and normal cells.  相似文献   

Protective Effects of Platycodon grandiflorum Aqueous Extract on Thioacetamide-induced Fulminant Hepatic Failure in Mice     

Lim JH  Kim TW  Park SJ  Song IB  Kim MS  Kwon HJ  Cho ES  Son HY  Lee SW  Suh JW  Kim JW  Yun HI 《Journal of toxicologic pathology》2011,24(4):223-228

The aim of the present study was to evaluate the protective activity of aqueous extract from Platycodon grandiflorum (BC703) on thioacetamide (TA)-induced hepatotoxicity in mice. We found that BC703 significantly decreased mortality and the change in serum transaminase following TA administration. The group treated with BC703 at doses of 1, 5, and 10 mg/kg produced significant hepatoprotective effects against TA-induced liver damage by decreasing the activities of serum enzymes, nitric oxide and lipid peroxidation in dose-dependent manners. Histopathological studies further substantiated the protective effect of BC703. These results show the hepatoprotective activity of aqueous extract from Platycodon grandiflorum on thioacetamide-induced fulminant hepatic failure.  相似文献