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Статті в журналах з теми "Molecules - Industrial Interest"
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Gomes dos Santos, Tiago, Geovânia Cordeiro de Assis, Antonio Osimar Sousa da Silva, and Simoni Margareti Plentz Meneghetti. "Sn Species as a Potential Catalyst in Fructose Conversion in Molecules of Industrial Interest." Revista Virtual de Química 13, no. 2 (2021): 480–93. http://dx.doi.org/10.21577/1984-6835.20200156.
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Remonatto, Daniela, and Lindomar Alberto Lerin. "Biocatalysis and Bioactive Molecules: Future and Development." International Journal of Molecular Sciences 24, no. 6 (March 14, 2023): 5571. http://dx.doi.org/10.3390/ijms24065571.
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Nitschke, Marcia, Siddhartha G. V. A. O. Costa, and Jonas Contiero. "Rhamnolipids and PHAs: Recent reports on Pseudomonas-derived molecules of increasing industrial interest." Process Biochemistry 46, no. 3 (March 2011): 621–30. http://dx.doi.org/10.1016/j.procbio.2010.12.012.
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Andres, C. J., Derek J. Denhart, Milind S. Deshpande, and Kevin W. Gillman. "Recent Advances in the Solid Phase Synthesis of Drug Heterocyclic Small Molecules." Combinatorial Chemistry & High Throughput Screening 2, no. 4 (August 1999): 191–210. http://dx.doi.org/10.2174/1386207302666220204193145.
Повний текст джерелаАнотація:
Abstract: Because of their synthetic challenge, broad range of physical I chemical properties, and diverse biological activities, heterocycles continue to be of interest to both the academic and industrial chemist. This review covers recent advances in the solid phase synthesis of drug-like heterocyclic small molecules. Syntheses which form the heterocycle on the solid phase are emphasized; syntheses in which a preformed heterocycle is functionalized on the solid support have been omitted. The majority of references are from publication year 1999. This review should be of interest to anyone involved in, or contemplating the solid phase synthesis of small molecule drug-like heterocycles, especially for combinatorial chemistry applications.
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Achar, Tapas Kumar, Anima Bose, and Prasenjit Mal. "Mechanochemical synthesis of small organic molecules." Beilstein Journal of Organic Chemistry 13 (September 11, 2017): 1907–31. http://dx.doi.org/10.3762/bjoc.13.186.
Повний текст джерелаАнотація:
With the growing interest in renewable energy and global warming, it is important to minimize the usage of hazardous chemicals in both academic and industrial research, elimination of waste, and possibly recycle them to obtain better results in greener fashion. The studies under the area of mechanochemistry which cover the grinding chemistry to ball milling, sonication, etc. are certainly of interest to the researchers working on the development of green methodologies. In this review, a collection of examples on recent developments in organic bond formation reactions like carbon–carbon (C–C), carbon–nitrogen (C–N), carbon–oxygen (C–O), carbon–halogen (C–X), etc. is documented. Mechanochemical syntheses of heterocyclic rings, multicomponent reactions and organometallic molecules including their catalytic applications are also highlighted.
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Kontaxakis, Emmanouil, Emmanouil Trantas, and Filippos Ververidis. "Resveratrol: A Fair Race Towards Replacing Sulfites in Wines." Molecules 25, no. 10 (May 20, 2020): 2378. http://dx.doi.org/10.3390/molecules25102378.
Повний текст джерелаАнотація:
In recent years, significant efforts to produce healthier wines has led to the replacement or reduction of the addition of sulfites, using alternative substances or techniques. Resveratrol and related biophenols seem to be of great interest, since beyond their protective nature and contrary to sulfites they can positively affect consumer health. These bioactive phytochemicals are naturally produced in grapes as evolutionary acquired mechanisms against pathogens and UV irradiation. However, despite the efforts made so far attempting to develop economic and industrially adopted isolation techniques, available quantities of these biophenols for commercial use are still quite limited. Therefore, such molecules are still not able to meet the needs of industrial use due to their prohibitive marketable cost. In this review we summarize the efforts that have been made to biosynthesize these molecules through alternative, innovative ways. Increasing interest in modern biotechnological approaches has shed light on the exploitation of metabolically engineered microbial factories, instead of plants, to produce molecules of industrial interest. Such approaches, also reviewed here, are expected to lower the cost and appear promising to produce enough surplus to attract further oenological experimentation upon yielding functional wines. This development is expected to attract further industrial attention, continuing the race to partially or totally replace the external addition of sulfites. We also review important physicochemical properties of resveratrol in relation to enriching wines.
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Valencia-Hernandez, Leidy Johana, Jorge E. Wong-Paz, Juan Alberto Ascacio-Valdés, Mónica L. Chávez-González, Juan Carlos Contreras-Esquivel, and Cristóbal N. Aguilar. "Procyanidins: From Agro-Industrial Waste to Food as Bioactive Molecules." Foods 10, no. 12 (December 20, 2021): 3152. http://dx.doi.org/10.3390/foods10123152.
Повний текст джерелаАнотація:
Procyanidins are an important group of bioactive molecules known for their benefits to human health. These compounds are promising in the treatment of chronic metabolic diseases such as cancer, diabetes, and cardiovascular disease, as they prevent cell damage related to oxidative stress. It is necessary to study effective extraction methods for the recovery of these components. In this review, advances in the recovery of procyanidins from agro-industrial wastes are presented, which are obtained through ultrasound-assisted extraction, microwave-assisted extraction, supercritical fluid extraction, pressurized fluid extraction and subcritical water extraction. Current trends focus on the extraction of procyanidins from seeds, peels, pomaces, leaves and bark in agro-industrial wastes, which are extracted by ultrasound. Some techniques have been coupled with environmentally friendly techniques. There are few studies focused on the extraction and evaluation of biological activities of procyanidins. The identification and quantification of these compounds are the result of the study of the polyphenolic profile of plant sources. Antioxidant, antibiotic, and anti-inflammatory activity are presented as the biological properties of greatest interest. Agro-industrial wastes can be an economical and easily accessible source for the extraction of procyanidins.
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Delbecq, Frederic, and Christophe Len. "Recent Advances in the Microwave-Assisted Production of Hydroxymethylfurfural by Hydrolysis of Cellulose Derivatives—A Review." Molecules 23, no. 8 (August 7, 2018): 1973. http://dx.doi.org/10.3390/molecules23081973.
Повний текст джерелаАнотація:
The concepts of sustainable development, bioeconomy, and circular economy are being increasingly applied for the synthesis of molecules of industrial interest. Among these molecules, hydroxymethylfurfural as a platform molecule is the subject of various research approaches to improve its synthesis and productivity, and extend its potential uses. Accordingly, this review paper aims essentially at outlining recent breakthroughs obtained in the field of hydroxymethylfurfural production from sugars and polysaccharide feedstocks under microwave-assisted technology. The review discusses advances obtained via microwave activation in major production pathways recently explored, split into the following categories: (i) use of various homogeneous catalysts like mineral or organic acids, metal salts, or ionic liquids; (ii) feedstock dehydration making use of various solid acid catalysts; and (iii) non-catalytic routes.
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Crampon, Christelle, Olivier Boutin, and Elisabeth Badens. "Supercritical Carbon Dioxide Extraction of Molecules of Interest from Microalgae and Seaweeds." Industrial & Engineering Chemistry Research 50, no. 15 (August 3, 2011): 8941–53. http://dx.doi.org/10.1021/ie102297d.
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Cruz-Moreno, Byanka A., Ana Angélica Feregrino Pérez, Juan Fernando García-Trejo, Sergio Alfonso Pérez-García, and Claudia Gutiérrez-Antonio. "Identification of Secondary Metabolites of Interest in Pleurotus djamor Using Agave tequilana Bagasse." Molecules 28, no. 2 (January 5, 2023): 557. http://dx.doi.org/10.3390/molecules28020557.
Повний текст джерелаАнотація:
Agro-industrial residues represent more than 60% of organic wastes worldwide, which could be used to generate other by-products or to be incorporated into other production chains. For example, bagasse is a waste from the tequila industry in Mexico that could be implemented for mushroom cultivation. Additionally, the substrate influences the growth, development, and production of secondary metabolites of fungi. This work presents a comparative experiment that studies the metabolite production in Pleurotus djamor mushrooms on agave bagasse and barley straw (traditional substrate). The biological efficiency (BE), yield, phenolics and flavonoids, antioxidant capacity, tannins, and the identification of low molecular weight metabolites were evaluated. Five treatments were proposed according to the following mixtures of agave bagasse: barley straw: T1 (1:0), T2 (3:1), T3 (1:1), T4 (1:3), and T5 (0:1). T2 had the highest yield (13.39 ± 3.23%), BE (56.7 ± 13.71%), and flavonoids (44.25 mg rutin equivalent (RE)/g); T3 obtained the highest phenol content (230.27 mg GAE/g); and T1 the highest tannins content (0.23 mg (+) catechin equivalent (CE)/g). Finally, T1 and T5 are the ones that present the greatest number of primary metabolites, including hydroxycitric acid, 2-deoxy-D-galactose, D-mannose, paromomycin, palmitic acid, pyrrole, mannitol, and DL arabinose, while in T2, T3, and T4 only two chemical compounds were found present (palmitic acid and pyrrole in T2, silicic acid and pyrrole in T3 and 2-deoxy-D-galactose and quinoline in T4). The cultivation substrate influences the concentration of bioactive molecules in the fruiting bodies of P. djamor. Additionally, P. djamor’s degradation of agave bagasse residue generates a potential application for agro-industrial residue management at a low cost.
Дисертації з теми "Molecules - Industrial Interest"
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Pinto, Rui Montenegro Val-do-Rio. "Photoelectron spectroscopy of nitrogen containing molecules of biological and industrial interest." Doctoral thesis, Faculdade de Ciências e Tecnologia, 2011. http://hdl.handle.net/10362/7077.
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Milanezi, Natália von Gal. "Purificação e caracterização de uma endo-1,4-ß-xilanase produzida por Aspergillus niger com características de interesse industrial." reponame:Repositório Institucional da UnB, 2010. http://repositorio.unb.br/handle/10482/7160.
Повний текст джерелаАнотація:
Dissertação (mestrado)—Universidade de Brasília, Instituto de Ciências Biológicas, Departamento de Biologia Celular, 2010.Submitted by Washington da Silva Chagas (washington@bce.unb.br) on 2011-03-18T17:59:44Z No. of bitstreams: 1 2010_NataliavonGalMilanezi.pdf: 2529712 bytes, checksum: ea3fce7f0a6357dbc0a6e13f6705d142 (MD5)
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A holocelulose é o componente mais abundante da biomassa vegetal e é composto principalmente por celulose, hemicelulose e pectina. O bagaço de cana é o maior resíduo da agroindústria brasileira e é uma fonte de carbono economicamente viável para microrganismos produzirem enzimas holocelulolíticas de aplicação industrial. Os fungos filamentosos são eficientes produtores de xilanases, e suas enzimas têm sido utilizadas em todo o mundo em processos industriais. No presente estudo, uma xilanase (Xyl) do fungo Aspergillus niger crescido sobre bagaço de cana foi purificada e caracterizada visando a sua aplicação industrial. A curva de indução enzimática do fungo indicou alta atividade xilanolítica a partir do segundo dia, mantendo-se constante ao longo de 50 dias. A enzima teve sua maior atividade a 50°C e pH 4,5. A meia-vida aumentou 2,3 vezes quando Xyl foi incubada com tampão acetato de sódio pH 4,5. Estes resultados apontam para a possibilidade de aproveitamento desta xilanase na indústria têxtil, na panificação e em biorefinarias. Diversos íons foram testados, mas nenhum foi capaz de estimular a atividade de Xyl. Dentre os modificadores químicos de aminoácidos, o NBS foi o maior inibidor da atividade de Xyl, sugerindo o envolvimento de L-triptofano na ligação ao substrato ou na catálise. O ?- mercaptoetanol e o L-triptofano foram os maiores ativadores da enzima. Os valores de KM e Vmax encontrados foram de 47,08 mg/mL e 3,02 UI/mL, respectivamente, e há indícios de que Xyl dependa das ramificações da xilana para se ancorar ao substrato. A massa molecular estimada foi de cerca de 33 kDa, e o perfil bidimensional revelou a presença de isoformas ou enzimas múltiplas na amostra. Os resultados da espectrometria de massa sugerem que as xilanases são conservadas entre as espécies do gênero Aspergillus. As imagens de microscopia eletrônica de varredura mostram a degradação do bagaço de cana por enzimas de A. niger. As imagens de microscopia de força atômica sugerem que Xyl pertença à família GH10, mas sua atividade holocelulolítica residual a classificam com GH11. _________________________________________________________________________________ ABSTRACT
Holocelulose is the most abundant component of biomass and it is basically composed of cellulose, hemicellulose and pectin. Sugar cane bagasse is the major waste of brazilian agroindustry and it is a cheap carbon source for microorganisms to produce holocellulolytic enzymes of industrial application. Filamentous fungi are good xylanase producers and their enzymes have been used in industrial processes all over the world. In this study a xylanase (Xyl) produced by the fungus Aspergillus niger over sugar cane bagasse was purified and characterized aiming its biotechnological application. The fungus produces higher amounts of xylanolytic activity from the second day on, and this activity remains relatively constant up to the 50th day. The enzyme presented the best activity at 50°C and pH 4,5. The half-life increased 2,3 times when Xyl was incubated with sodium acetate buffer pH 4,5. The results point out to the application of this enzyme in the textile industry, bakery and biorefineries. None of the tested ions was capable of increasing Xyl activity. NBS was Xyl major inhibitor, suggesting that Ltryptophan is involved in the substrate linkage or catalysis. β- mercaptoethanol and L-tryptophan were the best enzyme activators. The KM and Vmax values were 47,08 mg/mL and 3,02 UI/mL, respectively, and it is possible that Xyl depends on xylan side chains to stabilize over the substrate structure. The estimated molecular mass was about 33 kDa, and the 2Delectrophoresis analysis suggested the existence of multiple forms of xylanases. The mass spectrometry results suggest that the xylanases are conserved among the Aspergillus species. The electron scanning microscopy images show the degradation of sugar cane bagasse by A. niger enzymes. The atomic force microscopy images suggest that Xyl belongs to GH10, but its residual holocelulolytic activity classifies Xyl as a member of GH11 family.
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Santos, Figueroa Luis Enrique. "New approaches for the development of chromo-fluorogenic sensors for chemical species of biological, industrial and environmental interest." Doctoral thesis, Universitat Politècnica de València, 2015. http://hdl.handle.net/10251/43216.
Повний текст джерелаАнотація:
El presente proyecto de investigación está enfocado al desarrollo de sensores químicos fluoro-cromogénicos, para la detección y determinación de especies químicas de interés biológico, industrial y medioambiental de forma selectiva y con alta sensibilidad.
En forma general, se busca el diseñar nuevos sistemas sensores basados en compuestos (receptores) formados por dos unidades: una unidad coordinante que interacciona con el anión a determinar y una unidad generadora de señal que alerta del reconocimiento molecular efectuado.
Durante este estudio se están preparando diversas moléculas receptoras funcionalizandas con grupos modificadores de estructura para evaluar su influencia sobre las capacidades de detección y selectividad como receptores de especies específicas en diferentes condiciones y medios.
Las diferentes aproximaciones en prueba implican a su vez el diseño y síntesis molecular, así como el análisis de las diferentes señales ópticas producidas en el reconocimiento, con el fin de diseñar sistemas de alta eficacia y eficiencia, y con posibilidades reales de aplicación.Santos Figueroa, LE. (2014). New approaches for the development of chromo-fluorogenic sensors for chemical species of biological, industrial and environmental interest [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/43216
TESIS
Premiado
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Destani, Fitim, Bartolo Gabriele, Giuseppe Salerno, Alfredo Cassano, and Roberto Bartolino. "Recovery of molecules of pharmacological interest from blood orange juice by integrated membrane operations." Thesis, 2012. http://hdl.handle.net/10955/1142.
Повний текст джерелаКниги з теми "Molecules - Industrial Interest"
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Amos, Martyn, ed. Cellular Computing. Oxford University Press, 2004. http://dx.doi.org/10.1093/oso/9780195155396.001.0001.
Повний текст джерелаАнотація:
The completion of the first draft of the human genome has led to an explosion of interest in genetics and molecular biology. The view of the genome as a network of interacting computational components is well-established, but researchers are now trying to reverse the analogy, by using living organisms to construct logic circuits. The potential applications for such technologies is huge, ranging from bio-sensors, through industrial applications to drug delivery and diagnostics. This book would be the first to deal with the implementation of this technology, describing several working experimental demonstrations using cells as components of logic circuits, building toward computers incorporating biological components in their functioning.
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Majumdar, Sumit K. Lost Glory. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780199641994.001.0001.
Повний текст джерелаАнотація:
Lost Glory: India’s Capitalism Story describes India’s industrialization experiences. Questions about long-term industry and productivity evolution, and their impact on economic growth, lie at the heart of discourses of capitalism. The book is based on detailed empirical analyses of India’s industrialization over a period of almost seven decades, and a case study of Maruti Suzuki, India’s largest automobile manufacturer. The deeply nuanced depiction of the historical political economy that has affected India’s industrialization is a unique feature. This history will enlighten everyone interested in India. The presentation takes readers on a definitive evidence-based survey of India’s industrial landscape. It includes a detailed historical description of the intellectual origins of India’s modern industrialization, anchored in a privileged view of economic policymaking. Grounded in historical and political analyses, the facts derived on India’s long-term economic performance are used to set the record straight. It is unsparing in its assessments where the evidence warrants such conclusions. Its findings will transform debate, and set the agenda for thoughtfully assessing the future course of India’s prosperity. The author overturns the assumptions that India’s much-vaunted private sector firms only engender positive outcomes, finding State-sector firms to have become efficient, and the molecular sector to be as effective overall, while also challenging the notion that privatization is necessary for progress. Conversely, it is found that competition policy innovations to have had positive impact. Practical suggestions are provided and three fundamental reforms, one administrative, one structural, and one behavioral, necessary to regenerate high output, are advocated.
Частини книг з теми "Molecules - Industrial Interest"
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Fleuri, Luciana Francisco, Haroldo Yukio Kawaguti, Valber Albuquerque Pedrosa, Fabio Vianello, Giuseppina Pace Pereira Lima, Paula Kern Novelli, and Clarissa Hamaio Okino-Delgado. "Exploration of Microorganisms Producing Bioactive Molecules of Industrial Interest by Solid State Fermentation." In Food Quality, Safety and Technology, 147–61. Vienna: Springer Vienna, 2013. http://dx.doi.org/10.1007/978-3-7091-1640-1_10.
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Arnoldi, Michele, Giulia Zarantonello, Stefano Espinoza, Stefano Gustincich, Francesca Di Leva, and Marta Biagioli. "Design and Delivery of SINEUP: A New Modular Tool to Increase Protein Translation." In Methods in Molecular Biology, 63–87. New York, NY: Springer US, 2022. http://dx.doi.org/10.1007/978-1-0716-2010-6_4.
Повний текст джерелаАнотація:
AbstractSINEUP is a new class of long non-coding RNAs (lncRNAs) which contain an inverted Short Interspersed Nuclear Element (SINE) B2 element (invSINEB2) necessary to specifically upregulate target gene translation. Originally identified in the mouseAS-Uchl1 (antisense Ubiquitin carboxyl-terminal esterase L1) locus, natural SINEUP molecules are oriented head to head to their sense protein coding, target gene (Uchl1, in this example). Peculiarly, SINEUP is able to augment, in a specific and controlled way, the expression of the target protein, with no alteration of target mRNA levels. SINEUP is characterized by a modular structure with the Binding Domain (BD) providing specificity to the target transcript and an effector domain (ED)—containing the invSINEB2 element—able to promote the loading to the heavy polysomes of the target mRNA. Since the understanding of its modular structure in the endogenous AS-Uchl1 ncRNA, synthetic SINEUP molecules have been developed by creating a specific BD for the gene of interest and placing it upstream the invSINEB2 ED. Synthetic SINEUP is thus a novel molecular tool that potentially may be used for any industrial or biomedical application to enhance protein production, also as possible therapeutic strategy in haploinsufficiency-driven disorders.Here, we describe a detailed protocol to (1) design a specific BD directed to a gene of interest and (2) assemble and clone it with the ED to obtain a functional SINEUP molecule. Then, we provide guidelines to efficiently deliver SINEUP into mammalian cells and evaluate its ability to effectively upregulate target protein translation.
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Giraud, Eric, Laure Hannibal, Clémence Chaintreuil, Joël Fardoux, and André Verméglio. "Synthesis of Carotenoids of Industrial Interest in the Photosynthetic Bacterium Rhodopseudomonas palustris : Bioengineering and Growth Conditions." In Methods in Molecular Biology, 211–20. New York, NY: Springer New York, 2018. http://dx.doi.org/10.1007/978-1-4939-8742-9_12.
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Hande Tekarslan-Sahin, Seyma. "Metabolic Engineering of Saccharomyces cerevisiae for Industrial Biotechnology." In Saccharomyces. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.96030.
Повний текст джерелаАнотація:
Saccharomyces cerevisiae is an important and popular host for production of value-added molecules such as pharmaceutical ingredients, therapeutic proteins, chemicals, biofuels and enzymes. S. cerevisiae, the baker’s yeast, is the most used yeast model as there is an abundance of knowledge on its genetics, physiology and biochemistry, and also it has numerous applications in genetic engineering and fermentation technologies. There has been an increasing interest in developing and improving yeast strains for industrial biotechnology. Metabolic engineering is a tool to develop industrial strains by manipulating yeast metabolism to enhance the production of value-added molecules. This chapter reviews the metabolic engineering strategies for developing industrial yeast strains for biotechnological applications and highlights recent advances in this field such as the use of CRISPR/Cas9.
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Keelka, Sneha, Pallavi Kaushik, Prachi Jain, and Mukesh Kumar Sharma. "Pharmacological Properties of Bacterial Bioactive Molecules." In Therapeutic Implications of Natural Bioactive Compounds, 262–75. BENTHAM SCIENCE PUBLISHERS, 2022. http://dx.doi.org/10.2174/9789815080025122030016.
Повний текст джерелаАнотація:
The pure or standardized extracts obtained from microbes like bacteria, fungi, actinomycetes, etc. are considered important sources of bioactive compounds. Some of the microbes show inhibitory action against the growth of certain bacteria, fungi, yeast, insects, etc. This provides opportunities for the development of newer drugs and enzymes or beneficial compounds. Large number of bacteria are responsible for producing different bioactive compounds like antibiotics, enzymes, and other secondary metabolites. Some compounds like Gallic acid, Amicoumacin, Prodigiosin, Nystatin, Spinosad, Milbemycin, Lipstatin, Subtilin, Albaflavenone, and Mollemycin A have been studied for their affectivity against bacterial, fungal, insects, pests, etc. These compounds are gaining increasing interest because of their unique composition and the possibility of wide industrial applications.
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Sarkar, Prasenjit, Ashwin Chaturvedi, Rajeev K. Gautam, Nilakshi Devi, and Soumalya Sinha. "Immobilization strategies for carbon electrode materials." In Electrochemistry, 121–51. The Royal Society of Chemistry, 2023. http://dx.doi.org/10.1039/bk9781839169366-00121.
Повний текст джерелаАнотація:
Carbon electrodes are of great interest in analytical and industrial electrochemistry. In addition, the “classical” carbon materials such as graphite, glassy carbon and carbon black have become decent choices for developing energy materials. The basic advantages of these materials include wide potential windows, inert redox activities, and low cost. Furthermore, the variety of carbon materials has made them more popular for applying carbon electrodes in catalyst support or battery technology. As the recent energy challenges seek more such materials for energy storage or performing fuel-forming reactions, finding strategies to incorporate catalysts into the carbon materials has been a promising research area. These strategies include physical adsorption or chemical grafting between the molecules (or catalysts) of interest and host carbon materials. Although a rich literature showcases the applications of molecules-immobilized carbon electrodes in electrocatalysis, the experimental details for the preparation of the heterogeneous carbon electrodes are typically provided in the Supporting Information documents and often become difficult to find based on web search. In this chapter, we attempt to gather such experimental conditions focusing on the strategies to incorporate molecular electrocatalysts onto carbon surfaces. In addition, we also included the strategies of how carbon materials are used to keep the fundamental ingredients of batteries immobilized to improve battery longevity.
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Noriega, Paco, Gabriela Gortaire, and Edison Osorio. "Mass Spectrometry and Its Importance for the Analysis and Discovery of Active Molecules in Natural Products." In Pharmacognosy - Medicinal Plants [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.97733.
Повний текст джерелаАнотація:
Mass spectrometry is one of the best techniques for analyzing the structure of a molecule. It usually provides information about the molecular weight of a substance, and it can present atomic mass units and up to ten thousandths of atomic mass units depending on the accuracy of the mass analyzer. In addition, it provides information on the positive ions formed in the ionization process, which is linked to the chemical structure of the molecule and the nature of the bonds. This technique is widely used for analyzing compounds from natural products. The development of the technique combined with the use of software and databases has been remarkable in recent years, improving the ionization processes and the ion analysis. Since natural products generally constitute a mixture of a complex quantity of components, mechanisms have been developed for coupling to chromatographic techniques of various kinds. This review aims to show how mass spectrometry has contributed to the qualitative quality control in natural products, as well as in the finding of new metabolites of industrial interest.
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Le Rouzic, Morgan, Pauline Bruniaux, Cyril Raveschot, François Krier, Vincent Phalip, Rozenn Ravallec, Benoit Cudennec, and François Coutte. "Lactobacillus Use for Plant Fermentation: New Ways for Plant-Based Product Valorization." In Lactobacillus - A Multifunctional Genus [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.104958.
Повний текст джерелаАнотація:
Today, plant production is increasing, but most industrial processes generate a lot of waste and by-products for which, in the current context, it is a priority to recycle or valorize them. One of the cheapest valorization routes is fermentation, in particular lactic fermentation by Lactobacillus species, which produces lactic acid and other molecules of industrial interest such as bioactive compounds such as anthocyanin, organic acid, peptides, or phenol, which are widely found in the plant matrix, mainly in cereals, grass, fruits, and vegetables. Bioactive compounds may exert beneficial health effects, such as antioxidant, anti-inflammatory, antimicrobial, or prebiotic activities. In addition, lactic acid fermentation can improve existing products and lead to new applications in food, livestock feeding and biotechnology, such as the production of lactic acid, protein, or silage. This chapter reviews the use of Lactobacillus strains in the fermentation process of many plant bioresources or by-products through their different bioactivities, active molecules, and applications.
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Baird, Davis. "Analytical Instrumentation and Instrumental Objectivity." In Of Minds and Molecules. Oxford University Press, 2000. http://dx.doi.org/10.1093/oso/9780195128345.003.0013.
Повний текст джерелаАнотація:
The bulk of this chapter is concerned with analytical chemistry during and for the first decade after World War II. At this time analytical chemistry underwent a radical change, which can most easily be characterized as a shift from wet chemistry to instrumental methods (Baird, 1993). Although this transformation of analytical chemistry may interest readers of this volume for a variety of reasons, I focus here on a shift in the concept and practice of a kind of objectivity. Objectivity is one of those concepts with generally positive connotations, but whose exact characterization proves elusive. A dictionary tells us that, as an adjective, objective applies to that which has “actual existence or reality.” Objective observation is “based on observable phenomena” and “uninfluenced by emotions or personal prejudices” (American Heritage Dictionary, 1993, p. 940). Objectivity, it would seem, either sits next to truth or defines the right route to truth. What emerges here, however, is a more complicated concept—a concept with a history that serves various agendas through suitable shades of meaning and marriages of convenience with other concepts. The development of instrumental methods in analytical chemistry made possible fast, precise, and accurate analyses of a wide variety of important substances. Instrumental methods changed forever the metals industries, medical diagnosis, oil analysis, and forensic analytical chemistry, to mention a few highlights. In a very real sense, these developments in analytical chemistry made contemporary science and technology possible by opening up vast new continents of information about the world, which could be gained relatively easily and applied toward technological and/or scientific ends. I argue here that these developments in analytical chemistry established a paradigm for one kind of concept of objectivity. Ralph Müller, who will play a central role in this discussion, wrote in the January 1947 issue of the Analytical Edition of Industrial and Engineering Chemistry (the journal that subsequently became Analytical Chemistry): . . .The true instrumental method of analysis requires no reduction of data to normal pressure and temperature, no corrections or computations, no reference to correction factors nor interpolation on nomographic charts. . . .
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Mohammed, Mohammed, and Rozyanty Rahman. "Utilizing Photocatalysts in Reducing Moisture Absorption in Composites of Natural Fibers." In Photocatalysts - New Perspectives [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.106543.
Повний текст джерелаАнотація:
Due to growing environmental consciousness and the depletion of oil supplies, numerous efforts have been made to replace synthetic fibers in fiber-reinforced composites with natural fibers (NFr). The low cost and abundance of NFr and its biodegradability and low density have encouraged researchers worldwide to study their potential applications in several industrial sectors. However, NFr has several disadvantages: excessive moisture absorption and subsequent swelling and degradation, low chemical and fire resistance, and insufficient interfacial interactions with polymers. Consequently, there is great interest in modifying the surface of NFr using a variety of methods. This chapter presents an overview of the NFr, its characterization, the problems associated with adding NFr to polymer composites. This literature survey suggests an in-depth review of photocatalysis by utilizing photocatalysts nanoparticle (PHNPs) aimed at increasing the hydrophobicity and interfacial bonding between the NFr and the matrix Using a photo-induced oxidation mechanism to disassemble water molecules, pollutants, and bacteria in a wet environment. Additionally, we reviewed the effects of these PHNPs on the moisture absorption, mechanical characteristics, and dimensional stability of NFr composites. As a result, this review article may make a valuable contribution to researchers interested in coating and treating NFr to further enhance their surface characteristics.
Тези доповідей конференцій з теми "Molecules - Industrial Interest"
1
De Oliveira Vigier, Karine, Christophe Coutanceau, and Steve Baranton. "Electro-oxidation of glycerol and diglycerol in the presence of Pt or Pd-based electrocatalyst follows by the reductive amination of the products obtained." In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/olba8004.
Повний текст джерелаАнотація:
The selective electro-oxidation of bio-based organic molecules such as glycerol, polyglycerols, saccharides and furanic compounds has received particular attention in recent years, due to the high value-added compounds that result and their numerous industrial applications. Electrochemical methods are therefore well suited for the controlled oxidation of small organic molecules in aqueous media. Glycerol valorization through partial oxidation is a good way of obtaining many different molecules with high added value such as glyceric acid, tartronic acid, dihydroxyacetone, glyceraldehyde etc., that can find various applications in different domains such as organic chemistry, medical, and cosmetic industries. Here we have studied the electro-oxidation of glycerol in the presence of Pt or Pd-based catalysts. The development of mono- and bimetallic catalysts based on platinum on the one hand and palladium on the other hand for the electro-oxidation of glycerol is a very important goal to direct the reaction pathways to desired products.            Bimetallic catalysts synthesized by the water-in-oil microemulsion method were characterized by physicochemical (TEM, XRD, ATG, SAA and ICP-OES) and electrochemical (active surface and surface composition study) methods in order to obtain a correlation between surface structure and electrochemical response. The reactivity of glycerol and diglycerol in alkaline medium was evaluated to determine the catalyst offering the best conversion. A selectivity study of these catalysts was performed by in situ infrared spectroscopy to determine the reaction intermediates. The distribution of reaction products was determined by HPLC analysis and 1H and 13C NMR analyses.
           Reductive amination reactions with ammonia on the one hand and n-butylamine on the other hand on products identified as being of interest (glyceraldehyde/dihydroxyacetone) were carried out in the presence of hydrogen and catalyzed by palladium-based nanoparticles dispersed on carbon.
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Platonov, Aleksey, A. Popov, Svetlana Snegireva, and Ekaterina Kantieva. "CHANGE IN THE HYGROSCOPICITY OF PINE CORE WOOD IN A TREE TRUNK DAMAGED BY FIRE." In Modern machines, equipment and IT solutions for industrial complex: theory and practice. FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov, 2021. http://dx.doi.org/10.34220/mmeitsic2021_274-278.
Повний текст джерелаАнотація:
Fires have a significant impact on the structure and physical and mechanical properties of wood. The degree of this effect depends on the type of fire, its intensity and the duration of exposure to high temperature. The greatest impact on the wood occurs with a strong grassroots and general top fire. Gorenje fire is characterized by a high intensity of burning of forest floor and undergrowth, as well as the crown of trees. The effect of the high temperature of the fire on the tree trunk is different. As a result of the destruction of wood, there is a partial blocking of hydroxyl groups in the cellulose molecules and leads to a decrease in the hygroscopicity limit of wood. Of great practical interest is the change in the hygroscopicity of wood damaged by fire. The aim of this study is to determine the changes in the hygroscopicity of the core wood of Scots pine (Pinus sylvestris L.)after damage by a strong grassroots and general high-level fire. The studies were carried out on wood growing on the territory of the UOL in the Voronezh region, on samples of pine core wood cut from the clump, middle and apex parts of the trunk. It was experimentally established that the greatest decrease in the hygroscopicity of pine core wood occurred in the left part of the trunk, and the smallest in the middle part, after fire damage.
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Speed, Jonathon. "Demystifying chemometrics: how multivariate analysis allows spectroscopy to be used to solve most analytical problems." In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/pkrn4677.
Повний текст джерелаАнотація:
Chemists have been using spectroscopic techniques for decades if not hundreds of years. The large range of different physical transitions nuclei and molecules can undertake when irradiate with specific wavelengths of light means that almost every property of interest can and has been studied by spectroscopic means. However, the need to interpret the raw spectra means only specialists are able to interpret the fundamental information present in a spectrum, turning spectroscopy into a tool for experts. The advent of chemometrics meant that spectrometers could be changed into concentration meters, allowing a user to run a previously built calibration curve and understand the makeup of their sample. As a result, many industries now have a dwindling pool of spectroscopy “power users” and have retired their powerful instruments into pre-determined QC tests. This presentation aims to educate and empower the attendees as to the power of spectroscopy, and the different types of analysis it allows, ranging from fundamental chemical makeup through to on-line and real-time processing analysis for industrial installations. We will briefly outline the different types of spectroscopy commonly used in laboratories and on-line, and explain their strengths and weaknesses. Next, we will explain the fundamentals behind multivariate analysis, focusing on principal component analysis (PCA) and partial least squares (PLS) methodology as well as multivariate curve resolution (MCR). We will then explain how chemometrics can be used to investigate in detail what is occurring during a process, how the advanced statistics generated on every spectrum allow in depth analysis of the process (for example how to properly use Hotelling’s T2 and Q Residuals) and give some case studies.
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Melo, Palloma M. J. de, Nathália S. A. A. Marques, Adriana F. de Souza, Gabriela R. P. de Andrade, and Galba M. de Campos-Takaki. "Strategy for sustainable biosurfactant production by mucor circinelloides UCP0017." In III SEVEN INTERNATIONAL MULTIDISCIPLINARY CONGRESS. Seven Congress, 2023. http://dx.doi.org/10.56238/seveniiimulti2023-267.
Повний текст джерелаАнотація:
Surfactants are molecules with amphipathic structures, that is, one polar extreme (hydrophilic) and the other nonpolar (hydrophobic), possessing a high capacity to reduce surface tension, emulsification production and wetting (PELE et al., 2019; BIONE, 2019). Its origin can be chemical usually derived from petroleum, being compounds that easily harm the environment making it difficult to remove it (BIONE, 2019; GAYATHIRI et al., 2022). As they can also be natural, through microorganisms such as bacteria, filamentous fungi and yeasts or are biodegradable and of low toxicity, not harming the environment or human health. (RULLI et al., 2019; CÂNDIDO et al., 2022). Therefore, the present study aims to seek the optimization of the production of biosurfactant becoming a more advantageous alternative because they use renewable substrates in their composition, and because their "green" properties do not harm the environment, besides being biodegradable, thus improving their cost-benefit, aiming at new opportunities for applications in the food, agricultural, cosmetic and pharmaceutical industries (MARQUES et al., 2020; GAYATHIRI et al., 2022; MULLIGAN, 2023).The main responsible for the production of biosurfactants and bioemulsifiers are bacteria, followed by yeasts and finally filamentous fungi because they have a potential for the production of secondary metabolites and a high value of biomass, however, studies with filamentous fungi are little explored (SAŁEK & EUSTON, 2019; DERGUINE-MECHERI; KEBBOUCHE-GANA; DJENANE, 2021). According to Geethanjali et al., (2020) and Marques et al., (2020) the species Mucor circinelloides, of the phylum Mucoromycota, order Mucorales, presents a high biotechnological potential in the production of biomolecules of industrial interest, as well as biosurfactant. In this sense, the research proposed to study the performance of biosurfactant production through the filamentous fungus Mucor circinelloides UCP 0017 using alternative substrates (MARQUES et al., 2020; RADHA et al., 2020).
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Tanuma, Hajime. "Charge exchange spectroscopy of multiply charged ions of industrial and astrophysical interest." In EIGHTH INTERNATIONAL CONFERENCE ON ATOMIC AND MOLECULAR DATA AND THEIR APPLICATIONS: ICAMDATA-2012. AIP, 2013. http://dx.doi.org/10.1063/1.4815854.
Повний текст джерела
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Xie, Oliver, Parkson Lee-Gau Chong, and Jack Zhou. "A Smart Actuator Design for Multiple Bio-Reagent Mixing in a High Pressure Optical Cell for Bio-Physical Research Applications." In ASME 2008 International Manufacturing Science and Engineering Conference collocated with the 3rd JSME/ASME International Conference on Materials and Processing. ASMEDC, 2008. http://dx.doi.org/10.1115/msec_icmp2008-72137.
Повний текст джерелаАнотація:
During the past two decades, bio-physicists have had an increasing interest in finding out what happens when two bio-material solutions are mixed under high pressure. Compared to temperature, pressure makes more contributions to our fundamental understanding of the structure-function relationship of biological systems, because pressure produces only volume changes under isothermal conditions, and pressure results can then be interpreted in a more straightforward manner. Window-type High Pressure Optical Cell (HPOC) such as the one designed by Paladini and Weber have provided biophysicists with a powerful tool to understanding the structure-function relationships of biological molecules. However, the conventional HPOC is only good for single solution testing and does not allow for quick mixing and stirring of additional components while the specimen is under pressure. This research is to thoroughly study the feasibility of Shape Memory Alloy (SMA) as an actuator to perform mixing and agitation functions; and five types of SMA actuators were designed, simulated and tested for unplugging and mixing purposes. To conduct this research, SMA helical springs were fabricated in house according to the design requirements. With different combinations of SMA tensile springs, SMA compressive spring and biasing spring, significant ranges of vibration were developed. To further improving mixing process, a unique hybrid design of SMA as an actuator to unplug the stopper and micromotor as a stir device to agitate the solutions was developed. Rapid mixing of 95% of total solution in 10 seconds was achieved under 300 bars. A new HPOC was designed according to the new cuvette with its new unplug and mixing mechanism. Our industrial partner, ISS, further modified our design for easy manufacturing reason and fabricated the HPOC which made SMA actuator mixing test under pressure possible. A complete testing of the new HPOC system to observe bio-reagent mixing and reaction under high pressure was conducted and the results were satisfactory.
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Kim, Byeong Geun, Joon Sik Lee, Seungho Park, and Young Ki Choi. "A Molecular Dynamics Study on Thermophysical Properties and Stability of Nanoscale Liquid Thread." In ASME 2003 Heat Transfer Summer Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/ht2003-47399.
Повний текст джерелаАнотація:
In recent years, the characteristic behavior of nanoscale liquid thread has drawn much attention because of its scientific interest and industrial applications. Since the experimental investigation of liquid thread properties and its stability is extremely formidable, most studies rely heavily on the theoretical or numerical approach.
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Sibanda, Charmaine, Gurthwin Bosman, and Erich Rohwer. "Diffusivity of single fluorescent probes embedded in thin polymer films." In JSAP-OSA Joint Symposia. Washington, D.C.: Optica Publishing Group, 2017. http://dx.doi.org/10.1364/jsap.2017.6p_a409_2.
Повний текст джерелаАнотація:
Photophysics and photochemistry in polymer science has been central areas of interest in understanding the structure and dynamics of polymers. The physical properties of polymers especially the dynamical properties close to the phase transition from rubbery to the glassy state are complex and have not been completely understood despite experimental and theoretical studies over the past decades [1]. Understanding the dynamics of polymer nano environments is highly crucial for numerous technological applications in various industrial and biomedical sectors related to protective and functional coatings and biocompatibility of medical implants [2]. The diffusivity of single probes embedded in thin polymer films can exhibit unusual physical properties due to geometric constraints imposed by the presence of surfaces and interfaces and using single molecule fluorescence microscopy as an imaging technique, allows one to look at the microscopic processes on the nanometer scale [3]. For this research single nanoparticles were embedded in thin polystyrene (PS) and poly (isobutyl methacrylate) (PIMA) films, some of these polymeric films were relaxed and the others were non-relaxed in order to study nano scale polymer dynamics that affect the diffusivity of the single nanoparticles. The diffusivity of the single nanoparticles helps to study the molecular dynamics in thin polymeric films and how these molecular dynamics are related to the glass transition of the thin polymer films. The molecular dynamics include the relaxation processes in polymers such as the α-relaxation, which is believed to contribute to the heterogeneity motion of the single nanoparticles as the temperature of the polymer film is increased towards the glass transition temperature.
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Laborde, J. L., G. Servant, A. Hita, J. P. Caltagirone, and A. Gerard. "Cavitation Bubble Field at Low Frequency: Simulations and Experiments." In ASME 2000 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/imece2000-2085.
Повний текст джерелаАнотація:
Abstract Power ultrasound is becoming a generally recognized tool in small-scale laboratory. It has considerable potential for industrial use. Actually, propagation of ultrasound wave (from 20 to 800 kHz) through a liquid inside a cylindrical reactor initiates acoustic cavitation and fluid dynamics phenomena. Acoustic cavitation is the formation and activity of bubbles in a liquid due local negative pressures. Spectacular effects including: erosion, sonoluminescence, molecular damage and chemical effects occur. Traveling power ultrasound also initiates fluid dynamics phenomena such as free surface deformations (aerosol formation), convection (macro-mixing), acoustic streaming (micro-mixing), … Characterization of the wave field formation is of significant importance for understanding phenomena and designing and optimizing industrial reactors. Mathematical modeling is here of a great interest, because the scale-up difficulties of ultrasound-based processes. Then, two-phase models (bubbles in liquid) are shown necessary, because bubble clouds interact directly with ultrasound propagation and modify the pressure field establishment. The cavitation field is so dense that it could play the role of an acoustic screen. Bubbles dynamic is considered and simple models are derived. Results show the influence of a homogeneous density distribution of bubbles on the wave attenuation and the agreement between the transient bubble motion induced by pressure gradients and visualizations.
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Awad, Walid, Amal Esawi, and Adham Ramadan. "Fabrication and Properties of Nylon-6/Layered Silicate Nanocomposites by Melt Blending." In ASME 2008 2nd Multifunctional Nanocomposites and Nanomaterials International Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/mn2008-47039.
Повний текст джерелаАнотація:
Polymer/clay nanocomposites currently attract immense interest from both research and industrial communities. By dispersing at the molecular level a tiny amount of clay within a polymeric matrix, a wide range of properties can be significantly improved. The efficiency of the clay (layered silicate) in improving the properties of the polymer materials is primarily determined by the degree of its dispersion in the polymer matrix. To promote the molecular and stable dispersion of the clay layers, the clays should be organically-modified with onium salts. In this work, nylon-6 nanocomposites based on two types of commercial organoclays were prepared by melt blending via single-screw extrusion. The good dispersion of clay in the nylon-6 nanocomposites was confirmed by X-ray diffraction and transmission electron microscopy. The influence of the dispersed nano-clay fillers on the thermal and mechanical properties of the resulting nanocomposites was characterized using thermogravimetric analysis and nanoindentation.
Звіти організацій з теми "Molecules - Industrial Interest"
1
Gurevitz, Michael, William A. Catterall, and Dalia Gordon. face of interaction of anti-insect selective toxins with receptor site-3 on voltage-gated sodium channels as a platform for design of novel selective insecticides. United States Department of Agriculture, December 2013. http://dx.doi.org/10.32747/2013.7699857.bard.
Повний текст джерелаАнотація:
Voltage-gated sodium channels (Navs) play a pivotal role in excitability and are a prime target of insecticides like pyrethroids. Yet, these insecticides are non-specific due to conservation of Navs in animals, raising risks to the environment and humans. Moreover, insecticide overuse leads to resistance buildup among insect pests, which increases misuse and risks. This sad reality demands novel, more selective, insect killers whose alternative use would avoid or reduce this pressure. As highly selective insect toxins exist in venomous animals, why not exploit this gift of nature and harness them in insect pest control? Many of these peptide toxins target Navs, and since their direct use via transformed crop plants or mediator microorganisms is problematic in public opinion, we focus on the elucidation of their receptor binding sites with the incentive of raising knowledge for design of toxin peptide mimetics. This approach is preferred nowadays by agro-industries in terms of future production expenses and public concern. However, characterization of a non-continuous epitope, that is the channel receptor binding site for such toxins, requires a suitable experimental system. We have established such a system within more than a decade and reached the stage where we employ a number of different insect-selective toxins for the identification of their receptor sites on Navs. Among these toxins we wish to focus on those that bind at receptor site-3 and inhibit Nav inactivation because: (1) We established efficient experimental systems for production and manipulation of site-3 toxins from scorpions and sea anemones. These peptides vary in size and structure but compete for site-3 on insect Navs. Moreover, these toxins exhibit synergism with pyrethroids and with other channel ligands; (2) We determined their bioactive surfaces towards insect and mammalian receptors (see list of publications); (3) We found that despite the similar mode of action on channel inactivation, the preference of the toxins for insect and mammalian channel subtypes varies greatly, which can direct us to structural features in the basis of selectivity; (4) We have identified by channel loop swapping and point mutagenesis extracellular segments of the Navinvolved with receptor site-3. On this basis and using channel scanning mutagenesis, neurotoxin binding, electrophysiological analyses, and structural data we offer: (i) To identify the residues that form receptor site-3 at insect and mammalian Navs; (ii) To identify by comparative analysis differences at site-3 that dictate selectivity toward various Navs; (iii) To exploit the known toxin structures and bioactive surfaces for modeling their docking at the insect and mammalian channel receptors. The results of this study will enable rational design of novel anti-insect peptide mimetics with minimized risks to human health and to the environment. We anticipate that the release of receptor site-3 molecular details would initiate a worldwide effort to design peptide mimetics for that site. This will establish new strategies in insect pest control using alternative insecticides and the combined use of compounds that interact allosterically leading to increased efficiency and reduced risks to humans or resistance buildup among insect pests.