CT variants of the caudal vena cava in 121 small breed dogs     

Chanyoung Ryu  Sooyoung Choi  Hojung Choi  Youngwon Lee  Kija Lee 《Veterinary radiology & ultrasound》2019,60(6):680-688

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Comparison of cardiac function and coronary angiography between conventional pigs and micropigs as measured by multidetector row computed tomography     

Young Keun Ahn  Jung Min Ryu  Hea Chang Jeong  Yun Hyeon Kim  Myung Ho Jeong  Min Young Lee  Sang Hun Lee  Jae Hong Park  Seung Pil Yun  Ho Jae Han 《Journal of veterinary science (Suw?n-si, Korea)》2008,9(2):121-126

Pigs are the most likely source animals for cardiac xenotransplantation. However, an appropriate method for estimating the cardiac function of micropigs had not been established. Computed tomography (CT) analysis aimed at estimating cardiac function and assessing the coronary arteries has not been carried out in micropigs. This study determined the feasibility of evaluating cardiac function in a micropig model using multidetector row computed tomography (MDCT) and compared the cardiac function values with those of conventional pigs. The mean age of the conventional pigs and micropigs was approximately 80 days and approximately 360 days, respectively. The mean body weight in the conventional pigs and micropigs was 29.70 ± 0.73 and 34.10 ± 0.98 kg, respectively. Cardiac MDCT detected ejection fractions of 52.93 ± 3.10% and 59.00 ± 5.56% and cardiac outputs of 1.46 ± 0.64 l/min and 1.21 ± 0.24 l/min in conventional pigs and micropigs, respectively. There were no significant differences in cardiac function between conventional pigs and micropigs in the reconstructed CT images. There were also no differences in the coronary angiographic images obtained by MDCT. It is expected that the results of this study will help improve understanding of cardiac function in micropigs. The data presented in this study suggest that MDCT is a feasible method for evaluating cardiac function in micropigs.  相似文献   

Occurrence of Cucumber mosaic virus Subgroup IA in tomato in Pakistan     

Akhtar  K. P.  Ryu  K. H.  Saleem  M. Y.  Asghar  M.  Jamil  F. F.  Haq  M. A.  Khan  I. A. 《植物病害和植物保护杂志》2008,115(1):2-3

Journal of Plant Diseases and Protection - Infection of tomato in Faisalabad, Pakistan with subgroup IA strain of Cucumber mosaic virus (CMV) is reported for the first time. The virus was detected...  相似文献   

Dispersion polymerization of styrene using poly(4-vinylpyridine) macro-RAFT agent under UV radiation     

Boram Ki  Young Chang Yu  Hyun Jeong Jeon  Woong-Ryeol Yu  Hee Wook Ryu  Ji Ho Youk 《Fibers and Polymers》2012,13(1):135-138

The dispersion polymerization of styrene using a poly(4-vinylpyridine) (P4VP) macromolecular RAFT (macro-RAFT) agent as both a macro-initiator and a colloidal stabilizer under UV radiation was investigated for the first time. The P4VP macro-RAFT agent (M _n,GPC=49,000 g/mol, PDI=1.14) was prepared by the RAFT polymerization of 4-vinylpyridine using 2-cyanoprop-2-yl dithiobenzoate as a chain transfer agent. The resulting polystyrene (PSt) particles had hairy P4VP chains, which could successfully immobilize very small Au nanoparticles on the surface of the PSt particles. It was found that hairy polymeric particles could be produced by photo-initiated dispersion polymerizations of vinyl monomers using macro-RAFT agents that are susceptible to UV radiation as both macro-initiators and colloidal stabilizers.  相似文献   

A codominant SCAR marker linked to the genic male sterility gene (ms₁) in chili pepper (Capsicum annuum)     

J. Lee    J. B. Yoon    J.-H. Han    W. P. Lee    J. W. Do    H. Ryu    S. H. Kim    H. G. Park 《Plant Breeding》2010,129(1):35-38

As one of the genic male sterility (GMS) materials in chili pepper ( Capsicum annuum L.), GMS1 has been used for commercial F₁ hybrid seed production. The male sterility of GMS1 is controlled by a recessive nuclear gene, named ms ₁ . In this study, we developed DNA markers linked to the ms ₁ locus using a combination of bulked segregant analysis and amplified fragment length polymorphism (AFLP) in a segregating sibling population. From the screening of 1024 AFLP primer combinations, the AFLP marker E-AGC/M-GTG (514 bp) was identified as being linked to the ms ₁ locus at a distance of about 3 cM. Based on internal sequencing analysis of the E-AGC/M-GTG marker between male fertile and sterile plants, we identified three small deletions with a size of altogether 42 bp in the male-fertile plant and developed a codominant sequence characterized amplified region (SCAR) marker. This SCAR marker may be valuable for marker-assisted breeding in the hybrid seed production system of chili pepper using the GMS1 line.  相似文献   

Observation of spinline behavior of dual nozzle electrospinning and its fiberweb morphology     

Geun Sang Ryu  Jung Teak Oh  Hyungsup Kim 《Fibers and Polymers》2010,11(1):36-41

The spinline behavior in dual nozzle electrospinning was observed using high shutter speed photography and laser scattering technique. It was found that the spinlines of each nozzle have skewed bell shapes. The solution concentration, the number of nozzles, the nozzle-to-nozzle distance (NND) showed significant effects on both the spinline shape and the fiberweb morphology. They were also resulted from the inter- and the intra-spinline repulsive forces. Especially the fibers collected in the middle of the collecting plate were oriented along the tangential direction to the two webs spun from each nozzle.  相似文献   

Hand and mechanical properties of stretch fabrics     

Hyun-Ah Kim  Hyo-Seon Ryu 《Fibers and Polymers》2008,9(5):574-582

This paper discusses the hand and preference of stretch fabrics for sportswear through subjective and objective hand evaluations. Twenty-two varieties of stretch fabrics for fall/winter sportswear fabrics were used. Seven main factors were classified through subjective evaluation and total cumulative variance value was 68.28 %. According to correlations between objective hand and preference, there are differences in preferences for pants and shirts, and in response to preference for shirts, no gender differences are observed. Correlations between subjective hand and preference show that there is a similar tendency in preferences for pants and shirts regardless of usage by different genders.  相似文献   

Life cycle greenhouse gas emission of wooden guardrails: a study in Nagano Prefecture     

Ryu Noda  Chihiro Kayo  Masato Yamanouchi  Naoaki Shibata 《Journal of Wood Science》2016,62(2):181-193

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Diet of late larval Japanese anchovy Engraulis japonicus in the Kii Channel, Japan     

Naotaka Yasue  Ryu Doiuchi  Yo Yoshimoto  Terufumi Takeuchi 《Fisheries Science》2010,76(1):63-73

The diet of late larval (standard length 17.0–24.9 mm) Japanese anchovy Engraulis japonicus collected from the Kii Channel between April 2007 and March 2008 was analyzed. The main prey items found in the gut were copepods, and the composition of the gut contents changed on a monthly basis. The most important prey items were Calanoida (unidentified) from June to August and in October–November, Oncaea in March, April, and September, and Oithona in December and January. The prey selectivity analysis demonstrated that the selectivity for a particular prey category was not consistent throughout the months. It was considered that late larval anchovy may actually have no preference for a particular prey category. The major size (body width) of the prey items consumed fell within the range of 0.10–0.40 mm throughout almost the whole year. Late larvae tended to select relatively larger prey items from the environment. The relationship between the seasonal variabilities in diet and the fishery catch of anchovy “shirasu” (larvae of anchovy) is also discussed.  相似文献   

Prescribed burning and mechanical thinning effects on belowground conditions and soil respiration in a mixed-conifer forest,California     

Soung-Ryoul Ryu  Amy Concilio  Jiquan Chen  Malcolm North  Siyan Ma 《Forest Ecology and Management》2009

Soil respiration (R_S) is a major carbon pathway from terrestrial ecosystems to the atmosphere and is sensitive to environmental changes. Although commonly used mechanical thinning and prescribed burning can significantly alter the soil environment, the effect of these practices on R_S and on the interactions between R_S and belowground characteristics in managed forests is not sufficiently understood. We: (1) examined the effects of burning and thinning treatments on soil conditions, (2) identified any changes in the effects of soil chemical and physical properties on R_S under burning and thinning treatments, and (3) indirectly estimated the changes in the autotrophic soil respiration (R_A) and heterotrophic soil respiration (R_H) contribution to R_S under burning and thinning treatments. We conducted our study in the Teakettle Experimental Forest where a full factorial design was implemented with three levels of thinning, none (N), understory thinning (U), and overstory thinning (O; September to October 2000 for thin burn combination and June and July 2001 for thin only treatments) and two levels of burning, none (U) and prescribed burning (B; fall of 2001). R_S, soil temperature, soil moisture, litter depth, soil total nitrogen and carbon content, soil pH, root biomass, and root nitrogen (N) concentration were measured between June 15 and July 15, 2002 at each plot. During this period, soil respiration was measured three times at each point and averaged by point. When we assumed the uniform and even contribution of R_A and R_H to R_S in the studied ecosystem without disturbances and a linear relationship of root N content and R_A, we calculated the contributions of R_A to R_S as 22, 45, 53, 48, and 45% in UU, UO, BN, BU, and BO, respectively. The results suggested that after thinning, R_S was controlled more by R_H while after burning R_S was more influenced by R_A. The least amount of R_S variation was explained by studied factors under the most severe treatment (BO treatment). Overall, root biomass, root N concentration, and root N content were significantly (p < 0.01) correlated with soil respiration with correlation coefficients of 0.37, −0.28, and 0.29, respectively. This study contributes to our understanding of how common forestry management practices might affect soil carbon sequestration, as soil respiration is a major component of ecosystem respiration.  相似文献