• 한국과학교육학회지
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• 제36권5호
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• pp.801-814
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• 2016

본 연구는 예비 생물 교사들이 경쟁과 적응의 생물학적 의미를 일상생활에서 쓰이는 의미와 동일하게 이해함으로써 자연선택과 진화를 인식하는데 어려움이 있는지 알아보고자 하였다. 이를 위해 예비 생물 교사 53명을 대상으로 지필검사를 하였고, 13명을 면담하였다. 지필 검사지는 세 종류로 경쟁과 적응의 일반적 의미를 묻는 검사지와 생물학적 의미를 묻는 검사지, 자연선택개념 검사지였다. 면담은 반구조화 면담으로 진행하였다. 자료 분석은 4단계로 진행하였다. 먼저, 예비 생물 교사가 생각하는 경쟁과 적응의 일반적 의미를 국어사전에 제시된 정의와 비교하였다. 두 번째로, 예비 생물 교사가 생각하는 경쟁과 적응의 생물학적 의미를 생물학적 정의와 비교하였다. 세 번째로, 예비 생물 교사가 생각하는 경쟁과 적응의 일반적 의미와 생물학적 의미를 비교하였다. 이를 바탕으로 생물학적 경쟁과 적응에 대한 예비 생물 교사의 대안개념 유형을 제시하였다. 마지막으로, 이 대안개념 유형이 자연선택과 진화를 설명할 때도 나타나는지 확인하였다. 연구 결과 예비 생물 교사들은 경쟁의 생물학적 의미를 일반적 의미와 혼용하여, 경쟁은 의도 또는 목적을 위해 싸우거나 다투는 것으로 인식하고 있었다. 적응은 개체 수준에서 생물이 살아남기 위해 환경에 맞춘다는 목적론적으로 인식하고 있었다. 즉 적응을 일반적 의미와 혼동하였고, 적응을 진화와 연결지어 설명할 때도 적응을 일반적 의미로 이해하여 적응이 계속되면 진화가 이루어진다고 생각하고 있었다. 이 연구는 그동안 국내 연구자들의 관심을 받지 못했던 경쟁과 적응 개념에 대한 중요성을 부각시키고, 효율적인 진화 교수 학습의 밑바탕이 되는 경쟁과 적응의 선개념 유형을 분석하여 제시했다는 데 의의가 있다.

• 한국초등과학교육학회지:초등과학교육
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• 제23권2호
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• pp.101-109
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• 2004

The purpose of this research is to provide useful data in forming sound scientific concepts by investigating elementary students' non-scientific concepts related to their concepts of biological adaptation, and by analyzing the general inclinations and causes of some misconceptions. Twenty-four objective questions were designed to be given to 5th and 6th grade elementary students in order to investigate their concepts of biological adaptation. According to the test results, they formed scientific concepts in most questions. But they appeared to have many misconceptions in some parts which should be guided by the teacher's additional explanations rather than by the education curricula's focus. There are some cases where the 6th grade students had more misconceptions than the 5th grade students who were not systemically taught the concepts of biological adaptation, for the reasons of strengthening or maintaining the misconceptions by confusing the contents of learning. Male and female students have different scientific concepts of different questions according to their interest and attention. Therefore, it is necessary to develop various teaching-learning data which can help the teachers' additional explanations about the concepts of biological adaptation and invoke students' interest and attention, and to seek appropriate measures to form sound scientific concepts among teachers as well as students.

• KSBB Journal
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• 제29권2호
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• pp.81-86
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• 2014

Lactobacilli, the dominant species of microorganisms in the vaginal flora of healthy women, play important roles to prevent bacterial vaginosis and other sexually transmitted diseases. In this study, we carried out studies on stress adaptation prior to various stress treatment. We found that heat or salt adapted KLB46 showed higher cell viability than non adapted upon heat stress at $60^{\circ}C$ for 20 min. When chloramphenicol was added during the adaptation process, heat tolerance was abolished. This result suggested that de novo protein synthesis was essential during adaptation.

• 한국과학교육학회지
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• 제42권6호
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• pp.567-578
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• 2022

본 연구에서는 초등과학 교육과정 지도서의 생물의 적응 관련 서술, 교사의 진화 개념 및 신념이 초등교사의 생물의 적응 관련 교수실행에 영향을 미치는지 살펴보았다. 먼저 2009 초등과학 교육과정 교사용 지도서 중 생물의 적응 관련 단원에 서술된 문장 중 대안개념을 살펴보고 이러한 서술이 교사의 교수실행에 준 영향을 파악하였다. 다음으로 초등교사 6명을 진화 개념 검사지와 진화 신념 검사지 결과에 따라 그룹을 구분하고, 수업 녹음 자료와 면담 자료 등을 바탕으로 교수실행에 차이가 있는지 알아보았다. 연구 결과, 지도서 서술 분석에서 진화 대안개념에 해당하는 서술은 총 18건이었고, 이러한 서술이 교사의 적응 개념과 교수실행에 영향을 주었음을 확인하였다. 다음으로 진화 개념 수준이 높은 그룹과 낮은 그룹은 '적응 개념이 나타난 차시의 중요성 인식', '생물학적 의미의 적응 개념과 일반적 의미의 적응 개념 구분', 그리고 '적응과 진화의 관련성 인식, 수업 중 적응 관련 오류 여부' 부분에서 차이가 나타났고, 진화 신념에 차이를 보이는 수용 그룹, 미정 그룹, 비수용 그룹에 따라 '초등교육과정 내 진화 교육 필요성의 인식, 수업에서 나타나는 본인의 오류에 대한 반응'부분에서 차이를 보였다. 본 연구는 초등교사의 진화 개념 연구를 질적으로 확인하고, 지도서의 서술 오류와 진화 개념 및 신념이 초등교사의 생물학적 적응 개념 교수실행에 미치는 영향에 대해 심층적으로 확인했다는 데 의의가 있다.

• Journal of Dairy Science and Biotechnology
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• 제37권1호
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• pp.49-56
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• 2019

Vulvovaginal candidiasis is a major urogenital infection in women. Lactobacilli are important in maintaining vaginal health. In the present study, the effect of heat adaptation at $47{\sim}52^{\circ}C$ prior to heat stress at $60^{\circ}C$ in improving the viability of Lactobacillus salivarius MG242 was examined. L. salivarius MG242 has antifungal effects against Candida albicans. Heat-adapted cells had a higher survival rate than non-adapted cells during the subsequent heat stress. When chloramphenicol was added during the adaptation process, heat tolerance was abolished, suggesting the involvement of de novo protein synthesis with the heat adaptation of L. salivarius MG242 strain. Exopolysaccharide quantification and scanning election microscopy did not reveal any appreciable changes during heat adaptation. The antifungal activity of L. salivarius MG242 against C. albicans was maintained during the heat adaptation. These results suggest that heat adaptation can be applied for the development of probiotic products using L. salivarius MG242 to improve its stress tolerance during processing.

• KSBB Journal
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• 제32권2호
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• pp.90-95
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• 2017

Mammalian cell cultures have been used extensively to produce proteins for therapeutic agent because of their ability to perform post-translational modification including glycosylation. To produce recombinant protein, many factors and parameter are considered such as media composition, host cell type, and culture process. In this study, recombinant human erythropoietin (rhEPO) producing cell line was established by using glutamine synthetase system. To reduce serum concentration in media, we compared direct adaptation with step adaptation. Cell growth was faster in step adaptation. In low-level serum media, there were insufficient glucose for cell growth. Thus, we added glucose in low-level serum media from 2 g/L to 4.5 g/L. Titer of rhEPO was higher than other conditions at 4.5 g/L of glucose. Additionally, N-methyl-D-aspartate (NMDA), 13-cis-retinal, and pluronic F-68 (PF-68) were added to enhance productivity in CHO cell cultures. In conclusion, we applied CHO cell producing rhEPO to low-level of serum in media using step-adaptation. Also, we confirmed positive effect of NMDA, 13-cis-retinal, and PF-68.

• Journal of Applied Biological Chemistry
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• 제43권4호
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• pp.192-196
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• 2000

The molecular basis of plant adaptation to the environment is one of the most complex areas of plant science and an understanding of this subject is critical to our ability to feed an increasing word population. Research on plant adaptation to the environment often involves two complementary approaches; top-down studies of well-adapted plants with the goal of identifying and describing the biochemical basis of adaptation and bottom-up targeted analysis of specific biochemical mechanisms with the goal of understanding how these mechanisms contribute to overall plant performance. This brief review will provide examples of both of these approaches by describing the study of sorghum's adaptation to dry environments and the role of a blue light responsive chloroplast promoter that helps protect plants against damage by high irradiance.

• 대한의용생체공학회:의공학회지
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• 제28권2호
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• pp.205-211
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• 2007

A novel envelope extraction algorithm for speech processor of cochlear implants, called adaptation algorithm, was developed which is based on a adaptation effect of the inner hair cell(IHC)/auditory nerve(AN) synapse. We achieved acoustic simulation and hearing experiments with 12 normal hearing persons to compare this adaptation algorithm with existent standard envelope extraction method. The results shows that speech processing strategy using adaptation algorithm showed significant improvements in speech recognition rate under most channel/noise condition, compared to conventional strategy We verified that the proposed adaptation algorithm may yield better speech perception under considerable amount of noise, compared to the conventional speech processing strategy.

• The Plant Pathology Journal
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• 제38권2호
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• pp.167-174
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• 2022

Pseudomonas amygdali is a hemibiotrophic phytopathogen that causes disease in woody and herbaceous plants. Complete genomes of four P. amygdali pathovars were comparatively analyzed to decipher the impact of genomic diversity on host colonization. The pan-genome indicated that 3,928 core genes are conserved among pathovars, while 504-1,009 are unique to specific pathovars. The unique genome contained many mobile elements and exhibited a functional distribution different from the core genome. Genes involved in O-antigen biosynthesis and antimicrobial peptide resistance were significantly enriched for adaptation to hostile environments. While the type III secretion system was distributed in the core genome, unique genomes revealed a different organization of secretion systems as follows: type I in pv. tabaci, type II in pv. japonicus, type IV in pv. morsprunorum, and type VI in pv. lachrymans. These findings provide genetic insight into the dynamic interactions of the bacteria with plant hosts.

• Journal of Ecology and Environment
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• 제33권2호
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• pp.115-120
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• 2010

The Asian cultural landscape is a mirrored ecosystem of great complexity, formed by the interaction of man and nature, coupled with a host of ecological processes. The human dependencies on and environmental adaptation of the bio-organisms and the surrounding landscape constitute the typical cultural landscape. Islands are a good example of a cultural landscape, and each mosaic pattern of marine and coastal ecosystems reflects bio-cultural diversity. Along with land-use patterns, wise use of biological organisms and indigenous knowledge has expanded to islands in the Asia-Pacific region in several ways (sea current and human impact, etc.). Loss in biodiversity and landscape diversity as well as cultural diversity owing to global warming and rapid urbanization are emerging issues for island ecosystems all over the world. In order to sustain the historical coexistence between man and natural systems, we ecologists must continue to search for a holistic solution for academic consilience. In this paper, I present the vision and practical characteristics of island ecology with a view toward the conservation of the traditional landscape and bio-cultural diversities in the seascape.