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Xiayun Zhang,Ting-Ting Li,Ting-Ting Li,Hao-Kai Peng,Zhike Wang,Jia-Horng Lin,Ching-Wen Lou 한국섬유공학회 2022 Fibers and polymers Vol.23 No.8
This paper fabricated two types stab-resistant nonwoven fabric and the stab/puncture resistance of nonwoven werestudied. Nylon fibers, Kevlar fibers, and two types of low-melting point fibers-low-melting point polyester (LPET) fibers andpolypropylene(PP) fibers-are made into PP/nylon/Kevlar and LPET/nylon/Kevlar nonwoven fabrics. Needle punching andthermal bonding technology are used to made stab-resistant nonwoven fabric, thereby examining the influence of lowmeltingpoint fibers content (i.e. LPET or PP fibers) and bonding mode with other fibers on the stab/puncture resistanceproperty of nonwoven fabrics. The quasi-static stab resistance and bursting properties were compared between nonwovenfabrics and nonwoven fabric of PET filament reinforced nonwovens. The test results show that PET filament reinforcementhas a positive influence on the mechanical properties of composite nonwoven fabrics, especially puncture/stab resistanceperformance.
Xiayun Zhang,Ting-Ting Li,Hao-Kai Peng,Zhike Wang,Junli Huo,Ching-Wen Lou,Jia-Horng Lin 한국섬유공학회 2020 Fibers and polymers Vol.21 No.7
This study explores the influences of needle punching and a shear-thickening fluid (STF) on the stab resistancesandwich-structured composites made of nylon nonwoven and aramid fabrics. Needle punching and different treatments ofaramid fabric are conducted to obtain the composites. The effects of needle punching and different treatments of aramidfabrics on the sandwich-structured composites were examined using quasi-static puncture resistance, quasi-static stabresistance, dynamic puncture resistance, and bursting property tests. Results show that needle punching and incorporation ofSTF positively influence the stab resistance of the composites. This study provides an innovative method to reduce thenumber of lamination layers and decrease the weight.
Yunyan Zhang,Dan Ou,Yajia Gu,Xiayun He,Weijun Peng 대한영상의학회 2018 Korean Journal of Radiology Vol.19 No.4
Objective: To investigate the value of diffusion-weighted magnetic resonance imaging (DW-MRI) as a noninvasive tool to assess salivary gland function for follow-up of patients with radiation-induced xerostomia. Materials and Methods: This study included 23 patients with nasopharyngeal carcinoma who had been treated with parotidsparing radiotherapy (RT). Salivary function was assessed by DW-MRI pre-treatment and one week and one year post-RT, respectively. The maximum apparent diffusion coefficient (ADC) of parotid glands (pADCmax) and the time to peak ADC of parotid glands (pTmax) during stimulation were obtained. Multivariate analysis was used to analyze factors correlated with the severity of radiation-induced xerostomia. Results: The ADCs of parotid and submandibular glands (1.26 ± 0.10 x 10-3 mm2/s and 1.32 ± 0.07 x 10-3 mm2/s pre-RT, respectively) both showed an increase in all patients at one week post-RT (1.75 ± 0.16 x 10-3 mm2/s, p < 0.001 and 1.70 ± 0.16 x 10-3 mm2/s, p < 0.001, respectively), followed by a decrease in parotid glands at one year post-RT(1.57 ± 0.15 x 10-3 mm2/s, p < 0.001) but not in submandibular glands (1.69 ± 0.18 x 10-3 mm2/s, p = 0.581). An improvement in xerostomia was found in 13 patients at one year post-RT. Multivariate analysis revealed 4 significant predictors for the improvement of xerostomia, including dose to parotid glands (p = 0.009, odds ratio [OR] = 0.639), the ADC of submandibular glands (p = 0.013, OR = 3.295), pADCmax (p = 0.024, OR = 0.474), and pTmax (p = 0.017, OR = 0.729) at one week post-RT. Conclusion: The ADC value is a sensitive indicator for salivary gland dysfunction. DW-MRI is potentially useful for noninvasively predicting the severity of radiation-induced xerostomia.
Autism-like Behaviors in Male Juvenile Offspring after Maternal Glyphosate Exposure
Yaoyu Pu,Li Ma,Jiajing Shan,Xiayun Wan,BruceD.Hammock,Kenji Hashimoto 대한정신약물학회 2021 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.19 No.3
Objective: Exposure to the herbicide glyphosate during pregnancy and lactation may increase the risk for autism spectrum disorder (ASD) in offspring. Recently, we reported that maternal exposure of formulated glyphosate caused ASD-like behaviors in juvenile offspring. Here, we investigated whether maternal exposure of pure glyphosate could cause ASD-like behaviors in juvenile offspring. Methods: Water or 0.098% glyphosate was administered as drinking water from E5 to P21 (weaning). Behavioral tests such as grooming test and three-chamber social interaction test in male offspring were performed from P28 to P35. Results: Male offspring showed ASD-like behavioral abnormalities (i.e., increasing grooming behavior and social interaction deficit) after maternal exposure of glyphosate. Conclusion: The findings suggest that the exposure of glyphosate during pregnancy and lactation may cause ASD-like behavioral abnormalities in male juvenile offspring. It is likely that glyphosate itself, but not the other ingredients, may contribute to ASD-like behavioral abnormalities in juvenile offspring.
Ting-Ting Li,Wenna Dai,Liwei Wu,Hao-Kai Peng,Xiayun Zhang,Bing-Chiuan Shiu,Jia-Horng Lin,Ching-Wen Lou 한국섬유공학회 2019 Fibers and polymers Vol.20 No.2
In order to deeply explore the fiber characteristics influencing on stab resistance of shear thickening fluid (STF)-impregnated fabrics, two different weaving fabrics, ultra-high molecular weight polyethylene (UHMWPE) fabric and Kevlar fabrics are saturate the various concentrations and particle size of STFs. Result shows that, SiO2/PEG-200 blends demonstrate quick shear-thickening property, and the critical shear rate lowers to 1.2-45 s-1 with higher concentration of 75 nm SiO2. STF concentration and particle size significantly affect spike puncture resistance property, but the knife stab resistance mainly depends on fiber characteristics. Comparatively, STF-UHMWPE composite fabrics exhibit better knife stab resistance but weaker spike puncture resistance than STF-Kevlar fabrics. This study can provide an optimization for structure design of stab resistance armors in the future.