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        검색결과 923

        201.
        2019.03 KCI 등재 구독 인증기관 무료, 개인회원 유료
        아보카도는 에콰도르에서 경제적으로 중요한 과수이다. 건강한 종묘 생산은 아보카도 식물의 생산에서 중요한 단계이며 유익한 미생물의 처리는 식물체의 영양을 향상 시키는데 사용 될 수 있다. 아보카도 묘목에 처리한 미생물의 효과를 검정한 결과, 묘목의 뿌리부분과 지상부의 양분 흡수를 증가시켰다. T. harzianum은 뿌리에서 N과 Mg의 흡수를 유의적으로 증가시켰으며, 지상부에서는 N, Ca, Mg, Mn 및 Cu의 흡수를 증가시켰다. 반면에, G. iranicum var tenuihypharum은 뿌리에서 Ca와 Fe의 흡수를 유의적으로 증가시켰으며, 지상부에서는 N흡수를 증가시켰다. 또한, mycorrhiza의 접종으로 아보카도 묘목의 뿌리 부분과 지상부에서 P 양을 증가시키는 경향이 긍정적으로 나타났다. 두 미생물 모두 S의 흡수에 영향을 미치지 않았는데, 이는 식물 전체에서 균일한 비율을 나타냈다. 또한 인산질 비료(일인산 칼륨)의 시용은 미량 영양소의 흡수에 긍정적인 영향을 미쳤다.
        4,000원
        202.
        2019.03 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Photosynthetic characteristics and growth responses of Phalaenopsis Queen Beer ‘Mantefon’ orchid were determined in plants exposed to variable carbon dioxide (CO2) concentrations at 2-, 24-, and 36-weeks age (i.e., corresponding to juvenile, young, and mature vegetative growth stages, respectively). Plants were grown at 400 (control), 800, or 1,600 μmol・mol-1 CO2 for 6 hours during the nighttime for 32 weeks. Phalaenopsis ‘Mantefon’ in 2- and 24-week-old plants grown at 1,600 μmol・mol-1 CO2 had increased leaf number and net CO2 uptake compared with the plants grown at 400 μmol・mol-1 CO2. In 36-week-old of Phalaenopsis ‘Mantefon’, leaf number was significantly greater in plant grown at 800 and 1,600 μmol・mol-1 conditions compared with plants grown at 400 μmol・mol-1 CO2. Leaves that emerged after the start of the CO2 treatment were initially longer in the plants grown at 1,600 μmol・mol-1 CO2 than at 400 μmol·mol-1 C O2, but the final leaf length was shortest in the plants grown at 1,600 μmol・mol-1 CO2 condition. Plants showed crassulancean acid metabolism characteristic of nighttime CO2 uptake regardless plant growth stages. We found that growers may be able to promote leaf growth with increasing leaf number and reducing time to leaf initiation in the 36-week-old (i.e., mature stage) plants with 800 – 1,600 μmol·mol-1 CO2 and 2- and 24-week-old (i.e., juvenile and young stages) plants with 1,600 μmol·mol-1 C O2 for Phalaenopsis ‘Mantefon’.
        4,000원
        203.
        2019.03 KCI 등재 구독 인증기관 무료, 개인회원 유료
        본 연구를 통해 잔디주머니나방속이 국내에서 처음 발견되어 보고한다. 잔디주머니나방속내 잔디주머니나방에 대한 성충, 유충, 번데기 등 형태학적 특징을 재기재하였다. 또한 신속한 종 동정을 위한 DNA바코드 정보를 제공하였다.
        4,000원
        206.
        2018.12 KCI 등재 구독 인증기관 무료, 개인회원 유료
        To date, there are no protocols optimized to the effective separation of spermatogonial stem cells (SSCs) from testicular cells derived from mouse testes, thus hindering studies based on mouse SSCs. In this study, we aimed to determine the most efficient purification method for the isolation of SSCs from mouse testes among previously described techniques. Isolation of SSCs from testicular cells derived from mouse testes was conducted using four different techniques: differential plating (DP), magnetic-activated cell sorting (MACS) post-DP, MACS, and positive and negative selection double MACS. DP was performed for 1, 2, 4, 8, or 16 h, and MACS was performed using EpCAM (MACSEpCAM), Thy1 (MACSThy1), or GFR α1 (MACSGFRα1) antibodies. The purification efficiency of each method was analyzed by measuring the percentage of cells that stained positively for alkaline phosphatase. DP for 8 h, MACSThy1 post-DP for 8 h, MACSGFRα1, positive selection double MACSGFRα1/EpCAM, and negative selection double MACSGFRα1/α-SMA were identified as the optimal protocols for isolation of SSCs from mouse testicular cells. Comparison of the purification efficiencies of the optimized isolation protocols showed that, numerically, the highest purification efficiency was obtained using MACSGFRα1. Overall, our results indicate that MACSGFRα1 is an appropriate purification technique for the isolation of SSCs from mouse testicular cells.
        4,000원
        207.
        2018.12 구독 인증기관 무료, 개인회원 유료
        Phagocytosis is a fundamental process in which phagocytes capture and ingest foreign particles including pathogenic bacteria. Several oral pathogens have anti-phagocytic strategies, which allow them to escape from and survive in phagocytes. Impaired bacteria phagocytosis increases inflammation and contributes to inflammatory diseases. The purpose of this study is to investigate the influences of various agents on oral pathogenic phagocytosis. To determine phagocytosis, Streptococcus mutans, Fusobacterium nucleatum, Aggregatibacter actinomycetemcomitans and Porphyromonas gingivalis were stained with 5-(and-6)-carboxyfluorescein diacetate succinimidyl ester (CFSE), and was measured using flowcytometery and confocal microscopy. The influencing factors on phagocytosis were evaluated through the pretreatment of ROS inhibitor (N-acetyl-L-cysteine (NAC)), lysozyme, potassium chloride (KCI) and adenosine triphosphate (ATP) in THP-1 cells. Expression of pro-inflammatory cytokines was determined by enzyme-linked immunosorbent assay (ELISA). The phagocytosis of various bacteria increased in a MOI-dependent manner. Among the tested bacteria, phagocytosis of P. gingivalis showed the highest fluorescent intensity at same infection time. Among the tested inhibitors, the NAC treatment significantly inhibited phagocytosis in all tested bacteria. In addition, NAC treatment indicated a similar pattern under the confocal microscopy. Moreover, NAC treatment significantly increased the bacteriainduced secretion of IL-1β among the tested inhibitors. Taken together, we conclude that the phagocytosis occurs differently depending on each bacterium. Down-regulation by ROS production inhibited phagocytosis and lead increased of oral pathogens-associated inflammation.
        4,000원
        208.
        2018.12 KCI 등재후보 구독 인증기관 무료, 개인회원 유료
        This study aimed to analyze a high-performance liquid chromatography (HPLC) separation using a pentafluorophenyl column of parent drug hydroxychloroquine (HCQ) and its active metabolite, desethylhydroxchloroquine (DHCQ) applying to determine bioequivalence of two different formulations administered to patients. A rapid, simple, sensitive and specific liquid chromatography-tandem mass spectrometry (LC-MS/MS) method has been developed and validated for bioanalysis of HCQ and its metabolite DHCQ in human whole blood using deuterium derivative hydroxychloroquine-D4 as an internal standard (IS). A triple-quadrupole mass spectrometer was operated using electrospray ionization in multiple reaction monitoring (MRM) mode. Sample preparation involves a two-step precipitation of protein techniques. The removed protein blood samples were chromatographed on a pentafluorophenyl (PFP) column (50 mm × 4.6 mm, 2.6 μm) with a mobile phase (ammonium formate solution containing dilute formic acid) in an isocratic mode at a flow rate of 0.45 mL/min. The standard curves were found to be linear in the range of 2 – 500 ng/mL for HCQ; 2 – 2,000 ng/mL for DHCQ in spite of lacking a highly sensitive MS spectrometry system. Results of intra- and inter-day precision and accuracy were within acceptable limits. A run time of 2.2 min for HCQ and 2.03 min for DHCQ in blood sample facilitated the analysis of more than 300 human whole blood samples per day. Taken together, we concluded that the assay developed herein represents a highly qualified technology for the quantification of HCQ in human whole blood for a parallel design bioequivalence study in a healthy male.
        4,000원
        217.
        2018.11 구독 인증기관·개인회원 무료
        The embryonic genome activation (EGA) is genetically activated states that embryos make the materials such as growth factors for using themselves. EGA is various because they have many materials, different site, different stage, also different species. At this time, transcription factors are expressed. Transcription factors bind to specific DNA region, and regulate the gene expression. Thus, we check the expression of transcription factors, we can know that embryo development is very well or not. The development stages of embryos are basically the stages from fertilization to blastocyst. So, we check the embryos oocyte to blastocyst. In our experiments, we focus the early developmental transcription factors such as Cdx2, Oct4, Sox2, Nanog and E-Cadherin. Above antibody factors showed different expression sites, and there were many differentiated parts from other animal species. In addition, we compared the SCNT and parthenogenetic activation (PA) because these are same methods using electrical activation among the embryo production methods. Our results showed not only similar patterns but also different patterns between pig and mouse. Therefore, we have to investigate that different patterns of transcription factors play a role in pigs, and why occur.
        218.
        2018.10 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The purpose of this study is to promote the elderly apparel industry for the increasing numbers of elderly obese male population. In the study, a total number of 249 males between the ages of 60 to 85 were studied to analyze their body types and differences. The group had a Rohrer Index of 1.6 or higher and BMI of 25 or higher. The noticeable physical differences in the group were shorter waist front length, bigger waist and hip circumferences with increasing age and slimmer limbs that are associated with the natural aging process with or without obesity. The obese body types have been classified in the following 3 different categories. Type 1 is the group that has lower body obesity with broad shoulders and relatively slimmer abdomen than a heavy bottom. A total number of 84 people belonged to the type 1 obesity category which makes up 33.8% of the total. Type 2 is the group that has upper body obesity with especially large abdominal obesity. A total number of 76 people, 30.5% of the total, were classified as type 2. Type 3 is the group that has whole body obesity with balanced obesity in the whole body. A total number of 89 people, 35.7% of the total, made up type 3.
        4,600원