Production of a Recombinant Laccase from Pichia pastoris and Biodegradation of Chlorpyrifos in a Laccase/Vanillin System

( Hui fang Xie ),( Qi Li ),( Min Min Wang ),( Lin Guo Zhao ) 한국미생물 · 생명공학회 2013 Journal of microbiology and biotechnology Vol.23 No.6

The recombinant strain P. pastoris GS115-lccC was used to produce laccase with high activity. Factors influencing laccase expression, such as pH, methanol concentration, copper concentration, peptone concentration, shaker rotate speed, and medium volume were investigated. Under the optimal conditions, laccase activity reached 12,344 U/L on day 15. The recombinant enzyme was purified by precipitating and dialyzing to electrophoretic homogeneity, and was estimated to have a molecular mass of about 58 kDa. When guaiacol was the substrate, the laccase showed the highest activity at pH 5.0 and was stable when the pH was 4.5~6.0. The optimal temperature for the laccase to oxidize guaiacol was 60℃, but it was not stable at high temperature. The enzyme could remain stable at 30℃ for 5 days. The recombinant laccase was used to degrade chlorpyrifos in several laccase/mediator systems. Among three synthetic mediators (ABTS, HBT, VA) and three natural mediators (vanillin, 2,6-DMP, and guaiacol), vanillin showed the most enhancement on degradation of chlorpyrifos. Both laccase and vanillin were responsible for the degradation of chlorpyrifos. A higher dosage of vanillin may promote a higher level of degradation of chlorpyrifos, and the 2-step addition of vanillin led to 98% chlorpyrifos degradation. The degradation of chlorpyrifos was faster in the L/V system (kobs = 0.151) than that in the buffer solution (kobs = 0.028).

Explore psychological and social development and life attitude of the nursing students from the five year nursing programs

Hui-Lin Sun,Chia-Ling Yang,Yen-Hui Wang,Tien-Hui Luo,Pen-Hsin Hou 한국간호과학회 2019 한국간호과학회 학술대회 Vol.2019 No.10

Living Experiences of Male Spouses of Patients with Metastatic Cancer in Taiwan

Lin, Hui-Chen,Lin, Wen-Chuan,Lee, Tzu-Ying,Lin, Hung-Ru Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.1

Background: Cancer is the leading cause of death in Taiwan. Spouses are generally the main caregivers of affectyed patients but previous studies have seldom investigated the needs of male spouses of patients with metastatic cancer. Purpose: To explore the lived experiences of such male spouses. Methods: A qualitative design using in-depth interviewswasconducted with male spouses of patients with metastatic cancer being treated at the oncology outpatient department in a teaching hospital in northern Taiwan. Results: Nine participants aged 31-78 were interviewed. Content analysis of the interviews revealed five themes: suffering and struggling, difficulty in focusing on communication and interaction, shouldering responsibility, cherishing the love between husband and wife, and enabling each other to live better. This study demonstrated how male spousse experienced physical and psychological suffering when their wives suffered from metastatic cancer. They had to bear the pain of their wife's suffering, and also had to shoulder the responsibility for everything. All their efforts were put towards enabling each other to live a better life. They cherished the rest of the time they could spend with their wives, even though they had to live a hard life. As the male spouses of patients with metastatic cancer, the participants exhibited both the masculinity of men and the ability to express care and tenderness. Conclusions: The results showed that male spouses need more attention in terms of communication and bearing with suffering. Health care professionals should more actively understand the needs and provide assistance when facing the male spouse of patients with cancer, so as make sure that they possess the ability to take care of their wives. Health care professionals should also assist and properly act as a bridge of communication between husbands and wives.

Non-atypical endometrial hyperplasia: risk factors for occult endometrial atypia and malignancy in patients managed with hysterectomy

Lee Shi Hui,Selina Hui Men Chin,Charissa Goh,Lin Xiao Hui,Manisha Mathur,Timothy Lim Yong Kuei,Felicia Chin Hui Xian 대한산부인과학회 2021 Obstetrics & Gynecology Science Vol.64 No.3

ObjectiveTo determine the risk factors for occult endometrial atypia and malignancy in patients diagnosed with non-atypicalendometrial hyperplasia (NEH) on endometrial biopsy. MethodsAll new cases of NEH diagnosed between April 2015 and March 2016 at KK Women’s and Children’s Hospital, whounderwent hysterectomy as first-line treatment, were included in the study. Patients with a history of endometrialhyperplasia or malignancy were excluded from the study. Patient demographics (e.g., age, parity, body mass index[BMI]), medical history, and clinical presentation were obtained for analysis. ResultsIn total, 262 patients were diagnosed with NEH, of which 18.3% (n=48) underwent hysterectomy as first-linemanagement. The average time to surgery was 77.0±35.7 days. All cases were diagnosed by dilation and curettage,and hysteroscopy. The mean age was 51 years, and the mean BMI was 26.9±5.8 kg/m2. Histology from thehysterectomy specimen showed 9 (18.8%) patients with atypical hyperplasia and 2 (4.2%) with grade 1, stage 1Aendometrioid adenocarcinoma. Patients with higher grade final pathology had significantly lower median parity(1 vs. 2, P=0.039), higher mean BMI (30.1±6.5 vs. 25.9±5.3 kg/m2, P=0.033), and BMI ≥30 kg/m2 (54.5% vs. 13.5%,P=0.008, odds ratio 7.68), compared to patients whose final histology showed NEH or no residual hyperplasia. ConclusionOccult endometrial atypia and malignancy were found in 18.8% and 4.2% of patients with an initial diagnosis of NEH,respectively. High BMI and low parity were identified as significant risk factors for high-grade endometrial lesions inpatients with NEH.

Investigation of the High-energy Emission from the Magnetar-like Pulsar PSR J1119-6127 after the 2016 Outburst

Lin, Lupin Chun-Che,Wang, Hui-Hui,Li, Kwan-Lok,Takata, Jumpei,Hu, Chin-Ping,Ng, C.-Y.,Hui, C. Y.,Kong, A. K. H.,Tam, Pak-Hin T.,Yeung, Paul K. H. American Astronomical Society 2018 The Astrophysical journal Vol.866 No.1

Determinants of Consumer Participation in Online Group Buying:

Hui-Tzu Lin,Hyun-Jee Kim,Li-Wen Wang 한국무역연구원 2016 무역연구 Vol.12 No.4

Under the rise of network group-buying, consumers can form groups of strangers through the Internet, under the leadership of an coordinator, to integrate internal opinions and negotiate with vendors. Therefore, the coordinator gradually becomes a business. In this newly developed business, the coordinators compete with each other. In the past, most of research studies with regard to Internet group-buying focused on exploring the internet factors of consumer willingness or intention to repurchase. However, studies about applying the characteristics of an coordinator as a moderator to determine the impact of the repurchase intention were rare and thus, this is what this study set out to do. In this study, data was collected through an online questionnaire to examine the relationship between commodity eWOM, the features of the coordinator, online contexts and consumer repurchase intention. Empirical results show that: (1) eWOM has a significant impact on repurchase intention, (2) the features of the coordinator have a significant impact on repurchase intention, (3) online contexts have a significant impact on repurchase intention, (4) the features of coordinator have a negative moderate effect on eWOM and repurchase intention, and (5) online contexts do not have a moderating effect on eWOM and repurchase intention.

Involvement of Orai1 in tunicamycin-induced endothelial dysfunction

Hui Yang,Yumei Xue,Sujuan Kuang,Mengzhen Zhang,Jinghui Chen,Lin Liu,Zhixin Shan,Qiuxiong Lin,Xiaohong Li,Min Yang,Hui Zhou,Fang Rao,Chunyu Deng 대한약리학회 2019 The Korean Journal of Physiology & Pharmacology Vol.23 No.2

Endoplasmic reticulum (ER) stress is mediated by disturbance of Ca2+ homeostasis. The store-operated calcium (SOC) channel is the primary Ca2+ channel in non-excitable cells, but its participation in agent-induced ER stress is not clear. In this study, the effects of tunicamycin on Ca2+ influx in human umbilical vein endothelial cells (HUVECs) were observed with the fluorescent probe Fluo-4 AM. The effect of tunicamycin on the expression of the unfolded protein response (UPR)-related proteins BiP and CHOP was assayed by western blotting with or without inhibition of Orai1. Tunicamycin induced endothelial dysfunction by activating ER stress. Orai1 expression and the influx of extracellular Ca2+ in HUVECs were both upregulated during ER stress. The SOC channel inhibitor SKF96365 reversed tunicamycin-induced endothelial cell dysfunction by inhibiting ER stress. Regulation of tunicamycin-induced ER stress by Orai1 indicates that modification of Orai1 activity may have therapeutic value for conditions with ER stress-induced endothelial dysfunction.

Effects of an Anti-Smoking Program to Prevent Lung Cancer among Urban Aboriginals in Taiwan

Lin, Mei-Hsiang,Huang, Sheu-Jen,Shih, Whei-Mei Jean,Wang, Pao-Yu,Lin, Li-Hui,Hsu, Hsiu-Chin Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.11

Background and Purpose: Indigenous people who leave their hometowns and move to the city to earn a living became urban aboriginals. During the process of adapting to urban living situations, they may use various coping strategies such as smoking to overcome their stress. Therefore, it is crucial to provide health education including smoking prevention, increasing knowledge regarding of tobacco hazard, self-efficacy of anti-smoking, and adjusting smoking behavior so as to empower their anti-smoking motivation to prevent lung cancer. The purpose of this study was to explore the effectiveness of an anti-smoking program on urban aboriginals in Taiwan. Methods: A quasi-experimental study design with purposeful sampling was employed. A total of 125 aboriginal subjects were recruited from two local churches at Shu Lin area in northern Taiwan. Subjects were divided into an experimental group (n =64 ) and a control group (n = 61). Both took pre-tests in order to set baseline values, and only the experimental group participated for 3-weeks in the anti-smoking program classes. Both groups took post-tests immediately after the intervention in order to evaluate the immediate effects of the teaching program, and a follow-up test was conducted four weeks after the intervention. Data were analyzed using descriptive statistics, one-way ANCOVA, and repeat measure ANCOVA. Results: After controlling for confounding variables, the results showed that there were statistically significant differences in the self-efficacy of anti-smoking and smoking behavior between experimental and control groups in the immediately post-test and the follow-up test (p < 0.05). However, there was no significant differences in the recognition of hazards of smoking at eiter time point. Conclusions and Implications for Practice: The findings of this study revealed that the anti-smoking program effectively improved self-efficacy of anti-smoking, and decreased the smoking behavior in urban aboriginals. They provide useful information as a reference regarding of aboriginal health promotion to health providers. It is imperative that anti-smoking be reinforced for those regular smokers to prevent induction of lung cancer.

Inhibition of ERK and Activation of p38 are Involved in Diallyl Disulfide Induced Apoptosis of Leukemia HL-60 Cells

Hui Tan,Hui Ling,Jie He,Lan Yi,Jianguo Zhou,Min Lin,Qi Su 대한약학회 2008 Archives of Pharmacal Research Vol.31 No.6

We investigated the effects of diallyl disulfide (DADS) on the induction of apoptosis in human Leukemia cell line HL-60 and explored the roles of mitogen-activated protein kinase (ERK and p38 MAPK) pathways in the growth inhibition and apoptosis induced by DADS. MTT assay was used to determine the DADS induced cell growth inhibition in HL-60 cells. Flow cytometry and DNA fragmentation were used to examine the roles of apoptosis in DADS-mediated cell death. Western blot analysis of the expression of phospho-MAPKs (ERK and p38) was employed to elucidate the possible mechanisms of DADS induced apoptosis. We found that growth inhibition of HL-60 cells treated with DADS exhibited a dose-dependent response (P<0.05) and DADS induced significant apoptosis. DADS at the concentration of 10 mg/L persistently activated p38 and simultaneously reduced ERK activity. PD98059, an inhibitor of ERK upstream activators MAPK kinase MKK1 and MKK2, promoted cytotoxicity and apoptosis in HL-60 cells treated with DADS. In contrast, SB203580, an inhibitor of p38, decreased cytotoxicity and apoptosis induced by DADS. Therefore, DADS can effectively inhibit the proliferation and induce apoptosis of human leukemia cell line HL-60. Inhibition of ERK signaling pathways and activation of p38 signaling pathways are likely involved in DADS induced apoptosis in HL- 60 cells.

Correlations Between Fasciology and Yin Yang Doctrine

Hui Tao,Mei-chun Yu,Hui-ying Yang,Rong-mei Qu,Chun Yang,Xin Zhou,Yu Bai,Jing-peng Wu,Jun Wang,Ou Sha,Lin Yuan 사단법인약침학회 2011 Journal of Acupuncture & Meridian Studies Vol.4 No.2

The aim of this study is to explore the correlations between fasciology and yin yang doctrine. Professor Yuan developed fasciology by three-dimensional reconstruction of connective tissue (fascia) in the trunk and limbs of the human body and tracing back to tissue origins in light of biological evolution and developmental biology. Fasciology states that the human body can be divided into two systems: the supporting-storing system and the functional system. This article elaborates on the roles of the two systems and their mutual relationship. The two systems are used to analyze the yin,the yang, and their relationship. The two systems are promoted but also restricted in different contexts. The supporting-storing system is formed by undifferentiated connective tissue and provides undifferentiated cells and nutrients for differentiated cells of the functional system. Thus, the supporting-storing system could be classified as quiet, similar to yin. The functional system continuously maintains the various functional activities of the human body. Thus, the functional system could be classified as active, similar to yang. In interpreting the yin yang doctrine from the point of view of fasciology, yin can be compared with the supporting-storing system and yang can be compared with the functional system.