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Search Results: 1 - 10 of 22346 matches for " Lung-Chang Tsai "
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Thermal Hazard Evaluation of Lauroyl Peroxide Mixed with Nitric Acid
Lung-Chang Tsai,Mei-Li You,Mei-Fang Ding,Chi-Min Shu
Molecules , 2012, DOI: 10.3390/molecules17078056
Abstract: Many thermal runaway incidents have been caused by organic peroxides due to the peroxy group, –O–O–, which is essentially unstable and active. Lauroyl peroxide (LPO) is also sensitive to thermal sources and is incompatible with many materials, such as acids, bases, metals, and ions. From the thermal decomposition reaction of various concentrations of nitric acid (HNO3) (from lower to higher concentrations) with LPO, experimental data were obtained as to its exothermic onset temperature (T0), heat of decomposition (ΔHd), isothermal time to maximum rate (TMRiso), and other safety parameters exclusively for loss prevention of runaway reactions and thermal explosions. As a novel finding, LPO mixed with HNO3 can produce the detonation product of 1-nitrododecane. We used differential scanning calorimetry (DSC), thermal activity monitor III (TAM III), and gas chromatography/mass spectrometer (GC/MS) analyses of the reactivity for LPO and itself mixed with HNO3 to corroborate the decomposition reactions and reaction mechanisms in these investigations.
Mozart K.545 Mimics Mozart K.448 in Reducing Epileptiform Discharges in Epileptic Children
Lung-Chang Lin,Mei-Wen Lee,Ruey-Chang Wei,Hin-Kiu Mok,Hui-Chuan Wu,Chin-Lin Tsai,Rei-Cheng Yang
Evidence-Based Complementary and Alternative Medicine , 2012, DOI: 10.1155/2012/607517
Abstract: Mozart K.448 has been shown to improve cognitive function, leading to what is known as the Mozart Effect. Our previous work reveals positive effects of Mozart K.448 in reducing epileptiform discharges in epileptic children. In this study, we evaluated the effect of Mozart K.545 and compared the effects with those of Mozart K.448 on epileptiform discharges in children with epilepsy. Thirty-nine epileptic children with epileptiform discharges were included in the study. They received electroencephalogram examinations before, during, and after listening to Mozart K.448 and K.545, one week apart, respectively. The frequencies of epileptiform discharges were compared. There was a significant decrease in the frequency of epileptiform discharges during and right after listening to Mozart K.448 and K.545 (reduced by % during Mozart K.448 and % after Mozart K.448; and % during Mozart K.545 and % after Mozart K.545). Spectrogrammatic analysis of the two pieces of music demonstrated that both share similar spectrogrammatic characteristics. Listening to Mozart K.448 and K.545 decreased the epileptiform discharges in epileptic children. This suggests that Mozart K.448 is not the only piece of music to have beneficial effects on children with epilepsy. Other music with lower harmonics may also decrease epileptiform discharges in epileptic children. 1. Introduction Music has been used to improve physical and mental illnesses. Rauscher et al. first report the “Mozart Effect” in 1993. They note that Stanford-Binet spatial task scores improve immediately after listening to Mozart’s Sonata for Two Pianos in D major, K.448 (Mozart K.448) for ten minutes, when compared to the same time of silence or relaxation instruction [1]. Rauscher suggests that cognitive processing is improved by listening to Mozart’s music. Subsequent studies demonstrate the beneficial effects of listening to music for many neurologic diseases, including Parkinson’s disease, senile dementia, and sleep disorder [2–4]. Regarding epilepsy, Hughes et al. and our previous study show that the epileptiform discharges decrease when listening to Mozart K.448 in patients with epilepsy [5, 6]. In addition, our study shows that harmonics are associated with decreasing epileptiform discharges. However, whether Mozart K.448 is the only piece of music that can effectively reduce epileptiform discharges remains unclear. In the present study, we used another piece of Mozart’s music, Mozart Piano Sonata No. 16 in C major (Mozart K.545), with similar harmonics to Mozart K.448, to study the role of the harmonics of the
Asian Dust Storm Elevates Children’s Respiratory Health Risks: A Spatiotemporal Analysis of Children’s Clinic Visits across Taipei (Taiwan)
Hwa-Lung Yu, Lung-Chang Chien, Chiang-Hsing Yang
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0041317
Abstract: Concerns have been raised about the adverse impact of Asian dust storms (ADS) on human health; however, few studies have examined the effect of these events on children’s health. Using databases from the Taiwan National Health Insurance and Taiwan Environmental Protection Agency, this study investigates the documented daily visits of children to respiratory clinics during and after ADS that occurred from 1997 to 2007 among 12 districts across Taipei City by applying a Bayesian structural additive regressive model controlled for spatial and temporal patterns. This study finds that the significantly impact of elevated children’s respiratory clinic visits happened after ADS. Five of the seven lagged days had increasing percentages of relative rate, which was consecutively elevated from a 2-day to a 5-day lag by 0.63%~2.19% for preschool children (i.e., 0~6 years of age) and 0.72%~3.17% for school children (i.e., 7~14 years of age). The spatial pattern of clinic visits indicated that geographical heterogeneity was possibly associated with the clinic’s location and accessibility. Moreover, day-of-week effects were elevated on Monday, Friday, and Saturday. We concluded that ADS may significantly increase the risks of respiratory diseases consecutively in the week after exposure, especially in school children.
Mozart K.545 Mimics Mozart K.448 in Reducing Epileptiform Discharges in Epileptic Children
Lung-Chang Lin,Mei-Wen Lee,Ruey-Chang Wei,Hin-Kiu Mok
Evidence-Based Complementary and Alternative Medicine , 2012, DOI: 10.1155/2012/607517
Abstract:
Auricular Point Acupressure for Chronic Low Back Pain: A Feasibility Study for 1-Week Treatment
Chao-Hsing Yeh,Lung-Chang Chien,Yi-Chien Chiang,Li-Chun Huang
Evidence-Based Complementary and Alternative Medicine , 2012, DOI: 10.1155/2012/383257
Abstract: Objectives. The objective of this one-group, repeated-measures design was to explore the acceptance of auricular point acupressure (APA) to reduce chronic low back pain (CLBP) and estimate minimum clinically important differences (MCIDs) for pain intensity change. Methods. Subjects received 7-day APA treatment. After appropriate acupoints were identified, vaccaria seeds were carefully taped onto each selected auricular point for 7-day. The Brief Pain Inventory Short Form (BPI) was used to collect outcome data. Results. A total of 74 subjects participated in the study. Ten subjects dropped out and the retention rate was 87%. Subjects reported a 46% reduction in BPI worst pain, and over 50% reduction in BPI average pain, overall pain severity and pain interference by the end of study, and 62.5% subjects also reported less pain medication use. The MCIDs for the subscale of BPI ranged from .70 to 1.86 points. The percentage improvement of MCIDs from baseline was between 14.5–24.9%. Discussion. APA appears to be highly acceptable to patients with CLBP. A sham group is needed in order to differentiate the true effects of APA from the possible psychological effects of more frequent visits by the auricular therapist and patients’ expectation of the APA treatment.
Influence of Primary Care Physician Availability and Socioeconomic Deprivation on Breast Cancer from 1988 to 2008: A Spatio-Temporal Analysis
Lung-Chang Chien, Anjali D. Deshpande, Donna B. Jeffe, Mario Schootman
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0035737
Abstract: Background Breast cancer is the most commonly diagnosed cancer and the second leading cause of cancer death among women in the United States. It is unclear how county-level primary care physician (PCP) availability and socioeconomic deprivation affect the spatial and temporal variation of breast cancer incidence and mortality. Methods We used the 1988–2008 public-use county-based data from nine Surveillance, Epidemiology, and End Results (SEER) programs to analyze the temporal and spatial disparity of PCP availability and socioeconomic deprivation on early-stage incidence, advanced-stage incidence and breast cancer mortality. The spatio-temporal analysis was implemented by a novel structural additive modeling approach. Results Greater PCP availability was significantly associated with higher early-stage incidence, advanced-stage incidence and mortality during the entire study period while socioeconomic deprivation was significantly negatively associated with early-stage incidence, advanced-stage incidence, and mortality up to 1992. However, the observed influence of PCP availability and socioeconomic deprivation varied by county. Conclusions We showed important associations of PCP availability and socioeconomic deprivation with the three breast cancer indicators. However, the effect of these associations varied over time and across counties. The association of PCP availability and socioeconomic deprivation was stronger in selected counties.
Can concurrent core biopsy and fine needle aspiration biopsy improve the false negative rate of sonographically detectable breast lesions?
Yao-Lung Kuo, Tsai-Wang Chang
BMC Cancer , 2010, DOI: 10.1186/1471-2407-10-371
Abstract: Over a seven-year period, 2053 patients with sonographically detectable breast lesions underwent concurrent ultrasound-guided CNB and FNAB. The sonographic and histopathological findings were classified into four categories: benign, indeterminate, suspicious, and malignant. The histopathological findings were compared with the definitive excision pathology results. Patients with benign core biopsies underwent a detailed review to determine the false-negative rate. The correlations between the ultrasonography, FNAB, and CNB were determined.Eight hundred eighty patients were diagnosed with malignant disease, and of these, 23 (2.5%) diagnoses were found to be false-negative after core biopsy. After an intensive review of discordant FNAB results, the final false-negative rate was reduced to 1.1% (p-value = 0.025). The kappa coefficients for correlations between methods were 0.304 (p-value < 0.0001) for ultrasound and FNAB, 0.254 (p-value < 0.0001) for ultrasound and CNB, and 0.726 (p-value < 0.0001) for FNAB and CNB.Concurrent CNB and FNAB under ultrasound guidance can provide accurate preoperative diagnosis of breast lesions and provide important information for appropriate treatment. Identification of discordant results using careful radiological-histopathological correlation can reduce the false-negative rate.Breast cancer has become a serious threat to women's health in Taiwan over recent decades. Breast cancer ranks fourth among the top 10 causes of death from cancer in women, and the death rate has increased from 5 to 12.8 per 100,000 population in the past two decades (data from the Bureau of Health Promotion, Department of Health, Taiwan; http://www.doh.gov.tw/statistic/data webcite). Because of this increase in the death rate, screening has become more important in health care in Taiwan, and screening programs with mammography and ultrasound (US) are used routinely. However, as in several Asian countries, Taiwanese women have smaller breasts and denser breast t
Accuracy validation of adjuvant! online in Taiwanese breast cancer patients - a 10-year analysis
Yao-Lung Kuo,Dar-Ren Chen,Tsai-Wang Chang
BMC Medical Informatics and Decision Making , 2012, DOI: 10.1186/1472-6947-12-108
Abstract: Background Adjuvant! Online ( http://www.adjuvantonline.com) is an Internet-based software program that allows clinicians to make predictions about the benefits of adjuvant therapy and 10-year survival probability for early-stage breast cancer patients. This model has been validated in Western countries such as the United States, United Kingdom, Canada, Germany, and Holland. The aim of our study was to investigate the performance and accuracy of Adjuvant! Online in a cohort of Taiwanese breast cancer patients. Methods Data on the prognostic factors and clinical outcomes of 559 breast cancer patients diagnosed at the National Cheng Kung University Hospital in Tainan between 1992 and 2001 were enrolled in the study. Comprehensive demographic, clinical outcome data, and adjuvant treatment data were entered into the Adjuvant! Online program. The outcome prediction at 10 years was compared with the observed and predicted outcomes using Adjuvant! Online. Results Comparison between low- and high-risk breast cancer patient subgroups showed significant differences in tumor grading, tumor size, and lymph node status (p < 0.0001). The mean 10-year predicted death probability in 559 patients was 19.44%, and the observed death probability was 15.56%. Comparison with the Adjuvant! Online-predicted breast cancer-specific survival (BCSS) showed significant differences in the whole cohort (p < 0.001). In the low-risk subgroup, the predicted and observed outcomes did not differ significantly (3.69% and 3.85%, respectively). In high-risk patients, Adjuvant! Online overestimated breast cancer-specific survival (p = 0.016); the predicted and observed outcomes were 21.99% and 17.46%, respectively. Conclusions Adjuvant! Online accurately predicted 10-year outcomes and assisted in decision making about adjuvant treatment in low-risk breast cancer patients in our study, although the results were less accurate in the high-risk subgroup. Development of a prognostic program based on a national database should be considered, especially for high-risk breast cancer patients in Taiwan.
Repeated Small Perturbation Approach Reveals Transcriptomic Steady States
Ching-Lung Huang, Wun-Yi Shu, Min-Lung Tsai, Chi-Shiun Chiang, Cheng-Wei Chang, Chiu-Ting Chang, Ian C. Hsu
PLOS ONE , 2011, DOI: 10.1371/journal.pone.0029241
Abstract: The study of biological systems dynamics requires elucidation of the transitions of steady states. A “small perturbation” approach can provide important information on the “steady state” of a biological system. In our experiments, small perturbations were generated by applying a series of repeating small doses of ultraviolet radiation to a human keratinocyte cell line, HaCaT. The biological response was assessed by monitoring the gene expression profiles using cDNA microarrays. Repeated small doses (10 J/m2) of ultraviolet B (UVB) exposure modulated the expression profiles of two groups of genes in opposite directions. The genes that were up-regulated have functions mainly associated with anti-proliferation/anti-mitogenesis/apop?tosis,and the genes that were down-regulated were mainly related to proliferation/mitogenesis/anti-apoptosis?.For both groups of genes, repetition of the small doses of UVB caused an immediate response followed by relaxation between successive small perturbations. This cyclic pattern was suppressed when large doses (233 or 582.5 J/m2) of UVB were applied. Our method and results contribute to a foundation for computational systems biology, which implicitly uses the concept of steady state.
Identification of Human Housekeeping Genes and Tissue-Selective Genes by Microarray Meta-Analysis
Cheng-Wei Chang, Wei-Chung Cheng, Chaang-Ray Chen, Wun-Yi Shu, Min-Lung Tsai, Ching-Lung Huang, Ian C. Hsu
PLOS ONE , 2011, DOI: 10.1371/journal.pone.0022859
Abstract: Background Categorizing protein-encoding transcriptomes of normal tissues into housekeeping genes and tissue-selective genes is a fundamental step toward studies of genetic functions and genetic associations to tissue-specific diseases. Previous studies have been mainly based on a few data sets with limited samples in each tissue, which restrained the representativeness of their identified genes, and resulted in low consensus among them. Results This study compiled 1,431 samples in 43 normal human tissues from 104 microarray data sets. We developed a new method to improve gene expression assessment, and showed that more than ten samples are needed to robustly identify the protein-encoding transcriptome of a tissue. We identified 2,064 housekeeping genes and 2,293 tissue-selective genes, and analyzed gene lists by functional enrichment analysis. The housekeeping genes are mainly involved in fundamental cellular functions, and the tissue-selective genes are strikingly related to functions and diseases corresponding to tissue-origin. We also compared agreements and related functions among our housekeeping genes and those of previous studies, and pointed out some reasons for the low consensuses. Conclusions The results indicate that sufficient samples have improved the identification of protein-encoding transcriptome of a tissue. Comprehensive meta-analysis has proved the high quality of our identified HK and TS genes. These results could offer a useful resource for future research on functional and genomic features of HK and TS genes.
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