본 연구는 한국교육개발원에서 제공하는 「한국교육종단연구」의 자료를 활용하여 교사들의 소명감이 교사의 직업만족도에 주는 영향이 어떠한지 위계적 선형 모형(HLM)을 통해 분석해 보았다. 본 연구의 주요 연구결과는 다음과 같다. 첫째, 모든 학년에서 교사의 교직경력, 교장의 지도성 유형, 동료교사와의 대화와 갈등이 교사의 직업만족도에 유의미한 영향을 미치는 것으로 나타났다. 둘째, 교사의 소명감은 인화중심 교장지도성 다음으로 교사의 직업만족도에 유의미한 영향력을 가진 변인으로 나타났다. 다시 말해, 소명감을 가진 교사들이 그렇지 않은 교사들보다 자신들의 직업에 더욱 만족하고 있었다. 이러한 연구결과는 교사의 소명감이 교사의 만족도에 미치는 영향력을 밝혔다는 점에서 의미를 가진다. 그리고 예비교사 선별과정과 교사 양성과정에서 교사의 역할과 직무에 대한 의미와 목적으로서의 소명감이 더욱 강조되고 강화할 수 있는 접근이 필요하다는 것을 시사한다.

The proteins from functional rice cultivars (Nogwonchalbyeo, Giant embryonic, Arhyangchalbyeo, and Goamibyeo) and general white rice were extracted and separated using two-dimensional (2D) gel electrophoresis. A wide variation in the molecular weight (MW) and pH range of the expressed proteins in rice samples were observed. The green-kerneled rice (Nogwonchalbyeo) exhibited proteins with MW of 9-57 kDa and appeared at a pH range of 4-7. The Giant embryonic contained proteins with MW of 31-63 kDa and a pH range of 5-6. The aromatic glutinous rice (Arhyangchalbyeo) showed proteins with MW of 24-28 and pH of 5.8-6.8. The high-amylose rice (Goamibyeo) exhibited proteins with MW of 3-63 and pH of 5.2-5.6. The identified proteins uniquely found and highly expressed in each cultivar may have a significant role on rice functionality. The results illustrate that the 2D gel electrophoresis is a valuable method in the determination of the protein expression profiles in functional rice grains and may be useful in the identification of specific marker proteins associated with the functional property of rice.

Transforming growth factor (TGF) family is well known to induce the chondrogenic differentiation of mesenchymal stem cells (MSC). However, the precise signal transduction pathways and underlying factors are not well known. Thus the present study aims to evaluate the possible role of C2 domain in the chondrogenic differentiation of human mesenchymal stem cells. To this end, 145 C2 domains in the adenovirus were individually transfected to hMSC, and morphological changes were examined. Among 145 C2 domains, C2 domain of protein kinase C eta (PKCη) was selected as a possible chondrogenic differentiation factor for hMSC. To confirm this possibility, we treated TGFβ3, a well known chondrogenic differentiation factor of hMSC, and examined the increased-expression of glycosaminoglycan (GAG), collagen type II (COL II) as well as PKCη using PT-PCR, immunocytochemistry and Western blot analysis. To further evaluation of C2 domain of PKCη, we examined morphological changes, expressions of GAG and COL II after transfection of PKCη -C2 domain in hMSC. Overexpression of PKCη-C2 domain induced morphological change and increased GAG and COL II expressions. The present results demonstrate that PKCη involves in the TGF-β3-induced chondrogenic differentiation of hMSC, and C2 domain of PKCη has important role in this process.

The term euphemism is not polysemous. However it is frequently employed in a 2-way form; sometimes as a channel to convey Speaker's innocuous indirect message (euphemism) and in other times as a device to hide Speaker's malicious intention (doublespeak). The former is intended to promote politeness from Speaker to Hearer and the other is a manipulated form to secure Speaker‘s unduly profit at the cost of Hearer. This paper discusses what distinguishes benign euphemism from malicious doublespeak. This writer probes into the similarities and dissimilarities between euphemism and doublespeak by comparing Allen & Burridge (1991) and Lutz (1989) and proposes Leech's (1987) cost-benefit module as a possible criterion for telling benign euphemism from malicious doublespeak. Overall this research tries to shed light on how language can be manipulated to Speaker's purposes.

This study was performed to evaluate the effects of fibroblast co-culture on in vitro maturation (IVM) of prepubertal mouse preantral follicles. The intact preantral follicles were obtained from the ovaries of 12－14 day old mice and these were cultured individually in α-minimal essential medium (α-MEM) supplemented with 5% fetal bovine serum (FBS), 100 mIU/㎖ recombinant follicle stimulating hormone (rFSH), 1% insulin-transferrin-selenium, 100 μg/ml penicillin and 50 ㎍/㎖ streptomycin as base medium for 12 days. A total of 200 follicles were cultured in base medium co-cultured with mouse embryonic fibroblast (MEF) (MEF group) (n=100) or only base medium as control group (n=100). Survival rate of follicles on day 12 of culture were significantly higher in the MEF group of 90.0%, compared with 77.0% of the control group (p=0.021). Follicle diameters on day 6 and 8 of the culture period were significantly larger in the MEF group than those in the control group (p=0.021, p=0.007, respectively). Estradiol levels in culture media on day 4, 6, 8, 10 and 12 of the culture period were significantly higher in the MEF group (p=0.043, p=0.021, p=0.006, p<0.001 and p=0.008, retrospectively). Our data suggest that MEF cell co-culture on IVM of mouse preantral follicle increases survival rate and promotes follicular growth and steroid production.

This study was performed to investigate the effect of peroxisome proliferators activated receptor-r (PPAR-r) ligand, pioglitazone, on production of regulated upon activation normal T-cell expressed and secreted (RANTES) and in vitro fertilization (IVF) outcome in infertile patients with endometriosis. Sixty-four infertile patients with stage III or IV endometriosis undergoing IVF were randomly allocated to the study or the control group. The long protocol of GnRH agonist (GnRH-a) was used for controlled ovarian stimulation (COS) in all patients. Patients in the study group were treated with pioglitazone at a dose of 15 ㎎/day orally from the starting day of GnRH-a treatment to the day of hCG injection. Blood samples were drawn for serologic assay of RANTES on the first day of GnRH-a treatment and the day of hCG injection. There were no differences between the study and control groups in patient characteristics. There were also no differences between the two groups in COS duration, and the numbers of retrieved oocytes, fertilized oocytes and embryos transferred. The clinical pregnancy rate per cycle was higher in the study group, but this difference was not statistically significant. However, embryo implantation rate was significantly higher in the study group of 12.5% compared with 8.6% in the control group (P<0.05). The serum RANTES levels after pioglitazone treatment were significantly lower than those before pioglitazone treatmen in the study group (P<0.05). Our data suggest that pioglitazone treatment can suppress RANTES production and improve the embryo implantation rate in patients with endometriosis undergoing IVF.

Most of high energy cosmic rays (CRs) are thought to be produced by diffusive shock acceleration (DSA) at supernova remnants (SNRs) within the Galaxy. Fortunately, nonthermal emissions from CR protons and electrons can provide direct observational evidence for such a model and place strong constraints on the complex nonlinear plasma processes in DSA theory. In this study we calculate the energy spectra of CR protons and electrons in Type Ia SNRs, using time-dependent DSA simulations that incorporate phenomenological models for some wave-particle interactions. We demonstrate that the timedependent evolution of the self-amplified magnetic fields, Alfvénic drift, and escape of the highest energy particles affect the energy spectra of accelerated protons and electrons, and so resulting nonthermal radiation spectrum. Especially, the spectral cutoffs in X-ray and γ-ray emission spectra are regulated by the evolution of the highest energy particles, which are injected at the early phase of SNRs. Thus detailed understandings of nonlinear wave-particle interactions and time-dependent DSA simulations of SNRs are crucial in testing the SNR hypothesis for the origin of Galactic cosmic rays.

Capsinoids which were found recently in non-pungent pepper show the same biological effects as capsaicinoid including anticancer and anti-obesity. A precursor of capsaicinoids, vanillyl alcohol, is known to be produced by mutations in the p-aminotransferase (pAMT) gene. In the previous study, we showed that capsinoid production is also controlled by the capsaicin synthase (CS) gene. However correlation between the CS gene expression and capsinoids contents has not been fully understood. This study was conducted to elucidate correlation between the expression level of CS gene and capsinoids contents. Through germplasm screening, we identified one C. chinese pepper cultivar, SNU11-001, which contained capsinoids as much as C. annuum ‘CH-19 Sweet’. SNU11-001 was crossed with five Capsicum cultivars (ECW, Takanotsume, Yuwolcho, Habanero and Jolokia) containing different levels of capsaicin, ‘ECW’ is non-pungent pepper line, and ‘Takanotsume’ and ‘Yuwolcho’ have mild pungency, and ‘Habanero’ and ‘Jolokia’ is known to be included in the most pungent pepper lines. When we analyzed the expression of CS and pAMT genes using the six Capsicum cultivars, the expression levels of CS were higher in pungent Capsicum cultivars. To test whether the expression levels of CS also control capsinoids contents, we will analyze several F2 populations derived from crosses between SNU11-001 and Capsicum cultivars containing different levels of capsaicin.

Capsicum diversity is getting lower in modern crops because of the genetic erosion. In Capsicum, breeders have been mainly focused on agriculturally important traits such as disease resistances, high yield and pungency. However, this narrow breeding pool hampered to develop improved cultivars. It has become a hot issue to conservation of genetic diversity and exploitation of wild germplasm in Capsicum. Analysis of genetic diversity and construction of core collection is the first step to make efficient use of germplasm. Although there have been several attempts to construct core collections in Capsicum, most of these works were limited due to handling small number of samples, relying mainly on the characterization of morphological traits or focusing only C. annuum species. To expand understanding of the structure and genetic diversity of germplasm in Capsicum, we need to have a highly efficient genotyping tool to handle large number of samples. Toward this end, we are analyzing 3,599 germplasm accessions including other cultivated species and wild species in Capsicum with 48 single nucleotide polymorphism (SNP) markers.

The precise, fast, and cost-effective identification of important fruit crop cultivars is essential for practical breeding and plant breeder’s rights. Traditional methods for identification of persimmon cultivars are based on the evaluation of sets of morphological characteristics. However, the identification using only morphological traits is difficult to distinguish among genetically closely related cultivars. This study was conducted to develop more reliable DNA markers for identification of the 32 persimmon cultivars in Korea and Japan. In total, 309 random amplified polymorphic DNA (RAPD) markers were identified using 40 different random primers. The 4 (OPP-08) to 14 (UBD159) polymorphic bands were detected with an average of 7.7. The resulting 57 RAPD fragments were selected, and their sequences were determined for developing sequence-characterized amplified region (SCAR) markers. As a result, 15 of 57 RAPD fragments were successfully converted to SCAR markers. A single polymorphic band of the same size as the RAPD fragments or smaller DNA fragments were amplified depending on primer combinations in the 15 SCAR markers. Among these markers, a combination of eight SCAR markers (PS225_200, PSN05_420, PSF13_523, PSN11_540, PS372_567, PS485_569, PSP08_635, and PS631_735) provided sufficient polymorphisms to identify 32 persimmon cultivars depending on number and size of amplicons. These newly developed markers will be useful as a fast and reliable tool to identify persimmon cultivars.

Mutant lines induced by ethyl methane sulfonate (EMS) have been used for crop improvement and functional genomics. Since pepper is very recalcitrant to be transformed, EMS mutagenesis could be an alternative method to generate useful mutant lines and to characterize the function of genes. We have developed mutant lines consisting of about 3,938 M2 mutant lines using Korea local landrace, C. annuum ‘Yuwolcho’. Yuwolcho has suitable traits for mutagenesis such as early flowering and maturation, large number of seeds per fruit, and susceptibility to various diseases. Up to now, 917 M2 mutant lines were evaluated to confirm the effect of EMS. M2 mutant lines have shown variations in plant stature (small size, dwarfism, and early death), leaf development (light color, variegation and morphological change) and flower (inflorescence, morphological change) and fruit (size and color). We observed the largest morphological variation in leaf development. Most of these mutant phenotypes were inherited recessively. In addition, we are applying cel1-based TILLING to identify useful mutant lines. We will apply cel1-based TILLING to identify useful mutant lines. We are expecting that these mutant lines will be very useful to study the function of genes in C. annuum.

This study was performed to investigate the expression of cathepsin B mRNA and protein in eutopic and ectopic endometrial tissues of patients with endometriosis and in normal endometrial tissues and to clarify the association between the cathepsin B expression and endometriosis. A total of 40 women with histologically confirmed endometriosis were recruited for study group. For controls, 20 women undergoing operative treatment for uterine myoma, cervical intraepithelial neoplasia (CIN) or benign gynecologic conditions other than endometriosis were recruited. Eutopic endometrial tissues of both groups and ectopic endometrial tissue of study group were collected during the operations. We employed real time reverse transcriptase - polymerase chain reaction (RT-PCR) to quantify mRNA levels of cathepsin B in these tissues. Then, we performed western blot analysis to measure the protein levels of cathepsin B. The expressions of cathepsin B mRNA and protein were significantly higher in both eutopic and ectopic endometrial tissues of women with endometriosis than in endometrial tissues of controls. These data suggest that the higher expression of cathepsin B in the endometrial tissues might be associated with the development of endometriosis. In addition, eutopic endometrium itself with higher expression cathepsin B may play a pivotal role in the histogenesis of endometriosis.

In this study, β -carotene concentrations was determined in soybean cultivar according to seed size, usage, seed coat color and cotyledon color as well as the process of seed germination. The total average concentration of β -carotene was 6.6~mug/g in soybean seed, 33.3~mug/g in soybean sprout. According to seed size, the total β -carotene concentration of soybean was 6.9~mug/g in large soybean seed, 6.7~mug/g in medium soybean seed, and 6.31~mug/g in small soybean seed. In soybean sprout, the total β -carotene concentration was 21.4~mug/g in large soybean sprout, 30.5~mug/g in medium soybean sprout, and 43.5~mug/g in small soybean sprout. According to the utilization of seed, the total β -carotene concentration of soybean seed was 7.2~mug/g in cooked with rice soybean seed, 6.1~mug/g in paste and curd soybean seed, and 6.3~mug/g in sprout soybean seed. In soybean sprout, the total β -carotene concentration was 25.9~mug/g in cooked with rice soybean sprout, 32.4~mug/g in paste and curd soybean sprout, and 41.9~mug/g in sprout soybean sprout. When comparison with seed coat color, the total β -carotene concentration of soybean with brown seed coat (8.8~mug/g ) was slightly higher than those of soybean with yellow (6.1~mug/g ). In soybean sprout, the total β -carotene concentration was 21.8~mug/g in black seed coat sprout, 38.7~mug/g in brown seed coat sprout, 34.1~mug/g in green seed coat sprout, 39.5~mug/g in yellow seed coat sprout, and 30.5~mug/g in mottle seed coat sprout. The results of this study suggested the functional characteristics of soybean through quantitative analysis of β -carotene.