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91.
Hyekwon Kim Jeong-Ki Kim Hohyun Song Jungah Choi Byoungshik Shim Bokyu Kang Hyoungjoon Moon Minjoo Yeom Sang-Hyun Kim Daesub Song Manki Song 《Journal of microbiology (Seoul, Korea)》2014,52(9):794-800
Sublingual (SL) administration of influenza vaccine would be non-invasive and effective way to give human populations protective immunity against the virus, especially when pandemic influenza outbreaks. In this study, the efficacy of pandemic influenza virus-based subunit vaccines was tested after sublingual (SL) adjuvant administration in pigs. Eight specific pathogen-free Yucatan pigs were divided into 4 groups: nonvaccinated but challenged (A) and vaccinated and challenged (B, C, and D). The vaccinated groups were subdivided by vaccine type and inoculation route: SL subunit vaccine (hemagglutinin antigen 1 [HA1] + wild-type cholera toxin [wtCT], B); IM subunit vaccine (HA1 + aluminum hydroxide, C); and IM inactivated vaccine (+ aluminum hydroxide, D). The vaccines were administered twice at a 2-week interval. All pigs were challenged with pandemic influenza virus (A/swine/GCVP-KS01/2009 [H1N1]) and monitored for clinical signs, serology, viral shedding, and histopathology. After vaccination, hemagglutination inhibition titre was higher in group D (320) than in the other vaccinated groups (40–80) at the time of challenge. The mobility and feed intake were reduced in group C. Both viral shedding and histopathological lesions were reduced in groups B and D. Although this study has limitation due to the limited number of pigs (2 pigs per a group), the preliminary data in this study provided the protective potential of SL administration of bacteria-expressed pandemic H1N1 influenza vaccine in pigs. There should be additional animal studies about effective adjuvant system and vaccine types for the use of SL influenza vaccination. 相似文献
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Despite increasing awareness of the importance of WRKY genes in plant defense signaling, the locations of these genes in the Capsicum genome have not been established. To develop WRKY-based markers, primer sequences were deduced from the conserved sequences of the DNA binding motif within the WRKY domains of tomato and pepper genes. These primers were derived from upstream and downstream parts of the conserved sequences of the three WRKY groups. Six primer combinations of each WRKY group were tested for polymorphisms between the mapping parents, C. annuum 'CM334' and C. annuum 'Chilsungcho'. DNA fragments amplified by primer pairs deduced from WRKY Group II genes revealed high levels of polymorphism. Using 32 primer pairs to amplify upstream and downstream parts of the WRKY domain of WRKY group II genes, 60 polymorphic bands were detected. Polymorphisms were not detected with primer pairs from downstream parts of WRKY group II genes. Half of these primers were subjected to F2 genotyping to construct a linkage map. Thirty of 41 markers were located evenly spaced on 20 of the 28 linkage groups, without clustering. This linkage map also consisted of 199 AFLP and 26 SSR markers. This WRKY-based marker system is a rapid and simple method for generating sequence-specific markers for plant gene families. 相似文献
94.
J. Rajesh Banu Khac-Uan Do Ick-Tae Yeom 《World journal of microbiology & biotechnology》2008,24(12):2981-2986
In the present study a laboratory scale anoxic/oxic reactor was used to remove the important eutrophication nutrients such
as phosphorus and nitrogen from synthetic domestic wastewater. Phosphorus was removed through simultaneous precipitation and
was carried out using the coagulant ferrous sulphate FeSO4 · 7H2O. Total phosphorus in the effluent was controlled to below 1 mg/l using a ferrous to phosphorus molar ratio of 2.1. pH after
the addition of coagulant plays a major role in determining the molar ratio of the precipitant. Nitrogen was removed biologically
in the anoxic/oxic system and the effect of simultaneous precipitation on nitrification and denitrification was investigated.
The nitrification rate of the system remained unaffected during simultaneous precipitation and varied from 0.046 to 0.059 g N–NH4
+/g VSS/day. Denitrification was complete and was not affected by the coagulation process. The nitrogen removal efficiency
varied from 78% to 85%. COD removal efficiency was not affected during simultaneous precipitation and was varied from 94%
to 98%. The highly efficient nitrogen removal in the presence of simultaneous precipitant ferrous sulphate makes the process
an ideal option for nutrient removal. 相似文献
95.
Seung Hoon Song Sung Ho Yeom Suk Soon Choi Young Je Yoo 《Biotechnology and Bioprocess Engineering》2002,7(6):352-356
Aeration was found to affect the biological denitrification byOchrobactrum anthropi SY509. Although cell growth was vigorous under 1 vvm of aeration and an agitation speed of 400 rpm in a 3-L jar fermentor,
almost no nitrate was removed. Yet under low agitation speeds (100, 200, and 300 rpm), denitrification occurred when the dissolved
oxygen was exhausted shortly after the inoculation of the microorganism.Ochrobactrum anthropi SY509 was found to express highly active denitrifying enzymes under anaerobic conditions. The microorganism also synthesized
denitrifying enzymes under aerobic conditions (1 vvm and 400 rpm), yet their activity was only 60% of the maximum level under
anaerobic conditions and the nitrate removal efficiency was merely 15%. However, although the activities of the denitrifying
enzymes were inhibited in the presence of oxygen, they were fully recovered when the conditions were switched to anaerobic
conditions. 相似文献
96.
Sungim Choi Heun Choi Seong Yeon Park Yee Gyung Kwak Je Eun Song So Youn Shin Ji Hyeon Baek Hyun-IL Shin Hong Sang Oh Yong Chan Kim Joon-Sup Yeom Jin-Hee Han Min Jae Kim 《The Korean journal of parasitology》2022,60(1):39
Plasmodium vivax exhibits dormant liver-stage parasites, called hypnozoites, which can cause relapse of malaria. The only drug currently used for eliminating hypnozoites is primaquine. The antimalarial properties of primaquine are dependent on the production of oxidized metabolites by the cytochrome P450 isoenzyme 2D6 (CYP2D6). Reduced primaquine metabolism may be related to P. vivax relapses. We describe a case of 4 episodes of recurrence of vivax malaria in a patient with decreased CYP2D6 function. The patient was 52-year-old male with body weight of 52 kg. He received total gastrectomy and splenectomy 7 months before the first episode and was under chemotherapy for the gastric cancer. The first episode occurred in March 2019 and each episode had intervals of 34, 41, and 97 days, respectively. At the first and second episodes, primaquine was administered as 15 mg for 14 days. The primaquine dose was increased with 30 mg for 14 days at the third and fourth episodes. Seven gene sequences of P. vivax were analyzed and revealed totally identical for all the 4 samples. The CYP2D6 genotype was analyzed and intermediate metabolizer phenotype with decreased function was identified. 相似文献
97.
Summary Molecular weight of PHB becomes low when using a hypochlorite extraction method for PHB separation. This disadvantage was overcome by adding sodium bisulfite which is an anti-oxidant. The molecular weight drop was decreased from 30 % to 14 % by adding sodium bisulfite. It was also found that raising the pH to 12 and the addition of a surfactant resulted in the improvement of the PHB purity. 相似文献
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Small interfering RNA (siRNA) targetted to Smad3 inhibits transforming growth factor-β signaling 总被引:3,自引:0,他引:3
RNA interference has become a powerful tool for silencing of gene expression in mammals and plants. To determine the effect of Smad3 on transforming growth factor-beta signaling, we constructed a small interfering RNA (siRNA) targeted to Smad3. This siRNA inhibited expression of the endogenous Smad3 leading to the prevention of nuclear localization of Smad3. Further, Smad3 siRNA prevented not only anti-proliferative activity of TGF-beta1 but also TGF-beta1-inducible promoter activity. 相似文献
100.
Waste cooking oil (WCO) has attracted attention as a non-edible feedstock for biodiesel. Although an alkali catalyst has several advantages over an acid catalyst in biodiesel production, biodiesel conversion from WCO is only 5.2% when using an alkali catalyst (NaOH), owing to its high free fatty acid (FFA) content of 4.2%. In this study, a novel two-step process in a single reactor, comprised of re-esterification of the FFAs with crude glycerol, using a Tin (II) chloride (SnCl2) catalyst, and subsequent transesterification with methanol, using an alkali catalyst, was adopted, and each step was optimized. This study revealed that the FFA content after re-esterification should be approximately 1.5%, not only to save glycerol and the catalyst involved in the re-esterification, but also to achieve high biodiesel conversion during the transesterification. An alkaline catalyst was successfully used to produce biodiesel in the second step, and a 92.8% conversion to biodiesel was achieved under the optimized conditions (0.6% catalyst relative to WCO, 0.2mL-methanol/WCO, 70ºC, 3 h). Overall, this novel two-step process achieved highly enhanced biodiesel conversion (4.0% to 92.8%) with significantly reduced reaction time (12 h to 4 h) and methanol requirements (15 mL/g-WCO to 0.2 mL/g-WCO). 相似文献