The Experts below are selected from a list of 2793 Experts worldwide ranked by ideXlab platform
Vera Castro, María Petronila - One of the best experts on this subject based on the ideXlab platform.
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Estrategia de comercializacion y la calidad de producto Luffa en la empresa kametsa export eirl en el distrito de los olivos-2015
'Universidad Nacional Federico Villarreal', 2018Co-Authors: Vera Castro, María PetronilaAbstract:TesisLa presente tesis de Maestría conlleva al beneficio económico de comercializar el producto Luffa bajo los lineamientos de estrategias en un ámbito de delimitar el Marketing en el contexto empresarial
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Estrategia de comercializacion y la calidad de producto Luffa en la empresa kametsa export eirl en el distrito de los olivos-2015
'Baishideng Publishing Group Inc.', 2018Co-Authors: Vera Castro, María PetronilaAbstract:La presente tesis de Maestría conlleva al beneficio económico de comercializar el producto Luffa bajo los lineamientos de estrategias en un ámbito de delimitar el Marketing en el contexto empresarial
Hui Lin - One of the best experts on this subject based on the ideXlab platform.
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ultrafine grinding of fly ash with grinding aids impact on particle characteristics of ultrafine fly ash and properties of blended cement containing ultrafine fly ash
Construction and Building Materials, 2015Co-Authors: Jihui Zhao, Dongmin Wang, Xueguang Wang, Shucong Liao, Hui LinAbstract:Abstract This paper presents the ultrafine grinding performance of fly ash with grinding aids (GA) and effect of GA on the particle characteristics, pozzolanic reaction degree of ultrafine fly ash (UFFA) and properties of blended cement containing UFFA. The experimental results indicate that GA can improve the particle characteristics of ground fly ash. The specific surface area of UFFA with 0.05 wt% GA is higher by 104 m 2 /kg than control sample. The particle size distribution of UFFA with GA becomes narrow and particle content of less than 16 μm is obviously increased. Additionally, the fluidity and loose bulk density of UFFA have also been improved. For pozzolanic reaction degree, 3-day, 7-day and 28-day hydration degree of UFFA with GA is increased by 1.2%, 2.3% and 4.6%, respectively; and 3-day, 7-day and 28-day activity index of UFFA with GA is also increased by 6%, 8% and 9%, respectively. For properties of blended cement containing UFFA, enhancement effect of UFFA with GA on the strength of blended cement containing 20 wt%, 30 wt% and 40 wt% fly ash are significant, and 3-day strength is increased by 12.6%, 6.6% and 6.6%, respectively, 28-day strength is increased by 6.5%, 9.3% and 10.5%, respectively. In this study, the hydration degree and microstructure of blended cement containing UFFA paste are also analyzed by SEM, XRD, IR and TG-DTA. The studies show that improvements such as hydration degree, products quantity, uniformity and compactness of products structure of blended cement containing UFFA are attributed to finer particle size and better particle size distribution caused by the addition of GA.
Ramesh C Ray - One of the best experts on this subject based on the ideXlab platform.
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ethanol production from mahula madhuca latifolia l flowers using free and immobilized in Luffa cylindrical l sponge discs cells of zymomonas mobilis mtcc 92
Annals of Microbiology, 2011Co-Authors: Shuvashish Behera, R C Mohanty, Ramesh C RayAbstract:A novel immobilization method involving Zymomonas mobilis immobilized in a Luffa (Luffa cylindrica L.) matrix for ethanol production from mahula (Madhuca latifolia L.) flowers was investigated. The dried spongy fruits of Luffa, a cucurbitaceous crop available in abundance in tropical and sub-tropical countries, have been found to be a promising material for immobilizing microbial cells. In our study, the cells not only survived, but they were also active physiologically for four growth cycles, yielding ethanol at 251.1 ± 0.012, 247.9 ± 0.08, 243.4 ± 0.042 and 240.71 ± 0.033 g/kg flowers in the first, second, third, and fourth cycles, respectively, after 96 h fermentation. Ethanol production by the immobilized cells was 9.2% higher than that by free cells. The ethanol yield (Yp/s), volumetric substrate uptake (Qs), and final sugar to ethanol conversion rate (%) obtained with Luffa-immobilized cells of Z. mobilis were 0.439 ± 0.004 g/g, 0.994 ± 0.009 g/l/h, and 87.8%, respectively, which were 7.06, 2.62, and 6.92% higher than that of free cells.
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ethanol production from mahula madhuca latifolia l flowers with immobilized cells of saccharomyces cerevisiae in Luffa cylindrica l sponge discs
Applied Energy, 2011Co-Authors: Shuvashish Behera, R C Mohanty, Ramesh C RayAbstract:The dried spongy fruit of Luffa (Luffa cylindrica L.), a cucurbitaceous crop available in abundance in tropical and sub-tropical countries has been found to be a promising material for immobilizing microbial cells. The aim of the present study was to examine the ethanol production from mahula flowers in submerged fermentation using whole cells of Saccharomyces cerevisiae immobilized in Luffa sponge discs. The cells not only survived but also were physiologically active in three more cycles of fermentation without significant reduction (
Genç Garip - One of the best experts on this subject based on the ideXlab platform.
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Investigation of the sound absorption and transmission loss performances of green homogenous and hybrid Luffa and jute fiber samples
'King Mongkut''s University of Technology North Bangkok', 2021Co-Authors: Özcan, Ahmet Cihan, Şanlıtürk, Kenan Y., Genç Garip, Körük HasanAbstract:In order to promote the use of natural fibers in noise and vibration applications, the properties of these structures should be fully identified. The sound absorption coefficients (SACs) and transmission losses (TLs) of green Luffa fiber samples are thoroughly investigated and their acoustic performances are compared with the acoustic performances of green homogenous jute and hybrid jute/Luffa fiber samples in this study. For this purpose, green homogenous Luffa and jute fiber samples and their green hybrid fiber samples with different thicknesses (10, 20, 30, and 40 mm) are produced and their SACs and TLs are determined using the impedance tube method. First, the methods for the experimental identification of acoustic properties are presented and the variations in the measured acoustic properties are identified. After that, the effects of sample thickness on the acoustic performances of homogenous Luffa as well as jute samples and their hybrid fiber samples as a function of frequency are explored. The thickness-dependent tendencies of the SACs and TLs of homogenous and hybrid Luffa and jute fiber samples for low, medium and high frequency ranges are determined. Then, the acoustic performances of the homogenous and hybrid Luffa and jute samples are compared and evaluated. The results and analyses for the acoustic properties of homogeneous Luffa and jute fiber samples and their hybrid fiber samples for a variety of thicknesses and different frequencies presented here can be used to design homogenous as well as hybrid Luffa and jute fiber structures in practical applications.TUBITAK (The Scientific and Technological Research Council of Turkey) under Grant 119M115Scopus - Affiliation ID: 6010507
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Jute and Luffa fiber-reinforced biocomposites: Effects of sample thickness and fiber/resin ratio on sound absorption and transmission Loss Performance
'Informa UK Limited', 2021Co-Authors: Körük Hasan, Özcan, Ahmet Cihan, Genç Garip, Şanlıtürk, Kenan Y.Abstract:The acoustic properties of natural fiber-reinforced composites should be identified before using these materials in various engineering applications including sound and vibration isolation. This study investigates the effects of sample thickness and fiber/resin ratio on the acoustic performance of jute and Luffa fiber-reinforced biocomposites. For this purpose, jute and Luffa composite samples with different thicknesses and fiber/epoxy ratios are manufactured and their sound absorption coefficients (SACs) and transmission losses (TLs) are determined using impedance tube method. Thickness-dependent tendencies of the SACs and TLs of jute and Luffa composites for low-, medium-, and high-frequency ranges are identified. The effect of fiber/epoxy ratio on the acoustic properties of jute and Luffa composites as a function of frequency are determined. Furthermore, the SACs and TLs of some natural fiber-based samples with different thicknesses are predicted using mathematical models and the theoretical and experimental results are compared and evaluated.TUBITAK (The Scientific and Technological Research Council of Turkey) under Grant 119M115.WOS:000638569100001Scopus - Affiliation ID: 60105072Science Citation Index ExpandedQ1Article; Early AccessUluslararası işbirliği ile yapılmayan - HAYIRNisan2021YÖK - 2020-2
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Acoustic and mechanical properties of Luffa fiber-reinforced biocomposites
'Elsevier BV', 2019Co-Authors: Körük Hasan, Genç GaripAbstract:This chapter presents an overview of acoustic and mechanical behaviors of Luffa fiber reinforced biocomposites. A growing number of studies are examining the composites of biodegradable fibers such as flax, hemp, kenaf and Luffa due to the adverse effects of chemical materials on nature. The low cost and superior acoustic and acceptable mechanical properties of biocomposites make them very attractive for practical applications such as sound and vibration isolation. However, the acoustic and mechanical characteristics of biocomposites and their dynamic behaviors should be fully determined before considering them for practical applications. In this chapter, acoustic properties, such as sound absorption and transmission loss, and mechanical properties, such as damping and elasticity of Luffa fiber reinforced composites, are presented. The variations in acoustic and mechanical properties due to different samples and manufacturing process are explored.WOS:000532438200017Book Citation Index- ScienceArticle; Book ChapterOcak2019YÖK - 2018-1
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Kabak ve jüt liflerinin mekanik özelliklerinin karşılaştırılması
'Afyon Kocatepe Universitesi Iktisadi ve Idari Bilimler Fakultesi Dergisi', 2019Co-Authors: Özdemir Yasin, Genç GaripAbstract:In this study, the mechanical properties of bio-composite materials produced by using plant-based fibers compared. Luffa fiber and jute were used as reinforcement in the production of these biocomposite samples. To able to compare the mechanical properties of the reinforcement the same matrix (epoxy) was used in the production of all samples. Three-point bending tests were performed to determine the mechanical properties of these specimens. According to the test results, the Flexural Stress of Luffa and jute fibers were measured 55 MPa and 36.5 MPa respectively. Also, Flexural Modulus calculated as 5.7 GPa for Luffa and 5.5 GPa for jute fibers. The strength of Luffa fibers experimentally determined as obviously higher than jute fiber. Due to the high strength of Luffa fibers should be preferred especially in applications that would be subjected to bending loads. Because of their design and strength characteristics of these green materials, it is envisaged that these materials could be an alternative for potential uses in aerospace, automotive and marine industries. We continue to work on the development of the mechanical properties of this kind of plant-based fibers in order to find a new alternative to glass fibers.Bu çalışmada, bitki esaslı lifler kullanılarak üretilen biyo-kompozit malzemelerin mekanik özellikleri karşılaştırılmıştır. Biyo-kompozit numunelerin üretiminde takviye elemanı olarak kabak lifi ve jüt kullanılmıştır. Üretilen biyo-kompozit numunelerin mekanik özelliklerinin karşılaştırılabilmesi için matris olarak epoksi reçine seçilmiştir. Mekanik özelliklerin belirlenmesi için eğilme deneyleri gerçekleştirilmiştir. Test sonuçlarına göre kabak lifi takviyeli kompozit numunelerin max. dayanımı 55 MPa jüt lifi takviyeli kompozit numunelerin max. dayanımı ise 36.5 MPa olarak ölçülmüştür. Ayrıca, Eğilme Modülü, kabak lifi için 5.7 GPa ve jüt lifi için 5.5 GPa olarak hesaplanmıştır. Elde edilen sonuçlara göre kabak liflerinin – jüte göre daha yüksek mukavemet değerlerine sahiptir. Bu nedenle özellikle eğilme yüklerine maruz uygulamalarda Kabak lifleri tercih edilmelidir. Bu biyokompozit malzemelerin özellikle havacılık, otomotiv ve denizcilik sektörlerindeki potansiyel kullanım alanları için alternatif olabileceği öngörülmektedir. Bir sonraki çalışmamızda mevcut bitkisel liflerin mekanik özelliklerinin iyileştirilmesi ve geliştirilmesi çalışılacaktır
Jihui Zhao - One of the best experts on this subject based on the ideXlab platform.
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ultrafine grinding of fly ash with grinding aids impact on particle characteristics of ultrafine fly ash and properties of blended cement containing ultrafine fly ash
Construction and Building Materials, 2015Co-Authors: Jihui Zhao, Dongmin Wang, Xueguang Wang, Shucong Liao, Hui LinAbstract:Abstract This paper presents the ultrafine grinding performance of fly ash with grinding aids (GA) and effect of GA on the particle characteristics, pozzolanic reaction degree of ultrafine fly ash (UFFA) and properties of blended cement containing UFFA. The experimental results indicate that GA can improve the particle characteristics of ground fly ash. The specific surface area of UFFA with 0.05 wt% GA is higher by 104 m 2 /kg than control sample. The particle size distribution of UFFA with GA becomes narrow and particle content of less than 16 μm is obviously increased. Additionally, the fluidity and loose bulk density of UFFA have also been improved. For pozzolanic reaction degree, 3-day, 7-day and 28-day hydration degree of UFFA with GA is increased by 1.2%, 2.3% and 4.6%, respectively; and 3-day, 7-day and 28-day activity index of UFFA with GA is also increased by 6%, 8% and 9%, respectively. For properties of blended cement containing UFFA, enhancement effect of UFFA with GA on the strength of blended cement containing 20 wt%, 30 wt% and 40 wt% fly ash are significant, and 3-day strength is increased by 12.6%, 6.6% and 6.6%, respectively, 28-day strength is increased by 6.5%, 9.3% and 10.5%, respectively. In this study, the hydration degree and microstructure of blended cement containing UFFA paste are also analyzed by SEM, XRD, IR and TG-DTA. The studies show that improvements such as hydration degree, products quantity, uniformity and compactness of products structure of blended cement containing UFFA are attributed to finer particle size and better particle size distribution caused by the addition of GA.
