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Alkali-enzymatic treatment of Bambusa blumeana textile fibers for natural fiber-based textile material production

Industrial Crops and Products 2023年第1期194卷

作者： Lobregas, Michaela Olisha S. Buniao, Emmanuel Victor D. Leaño, Julius L. Research and Development Division Philippine Textile Research Institute Department of Science and Technology Bicutan Taguig City1631 Philippines Career Incentive Program Science Education Institute Department of Science and Technology Bicutan Taguig City1631 Philippines

Bamboo is a promising natural fiber source for developing sustainable and green textile materials. Different fiber treatment techniques have been explored to produce natural bamboo textile fibers (BTF) with enhanced physical and chemical characteristics suitable for yarn processing and fabric weaving. This study presents a facile, low-cost, and environmentally friendly technique of transforming natural bamboo raw fiber into a yarn-spinnable BTF that can be developed into an all-natural fiber-based blended yarn. The combined alkali and multi-enzyme treatment of natural BTF resulted in a notable enhancement in the linear density, tenacity, and elongation by 106%, 30%, and 13%, respectively. The improvement in the physical properties of the fibers is highly correlated to the reduction in the non-cellulosic components such as lignin, residual gum, fats, and waxes by 29%, 56%, and 72%, respectively, which also led to an increase in surface roughness and crystallinity of the fibers. The alkali-enzymatic treated bamboo textile fiber underwent a further mechanically intensive process to attain nearly similar dimensions with cotton fibers that serve as its carrier fiber to produce natural fiber-blended yarns containing both the excellent properties of cotton and bamboo. Thin and thick cotton-bamboo blended yarns ranging from 60 tex to 120 tex were prepared and shown to have comparable characteristics such as tenacity and elongation, which are applicable in the weaving of medium-weight and heavyweight fabrics. The alkali-enzymatic fiber treatment of BTF strongly shows its viable potential in manufacturing green and environmental-friendly natural bamboo textile materials. © 2023 Elsevier B.V.

关键词： Bamboo

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US Army Aviation air movement operations assignment, utilization and routing

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Journal of Defense Analytics and Logistics 2023年第1期7卷 2-28页

作者： Nelson, Russell King, Russell McConnell, Brandon M. Thoney-Barletta, Kristin Operations Research Graduate Program North Carolina State University Raleigh NC United States Department of Industrial and Systems Engineering North Carolina State University Raleigh NC United States Center for Additive Manufacturing and Logistics North Carolina State University Raleigh NC United States Department of Textile and Apparel Technology and Management North Carolina State University at Raleigh Raleigh NC United States

Purpose: The purpose of this study was to create an air movement operations planning model to rapidly generate air mission request (AMR) assignment and routing courses of action (COA) in order to minimize unsupported AMRs, aircraft utilization and routing cost. Design/methodology/approach: In this paper, the US Army Aviation air movement operations planning problem is modeled as a mixed integer linear program (MILP) as an extension of the dial-a-ride problem (DARP). The paper also introduces a heuristic as an extension of a single-vehicle DARP demand insertion algorithm to generate feasible solutions in a tactically useful time period. Findings: The MILP model generates optimal solutions for small problems (low numbers of AMRs and small helicopter fleets). The heuristic generates near-optimal feasible solutions for problems of various sizes (up to 100 AMRs and 10 helicopter team fleet size) in near real time. Research limitations/implications: Due to the inability of the MILP to produce optimal solutions for mid- and large-sized problems, this research is limited in commenting on the heuristic solution quality beyond the numerical experimentation. Additionally, the authors make several simplifying assumptions to generalize the average performance and capabilities of aircraft throughout a flight. Originality/value: This research is the first to solve the US Army Aviation air movement operations planning problem via a single formulation that incorporates multiple refuel nodes, minimization of unsupported demand by priority level, demand time windows, aircraft team utilization penalties, aircraft team time windows and maximum duration and passenger ride time limits. © 2022, In accordance with section 105 of the US Copyright Act, this work has been produced by a US government employee and shall be considered a public domain work, as copyright protection is not available.

关键词： Aircraft Demand priority Dial-a-ride problem Helicopter routing Heuristic Military aviation Multiple refuel nodes Vehicle utilization

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3D printing of silk fibroin-based hybrid scaffold treated with platelet rich plasma for bone tissue engineering

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Bioactive Materials 2019年第1期4卷 256-260页

作者： Liang Wei Shaohua Wu Mitchell Kuss Xiping Jiang Runjun Sun Reid Patrick Xiaohong Qin Duan Bin School of Textile Science and Engineering Xi'an Polytechnic UniversityXi'an710048PR China Mary&Dick Holland Regenerative Medicine Program Division of CardiologyDepartment of Internal MedicineUniversity of Nebraska Medical CenterOmahaNE68198USA Key Laboratory of Textile Science&Technology Ministry of EducationCollege of TextilesDonghua UniversityShanghai201620PR China College of Textiles&Clothing Qingdao UniversityQingdao266071PR China Department of Pathology&Microbiology College of MedicineUniversity of Nebraska Medical CenterOmahaNE68198USA Department of Surgery College of MedicineUniversity of Nebraska Medical CenterOmahaNE68198USA Department of Mechanical and Materials Engineering University of Nebraska-LincolnLincolnNE68516USA

3D printing/bioprinting are promising techniques to fabricate scaffolds with well controlled and patient-specific structures and architectures for bone tissue *** this study,we developed a composite bioink consisting of silk fibroin(SF),gelatin(GEL),hyaluronic acid(HA),and tricalcium phosphate(TCP)and 3D bioprinted the silk fibroin-based hybrid *** 3D bioprinted scaffolds with dual crosslinking were further treated with human platelet-rich plasma(PRP)to generate PRP coated ***/Dead and MTT assays demonstrated that PRP treatment could obviously promote the cell growth and proliferation of human adipose derived mesenchymal stem cells(HADMSC).In addition,the treatment of PRP did not significantly affect alkaline phosphatase(ALP)activity and expression,but significantly upregulated the gene expression levels of late osteogenic *** study demonstrated that the 3D printing of silk fibroin-based hybrid scaffolds,in combination with PRP post-treatment,might be a more efficient strategy to promote osteogenic differentiation of adult stem cells and has significant potential to be used for bone tissue engineering.

关键词： 3D bioprinting Hybrid scaffold Coating Growth factor cocktail Tissue engineering

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Assessment of the Total Organic Carbon and Conductivity in Consecutive Dyeings with Reactive Dyestuffs Using Treated Effluent by UV/H202 Photocatalysis

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Journal of Chemistry and Chemical Engineering 2014年第2期8卷 139-144页

作者： Leite Adilson da SilvaI Barco Luiz Trindade Nelson Barros Araujo Mauricio de Campos Rosa Jorge Marcos Tambourgi Elias Basile Santana José Carlos Curvelo Chemical Textile Post Graduation Department College of Technology SENAI Antoine Skaf $6o Paulo 03008-020 Brazil Textile and Fashion Post Graduation Program S6o Paulo University S6o Paulo 03828-000 Brazil College of Chemical Engineering State University of Campinas Campinas 13083-852 Brazil Production Engineering Post Graduation Program Nove de Julho University Sao Paulo 05001-100 Brazil

The paper was monitored the conductivity （g.L＂l of NaCI）, the absorbances values （Abs） and the amount of TOC （total organic carbon）, before and after five consecutive dyeings made with reuse water, obtained from treated effluent by UV/H202 photocatalysis. All rates of decolorization were above 92%, the removal of total organic carbon was above 89% in all treatments and the economy of NaCI was from 3.10 in the first recipe, 3.17 in the second, 3.49 in the third, 3.79 in the fourth and 4.05 in the fifth recipe. The five dyeings compared with same dyeings made with deionized water presented a color deviation （AE＊） below 1. The conventional dyeings would consume 80 L/kg against 40 L/kg used in the dyeing process proposed in this study, representing a great economy of water, with no discharge of effluents.

关键词： Conductivity reactive dyestuffs reuse of water photocatalysis textile effluent.

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The Solid-State Reaction Facilitated by a Microwave-Assisted Method for Lithium Vanadium Silicon Oxide Synthesis by Incorporating Pure Silica and Rice Husk Ash for the Application as Anode Material in Lithium-Ion Battery

SSRN

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SSRN 2022年

作者： Kumchompoo, Jaturon Kunthadee, Phetlada Laorodphan, Nattapol Kidkhunthod, Pinit Kuimalee, Surasak Tangkuaram, Tanin Puntharod, Ratchadaporn National Sun Yat-sen University Taiwan Program in Applied Chemistry Faculty of Science Maejo University Chiang Mai50290 Thailand Program in Industrial Chemistry and Textile Technology Faculty of Science Maejo University Chiang Mai50290 Thailand Nakhon Ratchasima30000 Thailand

A solid-state reaction: heated by the microwave-assisted method was used for the synthesis of Li3.6Si0.6V0.4O4 using LiNO3, V2O4, and (pure silica/silica from rice husk ash). In this work, the influence of the source of silica, and microwave heating time was studied on the electrochemical properties formation of the product. and electrochemical properties were measured by cyclic voltammetry. The substances were ground and heated with a microwave oven at 400 and 600 W for 5 min. Among the compound prepared from both pure silica and silica from rice husk ash with 600 W microwave heating provided the highest specific capacitance for both silica source supercapacitors at 444-616 F.g-1 at the rate of scanning 5 mV.s-1. Furthermore, the product from both silica heated with 600W of microwave show a retention capacity of 88.8% after 300 cycles at a charge-discharge rate in the range of 0.1-5 C between 1 and 2.5 V. The result shows the specific capacity was 221 mAh.g-1, at 1 C discharge rate. To identify the empirical formula of the compound, X-ray diffraction and transmission electron microscopy were employed which suggested that the empirical formula was Li3.6Si0.6V0.4O4. The Fourier transform infrared and resonance Raman spectroscopy exhibited the bonds of Si‒O, Li‒O, V=O, and Si‒O‒Si. The oxidation states of V for Li3.6Si0.6V0.4O4 and Li3VO4 in the products were verified to be V4+ and V5+ by X-Ray absorption near the edge structure. Scanning electron microscopy was employed for the porosity and crystal size of the product from rice husk ash precursor has a higher porosity and small crystal size than pure SiO2 precursor. These results suggested the Li3.6Si0.6V0.4O4 would be potential an anode in the lithium-ion battery. © 2022, The Authors. All rights reserved.

关键词： Lithium compounds

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Ecological Costs Applied in the Bleaching of Cotton： A Study for an Optimized Process

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Journal of Chemistry and Chemical Engineering 2013年第7期7卷 633-636页

作者： Rosa Jorge Marcos Tambourgi Elias Basile Santana Jose Carlo Curvelo Carmo Renee Simoes Argolo Arafjo Mauricio de Campos College of Chemistry Engineering State University of Campinas Sao Paulo 03008-020 Brazil Post Graduation Department College of Technology Antoine Skaf Sao Paulo 03008-202 Brazil Production Engineering Post Graduation Program Nine o f July University Sao Paulo 5001-100 Brazil Textile and Fashion Post Graduation Program Sao Paulo University S6o Paulo 03828-000 Brazil

The aim of this paper was to study three variables in hydrogen peroxide bleaching of cotton fabrics： the amount of hydrogen peroxide （H2O2）, peroxide stabilizer （Na2SiO3） and the process temperature. The factorial planning of two levels and three factors was done in order to obtain an optimized recipe for subsequent comparison with commons recipes used in industry. Were evaluated the brightness （DL）, energy consumption （dQ）, H2O2 residual （Rox）, processing time and ecological costs.

关键词： Cotton bleaching factorial planning ecological costs.

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Design and properties of blended sandwich non-drip PA6/Lenzing Fr®/Pbi fiber nonwoven fabrics

Design and properties of blended sandwich non-drip PA6/Lenzi...

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SAMPE Seattle 2017 Conference

作者： Yao, Lan Wu, Hao Capelli, Lucas Koo, Joseph. H. Krifa, Mourad Donghua University Department of High-Tech Textiles College of Textiles No. 2999 North Renmin Road Shanghai201620 China Dept. of Mechanical Engineering University of Texas at Austin 204 E. Dean Keeton-C2200 AustinTX78712 United States Materials Science and Engineering Program University of Texas at Austin AustinTX78712 United States School of Human Ecology-Textile and Apparel Technology University of Texas at Austin A270 AustinTX78712 United States

In the current thermal protective clothing systems, maximizing the personal protection performance against fire and heat is in great demand. Additionally, minimizing the manufacturing cost by using low-cost materials is also a critical factor. In the previous study, a new type of low-cost flame resistant (FR) non-drip Polyamide 6 (PA6) fiber was developed. In this paper, this FR non-drip PA6 fiber was tested in blends with two inherently FR fibers to form FR nonwoven fabrics. Different formulations of varying blending ratios of these three fibers were processed into nonwoven fabrics. The vertical flame resistance and the thermal properties were characterized. Tensile tests were conducted to characterize mechanical properties of these FR nonwoven fabrics. The water vapor permeability test was also performed to measure the wearability of the fabric. Results of several polymer blends were compared to find the optimum formulation which will be used as low-cost thermal protective fabric in the future. © Copyright 2017. Used by the Society of the Advancement of Material and Process Engineering with permission.

关键词： Fibers

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Surface morphology and flammability of two flame resistant fibers and their blended nonwoven fabrics

Surface morphology and flammability of two flame resistant f...

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SAMPE Long Beach 2016 Conference and Exhibition

作者： Yao, Lan Koo, Joseph H. Wu, Hao Krifa, Mourad Donghua University Department of High-tech Textiles College of Textiles No. 2999 North Renmin Road Shanghai201620 China University of Texas at Austin Dept. of Mechanical Engineering 204 E. Dean Keeton-C2200 AustinTX78712 United States Materials Science and Engineering Materials and Science Program University of Texas at Austin AustinTX78712 United States School of Human Ecology-Textile and Apparel Technology University of Texas at Austin A270 AustinTX78712 United States

ISBN: (纸本)9781934551233

Protective clothing is essential for fire and heat protection in numerous professions. Instead of using flame resistant (FR) fabric finishing, the inherently FR fibers can be considered due to their long wear-life and durability. In this study, polybenzimidazole (PBI) fiber and Lenzing FR® fiber were selected to form FR nonwoven fabrics. The fiber surface structures were observed by Scanning Electron Microscopy (SEM) showing different structures for the two types of fibers. Typical flammability parameters including heat release rate (HRR) and heat release capacity (HRC) were tested for the two fibers using the Microscale Combustion Calorimeter (MCC). Both PBI and Lenzing FR® fibers show their high flame and heat resistance properties using MCC. In addition, the 20/80 PBI/Lenzing FR® blended nonwoven fabric was designed, fabricated, and tested. In general, the measured HRR results from MCC test showed relatively good agreement with the calculated peaks of Lenzing FR® and PBI fibers, showing the rule of mixtures for the HRRs for the blending fabrics. In the flame resistance test, the after-flame time of the fabric from the test is approximately 0.5s. The mean value of the char length of the as-received fabric is 3.8±0.89 inches. No melting or dripping were observed during the combustion. Copyright 2016. Used by the Society of the Advancement of Material and Process Engineering with permission.

关键词： Fibers

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A model of tripeptidyl-peptidase I (CLN2), a ubiquitous and highly conserved member of the sedolisin family of serine-carboxyl peptidases

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BMC Structural Biology 2003年第1期3卷 1-10页

作者： Wlodawer, Alexander Durell, Stewart R. Li, Mi Oyama, Hiroshi Oda, Kohei Dunn, Ben M. Protein Structure Section Macromolec. Cristal. Laboratory National Cancer Institute Frederick MD 21702 United States Lab. of Exp. and Compl. Biology National Cancer Institute Bethesda MD 20892 United States Basic Research Program SAIC-Frederick Inc. National Cancer Institute Frederick MD 21702 United States Department of Applied Biology Faculty of Textile Science Kyoto Institute of Technology Sakyo-ku Kyoto 606-8585 Japan Dept. of Biochem. and Molec. Biology University of Florida Gainesville FL 32610 United States

Background: Tripeptidyl-peptidase I, also known as CLN2, is a member of the family of sedolisins (serine-carboxyl peptidases). In humans, defects in expression of this enzyme lead to a fatal neurodegenerative disease, classical late-infantile neuronal ceroid lipofuscinosis. Similar enzymes have been found in the genomic sequences of several species, but neither systematic analyses of their distribution nor modeling of their structures have been previously attempted. Results: We have analyzed the presence of orthologs of human CLN2 in the genomic sequences of a number of eukaryotic species. Enzymes with sequences sharing over 80% identity have been found in the genomes of macaque, mouse, rat, dog, and cow. Closely related, although clearly distinct, enzymes are present in fish (fugu and zebra), as well as in frogs (Xenopus tropicalis). A three-dimensional model of human CLN2 was built based mainly on the homology with Pseudomonas sp. 101 sedolisin. Conclusion: CLN2 is very highly conserved and widely distributed among higher organisms and may play an important role in their life cycles. The model presented here indicates a very open and accessible active site that is almost completely conserved among all known CLN2 enzymes. This result is somehow surprising for a tripeptidase where the presence of a more constrained binding pocket was anticipated. This structural model should be useful in the search for the physiological substrates of these enzymes and in the design of more specific inhibitors of CLN2.

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Dual Colorimetric/Electrochemical Sensor of Carbaryl in Fruits on Microfluidic Paper-Based Analytical Device Connected with Smartphone Readout

SSRN

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SSRN 2023年

作者： Suk-In, Nichakorn Thongpim, Khemmika Phamonpon, Wisarttra Yukird, Jutiporn Ummartyotin, Sarute Rodthongkum, Nadnudda Department of Materials and Textile Technology Faculty of Science and Technology Thammasat University Pathumtani Thailand Nanoscience and Technology Program Graduate School Chulalongkorn University Phayathai Road Patumwan Bangkok10330 Thailand Metallurgy and Materials Science Research Institute Chulalongkorn University Phayathai Road Wangmai Patumwan Bangkok10330 Thailand Center of Excellence on Petrochemical and Materials Technology Chulalongkorn University Bangkok10330 Thailand Center of Excellence in Responsive Wearable Materials Chulalongkorn University Bangkok10330 Thailand

A dual colorimetric/electrochemical sensor integrated with a microfluidic paper-based analytical device (μPAD) is created for rapid and sensitive detection of cabaryl in fruit. For colorimetric sensor, quercetin modified silver nanoparticle (QCT-AgNPs) is synthesized via self-reduction, resulting in the color change from green to dark green in the presence of cabaryl, which can be readily observed via naked eyes. This colorimetric sensor provides a linear response of 5 – 50 μM quantified by Image J software. For electrochemistry, AgNPs/MXene nanocomposite electrode offers high electrocatalytic activity towards the detection of carbarly with a linear range of 0 – 60 µM and a detection limit of 1.86 µM. The limit of detection values obtained from this dual sensor are lower than a cut-off of carbaryl residue in food, which is 7 mg kg-1 (35 µM) verifying the desired sensitivity of this platform. Ultimately, this dual sensor is successfully applied for on-site detection of carbaryl in the orange samples read out on the smartphone with the satisfactory results. © 2023, The Authors. All rights reserved.

关键词： Smartphones

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