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Search Results: 1 - 10 of 126133 matches for " Yi-Fen Zhang "
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Factors predicting survival in patients with proximal gastric carcinoma involving the esophagus
Yi-Fen Zhang,Jiong Shi,Hui-Ping Yu,An-Ning Feng
World Journal of Gastroenterology , 2012, DOI: 10.3748/wjg.v18.i27.3602
Abstract: AIM: To investigate the clinicopathologic features which predict surgical overall survival in patients with proximal gastric carcinoma involving the esophagus (PGCE). METHODS: Electronic pathology database established in the Department of Pathology of the Nanjing Drum Tower Hospital was searched for consecutive resection cases of proximal gastric carcinoma over the period from May 2004 through July 2009. Each retrieved pathology report was reviewed and the cases with tumors crossing the gastroesophageal junction line were selected as PGCE. Each tumor was re-staged, following the guidelines on esophageal adenocarcinoma, according to the 7th edition of the American Joint Commission on Cancer Staging Manual. All histology slides were studied along with the pathology report for a retrospective analysis of 13 clinicopathologic features, i.e., age, gender, Helicobacter pylori (H. pylori) infection, surgical modality, Siewert type, tumor Bormann’s type, size, differentiation, histology type, surgical margin, lymphovascular and perineural invasion, and pathologic stage in relation to survival after surgical resection. Prognostic factors for overall survival were assessed with uni- and multi-variate analyses. RESULTS: Patients’ mean age was 65 years (range: 47-90 years). The male: female ratio was 3.3. The 1-, 3- and 5-year overall survival rates were 87%, 61% and 32%, respectively. By univariate analysis, age, male gender, H. pylori, tumor Bormann’s type, size, histology type, surgical modality, positive surgical margin, lymphovascular invasion, and pT stage were not predictive for overall survival; in contrast, perineural invasion (P = 0.003), poor differentiation (P = 0.0003), > 15 total lymph nodes retrieved (P = 0.008), positive lymph nodes (P = 0.001), and distant metastasis (P = 0.005) predicted poor post-operative overall survival. Celiac axis nodal metastasis was associated with significantly worse overall survival (P = 0.007). By multivariate analysis, ≥ 16 positive nodes (P = 0.018), lymph node ratio > 0.2 (P = 0.003), and overall pathologic stage (P = 0.002) were independent predictors for poor overall survival after resection. CONCLUSION: Patients with PGCE showed worse overall survival in elderly, high nodal burden and advanced pathologic stage. This cancer may be more accurately staged as gastric, than esophageal, cancer.
Synthesis and Application of Oil-Soluble Red Dyes Derived from p-n-Alkyl Aniline  [PDF]
Yi-Fen Chiang, Yu-Chou Chao
Materials Sciences and Applications (MSA) , 2014, DOI: 10.4236/msa.2014.58052
In this study, the azo red dyes derived from p-n-alkyl aniline by the introduction of different alkyl groups having high solubility in dodecane were synthesized. Results indicated that the elementary properties of red oil inks were 1) non-polarity; 2) low viscosity (<3.0 cps); 3) specified surface tension (<30 mN/m); 4) intensity of visible absorption covering 480 - 540 nm; 5) hue close to standard red (CIE(x, y) = 0.67, 0.33). We can conclude that these azo red dyes are applicable for electrowetting displays.
Antifungalmycin, an antifungal macrolide from Streptomyces padanus 702
Yi-Fen Wang,Sai-Jin Wei,Zhi-Ping Zhang,Tong-He Zhan,Guo-Quan Tu
Natural Products and Bioprospecting , 2012, DOI: 10.1007/s13659-011-0037-1
Abstract: Two polyene macrolide antibiotics: antifungalmycin (1) and fungichromin (2) were isolated from the culture mycelia of Streptomyces padanus 702 via bioactivity-guided fractionation using various chromatographic procedures. Their structures were elucidated on the basis of spectral analysis, and 1 is a new polyene macrolide. Compounds 1 and 2 showed significant inhibition against Gibberella zeae with EC50 values of 26.71 and 2.21 μg/mL, Fusicoccum sp. (plantain head blight) with EC50 values of 23.4 and 3.17 μg/mL, Mucor ssp. 8894 with EC50 values of 28.80 and 2.11 μg/mL, Ustilaginoidea virens with EC50 values of 26.72 and 0.21 μg/mL, respectively. This shows that the microbial secondary metabolites 1 and 2 have the potential to be developed as agricultural fungicides for use against G. zeae, Fusicoccum sp., Mucor ssp. 8894, and U. virens.
Effects of Phomopsis longanae Chi Infection on Lipoxygenase Activity and Fatty Acid Constituents of Membrane Lipids in Pericarp of Harvested Longan Fruits

CHEN Yi-hui,LIN He-tong,LIN Yi-fen,ZHAO Yun-feng,ZHANG Ju-nian,

热带亚热带植物学报 , 2011,
Abstract: 用拟茎点霉(Phomopsis longanae Chi)侵染福眼龙眼(Dimocarpus longan Lour. ‘Fuyan’)果实,研究龙眼果皮脂氧合酶(LOX)活性、膜脂脂肪酸组分和细胞膜透性的变化及其与果皮褐变的关系。结果表明:拟茎点霉侵染导致龙眼果皮褐变指数、LOX活性和细胞膜透性增加,不饱和脂肪酸组分亚油酸(C18∶2)、亚麻酸(C18∶3)和花生一烯酸(C20∶1)]下降而饱和脂肪酸组分棕榈酸(C16∶0)和硬脂酸(C18∶0)]增加,脂肪酸不饱和指数(IUFA)和脂肪酸不饱和度下降。拟茎点霉侵染提高龙眼果皮LOX活性和加速膜脂不饱和脂肪酸的降解,从而破坏细胞膜系统的完整性,导致膜系统区室化功能丧失,使多酚氧化酶与酚类物质接触,引起酚类物质的酶促氧化和黑褐色高聚物形成,导致龙眼果皮褐变。
Influence of pain location and hand dominance on scapular kinematics and EMG activities: an exploratory study
Yi-Fen Shih, Yi-Hsuan Kao
BMC Musculoskeletal Disorders , 2011, DOI: 10.1186/1471-2474-12-267
Abstract: Thirty subjects (10 males, 20 females; mean age (sd): 38 (11.9) years) with chronic neck pain for more than 3 months were recruited. The scapular kinematics and EMG activity of the upper trapezius and sternocleidomastoid muscles were measured during the bilateral arm elevation task. The three-way repeated measures ANOVA was used to examine the effect of neck pain location and hand dominance on the measurement of kinematics and EMG muscle activities.The movement of scapular posterior tilt was significantly influenced by arm dominance (P = 0.001) and by the interaction of arm dominance and elevation angle (P = 0.002). The movement of scapular upward/downward rotation was affected by the interaction of arm dominance and elevation angle (P = 0.02). The location of pain did not show any significant influence on the scapular movement and muscle activities.Hand dominance could have an influence on the scapular kinematics, which should be taken into consideration when describing and comparing neuromuscular characteristics in individuals with chronic neck pain.Measurement of three-dimensional kinematics and electromyography (EMG) activities is a common method to describe movement pattern and muscle performance in patients with chronic neck pain. Although most of the previous studies identified altered upper trunk postural control and muscle activation patterns during various testing tasks in subjects with chronic neck discomfort, none of these studies took into account the interaction of neck pain location and hand dominance on the neuromuscular performance in patients with chronic neck problems [1-5].In healthy subjects, the effect of hand dominance on the neuromuscular control characteristics was examined by several researchers. Findings of Freitas et al. (2009), Crosbie et al. (2008) and Matsuki et al. (2011) supported the influence of hand dominance on movement patterns of the upper extremity and shoulder complex during dynamic activities [6,7]. Crosbie et al. (2008) com


物理学报 , 1997,
Abstract: In this paper,we present the experimental observation of the deformed carbon nanotubes,using transmission electron microscopy (TEM).The deformations obsorred include both the radial deformation and the axial deformation. A proposed model can explain qualitatively the occurrence of the deformations of the carbon nanotube in a deposit by arc discharge between two proximate electrodes in argon atmosphere.
Hydrophobic Modification of Layered Clays and Compatibility for Epoxy Nanocomposites
Jiang-Jen Lin,Ying-Nan Chan,Yi-Fen Lan
Materials , 2010, DOI: 10.3390/ma3042588
Abstract: Recent studies on the intercalation and exfoliation of layered clays with polymeric intercalating agents involving poly(oxypropylene)-amines and the particular uses for epoxy nanocomposites are reviewed. For intercalation, counter-ionic exchange reactions of clays including cationic layered silicates and anionic Al-Mg layered double hydroxide (LDH) with polymeric organic ions afforded organoclays led to spatial interlayer expansion from 12 to 92 ? (X-ray diffraction) as well as hydrophobic property. The inorganic clays of layered structure could be modified by the poly(oxypropylene)amine-salts as the intercalating agents with molecular weights ranging from 230 to 5,000 g/mol. Furthermore, natural montmorillonite (MMT) clay could be exfoliated into thin layer silicate platelets ( ca. 1 nm thickness) in one step by using polymeric types of exfoliating agents. Different lateral dimensions of MMT, synthetic fluorinated Mica and LDH clays had been cured into epoxy nanocomposites. The hydrophobic amine-salt modification resulting in high spacing of layered or exfoliation of individual clay platelets is the most important factor for gaining significant improvements of properties. In particular, these modified clays were reported to gain significant improvements such as reduced coefficient of thermal expansion (CTE), enhanced thermal stability, and hardness. The utilization of these layered clays for initiating the epoxy self-polymerization was also reported to have a unique compatibility between clay and organic resin matrix. However, the matrix domain lacks of covalently bonded crosslink and leads to the isolation of powder material. It is generally concluded that the hydrophobic expansion of the clay inter-gallery spacing is the crucial step for enhancing the compatibility and the ultimate preparation of the advanced epoxy materials.
Lower extremity kinematics in children with and without flexible flatfoot: a comparative study
Yi-Fen Shih, Chao-Yin Chen, Wen-Yin Chen, Hsiu-Chen Lin
BMC Musculoskeletal Disorders , 2012, DOI: 10.1186/1471-2474-13-31
Abstract: Twenty children with flexible flatfeet (years age mean (SD), 9.7 (0.9) years) and 10 children with normal arches (yeas age mean (SD), 9.6 (1.2) years) were included. Kinematic data (maximum and minimum angles, and movement range, velocity, and excursion) of the hip, knee and rearfoot were collected during walking using Liberty Electromagnetic Tracking System. Kinematic variables were compared between the normal arches and flexible flatfeet groups using repeated measures mixed effects ANOVA.Movement patterns at the hip, knee and ankle joints were similar between children with flexible flatfeet and with normal arches. The results of ANOVA showed no significant main effect or interaction in any of the kinematic variables (P ≥ 0.05).This study identified no kinematic adaptation during walking in children with flexible flatfoot. We suggested that future research should take the influence of the mid-foot and forefoot into consideration when examining lower extremity kinematics in children with flexible flatfoot.Flexible flatfoot is a condition in which the medial longitudinal arch of the foot collapses during weight bearing and restores after removal of body weight [1,2]. Prevalence of flexible flatfoot in children, 2 to 6 years of age, has been reported at between 21% and 57%, and the percentage decreased to 13.4% and 27.6% in primary school children [3-5]. Generally, infants are born with flexible flatfoot [3]. The development of foot arch is rapid between 2 and 6 years of age [6], and becomes structurally matured around 12 or 13 years of age [7].Many individuals with flexible flatfeet walk with certain alterations in the lower extremity kinematics. The most common alteration is excessive pronation of the subtalar joint during stance phase [4,8-10]. In normal gait, the subtalar joint starts to pronate after initial contact until the metatarsal head contacts the ground, where upon the subtalar joint starts to supinate and converts the foot into a rigid structure for prop
Researches on Chemical Composition and Sources of Atmospheric Particles in Autumn of Beijing in 2004

PU Yi-Fen,WU Rui-Xia,

气候与环境研究 , 2006,
Abstract: In September 2004, atmospheric particle samples were collected by cascade at meteorological tower at the height of 8 m in Beijing city. The particle samples were analyzed using PIXE method, which resulted in 20 elemental concentrations and elemental distribution. From the observation, the element size distribution, enrichment factors and sources apportionment of particles are analyzed. The fine-mode distribution and high enrichment factors of fine aerosols of K indicated its main source of biomass burning. Factor analysis on the chemical composition of particles shows that sources of soil matters, biomass burning, coal combustion, industry dust and vehicle emission contributed to aerosols in autumn in Beijing.
Maw-Cherng Suen,Chun-Wei Yeh,Shui-Chuan Lin,Yi-Fen Hsu
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811027759
Abstract: In the title coordination polymer, [CdBr2(C12H12N2O2)]n, the CdII ion, situated on an inversion centre, is coordinated by four bridging Br atoms and two N atoms from two 1,4-bis(4,5-dihydro-1,3-oxazol-2-yl)benzene (L) ligands in a distorted octahedral geometry. The L ligand, which also lies across an inversion centre, bridges two CdII ions, forming layers parallel to (010).
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