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Printed thin film transistors with 10^(8)on/off ratios and photoelectrical synergistic characteristics using isoindigo-based polymers-enriched(9,8)carbon nanotubes

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Nano Research 2022年第6期15卷 5517-5526页

作者： Wenjing Xu Min Li Masayoshi Tange Liqiang Li juncai hou Jun Ye Li Wei Yuan Chen Jianwen Zhao School of Materials Science and Engineering Shaanxi University of TechnologyHanzhong 723001China Division of Nanodevices and Related Nanomaterials Printable Electronics Research CentreSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesNo.398 Ruoshui RoadSEIDSuzhou Industrial ParkSuzhou 215123China School of Nano Technology and Nano Bionics University of Science and Technology of ChinaHefei 230026China National and Local Joint Engineering Laboratory for Slag Comprehensive Utilization and Environmental Technology Shaanxi University of TechnologyHanzhong 723001China Nanomaterials Research Institute National Institute of Advanced Industrial Science and Technology(AIST)Tsukuba 3058565Japan Advanced Materials Division Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesNo.398 Ruoshui RoadSEIDSuzhou Industrial ParkSuzhou 215123China Institute of High Performance Computing Agency for ScienceTechnology and ResearchSingapore 138632Singapore School of Chemical and Biomolecular Engineering The University of SydneyCamperdownNSW 2006Australia

Monochiral single-walled carbon nanotubes(SWCNTs)can enable high-performance carbon-based electronic devices and integrated circuits.However,their fabrication often requires complex SWCNT purification and enrichment.Herein,we showed that isoindigo-based polymer derivatives(PDPPIID and PFIID)directly enriched(9,8)nanotubes from as-synthesized SWCNT powders selectively and efficiently to yield high concentration(9,8)nanotube inks.The selective wrapping mechanism was elucidated by classical full-atomistic molecular dynamic(MD)simulations.Thin-film transistors(TFTs)were fabricated by depositing the SWCNT ink into device channels using aerosol jet printing.TFT performance was strongly influenced by polymer residues,the deposition condition(humidity),and ink concentration.Optimized TFTs showed excellent device-to-device uniformity with 108 on/off ratios.Further,optoelectronic transistors were fabricated,and their photoelectrical neuromorphic characteristics,storage,memory,and logic functions were characterized under the pulsed light and voltage stimulations,demonstrating excellent application potentials.

关键词： monochiral carbon nanotube polymer wrapping printed thin-film transistor photoelectrical synergistic molecular dynamic simulation

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Screening beneficial bacteriostatic lactic acid bacteria in the intestine and studies of bacteriostatic substances

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2021年第7期22卷 533-547页

作者： Zhijing LIU Cong XU Ran TIAN Wan WANG Jiage MA Liya GU Fei LIU Zhanmei JIANG juncai hou Key Laboratory of Dairy Science Ministry of EducationCollege of Food ScienceNortheast Agricultural UniversityHarbin 150030China College of Food Science Northeast Agricultural UniversityHarbin 150030China

Lactic acid bacteria(LAB)are a representative probiotic.As the dominant flora in the human intestinal tract,LAB can regulate the balance of human intestinal flora and improve host health.The purpose of this study was to isolate and screen LAB that are well suited to the intestinal characteristics of the Chinese population,with excellent probiotics and high antibacterial activity.After 16S ribosomal RNA(rRNA)homology and phylogenetic tree analysis,potential probiotics were tested for their antibacterial activity,resistance to artificial gastrointestinal fluid and drugs,surface hydrophobicity,and safety.Three strains of LAB with acid resistance,bile salt resistance,epithelial cell adhesion,and no multidrug resistance were selected:Lactobacillus salivarius,Leuconostoc lactis,and Lactobacillus paracasei.Analysis of the antibacterial active substances in the three strains and their fermentation broths revealed that the main antibacterial substances of L.lactis were organic acids,whereas those of L.salivarius and L.paracasei were organic acids and bacteriocins with broad-spectrum antibacterial activity.These three strains of probiotic LAB with high antibacterial activity were identified as bacterial resources that could potentially be used to develop probiotic preparations for the prevention and treatment of intestinal diseases caused by intestinal pathogens.

关键词： Intestinal lactic acid bacteria Screening Probiotic Bacteriostatic substance

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后生元在肠道健康中的研究进展

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中国乳品工业 2024年第3期52卷 36-42页

作者：张雪薇杨涵侯俊财刘飞东北农业大学食品学院乳品科学教育部重点实验室哈尔滨150030 黑龙江省绿色食品科学研究院哈尔滨150028

后生元是指对宿主起有益作用的灭活菌或菌体成分。相对于益生菌来说,后生元既具有益生菌调节肠道健康的益生功能,同时又有良好的安全性、且成本相对低廉,是一种可替代益生菌安全有效的潜在肠道调节佐剂。本文对后生元的组成成分、对人... 详细信息

后生元是指对宿主起有益作用的灭活菌或菌体成分。相对于益生菌来说,后生元既具有益生菌调节肠道健康的益生功能,同时又有良好的安全性、且成本相对低廉,是一种可替代益生菌安全有效的潜在肠道调节佐剂。本文对后生元的组成成分、对人体健康的益生作用及其在肠道健康方面的应用研究现状进行了阐述,对后生元改善儿童轮状病毒肠炎、炎症性肠病、肠应激综合征、结直肠癌以及新型冠状病毒肺炎患者的肠道健康等相关研究进行了归纳总结,以期为其通过肠-肺轴,肠-脑轴等多器官轴的生物活性作用在预防相关疾病方面的实际应用提供参考。

关键词：益生菌后生元生物活性益生作用肠道健康

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Combination of microwave heating and transglutaminase cross-linking enhances the stability of limonene emulsion carried by whey protein isolate

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Food Bioscience 2022年第3期47卷 707-715页

作者： Akhunzada Bilawal Xindi Wang Kwang-Chol Oh Abdul Qayum Munkh-Amgalan Gantumur Zhanmei Jiang juncai hou Key Laboratory of Dairy Science (Northeast Agriculture University) Ministry of EducationCollege of Food ScienceHarbin150030PR China Pyongyang Technology College of Food and Commodity Democratic People's Republic of Korea

In this study,we examined the effect of transglutaminase(TG)cross-linking time(0 h,2 h,4 h,8 h,and 12 h)on the stability of limonene emulsion loaded by microwave-heated WPI(MWPI).Size exclusion chromatography results showed that molecular weight of TG-treated MWPI and WPI was enhanced with the increase in TG cross-linking time(0–12 h).Microwave and TG cross-linking decreased particle size(7.55%)and increasedζ-potential(5.33%)and protein adsorption(4.58%)of WPI emulsion at TG cross-linking time of 12 h.CLSM results showed smaller droplet size of MWPI-TG emulsion and its uniform size.The obtained limonene emulsion loaded by MWPI-TG at 12 h showed the lowest creaming index and the strongest oxidative stability under aerobic conditions after 10th days of storage.Thus,the combination of microwave heating and TG cross-linking effectively enhanced the stability of limonene emulsion stabilized by WPI and facilitating the application of WPI in the fields of food,medicine,cosmetics,and other areas.

关键词： Microwave Whey protein isolates D-limonene Emulsion Stability

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LuxS/AI-2群体感应系统对植物乳杆菌抵御环境胁迫的作用

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食品科学技术学报 2024年第1期42卷 106-113页

作者：马佳歌谭中美田子豪吴梦果韦旋任洁姜瞻梅于微侯俊财东北农业大学食品学院/乳品科学教育部重点实验室黑龙江哈尔滨150030

LuxS/AI-2群体感应系统可介导乳酸菌种内和种间信号,其中自诱导因子-2(autoinducer-2,AI-2)对乳酸菌的益生菌活性(环境胁迫耐受、黏附和定植能力等)至关重要。然而,目前对于LuxS/AI-2群体感应系统在植物乳杆菌抵御多种环境胁迫中的调控... 详细信息

LuxS/AI-2群体感应系统可介导乳酸菌种内和种间信号,其中自诱导因子-2(autoinducer-2,AI-2)对乳酸菌的益生菌活性(环境胁迫耐受、黏附和定植能力等)至关重要。然而,目前对于LuxS/AI-2群体感应系统在植物乳杆菌抵御多种环境胁迫中的调控作用仍有待系统研究。通过群体感应信号分子研究及实时荧光定量聚合酶链式反应,分析了环境胁迫下植物乳杆菌KLDS 1.0328信号分子AI-2产量及群体感应关键基因luxS和pfs的转录情况。结果表明:酸胁迫可诱导信号分子AI-2的产生,强酸及强碱胁迫下可显著促进luxS及pfs的转录(P<0.05)。低温25℃、高温50℃、质量分数6.0%NaCl及质量分数3.0%NaCl+3.0%KCl诱导的高渗透压胁迫均会显著抑制菌体的增殖和代谢产酸,并抑制信号分子AI-2的产生;25℃低温胁迫会上调luxS及pfs基因的转录。随着高渗胁迫程度的增强,luxS及pfs基因的转录水平均逐步上调。营养胁迫诱导植物乳杆菌KLDS 1.0328产生更多的信号分子AI-2;随营养胁迫程度的加剧,luxS的转录水平显著上调,在营养物质体积分数为20%时,luxS及pfs基因的转录均达到最高水平,而pfs基因的转录在营养物质被稀释至体积分数为40%~60%时被显著抑制(P<0.05)。研究结果表明,多种环境胁迫下LuxS/AI-2群体感应系统具有不同的变化规律,且在植物乳杆菌KLDS 1.0328的抗逆过程中发挥重要作用。

关键词：植物乳杆菌环境胁迫应激反应群体感应自诱导因子-2

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小麦肽-维生素D微胶囊的稳定性及结构鉴定

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食品科技 2024年第5期49卷 258-265,274页

作者：刘睿王华蕾吴晗硕任杰许润琦刘文颖侯俊财东北农业大学黑龙江哈尔滨150000 中国食品发酵工业研究院有限公司北京市蛋白功能肽工程技术研究中心北京100015

以小麦肽为壁材,维生素D(Vitamin D,VD)油作为芯材,利用喷雾干燥法制备小麦肽-VD微胶囊,并对其稳定性进行了初步研究。通过分析微胶囊的基础理化成分,以分子质量分布为指标,研究了pH值、温度和蛋白酶消化对微胶囊稳定性的影响。结果表明... 详细信息

以小麦肽为壁材,维生素D(Vitamin D,VD)油作为芯材,利用喷雾干燥法制备小麦肽-VD微胶囊,并对其稳定性进行了初步研究。通过分析微胶囊的基础理化成分,以分子质量分布为指标,研究了pH值、温度和蛋白酶消化对微胶囊稳定性的影响。结果表明,微胶囊中共含有17种氨基酸,必需氨基酸占比为15.8%,相对分子质量小于2000 u的水解物占比为97.79%;总蛋白质含量为74.78%,酸溶蛋白含量为71.65%。在pH值分别为2、4、6、8、10、37 ℃水浴2 h后,微胶囊各分子质量区间的比例变化不超过6%;分别于20、40、60、80 ℃和100 ℃下水浴2 h后,微胶囊各分子质量区间的比例变化不超过7%;分别经过胃蛋白酶、胰蛋白酶、胃蛋白酶及胰蛋白酶消化后,微胶囊各分子质量区间的比例变化不超过6%。该研究为小麦肽-VD微胶囊在食品工业中的应用提供了理论依据,同时也提供了保护VD活性和延长货架期的可行方法。

关键词：小麦肽维生素D 螯合稳定性

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激光功率对3/4H SUS301和SUS316异种不锈钢激光点焊成形特征及组织性能的影响

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焊管 2024年第5期47卷 33-39页

作者：董智龙彭丽雯侯军才张秋美张会陕西理工大学材料科学与工程学院陕西汉中723001

采用准连续激光器对测力传感器的3/4H SUS301弹性体和SUS316支撑体进行异种不锈钢激光焊接,探讨了激光功率对点焊接头成形特征和力学性能的影响。研究表明,采用准连续激光模式,在脉冲时间为2 ms、激光功率为180 W至270 W范围内,弹性体... 详细信息

采用准连续激光器对测力传感器的3/4H SUS301弹性体和SUS316支撑体进行异种不锈钢激光焊接,探讨了激光功率对点焊接头成形特征和力学性能的影响。研究表明,采用准连续激光模式,在脉冲时间为2 ms、激光功率为180 W至270 W范围内,弹性体焊后的角变形量随着激光功率的增大而增大,激光功率为270 W时弹性体焊后的角变形远低于传感器容许的变形量。当激光功率为210W时,在焊接界面处产生气孔缺陷,焊接功率增大至270 W时,在匙孔底部形成严重的气孔缺陷。焊缝内部以胞状晶方式生长,从熔合区两侧向焊缝中心生长为粗大的柱状晶,焊缝中心为等轴状的树枝晶,随着激光功率的增大,等轴晶区域的宽度减小。焊缝区承受较高的焊接热量使得焊缝区内形变组织发生不完全再结晶,致使形变诱发马氏体相变被抑制,α'马氏体含量降低。点焊接头的剪切力随着激光功率先增大后减小,当激光功率为250 W时,接头的剪切力达到最大值0.49 kN,远高于行业要求。

关键词：激光焊接点焊晶粒形态气孔缺陷显微组织

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Application of modified quartz crystal sensors:Detection of isobutyl alcohol,ethyl acetate and ethylene

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International Journal of Agricultural and Biological Engineering 2014年第5期7卷 71-77页

作者： hou juncai Hu Yaohua Guo Kangquan College of Mechanical and Electronic Engineering Northwest A&F UniversityYangling 712100China

Aroma volatilization is one of the very important attributes of agricultural products during ripening.Ingredients of aroma compounds experience changes over products’different ripening stages.This paper aimed to develop a detection system based on modified quartz crystal sensors to detect volatile organic compounds(VOCs).By drop-coating on sensors’surface,four sensors were made using quartz crystal resonators coated with four different absorbable materials:ethyl cellulose,cellulose acetate,1,2-dioleoyl-sn-glycero-3-[phosphor-L-serine],and galactosyl ceramide.With the diversely coated sensors,three VOCs:isobutyl alcohol,ethyl acetate and ethylene were detected at ppm level.To investigate the structure influence of the coated sensing films on VOCs absorption,the topography of films was imaged in 3D using atomic force microscopy(AFM)in tap mode for qualitative analysis of gas absorption.The selectivity and sensitivity were investigated when sensors were exposed to VOCs with increasing concentrations.The results showed that the frequency shift of sensors was linear to the concentrations of all three VOCs in the range of 5-25 ppm.With values reaching over 4.5 Hz/ppm,the sensitivity of cellulose acetate coated sensor to three VOCs was similar,higher than that of sensors with other coatings.The high sensitivity of the cellulose acetate coated sensor might be due to the film’s rough surface and porous structure.The results may help further research on detection of fruits’organic volatiles during the ripening stage.

关键词： quartz crystal sensor atomic force microscopy detection selectivity sensitivity volatile organic compounds

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结合鼻窦CT评分联合血清变应原sIgE构建嗜酸粒细胞型CRSwNP患者术后复发的风险模型

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临床耳鼻咽喉头颈外科杂志 2022年第1期36卷 19-24页

作者：侯军才漯河市中心医院耳鼻咽喉科河南漯河462000

目的:探讨鼻窦CT评分联合血清变应原sIgE构建嗜酸粒细胞(EOS)型慢性鼻窦炎伴鼻息肉(CRSwNP)患者术后复发的风险模型。方法:收集2016年1月—2019年1月在漯河市中心医院接受治疗的183例EOS型CRSwNP患者的临床资料,术后1年评估疗效,根据术... 详细信息

目的:探讨鼻窦CT评分联合血清变应原sIgE构建嗜酸粒细胞(EOS)型慢性鼻窦炎伴鼻息肉(CRSwNP)患者术后复发的风险模型。方法:收集2016年1月—2019年1月在漯河市中心医院接受治疗的183例EOS型CRSwNP患者的临床资料,术后1年评估疗效,根据术后复发情况分为复发组和未复发组。单因素分析临床和病理因素对患者术后的疗效,XGboost模型及多因素Cox分析术后复发的影响因素。绘制两种模型的受试者工作特征(ROC)曲线比较两种模型的预测效果。Kaplan-Meier法绘制生存曲线,比较不同危险级别患者的存活率。结果:Cox多因素分析结果显示术后未坚持综合治疗、组织EOS比例、组织中性粒细胞(NEU)比例、组织淋巴细胞比例、组织浆细胞比例、外周血NEU比例、变应原sIgE、鼻窦CT总评分是影响患者复发的独立危险因素。XGboost模型排名前六的术后复发的影响因素为变应原sIgE、鼻窦CT总评分、组织EOS比例、术后未坚持综合治疗、组织淋巴细胞比例、组织浆细胞比例。ROC曲线显示,XGboost模型的ROC曲线下面积为0.818,较多因素Cox分析(0.789)增加了3.68%,且模型灵敏度、特异度和约登指数明显高于多因素Cox分析模型。将纳入XGboost模型的因素构建术后复发风险模型,高危组存活率显著低于低危组和中危组(log-rank检验值:21.946,P<0.001)。结论:鼻窦CT评分联合血清变应原sIgE建立的术后复发风险模型可有效预测患者的术后复发率,XGboost模型对EOS型CRSwNP患者术后复发的预测效果优于多因素Cox分析模型,可应用于术后复发的预测。

关键词：鼻息肉鼻窦炎复发 XGboost模型

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Classification of ripening stages of bananas based on support vector machine

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International Journal of Agricultural and Biological Engineering 2015年第6期8卷 99-103页

作者： hou juncai Hu Yaohua hou Lixia Guo Kangquan Takaaki Satake College of Mechanical and Electric Engineering Northwest A&F UniversityYangling 712100China Graduate School of Life and Environmental Sciences University of Tsukuba1-1-1TennodaiTsukuba 305-8702Japan

Non-destructive quality detection and automatic grading are important in fruit industry.The traditional way divides bananas into 7-level ripening stages based on color.This study investigated the changes of peel color at three positions of banana fingers,i.***.stalk,middle and tip.A support vector machine method was used to classify the ripening stages by color value L*,a*and b*as input data.The ripening stages were classified by 10-fold cross validation method of support vector machines with radial basis function kernel and linear function kernel.The results showed that the color change of middle position of banana finger adequately reflected the changes in banana ripening stages.a*value continuously increased from ripening stage 1 to ripening stage 7,L*and b*values increased from ripening stage 1 to ripening stage 5,and then decreased from ripening stage 5 to ripening stage 7.It was difficult to recognize the ripening stages using L*,a*and b*values individually.The accuracy of classification using support vector machine based on radial basis function kernel reached 96.5%,which was higher than that for linear function kernel.This research can provide a reference for automatic classification of banana ripening stages.

关键词： banana ripening stage color change support vector machine classification image recognition

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