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수수×수단그라스 교잡종(Sorghum bicolor(L) Moench)과 대두(Glycine Max(L.) Merr) 간작이 생육특성 및 토양의 이화학적 성분에 미치는 영향
이상무,전병태 한국축산학회 1996 한국축산학회지 Vol.38 No.2
This experiment was carried out to determine the growth characteristic, dry matter production, crude protein yield and palatability in intercropping and pure culture. The treatments were pure vulture$lt;Sorghum × Sudangrass hybrid(Tl), Soybean (T2)$gt; and intercropping culture [Sorghum × Sudangrass hybrid$lt;T3(1)$gt; + Soybean$lt;T3(2)$gt; = T3]. The experiment was performed at the College of Natural Science of Kon-Kuk University in Chungu from 1989 to 1991. The results obtained from these experiments are as follows ; 1. In plant length, leaf length and leaf width of the sorghum × sudangrass hybrid(S.S.H)' T3(1) was higher than T1 during the experimental period(1989-1991). Also, growth characteristics of soybeans had the same tendency. 2. In the soybean and S.S.H, the number of leaves of T3(1,2) was higher compared with T1 and T2, but in the stem hardness, T2 was harder than T3(2) and T3(1) was harder than T1 in S.S.H. 3. In T3, the leaf ratio of S.S.H decreased but that of soybeans increased. However resistance to lodging of S.S.H increased and soybeans decreased. 4. In T3, S.S.H showed an increase in the number of tillers, while rate of dead stubble decreased. 5. In the first cutting time, palatabilities were 100, 71, 21% on T2, T3 and T1, respectively. but at the 2nd and 3rd cutting time, there was no difference between TI and T3. 6. Dry matter production of T1 was the highest, but the extent of yield depression was highly increased according to the times of the year. While, in T3, it was slightly increased and the yield of three years was similar to pure T1(T1 : T3 = 15,202 : 14,977㎏/㏊). 7. In protein yield, T3 was higher than pure culture(T1, T2). 8. In the change in chemical characteristics of soil, T3 was higher than T1 in the pH, organic matter, avail. P₂O_5 and total nitrogen. T3 was better than T1 for soil improvement and maintenance
Kang, S.W.,Doan, H.T.T.,Noh, J.H.,Choe, S.E.,Yoo, M.S.,Kim, Y.H.,Reddy, K.E.,Nguyen, T.T.D.,Van Quyen, D.,Nguyen, L.T.K.,Kweon, C.H.,Jung, S.C. Elsevier 2013 Parasitology international Vol.62 No.6
Toxoplasma gondii and Trichinella spiralis are important zoonotic pathogens with worldwide distributions. In Korea, several outbreaks of human toxoplasmosis and trichinellosis due to the consumption of infected wild animals have been reported. The purpose of this study was to determine the seroprevalence of T. gondii and T. spiralis infections in wild boars killed in Korea from December 2009 to October 2011. A total of 521 wild boars hunted in eight provinces were examined for antibodies to T. gondii and T. spiralis by using commercial ELISA kits. Overall, 25.1% of serum samples from individual boars were seropositive for T. gondii and 1.7% were seropositive for T. spiralis. Seropositive for T. gondii was found in the boars in all the eight provinces investigated and for T. spiralis in four provinces. This is the first report on the seroprevalence of T. gondii and T. spiralis infections in wild boars in Korea. The consumption of undercooked wild boar meat may expose humans to a high risk of infection.
Park, S. H.,Lee, B. R.,Lee, J. H.,Kim, T. H. Springer Science + Business Media 2016 Plant growth regulation Vol.79 No.3
<P>To assess the roles of sulfur (S) nutrition in salt stress tolerance in Kentucky bluegrass (Poa pratensis L.). The plants grown in S-supplied or S-deprived condition for 4 weeks were exposed to salt stress with 100 mM NaCl or non-salt stress, respectively, for 21 days. Osmotic potential was significantly decreased by salt stress from day 14. Photosynthetic pigments such as chlorophyll and carotenoid were decreased by salt stress which was more severe in the absence of S, but their content was largely recovered in the presence of S-nutrition. The proteomic analysis of multi-protein complexes in the thylakoid by BN-PAGE showed that the expression of PSI, PSII and RuBisCo level was repressed under salt stress in the absence of S, whereas their expression was largely recovered by S supply. Enzymatic activity confirmed the responses of RuBisCo, estimated by the BN-PAGE, showing a decreased activity in S-deprived and/or salt stressed levels. The decreased RuBisCo activity was significantly related to S content as affected by S nutrition and/or salt stress. Significant relationship between S content and Na, K, Fe content was also observed. These results indicate that S-nutrition modulates the negative responses to salt stress tolerance in photosynthetic organelles of P. pratensis.</P>
포장방법과 저장조건이 돈육 등심의 저장성 및 보수력에 미치는 영향
허선진,주선태,오성현,김영직,김영환,이정일,박구부 한국동물자원과학회 2001 한국축산학회지 Vol.43 No.1
To investigate the effects of packaging method and storage condition on meat quality, a total of eight pork loins were selected from a commercial meat plant at 24 hr postmortem. The loins were cut to 2.5㎝ thick steaks and were randomly assigned to the five treatment combination; vacuum packaging and submersion in chilled salt water(SCSW)(T1), non-vacuum packaging and submersion in chilled salt water (T2), vacuum packaging and storage in conventional refrigerator(SCR)(T3), non-vacuum packaging and storage in conventional refrigerator(T4), and wrap packaging and storage in conventional refrigerator(TS). All samples were stored at 0℃ for 20 days to measure color of meat(CIE L*, a*. b*), pH, drip loss, purge loss %, lipid oxidation (TBARS; thiobarbituric acid reactive substances) and total plate counts (TPC). CIE L* and b* value of SCSW(T1, 2) samples were significantly(P$lt;0.05) lower than SCR samples when they were measured at storage 20 days. The sample of SCSW(T1, 2) showed significantly(P$lt;0.05) lower pH than those of SCR(T3, 4, 5) during storage. The sample of SCSW(T1, 2) showed significantly(P$lt;0.05) higher Drip loss than those of SCR(T3, 4, 5) during 5 days storage. T2 showed the lowest purge loss % whereas T3 remarked the highest purge loss %. The samples of SCSW showed significantly(P$lt;0.05) lower TBARS than those of SCR during storage. TPC was samples of SCSW(T1, 2) showed significantly(P$lt;0.05) lower than other treatments. These results suggested that NVP(non-vacuum packaging) and SCSW could reduce purge loss and discoloration, and extend shelf-life of pork loin.
Sorghum × Sudangrass hybrid 의 입모저장에 관한 연구 ; 1 . 입모저장기간이 생육특성 및 기호성 변화에 미치는 영향
이상무 ( S M Lee ),문상호 ( S H Moon ),백인철 ( I C Baek ),전병태 ( B T Jeon ) 한국축산학회 1994 한국축산학회지 Vol.36 No.1
Growth characteristics and palatability by different harvesting dates were measured in order to determine its availability and effective storage period when sorghum × sudangrass hybrid were stored as foggage. Experiment was carried out with six treatments as follows; T1, T2 and T3 were foggaged at 120, 160 and 200㎝ in plant length and T4, T5 and T6 were foggaged at boot, milk and dough stage on 7 october after regrowth respectively. Rice straw was offered to examine the relative palatability a, control. 1. Growth characteristics such as plant length, leaf length, leaf width, leaf number and stem hardness were decreased with prolongation of foggage period at all treatments. Especially, decrease and falling ratio were a heigher at T5 and T6 than the other treatments. 2. Greeness grade of leaf showed fast decoloration at TI and T2 treatments, but stem showed fast decoloration at TS and T6 treatments. Leaf and stem decolorized in mid-October and mid-november in all treatments. 3. Leaf ratio was deceased with prolongation of foggage period, but stem showed gradually increase. Grain ratio was stable increase at T6 treatments, but not at T5 treatment, 4. Dry matter contents of leaf and grain were stable increased at all treatment but stem was multifarious according to weather conditions. 5. Changes of palatability were high at T1, T2 and T3 treatments untill mid-October, but T4 treatment and rice straw showed high in early December. 6. According to the results obtained in this study, it was suggested that when sorghum x sudangrass hybrid is used as foggage, foggaging period would be suitable until mid-november and growth stage for foggaging would be recommendable from T2 to boot stage for maximum availability.
Thanh, T.D.,Nan, W.Z.,Nam, G.,Van, H.T.,You, T.S.,Phan, T.L.,Yu, S.C. Elsevier 2015 CURRENT APPLIED PHYSICS Vol.15 No.10
A systematic study of the conventional and inverse magnetocaloric effects, and critical behaviors in an alloy ingot of Ni<SUB>43</SUB>Mn<SUB>46</SUB>Sn<SUB>8</SUB>In<SUB>3</SUB> has been performed. Our results reveal the sample exhibiting structural and magnetic phase transitions at temperatures T<SUB>C</SUB><SUP>M</SUP> = 166 K (T<SUB>C</SUB> of the martensitic phase), T<SUB>M-A</SUB> = 260 K (the martensitic-to-austenitic phase transformation) and T<SUB>C</SUB><SUP>A</SUP> = 296 K (T<SUB>C</SUB> of the austenitic phase). The large values of refrigerant capacity (RC) around T<SUB>M-A</SUB> and T<SUB>C</SUB><SUP>A</SUP> are found to be RC<SUB>M-A</SUB> = 172.6 and RC<SUB>A</SUB> = 155.9 J kg<SUP>-1</SUP>, respectively, under an applied field change of 30 kOe. Our critical analyses near the T<SUB>C</SUB><SUP>M</SUP> and T<SUB>C</SUB><SUP>A</SUP> reveal that a coexistence of the long- and short-range ferromagnetic order in the martensitic phase, while the long-range ferromagnetic order exists in the austenitic phase. Interestingly, at around T<SUB>C</SUB><SUP>A</SUP>, the maximum magnetic entropy change (|ΔS<SUB>max</SUB>|) versus magnetic field H obeys a power law, |ΔS<SUB>max</SUB>| = a.H<SUP>n</SUP>, where the exponent n is found to be about 0.66.
Phan, T. L.,Nguyen, V. D.,Ho, T. A.,Khiem, N. V.,Thanh, T. D.,Phuc, N. X.,Thang, P. D.,Yu, S. C. IEEE 2014 IEEE transactions on magnetics Vol.50 No.6
<P>The magnetic properties of polycrystalline ceramic samples (Nd1-xYx)(0.7)Sr0.3MnO3 with x = 0.21 - 0.35 were studied by means of dc magnetization and ac susceptibility measurements. Experimental results reveal a strong decrease of the ferromagnetic (FM)-paramagnetic phase-transition temperature (T-C) from 97 to 65 K as increasing x from 0.21 to 0.35, respectively. There is magnetic inhomogeneity associated with short-range FM order. Particularly, the samples undergo a spin-glass (SG) phase transition at the so-called blocking temperature (T-B) below T-C, which shifts toward lower temperatures with increasing the applied field, Hex; T-B -> T-g (the SG phase-transition temperature) as H-ex -> 0. The existence of the SG behavior in these samples was also confirmed by frequency (f) dependences of the ac susceptibility. For the in-phase/real component, chi' (T), it shows a frequency-dependent peak at the SG freezing temperature (T-f); T-f -> T-g as f -> 0. Dynamics of this process were analyzed by means of the slowing down scaling law, tau/tau(0) proportional to (T-f/T-g - 1)(-zv), where tau(0) and zv are the characteristic time and critical exponent, respectively. Fitting the experimental T-f(f) data to the scaling law gave the results of zv = 10.1-12.3 and tau(0) = 10(-21)-10(-15)s. These values are different from those expected for canonical SG systems with zv = 10 and tau(0) = 10(-13)s, revealing the cluster-SG behavior of (Nd1-xYx)(0.7)Sr0.3MnO3 samples. Notably, the increase in Y content leads to the shift of tau(0) and zv values toward those of canonical SG systems, which is ascribed to an expansion of SG clusters.</P>
Ahmed, S.T.,Hwang, J.A.,Hoon, J.,Mun, H.S.,Yang, C.J. Asian Australasian Association of Animal Productio 2014 Animal Bioscience Vol.27 No.1
The banning of the use of antibiotics as feed additive has accelerated investigations of alternative feed additives in animal production. This experiment investigated the effect of pure citric acid or acidifier blend supplementation as substitute for antibiotic growth promoters on growth performance, fecal microbial count, and humoral immunity in weaned piglets challenged with Salmonella enterica serover Typhimurium and Escherichia coli KCTC 2571. A total of 60 newly weaned piglets (crossbred, 28-d-old; average 8 kg initial weight) were randomly assigned to four dietary treatments in a completely randomized design. Dietary treatments included NC (negative control; basal diet), PC (positive control; basal diet+0.002% apramycin), T1 (basal diet+0.5% pure citric acid), and T2 (basal diet+0.4% acidifier blend). All piglets were orally challenged with 5 mL of culture fluid containing $2.3{\times}10^8$ cfu/mL of E. coli KCTC 2571 and $5.9{\times}10^8$ cfu/mL of S. typhimurium at the beginning of the experiment. The PC group showed the highest ADG and ADFI, whereas gain:feed was improved in the PC and T1 group (p<0.05). All dietary treatments showed significant reduction in fecal counts of Salmonella and E. coli, compared to NC (p<0.05), with PC being better than T1 and T2. Significant elevation in fecal Lactobacillus spp. counts was shown by treatments with T1, T2, and PC, whereas Bacillus spp. counts were increased by treatment with T1 and T2 compared to NC and PC diet (p<0.05). Serum IgG concentration was increased by T1 diet (p<0.05), whereas IgM and IgA were not significantly affected by any of the dietary treatments (p>0.05). From these above results, it can be concluded that, as alternatives to antibiotics dietary acidification with pure citric acid or acidifiers blend did not fully ameliorate the negative effects of microbial challenges in respect of growth performance and microbial environment, however improved immunity suggested further research with different dose levels.