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Articoli di riviste sul tema "Extraction des sources"

Autore: Grafiati

Pubblicato: 21 dicembre 2024

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1

Rosales-Garcia, Teresa, Cristian Jimenez-Martinez e Gloria Davila-Ortiz. "Squalene Extraction: Biological Sources and Extraction Methods". International Journal of Environment, Agriculture and Biotechnology 2, n. 4 (2017): 1662–70. http://dx.doi.org/10.22161/ijeab/2.4.26.

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Tan, Yew Ai, e Ainte Kuntom. "Hydrocarbons m Crude Palm Kernel Oil". Journal of AOAC INTERNATIONAL 77, n. 1 (1 gennaio 1994): 67–73. http://dx.doi.org/10.1093/jaoac/77.1.67.

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Abstract The sources of hydrocarbons in crude palm kernel oil were investigated by a series of laboratory-controlled oil extractions of kernels of varying quality. Site examinations of palm kernel-crushing plants were also conducted to determine possible sources of hydrocarbon contamination of palm kernels throughout the process of kernel extraction. Parallel to these studies, a random survey of crude palm kernel oil (CPKO) produced by different kernel crushers was also carried out to determine the range of hydrocarbon concentrations in locally produced CPKO. This study showed that hydrocarbons can be picked up from sources such as glassware, extracting apparatus, and plastic containers and stoppers. Extraction of oil from low-quality kernels that were both moldy and rancid, broken kernels, and kernels plus added shells also resulted in a higher hydrocarbon level in the final CPKO. Overheating and cooking of the kernels before extraction also contributed to the overall hydrocarbon content. The random survey of hydrocarbon level showed a range of 0.6–7.1 ppm.

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Jovanovic, Aleksandra, Predrag Petrovic, Verica Ðordjevic, Gordana Zdunic, Katarina Savikin e Branko Bugarski. "Polyphenols extraction from plant sources". Lekovite sirovine, n. 37 (2017): 45–49. http://dx.doi.org/10.5937/leksir1737045j.

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Kuber, B. Ramya, D. Sravya e I. Theja. "INNOVATIVE EMERGING TECHNOLOGIES FOR EXTRACTION OF PHYTOCHEMICALS FROM NATURAL SOURCES". International Journal on Biological Sciences 13, n. 02 (2022): 120–26. http://dx.doi.org/10.53390/ijbs.v13i2.4.

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Due to their established health benefits, phytochemicals such as phenolics, carotenoids, sterols, and alkaloids are becoming more and more popular. However, some of these phytochemicals may not be amenable to typical extraction techniques. Examples of innovative methods include supercritical fluid extraction (SFE), microwave extraction (MWE), pulsed electric field (PEF), highpressure processing (HPP), and ultrasonic extraction (UE), and ohmic heating (OH). Supercritical fluid extraction is one of the methods that is most often researched and has already found commercial use for number of products. The most used supercritical fluid for agricultural products is carbon dioxide. Additionally growing, and already having commercial uses, is microwave extraction. By using electromagnetic radiation to quickly and uniformly heat the matrix, this technique produces extractions with high quantities of phytochemicals and few impurities. Despite current interest in pulsed electric fields, which have several benefits over thermal treatments, their usage is still limited to a small number of industrial units. Ohmic heating occurs when alternating current is sent through the matrix, heat is produced bysample's electrical resistance discharging. Low-frequency electrical energy is demonstrated to promote the extraction of phytochemicals since it dissipates into heat quickly and uniformly. High-pressure processing has potential to improve diffusion, increase mass transfer and cell permeability, and maintain food quality. HPP reduces negative effects of heat while greatly enhancing texture. HPP employs high pressures and moderate temperatures in comparison to traditional extraction techniques. With the employment of a combination of cutting-edge technologies that will enable the production of high-quality phytochemicals with little degradation, future of phytochemical extraction is undoubtedly brigh

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DA, Bansode. "Exploring Diverse Techniques for Phytochemical Extraction from Plant Sources A Comprehensive Review". International Journal of Pharmacognosy & Chinese Medicine 8, n. 1 (28 febbraio 2024): 1–11. http://dx.doi.org/10.23880/ipcm-16000266.

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The extraction of bioactive compounds from plant materials is imperative within the pharmaceutical industry. The standardization of extraction procedures is directed at the elimination of undesirable constituents, facilitating the isolation of the most enriched bioactive fraction from herbs. This refined fraction, obtained through the application of diverse solvent systems, is designed to optimize therapeutic potential. Phytochemicals derived from various plant components function as direct sources of medicinal agents, providing a comprehensive characterization of the myriad secondary metabolic compounds inherent in plants. The extraction of bioactive compounds, coupled with their quantitative and qualitative evaluation, assumes significance in the identification of novel biomolecules applicable to the pharmaceutical and agrochemical sectors. This review predominantly concentrates on analytical methodologies, incorporating extraction methods and the analysis of bioactive compounds in plant extracts through diverse techniques. Prominent progress in modern green extraction methods, such as supercritical fluid, ultrasound, accelerated solvent, microwave, and enzyme-assisted extraction, is gaining recognition. The critical assessment of extraction conditions in this review elucidates both conventional solvent-based and robust modern and green extraction techniques. Numerous methods have been devised to extract phytochemicals with efficiency, ensuring high quality, purity, and cost-effectiveness while minimizing environmental impact. Molecular hydrogen (H2) has emerged as a promising catalyst for enhancing phytochemical extraction from plant materials, presenting an innovative avenue for improving extraction efficiency

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Xiong, Yuecheng, Jingwen Zhou, Pengyi Lu, Jinwen Yin, Yunhao Wang e Zhanxi Fan. "Electrochemical lithium extraction from aqueous sources". Matter 5, n. 6 (giugno 2022): 1760–91. http://dx.doi.org/10.1016/j.matt.2022.04.034.

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Tedmori, Sara, Thomas W. Jackson e Dino Bouchlaghem. "Locating knowledge sources through keyphrase extraction". Knowledge and Process Management 13, n. 2 (2006): 100–107. http://dx.doi.org/10.1002/kpm.250.

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Sultana, Hujaifa, Abhinab Chetia, Abhigyan Saikia e Nekibul Jaman Khan. "An Updated Review on Extraction, Isolation, and Identification of Bioactive Compounds from Plant Extracts". Scholars Academic Journal of Pharmacy 12, n. 07 (3 luglio 2023): 154–71. http://dx.doi.org/10.36347/sajp.2023.v12i07.001.

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Plant extracts have long been used for their medicinal qualities and as sources of bioactive chemicals. In recent years, there has been a surge in interest in investigating the possibilities of plant extracts in a variety of disciplines, including medicine, cosmetics, and food. This abstract presents an up-to-date assessment of methods for extracting, isolating, and identifying bioactive chemicals from plant extracts, highlighting advances and problems in this field. The first stage in acquiring bioactive chemicals from plant sources is extraction. Maceration, infusion, decoction, solvent extraction, supercritical fluid extraction, and microwave-assisted extraction are among the extraction procedures used. These approaches strive to extract the target molecules as efficiently as possible while keeping their chemical integrity and bioactivity.

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Susa, Francesca, e Roberto Pisano. "Advances in Ascorbic Acid (Vitamin C) Manufacturing: Green Extraction Techniques from Natural Sources". Processes 11, n. 11 (6 novembre 2023): 3167. http://dx.doi.org/10.3390/pr11113167.

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Ascorbic acid (AA), or vitamin C, is one of the most important vitamins consumed through the diet due to its critical role in many biological processes. Although the human body cannot synthesize it, AA is essential in maintaining healthy bodily structure, acting as a cofactor of many enzymes involved in collagen synthesis and an efficient immune system. At the same time, AA is used in the cosmetic field for its antioxidant and antipigmentary properties, in the food industry as additive, and in chemical synthesis as reducing agent. AA can be chemically synthesized, produced by the oxidative fermentation of bacteria, or extracted from natural sources. This review addresses the most recent developments in its manufacture, including techniques for extracting vitamin C from plants, fruits, vegetables, algae, and leaves, and focusing on the most commonly used green methods, i.e., ultrasound-assisted extraction, microwave-assisted extraction, pressurized liquid extraction, and supercritical fluid extraction. These methods are based on mild extraction conditions, environmentally friendly solvents, low time, cost, and energy consumption. In contrast, their extraction yields are comparable to or even higher than those of conventional methods.

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Lu, Meng-Shan, Long-Li Lai e Yung-Pin Tsai. "COMPARISON OF OPTIMUM CONDITIONS WHEN EXTRACTING PHAS FROM DIFFERENT WASTE SLUDGE SOURCES". Journal of Environmental Engineering and Landscape Management 26, n. 3 (9 ottobre 2018): 190–94. http://dx.doi.org/10.3846/16486897.2017.1411271.

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Biological wastewater treatment plants produce great amounts of sludge daily. It is a very big loading (cost) for treating the waste sludge. Polyhydroxyalkanoates are a family of polyhydroxyesters. The technologies of extracting PHAs from wasted sewage sludges of municipal wastewater, fermentation industry and husbandry were developed in the study. In the NaOCl/SDS extraction technology, the concentration of NaOCl and liquid-solid ratio are two essential factors directly influencing extraction efficiency. The experimental results verified under the optimal conditions for extracting PHAs, the content of recovered PHAs was 44.2±0.89 mgPHA/gVSS and the purity of recovered PHAs was >99.5 wt% for the waste sludge from municipal wastewater treatment plants. For fermentation industry sludge, under the adequate extraction conditions for PHAs recovery, the content and purity of recovered PHAs were 18.8±0.66 mgPHA/gVSS and 50.6±6.83 wt%, respectively. For husbandry sludge, the content and purity of recovered PHAs were 33.7±0.16 mgPHA/gVSS and 76.7±5.2 wt%, respectively.

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A, Premkumar, e Saisangeetha JV. "Review on Natural Dye and Methods of Dye Extraction from Natural Sources". International Journal of Science and Research (IJSR) 11, n. 5 (5 maggio 2022): 1332–35. http://dx.doi.org/10.21275/sr22515010610.

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Gordalina, Mariana, Helena M. Pinheiro, Marília Mateus, M. Manuela R. da Fonseca e M. Teresa Cesário. "Macroalgae as Protein Sources—A Review on Protein Bioactivity, Extraction, Purification and Characterization". Applied Sciences 11, n. 17 (28 agosto 2021): 7969. http://dx.doi.org/10.3390/app11177969.

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The increased demand for protein sources combined with a decrease in the available land and water resources have led to a growing interest in macroalgae as alternative protein sources. This review focuses on strategies for macroalgae protein extraction, enrichment and characterization. To date, the protein extraction methods applied to algae include enzymatic hydrolysis, physical processes and chemical extraction. Novel methods, such as pulsed electric field, microwave-assisted, pressurized liquid and supercritical fluid extractions, and the application of smart solvents are discussed. An overview of the use of membranes and other processes to generate high-value protein concentrates from algae extracts is also presented, as well as some examples of the methods used for their characterization. The potential bioactivities from macroalgae-derived proteins and peptides, including novel glycoproteins and lectins, are briefly reviewed.

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Ramaswamy, Ramya, e Sivaneasan Bala Krishnan. "Pulsed Electric Field Treatment in Extracting Proteins from Legumes: A Review". Processes 12, n. 12 (26 novembre 2024): 2667. http://dx.doi.org/10.3390/pr12122667.

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A healthy diet rich in plant proteins can help in preventing chronic degenerative diseases. Plant-based protein consists of derivatives from algae, fungi (like mushrooms) and other plant products including stems, leaves, fruits, vegetables, grains, seeds, legumes and nuts. These sources are not only rich in protein, but also contain a high percentage of iron, calcium, folates, fiber, carbohydrates, fats etc. Hence, it is essential to explore plant-based protein sources and their other nutritional components to address existing food insecurity issues. Nowadays, the impact of food processing has produced promising results in extracting valuable bio-compounds including proteins from the plant matrix. In this view, PEF technology has secured an exceptional place in solving food quality issues through minimized thermal effects in the samples, improved extraction capabilities at a shorter time, higher extraction levels, high nutritional content of extracted samples, greater shelf-life extension and increased microbial killing efficiency. It is an energy efficient process which is used as a pre-treatment to increase selective extraction of intracellular compounds through electroporation technique. Here, the processing parameters play a significant role in obtaining enhanced extraction levels. These parameters have also considerably influenced the protein digestibility and amino acid modification. So far, PEF has been producing remarkable results in plant protein extraction research. Among various plant sources mentioned above, there is a limited literature available on the use of PEF-assisted protein extraction from legumes. In this review, the authors have discussed essential legumes and their nutritional components and have highlighted how PEF can be beneficial in extracting the protein levels from these sources. Further research should focus on PEF-assisted protein extraction from legumes, specifically analyzing the properties of protein quality and quantity.

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Ullah, Samee, Anees Ahmed Khalil, Faryal Shaukat e Yuanda Song. "Sources, Extraction and Biomedical Properties of Polysaccharides". Foods 8, n. 8 (1 agosto 2019): 304. http://dx.doi.org/10.3390/foods8080304.

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In the recent era, bioactive compounds from plants have received great attention because of their vital health-related activities, such as antimicrobial activity, antioxidant activity, anticoagulant activity, anti-diabetic activity, UV protection, antiviral activity, hypoglycemia, etc. Previous studies have already shown that polysaccharides found in plants are not likely to be toxic. Based on these inspirational comments, most research focused on the isolation, identification, and bioactivities of polysaccharides. A large number of biologically active polysaccharides have been isolated with varying structural and biological activities. In this review, a comprehensive summary is provided of the recent developments in the physical and chemical properties as well as biological activities of polysaccharides from a number of important natural sources, such as wheat bran, orange peel, barely, fungi, algae, lichen, etc. This review also focused on biomedical applications of polysaccharides. The contents presented in this review will be useful as a reference for future research as well as for the extraction and application of these bioactive polysaccharides as a therapeutic agent.

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15

Yuanqing Li e Jun Wang. "Sequential blind extraction of instantaneously mixed sources". IEEE Transactions on Signal Processing 50, n. 5 (maggio 2002): 997–1006. http://dx.doi.org/10.1109/78.995057.

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Spädtke, P., F. Heymach, R. Hollinger, K. D. Leible, R. Mayr e L. Q. Shi. "Accel–decel extraction system for PIG sources". Review of Scientific Instruments 73, n. 2 (febbraio 2002): 723–25. http://dx.doi.org/10.1063/1.1430866.

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Tokiguchi, K., N. Sakudo e H. Koike. "Beam extraction experiments from microwave ion sources". Review of Scientific Instruments 57, n. 8 (agosto 1986): 1526–30. http://dx.doi.org/10.1063/1.1138580.

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Bacal, M., A. Hatayama, T. Matsumiya, M. Hamabe, T. Kuroda e Y. Oka. "Extraction physics in volume H−-ion sources". Review of Scientific Instruments 77, n. 3 (marzo 2006): 03A502. http://dx.doi.org/10.1063/1.2149367.

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Oroian, Mircea, e Isabel Escriche. "Antioxidants: Characterization, natural sources, extraction and analysis". Food Research International 74 (agosto 2015): 10–36. http://dx.doi.org/10.1016/j.foodres.2015.04.018.

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Gadkari, Pravin Vasantrao, e Manohar Balaraman. "Catechins: Sources, extraction and encapsulation: A review". Food and Bioproducts Processing 93 (gennaio 2015): 122–38. http://dx.doi.org/10.1016/j.fbp.2013.12.004.

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21

Graciela, Callejas-Quijada, Escobar-Chávez José Juan, Campos-Lozada Gieraldin, Pérez-Marroquín Xóchitl Alejandra e Aguirre-Álvarez Gabriel. "Hyaluronic Acid. Extraction Methods, Sources and Applications". Polymers 15, n. 16 (19 agosto 2023): 3473. http://dx.doi.org/10.3390/polym15163473.

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In this review, a compilation of articles in databases on the extraction methods and applications of hyaluronic acid (HA) was carried out. HA is a highly hydrated component of different tissues, including connective, epithelial, and neural. It is an anionic, linear glycosaminoglycan (GAG) primarily found in the native extracellular matrix (ECM) of soft connective tissues. Included in the review were studies on the extraction methods (chemical, enzymatical, combined) of HA, describing advantages and disadvantages as well as news methods of extraction. The applications of HA in food are addressed, including oral supplementation, biomaterials, medical research, and pharmaceutical and cosmetic industry applications. Subsequently, we included a section related to the structure and penetration routes of the skin, with emphasis on the benefits of systems for transdermal drug delivery nanocarriers as promoters of percutaneous absorption. Finally, the future trends on the applications of HA were included. This final section contains the effects before, during, and after the application of HA-based products.

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Fanani Hidayatulloh, Ahmat, e Aman Santoso. "Eco-Friendly Methods of Silica Extraction from Pyrophyllite Rocks Using Sol-Gel versus Alkali Fusion Method". E3S Web of Conferences 481 (2024): 05001. http://dx.doi.org/10.1051/e3sconf/202448105001.

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Silica is the most abundant compound on the Earth’s surface. The content of silica can be found in agricultural waste ash and mineral rocks. Extracting silica from natural sources is advantageous due to its economic feasibility and easily obtained. Silica has a wide range of applications, such as in fertilizers, adsorbents, organic reaction catalysis, biofuels/alternative energy production, and as an antimicrobial agent. One type of rock that contains the highest amount of silica is Pyrophyllite. Recent research trends have focused on various methods and sources for silica extraction, yet extracting silica from mineral rocks presents its own challenges. Pyrophyllite rock contains a high amount of silica, but its extraction is quite difficult due to the presence of crystalline silicate mineral phases. This study aims to compare the silica extraction process on Pyrophyllite rocks from Malang using the sol-gel method versus the alkali fusion method.

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Inguanez, Lara, Xianglu Zhu, Jefferson de Oliveira Mallia, Brijesh K. Tiwari e Vasilis P. Valdramidis. "Extractions of Protein-Rich Alaria esculenta and Lemna minor by the Use of High-Power (Assisted) Ultrasound". Sustainability 15, n. 10 (15 maggio 2023): 8024. http://dx.doi.org/10.3390/su15108024.

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Plant nutrients extracted from sustainable sources, namely Alaria esculenta and Lemna minor, have been evaluated for their nutritional value in an attempt to identify their potential as protein-rich sources. The implementation of green technologies such as high-power ultrasound to extract nutrients from these alternative biomasses was studied and compared to more traditional techniques. Probe sonicators fared better than bath sonicators in extracting bioactive compounds while ultrasound assisted with enzymes was more efficient than conventional or alkali extraction methods. Lemna minor was found to have the greatest extraction yield of nutrients.

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Junior, Mário Roberto Maróstica, Alice Vieira Leite e Nathalia Romanelli Vicente Dragano. "Supercritical Fluid Extraction and Stabilization of Phenolic Compounds From Natural Sources – Review (Supercritical Extraction and Stabilization of Phenolic Compounds)". Open Chemical Engineering Journal 4, n. 1 (25 marzo 2010): 51–60. http://dx.doi.org/10.2174/1874123101004010051.

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Phenolic compounds are components commonly found in fruits and vegetables. Recently, they have been subject of considerable scientific and therapeutic interest mainly due to their antioxidant properties and related healthpromoting benefits, as confirmed by the numerous papers devoted to various properties of these compounds. Thus, the extractions of phenolic compounds with functional properties from natural sources have attracted special interests. Supercritical fluid extraction offers a number of advantages over conventional extraction methods above all in relation to the conditions employed during the extraction process that ensures minimal alteration of the active phenolics and the healing properties could be more easily preserved. This work provides an updated overview on the principal applications of Supercritical fluid extraction in recovery of bioactive phenolics emphasizing the effects of temperature, pressure, addition of co-solvents and time on the extraction yield of these compounds and their antioxidant activities for a possible applications in food, cosmetic or pharmaceutical industries.

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Liao, Lele, Guoliang Cheng, Zhaoyi Gu e Jing Lu. "Efficient independent vector extraction of dominant source (L)". Journal of the Acoustical Society of America 151, n. 6 (giugno 2022): 4126–30. http://dx.doi.org/10.1121/10.0011746.

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The complete decomposition performed by blind source separation is computationally demanding and superfluous when only the speech of one specific target speaker is desired. This letter proposes a computationally efficient blind source extraction method based on the fast fixed-point optimization algorithm under the mild assumption that the average power of the source of interest outweighs the interfering sources. Moreover, a one-unit scaling operation is designed to solve the scaling ambiguity for source extraction. Experiments validate the efficacy of the proposed method in extracting the dominant source.

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Rodriguez-Marquez, Carlos Dariel, Susana Arteaga-Marin, Andrea Rivas-Sánchez, Renata Autrique-Hernández e Roberto Castro-Muñoz. "A Review on Current Strategies for Extraction and Purification of Hyaluronic Acid". International Journal of Molecular Sciences 23, n. 11 (27 maggio 2022): 6038. http://dx.doi.org/10.3390/ijms23116038.

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Since it is known that hyaluronic acid contributes to soft tissue growth, elasticity, and scar reduction, different strategies of producing HA have been explored in order to satisfy the current demand of HA in pharmaceutical products and formulations. The current interest deals with production via bacterial and yeast fermentation and extraction from animal sources; however, the main challenge is the right extraction technique and strategy since the original sources (e.g., fermentation broth) represent a complex system containing a number of components and solutes, which complicates the achievement of high extraction rates and purity. This review sheds light on the main pathways for the production of HA, advantages, and disadvantages, along with the current efforts in extracting and purifying this high-added-value molecule from different sources. Particular emphasis has been placed on specific case studies attempting production and successful recovery. For such works, full details are given together with their relevant outcomes.

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Wu, Sean F., e Na Zhu. "Blind extraction and localization of sound sources using point sources based approaches". Journal of the Acoustical Society of America 132, n. 2 (agosto 2012): 904–17. http://dx.doi.org/10.1121/1.4726072.

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Et.al, Mahyuddin K. M. Nasution. "Social Network Extraction Unsupervised". Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, n. 3 (11 aprile 2021): 4443–49. http://dx.doi.org/10.17762/turcomat.v12i3.1824.

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In the era of information technology, the two developing sides are data science and artificial intelligence. In terms of scientific data, one of the tasks is the extraction of social networks from information sources that have the nature of big data. Meanwhile, in terms of artificial intelligence, the presence of contradictory methods has an impact on knowledge. This article describes an unsupervised as a stream of methods for extracting social networks from information sources. There are a variety of possible approaches and strategies to superficial methods as a starting concept. Each method has its advantages, but in general, it contributes to the integration of each other, namely simplifying, enriching, and emphasizing the results.

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Rahim, Muhammad Abdul, Hudda Ayub, Aqeela Sehrish, Saadia Ambreen, Faima Atta Khan, Nizwa Itrat, Anum Nazir et al. "Essential Components from Plant Source Oils: A Review on Extraction, Detection, Identification, and Quantification". Molecules 28, n. 19 (29 settembre 2023): 6881. http://dx.doi.org/10.3390/molecules28196881.

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Oils derived from plant sources, mainly fixed oils from seeds and essential oil from other parts of the plant, are gaining interest as they are the rich source of beneficial compounds that possess potential applications in different industries due to their preventive and therapeutic actions. The essential oils are used in food, medicine, cosmetics, and agriculture industries as they possess antimicrobial, anticarcinogenic, anti-inflammatory and immunomodulatory properties. Plant based oils contain polyphenols, phytochemicals, and bioactive compounds which show high antioxidant activity. The extractions of these oils are a crucial step in terms of the yield and quality attributes of plant oils. This review paper outlines the different modern extraction techniques used for the extraction of different seed oils, including microwave-assisted extraction (MAE), pressurized liquid extraction (PLE), cold-pressed extraction (CPE), ultrasound-assisted extraction (UAE), supercritical-fluid extraction (SFE), enzyme-assisted extraction (EAE), and pulsed electric field-assisted extraction (PEF). For the identification and quantification of essential and bioactive compounds present in seed oils, different modern techniques—such as high-performance liquid chromatography (HPLC), gas chromatography–mass spectrometry (GC-MS), Fourier transform infrared spectroscopy (FTIR), gas chromatography–infrared spectroscopy (GC-IR), atomic fluorescence spectroscopy (AFS), and electron microscopy (EM)—are highlighted in this review along with the beneficial effects of these essential components in different in vivo and in vitro studies and in different applications. The primary goal of this research article is to pique the attention of researchers towards the different sources, potential uses and applications of oils in different industries.

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Sabri, Ily Amalina Ahmad, e Mustafa Man. "A performance of comparative study for semi-structured web data extraction model". International Journal of Electrical and Computer Engineering (IJECE) 9, n. 6 (1 dicembre 2019): 5463. http://dx.doi.org/10.11591/ijece.v9i6.pp5463-5470.

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<span lang="EN-US">The extraction of information from multi-sources of web is an essential yet complicated step for data analysis in multiple domains. In this paper, we present a data extraction model based on visual segmentation, DOM tree and JSON approach which is known as Wrapper Extraction of Image using DOM and JSON (WEIDJ) for extracting semi-structured data from biodiversity web. The large number of information from multiple sources of web which is image’s information will be extracted using three different approach; Document Object Model (DOM), Wrapper image using Hybrid DOM and JSON (WHDJ) and Wrapper Extraction of Image using DOM and JSON (WEIDJ). Experiments were conducted on several biodiversity website. The experiment results show that WEIDJ approach promising results with respect to time analysis values. WEIDJ wrapper has successfully extracted greater than 100 images of data from the multi-source web biodiversity of over 15 different websites.</span>

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Afifah, Amalia, Ono Suparno, Liesbetini Haditjaroko, Kustiariyah Tarman, Agus Setiyono e Aditya Wahyu Nugraha. "Isolation and Characterization of Collagen from Salmon Skin (Salmo Salar) using Acid Method". Squalen Bulletin of Marine and Fisheries Postharvest and Biotechnology 18, n. 2 (31 agosto 2023): 139–47. http://dx.doi.org/10.15578/squalen.756.

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Collagen is a type of protein that is plentiful and has a wide variety of applications. Collagen is often derived from porcine and bovine, however, both sources are considered to transmit disease, particularly porcine sources, which haram to Moslem. There are some methods for collagen extraction, on of them using acid method. The purpose of this study was to obtain the best method of extraction and analyze collagen from alternative sources, specifically salmon skin, which is abundant. This study included two stages, i.e. pretreatment with sodium hydroxide for eliminating non-collagen proteins prior from salmon skin and extraction with acetic acid for collagen extraction. Pretreatment was carried out utilizing a split-plot design with parameters for determining the levels of non-collagen protein. The extraction step used a factorial completely randomized design to observe yields, amino acids, functional groups, and molecular weights. The results indicated that the extract was collagen. It was indicated by high glycine, alanine, and proline amino acid content. The result of SDS-PAGE showed the extracted was type I collagen was characterized by two identical 1 chains and one similar, but 2 different chains. The propeptides of type I procollagen have a similar composition. The most effective method for eliminating non-collagen proteins prior to extracting collagen from salmon skin was pretreatment with a 0.05 M NaOH solution for 10 hours. Collagen extraction using acetic acid at concentration of 0.5 M for 48 hours resulted in a yield of 12.79%.

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Usman, Muhammad, Mayuko Nakagawa e Shuo Cheng. "Emerging Trends in Green Extraction Techniques for Bioactive Natural Products". Processes 11, n. 12 (16 dicembre 2023): 3444. http://dx.doi.org/10.3390/pr11123444.

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This review explores eco-friendly methods for extracting bioactive natural products from diverse sources. The introductory exploration emphasizes the increasing demand for sustainable extraction methods, with a focus on the environmental impact of conventional approaches. Addressing existing knowledge gaps, this review outlines the key objectives of evaluating various green extraction technologies, including supercritical fluid extraction, pressurized liquid extraction, ultrasound-assisted extraction, enzyme-assisted extraction, and others. The primary findings underscore the remarkable potential and advancements achieved with green solvents, specifically deep eutectic solvents and bio-based solvents. This review elucidates the synergistic effects achieved by combining different extraction techniques, exemplified by ultrasound-microwave-assisted extraction and sequential supercritical fluid and pressurized liquid extraction, among others. Notwithstanding the promising results, this review emphasizes the importance of acknowledging and addressing challenges such as standardization, selectivity, scalability, and economic viability.

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Woolfson, M. S., C. Bigan, J. A. Crowe e B. R. Hayes-Gill. "Extraction of Correlated Sparse Sources from Signal Mixtures". ISRN Signal Processing 2013 (13 febbraio 2013): 1–17. http://dx.doi.org/10.1155/2013/218651.

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A blind source separation method is described to extract sources from data mixtures where the underlying sources are sparse and correlated. The approach used is to detect and analyze segments of time where one source exists on its own. The method does not assume independence of sources and probability density functions are not assumed for any of the sources. A comparison is made between the proposed method and the Fast-ICA and Clusterwise PCA methods. It is shown that the proposed method works best for cases where the underlying sources are strongly correlated because Fast-ICA assumes zero correlation between sources and Clusterwise PCA can be sensitive to overlap between sources. However, for cases of sources that are sparse and weakly correlated with each other, there is a tendency for Fast-ICA and Clusterwise PCA to have better performances than the proposed method, the reason being that these methods appear to be more robust to changes in input parameters to the algorithms. In addition, because of the deflationary nature of the proposed method, there is a tendency for estimates to be more affected by noise than Fast-ICA when the number of sources increases. The paper concludes with a discussion concerning potential applications for the proposed method.

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Hickey, Daniel T., Daniel J. Hayes, J. Tony Pembroke, Michael P. Ryan e James J. Leahy. "The Importance of Extraction Protocol on the Analysis of Novel Waste Sources of Lignocellulosic Biomass". Energies 14, n. 19 (7 ottobre 2021): 6406. http://dx.doi.org/10.3390/en14196406.

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As the utilization and consumption of lignocellulosic biomass increases, so too will the need for an adequate supply of feedstock. To meet these needs, novel waste feedstock materials will need to be utilized. Exploitation of these novel feedstocks will require information both on the effects of solvent extraction on the succeeding analysis of potential novel feedstocks and how accurate current methodologies are in determining the composition of novel lignocellulosic feedstocks, particularly the carbohydrate and lignin fractions. In this study, the effects of solvent extraction on novel feedstocks, including tree foliage, tree bark and spent mushroom compost, with 95% ethanol, water and both sequentially were examined. Chemical analyses were carried out to determine the moisture content, ash, extractives, post-hydrolysis sugars, Klason lignin (KL) and acid-soluble lignin (ASL) within the selected feedstocks. The result of extraction could be seen most strongly for Klason lignin, with a strong association between higher levels of Klason lignin levels and greater amounts of non-removed extractives (tree foliage and bark). Higher Klason lignin levels are reported to be due the condensation of non-removed extractives during hydrolysis, hence the lower Klason lignin determinations following extraction are more exact. In addition, total sugar determinations were lower following extractions. This is because of the solubility of non-cell-wall carbohydrates; thus, the determinations following extraction are more accurate representations of structural cell-wall polysaccharides such as cellulose. Such determinations will assist in determining the best way to utilize novel feedstocks such as those analyzed in this work.

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Wall, Jeffrey D., e Rahul Singh. "Contextualized Meaning Extraction". International Journal of Organizational and Collective Intelligence 7, n. 3 (luglio 2017): 15–29. http://dx.doi.org/10.4018/ijoci.2017070102.

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Text mining is a powerful form of business intelligence that is used increasingly to inform organizational decisions. Current text mining algorithms rely heavily on the lexical, syntactic, structural, and semantic features of text to extract meaning and insight for decision making. Although semantic analysis is a useful approach to meaning extraction, pragmatics suggests that a more accurate meaning of text can be extracted by examining the context in which the text is recorded. Given that massive amounts of textual data can be drawn from multiple and diverse sources, accounting for context is increasingly important. A conceptual model is provided to explain how concepts from pragmatics can improve existing text mining algorithms to provide more accurate information for decision making. Reversing the pragmatic process of meaning expression could lead to improved text mining algorithms. The theoretical process model developed herein can provide insight into the development and refinement of text mining algorithms that draw from diverse sources.

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Uwineza, Pascaline Aimee, e Agnieszka Waśkiewicz. "Recent Advances in Supercritical Fluid Extraction of Natural Bioactive Compounds from Natural Plant Materials". Molecules 25, n. 17 (24 agosto 2020): 3847. http://dx.doi.org/10.3390/molecules25173847.

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In this review, recent advances in greener technology for extracting natural bioactive components from plant origin sources are discussed. Bioactive compounds of plant origin have been defined as natural chemical compounds present in small amounts in plants. Researchers have shown interest in extracting bioactive compounds because of their human health benefits and characteristics of being eco-friendly and generally recognized as safe. Various new extraction methods and conventional extraction methods have been developed, however, until now, no unique approach has been presented as a benchmark for extracting natural bioactive compounds from plants. The selectivity and productivity of traditional and modern extraction techniques generally depend on selecting the critical input parameters, knowing the nature of plant-based samples, the structure of bioactive compounds, and good scientific skills. This work aims to discuss the recent advances in supercritical fluid extraction techniques, especially supercritical carbon dioxide, along with the fundamental principles for extracting bioactive compounds from natural plant materials such as herbs, spices, aromatic and medicinal plants.

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Aguilera, Yolanda, e Vanesa Benítez. "Phytochemicals: Dietary Sources, Innovative Extraction, and Health Benefits". Foods 11, n. 1 (29 dicembre 2021): 72. http://dx.doi.org/10.3390/foods11010072.

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Redondo-Cuenca, Araceli, Selene Elizabeth Herrera-Vázquez, Luis Condezo-Hoyos, Eva Gómez-Ordóñez e Pilar Rupérez. "Inulin extraction from common inulin-containing plant sources". Industrial Crops and Products 170 (ottobre 2021): 113726. http://dx.doi.org/10.1016/j.indcrop.2021.113726.

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García, Ramiro, Antonio Aguilera, Juan C. Contreras-Esquivel, Raúl Rodríguez e Cristóbal N. Aguilar. "Extraction of Condensed Tannins from Mexican Plant Sources". Zeitschrift für Naturforschung C 63, n. 1-2 (1 febbraio 2008): 17–20. http://dx.doi.org/10.1515/znc-2008-1-204.

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Contents of total polyphenols, condensed tannins and proanthocyanidins, and their stability to various pH values and temperatures were studied in Mexican blueberry, cuautecomate fruit, garambullo fruit, aubergine, coffee pulp and residues of black grapes. Several aqueous extracts, obtained through a one-pass-extraction process, were analyzed using liquid chromatography in order to quantify the condensed tannin (proanthocyanidin) content responsible for their antioxidant activity and colour. All tested samples included high proanthocyanidin contents demonstrating that these Mexican fruits and vegetables are good sources of natural antioxidants, and they all could be considered as excellent functional foods due to their bioactivity measured as the condensed tannin level.

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Lozano-Grande, M. Azalia, Shela Gorinstein, Eduardo Espitia-Rangel, Gloria Dávila-Ortiz e Alma Leticia Martínez-Ayala. "Plant Sources, Extraction Methods, and Uses of Squalene". International Journal of Agronomy 2018 (1 agosto 2018): 1–13. http://dx.doi.org/10.1155/2018/1829160.

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Squalene (SQ) is a natural compound, a precursor of various hormones in animals and sterols in plants. It is considered a molecule with pharmacological, cosmetic, and nutritional potential. Scientific research has shown that SQ reduces skin damage by UV radiation, LDL levels, and cholesterol in the blood, prevents the suffering of cardiovascular diseases, and has antitumor and anticancer effects against ovarian, breast, lung, and colon cancer. The inclusion of SQ in the human diet is recommended without causing health risks; however, its intake is low due to the lack of natural sources of SQ and efficient extraction methods which limit its commercialization. Biotechnological advances have developed synthetic techniques to produce SQ; nevertheless, yields achieved are not sufficient for global demand for industrial or food supplement purposes. The effect on the human body is one of the scientific issues still to be addressed; few research studies have been developed with SQ from seed or vegetable sources to use it in the food sector even though squalene was discovered more than half a century ago. The aim of this review is to provide an overview of SQ to establish research focus with special reference to plant sources, extraction methods, and uses.

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Wang, Niannian, Feifei Zhu e Keping Chen. "1-Deoxynojirimycin: Sources, Extraction, Analysis and Biological Functions". Natural Product Communications 12, n. 9 (settembre 2017): 1934578X1701200. http://dx.doi.org/10.1177/1934578x1701200934.

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1-Deoxynojirimycin (DNJ), a natural polyhydroxylated piperidine alkaloid, is attracting growing attention due to its important biological functions. This paper introduces the discovery and origins of DNJ, its extraction, purification, and physiological functions in the treatment of diabetes. The mechanisms of DNJ in the inhibition of fat accumulation and tumor cell metastasis are also discussed. In addition, the prospects and challenges of DNJ for practical production are proposed. This work aims to provide technical advice on obtaining DNJ and a fuller understanding of its biological activities.

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Bronzi, Mirko, Valter Crescenzi, Paolo Merialdo e Paolo Papotti. "Extraction and integration of partially overlapping web sources". Proceedings of the VLDB Endowment 6, n. 10 (26 agosto 2013): 805–16. http://dx.doi.org/10.14778/2536206.2536209.

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Whealton, J. H., P. S. Meszaros, R. J. Raridon e K. E. Rothe. "Extraction‐induced emittance growth for negative‐ion sources". Review of Scientific Instruments 61, n. 1 (gennaio 1990): 436–38. http://dx.doi.org/10.1063/1.1141265.

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Coste, Ph, J. Aubert, A. Farchi, C. Lejeune e L. Wartski. "Beam extraction from ion sources with electrostatic containment". Review of Scientific Instruments 63, n. 4 (aprile 1992): 2762–64. http://dx.doi.org/10.1063/1.1142797.

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Leroy, R., J. Mandin, P. Bertrand, N. Lecesne, J. Y. Pacquet, E. Robert, P. Sortais e A. C. C. Villari. "Extraction studies on electron cyclotron resonance ion sources". Review of Scientific Instruments 67, n. 3 (marzo 1996): 1350–52. http://dx.doi.org/10.1063/1.1146662.

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Mendez, J. D., Heather Johnson, Jordan McQueen e J. W. Clack. "Optimizing the Extraction of Chitin from Underutilized Sources". Journal of Chitin and Chitosan Science 3, n. 1 (1 marzo 2015): 77–80. http://dx.doi.org/10.1166/jcc.2015.1083.

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Sarıkoz, Serdar Kürşat. "Examining Knowledge Extraction Processes from Heterogeneous Data Sources". Brilliant Engineering 4, n. 1 (8 febbraio 2023): 1–8. http://dx.doi.org/10.36937/ben.2023.4798.

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Abstract (sommario):

In the last 20 years, e-mail, instant messaging, documents, blogs, news, text communication in the transfer of information over the web, as a result of the presentation and transmission of information as a result of the Web the dramatic increase in the amount of data in digital environments has increased the importance of studies in the field of knowledge extraction from unstructured data. Since the 2000s, one of the primary goals of researchers in the field of artificial intelligence has been to extract knowledge from heterogeneous data sources on the World Wide Web, including real-life entities and semantic relationships between entities, and to display them in machine-readable format. Advances in natural language processing and information extraction have increased the importance of large-scale knowledge bases in complex applications, resulting in scalable information extraction from semi-structured and unstructured heterogeneous data sources on the Web, and the detection of entities and relationships; It enabled the automatic creation of prominent knowledge bases in this field such as DbPedia, YAGO, NELL, Freebase, Probase, Google Knowledge Vault, IBM Watsons, which contain millions of semantic relationships between hundreds of thousands of entities, and displaying the created information in machine-readable format. Within the scope of this article; Web-scale(end-to-end) knowledge extraction from heterogeneous data sources, methods, challenges and opportunities are provided.

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Laroze, Liza, e Maria Elvira Zuniga-Hansen. "Phenolic antioxidant extraction from selected agroindustrial residual sources". Journal of Biotechnology 131, n. 2 (settembre 2007): S193—S194. http://dx.doi.org/10.1016/j.jbiotec.2007.07.344.

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Noorzai, Safiya, Casparus Johannes Reinhard Verbeek, Mark Christopher Lay e Janis Swan. "Collagen Extraction from Various Waste Bovine Hide Sources". Waste and Biomass Valorization 11, n. 11 (2 novembre 2019): 5687–98. http://dx.doi.org/10.1007/s12649-019-00843-2.

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N, Adharsh Ashok, e Manmath Sontakke. "Plant-based emulsifiers: Sources, extraction, properties and applications". Pharma Innovation 12, n. 5 (1 maggio 2023): 08–16. http://dx.doi.org/10.22271/tpi.2023.v12.i5a.20043.

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