Effect of Fique Fibers in the Behavior of a New Biobased Composite from Renewable Mopa-Mopa Resin

A fully biobased composite was developed using a natural resin from the Elaeagia Pastoensis Mora plant, known as Mopa-Mopa reinforced with fique fibers. Resin extraction was through solvent processing reaching an efficient extraction process of 92% and obtaining a material that acted as a matrix without using any supplementary chemical modifications as it occurs with most of the biobased resins. This material was processed by the conventional transform method (hot compression molding) to form the plates from which the test specimens were extracted. From physicochemical and mechanical characterization, it was found that the resin had obtained a tensile strength of 15 MPa that increased to values of 30 MPa with the addition of 20% of the fibers with alkalization treatment. This behavior indicated a favorable condition of the fiber-matrix interface in the material. Similarly, the evaluation of the moisture adsorption in the components of the composite demonstrated that such adsorption was mainly promoted by the presence of the fibers and had a negative effect on a plasticization phenomenon from humidity that reduced the mechanical properties for all the controlled humidities (47%, 77% and 97%). Finally, due to its physicochemical and mechanical behavior, this new biobased composite is capable of being used in applications such as wood–plastic (WPCs) to replace plastic and/or natural wood products that are widely used today.

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One for All and All in One: Modified Silica Kit-based Protocol for simultaneous sample-specific Extraction of DNA from a Variety of Source Materials

10.21203/rs.3.pex-1696/v1 ◽

2022 ◽

Author(s):

Wera M Schmerer

Keyword(s):

Sample Preparation ◽

Extraction Process ◽

Sample Material ◽

Modified Silica ◽

Dna Recovery ◽

Extraction And Purification ◽

Efficient Extraction ◽

Optimized Conditions ◽

Source Materials ◽

Reference Samples

Abstract Protocols utilized for the extraction of DNA vary significantly with regards to steps involved and duration of the overall procedure due to material-specific requirements for ensuring the highest possible yield in recovery of DNA. This variation mostly affects aspects of sample preparation and digestion steps required to release the DNA from the sample material.In contexts such as the development of new PCR-based assays - which always includes a test of species-specificity - reference samples from a number of species are utilized, requiring extraction of DNA from a variety of source materials, each with their specific conditions for effective isolation of DNA.The method presented here follows the strategy of synchronizing sample material-specific aspects such as sample preparation and digestion in such a way that one common protocol can be utilized for the actual extraction and purification of the DNA, allowing for an overall more efficient extraction process, while maintaining optimized conditions for DNA recovery.

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Determination of Mass Loss Rate and Smoke Generated of Jordanian Hardwood Timber under Different Flaming Combustion and Limited Ventilation Environment

WSEAS TRANSACTIONS ON APPLIED AND THEORETICAL MECHANICS ◽

10.37394/232011.2020.15.11 ◽

2020 ◽

Vol 15 ◽

Keyword(s):

Heat Flux ◽

Mass Loss ◽

Optical Density ◽

Loss Rate ◽

Mass Loss Rate ◽

Heat Fluxes ◽

Wood Products ◽

Specific Optical Density ◽

Flaming Combustion ◽

Natural Wood

Natural wood has been used in structural applications for decades. Smoke from wood fires, additives and wood-protective coatings is a cause of death and serious injury in limited ventilation compartment. Ventilation restrictions in modern day designs complicate the combustion process and increase incomplete combustion products due to a reduction in the amount of oxygen available for fuel oxidation. Jordanian hardwood samples have been examined, tested and evaluated according to their mass loss rates, specific optical density, mass optical density, transmittance, and visibility using qualitative research used to realise the dynamics of fire phenomena. Four types of natural wood were tested under different heat fluxes with different Flaming combustion in a Smoke Density Chamber (SDC). The samples studied were Beech, Oak, Rhamnus, and Abies. The samples have been exposed to 25 and 50 kW/m2 heat fluxes in a limited ventilation compartment. Twelve samples were tested, each with dimensions of 75 x 75 mm and 10 mm thickness. An evaluation of the tested parameters, such as mass loss rate (MLR), specific optical density, transmittance, visibility and mass optical density (MOD have been carried out to determine their effectiveness as predictive parameters. Main results shows Beech has the lower values of specific optical density despite it has higher values of MLR% and MOD compared to other samples studied. Also, the mass loss rate (MLR %) increases with the heat flux even with different flaming conditions. In the opposite, there is a strong dependence for the mass optical density (MOD) on the heat flux and flaming conditions. Key conclusions have been drawn up that could be used in wood products and future works. The main objective of this work is to model the fire dynamic behavior in the pre-fire time. The results of this study can provide the bases for ventilation process and considerations of using natural woods in Jordan for different applications.

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Optimization of the antioxidants extraction process from the bacaba (oenocarpus distichus mart.) using response surface methodology

Research Society and Development ◽

10.33448/rsd-v9i8.5427 ◽

2020 ◽

Vol 9 (8) ◽

pp. e229985427

Author(s):

Paula Beatriz Rocha Sampaio ◽

Andressa Sousa Pereira ◽

Caroline Roberta Freitas Pires ◽

Rodolfo Castilho Clemente ◽

Guilherme Nobre Lima do Nascimento

Keyword(s):

Antioxidant Activity ◽

Response Surface Methodology ◽

Rural Communities ◽

Response Surface ◽

Total Phenolics ◽

Extraction Process ◽

Solvent Mixture ◽

Chemical Characteristics ◽

Palm Trees ◽

Efficient Extraction

Bacaba (Oenocarpus distichus Mart) is a fruit that comes from palm trees native from the Arecaceae family and presents important nutritional and socioeconomic value for rural communities. Although being very popular, this fruit has very few cataloged chemical characteristics. The present study aimed to optimize the bacaba antioxidant extraction process by investigating the most efficient extraction interval and the best rotation time, using ethanol and methanol/acetone solvents, with the content of total phenolics and antioxidant activity. Methanol acetone solvent mixture was the most efficient solvent for extracting antioxidants from bacaba, with an extraction time of 90 minutes and 20 minutes of rotation interval at 5,000 rpm.

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PROTECTIVE WOOD TREATMENT WITH AN OLIGOMER CONTAINING STYRENE UNITS

10.34220/mmeitsic2021_261-265 ◽

2021 ◽

Author(s):

N. Nikulina ◽

Sergey Nikulin

Keyword(s):

Atmospheric Oxygen ◽

Wood Products ◽

Polymer Chains ◽

Important Criterion ◽

Wood Treatment ◽

Natural Wood ◽

Protective Composition ◽

Styrene Content ◽

Protective Treatment ◽

By Products

Currently, much attention is paid to the protective treatment of wood materials. This allows you to protect wood from adverse factors and extend the service life of products based on it. At the same time, not a little, an important criterion is the ratio of the price of the protective composition and its quality. The article discusses the possibility of using an oligomer for the protective treatment of natural wood, obtained on the basis of by-products of the production of polybutadiene and modified with secondary polystyrene. Considering the fact that this waste has not found its application, its use makes it possible to obtain not only valuable and affordable compositions based on it, but also to solve a number of environmental problems. For the modification, an oligomer with a bound styrene content of about 50% was used. The process was carried out at 200°C in the presence of a desiccant. At high temperatures and in the presence of atmospheric oxygen, destruction of both oligomer and secondary polystyrene occurs. The resulting destruction products interact with each other with the formation of new macromolecules containing an increased amount of styrene groups and the appearance of functional groups containing oxygen in the polymer chains. Protective treatment of natural wood with the obtained impregnating compounds allows to reduce water absorption and swelling of birch samples. This treatment allows you to extend the life of wood products.

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Palladium-Catalyzed Mizoroki–Heck and Copper-Free Sonogashira Coupling Reactions in Water Using Thermoresponsive Polymer Micelles

Polymers ◽

10.3390/polym13162717 ◽

2021 ◽

Vol 13 (16) ◽

pp. 2717

Author(s):

Noriyuki Suzuki ◽

Shun Koyama ◽

Rina Koike ◽

Nozomu Ebara ◽

Rikito Arai ◽

...

Keyword(s):

Good Yield ◽

Diblock Copolymers ◽

Extraction Process ◽

Coupling Reactions ◽

Sonogashira Coupling ◽

Polymer Micelles ◽

Heck Reactions ◽

Thermoresponsive Polymer ◽

Palladium Catalyzed ◽

Efficient Extraction

A few kinds of thermoresponsive diblock copolymers have been synthesized and utilized for palladium-catalyzed coupling reactions in water. Poly(N-isopropylacrylamide) (PNIPAAm) and poly(N,N-diethylacrylamide) (PDEAAm) are employed for thermoresponsive segments and poly(sodium 4-styrenesulfonate) (PSSNa) and poly(sodium 2-acrylamido-methylpropanesulfonate) (PAMPSNa) are employed for hydrophilic segments. Palladium-catalyzed Mizoroki–Heck reactions are performed in water and the efficiency of the extraction process is studied. More efficient extraction was observed for the PDEAAm copolymers when compared with the PNIPAAm copolymers and conventional surfactants. In the study of the Sonogashira coupling reactions in water, aggregative precipitation of the products was observed. Washing the precipitate with water gave the product with satisfactory purity with a good yield.

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Mechanical Characterization of Cement Reinforced with Fique Fibers

Materials for Buildings and Structures ◽

10.1002/3527606211.ch9 ◽

2005 ◽

pp. 55-65

Author(s):

A.J. Moraño ◽

L.E.G. Cambronero ◽

I. Chacón ◽

J.M. Ruiz Roman

Keyword(s):

Mechanical Characterization ◽

Fique Fibers

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Effect of Stearic Acid on Rheological Properties of 316L Feedstock for Metal injection Moulding

Jurnal Teknologi ◽

10.11113/jt.v59.2587 ◽

2012 ◽

Vol 59 (2) ◽

Author(s):

Istikamah Subuki ◽

Muhammad Hussain Ismail ◽

Amalina Amir ◽

Mohd Afian Omar

Keyword(s):

Residual Stress ◽

Stearic Acid ◽

Rheological Properties ◽

Injection Moulding ◽

Removal Rate ◽

Extraction Process ◽

Polymer Mixture ◽

Metal Injection Moulding ◽

Negative Effect ◽

Lower Temperature

Stearic acid (SA) was used as an additive in the process of metal injection moulding (MIM). It was added to the wax/polymer mixture in order to modify the powder wetting, mould lubrication, mixture viscosity, residual stress and debinding behaviour. In this study, the effect of SA in feedstock formulation on mixing torque and rheological properties was investigated. Further, it’s correlation on the as-moulded and as-debound parts behaviour was also investigated. The results showed that addition of SA significantly reduced the mixing torque value and viscosity which correspond to decreasing in inter-particle friction. As a result, injection moulding could be carried out at a lower temperature to achieve sound moulded parts and increased the removal rate of binder during solvent extraction process. However, it seemed that increasing the SA had a little negative effect on the as-moulded density.

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Production of no-carrier-added 89Zr at an 18 MeV cyclotron, its purification and use in investigations in solvent extraction

Journal of Radioanalytical and Nuclear Chemistry ◽

10.1007/s10967-021-07634-x ◽

2021 ◽

Vol 328 (1) ◽

pp. 419-423

Author(s):

Alexander Mansel ◽

Karsten Franke

Keyword(s):

Solvent Extraction ◽

Chemical Separation ◽

Extraction Process ◽

Liquid Extraction ◽

Radiotracer Technique ◽

Liquid Liquid Extraction ◽

Extraction And Purification ◽

Uteva Resin ◽

Efficient Extraction ◽

No Carrier Added

AbstractThe chemical separation of zirconium from lanthanides by liquid–liquid extraction is challenging but critical for medical and technological applications. Using the example of 89Zr, we optimize the liquid–liquid-extraction process by means of the radiotracer technique. We produced 89Zr by proton irradiation of a metallic yttrium target at a cyclotron. The purification of the radionuclide was performed by a UTEVA resin. 89Zr was separated in no-carrier-added form in a sulfuric acid solution. 89Zr was successfully used in solvent extraction tests with calixarenes for the separation of zirconium from lanthanides. This reaction is suitable for the efficient extraction and purification of lanthanides.

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Design of computerized monitoring and processing system for magnetic field controlling against the phenomenon of black powder in crude oil pipelines

International Journal of Electrical and Computer Engineering (IJECE) ◽

10.11591/ijece.v10i5.pp4639-4644 ◽

2020 ◽

Vol 10 (5) ◽

pp. 4639

Author(s):

Hussain Attia ◽

Saad Balhassan

Keyword(s):

Magnetic Field ◽

Crude Oil ◽

Black Power ◽

Processing System ◽

Extraction Process ◽

Black Powder ◽

Oil Pipelines ◽

Water Pipelines ◽

Oil Flow ◽

Negative Effect

Black power represents the main difficulty faced by the oil flow in pipelines. The negative effect of this powder reaches to stop the oil flow due to clogging the pipelines, in addition to the damaging of the crude oil pumps. Many solutions have been proposed in literature based on chemical or physical processes. On the other side, applying the fixed magnetic field has been presented in separation and extraction process of metal impurities in water pipelines applications. From these facts, this paper proposes an alternative solution (idea, design, and methodology for future implementation) for the black power removing from oil pipelines. The proposed system works on firstly sensing the resistivity parameter in the crude oil as an indication about the oil status with respect to the quantity of the black powder particles, then works on monitoring and controlling the level, location, and polarity of the required magnetic field that to work on cracking particles cracking function that in order to facilitate the crude oil motion in the pipelines. In addition, the proposed solution presents a new design of electrical resistivity sensor as an important indication in terms of evaluating the proposed system performance

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EXTRACTION OF BIOACTIVE COMPONENTS OF KETEPENG CINA (Senna alata L.) LEAFS USING ULTRASONIC AND MACERATION METHODS ON VARIOUS SOLUTION CONCENTRATIONS

Jurnal Penelitian Pascapanen Pertanian ◽

10.21082/jpasca.v18n1.2021.31-36 ◽

2021 ◽

Vol 18 (1) ◽

pp. 31

Author(s):

Adnan Nur Avif ◽

Ardhi Billih Yaqhsa

Keyword(s):

Skin Diseases ◽

Raw Materials ◽

Extraction Process ◽

Ultrasonic Waves ◽

Total Phenolic ◽

Bioactive Components ◽

Plant Extraction ◽

Randomized Design ◽

Efficient Extraction ◽

Senna Alata

Ketepeng cina Senna alata L. is one of the plant species growing in the tropical climate whose leaves have various bioactive components. It has been used as a traditional medicine to treat skin diseases. Ketepeng cina has been cultivated in several regions in Indonesia and the results are exported abroad to be used as medicinal raw materials. So far, the plant extraction process is still using the maceration method. This method is simple but has weaknesses in time consumption making it less efficient. The extraction method by ultrasonic waves promises more efficient extraction process than the maceration method. The purpose of this study was to determine the differences in extraction techniques and solvent concentration on the concentration of phytochemical constituents in ketepang cina leaves. The research design used a completely randomized design with two factorial patterns. The first factor was the technique of extracting Ketepeng cina leaves (maceration, ultrasonication), and the second factor was the concentration of solvent/ethanol (40%, 70%, 96%) The observation parameters included analysis of the content of total phenolic compounds, flavonoids, and tannins. The results showed that the use of the ultrasonication technique provided efficiency in extraction time compared to the maceration technique. The use of 70% ethanol resulted in higher concentrations of total phenolic and flavonoid compounds (28,17 mgGA/g) and (17,61 mgQE/g), but the highest concentration of tannins produced by 96% ethanol solvent was 6,78 mgAT/g.

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