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Development and Characterization of Eco-Friendly Non-Isocyanate Urethane Monomer from Jatropha curcas Oil for Wood Composite Applications

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Journal of Renewable Materials 2023年第1期11卷 41-59页

作者： samsul bhakri Muhammad Ghozali Edy Cahyono Evi Triwulandari Witta Kartika Restu Nissa Nurfajrin Solihat Apri Heri Iswanto Petar Antov Viktor Savov Lee Seng Hua ErikaAyu Agustiany Lubos Kristak Widya Fatriasari Department of Chemistry Universitas Negeri SemarangSemarang50229Indonesia Research Center for Chemistry National Research and Innovation Agency(BRIN)Serpong15314Indonesia Research Center for Biomass and Bioproducts National Research and Innovation Agency(BRIN)Cibinong16911Indonesia Department of Forest Product Faculty of ForestryUniversitas Sumatera UtaraMedan20155Indonesia JATI-Sumatran Forestry Analysis Study Center Medan20155Indonesia Faculty of Forest Industry University of ForestrySofia1797Bulgaria Laboratory of Biopolymer and Derivatives Institute of Tropical Forestry and Forest ProductUniversiti Putra MalaysiaSelangor43400Malaysia Department of Forest Products Faculty of Forestry and EnvironmentIPB UniversityBogor16680Indonesia Faculty of Wood Sciences and Technology Technical University in ZvolenZvolen96001Slovakia

The aim of this research work was to evaluate the potential of using renewable natural feedstock,i.e.,Jatropha curcas oil(JCO)for the synthesis of non-isocyanate polyurethane(NIPU)resin for wood composite *** polyurethane(PU)is synthesized through a polycondensation reaction between isocyanate and ***,utilizing toxic and unsustainable isocyanates for obtaining PU could contribute to negative impacts on the environment and human ***,the development of PU from eco-friendly and sustainable resources without the isocyanate route is *** this work,tetra-n-butyl ammonium bromide was used as the activator to open the epoxy ring with 3-Aminopropyltriethoxisylane as a catalyst to yield urethane of JCO(UJCO).The UJCO were characterized by Fourier Transform Infra-Red spectroscopy(FTIR)and their oxirane,and hydroxyl values were *** result showed that a decrease in oxirane value was found while the hydroxyl value was increased during the time,confirming that the urethane group was *** presence of functional groups in FTIR spectra at wave numbers 1732.08,1562.34,and 3348.42 cm^(−1) indicates the functional groups of C=O(urethane carbonyl),–NH,and–OH,respectively confirmed this *** potential applications of NIPU in the wood composite were also outlined.

关键词： Jatropha curcas oil urethane groups non-isocyanate polyurethane epoxidized JCO cyclic carbonate oxirane value wood composites

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Dynamical Comparison of Several Third-Order Iterative Methods for Nonlinear Equations

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Computers, Materials & Continua 2021年第5期67卷 1951-1962页

作者： Obadah Said Solaiman samsul Ariffin Abdul Karim Ishak Hashim Department of Mathematical Sciences Faculty of Science&TechnologyUniversiti Kebangsaan MalaysiaBangi Selangor43600Malaysia Department of Fundamental and Applied Sciences Center for Smart Grid Energy Research(CSMER)Institute of Autonomous SystemUniversiti Teknologi PETRONASBandar Seri IskandarSeri IskandarPerak DR32610Malaysia

There are several ways that can be used to classify or compare iterative methods for nonlinear equations,for instance;order of convergence,informational efficiency,and efficiency *** this work,we use another way,namely the basins of attraction of the *** purpose of this study is to compare several iterative schemes for nonlinear *** the selected schemes are of the third-order of convergence and most of them have the same efficiency *** comparison depends on the basins of attraction of the iterative techniques when applied on several polynomials of different *** a comparison,we determine the CPU time(in seconds)needed by each scheme to obtain the basins of attraction,besides,we illustrate the area of convergence of these schemes by finding the number of convergent and divergent points in a selected range for all *** confirm the fact that basins of attraction differ for iterative methods of different orders,furthermore,they vary for iterative methods of the same order even if they have the same efficiency ***,this leads to the need for a new index that reflects the real efficiency of the iterative scheme instead of the commonly used efficiency index.

关键词： Nonlinear equations iterative methods basins of attraction order of convergence

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Scattered Data Interpolation Using Cubic Trigonometric Bézier

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Computers, Materials & Continua 2021年第10期69卷 221-236页

作者： Ishak Hashim Nur Nabilah Che Draman samsul Ariffin Abdul Karim Wee Ping Yeo Dumitru Baleanu Department of Mathematical Sciences Faculty of Science and TechnologyUniversiti Kebangsaan MalaysiaUKMBangi43600Selangor Darul EhsanMalaysia Department of Fundamental and Applied Sciences Universiti Teknologi PETRONASSeri Iskandar32610Perak Darul RidzuanMalaysia Department of Fundamental and Applied Sciences and Centre for Systems Engineering(CSE) Institute of Autonoumous System Universiti Teknologi PETRONASSeri Iskandar32610Perak Darul RidzuanMalaysia Faculty of Science Universiti Brunei DarussalamBandar Seri BegawanBE1410Brunei Darussalam Department of Mathematics Cankaya UniversityAnkaraTurkey Institute of Space Sciences Magurele-BucharestRomania Department of Medical Research China Medical University HospitalChina Medical UniversityTaichungTaiwan

This paper discusses scattered data interpolation using cubic trigonometric Bézier triangular patches with C1 continuity *** derive the C1 condition on each adjacent *** each triangular patch,we employ convex combination method between three local *** final interpolant with the rational corrected scheme is suitable for regular and irregular scattered data *** tested the proposed scheme with 36,65,and 100 data points for some well-known test *** scheme is also applied to interpolate the data for the electric *** compared the performance between our proposed method and existing scattered data interpolation schemes such as Powell–Sabin(PS)and Clough–Tocher(CT)by measuring the maximum error,root mean square error(RMSE)and coefficient of determination(R^(2)).From the results obtained,our proposed method is competent with cubic Bézier,cubic Ball,PS and CT triangles splitting schemes to interpolate scattered data *** is very significant since PS and CT requires that each triangle be splitting into several micro triangles.

关键词： Cubic trigonometric Bézier triangular patches C1sufficient condition scattered data interpolation

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IoT-Enabled Plant Monitoring System with Power Optimization and Secure Authentication

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Computers, Materials & Continua 2024年第11期81卷 3165-3187页

作者： samsul Huda Yasuyuki Nogami Maya Rahayu Takuma Akada MdBiplob Hossain Muhammad Bisri Musthafa Yang Jie Le Hoang Anh Green Innovation Center Okayama UniversityOkayama700-8530Japan Graduate School of Environmental LifeNatural Science and TechnologyOkayama UniversityOkayama700-8530Japan

Global food security is a pressing issue that affects the stability and well-being of communities *** existing Internet of Things(IoT)enabled plant monitoring systems have made significant strides in agricultural monitoring,they often face limitations such as high power consumption,restricted mobility,complex deployment requirements,and inadequate security measures for data *** paper introduces an enhanced IoT application for agricultural monitoring systems that address these critical *** system strategically combines power efficiency,portability,and secure access capabilities,assisting farmers in monitoring and tracking crop environmental *** proposed system includes a remote camera that captures images of surrounding plants and a sensor module that regularly monitors various environmental factors,including temperature,humidity,and soil *** implement power management strategies to minimize energy consumption compared to existing *** conventional systems,our implementation utilizes the Amazon Web Services(AWS)cloud platform for reliable data storage and processing while incorporating comprehensive security measures,including Two-Factor Authentication(2FA)and JSON Web Tokens(JWT),features often overlooked in current agricultural IoT *** can access this secure monitoring system via a developed Android application,providing convenient mobile access to the gathered plant *** validate our system’s advantages by implementing it with two potted garlic plants on Okayama University’s *** evaluation demonstrates high sensor reliabil-ity,with strong correlations between sensor readings and reference data,achieving determination coefficients(R2)of 0.979 for temperature and 0.750 for humidity *** implemented power management strategies extend battery life to 10 days on a single charge,significantly outperforming existing systems that typically require daily ***

关键词： Plant monitoring agriculture food security environmental monitoring IoT power management AWS secure access JWT

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Repercussion of salinity on hematological parameters and tissue morphology of gill and kidney at early life of tilapia

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Aquaculture and Fisheries 2024年第2期9卷 256-264页

作者： Azhar Ali Md Golam Azom Bhakta Supratim Sarker Hasu Rani Md samsul Alam m.sadiqul islam*department of fisheries biology and genetics bangladesh agricultural universitymymensingh2202bangladesh

This study was attempted to reveal the changes in three hematological parameters such as blood hemoglobin,number of white blood cells(WBCs)and number of red blood cells(RBCs)and one biochemical(e.g.,glucose)parameter along with the changes in histomorphological structures of gills and kidney of Nile tilapia fry reared in saline *** experimental set up were used for two different age groups-5 days-after-hatch(5DAH)and 15 days-after-hatch(15DAH)-to test a novel hypothesis:if a little difference in the age during the first exposure to saline water could produce any variation in the *** were placed into 6 plastic drums having six different salinity levels:0,5,10,15,20 and *** 60 days,at least 5 individuals were taken out from each drum to observe the above-hematological and histomorphological parameters.A two-way-ANOVA revealed that,except for hemoglobin,all the observed parameters have been affected the effect of age×salinity interaction(P<0.05).Between the two age groups,only the overall average glucose value and RBC count were significantly *** various salinity levels,only RBC and WBC counts differed ***,the mean glucose value,RBC counts and WBC count at different salinities differed significantly from the base mean value of each *** regard to the histomorphological structure of the gills and kidney,various malformations were *** hypertrophy,epithelial uplifting and epithelial necrosis were present as gill degenerations,hyperplasia was prevalent across almost all salinity *** the other hand,glomerular necrosis,pyknotic nucleus,hyaline droplets degeneration,shrinking of the glomeruli,*** observed in kidney *** assisting to understand the effects of salinity stress,all these data on tilapia fry will help to determine the prospects and scope of culturing the species in high-salinity water.

关键词： Nile tilapia Salinity Blood parameters Histomorphology Age groups

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Assessment of genetic diversity, detection of strain-specific single nucleotide polymorphisms and identification of the Bangladesh and Vietnam strain of Channa striata by PCR-RFLP analysis of the mitochondrial COI gene fragment

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Aquaculture and Fisheries 2022年第3期7卷 287-295页

作者： Md samsul Alam Foyjunnesa Projna Mst.Sadia Zafrin Rituparna Das Mohd Golam Quader Khan Department of Fisheries Biology and Genetics Bangladesh Agricultural UniversityMymensingh2202Bangladesh

Striped snakehead(Channa striata)has enormous fisheries and aquaculture importance due to its high market demand and food ***,Vietnam strain of the species has been introduced to Bangladesh for ***,it is essential to develop a reliable molecular technique that can distinguish the Bangladesh strain from the Vietnam ones as biological invasion by feral exotic fish to the wild may cause enduring damage to ecosystem and species *** clips from snakehead samples were collected from six locations and total DNA was *** cytochrome oxidase c 1(COI)gene fragment was amplified by PCR using the Fish F1/R1 primer set and sequenced for analysis of intra-and inter-strain genetic diversity and detection of single nucleotide polymorphism to distinguish the Vietnam strain from Bangladesh ones.A total of 15 haplotypes were identified with an overall haplotype diversity of *** median-joining network created based on COI gene sequences clearly differentiated the Bangladesh strain from the strain of Vietnamese origin by a total of 18 single nucleotide *** In silico restriction analysis revealed AluI was the most suitable restriction enzyme that produced diagnostic restriction profiles of the two strains of ***-RFLP analysis by the restriction enzyme AluI created distinguishing restriction profile similar to that in the In silico *** work illustrates a simple,reliable and inexpensive molecular tool for the identification of the Bangladesh and Vietnam strains of *** by one-step PCR and restriction of the COI gene fragment.

关键词： COI Channa striata snakehead Genetic diversity SNP PCR-RFLP

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高性能阳离子皂洗剂的制备及在活性染料棉织物洗涤中的应用

高性能阳离子皂洗剂的制备及在活性染料棉织物洗涤中的应用

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作者： ISLAM MD samsul 浙江理工大学

学位级别：硕士

活性染料色泽鲜艳,且色牢度优良,多用于棉织物的着色,其需求逐年增加。然而,活性染料染色和印花时仍有一些缺点。染色期间,水解/未固色的活性染料并不能与纤维反应,这浮色染料不仅会降低色牢度,而且会在同一洗涤浴中的织物间发生色迁移... 详细信息

活性染料色泽鲜艳,且色牢度优良,多用于棉织物的着色,其需求逐年增加。然而,活性染料染色和印花时仍有一些缺点。染色期间,水解/未固色的活性染料并不能与纤维反应,这浮色染料不仅会降低色牢度,而且会在同一洗涤浴中的织物间发生色迁移。因此,有必要从织物中去除那些未固色的染料,以避免色牢度差、织物间沾色等不良影响。染色后,以具有防沾性能的皂洗剂对面料有效水洗,可去除这些浮色染料,避免织物间的沾色。为此,本文通过N-乙烯基吡咯烷酮的共聚制备了一系列阳离子防沾皂洗剂,并以傅里叶变换红外光谱（FTIR）表征了助剂的结构,进而采用Data color650分光光度计、紫外-可见分光光度计、摩擦牢度仪等对助剂的皂洗防沾性能进行了评价,并将开发的皂洗剂与市场上的商业产品进行了比较。理论上讲,皂洗剂应溶于水,并具有适当的阳离子性质,以实现皂洗剂与活性染料（为阴离子）结合,并将洗除的染料稳定分散于水中。因此,论文将水溶性单体N-乙烯基吡咯烷酮（NVP）分别与两种阳离子单体N-乙烯基咪唑（NVI）和2-（二甲氨基）甲基丙烯酸乙酯共聚,制备两个系列的阳离子皂洗剂（DMAEMA）,并考察了他们的皂洗性能。首先,以水为溶剂,将NVP与NVI共聚,并通过改变单体组成,得到一系列共聚组成的P（VP-co-VI）的水溶液。之后,将P（VP-co-VI）用作皂洗剂,在0.5g/L和1g/L两个用量,以及皂洗液p H=4、7和10下,评估了其去除浮色的效率。研究发现:皂洗剂的共聚组成、用量以及皂洗液p H值均对皂洗有较大的影响;其中,VI单体质量分数为20%时,皂洗剂的性能最优,且p H=10,用量1g/L时效果最佳。其次,为降低皂洗剂的成本,以阳离子单体2-（二甲氨基）甲基丙烯酸乙酯（DMAEMA）替代VI,与VP共聚,得到了DMAEMA,wt%分别为2%、5%、8%和10%四种共聚组成的P（VPco-DMAEMA）。对其皂洗性能评测后发现,上述四种皂洗剂去除浮色的效率均不及P（VPco-VI）（VI,wt%=20%）,推测其原因可能在于DMAEMA具有过高的阳离子特性。之后,为了降低P（VP-co-DMAEMA）的阳离子性,分别采用两种方案:其一,将VP,DMAEMA与AA三元共聚,结果表明:P（VP-co-DMAEMA-co-AA）（95%/4%/1%）仅略优于P（VPco-DMAEMA）（95%/5%）,但远不及P（VP-co-VI）;其二,P（VP-co-DMAEMA）（95%/5%）与十二烷基硫酸钠复配,得到SDS含量为1%、2%、3%和5%的四种复配型皂洗剂,测试表明:复配方案明显优于以上与AA的共聚方案,其中SDS含量为1%和2%时,皂洗性能与P（VPco-VI）（80%/20%）相当,其几乎不受p H的影响,性能优于大多数市场产品。当以P（VP-co-VI）（80%/20%）、P（VP-co-DMAEMA）（95%/5%）+SDS（wt%=1%和2%）三种样品为皂洗剂时,洗后原布的干摩擦色牢度由1级提升至5级,湿摩擦色牢度由1级提升至4级;用于评测沾色性能的白色棉布颜色几乎不变,但当采用多组分面料时（醋酯/棉/尼龙/涤纶/羊毛/腈纶）,沾色由浅至深依次为:棉、腈纶、涤纶、尼龙、醋酯和羊毛。因此,通过评估不同皂洗剂的相关洗涤特性,结果表明,所研制的VP/VI 20（80%/20%）和V/D5/SDS2（95%/5%+2%SDS）皂洗剂对活性染料棉织物的不固定染料去除效果好,使用工艺简单,且考虑到生产成本,V/D5/SDS2（95%/5%+2%SDS）皂洗剂在世界各地的纺织工业中应用是非常经济的。

关键词： N-乙烯基吡咯烷酮活性染料皂洗剂 pH值未固定染料色强度(k/s) 残留染料分子

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Clinical features of severe malaria:Protective effect of mixed plasmodial malaria

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Asian Pacific Journal of Tropical Biomedicine 2017年第1期7卷 4-9页

作者： Bagus Hermansyah Loeki Enggar Fitri Teguh Wahju Sardjono Agustina Tri Endharti samsul Arifin Niniek Budiarti Didi Candradikusuma Erma Sulistyaningsih Nicole Berens-Riha Department of Parasitology Faculty of MedicineUniversity of JemberJemberEast JavaIndonesia Department of Parasitology Faculty of MedicineUniversity of BrawijayaMalangEast JavaIndonesia Department of Biochemistry and Biomolecular Faculty of MedicineUniversity of BrawijayaMalangEast JavaIndonesia Division of Tropical Medicine and Infectious Diseases Department of Internal MedicineDr.Saiful Anwar HospitalEast JavaIndonesia Division of Tropical Medicine and Infectious Diseases Department of Internal MedicineFaculty of MedicineUniversity ofBrawijayaMalangEast JavaIndonesia Division of Infectious Diseases and Tropical Medicine Medical Centre of the University of Munich(LMU)Leopoldstrasse580802MunichGermany

Objective: To investigate clinically severe malaria patients with Plasmodium falciparum(P. falciparum), Plasmodium vivax(P. vivax) and mixed species ***: This study was conducted at Dr. Saiful Anwar General Hospital, Malang,Indonesia, from December 2011 to May 2013. Twenty nine patients(mean age of 41 years, 22% female), who suffered from severe malaria according to World Health Organization criteria(major and minor) and other criteria based on previous studies, were selected by consecutive sampling. Blood samples were obtained at admission from peripheral blood for microscopic diagnostic, nested PCR and laboratory examination of blood chemistry. Laboratory results were compared between the groups and correlated to each ***: From 29 samples, eight(28%) were diagnosed as P. falciparum mono-infection,12(41%) as P. vivax mono-infection and nine(31%) as mixed infections, confirmed by PCR. Cerebral malaria occurred in P. falciparum or mixed species infection only. Parasitaemia was highest in P. falciparum mono-infection. Mean haemoglobin was significantly lower in P. falciparum than P. vivax infection(P = 0.01). Mean thrombocyte count(77 138/m L) was low in all groups. Mean urea, creatinine, total and direct bilirubin were significantly higher in P. falciparum mono-infection compared to other groups, whereas aspartate aminotransferase and alanine aminotransferase showed no significant differences. Parasitaemia was positively correlated with an increase in urea, creatinine, bilirubin and leucocytosis in all ***: Both Plasmodium species can solely or in combination cause severe malaria. Mixed infection was generally more benign than P. falciparum mono-infection and seemed to have some protective effects.

关键词： Parasitaemia Plasmodium falciparum Plasmodium vivax Severe malaria Serum creatinine level Mixed infections

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Healthcare workers' knowledge towards Zika virus infection in Indonesia:A survey in Aceh

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Asian Pacific Journal of Tropical Medicine 2017年第2期10卷 182-186页

作者： Harapan Harapan Alma Aletta samsul Anwar Abdul M.Setiawan Reza Maulana Nur Wahyuniati Muhammad R.Ramadana Sotianingsih Haryanto Alfonso J.Rodriguez-Morales Kurnia F.Jamil Medical Research Unit School of MedicineSyiah Kuala University Tropical Disease Centre School of MedicineSyiah Kuala University Department of Microbiology School of MedicineSyiah Kuala University Department of Family Medicine School of MedicineSyiah Kuala University Department of Statistics Faculty of Mathematics and Natural SciencesSyiah Kuala University Department of Microbiology Faculty of Medicine and Health SciencesState Islamic University of Maulana Malik Ibrahim Department of Clinical Pathology Faculty of Medicine and Health SciencesJambi University Public Health and Infection Research Incubator and Group Faculty of Health SciencesUniversidad Tecnologica de Pereira Department of Internal Medicine School of MedicineSyiah Kuala University

Objective:To assess the knowledge on Zika virus(ZIKV) infection among healthcare providers(doctors) in Aceh province,***:A self-administered internet based survey was conducted from 3 May to 3 June 2016 among the members of doctor organizations in Aceh province.A set of validated,pre-tested questionnaire was used to measure knowledge regarding ZIKV infection and to collect a range of explanatory variables.A two-steps logistic regression analysis was employed to assess the association of participants' demographic,workplace characteristics and other explanatory variables with the ***:A total of 442 participants included in the final analysis and 35.9% of them(159) had a good knowledge on ZIKV *** model revealed that type of occupation,type of workplace,availability of access to medical journals and experience made Zika disease as differential diagnose were associated with knowledge on ZIKV *** addition,three significant source of information regarding ZIKV were online media(60%),medical article or medical news(16.2%) and television(13.2%).Conclusion:The knowledge of the doctors in Aceh regarding ZIKV infection is relatively *** who have a good knowledge on ZIKV infection are more confident to established ZIKV disease as differential diagnosis in their clinical ***,such program to increase healthcare providers' knowledge regarding ZIKV infection is needed to screen potential carriers of ZIKV infection.

关键词： Zika virus Zika fever Knowledge Attitude Health care worker Indonesia

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A Numerical Simulation of Air Flow in the Human Respiratory System Based on Lung Model

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Journal of Applied Mathematics and Physics 2023年第8期11卷 2205-2215页

作者： Md. Kamrul Hasan Mahtab U. Ahmmed Md. samsul Arefin Department of Mathematics Khulna University of Engineering and Technology Khulna Bangladesh Department of Mathematics Jahangirnagar University Dhaka Bangladesh

The lung is an important organ that takes part in the gas exchange process. In the study of gas transport and exchange in the human respiratory system, the complicated process of advection and diffusion (AD) in airways of human lungs is considered. The basis of a lumped parameter model or a transport equation is modeled during the inspiration process, when oxygen enters into the human lung channel. The quantitative measurements of oxygen are detached and the model equation is solved numerically by explicit finite difference schemes. Numerical simulations were made for natural breathing conditions or normal breathing conditions. The respiratory flow results for the resting conditions are found strongly dependent on the AD effect with some contribution of the unsteadiness effect. The contour of the flow rate region is labeled and AD effects are compared with the variation of small intervals of time for a constant velocity when breathing is interrupted for a negligible moment.

关键词： Lumped Model Lumped Model Channel Mass Flow Rate Ideal Law of Gas 2D Advection Diffusion Equation Finite Difference Scheme

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