• Title/Summary/Keyword: Agricultural R and D

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Two New Phenolic Glycosides from Curculigo orchioides

  • Zuo, Ai-Xue;Shen, Yong;Jiang, Zhi-Yong;Zhang, Xue-Mei;Zhou, Jun;Lu, Jun;Chen, Ji-Jun
    • Bulletin of the Korean Chemical Society
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    • v.32 no.3
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    • pp.1027-1029
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    • 2011
  • Two new phenolic glycosides were isolated from the rhizomes of Curculigo orchioides Gaertn.. Based on comprehensive spectroscopic analyses including IR, MS, 1D- and 2D NMR (COSY, HSQC, and HMBC), their structures were elucidated as 3-hydroxyl-5-methyphenol-1-O-[${\beta}$-D-glucopyranosyl-($1{\rightarrow}3$)-${\beta}$-D-glucopyranoside (1) and 1',3'-dimethoxyl-4-hydroxyalangifolioside (2).

Field Study on Mating Confusion of Synthetic Sex Pheromone in the Striped Rice Borer, Chilo suppressalis (Lepidoptera: Pyralidae) (성 pheromone에 의한 이화명나방의 교미교란에 관한 연구)

  • Lee J.O.;Park J.S.;Goh H.G.;Kim J.H.;Jun J.G.
    • Korean journal of applied entomology
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    • v.20 no.1 s.46
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    • pp.25-30
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    • 1981
  • Mating confusion of the Striped Rice Borer with its synthetic sex pheromone, a mixture of (Z)-11-hexadecenal and (Z)-13-octadecenal in a ratio of 4.5 : 1, was estimated during the first and second generation in rice field near Suweon. The mixture was highly disruptive to pheromonal communication between males and females. The orientation behavior of male moths toward the females was confused at a dosage of 29.3g per 30a during the first generation and even at 33rr.g per $20m^3$ during the second generation.

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Occurrence and Symptoms of Tomato spotted wilt virus on Egg Plant, Whole Radish and Sugar Loaf in Korea (채소(가지, 알타리무, 슈가로프)에 발생한 토마토반점위조바이러스 (Tomato spotted wilt virus) 발생과 병징 특성)

  • Cho, Jeom-Deog;Kim, Jin-Young;Kim, Jeong-Soo;Choi, Hong-Soo;Choi, Gug-Seoun
    • Research in Plant Disease
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    • v.16 no.3
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    • pp.232-237
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    • 2010
  • Tomato spotted wilt virus (TSWV) was occurred on the three vegetables of egg plant (Solanum melongena), whole radish (Raphanus acanthiformis) and sugar loaf (Cichorium intybus) at Anyang area infested with TSWV. Whole radish was produced the symptoms of necrotic spots on the leaves, and necrosis and malformation on the roots by TSWV. Egg plant was induced the symptoms of typical multiple ring spots on the leaves and necrotic rings on the fruits. Sugar loaf was infected severely with the typical symptoms of ring spots on the leaves and stunt. The three isolates of TSWV could infect locally on the indicator plants of Chenopodium amaranticolor, C. quinoa and Nicotiana debney, and systemically on N. glutinosa, N. benthamiana and Datura stramonium. Two TSWV isolates from egg plant and sugar loaf were very similar in virulence. However, the virulence of TSWV from whole radish was very different as local infection on 5 Nicotiana species including N. tabacum 'Xanthi NC'.

Effects of Beak Trimming, Stocking Density and Sex on Carcass Yield, Carcass Components, Plasma Glucose and Triglyceride Levels in Large White Turkeys

  • Sengul, Turgay;Inci, Hakan;Sengul, Ahmet Y.;Sogut, Bunyamin;Kiraz, Selahattin
    • Food Science of Animal Resources
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    • v.35 no.6
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    • pp.715-720
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    • 2015
  • This study was conducted to determine the effects of beak trimming, stocking density (D) and sex (S) on live weight (LW), carcass yield and its component, and plasma glucose (PG) and triglyceride levels in Large White turkeys. To accomplish this aims, totally 288 d old large white turkey chicks (144 in each sex) were used. Beaks of 77 male and female poults were trimmed when 8 d old with an electrical beak trimmer. The birds were fed by commercial turkey rasion. Experiment was designed as 2 × 2 × 2 factorial arrangement with 3 replications in each group. Beak trimming and stocking density did not affect live weight, carcass composition and its components. The higher LW and carcass weight observed in trimmed groups. As expected, male birds are heavier than female, and carcass percentage (CP) would be adverse. However, in this study, CP of male was higher in trimmed, in 0.25 m2/bird. (D) × sex (S) interaction had an effect on both CP and thigh weights (p<0.05). Significantly D × S was observed in LW, CP and PG. The weight of carcass and its some components were higher in male. S × D interaction had an effect on plasma glucose level (p<0.05). Triglyceride level was affected (p<0.05) by sex. Significant relationships were found between percentage of thighs (r=0.447, p<0.01) and percentage of breast (r=0.400, p<0.01). According to this study, it can be said that trimming is useful with density of 0.25 m2/bird in turkey fattening.

Effects of Varying Levels of Flaked Corn Starch Abomasally Infused on Nitrogen Retention and the Efficiency of Energy Conversion in Fattening Steers

  • Li, F.C.;Feng, Y.L.;Wang, Z.H.;Lin, H.
    • Asian-Australasian Journal of Animal Sciences
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    • v.13 no.4
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    • pp.470-473
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    • 2000
  • The experiment was carried out to evaluate the effect of varying levels of flaked com abomasally infused on energy metabolism and nitrogen metabolism in fattening steers. The starch levels of flaked corn of abomasally infused were 0, 300, 600 and 900 g/d. Four mature fattening steers fitted with permanent abomasum cannulas were allocated to a $4{\times}4$ Latin square design were fed at 1.2 maintenance requirement a basal diet of Chinese wildrye (Aneurolepidium Chinense). Compared with 0 g/d (control group), digestible nitrogen, retention nitrogen (RN, g/d) and the efficiency of digestible nitrogen converted into retention nitrogen (RN/DN, %) of 300, 600 and 900 g/d groups were higher (p<0.05). The post-ruminal starch digestion of flaked corn were 71.36, 80.27 and 64.71 % when the amounts abomasally infused were 300, 600 and 900 g/d, respectively. When the amount of starch abomasally infused was more than 600 g/d, the post-ruminal digestion of starch decreased. 300, 600 and 900 g/d starch infusion groups showed higher metabolizable energy intake (ME) and net energy gains (NEg, MJ/d) than the control group, and the efficiencies of metabolizable energy converted into body weight (Kf, %) of these groups were higher than the control group by 38.31, 73.18 and 67.06% (p<0.05). Kf (Y, %) had a positive curved relation to starch of flaked com abomasally infused (X, g/d), $Y=36.1605X^{0.0760}$ (n=16, r=0.9308).

Effect of Silkworm Hemolymph Collected Large-scale Bleeding Method in Insect Cell Culture (절피원심법으로 대규모 채취한 누에체액의 곤충세포 증식효과)

  • Choi, Ji-Young;Kim, Jong-Gill;Choi, Young-Cheol;Kim, Sam-Eun;Han, Myung-Sae
    • Journal of Sericultural and Entomological Science
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    • v.49 no.1
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    • pp.28-32
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    • 2007
  • This study was carried out to investigate the utilization of hemolymph of silkworm, Bombyx mori, as a substitute for fetal bovine serum(FBS) in the insect cell culture. Hemolymph is collected on a small scale by clipping the abdominal leg; however, this method is not appropriate for large scale collection. The hemolymph was collected from 5 th instar larva by centrifugation after cutting of the abdominal legs was more appropriate procedure for large scale collection. The cell growth in the medium supplemented with hemolymph(Baekokjam) collected in large scale was almost same as that in the medium hemolymph supplemented with hemolymph collected in small scale. However, the mutant($wE^b$) hemolymph collected in large scale was still less effective in the cell growth, as compared to the Baekokjam hemolymph collected in large scale. The optimum centrifugation condition for large-scale bleeding was 500 rpm and 15 min.

Phylogeographic Messages Encoded in the rDNA of the Commercial Mushroom Zhenghonggu@ From Fujian, China

  • Chen, Yu H.;Chen, Peng D.;Chen, Liu Y.;Ma, Li Z.
    • 한국균학회소식:학술대회논문집
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    • 2014.05a
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    • pp.45-45
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    • 2014
  • Individualities of precious health mushroom called Zhenghonggu@ from respective protections scattered among all main mountains of Fujian China were collected and recognized locally, then compared with Russula griseocarnosa. Their internal transcribed spacer (ITS) region (ITS1, ITS2 and 5.8S rDNA) of the nuclear rDNA were amplified, AMOVA analyzed, nested clade analyzed and then compared with the ITS sequences of relative Russula species from other regions of China to confirm the taxonomic status of Zhenghonggu$^@$ and its population structure. Total 23 haplotypes from different protections of Fujian can be clustered into three clades similar to the three lineages of Dahongjun$^@$ from southeastern China reported by Li et al. The geographic distribution characteristic of these three phylogeny clades may be closely coupled with the vegetation regionalization and/or the differences of coenosium construction of Fagaceae that is the host of Russula griseocarnosa. The correlation of taxonomy, phylogeny and geographical distribution of Russula are discussed.

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Morphological Characteristics of Artificially Cultivated Dictyophora echinovolvata (인공재배한 흰돌기망태버섯(Dictyophora echinovolvata)의 형태적 특징)

  • Cheong, Jong-Chun;Seok, Soon-Ja;Jang, Kab-Yeul;Park, Jeong-Sik;Kim, Yang-Sup;Chung, Bong-Koo
    • The Korean Journal of Mycology
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    • v.30 no.2
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    • pp.73-77
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    • 2002
  • This study was conducted to investigate morphological characteristics of veiled lady mushroom (Dictyophora sp.). Morphological observation of mycelium showed the presence of chlamydospore-like swelling cells, and typical mycelial champ connections. Fruiting body of the veiled lady mushroom consists of cap, velum, stipe, and vulva. Oval-shaped eggs were surrounded by exodermis, gelatin layers and endodermis, and the fruiting bodies remained inside volva as liquid gelatin layer. Dark green spore layer was formed at the top of cap. The surface eggs in the cultivated veiled lady mushroom was covered with white needle-shaped mycelial projection that was oval in shape. The velum of fruiting body stretched down to the top of volva. The net was regularly shaped, and smelled like fragrance with chestnut flower. The strain KACC 50650 was identified as Dictyophora echinovolvata based on the morphology of eggs and fruiting bodies, and named as Huin-Dol-Gi-Mang-Tae mushroom in Korean.