Relevant bibliographies by topics / Non-Molecularly Imprinted Polymer (NIP)

Academic literature on the topic 'Non-Molecularly Imprinted Polymer (NIP)'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Non-Molecularly Imprinted Polymer (NIP)"

1

Azhar, Siti Maizatul Ameera, Brody Sambang Muyang, Gaanty Pragas Maniam, and Nurlin Abu Samah. "Synthesis and Characterization of Molecularly Imprinted Polymer with Oleic Acid as a Template." Key Engineering Materials 932 (September 20, 2022): 71–76. http://dx.doi.org/10.4028/p-9l60lo.

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Molecularly Imprinted Polymer-Oleic Acid (MIPOA) and Molecularly Imprinted Polymer-Palmitic Acid (MIPPA) were synthesized using oleic acid and palmitic acid as the templates; acetonitrile as the porogenic solvent; and allylthiourea as the monomer; and EDGMA as a cross-linker via bulk polymerization. The non-imprinted polymers (NIP) as a control were prepared with the same procedure, but with the absence of template molecule. The synthesized MIPs and NIP were characterized using Fourier Transform Infrared Spectroscopy (FTIR) and the results showed the narrowing of –OH peak which shows that crosslinking has occurred. Field Emission Scanning Electron Microscope-Energy Dispersive X-Ray (FESEM-EDX) was used to analyze the composition of in both MIPs and NIP. The results yielded a composition of C, O, and S. This analysis corresponds to the composition of oleic acid and sulfuric acid as both templates contain -COOH group. These results suggested that the molecularly imprinted polymers can be employed as a potential adsorbent for the removal of oleic acid and palmitic acid from palm fatty acid distillate (PFAD) waste.
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Wolska, Joanna, and Nasim Jalilnejad Falizi. "Membrane Emulsification Process as a Method for Obtaining Molecularly Imprinted Polymers." Polymers 13, no. 16 (August 23, 2021): 2830. http://dx.doi.org/10.3390/polym13162830.

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The membrane emulsification process (ME) using a metallic membrane was the first stage for preparing a spherical and monodisperse thermoresponsive molecularly imprinted polymer (TSMIP). In the second step of the preparation, after the ME process, the emulsion of monomers was then polymerized. Additionally, the synthesized TSMIP was fabricated using as a functional monomer N-isopropylacrylamide, which is thermosensitive. This special type of polymer was obtained for the recognition and determination of trace bisphenol A (BPA) in aqueous media. Two types of molecularly imprinted polymers (MIPs) were synthesized using amounts of BPA of 5 wt.% (MIP-2) and 7 wt.% (MIP-1) in the reaction mixtures. Additionally, a non-imprinted polymer (NIP) was also synthesized. Polymer MIP-2 showed thermocontrolled recognition for imprinted molecules and a higher binding capacity than its corresponding non-imprinted polymer and higher than other molecularly imprinted polymer (MIP-1). The best condition for the sorption process was at a temperature of 35 °C, that is, at a temperature close to the phase transition value for poly(N-isopropylacrylamide). Under these conditions, the highest levels of BPA removal from water were achieved and the highest adsorption capacity of MIP-2 was about 0.5 mmol g−1 (about 114.1 mg g−1) and was approximately 20% higher than for MIP-1 and NIP. It was also observed that during the kinetic studies, under these temperature conditions, MIP-2 sorbed BPA faster and with greater efficiency than its non-imprinted analogue.
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Turner, Nicholas W., Clovia I. Holdsworth, Adam McCluskey, and Michael C. Bowyer. "N-2-Propenyl-(5-dimethylamino)-1-naphthalene Sulfonamide, a Novel Fluorescent Monomer for the Molecularly Imprinted Polymer-Based Detection of 2,4-Dinitrotoluene in the Gas Phase." Australian Journal of Chemistry 65, no. 10 (2012): 1405. http://dx.doi.org/10.1071/ch12155.

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Fluorescent molecularly imprinted polymers (MIP) specific for 2,4-dinitrotoluene (DNT) have been synthesised using a novel monomer N-2-propenyl-(5-dimethylamino)-1-naphthalene sulfonamide. Three formats of the polymer were produced: a traditional bulk monolith ground into particles, a flexible, but highly cross-linked plasticiser-modified free standing membrane, and a hybrid material consisting of particles embedded in a poly(acrylonitrile) phase inversed film. Within all materials, a clearly defined imprinting effect was observed upon exposure to DNT vapour at room temperature. In all cases, preferential rebinding of DNT to the molecularly imprinted materials (3–5 times) over their non-imprinted (NIP) equivalents was evident within <10 min of contact with the DNT vapour stream. Fluorographic images of the fluorescent polymers showed the DNT binding-induced quenching to be significantly higher in the MIP material than in the non-imprinted control polymer.
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Murray, Audrey, Banu Örmeci, and Edward P. C. Lai. "Removal of endocrine disrupting compounds from wastewater using polymer particles." Water Science and Technology 73, no. 1 (September 16, 2015): 176–81. http://dx.doi.org/10.2166/wst.2015.481.

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This study evaluated the use of particles of molecularly imprinted and non-imprinted polymers (MIP and NIP) as a wastewater treatment method for endocrine disrupting compounds (EDCs). MIP and NIP remove EDCs through adsorption and therefore do not result in the formation of partially degraded products. The results show that both MIP and NIP particles are effective for removal of EDCs, and NIP have the advantage of not being as compound-specific as the MIP and hence can remove a diverse range of compounds including 17-β-estradiol (E2), atrazine, bisphenol A, and diethylstilbestrol. Removal of E2 from wastewater was also tested to determine the effectiveness of NIP in the presence of interfering substances and natural organic matter. Removal of E2 from wastewater samples was high and increased with increasing NIP. NIP represent an effective way of removing a wide variety of EDCs from wastewater.
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5

Zhang, Hai Hui, Fei Fei Xu, Yu Qing Duan, Can Zhang, Yong Sheng Yan, Gui Bo Sun, and Xiao Bo Sun. "Selective Adsorption and Pre-Concentration of Morin by Molecularly Imprinted Polymers with Chitosan Beads as Functional Matrix." Advanced Materials Research 781-784 (September 2013): 756–59. http://dx.doi.org/10.4028/www.scientific.net/amr.781-784.756.

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To separate and enrich morin, a molecularly imprinted polymer (MIP) was synthesized on chitosan by surface molecular imprinting technique and characterized with Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). The results showed that MIP possessed better selectivity and recognition for morin in a mixture than that of non-imprinted polymer (NIP). The saturated adsorption amount of MIP was 8.0 mg/g, which was 4-fold than that of NIP, and the recovery in the elution step was 94.87% and 10.97% for MIP and NIP, respectively. These findings indicate MIP could realize the separation and pre-concentration of morin in real sample and may be used for solid phase extraction (MIP-SPE) protocol.
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Aprilia, Suci. "PENGARUH MILLING TERHADAP KARAKTERISTIK MOLECULARLY IMPRINTED POLYMER KARBARIL (C12H11NO2)." JOURNAL ONLINE OF PHYSICS 5, no. 2 (July 25, 2020): 1–5. http://dx.doi.org/10.22437/jop.v5i2.9430.

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Molecularly Imprinted Polymer (MIP) has been synthesized with carbaryl used as a template and forms complex bonds with Methacrylic Acid (MAA)through hydrogen bonds, followed by a cross-linking process using Ethylene Glycol Dimethacrylate (EGDMA) cross-linkers. The polymerization process begins with the thermal decomposition of Benzoyl Peroxide (BPO) as an initiator. Non-Imprinted Polymer (NIP) as a control polymer has also been synthesized using a similar procedure without using carbaryl templates. In this study, two variations of carbaryl are used, which are not milled carbamates, and carbaryl has been milled using High Energy Milling (HEM). The FTIR study was carried out to investigate the presence of carbaryl in polymers, MIP, and NIP. The spectrum shows that the concentration of carbaryl compound decreases after the extraction process. This result was also confirmed by the increase in the value of the percentage of transmittance in the MIP, especially the nano carbaryl MIP. This result is supported by the X-RD results, which showed a decrease in the size of the crystals in the carbaryl MIP from 10.07 Å while the nano carbaryl MIP was 9.16 Å.
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Gallegos-Tabanico, Amed, Jorge Jimenez-Canale, Sergio G. Hernandez-Leon, Alexel J. Burgara-Estrella, Jose Carmelo Encinas-Encinas, and Jose A. Sarabia-Sainz. "Development of an Electrochemical Sensor Conjugated with Molecularly Imprinted Polymers for the Detection of Enrofloxacin." Chemosensors 10, no. 11 (October 28, 2022): 448. http://dx.doi.org/10.3390/chemosensors10110448.

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An electrochemical sensor was fabricated for the rapid and simple detection of enrofloxacin (EF). Modification of screen-printed gold electrodes (SPE) with molecularly imprinted polymers (MIPs) allowed the detection of enrofloxacin by square wave voltammetry (SWV), measuring the oxidation peak at +0.9 V. The detection principle of molecularly imprinted polymers (MIPs) is based on the formation of binding sites with affinities and specificities comparable with those of natural antibodies. The detection of enrofloxacin showed a linear range of 0.01–0.1 mM with a detection limit LOD of 0.02 mM. The development of a non-imprinted polymer (NIP) control sensor allowed for better and more efficient detection. In addition, the sensor is portable, having the advantage of analyzing and detecting molecules of interest without the need to take the sample to a laboratory.
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Atqa, Ainun Rachmatina, and Maria Monica Sianita. "PENGARUH KONSENTRASI KLORAMFENIKOL TERHADAP ADSORPSI POLIMER CETAK MOLEKUL DENGAN METODE PRESIPITASI." Unesa Journal of Chemistry 10, no. 3 (November 13, 2021): 257–67. http://dx.doi.org/10.26740/ujc.v10n3.p257-267.

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Penelitian ini bertujuan untuk mensisntesis Molecularly Imprinted Polymer (MIP) yang dapat digunakan sebagai adsorben pada adsorpsi kloramfenikol (CAP). Kinerja adsorben MIP diuji adsorpsinya dengan variasi konsentrasi CAP awal. Konsentrasi CAP yang digunakan yaitu 10, 25, dan 50 ppm. Karakterisasi Polimer MIP, Non-Imprinted Polimer (NIP), dan Polimer Blanko (PB) yang dihasilkan dianalisis menggunakan Fourier Transform Infrared (FTIR), untuk mengetahui gugus -NO2. Hasil penelitian menunjukkan semakin besar konsentrasi CAP awal maka kemampuan adsorpsi semakin meningkat pada MIP dan PB. Kemampuan adsorpsi terbesar pada penelitian ini untuk MIP yaitu 16,54 mg/g dan PB yaitu 8,78 mg/g pada konsentrasi 50 ppm. MIP memiliki kemampuan adsorpsi lebih tinggi daripada PB karena adsorpsi MIP yang spesifik terhadap CAP. Nilai imprinting factor (IF) yang didapatkan sebesar 1,88. Hasil FTIR menunjukkan adanya gugus –NO2 pada bilangan gelombang 1560,62 cm-1 pada MIP dengan intensitas yang lebih rendah daripada NIP. Hal tersebut menunjukkan adanya CAP yang telah terelusi pada proses ekstraksi. Kata kunci : Molecularly Imprinted Polymer, kloramfenikol, adsorpsi
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9

Gora Fahman and Maria Monica Sianita. "Calculation of enrichment factor in chloramphenicol analysis in shrimp with variation of concentration using molecularly imprinted polymer." World Journal of Advanced Research and Reviews 15, no. 2 (August 30, 2022): 362–68. http://dx.doi.org/10.30574/wjarr.2022.15.2.0767.

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This research aims to determine the effect of chloramphenicol concentration in shrimp toward the value of enrichment factor (EF) in the adsorption-desorption process using Molecularly Imprinted Polymer (MIP) as adsorbent. The enrichment factor describes how much analyte concentration is transferred from the sample to the solvent. In this research, the highest enrichment factor (EF) value was obtuined for chloramphenicol concentration of 50 ppm which was 120,086%. The Scanning Electron Microscope (SEM) analysis showed that the sizes of Blank Polymer (PB), Non-Imprinted Polymer (NIP), and Molecularly Imprinted Polymer (MIP) were 12, 18, and 23 nm, respectively. The detection limit value (LOD) was 0.0981 μg/mL, and the quantitation limit value (LOQ) was 0.3273 μg/mL. At this limit of detection (LOD) no chloramphenicol was detected in the analyzed shrimp.
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10

Roland, Rachel Marcella, and Showkat Ahmad Bhawani. "Synthesis of Molecularly Imprinted Polymer for the Removal of Melamine." Asian Journal of Chemistry 31, no. 12 (November 16, 2019): 2770–76. http://dx.doi.org/10.14233/ajchem.2019.22243.

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In this article, molecularly imprinted polymer (MIP) of melamine was synthesized by non-covalent approach using microemulsion medium. In this study, melamine is used as a template molecule, acrylic acid as a functional monomer, N,N′-methylenebis(acrylamide) (MBAm) as a cross-linker and 2,2′-azobisisobutyronitrile (AIBN) as an initiator and microemulsion as a solvent. The produced polymers were characterized by Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET) and thermogravimetric analysis (TGA). The batch binding analysis was conducted for the evaluation of MIP and NIP rebinding efficiency with the melamine template. The adsorption studies including the adsorbent dosage of polymer, initial concentrations and pH of melamine solution were successfully carried out on both MIP and NIP. For selectivity test, 2,4,6-trichlorophenol was chosen as the competitive molecule against melamine template. A very good relative selectivity coefficient was achieved. The removal of melamine from different samples were conducted successfully by achieving a good removal efficiency in milk, river water and human blood serum 84.30, 94.26 and 93.32 %, respectively.
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Dissertations / Theses on the topic "Non-Molecularly Imprinted Polymer (NIP)"

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Lin, Kun-Sian, and 林坤賢. "Non-covalent solid phase cyclic-peptide synthesis using molecularly imprinted polymer." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/40010172874668900006.

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碩士
國立東華大學
化學系
99
Cyclic peptides have been shown broad biological activities. However, to obtain the cyclic tetrapeptide using chemical process is limited. Previously, we use molecularly imprinted polymer film (MIPF) as a non-covalent auxiliary to access the cyclization. The fiber fabricated MIPF has been successful for cyclic tetrapeptide synthesis. This thesis is focused on using the flat surface of transparency film to induce MIPF with large surface area. The new materials were prepared by copolymerization with several functional monomers and cross linker in the presence of linear tetrapeptide. The heat induced polymerization generated the cavities with turn conformation. Thus, cyclic peptide synthesis this can be conducted more conveniently and effectively. The yield of cyclo (P-L-G-G) and cyclo (G-G-G-G) is 27.3 % and 12 %, respectively. This method constructed large surface area MIPF with 10-4 M Kd value. There is no need to use matrix. The stability of MIPF is increased and it is reusable to more than 5 times.
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Al, Abdullatif Sarah. "Optimization of Molecularly Imprinted Polymers for Electrochemical Sensing of Non-charged Biological Molecules." Thesis, 2019. http://hdl.handle.net/10754/660134.

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Biosensors monitor physiological activities for diagnosis and treatment of disease. Molecularly imprinted polymers (MIPs) are a viable synthetic approach for molecular recognition in biosensing. For biosensing purposes, the most important properties in MIP optimization are sensitivity and selectivity towards a desired analyte. This study aims to optimize MIP sensitivity and selectivity by varying the amount and type of cross-linker used in the synthesis of cortisol and melatonin. The four cross-linkers tested were trimethylpropane trimethacrylate (TRIM), ethyleneglycodimethacrylate (EGDMA), divinylbenzene (DVB), and pentaerythritol triacrylate (PETRA). Based on literature, the following ratios were used for the template molecule to functional monomer to cross-linker in MIP synthesis: for EGDMA cross-linked polymers, 1:6:30; for TRIM and PETRA cross-linked polymers, 1:8:8, 1:6:3, and 1:8:35; for DVB cross-linked polymers, 1:6:30, 1:4:16, and 4:1:60. The polymers were ground and washed, then suspended in a polyvinyl matrix which was spin-coated onto an organic electrochemical transducer (OECT). The device performance was evaluated using electrochemical impedance spectroscopy. For each device, the impedance was measured in electrolyte solutions containing target molecules in concentrations ranging from 1 pM to 100 uM. The impedance was plotted against the analyte concentration to give the sensing slope, which is a measurement for the binding affinity of the polymer. For a device to be considered sensitive, its sensing slope should be greater than its non-imprinted counterpart by a factor above the error margin (+/- 1.79). Of the devices tested, CM1835T (highly cross-linked with TRIM) showed sensitivity towards cortisol, but lacks selectivity towards cortisol over its structural analog, estradiol. Of the melatonin selective polymers, MM163T (low cross-linking with TRIM), MM1630D, and MM4160D (both highly cross-linked with DVB) all showed promising results in sensitivity to melatonin. Overall, the results indicate that high degrees of cross-linking in MIPs improve sensitivity for large, rigid, non-aromatic molecules such as cortisol; however there is no correlation between selectivity and the degree of cross-linking. Meanwhile, divinylbenzene as a cross-linker improves sensitivity and selectivity towards aromatic analytes such as melatonin and estradiol. This study could be improved upon by further characterization of imprinted and non-imprinted polymers, investigation of molecular dynamics, and optimization of devices.
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