• Journal of Forest and Environmental Science
• /
• v.40 no.3
• /
• pp.259-264
• /
• 2024

Dalbergia sissoo and Dalbergia latifolia are the two most important timber wood species that are indigenous to the Indo-Pak subcontinent producing very high-quality timber. Its wood is used to produce high-quality furniture. Due to overexploitation and dieback disease, their production is seriously hampered and threatens their genetic diversity. Several ecotypes are tolerant to dieback thus offering an opportunity to develop a superior hybrid for the establishment of plantations for hybrid seed production. Hybrid evaluation can only be done by using DNA markers such as SSR markers. Cross-specific amplification of SSR markers is a cost-effective way of producing DNA markers for species lacking genetic information. Here, we report for the first-time successful cross-amplification of SSR markers in Dalbergia latifolia and added new SSR markers in D. sissoo. Cross-species amplification resulted in 13 successful SSR markers in D. latifolia and an addition of 14 markers in D. sissoo of expected sizes. Six SSR markers were further selected randomly to validate the breeding behavior of both species. A diverse DNA profile of seed progenies matched to different pollen donors deviated from the same mother suggested cross-pollination is the most likely mechanism of seed production in D. sissoo and D. latifolia. However, the results must be validated by using a large sample size and through controlled pollinations. SSR markers thus developed will be useful in the conservation and development of superior hybrids for sustainable development and production of commercial populations in Dalbergia sissoo and D. latifolia.

• Asian Pacific Journal of Cancer Prevention
• /
• v.17 no.4
• /
• pp.2067-2073
• /
• 2016

Purpose: The aim of the study was to identify risk and protective factors/markers for cervical cancer and cervical intraepithelial neoplasia 3 (CIN3) in Israeli Jewish women in order to settle the discrepancy of low incidence rate of cervical cancer and relatively high incidence rate of CIN3. Materials and Methods: We conducted two case control studies, which examined the association between potential risk and protective factors/markers for cervical cancer or CIN3 using self administered detailed questionnaires. Results: For studying cervical cancer, 40 cases and 40 matched controls were interviewed. In the univariable and multivariable analyses older age, depression or anxiety and ever smoking seemed to act as independent risk factors/markers, while older age at first intercourse was protective. For studying CIN3, 99 cases and 79 controls were interviewed. Multivariable analysis has demonstrated that being born in Israel, depression or anxiety and ever smoking were independent risk factors/markers for CIN3. Conclusions: The risk factors/markers studied, that were associated with cervical cancer or CIN3 among Jewish women in Israel, are similar to those reported in other parts of the world, and do not explain the observed discrepancy of high in-situ cervical cancer rates and low invasive cervical cancer incidence in Israel.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
• /
• v.31 no.3
• /
• pp.154-160
• /
• 2020

Objectives: It remains unclear whether methylphenidate (MPH) has yadverse effects on growth in children. This study aimed to investigate the association of MPH with serum biological markers of growth in children with attention-deficit/hyperactivity disorder (ADHD). Methods: The present study included 103 children with ADHD (64 drug-naive children, 39 MPH-treated children) and 112 control subjects. Children with ADHD were diagnosed on the basis of a semi-structured interview. Levels of biochemical markers of growth, including insulin-like growth factor-I, thyroid stimulating hormone (TSH), free T₄, calcium, phosphorus, alkaline phosphatase, vitamin D, hemoglobin, total protein, albumin, total cholesterol, and hematocrit were measured in these individuals. Results: Except in case of TSH, no intergroup differences were found in the levels of the growth markers. The levels of TSH were found to be lower in the MPH-treated boys with ADHD than in the drug-naive and control groups (p<0.05), although the levels of TSH in all the groups were within normal limits. Conclusion: In this cross-sectional study, no significant association was found between MPH and growth markers. This calls for the need to carry out prospective longitudinal research studies in the future that investigate the effect of MPH on the growth trajectory in children.

• Genomics & Informatics
• /
• v.10 no.2
• /
• pp.117-122
• /
• 2012

A sample size with sufficient statistical power is critical to the success of genetic association studies to detect causal genes of human complex diseases. Genome-wide association studies require much larger sample sizes to achieve an adequate statistical power. We estimated the statistical power with increasing numbers of markers analyzed and compared the sample sizes that were required in case-control studies and case-parent studies. We computed the effective sample size and statistical power using Genetic Power Calculator. An analysis using a larger number of markers requires a larger sample size. Testing a single-nucleotide polymorphism (SNP) marker requires 248 cases, while testing 500,000 SNPs and 1 million markers requires 1,206 cases and 1,255 cases, respectively, under the assumption of an odds ratio of 2, 5% disease prevalence, 5% minor allele frequency, complete linkage disequilibrium (LD), 1:1 case/control ratio, and a 5% error rate in an allelic test. Under a dominant model, a smaller sample size is required to achieve 80% power than other genetic models. We found that a much lower sample size was required with a strong effect size, common SNP, and increased LD. In addition, studying a common disease in a case-control study of a 1:4 case-control ratio is one way to achieve higher statistical power. We also found that case-parent studies require more samples than case-control studies. Although we have not covered all plausible cases in study design, the estimates of sample size and statistical power computed under various assumptions in this study may be useful to determine the sample size in designing a population-based genetic association study.

• Korean Journal of Medicinal Crop Science
• /
• v.19 no.3
• /
• pp.185-190
• /
• 2011

The principal objective of this study was to develop a discrimination method using SSR markers in Korean ginseng cultivars. Five cultivars--Chunpoong, Yunpoong, Gopoong, Sunpoong, and Kumpoong--were evaluated by nine markers out of 22 SSR markers. A total of 23 alleles were detected, ranging from 1 to 4, with an average of 2.6 alleles per locus, and an averages of gene diversity (GD) of 0.480. Nine markers were tested in order to distinguish among five Korean ginseng cultivars. Two markers out of nine SSR markers, GB-PG-065 and GB-PG-142, were selected as key markers for discrimination among Korean ginseng cultivars. Two genotypes were detected in GB-PG-065. Chunpoong and Kumpoong shared the same allele type, and Yunpoong, Gopoong, and Sunpoong shared another identical allele type. In the case of GB-PG-142, a specific allele type differentiated from those of other four cultivars was observed only in Sunpoong cultivar. Consequently, the SSR markers developed in this study may prove useful for the identification of Korean ginseng cultivars and the development of ginseng seed management systems, as well as tests to guarantee the purity of ginseng seeds.

• The Journal of Korea Robotics Society
• /
• v.18 no.2
• /
• pp.197-202
• /
• 2023

This paper studies the method to extend the sensing range of a fiducial maker using a tilt camera. In the system that uses a fiducial marker to estimate their position on a map, the sensing range of the marker is an important issue. Although there are markers around, a robot with a fixed camera often misses nearby markers in the case that the viewing angle of the camera does not cover the sensing range of the marker. If the robot adjusts the viewing angle of a camera by adjusting the position information of the markers, this problem will be solved. The contribution of this paper is as follows. 1) Structural considerations for the tilting module of cameras attached to robots. 2) Tilting module control method considering the position of a marker and a robot. 3) Finally, verification of the differences in the sensing range of markers between the proposed system and the previous system.

• (The)Study of the Eastern Classic
• /
• no.33
• /
• pp.413-435
• /
• 2008

This study is purposed to analyze the appearances and functions of ellipsis of case markers through the Hangul letters of Hyun-Poong Kwak's family in the early 17th century. Hangul letters appear more colloquial than typography, and ellipsis is the one of main features of it. Generally, 'ellipsis' occurs when a constituent of a sentence deliberately leaves out of a sentence, because it is repeated or can be deduced by the context or occasion. As Hangul letter is written for a specific person, 'ellipsis' occurs more often than typography written for unspecified individuals. The ellipsis of case markers are not an exception. The ellipsis has functions as follow. The first, function is 'brevity.' Communication can be more convenient by ellipsis. Next will be 'informality.' Informality caused by ellipsis can make people express their thoughts and feelings fluently and naturally. It is the reason that spoken language has more frequently occurred ellipses than written language. The third function is 'quickness.' The same information can be delivered more quickly by the sentence using ellipsis than not using. In the 21st Century, ellipsis is misused in netizen communication owing to the quickness. The last function should be 'the effect of a literary style.' The effects can embody through ellipsis such as 'rhythm effect', 'letter style effect', 'translation style effect.' As a result of analyzing ellipsis of case markers, frequency follows the order below.[subjective objective > Locative > Dative > Commutative > Instrumental]

• Korean Journal of Child Studies
• /
• v.27 no.2
• /
• pp.1-14
• /
• 2006

This study examined the spontaneous utterances of 20 1-2 year old Korean-Chinese children in Yanji, China by videotaping their spontaneous natural speech during interaction with his/her caregiver for 30 minutes on 4 separate occasions. Utterances were transcribed and coded by nominative and accusative case markers; then analyzed by grammatical functions. Results showed that the order and pattern of the acquisition of the case marking system of Korean-Chinese bilinguals differed from that of Korean monolinguals. Bilinguals used the accusative marker -lul earlier than the nominative marker-ka and overextended the accusative marker more often than the nominative marker. These results are consistent with those of Gathercole (in press) who found that bilingual children differed from monolinguals in mastering grammar.

• Journal of Korean Biological Nursing Science
• /
• v.10 no.2
• /
• pp.184-193
• /
• 2008

Purpose: Anxiety and depression are the concepts that commonly used as an emotional approach in the nursing researches and most of researches have been used questionnaires as a marker of anxiety and depression. There were few researches using physiological markers in measuring anxiety and depression. Methods: Journals published between 1950 and 2007 that include depression and anxiety measuring through physiological markers were reviewed. Results: As in the case of the hypothlamus-pituitary-adrenal axis system, it appeared that cortisol, epinephrine, and norepinephrine belonged to the category of hormones which were responsive to anxiety and depression. Plasma norepinephrine was a marker of the anxiety whereas plasma cortisol was a marker of the depression. The anxiety and depression were correlated with immune and taste, but it considered as an outcome variable not a physiological marker. Conclusion: Catecholamine and cortisol reflect anxiety and depression state. Our findings suggest that further researches are needed to distinguish between markers and outcomes of depression and anxiety using physiological markers.

• Journal of Animal Science and Technology
• /
• v.64 no.5
• /
• pp.830-841
• /
• 2022

Genetic analysis has great potential as a tool to differentiate between different species and breeds of livestock. In this study, the optimal combinations of single nucleotide polymorphism (SNP) markers for discriminating the Yeonsan Ogye chicken (Gallus gallus domesticus) breed were identified using high-density 600K SNP array data. In 3,904 individuals from 198 chicken breeds, SNP markers specific to the target population were discovered through a case-control genome-wide association study (GWAS) and filtered out based on the linkage disequilibrium blocks. Significant SNP markers were selected by feature selection applying two machine learning algorithms: Random Forest (RF) and AdaBoost (AB). Using a machine learning approach, the 38 (RF) and 43 (AB) optimal SNP marker combinations for the Yeonsan Ogye chicken population demonstrated 100% accuracy. Hence, the GWAS and machine learning models used in this study can be efficiently utilized to identify the optimal combination of markers for discriminating target populations using multiple SNP markers.