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Search Results: 1 - 10 of 38087 matches for " LIN Chyi Chyang "
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刘 妍,佴文惠,黄 玲,王金焕,苏伟婷,LIN Chyi Chyang,杨凤堂
动物学研究 , 2008,
Abstract: 近年来,分子细胞遗传学研究已基本证实了染色体的串联融合(端粒-着丝粒融合)是麂属动物核型演化的主要重排方式。尽管染色体串联融合的分子机制还不清楚,但通过染色体的非同源重组,着丝粒区域的卫星DNA被认为可能介导了染色体的融合。以前的研究发现在赤麂和小麂染色体的大部分假定的串联融合位点处存在着非随机分布的卫星DNA。然而在麂属的其他物种中,这些卫星DNA的组成以及在基因组中的分布情况尚未被研究。本研究从黑麂和费氏麂基因组中成功地克隆了4种卫星DNA(BMC5、BM700、BM1.1k和FM700),并分析了这些卫星克隆的特征以及在小麂、黑麂、贡山麂和费氏麂染色体上的定位情况。结果表明,卫星I和II DNA (BMC5, BM700和FM700)的信号除了分布在这些麂属动物染色体的着丝粒区域外,也间隔地分布在这些物种的染色体臂上。其研究结果为黑麂、费氏麂和贡山麂的染色体核型也是从一个2n=70的共同祖先核型通过一系列的串联融合进化而来的假说提供了直接的证据。
Gauge Independent Effective Potential and the Higgs Mass Bound
Guey-Lin Lin,Tzu-Kang Chyi
Physics , 1998, DOI: 10.1103/PhysRevD.60.016002
Abstract: We introduce the Vilkovisky-DeWitt formalism for deriving the lower bound of the Higgs boson mass. We illustrate the formalism with a simplified version of the Standard Electroweak Model, where all charged boson fields as well as the bottom-quark field are disregarded. The effective potential obtained in this approach is gauge independent. We derive from the effective potential the mass bound of the Higgs boson. The result is compared to its counterpart obtained from the ordinary effective potential.
Vilkovisky-DeWitt Effective Potential and the Higgs-Mass Bound
Guey-Lin Lin,Tzuu-Kang Chyi
Physics , 1998,
Abstract: We compute the Vilkovisky-DeWitt effective potential of a simplified version of the Standard Electroweak Model, where all charged boson fields as well as the bottom-quark field are neglected. The effective potential obtained in this formalism is gauge-independent. We derive from the effective potential the mass bound of the Higgs boson. The result is compared to its counterpart obtained from the ordinary effective potential.
Deriving the method of images for conductors
Chyi-Lung Lin,Hsien-Yi Lin
Physics , 2010,
Abstract: We start from the simple fact that the method of images can always be used to obtain {\Phi}_{\sigma} (r^\to_in), which is the potential inside conductor produced by induced surface charges. We use this fact to construct image method for outside potential {\Phi}_{\sigma} (r^\to_out). We show that if we can find a relation between {\Phi}_{\sigma} (r^\to_out) and {\Phi}_{\sigma} (r^\to_in), then the image method for {\Phi}_{\sigma} (r^\to_in) can be used to derive the image method for {\Phi}_{\sigma} (r^\toout). The number, the position and the amount of charge of the images can be directly derived. The discussion can be extended to the general n dimensions.
Licensing Contracts in Hotelling Structure  [PDF]
Tarun Kabiraj, Ching Chyi Lee
Theoretical Economics Letters (TEL) , 2011, DOI: 10.4236/tel.2011.13013
Abstract: This paper discusses the question of optimal licensing contracts in Hotelling structure and focuses on the unique features of this structure in this context. We show that a royalty equilibrium exists if and only if transport cost lies in a specified interval, but the royalty rate can be higher than the amount of cost saving. While fee licensing only is never profitable, the optimal licensing contract consists of both fee and royalty. In equilibrium the market is fully covered with monopolistic goods.
Effects of manual lymphatic drainage on breast cancer-related lymphedema: a systematic review and meta-analysis of randomized controlled trials
Huang Tsai-Wei,Tseng Sung-Hui,Lin Chia-Chin,Bai Chyi-Huey
World Journal of Surgical Oncology , 2013, DOI: 10.1186/1477-7819-11-15
Abstract: Background Lymphedema is a common complication of axillary dissection for breast cancer. We investigated whether manual lymphatic drainage (MLD) could prevent or manage limb edema in women after breast-cancer surgery. Methods We performed a systematic review and meta-analysis of published randomized controlled trials (RCTs) to evaluate the effectiveness of MLD in the prevention and treatment of breast-cancer-related lymphedema. The PubMed, EMBASE, CINAHL, Physiotherapy Evidence Database (PEDro), SCOPUS, and Cochrane Central Register of Controlled Trials electronic databases were searched for articles on MLD published before December 2012, with no language restrictions. The primary outcome for prevention was the incidence of postoperative lymphedema. The outcome for management of lymphedema was a reduction in edema volume. Results In total, 10 RCTs with 566 patients were identified. Two studies evaluating the preventive outcome of MLD found no significant difference in the incidence of lymphedema between the MLD and standard treatment groups, with a risk ratio of 0.63 and a 95% confidence interval (CI) of 0.14 to 2.82. Seven studies assessed the reduction in arm volume, and found no significant difference between the MLD and standard treatment groups, with a weighted mean difference of 75.12 (95% CI, 9.34 to 159.58). Conclusions The current evidence from RCTs does not support the use of MLD in preventing or treating lymphedema. However, clinical and statistical inconsistencies between the various studies confounded our evaluation of the effect of MLD on breast-cancer-related lymphedema.
Alternative Functions of Arabidopsis YELLOW STRIPE-LIKE3: From Metal Translocation to Pathogen Defense
Chyi-chuann Chen, Wei-Fu Chien, Nai-Chun Lin, Kuo-Chen Yeh
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0098008
Abstract: YELLOW STRIPE-LIKE1 (YSL1) and YSL3 are involved in iron (Fe) and copper (Cu) translocation. Previously, we reported that upregulation of YSL1 and YSL3 under excess Cu caused high accumulation of Cu in the siz1 mutant, impaired in small ubiquitin-like modifier (SUMO) E3 ligase. Interestingly, the siz1 mutant contains high levels of salicylic acid (SA), involved in plant defense against biotrophic pathogens. In this study, we found that YSL1 and YSL3 were upregulated by SA. SA-regulated YSL3 but not YSL1 depended on NONEXPRESSOR OF PR1 (NPR1). Susceptibility to the pathogen Pseudomonas syringe pv. tomato (Pst) DC3000 was greater for ysl3 than the wild type. Also, during Pst DC3000 infection, YSL3 was positively regulated by SA signaling through NPR1 and the upregulation was enhanced in the coi1 mutant that defective in the jasmonic acid (JA) receptor, CORONATINE INSENSITIVE1. This line of evidence indicates that the regulation of YSL3 is downstream of SA signaling and interplays with JA signaling for involvement in pathogen-induced defense. We provide new insights into the biological function of the metal transporter YSL3 in plant pathogen defense.
Nonspreading wave packets in a general potential V(x,t) in one dimension
Chyi-Lung Lin,Meng-Jie Huang,Te-Chih Hsiung
Physics , 2008,
Abstract: We discuss nonspreading wave packets in one dimensional Schr\"{o}dinger equation. We derive general rules for constructing nonspreading wave packets from a general potential $\textmd{V}(x,t)$. The essential ingredients of a nonspreading wave packet, the shape function $f(x)$, the motion $d(t)$, the phase function $\phi(x,t)$ are derived. Since the form of the shape of a nonspreading wave packet does not change in time, the shape equation should be time independent. We show that the shape function $f(x)$ is the eigenfunction of the time independent Schr\"{o}dinger equation with an effective potential $V_{\textmd{eff}}$ and an energy $E_{\textmd{eff}}$. We derive nonspreading wave packets found by Schr\"{o}dinger, Senitzky, and Berry and Balazs as examples. We show that most stationary potentials can only support stationary nonspreading wave packets. We show how to construct moving nonspreading wave packets from time dependent potentials, which drive nonspreading wave packets into an arbitrary motion.
Etiologic factors of gastric cardiac adenocarcinoma among men in Taiwan
Mei-Ju Chen, Deng-Chyang Wu, Jia-Ming Lin, Ming-Tsang Wu, Fung-Chang Sung
World Journal of Gastroenterology , 2009,
Abstract: AIM: To elucidate etiologic associations between Helicobacter pylori (H pylori), lifestyle, environmental factors and gastric cardiac adenocarcinoma (GCA) among men.METHODS: A hospital-based case-control study was conducted in Taiwan from 2000 to 2009. All cases were newly confirmed as primary GCA. Five controls were selected matching with age, sex, and admission date to each case. Participants were informed of potential risk factors with a structured questionnaire by trained interviewers during hospitalization and provided a blood sample for the determination of H pylori infection. Odds ratio (OR) and 95% confidence interval (95% CI) were used to evaluate risk, and a multivariate conditional logistic regression model was performed.RESULTS: All participants recruited for this study were men, consisting of 41 cases and 205 controls. Results of the univariate analysis showed that significant factors associated with the etiology of GCA included H pylori (OR = 2.69, 95% CI = 1.30-5.53), cigarette smoking (OR = 2.28, 95% CI = 1.05-4.96), working or exercising after meals (OR = 3.26, 95% CI = 1.31-8.11), salted food (OR = 2.51, 95%CI = 1.08-6.11), fresh vegetables (OR = 0.28, 95% CI = 0.09-0.80), fruits (OR = 0.19, 95% CI = 0.04-0.89), and rice as principal food (OR = 0.53, 95% CI = 0.30-0.85). Multivariate conditional logistic regression models indicated that a significantly elevated risk of contracting GCA was associated with working or exercising after meals (OR = 3.18, 95% CI = 1.23-9.36) and H pylori infection (OR = 2.93, 95% CI = 1.42-6.01). In contrast, the consumption of fresh vegetables (OR = 0.22, 95% CI = 0.06-0.83), fruits (OR = 0.28, 95% CI = 0.09-0.79) and rice as principal food (OR = 0.48, 95% CI = 0.24-0.93) remained as significant beneficial factor associated with GCA.CONCLUSION: Working or exercising after meals and H pylori infection increase the risk of GCA, but higher intakes of rice, fresh vegetables and fruits reduce the risk.
Performance of Routine Helicobacter pylori Invasive Tests in Patients with Dyspepsia
Hsi-Chang Lee,Ting-Chang Huang,Chin-Lin Lin,Kuan-Yang Chen,Chung-Kwe Wang,Deng-Chyang Wu
Gastroenterology Research and Practice , 2013, DOI: 10.1155/2013/184806
Abstract: Background. This study was designed to compare the accuracy of three different invasive methods for the detection of Helicobacter pylori (H. pylori) infection in patients with dyspepsia. These tests included culture, histology, and the rapid urease test (CLO test). Methods. H. pylori infection was diagnosed prospectively in 246 untreated dyspeptic patients who underwent upper gastrointestinal endoscopy. The gold standard for H. pylori infection was based on a positive culture or both a positive histological examination and a CLO test. Results. H. pylori was diagnosed in 33.3% of the patients. The sensitivity, specificity, positive predictive value, negative predictive value, and overall accuracy were as follows: histology from the antrum (95.12; 95.12; 90.7; 97.5; 95.12%); histology from the antrum and corpus (95.12; 95.12; 90.7; 97.5; 95.12%); histology from the corpus (76.83; 96.95; 92.65; 89.33; 90.24%); culture (91.46; 100; 100; 95.91; 97.15%); a CLO test from the antrum and corpus (85.59; 100; 100; 93.71; 95.52%); a CLO test from the antrum (64.63; 100; 100; 84.97; 88.21%); a CLO test from the corpus (69.51; 100; 100; 96.77; 89.83%), respectively. Conclusions. Antral biopsy histology and culture are the best methods for the diagnosis of H. pylori infection in our cohort of patients with dyspepsia. 1. Introduction Helicobacter pylori infection is very common worldwide, occurring in 40% to 50% of the population in developed countries, in 80% to 90% of the population in developing regions [1], and about 50% of the population in Taiwan [2]. The infection causes chronic gastritis which significantly increases the risk of developing gastric or duodenal ulcer [3, 4], gastric adenocarcinoma, and mucosa-associated lymphoid tissue (MALT) lymphoma [5, 6]. As the eradication of H. pylori has been shown to improve the outcome of peptic ulcer disease in terms of recurrence and complications, the accurate diagnosis of H. pylori infection is of clinical importance. Several methods have been developed for the detection of H. pylori infection. These methods include noninvasive tests that are based on the detection of antibodies to H. pylori or the urea breath test (UBT) or invasive tests that require endoscopy to obtain tissue biopsies, such as the rapid urease test (RUT), culture, and histological examination [7–9]. Each test has advantages and disadvantages, which make it more or less appropriate for different situations. Of all the available tests, invasive tests are considered the most accurate. However, invasive tests are mainly limited by their proneness to
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