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Articles de revues sur le sujet « Carboxylates platform »

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Auteur : Grafiati
Publié le 11 mars 2023

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1

Zhu, Yun-Pei, Tie-Zhen Ren et Zhong-Yong Yuan. « Mesoporous non-siliceous inorganic–organic hybrids : a promising platform for designing multifunctional materials ». New J. Chem. 38, no 5 (2014) : 1905–22. http://dx.doi.org/10.1039/c3nj01139a.

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An overview of the recent progress in the designed synthesis, modification and multifunctional applications of mesoporous non-siliceous inorganic–organic hybrid materials including metal phosphonates, carboxylates and sulfonates is presented.
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Layton, Donovan S., et Cong T. Trinh. « Microbial synthesis of a branched-chain ester platform from organic waste carboxylates ». Metabolic Engineering Communications 3 (décembre 2016) : 245–51. http://dx.doi.org/10.1016/j.meteno.2016.08.001.

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Bury, Wojciech, Iwona Justyniak, Daniel Prochowicz, Zbigniew Wróbel et Janusz Lewiński. « Oxozinc carboxylates : a predesigned platform for modelling prototypical Zn-MOFs' reactivity toward water and donor solvents ». Chemical Communications 48, no 59 (2012) : 7362. http://dx.doi.org/10.1039/c2cc33094f.

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Sánchez, Daniel, Susana Morcelle, María Fait, Gabriela Tonetto et María Ferreira. « Application of a Multienzymatic System from Natural Latex in Key Reactions for oil-Based Biorefineries ». Fermentation 5, no 1 (2 février 2019) : 18. http://dx.doi.org/10.3390/fermentation5010018.

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Oil-based biorefineries play a crucial role in the production of key platform chemicals that can be generated via biotechnological processes instead of a petrochemical route. This work focuses on the latex of the fruit of Araujia sericifera, which can be considered a multienzymatic system with applications in key reactions in oil-based biorefineries. The latex of Araujia sericifera (ASL) was used as a novel biocatalyst in the esterification of oleic acid and in the hydrolysis of triglycerides and p-nitrophenyl carboxylates. When ASL was compared to a commercial biocatalyst, it showed an excellent activity in the hydrolysis of soybean oil and p-nitropheyl laurate, and a comparable activity in the esterification reaction.
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Niedbała, Patryk, Kajetan Dąbrowa, Agnieszka Cholewiak-Janusz et Janusz Jurczak. « Solution and Solid State Studies of Urea Derivatives of DITIPIRAM Acting as Powerful Anion Receptors ». Molecules 26, no 6 (22 mars 2021) : 1788. http://dx.doi.org/10.3390/molecules26061788.

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Herein, we present the synthesis and anion binding studies of a family of homologous molecular receptors 4–7 based on a DITIPIRAM (8-propyldithieno-[3,2-b:2′,3′-e]-pyridine-3,5-di-amine) platform decorated with various urea para-phenyl substituents (NO2, F, CF3, and Me). Solution, X-ray, and DFT studies reveal that the presented host–guest system offers a convergent array of four urea NH hydrogen bond donors to anions allowing the formation of remarkably stable complexes with carboxylates (acetate, benzoate) and chloride anions in solution, even in competitive solvent mixtures such as DMSO-d6/H2O 99.5/0.5 (v/v) and DMSO-d3/MeOH-d3 9:1 (v/v). The most effective derivatives among the series turned out to be receptors 5 and 6 containing electron-withdrawing F- and -CF3para-substituents, respectively.
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Jagleniec, Damian, Krzysztof Ziach, Kajetan Dąbrowa et Jan Romański. « The Effect of Substitution Pattern on Binding Ability in Regioisomeric Ion Pair Receptors Based on an Aminobenzoic Platform ». Molecules 24, no 16 (18 août 2019) : 2990. http://dx.doi.org/10.3390/molecules24162990.

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A series of ditopic ion pair receptors equipped with 4-nitrophenylurea and 1-aza-18-crown-6-ether linked by ortho-(1), meta-(2), and para-(3) substituted benzoic acid were readily synthesized in three steps from commercially available materials. The binding properties of these regioisomeric receptors were determined using UV-vis and 1H NMR spectroscopy in MeCN and in the solid state by single-crystal X-ray diffraction crystallography. The solution studies revealed that, apart from carboxylates, all the anions tested formed stronger complexes in the presence of sodium cations. Receptors 2 and 3 were found to interact with ion pairs with remarkably higher affinity than ortho-substituted 1. 1H NMR titration experiments showed that both urea NH protons interacted with anions with comparable strength in the case of receptors 2 and 3, but only one of the NHs was effective in anion binding in the case of receptor 1. X-ray analysis of the crystal structure of receptor 1 and 1·NaPF6 complex showed that binding was hampered due to the formation of an intramolecular hydrogen bond. Analysis of the crystal structures of 2·NaBr and 3·NaBr complexes revealed that proper mutual orientation of binding domains was responsible for the improved binding of the sodium salts.
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Jagleniec, Damian, Natalia Walczak, Łukasz Dobrzycki et Jan Romański. « Utilizing an Amino Acid Scaffold to Construct Heteroditopic Receptors Capable of Interacting with Salts under Interfacial Conditions ». International Journal of Molecular Sciences 22, no 19 (5 octobre 2021) : 10754. http://dx.doi.org/10.3390/ijms221910754.

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A 4-nitro-L-phenylalanine scaffold was used to construct effective ion pair receptors capable of binding anions in an enhanced manner with the assistance of alkali metal cations. A benzocrown ether was linked to a receptor platform via the amide function so as to support the squaramide function in anion binding and to allow all three NHs to act simultaneously. The binding properties of the receptors were determined using UV-vis, 1H NMR, 2D NMR, and DOSY spectroscopy in MeCN and in the solid state by X-ray measurements. Ion pair receptor 2 was found to interact with the most strongly with salts, and the removal of its key structural elements was shown to hinder the receptor action. The amide proton was recognized to switch from having involvement in an intramolecular hydrogen bond to interacting with anions upon complexation. Apart from carboxylates, which promote deprotonation, and other monovalent salts creating 1:1 complexes with the receptor, more complex equilibria were established upon the complexation of 2 with sulfates. Receptor 2 was shown to be capable of the extraction of ion pairs from the aqueous to organic phase and of the cation-enhanced transport chloride and sulfate anions across a bulk chloroform membrane. These features may open the door for its use in regulating ion concertation under interfacial conditions and acting as a potential drug to treat channelopathies.
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Holtzapple, Mark T., et Cesar B. Granda. « Carboxylate Platform : The MixAlco Process Part 1 : Comparison of Three Biomass Conversion Platforms ». Applied Biochemistry and Biotechnology 156, no 1-3 (6 janvier 2009) : 95–106. http://dx.doi.org/10.1007/s12010-008-8466-y.

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Chwiałkowska, Joanna. « Carboxylate platform. Production and use of volatile fatty acids Platforma karboksylowa. Produkcja i wykorzystanie lotnych kwasów tłuszczowych ». PRZEMYSŁ CHEMICZNY 1, no 4 (5 avril 2016) : 122–30. http://dx.doi.org/10.15199/62.2016.4.17.

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Levi, Francis, Raphael Saffroy, Abdoulaye Karaboue, Christophe Desterke, Valerie Boige, Mohamed Hebbar, Denis Michel Smith et al. « Vitamin K epoxide reductase complex subunit 1 (VKORC1) : A pharmacogenomic predictor of response and survival in patients (pts) on triplet hepatic artery infusion (HAI) and intravenous cetuximab (IV-Cet) for initially unresectable liver metastases from colorectal cancer (uLM-CRC) (EU trial OPTILIV). » Journal of Clinical Oncology 35, no 15_suppl (20 mai 2017) : 2569. http://dx.doi.org/10.1200/jco.2017.35.15_suppl.2569.

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2569 Background: The HAI of Irinotecan-Oxaliplatin-5-Fluorouracil (IFO) with IV-Cet achieved 29.7% complete uLM-CRC resections (R0+R1) and an overall median survival (OS) of 25.7 months in previously treated pts (Lévi, Ann Oncol 2016). Methods: To identify pharmacogenomic predictors of outcomes, 207 single nucleotide polymorphisms (SNPs) from 34 pharmacology genes were analysed in blood mononuclear cells (ADME PGx, MassArray platform, Sequenom, USA). Relations between SNPs and tumor response, R0+R1, survival, and toxicities were tested using adjusted Mann Whitney, Fisher Exact, Log Rank tests and Hardy-Weinberg Equilibrium. Results: Pts (16F;36M; 33-76 yo; WHO performance status 0-1) received protocol treatment as 2nd (21 pts) or 3-4thline (31 pts). VKORC1 SNPs in promoter (rs9923231) and intron (rs9934438) were consistently associated with early and objective responses, and overall survival. For rs9923231, T/T (N = 8) as compared to C/T (N = 21) had greatest chance of achieving early response (50% vs 5%, p = 0.029) or 4-y survival (46% vs 0%, p = 0.006). VKORC1 SNPs also related to HA thrombosis (rs992331, T/T, 77% vs C/C, 30%, p = 0.04). In contrast, NAT2 SNPs (rs1041983 and rs1801280) were associated with up to 5-fold differences in R0-R1 resection rate. Statistically significant associations (p < 0.05) of SNPs with clinical outcomes were found for oxydo-reduction (CYP2E1 and HA thrombosis; CYP2C9 and diarrhea; CYP2C19 and diarrhea, fatigue, and early response), conjugation (UGT1A1 and diarrhea; NAT2 and fatigue); and transport (ABCB1 or SLC0B3 and neutropenia; SLC22A1 and diarrhea; SLC 15A2 and early response). Conclusions: VKORC1 was highlighted for the first time, as a pharmacogenomic predictor of HAI efficacy for LM-CRC. Conversion-to-resection was associated with NAT2 polymorphism. VKORC1 γ-carboxylates vitamin K-dependent proteins. Its polymorphism guides personalized warfarin dosing. VKORC1 SNPs determination could help identify the uLM-CRC pts who best benefit from intensive HAI therapy. Clinical trial information: NCT00852228.
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Han, Tingting, Yang Huang, Chong Sun, Daoying Wang et Weimin Xu. « A Water-Dispersible Carboxylated Carbon Nitride Nanoparticles-Based Electrochemical Platform for Direct Reporting of Hydroxyl Radical in Meat ». Foods 11, no 1 (24 décembre 2021) : 40. http://dx.doi.org/10.3390/foods11010040.

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In this paper, carboxylated carbon nitride nanoparticles (carboxylated-g-C3N4 NPs) were prepared through a one-step molten salts method. The synthesized material was characterized by transmission electron microscope (TEM), Fourier transform-infrared spectra (FTIR), and X-ray photoelectron spectroscopy (XPS), etc. An electrochemical sensor based on single-stranded oligonucleotide/carboxylated-g-C3N4/chitosan/glassy carbon electrode (ssDNA/carboxylated-g-C3N4/chitosan/GCE) was constructed for determination of the hydroxyl radical (•OH), and methylene blue (MB) was used as a signal molecule. The sensor showed a suitable electrochemical response toward •OH from 4.06 to 122.79 fM with a detection limit of 1.35 fM. The selectivity, reproducibility, and stability were also presented. Application of the sensor to real meat samples (i.e., pork, chicken, shrimp, and sausage) was performed, and the results indicated the proposed method could be used to detect •OH in practical samples. The proposed sensor holds a great promise to be applied in the fields of food safety.
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Xing, Gengqi, Cheng Wang, Ke Liu, Bin Luo, Peichen Hou, Xiaodong Wang, Hongtu Dong, Jianshu Wang et Aixue Li. « A probe-free electrochemical immunosensor for methyl jasmonate based on a Cu-MOF–carboxylated graphene oxide platform ». RSC Advances 12, no 26 (2022) : 16688–95. http://dx.doi.org/10.1039/d1ra07683c.

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Fédèle, Lionel, Frédéric Sauvage et Matthieu Bécuwe. « Hyper-conjugated lithium carboxylate based on a perylene unit for high-rate organic lithium-ion batteries ». J. Mater. Chem. A 2, no 43 (2014) : 18225–28. http://dx.doi.org/10.1039/c4ta02293a.

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Wang, Luyu, Bing Wang et Jia Song. « A carboxylated cellulose aerogel for the rapid detection of aniline vapor ». RSC Advances 12, no 36 (2022) : 23169–75. http://dx.doi.org/10.1039/d2ra03641j.

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Karunarathne, Sampath A., et G. Peter van Walsum. « Integrating the Carboxylate Platform into a Red Seaweed Biorefinery ». Applied Biochemistry and Biotechnology 194, no 3 (18 octobre 2021) : 1235–58. http://dx.doi.org/10.1007/s12010-021-03699-2.

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Granda, Cesar B., Mark T. Holtzapple, Gary Luce, Katherine Searcy et Darryl L. Mamrosh. « Carboxylate Platform : The MixAlco Process Part 2 : Process Economics ». Applied Biochemistry and Biotechnology 156, no 1-3 (28 janvier 2009) : 107–24. http://dx.doi.org/10.1007/s12010-008-8481-z.

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Duber, Anna, Lukasz Jaroszynski, Roman Zagrodnik, Joanna Chwialkowska, Wojciech Juzwa, Slawomir Ciesielski et Piotr Oleskowicz-Popiel. « Exploiting the real wastewater potential for resource recovery –n-caproate production from acid whey ». Green Chemistry 20, no 16 (2018) : 3790–803. http://dx.doi.org/10.1039/c8gc01759j.

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Gonzales, Junior, N. V. S. Dinesh K. Bhupathiraju, William Perea, Huong Chu, Naxhije Berisha, Veronica Bueno, Naser Dodic, Julia Rozenberg, Nancy L. Greenbaum et Charles Michael Drain. « Facile synthesis of chlorin bioconjugates by a series of click reactions ». Chemical Communications 53, no 26 (2017) : 3773–76. http://dx.doi.org/10.1039/c7cc01265a.

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Wu, Qiaoling, Chun Ji, Lingli Zhang, Qili Shi, Yuangen Wu et Han Tao. « A simple sensing platform based on a 1T@2H-MoS2/cMWCNTs composite modified electrode for ultrasensitive detection of illegal Sudan I dye in food samples ». Analytical Methods 14, no 5 (2022) : 549–59. http://dx.doi.org/10.1039/d1ay01775f.

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Based on the synergistic electrocatalysis effect of 1T@2H-MoS2 nanosheets and carboxylated carbon nanotubes (cMWCNTs), a simple electrochemical sensing platform was established for the highly sensitive detection of Sudan I.
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Magdalena et González-Fernández. « Microalgae Biomass as a Potential Feedstock for the Carboxylate Platform ». Molecules 24, no 23 (2 décembre 2019) : 4404. http://dx.doi.org/10.3390/molecules24234404.

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Volatile fatty acids (VFAs) are chemical building blocks for industries, and are mainly produced via the petrochemical pathway. However, the anaerobic fermentation (AF) process gives a potential alternative to produce these organic acids using renewable resources. For this purpose, waste streams, such as microalgae biomass, might constitute a cost-effective feedstock to obtain VFAs. The present review is intended to summarize the inherent potential of microalgae biomass for VFA production. Different strategies, such as the use of pretreatments to the inoculum and the manipulation of operational conditions (pH, temperature, organic loading rate or hydraulic retention time) to promote VFA production from different microalgae strains, are discussed. Microbial structure analysis using microalgae biomass as a substrate is pointed out in order to further comprehend the roles of bacteria and archaea in the AF process. Finally, VFA applications in different industry fields are reviewed.
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Agler, Matthew T., Brian A. Wrenn, Stephen H. Zinder et Largus T. Angenent. « Waste to bioproduct conversion with undefined mixed cultures : the carboxylate platform ». Trends in Biotechnology 29, no 2 (février 2011) : 70–78. http://dx.doi.org/10.1016/j.tibtech.2010.11.006.

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Darvekar, Pratik, et Mark T. Holtzapple. « Assessment of Shock Pretreatment of Corn Stover Using the Carboxylate Platform ». Applied Biochemistry and Biotechnology 178, no 6 (23 novembre 2015) : 1081–94. http://dx.doi.org/10.1007/s12010-015-1930-6.

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Arvand, M., S. Abbasnejad et N. Ghodsi. « Graphene quantum dots decorated with Fe3O4 nanoparticles/functionalized multiwalled carbon nanotubes as a new sensing platform for electrochemical determination of l-DOPA in agricultural products ». Analytical Methods 8, no 29 (2016) : 5861–68. http://dx.doi.org/10.1039/c6ay00836d.

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This paper describes the development and utilization of a new nanocomposite consisting of graphene quantum dots, magnetic nanoparticles and carboxylated multiwalled carbon nanotubes for glassy carbon electrode surface modification.
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Njokweni, Sesethu Gift, Annica Steyn, Marelize Botes, Marinda Viljoen-Bloom et Willem Heber van Zyl. « Potential Valorization of Organic Waste Streams to Valuable Organic Acids through Microbial Conversion : A South African Case Study ». Catalysts 11, no 8 (12 août 2021) : 964. http://dx.doi.org/10.3390/catal11080964.

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The notion of a “biobased economy” in the context of a developing country such as South Africa (SA) necessitates the development of technologies that utilize sustainable feedstocks, have simple and robust operations, are feasible at small scale and produce a variety of valuable bioproducts, thus fitting the biorefinery concept. This case study focuses on the microbial production of higher-value products from selected organic waste streams abundant in the South African agricultural sector using microbes adapted to utilize different parts of biomass waste streams. A ruminant-based carboxylate platform based on mixed or undefined anaerobic co-cultures of rumen microorganisms can convert the carbohydrate polymers in the lignocellulosic part of organic waste streams to carboxylic acids that can be upgraded to biofuels or green chemicals. Furthermore, yeast and fungi can convert the simpler carbohydrates (such as the sugars and malic acid in grape and apple pomace) to ethanol and high-value carboxylic acids, such as lactic, fumaric, succinic and citric acid. This review will discuss the combinational use of the ruminal carboxylate platform and native or recombinant yeasts to valorize biomass waste streams through the production of higher-value organic acids with various applications.
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Chonan, Tomomichi, Takahiro Oi, Daisuke Yamamoto, Miyoko Yashiro, Daisuke Wakasugi, Hiroaki Tanaka, Ayumi Ohoka-Sugita, Fusayo Io, Hiroko Koretsune et Akira Hiratate. « (4-Piperidinyl)-piperazine : A new platform for acetyl-CoA carboxylase inhibitors ». Bioorganic & ; Medicinal Chemistry Letters 19, no 23 (décembre 2009) : 6645–48. http://dx.doi.org/10.1016/j.bmcl.2009.10.012.

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Ong, Jun Xiang, Siew Qi Yap, Daniel Yuan Qiang Wong, Chee Fei Chin et Wee Han Ang. « Platinum(IV) Carboxylate Prodrug Complexes as Versatile Platforms for Targeted Chemotherapy ». CHIMIA International Journal for Chemistry 69, no 3 (25 mars 2015) : 100–103. http://dx.doi.org/10.2533/chimia.2015.100.

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Kohara, Kaori, Shinpei Yamamoto, Liis Seinberg, Tatsuya Murakami, Masahiko Tsujimoto, Tetsuya Ogawa, Hiroki Kurata, Hiroshi Kageyama et Mikio Takano. « Carboxylated SiO2-coated α-Fe nanoparticles : towards a versatile platform for biomedical applications ». Chemical Communications 49, no 25 (2013) : 2563. http://dx.doi.org/10.1039/c3cc39055a.

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Kucek, L. A., et L. T. Angenent. « The Carboxylate Platform : Conversion of Carbon-rich Wastes into Liquid Fuels and Chemicals ». Proceedings of the Water Environment Federation 2015, no 7 (1 janvier 2015) : 3067. http://dx.doi.org/10.2175/193864715819555841.

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Smith, A. D., M. Landoll, M. Falls et M. T. Holtzapple. « ChemInform Abstract : Chemical Production from Lignocellulosic Biomass : Thermochemical, Sugar and Carboxylate Platforms ». ChemInform 43, no 38 (23 août 2012) : no. http://dx.doi.org/10.1002/chin.201238278.

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Zor, Erhan, Ece Eksin, Mukerrem Findik, Haluk Bingol et Arzum Erdem. « Carboxylated-Graphene Decorated Pencil Graphite Electrode as a Platform for Voltammetric Detection of DNA ». Journal of The Electrochemical Society 164, no 13 (2017) : B723—B729. http://dx.doi.org/10.1149/2.1971713jes.

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Hollister, Emily B., Andrea K. Forrest, Heather H. Wilkinson, Daniel J. Ebbole, Stephanie A. Malfatti, Susannah G. Tringe, Mark T. Holtzapple et Terry J. Gentry. « Structure and dynamics of the microbial communities underlying the carboxylate platform for biofuel production ». Applied Microbiology and Biotechnology 88, no 1 (31 juillet 2010) : 389–99. http://dx.doi.org/10.1007/s00253-010-2789-7.

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Xiong, Boya, Tom L. Richard et Manish Kumar. « Integrated acidogenic digestion and carboxylic acid separation by nanofiltration membranes for the lignocellulosic carboxylate platform ». Journal of Membrane Science 489 (septembre 2015) : 275–83. http://dx.doi.org/10.1016/j.memsci.2015.04.022.

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Cruz, Clebson, Maron F. Anka, Mario S. Reis, Romain Bachelard et Alan C. Santos. « Quantum battery based on quantum discord at room temperature ». Quantum Science and Technology 7, no 2 (9 mars 2022) : 025020. http://dx.doi.org/10.1088/2058-9565/ac57f3.

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Abstract The study of advanced quantum devices for energy storage has attracted the attention of the scientific community in the past few years. Although several theoretical progresses have been achieved recently, experimental proposals of platforms operating as quantum batteries under ambient conditions are still lacking. In this context, this work presents a feasible realization of a quantum battery in a carboxylate-based metal complex, which can store a finite amount of extractable work under the form of quantum discord at room temperature, and recharge by thermalization with a reservoir. Moreover, the stored work can be evaluated through non-destructive measurements of the compound’s magnetic susceptibility. These results pave the way for the development of enhanced energy storage platforms through material engineering.
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Holtzapple, Mark T., Haoran Wu, Paul J. Weimer, Rachel Dalke, Cesar B. Granda, Jesse Mai et Meltem Urgun-Demirtas. « Microbial communities for valorizing biomass using the carboxylate platform to produce volatile fatty acids : A review ». Bioresource Technology 344 (janvier 2022) : 126253. http://dx.doi.org/10.1016/j.biortech.2021.126253.

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Cope, Julia L., Amy Jo M. Hammett, Elena A. Kolomiets, Andrea K. Forrest, Kristina W. Golub, Emily B. Hollister, Thomas J. DeWitt, Terry J. Gentry, Mark T. Holtzapple et Heather H. Wilkinson. « Evaluating the performance of carboxylate platform fermentations across diverse inocula originating as sediments from extreme environments ». Bioresource Technology 155 (mars 2014) : 388–94. http://dx.doi.org/10.1016/j.biortech.2013.12.105.

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Njokweni, Sesethu G., Paul J. Weimer, Lisa Warburg, Marelize Botes et Willem H. van Zyl. « Valorisation of the invasive species, Prosopis juliflora, using the carboxylate platform to produce volatile fatty acids ». Bioresource Technology 288 (septembre 2019) : 121602. http://dx.doi.org/10.1016/j.biortech.2019.121602.

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Baddam, Rakhi, et G. Peter van Walsum. « Acidogenic Digestion of Pre-pulping Extracts for Production of Fuels and Bioproducts Via Carboxylate Platform Processing ». Applied Biochemistry and Biotechnology 182, no 3 (11 janvier 2017) : 1076–94. http://dx.doi.org/10.1007/s12010-016-2383-2.

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Taco-Vasquez, Sebastian, et Mark T. Holtzapple. « Conversion of acetone and mixed ketones to hydrocarbons using HZSM-5 catalyst in the carboxylate platform ». PLOS ONE 17, no 11 (21 novembre 2022) : e0277184. http://dx.doi.org/10.1371/journal.pone.0277184.

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In this study, two different feeds were treated to produce hydrocarbons: (1) reagent-grade acetone, and (2) mixed ketones obtained from lignocellulosic biomass via the carboxylate platform. Acetone and mixed ketones underwent catalytic self-condensation over HZSM-5. For acetone, HZSM-5(80) was used, and the experiments were conducted in two sets: (1) vary temperature (305–415°C) at P = 101 kPa (abs) and weight hourly space velocity (WHSV) = 1.3 h–1; (2) vary WHSV (1.3–7.9 h–1) at T = 350 and 415°C, and P = 101 kPa (abs). For acetone over HZSM-5(280), the experiments were conducted in two sets: (1) vary WHSV (1.3–6.5 h–1) at T = 415°C, and P = 101 kPa (abs); and (2) vary WHSV (1.3–11.8 h–1) at P = 790 kPa (abs) and T = 415°C. For mixed ketones, HZSM-5(280) was used at WHSV = 1.9 h–1, T = 430–590°C, and P = 101 kPa (abs). For acetone at higher temperatures, the conversion was 100% and the liquid products were aromatics centered on C8. At low temperatures, conversion was less and the carbon liquid distribution was centered on C9 (mainly mesitylene). For mixed ketones, catalyst deactivation was higher causing product concentrations to change over time, and the highest conversion reached was 40%.
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39

Ravikumar, Krishnan, Balasubramanian Sridhar, Jagadeesh Babu Nanubolu, Govindaraju Karthik et Basi Venkata Subba Reddy. « Three structures of dispirooxindole derivatives generatedin situthrough a three-component one-pot strategy with complete regio- and stereoselectivity ». Acta Crystallographica Section C Structural Chemistry 71, no 8 (17 juillet 2015) : 721–27. http://dx.doi.org/10.1107/s2053229615013273.

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The challenging molecular architecture of spirooxindoles is appealing to chemists because it evokes novel synthetic strategies that address configurational demands and provides platforms for further reaction development. The [3+2] cycloaddition of the carbonyl ylide with arylideneoxindoleviaa five-membered cyclic transition state gave a novel class of dispirooxindole derivatives, namelytert-butyl 4′-(4-bromophenyl)-1′′-methyl-2,2′′-dioxo-5′-phenyl-4′,5′-dihydrodispiro[indoline-3,2′-furan-3′,3′′-indoline]-1-carboxylate, C36H31BrN2O, (Ia), 5′-(4-bromophenyl)-1,1′′-dimethyl-4′-phenyl-4′,5′-dihydrodispiro[indoline-3,2′-furan-3′,3′′-indoline]-2,2′′-dione, C32H25BrN2O3, (Ib), andtert-butyl 1′′-methyl-2,2′′-dioxo-4′-phenyl-5′-(p-tolyl)-4′,5′-dihydrodispiro[indoline-3,2′-furan-3′,3′′-indoline]-1-carboxylate, C37H34N2O5, (Ic). Crystal structure analyses of these dispirooxindoles revealed the formation of two diastereoisomers selectively and confirmed their relative stereochemistry (SSSRandRRRS). In all three structures, intramolecular C—H...O and π–π interactions between oxindole and dihydrofuran rings are the key factors governing the regio- and stereoselectivity, and in the absence of conventional hydrogen bonds, their crystal packings are strengthened by intermolecular C—H...π interactions.
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40

Brodowski, Filip, Mateusz Łężyk, Natalia Gutowska et Piotr Oleskowicz-Popiel. « Effect of external acetate on lactate-based carboxylate platform : Shifted lactate overloading limit and hydrogen co-production ». Science of The Total Environment 802 (janvier 2022) : 149885. http://dx.doi.org/10.1016/j.scitotenv.2021.149885.

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41

Rozmysłowicz, Bartosz, Jher Hau Yeap, Ahmed M. I. Elkhaiary, Masoud Talebi Amiri, Robert L. Shahab, Ydna M. Questell-Santiago, Charilaos Xiros, Benjamin P. Le Monnier, Michael H. Studer et Jeremy S. Luterbacher. « Catalytic valorization of the acetate fraction of biomass to aromatics and its integration into the carboxylate platform ». Green Chemistry 21, no 10 (2019) : 2801–9. http://dx.doi.org/10.1039/c9gc00513g.

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Zhang, Libo, Hai Yu, Yuanyuan Bai, Bijoyananda Mishra, Xiaoxiao Yang, Jing Wang, Evan B. Yu, Riyao Li et Xi Chen. « A Neoglycoprotein-Immobilized Fluorescent Magnetic Bead Suspension Multiplex Array for Galectin-Binding Studies ». Molecules 26, no 20 (14 octobre 2021) : 6194. http://dx.doi.org/10.3390/molecules26206194.

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Carbohydrate-protein conjugates have diverse applications. They have been used clinically as vaccines against bacterial infection and have been developed for high-throughput assays to elucidate the ligand specificities of glycan-binding proteins (GBPs) and antibodies. Here, we report an effective process that combines highly efficient chemoenzymatic synthesis of carbohydrates, production of carbohydrate-bovine serum albumin (glycan-BSA) conjugates using a squarate linker, and convenient immobilization of the resulting neoglycoproteins on carboxylate-coated fluorescent magnetic beads for the development of a suspension multiplex array platform. A glycan-BSA-bead array containing BSA and 50 glycan-BSA conjugates with tuned glycan valency was generated. The binding profiles of six plant lectins with binding preference towards Gal and/or GalNAc, as well as human galectin-3 and galectin-8, were readily obtained. Our results provide useful information to understand the multivalent glycan-binding properties of human galectins. The neoglycoprotein-immobilized fluorescent magnetic bead suspension multiplex array is a robust and flexible platform for rapid analysis of glycan and GBP interactions and will find broad applications.
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Qin, Liang, Li-Xian Lin, Zhi-Ping Fang, Shui-Ping Yang, Gui-Hua Qiu, Jin-Xiang Chen et Wen-Hua Chen. « A water-stable metal–organic framework of a zwitterionic carboxylate with dysprosium : a sensing platform for Ebolavirus RNA sequences ». Chemical Communications 52, no 1 (2016) : 132–35. http://dx.doi.org/10.1039/c5cc06697b.

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A 3D Dy-based metal–organic framework (MOF) 1 was synthesized. Compound 1 can interact with the probe DNA to form a P-DNA@1 system. This system can be used as an effective fluorescent sensing platform for the detection of Ebolavirus RNA.
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44

Singh, Balpreet, Himanshi Sharma, Barinder Kaur, Jaskaran Singh, Gurpreet Singh, Navalpreet Singh et Deepak Kukkar. « Highly Efficient Yttrium Based Metal Organic Framework for Removal of Pollutant Dyes ». Nano Hybrids and Composites 12 (novembre 2016) : 51–56. http://dx.doi.org/10.4028/www.scientific.net/nhc.12.51.

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Highly porous crystalline luminescent metal Organic Frameworks (MOFs) were synthesized by conjugating Yttrium nitrate and Benzene Tri Carboxylate (BTC) in the presence of surfactant Cetyl Tri methyl Ammonium Bromide. A characteristic blue emission peak around 400 nm of Y upon excitation with UV light and peaks through Infra-Red spectroscopy revealed the formation of co-ordinate bond between Y and BTC, thereby confirming the formation of MOF nanoparticles (NPs). The nanoparticles were studied for potential removal of pollutants by encapsulation of the dye methylene blue (MB). Optical analysis affirmed the encapsulation of dye particles within the porous MOF NPs as dye absorption decreased around 600nm. This study offers great promise of using MOF NPs as platform for sensing of analytes in solution and removal of pollutant materials.
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Zhang, Lan, Min Yan, Kun Chen, Qikang Tian, Junying Song, Zijuan Zhang, Zhishen Xie et al. « Novel Carboxylated Chitosan-Based Triptolide Conjugate for the Treatment of Rheumatoid Arthritis ». Pharmaceutics 12, no 3 (26 février 2020) : 202. http://dx.doi.org/10.3390/pharmaceutics12030202.

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A new platform for triptolide (TP) delivery was prepared by conjugating TP to a carboxylmethyl chitosan (CMCS). Compared with the natural TP, the TP-conjugate (TP-CMCS) containing TP of ~5 wt% exhibited excellent aqueous solubility (>5 mg/mL). Results of in vitro experiments showed that TP-CMCS could relieve TP-induced inhibition on RAW264.7 cells and apoptosis, respectively. Compared with the TP group, TP-CMCS could effectively alleviate the toxicity injury of TP and decreased the mortality rate of the mice (p < 0.05). TP-CMCS did not cause much damage to the liver (AST and ALT) and kidney (BUN and CRE) (p < 0.05). After administration, the levels of IL-6, IL-1β, and TNF-α decreased, and the arthritis detumescence percentages increased significantly, and the bony erosion degree was distinctly decreased in the TP-CMCS groups and TP group. Our results suggested that TP-CMCS was a useful carrier for the treatment of RA, which enhanced aqueous solubility of free TP and reduced drug toxicity in vitro and in vivo.
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Gao, Feng, Jin Zou, Wei Zhong, Xiaolong Tu, Xigen Huang, Yongfang Yu, Xiaoqiang Wang, Limin Lu et Ling Bai. « Prussian blue-carboxylated MWCNTs/ZIF-67 composite : a new electrochemical sensing platform for paracetamol detection with high sensitivity ». Nanotechnology 32, no 8 (2 décembre 2020) : 085501. http://dx.doi.org/10.1088/1361-6528/abc91d.

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Li, Hongbo, Jing Li, Qin Xu, Zhanjun Yang et Xiaoya Hu. « A derivative photoelectrochemical sensing platform for 4-nitrophenolate contained organophosphates pesticide based on carboxylated perylene sensitized nano-TiO2 ». Analytica Chimica Acta 766 (mars 2013) : 47–52. http://dx.doi.org/10.1016/j.aca.2012.12.038.

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48

Hollister, Emily B., Andrea K. Forrest, Heather H. Wilkinson, Daniel J. Ebbole, Susannah G. Tringe, Stephanie A. Malfatti, Mark T. Holtzapple et Terry J. Gentry. « Mesophilic and Thermophilic Conditions Select for Unique but Highly Parallel Microbial Communities to Perform Carboxylate Platform Biomass Conversion ». PLoS ONE 7, no 6 (22 juin 2012) : e39689. http://dx.doi.org/10.1371/journal.pone.0039689.

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Richter, Hanno, Sarah E. Loftus et Largus T. Angenent. « Integrating syngas fermentation with the carboxylate platform and yeast fermentation to reduce medium cost and improve biofuel productivity ». Environmental Technology 34, no 13-14 (juillet 2013) : 1983–94. http://dx.doi.org/10.1080/09593330.2013.826255.

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Sakellari, Georgia I., Nicole Hondow et Philip H. E. Gardiner. « Factors Influencing the Surface Functionalization of Citrate Stabilized Gold Nanoparticles with Cysteamine, 3-Mercaptopropionic Acid or l-Selenocystine for Sensor Applications ». Chemosensors 8, no 3 (31 août 2020) : 80. http://dx.doi.org/10.3390/chemosensors8030080.

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Thiols and selenides bind to the surface of gold nanoparticles (AuNPs) and thus provide suitable platforms for the fabrication of sensors. However, the co-existence of adsorbed citrate on the surface of the nanoparticles can influence their functionalization behavior and potentially their sensing performance measured by the extent of particle aggregation. In this study, the functionalization of purchased (7.3 ± 1.2 nm) and in-house prepared AuNPs (13.8 ± 1.2 nm), under the same experimental conditions with either cysteamine (Cys), 3-mercaptopropionic acid (3-MPA), or l-selenocystine (SeCyst) was investigated. 1H-NMR measurements showed distinct citrate signatures on the in-house synthesized citrate-stabilized AuNPs, while no citrate signals were detected on the purchased AuNPs other than evidence of the presence of α-ketoglutaric acid. Carboxylate-containing species attributed to either citrate or α-ketoglutaric acid were identified in all functionalized AuNPs. ATR-FTIR spectroscopy confirmed the functionalization of AuNPs with Cys and 3-MPA, and energy dispersive X-ray (EDX) spectroscopy measurements suggested the formation of SeCyst functionalized AuNPs. Co-adsorption rather than displacement by the functionalizing agents and carboxylate-containing molecules was indicated, which for Cys and SeCyst functionalized AuNPs was also the aggregation limiting factor. In contrast, the behavior of 3-MPA functionalized AuNPs could be attributed to electrostatic repulsions between the functionalized groups.
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