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Journal articles on the topic 'GREEN SYNTHETIC PATHWAYS'

Author: Grafiati

Published: 11 September 2023

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1

Tundo, Pietro, Paul Anastas, David StC Black, et al. "Synthetic pathways and processes in green chemistry. Introductory overview." Pure and Applied Chemistry 72, no. 7 (2000): 1207–28. http://dx.doi.org/10.1351/pac200072071207.

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ContentsGreen Chemistry in the International ContextThe Concept of green ChemistryDefinition of green chemistry | Green chemistry: Why now? | The historical context of green chemistry | The emergence of green chemistryThe Content of Green ChemistryAreas of green chemistry | Preliminary remarks | Alternative feedstocks | Benign reagents/synthetic pathways | Synthetic transformations | Solvents/reaction conditionsGreen Chemistry in the International ContextIt has come to be recognized in recent years, that the science of chemistry is central to addressing the problems facing the environment. Thr

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2

Tan, Lan, and Abdul Rahman. "An Economical, Sustainable Pathway to Indole-Containing Oxindoles: Iron-Catalyzed 1,6-Conjugate Addition in Glycerol." Sustainability 10, no. 8 (2018): 2922. http://dx.doi.org/10.3390/su10082922.

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The search for economical, sustainable and practical pathways in synthetic science would contribute to improving resource efficiency, developing a recycling economy and driving new-type urbanization. Green synthesis has established firm ground providing the right green yardstick for development of a sustainable approach to bioactive high-added value molecules and drug discovery, and further development of sustainable manufacturing processes in the pharmaceutical industry toward a green resource efficient economy. In this study, the combination of FeCl3 and glycerol exhibits a versatile and hig

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Kumar, Suresh, Bhavna Saroha, Gourav Kumar, et al. "Recent Developments in Nanocatalyzed Green Synthetic Protocols of Biologically Potent Diverse O-Heterocycles—A Review." Catalysts 12, no. 6 (2022): 657. http://dx.doi.org/10.3390/catal12060657.

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The dynamic growth in green organic synthetic methodologies for diverse heterocyclic scaffolds has substantially contributed to the field of medicinal chemistry over the last few decades. The use of hybrid metal nanocatalysts (NCs) is one such benign strategy for ensuring the advancement of modern synthetic chemistry by adhering to the principles of green chemistry, which call for a sustainable catalytic system that converts reacting species into profitable chemicals at a faster rate and tends to reduce waste generation. The metal nanoparticles (NPs) enhance the exposed surface area of the cat

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Appy, Lucie, Crystalle Chardet, Suzanne Peyrottes, and Béatrice Roy. "Synthetic Strategies for Dinucleotides Synthesis." Molecules 24, no. 23 (2019): 4334. http://dx.doi.org/10.3390/molecules24234334.

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Dinucleoside 5′,5′-polyphosphates (DNPs) are endogenous substances that play important intra- and extracellular roles in various biological processes, such as cell proliferation, regulation of enzymes, neurotransmission, platelet disaggregation and modulation of vascular tone. Various methodologies have been developed over the past fifty years to access these compounds, involving enzymatic processes or chemical procedures based either on P(III) or P(V) chemistry. Both solution-phase and solid-support strategies have been developed and are reported here. Recently, green chemistry approaches hav

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Yelmame, Ganesh B., and SHRIKANT B. JAGTAP. "Review on Perimidines: A synthetic Pathways Approach." Material Science Research India 18, no. 1 (2021): 14–26. http://dx.doi.org/10.13005/msri/180103.

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Perimidines are available in an assortment of drugs and general use industrial structures and perimidines are also significant primary theme because of their extraordinary method of physiological activity. Thus the underlying significance of perimidine moiety has evoked a lot of interest in the field of natural blend and compound science to build up some better than ever amalgamation of this atomic skeleton. In this review, we have depicted a modern outline on the new advances in the different manufactured approaches of perimidine. The review covers the essential applied and down to earth syne

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Aghahosseini, Hamideh, Ali Ramazani, Farideh Gouranlou, and Sang Woo Joo. "Nanoreactors Technology in Green Organic Synthesis." Current Organic Synthesis 14, no. 6 (2017): 810–64. http://dx.doi.org/10.2174/1570179413666161008200641.

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Background: Nanoreactors technology represents a promising tool for efficient and selective organic synthesis typically under “green” and sustainable reaction conditions. These structures with generating a confined reaction environment to accommodate that both reactants and catalysts can change the reaction pathways and induce new activities and selectivities. Objective: The paper reviews literature examples in which nanoreactors were employed in various types of organic and metal catalyzed reactions including multicomponent reactions, palladium-catalyzed coupling reactions, olefin metathesis,

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Quivelli, Andrea Francesca, Federico Vittorio Rossi, Chiara Alario, et al. "Green Solvents for Eco-Friendly Synthesis of Dimethindene: A Forward-Looking Approach." Molecules 27, no. 21 (2022): 7594. http://dx.doi.org/10.3390/molecules27217594.

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Dimethindene is a selective histamine H1 antagonist and is commercially available as a racemate. Upon analyzing the synthetic pathways currently available for the industrial preparation of dimethindene, we set up a sustainable approach for the synthesis of this drug, switching from petroleum-based volatile organic compounds (VOCs) to eco-friendly solvents, such as 2-methyltetrahydrofuran (2-MeTHF) and cyclopentyl methyl ether (CPME) belonging to classes 3 and 2, respectively. Beyond decreasing the environmental impact of the synthesis (E-factor: 24.1–54.9 with VOCs; 12.2–22.1 with 2-MeTHF or C

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Jicsinszky, László, Federica Rossi, Roberto Solarino, and Giancarlo Cravotto. "Comparison of the Conventional and Mechanochemical Syntheses of Cyclodextrin Derivatives." Molecules 28, no. 2 (2023): 467. http://dx.doi.org/10.3390/molecules28020467.

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Many scientists are working hard to find green alternatives to classical synthetic methods. Today, state-of-the-art ultrasonic and grinding techniques already drive the production of organic compounds on an industrial scale. The physicochemical and chemical behavior of cyclodextrins often differs from the typical properties of classic organic compounds and carbohydrates. The usually poor solubility and complexing properties of cyclodextrins can require special techniques. By eliminating or reducing the amount of solvent needed, green alternatives can reform classical synthetic methods, making

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9

Rusling, James F. "Green synthesis via electrolysis in microemulsions." Pure and Applied Chemistry 73, no. 12 (2001): 1895–905. http://dx.doi.org/10.1351/pac200173121895.

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Electrolysis in microemulsions is a promising approach for environmentally friendly chemical synthetic methods of the future. Employing microemulsions instead of organic solvents for electrosynthesis has the advantages of lower toxicity and cost, high dissolving power for reactants and mediators of unlike solubility, enhancement of reaction rates by controlling the reduction potentials of mediators, possible reaction pathway control, and recycling of microemulsion components. This paper reviews recent progress in using microemulsions for direct and mediated electrosynthesis, including formatio

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Khajuria, Ajay, Shubam Sudan, and Mohit Kapoor. "Brief Overview on Synthesis and Application of Ni–Doped Carbon Dots." ECS Transactions 107, no. 1 (2022): 6129–36. http://dx.doi.org/10.1149/10701.6129ecst.

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Carbon dots (CDs) are semiconductor materials with sizes ranging from 2 to 10 nm. Among these CDs, nickel CDs (Ni@CDs) materials have piqued researchers' curiosity in the past years due to their specific properties, such as strong catalytic activity, good stability, great hydrophilicity, and high oxidation states. Several synthetic pathways exist for the synthesis of Ni@CDs, such as hydrothermal method, microwave irradiation, green synthesis, pyrolytic decomposition, precipitation method, and electrochemical route. These Ni@CDs have shown application in charge transfer, excellent thermodynamic

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11

Gafurov, Zufar N., Alexey A. Kagilev, Artyom O. Kantyukov, Oleg G. Sinyashin, and Dmitry G. Yakhvarov. "Hydrogenation reaction pathways in chemistry of white phosphorus." Pure and Applied Chemistry 91, no. 5 (2019): 797–810. http://dx.doi.org/10.1515/pac-2018-1007.

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Abstract Approaches for preparation of P–H bond containing derivatives directly from white phosphorus are summarized in this microreview. Transfer hydrogenation of P4 involving the activation and reaction of white phosphorus in the coordination sphere of transition metal complexes is a convenient and powerful route to the hydrogenated compounds. Electrochemical methods have also become popular in modern synthetic chemistry; these provide easy access to highly reactive intermediates, which can be selectively generated in situ and used for subsequent synthetic processes. These electrochemical ro

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12

Singh, KalpanaVirendra. "MICROWAVE ASSISTED SYNTHESIS, A GREEN PROTOCOL FOR DEVELOPMENT OF NEW AND ADVANCED DRUG DELIVERY SYSTEMS, A REVIEW." International Journal of Research -GRANTHAALAYAH 3, no. 9SE (2015): 1–4. http://dx.doi.org/10.29121/granthaalayah.v3.i9se.2015.3126.

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Medicinal Chemistry community is considering new chemical processes, which are environmentally benign. Environmentally benign synthetic protocols have become the primary concern during complex drug discovery processes. Green chemistry is providing algorithms for protecting the environment, not by cleaning it, but by inventing new chemical processes that fuel the Economy and lifestyles, without causing any damage to the environment. Microwave assisted techniques has opened up new opportunities to the synthetic chemists in the form of new improved reaction pathways, that are not otherwise feasib

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De Martino, M. Teresa, Loai K. E. A. Abdelmohsen, Floris P. J. T. Rutjes, and Jan C. M. van Hest. "Nanoreactors for green catalysis." Beilstein Journal of Organic Chemistry 14 (March 29, 2018): 716–33. http://dx.doi.org/10.3762/bjoc.14.61.

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Sustainable and environmentally benign production are key drivers for developments in the chemical industrial sector, as protecting our planet has become a significant element that should be considered for every industrial breakthrough or technological advancement. As a result, the concept of green chemistry has been recently defined to guide chemists towards minimizing any harmful outcome of chemical processes in either industry or research. Towards greener reactions, scientists have developed various approaches in order to decrease environmental risks while attaining chemical sustainability

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Irwansyah, Ferli Septi, Atiek Rostika Noviyanti, Diana Rakhmawaty Eddy, and Risdiana Risdiana. "Green Template-Mediated Synthesis of Biowaste Nano-Hydroxyapatite: A Systematic Literature Review." Molecules 27, no. 17 (2022): 5586. http://dx.doi.org/10.3390/molecules27175586.

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Hydroxyapatite (HA) is a well-known calcium phosphate ingredient comparable to human bone tissue. HA has exciting applications in many fields, especially biomedical applications, such as drug delivery, osteogenesis, and dental implants. Unfortunately, hydroxyapatite-based nanomaterials are synthesized by conventional methods using reagents that are not environmentally friendly and are expensive. Therefore, extensive efforts have been made to establish a simple, efficient, and green method to form nano-hydroxyapatite (NHA) biofunctional materials with significant biocompatibility, bioactivity,

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15

Jaffri, Shaan Bibi, and Khuram Shahzad Ahmad. "Phytofunctionalized silver nanoparticles: green biomaterial for biomedical and environmental applications." Reviews in Inorganic Chemistry 38, no. 3 (2018): 127–49. http://dx.doi.org/10.1515/revic-2018-0004.

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AbstractVariegated physicochemical routes with emerging modifications have been adopted and reported for silver nanoparticle synthesis for centuries. Nano-biotechnology aimed at the synthesis of nanomaterials, including silver nanoparticles, through utilization of biological media has acquired an auspicious role in science for human welfare. Despite recurrent nanoscale researches on physicochemical routes, coeval stages are predominated by greener methods in silver nanoparticle synthesis for the utilization of its inherent toxicity and exceedingly smaller sizes for biological and environmental

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16

Wang, Xiaoxue, Yujie Qian, Hanyu Gao, et al. "Towards efficient discovery of green synthetic pathways with Monte Carlo tree search and reinforcement learning." Chemical Science 11, no. 40 (2020): 10959–72. http://dx.doi.org/10.1039/d0sc04184j.

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17

Bull, James R. "Preface." Pure and Applied Chemistry 72, no. 7 (2000): v. http://dx.doi.org/10.1351/pac20007207ii.

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The evolving face of contemporary chemistry is characterized by unprecedented societal demand for the goods and services of the chemical industry, tempered by growing awareness that finite resources must be conserved and their exploitation optimized. At the same time, environmental protection has become a global concern, and the chemical industry is increasingly obliged to reexamine conventional methodologies, and to seek ways of developing and applying more efficient and environmentally benign strategies for future sustainable growth. The tandem concepts of discovery and exploitation are obvi

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18

Ajani, Olayinka Oyewale, and King T. Iyaye. "Recent advances on oxadiazole motifs: Synthesis, reactions and biological activities." Mediterranean Journal of Chemistry 10, no. 5 (2020): 418. http://dx.doi.org/10.13171/mjc10502005121200ooa.

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<p>1,3,4-oxadiazole derivatives have shown to have diverse and vast applications, from medicinal chemistry for the treatment and possible treatment of various ailments to its application in the industrial development when used as corrosion inhibitions and light emitting diodes. These diverse applications can be as a result of the numerous viable synthetic pathways illustrated in this review. 1,3,4-oxadiazoles can be synthesized in very high yields, using green approaches and having various life-changing applications. This review explores the various recent synthetic routes available for

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Santi, Micol, Luca Sancineto, Vanessa Nascimento, et al. "Flow Biocatalysis: A Challenging Alternative for the Synthesis of APIs and Natural Compounds." International Journal of Molecular Sciences 22, no. 3 (2021): 990. http://dx.doi.org/10.3390/ijms22030990.

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Biocatalysts represent an efficient, highly selective and greener alternative to metal catalysts in both industry and academia. In the last two decades, the interest in biocatalytic transformations has increased due to an urgent need for more sustainable industrial processes that comply with the principles of green chemistry. Thanks to the recent advances in biotechnologies, protein engineering and the Nobel prize awarded concept of direct enzymatic evolution, the synthetic enzymatic toolbox has expanded significantly. In particular, the implementation of biocatalysts in continuous flow system

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20

Wahab, Maryam, and Srinivas Janaswamy. "A review on biogenic silver nanoparticles as efficient and effective antidiabetic agents." Functional Food Science 3, no. 7 (2023): 93. http://dx.doi.org/10.31989/ffs.v3i7.1119.

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The frontiers of nanomedicine are consistently being challenged by the gradually expanding knowledge of the properties of nanoparticles. Toward this end, biogenic synthesis of silver nanoparticles utilizing natural compounds in plants as reducing and capping agents grabbed considerable attention, in lieu of synthetic hazardous physical and chemical techniques. Green synthesis of silver nanoparticles (AgNPs) has proven safe and effective in treating type 2 diabetes mellitus. Currently, biogenic silver nanoparticles have gained importance as safe and efficient antiglycation agents. Therapeutic s

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21

Aliyu, M., Z. M. Bonomi, and A. S. Idoko. "Dietary phytochemicals targeting Nf-<i>K</i>B signalling pathways: Potential cancer chemoprevention strategy." Dutse Journal of Pure and Applied Sciences 9, no. 2a (2023): 179–90. http://dx.doi.org/10.4314/dujopas.v9i2a.18.

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Chemoprevention is an approach involving the use of natural or synthetic substances to prevent the risk of development many diseases including cancer. Nuclear factor–kappa B (NF-kB) signaling pathways is crucial in either inducing processes of inflammation and apoptosis. As a result, it is implicated in numerous stages of carcinogenesis through collaboration with several signaling pathways and molecules. This transcription factor may be regarded as key target for cancer chemoprevention. Phytochemicals available in food as well as green plants have been demonstrated to have cancer protection ac

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22

Ousji, Ons, and Lekha Sleno. "Structural Elucidation of Novel Stable and Reactive Metabolites of Green Tea Catechins and Alkyl Gallates by LC-MS/MS." Antioxidants 11, no. 9 (2022): 1635. http://dx.doi.org/10.3390/antiox11091635.

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Synthetic gallic acid derivatives are employed as additives in food, personal care products, and pharmaceutical formulations. Despite their widespread use, little is known about their human exposure, health effects, and metabolism. Green tea catechins are natural antioxidants, known for their health-promoting properties, and are also employed as food additives or in personal care products. The objective of this study was to establish metabolic pathways involved in the biotransformation of green tea catechins and synthetic gallate esters. Liquid chromatography coupled with high-resolution tande

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23

Jeon, Jong-Rok, Petr Baldrian, Kumarasamy Murugesan, and Yoon-Seok Chang. "Laccase-catalysed oxidations of naturally occurring phenols: from in vivo biosynthetic pathways to green synthetic applications." Microbial Biotechnology 5, no. 3 (2011): 318–32. http://dx.doi.org/10.1111/j.1751-7915.2011.00273.x.

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24

Arcadi, Antonio, Valerio Morlacci, and Laura Palombi. "Synthesis of Nitrogen-Containing Heterocyclic Scaffolds through Sequential Reactions of Aminoalkynes with Carbonyls." Molecules 28, no. 12 (2023): 4725. http://dx.doi.org/10.3390/molecules28124725.

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Sequential reactions of aminoalkynes represent a powerful tool to easily assembly biologically important polyfunctionalized nitrogen heterocyclic scaffolds. Metal catalysis often plays a key role in terms of selectivity, efficiency, atom economy, and green chemistry of these sequential approaches. This review examines the existing literature on the applications of reactions of aminoalkynes with carbonyls, which are emerging for their synthetic potential. Aspects concerning the features of the starting reagents, the catalytic systems, alternative reaction conditions, pathways and possible inter

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Reis, Ana Rita, Nuno Viduedo, Daniel Raydan, and Maria Manuel B. Marques. "Bimetallic (or Multimetallic) Synthesis of N-Heterocycles." Catalysts 13, no. 9 (2023): 1268. http://dx.doi.org/10.3390/catal13091268.

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Bimetallic (or multimetallic) catalysis has emerged as a powerful tool in modern chemical synthesis, offering improved reaction control and versatility. This review focuses on the recent developments in bimetallic sequential catalysis for the synthesis of nitrogen heterocycles, which are essential building blocks in pharmaceuticals and fine chemicals. The cooperative action of two (sometimes more) different metal catalysts enables intricate control over reaction pathways, enhancing the selectivity and efficiency of the synthesis of N-heterocyclic compounds. By activating less reactive substrat

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26

Sharma, Sachin, Gaurav Joshi, Sourav Kalra, Sandeep Singh, and Raj Kumar. "Synthetic Versus Enzymatic Pictet-Spengler Reaction: An Overview." Current Organic Synthesis 15, no. 7 (2018): 924–39. http://dx.doi.org/10.2174/1570179415666180613084014.

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Background: Pictet-Spengler reactions is an irreplaceable part of cyclization reaction leading to the formation of indispensable heterocyclic moieties including imidazole, benzoxazole, pyrrole, indole and others having immense biological and chemical significance. Researchers have explored this reaction using different types of catalysts and reactions conditions (including solvents, acids, etc.) to ensure the better selectivity, less reaction time and high product yields. A total of five Pictet-Spenglerases have been discovered from various sources including plants, animals, fungi, and microbe

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Bociort, Flavia, Adelina Cheveresan, Razvan Dragoi, et al. "Green and Synthetic Metallic Nanoparticles - Obtaining, Characterization and Biological Evaluation in Association with Lupeol." Revista de Chimie 71, no. 5 (2020): 299–304. http://dx.doi.org/10.37358/rc.20.5.8137.

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The field of metal nanotechnology continues to draw the attention of researchers from different areas due to the outstanding properties of nanoparticles. The main aims of this research were to obtain and to study two types of gold nanoparticles; different obtaining pathways (the chemical synthesis and the biosynthesis based on an aqueous extract of lemon balm) were involved in this research. The chemically synthesized nanoparticles were loaded with lupeol. After a preliminary physico-chemical characterization, the compounds obtained were tested in order to evaluate the effects on the viability

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28

Tundo, Pietro. "Preface." Pure and Applied Chemistry 84, no. 3 (2012): vi. http://dx.doi.org/10.1351/pac20128403vi.

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The first Special Topic issue devoted to green chemistry was published in Pure and Applied Chemistry in July 2000 [Pure Appl. Chem.72, 1207-1403 (2000)]. Since then, three collections of works have been published, arising from the recently launched IUPAC series of International Conferences on Green Chemistry:- 1st International Conference on Green Chemistry (ICGC-1), Dresden, Germany, 10-15 September 2006: Pure Appl. Chem.79, 1833-2100 (2007)- 2nd International Conference on Green Chemistry (ICGC-2), Moscow, Russia, 14-20 September 2008: Pure Appl. Chem.81, 1961-2129 (2009)- 3rd International

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Tarnowicz-Ligus, Stanisława, and Anna Trzeciak. "Heck Transformations of Biological Compounds Catalyzed by Phosphine-Free Palladium." Molecules 23, no. 9 (2018): 2227. http://dx.doi.org/10.3390/molecules23092227.

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The development and optimization of synthetic methods leading to functionalized biologically active compounds is described. Two alternative pathways based on Heck-type reactions, employing iodobenzene or phenylboronic acid, were elaborated for the arylation of eugenol and estragole. Cinnamyl alcohol was efficiently transformed to saturated arylated aldehydes in reaction with iodobenzene using the tandem arylation/isomerization sequential process. The arylation of cinnamyl alcohol with phenylboronic acid mainly gave unsaturated alcohol, while the yield of saturated aldehyde was much lower. Cata

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Rozzi, Elena, Francesco Demetrio Minuto, Andrea Lanzini, and Pierluigi Leone. "Green Synthetic Fuels: Renewable Routes for the Conversion of Non-Fossil Feedstocks into Gaseous Fuels and Their End Uses." Energies 13, no. 2 (2020): 420. http://dx.doi.org/10.3390/en13020420.

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Innovative renewable routes are potentially able to sustain the transition to a decarbonized energy economy. Green synthetic fuels, including hydrogen and natural gas, are considered viable alternatives to fossil fuels. Indeed, they play a fundamental role in those sectors that are difficult to electrify (e.g., road mobility or high-heat industrial processes), are capable of mitigating problems related to flexibility and instantaneous balance of the electric grid, are suitable for large-size and long-term storage and can be transported through the gas network. This article is an overview of th

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Cascione, Mariafrancesca, Loris Rizzello, Daniela Manno, Antonio Serra, and Valeria De Matteis. "Green Silver Nanoparticles Promote Inflammation Shutdown in Human Leukemic Monocytes." Materials 15, no. 3 (2022): 775. http://dx.doi.org/10.3390/ma15030775.

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The use of silver nanoparticles (Ag NPs) in the biomedical field deserves a mindful analysis of the possible inflammatory response which could limit their use in the clinic. Despite the anti-cancer properties of Ag NPs having been widely demonstrated, there are still few studies concerning their involvement in the activation of specific inflammatory pathways. The inflammatory outcome depends on the synthetic route used in the NPs production, in which toxic reagents are employed. In this work, we compared two types of Ag NPs, obtained by two different chemical routes: conventional synthesis usi

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Matsuda, Kazuhiko. "Chemical and biological studies of natural and synthetic products for the highly selective control of pest insect species." Bioscience, Biotechnology, and Biochemistry 86, no. 1 (2021): 1–11. http://dx.doi.org/10.1093/bbb/zbab187.

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ABSTRACT Tanacetum cinerariifolium was known to produce pyrethrins, but the mechanism of pyrethrin biosynthesis was largely unclear. The author showed that the nonmevalonate and oxylipin pathways underlie biosynthesis of the acid and alcohol moieties, respectively, and a GDSL lipase joins the products of these pathways. A blend of the green leaf volatiles and (E)-β-farnesene mediates the induction of wounding responses to neighboring intact conspecies by enhancing pyrethrin biosynthesis. Plants fight against herbivores underground as well as aboveground, and, in soy pulps, some fungi produce c

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Leite, Marina M., and Flavio M. Vichi. "Influence of synthesis route on the morphology of SrTiO3 particles." MRS Proceedings 1552 (2013): 51–57. http://dx.doi.org/10.1557/opl.2013.967.

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ABSTRACTThe cubic perovskite SrTiO3 is an important semiconductor oxide with a band gap of 3.2 eV. It has a wide variety of applications such as: dielectric materials, photoluminescent devices, and in photocatalysis. It is conventionally obtained by the classic solid state synthesis (SS), in which TiO2 and SrCO3 react for several hours at temperatures as high as 1200 °C. Besides the high energy demand, SS is not useful for the control of physical characteristics, such as particle size and morphology, which has become essential for some of its applications. It is known that many soft and green

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Martin, J. Lemuel, and S. Viswanathan. "Feasibility of Green Hydrogen-Based Synthetic Fuel as a Carbon Utilization Option: An Economic Analysis." Energies 16, no. 17 (2023): 6399. http://dx.doi.org/10.3390/en16176399.

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Singapore has committed to achieving net zero emissions by 2050, which requires the pursuit of multiple decarbonization pathways. CO2 utilization methods such as fuel production may provide a fast interim solution for carbon abatement. This paper evaluates the feasibility of green hydrogen-based synthetic fuel (synfuel) production as a method for utilizing captured CO2. We consider several scenarios: a baseline scenario with no changes, local production of synfuel with hydrogen imports, and overseas production of synfuel with CO2 exports. This paper aims to determine a CO2 price for synfuel pr

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Kost, Christoph, Julian Brandes, Charlotte Senkpiel, Philip Sterchele, Daniel Wrede, and Hans-Martin Henning. "Modeling of Persistence, Non-Acceptance and Sufficiency in Long-Term Energy Scenarios for Germany." Energies 14, no. 15 (2021): 4484. http://dx.doi.org/10.3390/en14154484.

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Long-term transition pathways to a low-carbon energy system are analysed by applying the energy system model REMod. All in all, the paper contributes to the current research through an innovative scenario approach, using assumptions for societal trends and quantitative results for scenarios, analysing the paths towards climate neutrality and defossilization in 2050. In the case study of Germany, these trends and drivers influence the results and the technology composition in each consumption sector (buildings, transport, and industry). Across all scenarios, it can be observed that the electrif

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Mouhib, Mohammed, Melania Reggente, Lin Li, Nils Schuergers, and Ardemis Anoush Boghossian. "Engineering Extracellular Electron Transfer in Escherichia coli for Microbial Electrochemical Devices." ECS Meeting Abstracts MA2022-01, no. 43 (2022): 1857. http://dx.doi.org/10.1149/ma2022-01431857mtgabs.

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Microbes hold great potential for green electrochemical synthesis as well as bio-electricity generation from organic waste. The key to the successful development of microbial electrochemical devices lies with the ability of the microbes to transport electrons across their outer membranes. These devices thus often rely on the use of microbes known as exoelectrogens, which include bacteria that have evolved metabolic pathways that enable extracellular electron transfer (EET) to solid substrates for cellular respiration. While exoelectrogens demonstrate facilitated electron transfer with the elec

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Murray, Janet M., and Douglas I. Johnson. "Isolation and Characterization of Nrf1p, a Novel Negative Regulator of the Cdc42p GTPase in Schizosaccharomyces pombe." Genetics 154, no. 1 (2000): 155–65. http://dx.doi.org/10.1093/genetics/154.1.155.

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Abstract The Cdc42p GTPase and its regulators, such as the Saccharomyces cerevisiae Cdc24p guanine-nucleotide exchange factor, control signal-transduction pathways in eukaryotic cells leading to actin rearrangements. A cross-species genetic screen was initiated based on the ability of negative regulators of Cdc42p to reverse the Schizosaccharomyces pombe Cdc42p suppression of a S. cerevisiae cdc24ts mutant. A total of 32 S. pombe nrf (negative regulator of Cdc forty two) cDNAs were isolated that reversed the suppression. One cDNA, nrf1+, encoded an ~15 kD protein with three potential transmemb

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Ogbe, Emmanuel, Ali Almansoori, Michael Fowler, and Ali Elkamel. "Optimizing Renewable Injection in Integrated Natural Gas Pipeline Networks Using a Multi-Period Programming Approach." Energies 16, no. 6 (2023): 2631. http://dx.doi.org/10.3390/en16062631.

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In this paper, we propose an optimization model that considers two pathways for injecting renewable content into natural gas pipeline networks. The pathways include (1) power-to-hydrogen or PtH, where off-peak electricity is converted to hydrogen via electrolysis, and (2) power-to-methane, or PtM, where carbon dioxide from different source locations is converted into renewable methane (also known as synthetic natural gas, SNG). The above pathways result in green hydrogen and methane, which can be injected into an existing natural gas pipeline network. Based on these pathways, a multi-period ne

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Molden, Brent M., Kimberly A. Cooney, Kirk West, Lex H. T. Van Der Ploeg, and Giulia Baldini. "Temporal cAMP Signaling Selectivity by Natural and Synthetic MC4R Agonists." Molecular Endocrinology 29, no. 11 (2015): 1619–33. http://dx.doi.org/10.1210/me.2015-1071.

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Abstract The melanocortin-4 receptor (MC4R) is a G protein-coupled receptor expressed in the brain, where it controls energy balance through pathways including α-melanocyte-stimulating hormone (α-MSH)-dependent signaling. We have reported that the MC4R can exist in an active conformation that signals constitutively by increasing cAMP levels in the absence of receptor desensitization. We asked whether synthetic MC4R agonists differ in their ability to increase intracellular cAMP over time in Neuro2A cells expressing endogenous MC4R and exogenous, epitope-tagged hemagglutinin-MC4R-green fluoresc

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Komalavilas, Padmini, Raymond B. Penn, Charles R. Flynn, et al. "The small heat shock-related protein, HSP20, is a cAMP-dependent protein kinase substrate that is involved in airway smooth muscle relaxation." American Journal of Physiology-Lung Cellular and Molecular Physiology 294, no. 1 (2008): L69—L78. http://dx.doi.org/10.1152/ajplung.00235.2007.

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Activation of the cAMP/cAMP-dependent PKA pathway leads to relaxation of airway smooth muscle (ASM). The purpose of this study was to examine the role of the small heat shock-related protein HSP20 in mediating PKA-dependent ASM relaxation. Human ASM cells were engineered to constitutively express a green fluorescent protein-PKA inhibitory fusion protein (PKI-GFP) or GFP alone. Activation of the cAMP-dependent signaling pathways by isoproterenol (ISO) or forskolin led to increases in the phosphorylation of HSP20 in GFP but not PKI-GFP cells. Forskolin treatment in GFP but not PKI-GFP cells led

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Kamli, Majid Rasool, Vartika Srivastava, Nahid H. Hajrah, et al. "Phytogenic Fabrication of Ag–Fe Bimetallic Nanoparticles for Cell Cycle Arrest and Apoptosis Signaling Pathways in Candida auris by Generating Oxidative Stress." Antioxidants 10, no. 2 (2021): 182. http://dx.doi.org/10.3390/antiox10020182.

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Novel green synthetic nanomedicines have been recognized as alternative therapies with the potential to be antifungal agents. Apoptosis induction, cell cycle arrest and activation of the antioxidant defense system in fungal cells have also gained attention as emerging drug targets. In this study, a facile and biodegradable synthetic route was developed to prepare Ag–Fe bimetallic nanoparticles using aqueous extract of Beta vulgaris L. Surface plasmon resonance of Beta vulgaris-assisted AgNPs nanoparticles was not observed in the UV-visible region of Ag–Fe bimetallic NPs, which confirms the for

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Mellor, Silas Busck, James B. Y. H. Behrendorff, Agnieszka Zygadlo Nielsen, Poul Erik Jensen, and Mathias Pribil. "Non-photosynthetic plastids as hosts for metabolic engineering." Essays in Biochemistry 62, no. 1 (2018): 41–50. http://dx.doi.org/10.1042/ebc20170047.

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Using plants as hosts for production of complex, high-value compounds and therapeutic proteins has gained increasing momentum over the past decade. Recent advances in metabolic engineering techniques using synthetic biology have set the stage for production yields to become economically attractive, but more refined design strategies are required to increase product yields without compromising development and growth of the host system. The ability of plant cells to differentiate into various tissues in combination with a high level of cellular compartmentalization represents so far the most une

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Stephenson, Michael J., and Anne Osbourn. "Making drugs out of sunlight and ‘thin air’: an emerging synergy of synthetic biology and natural product chemistry." Biochemist 42, no. 4 (2020): 34–39. http://dx.doi.org/10.1042/bio20200044.

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Nature has long served as a rich source of structurally diverse small organic molecules with medicinally relevant biological activities. Despite the historical success of these so-called natural products, the enthusiasm of big pharma to explore these compounds as leads in drug design has waxed and waned. A major contributor to this is their often inherent structural complexity. Such compounds are difficult (often impossible) to access synthetically, a hurdle that can stifle lead development and hinder sustainable large-scale production of promising leads for clinical evaluation. However, in re

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Filippi, Alexandru, Oana-Alina Ciolac, Constanța Ganea, and Maria-Magdalena Mocanu. "ErbB Proteins as Molecular Target of Dietary Phytochemicals in Malignant Diseases." Journal of Oncology 2017 (2017): 1–20. http://dx.doi.org/10.1155/2017/1532534.

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ErbB proteins overexpression, in both normal and mutated forms, is associated with invasive forms of cancer prone to metastasis and with stronger antiapoptotic mechanisms and therefore more challenging to treat. Downstream effectors of ErbB receptors mediating these phenotypic traits include MAPK, STAT, and PI3K/AKT/mTOR pathways. Various phytochemical compounds were studied for their large number of biological effects including anticancer activity. Among these compounds, epigallocatechin-3-gallate (EGCG), the main catechin from green tea leaves, and curcumin, component of the curry powder, co

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Shaheen, Saman, Syed Asim Ali, Umar Farooq Mir, Iqra Sadiq, and Tokeer Ahmad. "Recent Advances in Transition Metal Phosphide Nanocatalysts for H2 Evolution and CO2 Reduction." Catalysts 13, no. 7 (2023): 1046. http://dx.doi.org/10.3390/catal13071046.

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Green hydrogen energy has captivated researchers and is regarded as a feasible option for future energy-related aspirations. The emerging awareness of renewable energy-driven hydrogen generation and carbon dioxide reduction calls for the use of unconventional schematic tools in the fabrication of nanocatalyst systems. Transition metal phosphides are state-of-art, cost-effective, noble-metal-free materials that have been comprehensively examined for sustainable energy-driven applications. Recent reports on these advanced functional materials have cemented their candidature as high-performance c

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Singh, Apurva Anand, Gunasekaran Rajeswari, Louis Anto Nirmal, and Samuel Jacob. "Synthesis and extraction routes of allelochemicals from plants and microbes: A review." Reviews in Analytical Chemistry 40, no. 1 (2021): 293–311. http://dx.doi.org/10.1515/revac-2021-0139.

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Abstract Allelopathy, a complex phenomenon has unveiled both stimulatory and inhibitory effects in plant processes that are mediated by the release of certain chemical compounds commonly known as allelochemicals. Allelochemicals, a form of bioactive secondary metabolites are produced by a diverse group of plants and microbes in response to biotic and abiotic stress. It ranges from a simple hydrocarbon to complex polycyclic aromatic compounds like phenol, flavonoids, tannins, steroids, amino acids, alkaloids and quinones. These plant bioactive compounds are released into the environment via dec

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Marchetto, Francesca, Marco Roverso, Davide Righetti, et al. "Bioremediation of Per- and Poly-Fluoroalkyl Substances (PFAS) by Synechocystis sp. PCC 6803: A Chassis for a Synthetic Biology Approach." Life 11, no. 12 (2021): 1300. http://dx.doi.org/10.3390/life11121300.

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One of the main concerns in industrialized countries is represented by per- and poly-fluoroalkyl substances (PFAS), persistent contaminants hardly to be dealt with by conventional wastewater treatment processes. Phyco-remediation was proposed as a green alternative method to treat wastewater. Synechocystis sp. PCC6803 is a unicellular photosynthetic organism candidate for bioremediation approaches based on synthetic biology, as it is able to survive in a wide range of polluted waters. In this work, we assessed the possibility of applying Synechocystis in PFAS-enriched waters, which was never r

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TOMULESCU, CATERINA, MIȘU MOSCOVICI, IRINA LUPESCU, ROXANA MĂDĂLINA STOICA, and ADRIAN VAMANU. "A Review: Klebsiella pneumoniae, Klebisellaoxytoca and Biotechnology." Romanian Biotechnological Letters 26, no. 3 (2021): 2567–86. http://dx.doi.org/10.25083/rbl/26.3/2567.2586.

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Biotechnology, molecular biology and genetic engineering, and bioprospecting play a crucial role in our common future, enabling industrially important microorganisms to ensure sustainable products (fuels, chemicals, pharmaceuticals, food, drug delivery systems, medical devices etc.) and new bioeconomic opportunities. Biotechnological applications are able to provide cost-effective green alternatives to conventional industrial processes, which are currently affecting the nature and biodiversity. Klebsiella species are among the well-studied microbes both in medicine field, as ones of the most r

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Xu, Xueyan, Jun Gao, Zhonghao Zhang, and Jing Fu. "An Assessment of Chinese Pathways to Implement the UN Sustainable Development Goal-11 (SDG-11)—A Case Study of the Yangtze River Delta Urban Agglomeration." International Journal of Environmental Research and Public Health 16, no. 13 (2019): 2288. http://dx.doi.org/10.3390/ijerph16132288.

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Urban sustainability is a crucial part of the United Nations (UN) Sustainable Development Goals (SDGs) and one of the core objectives of China’s national strategy to promote new urbanization and achieve integration in the Yangtze River Delta (YRD). This paper mainly focused on the 11th SDG, which is a universal call to make cities and human settlements inclusive, safe, resilient and sustainable. The full permutation polygon synthetic indicator (FPPSI) method was applied to synthetically evaluate the sustainable level of 26 cities in the YRD urban agglomeration from 2007 to 2016. The results sh

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Gao, Yang, Wei Xiong, Ming J. He, Li Tang, Jin Y. Xiang, and Qing Y. Wu. "Action Spectra of Chlorophyll a Biosynthesis in Cyanobacteria: Dark-Operative Protochlorophyllide Oxidoreductase-Deficient Mutants." Zeitschrift für Naturforschung C 64, no. 1-2 (2009): 117–24. http://dx.doi.org/10.1515/znc-2009-1-219.

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Both light-dependent and light-independent (dark) protochlorophyllide (Pchlide) reductase account for catalyzing the reduction of Pchlide to chlorophyllide during the biosynthesis of Mg-tetrapyrrole pigments in cyanobacteria. To gain more insight into the interaction between the wavelength of the light and these two chlorophyll synthetic pathways in Synechocystis sp. PCC 6803, the spectral effectiveness of the formation of chlorophyll a was investigated during the regreening process in chlL- and chlN- mutants, which could not synthesize chlorophyll during growth in the dark. The action spectra

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