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Journal articles on the topic 'Biuret complex of succinimide'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Stefanescu, Raluca, Stefania Brebu, Mihaela Matei, Ioan Marian Risca, Andriana Surleva, and Gabi Drochioiu. "Contribution to Casein Determination by UV Spectrophotometry." Acta Chemica Iasi 25, no. 2 (2017): 112–26. http://dx.doi.org/10.1515/achi-2017-0011.

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Abstract In the present paper, the interaction between copper ions and proteins is presented, in order to elaborate a simple and rapid spectrophotometric assay of casein in milk. Under alkaline conditions, copper ions form the biuret complex with the proteins, which can be used in protein determination. Although very specific, the biuret method is less sensitive. Using insoluble copper phosphate, casein is able to extract copper ions, with which it forms the biuret complex, while either the complex or copper ions could be determined in the ultraviolet range. Indeed, an increased absorbance of

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2

Shi, Yong Gang, Zi Cun Li, Lin Mei, and Ping Sun. "The Stannous Complex of Succinimide as Multifuctional Additive for Lubricating Oils." Advanced Materials Research 535-537 (June 2012): 2479–82. http://dx.doi.org/10.4028/www.scientific.net/amr.535-537.2479.

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The excellent performance of dispersion makes poly-isobutene succinimide widely used in engine's lubricating oils. But this additive has no anti-oxidation ability, anti-friction and anti-wear behaviors. In engine’s oil, it must be used with antioxidants, extreme-pressure additives and detergents. Here the authors suggested that by metallizing the succnimide, many useful lubricating chemical properties would be affiliated to this additive. The nitrogen radicals of succinimide can combine with metal ions, such as transition metal ions, forming coordination compounds. In this article, the stannou

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3

Xue, Na, Yutao Jia, Congwei Li, Binnan He, Caiqin Yang та Jing Wang. "Characterizations and Assays of α-Glucosidase Inhibition Activity on Gallic Acid Cocrystals: Can the Cocrystals be Defined as a New Chemical Entity During Binding with the α-Glucosidase?" Molecules 25, № 5 (2020): 1163. http://dx.doi.org/10.3390/molecules25051163.

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Cocrystallization with co-former (CCF) has proved to be a powerful approach to improve the solubility and even bioavailability of poorly water-soluble active pharmaceutical ingredients (APIs). However, it is still uncertain whether a cocrystal would exert the pharmacological activity in the form of a new chemical entity, an API-CCF supramolecule. In the present study, gallic acid (GA)-glutaric acid and GA-succinimide cocrystals were screened. The solubility, dissolution rate and oral bioavailability of the two cocrystals were evaluated. As expected, AUCs of GA-glutaric acid and GA-succinimide

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4

DOSHCHONOK, A., K. MAYOROVA, and I. BURAYA. "INFLUENCE OF THE STRUCTURE OF HIGHER AMINES ON THE PROPERTIES OF SUCCINIMIDE TYPE ADDITIVES." Herald of Polotsk State University. Series B. Industry. Applied Sciences 47, no. 1 (2023): 82–87. http://dx.doi.org/10.52928/2070-1616-2023-47-1-82-87.

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The article presents the results of a complex of studies on the effect of the structure of higher amines and their compositions used in industrial synthesis on the properties of succinimide additives. The properties and yield of synthesis reaction products at each stage of the process are analyzed depending on the molar mass and the position of amino groups in the structure of the starting amines. A comparative analysis of the dispersing properties of the resulting succinimide additives is carried out.

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5

Das, Debasree, Santanu Pattanayak, Kundan K. Singh, Bikash Garai, and Sayam Sen Gupta. "Electrocatalytic water oxidation by a molecular cobalt complex through a high valent cobalt oxo intermediate." Chemical Communications 52, no. 79 (2016): 11787–90. http://dx.doi.org/10.1039/c6cc05773j.

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6

Sharma, C. L., and V. Mishra. "Antiferromagnetic super exchange and spectral studies on dimeric 8-quinolinolato complexes of copper(II) imides." Canadian Journal of Chemistry 63, no. 11 (1985): 3027–30. http://dx.doi.org/10.1139/v85-502.

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The complexes of the type [Cu(Q)(P)]2 and [Cu(Q)(S)]2 where HQ = 8-hydroxyquinoline and P and S are deprotonated phthalimide and succinimide, respectively, were prepared and characterized on the basis of molecular mass determination, elemental analysis. X-ray diffraction, ir, electronic spectra, conductance, thermal analysis, and magnetic measurements. They were of tetrahedrally distorted square planar structure. The susceptibility data at different temperatures were fitted to the Bleaney–Bowers equation which indicated medium antiferromagnetic super exchange interaction within one dimeric uni

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7

Kumari, Sushma, Chakadola Panda, Shyamalava Mazumdar, and Sayam Sen Gupta. "A molecular Fe-complex as a catalyst probe for in-gel visual detection of proteins via signal amplification." Chemical Communications 51, no. 83 (2015): 15257–60. http://dx.doi.org/10.1039/c5cc04399a.

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We report the use of a molecular peroxidase mimic biuret FeTAML for chemoselective labeling of proteins and the subsequent visual detection (<0.1 pmoles) of the conjugate in a polyacrylamide gel by catalytic signal amplification.

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8

Watanabe, N., S. Kamei, A. Ohkubo, et al. "Urinary protein as measured with a pyrogallol red-molybdate complex, manually and in a Hitachi 726 automated analyzer." Clinical Chemistry 32, no. 8 (1986): 1551–54. http://dx.doi.org/10.1093/clinchem/32.8.1551.

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Abstract In this new method for determining urinary protein, the reaction is complete within 10 min at 37 degrees C. This method is applicable to automated as well as manual measurements. Protein concentration and absorbance at 600 nm are linearly related throughout a wide range of concentrations, 10 to 16 000 mg/L. However, the chromogenicity of the gamma-globulins in this method is 70% of that of albumin, as estimated from results by a biuret method. Within-run CVs were less than 3.3%; the day-to-day CV was 2.9%. Errors due to interfering components in urine are less than 2%. The normal rang

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9

Corominas, Luis F., Roberto A. Navarro, Pedro Rojas, and José L. Cruz. "Determination of Biuret in Urea and Mixed Fertilizers by Cupric Ion Selective Electrode." Journal of AOAC INTERNATIONAL 69, no. 1 (1986): 119–22. http://dx.doi.org/10.1093/jaoac/69.1.119.

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Abstract A method for determining biuret in urea and mixed fertilizers by using a cupric ion selective electrode (CISE) has been developed to take advantage of the simplicity of the apparatus. The method is based on the same principle as the atomic absorption spectrophotometric (AAS) method, 2.091-2.093: formation of a biuret-copper complex, elimination of excess copper, and determination of complexed copper. However, some changes were needed to eliminate starch and alcohol interferences. The method was tested for ruggedness and then compared with the AAS method for 4 fertilizer samples. Avera

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10

Masaki, Seishi, Hiroyuki Inoue, and Hideo Honma. "Dissolution behavior of silver anode in succinimide-silver complex bath." Metal Finishing 96, no. 5 (1998): 52–54. http://dx.doi.org/10.1016/s0026-0576(98)80104-9.

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11

B, Kulkarni Manasi, and Joshi Anagha M. "AN EXPERIMENTAL DESIGN APPROACH FOR OPTIMIZATION OF MODIFIED COLORIMETRIC FIRST-ORDER DERIVATIVE METHOD FOR ESTIMATION OF SERRALYSIN IN BULK AND PHARMACEUTICAL FORMULATION." Asian Journal of Pharmaceutical and Clinical Research 11, no. 9 (2018): 293. http://dx.doi.org/10.22159/ajpcr.2018.v11i9.26999.

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Objective: The aim of the present work is to use experimental design to screen and optimize experimental variables for developing a colorimetric first-order derivative method for determining content of serralysin (SER) using biuret and Folin–Ciocalteu phenol reagent for stable color development. The method is based on the reaction of peptide bond in the protein with Biuret reagent in alkaline medium and further reaction of remaining tryptophan and tyrosine residues with Folin–Ciocalteu Phenol reagent to form a stable blue-colored complex (first-order derivative λmax 620 nm).Materials and Metho

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12

Mihalcea, Elena, Andra Cristina Enache, Vasile-Robert Gradinaru, and Gabi Drochioiu. "SIMULTANEOUS DETERMINATION OF PROTEIN AND ESSENTIAL AMINO ACIDS IN BIOLOGICAL SAMPLES." ACTA CHEMICA IASI 32, no. 1 (2024): 1–12. http://dx.doi.org/10.47743/achi-2024-1-0001.

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The utilization of spectrophotometric methods for the determination and analysis of proteins is of great interest as they are generally simple, rapid and with high sensitivity. These protein assays have many uses in the food, plant breeding, pharmaceutical and biomedical industries, as well as in forensic science and a variety of other research fields. Among these, the biuret method is highly sensitive and is widely used in clinical and biological laboratories. However, the use of copper sulphate in the traditional biuret method of protein identification can lead to substantial interference fr

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13

Chen, Jian-Ge, Michael Logman, and Stephen G. Weber. "Effect of Peptide Primary Sequence on Biuret Complex Formation and Properties." Electroanalysis 11, no. 5 (1999): 331–36. http://dx.doi.org/10.1002/(sici)1521-4109(199905)11:5<331::aid-elan331>3.0.co;2-#.

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14

Kornilov, A. D., M. S. Grigoriev, and E. V. Savinkina. "Comparison of the rare earth complexes iodides and polyiodides with biuret." Fine Chemical Technologies 17, no. 2 (2022): 172–81. http://dx.doi.org/10.32362/2410-6593-2022-17-2-172-181.

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Objectives. Currently, several hundred polyiodide compounds have been synthesized and structurally characterized, but so far, no formation patterns for certain polyiodide ions have been revealed. The purpose of this work is to continue the search for formation regularities of polyiodides, including polyiodides of lanthanide complexes.Methods. Iodide and polyiodide of samarium complexes with biuret (BU), [Sm(BU)4]I3·BU·2H2O and [Sm(BU)4][I5][I]2, were first synthesized and characterized by X-ray diffraction analysis and infrared spectroscopy, respectively.Results. The obtained compounds complem

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15

Yang, Bing, Haifan Wu, Paul D. Schnier, et al. "Proximity-enhanced SuFEx chemical cross-linker for specific and multitargeting cross-linking mass spectrometry." Proceedings of the National Academy of Sciences 115, no. 44 (2018): 11162–67. http://dx.doi.org/10.1073/pnas.1813574115.

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Chemical cross-linking mass spectrometry (CXMS) is being increasingly used to study protein assemblies and complex protein interaction networks. Existing CXMS chemical cross-linkers target only Lys, Cys, Glu, and Asp residues, limiting the information measurable. Here we report a “plant-and-cast” cross-linking strategy that employs a heterobifunctional cross-linker that contains a highly reactive succinimide ester as well as a less reactive sulfonyl fluoride. The succinimide ester reacts rapidly with surface Lys residues “planting” the reagent at fixed locations on protein. The pendant aryl su

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16

Bhavya Sri, K., B. Hema, B. Anila, and Mogili Sumakanth. "A SIMPLE SPECTROPHOTOMETRIC METHOD FOR QUANTIFICATION OF CASEIN IN MILK AND MILK PRODUCTS." International Journal of Advanced Research 11, no. 01 (2023): 1741–45. http://dx.doi.org/10.21474/ijar01/16200.

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In the food industry, production processes and food products are subjected to the highest possible quality control requirements. In order to safeguard the quality of a certain product along the production chain, it is important to know its composition. This, for instance, especially applies to a natural product like milk and its further processing in order to efficiently control the production of cheese and quark. Milk contains an important natural protein that is responsible for the essential curdling process during the production of cheese: casein. Casein protein provides the body with all t

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17

Panda, Chakadola, Munmun Ghosh, Tamas Panda, Rahul Banerjee, and Sayam Sen Gupta. "Fe(iii) complex of biuret-amide based macrocyclic ligand as peroxidase enzyme mimic." Chemical Communications 47, no. 28 (2011): 8016. http://dx.doi.org/10.1039/c1cc12686e.

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18

Dobre, Adela F., Augustin M. Madalan, and Petre Ionita. "The Crystal Structures of Some Bromo-Derivatives of the DPPH Stable Free Radical." Molbank 2024, no. 3 (2024): M1880. http://dx.doi.org/10.3390/m1880.

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Bromination of the 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical with bromine or N-bromo-succinimide (NBS) affords a complex mixture of bromo- and nitro-derivatives of the starting material. In this study, by chromatographic separation, most of the reaction products were isolated. Suitable crystals for X-ray measurements were obtained and characterized for the compounds 2-p-bromophenyl-2-phenyl-1-picrylhydrazyl free radical (Br-DPPH), 2-p-bromophenyl-2-phenyl-1-picrylhydrazine (Br-DPPH-H), and 2,2-(p-bromophenyl)-1-(2-bromo-4,6-dinitrophenyl)hydrazine (Br2-DPPBr-H).

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19

Stern, Theodor. "Chemical Structure and Side Reactions in Polyurea Synthesized via the Water–Diisocyanate Synthesis Pathway." Polymers 15, no. 17 (2023): 3524. http://dx.doi.org/10.3390/polym15173524.

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Industrial polyureas are typically synthesized using diisocyanates via two possible alternative pathways: the extremely quick and highly exothermal diamine–diisocyanate pathway and the relatively slow and mild water–diisocyanate pathway. Although polyurea synthesis via the water–diisocyanate pathway is known and has been industrially applied for many decades, there is surprisingly very little analytical information in the literature in relation to the type and extent of the occurring side reactions and the resulting chemical structures following this synthesis pathway. The synthesis of polyure

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20

Borowiak, Teresa, Maciej Kubicki, Waleria Wysocka, and Anna Przybył. "Regio-selective bromination of multiflorine and structures of 3-bromomultiflorine and its molecular complex with succinimide." Journal of Molecular Structure 442, no. 1-3 (1998): 103–13. http://dx.doi.org/10.1016/s0022-2860(97)00332-3.

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21

Fu, Ruimin, Hong Zhang, Wei Tang, Xue Yang, Ding Wang, and Wuling Chen. "Study on the effect of fengycin on the respiration and metabolic mechanism of Penicillium expansum." Materials Express 11, no. 12 (2021): 2047–51. http://dx.doi.org/10.1166/mex.2021.2114.

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This study investigate the inhibiting effect of fengycin on respiration and nutrient utilization of Penicillium expansum. The respiratory inhibition rate of the P. expansum was determined by the test of dissolved oxygen fengycin, The effect of fengycin treatment on the activity of P. expansum mitochondrial complex enzyme was detected by mitochondrial enzyme activity assay. The ability of fengycin treatment to P. expansum the utilization of total sugar and total protein was determined by DNS colorimetric method and biuret method. After fengycin treatments, the TCA pathway of respiratory metabol

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22

NAWAFUNE, Hidemi, Keiko SHIROGUCHI, Shozo MIZUMOTO, Yasuhito KOHASHI, and Keigo OBATA. "Direct Electroless Silver Plating on Copper Metal from Succinimide Complex Bath Using Imidazole as the Reducing Agent." Journal of the Surface Finishing Society of Japan 52, no. 10 (2001): 702–7. http://dx.doi.org/10.4139/sfj.52.702.

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23

NAWAFUNE, Hidemi, Keiko SHIROGUCHI, Shozo MIZUMOTO, Yasuhito KOHASHI, and Keigo OBATA. "Neutral Electroless Silver Plating Using Imidazole and Succinimide as Reducing and Complex Agents on Nickel-Phosphorus Substrate." Journal of the Surface Finishing Society of Japan 52, no. 11 (2001): 768–72. http://dx.doi.org/10.4139/sfj.52.768.

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24

Shilov, Georgii N., Oleg N. Bubel, and Petr D. Shabanov. "A new approach to understanding structure, functions and classificasion of GABA-benzodiazepine receptor complex, a molecular target for creation of new anticonvulsants on the base of inhibitory amino acids." Reviews on Clinical Pharmacology and Drug Therapy 14, no. 3 (2016): 34–45. http://dx.doi.org/10.17816/rcf14334-45.

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The GABA molecule was shown to the methods of quantum mechanic characteristics and molecular geometry has three conformational states: linear (GABA-1 conformer), cyclic (GABA-2 comformer) and bucket-like (GABA-3 conformer). The play different functions in the brain neurons: cyclic and bucket-like conformers play role of endogenous transmitters, and linear conformer participates in neuronal metabolism. The theoretical conformational analysis shows there are two types of GABA receptors in the CNS neurons: GABA-2 receptors, agonists of which are cyclic conformer of GABA, glycine and β-alanine and

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25

Sapan, Christine V., Roger L. Lundblad, and Nicholas C. Price. "Colorimetric protein assay techniques." Biotechnology and Applied Biochemistry 29, no. 2 (1999): 99–108. http://dx.doi.org/10.1111/j.1470-8744.1999.tb00538.x.

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There has been an increase in the number of colorimetric assay techniques for the determination of protein concentration over the past 20 years. This has resulted in a perceived increase in sensitivity and accuracy with the advent of new techniques. The present review considers these advances with emphasis on the potential use of such technologies in the assay of biopharmaceuticals. The techniques reviewed include Coomassie Blue G‐250 dye binding (the Bradford assay), the Lowry assay, the bicinchoninic acid assay and the biuret assay. It is shown that each assay has advantages and disadvantage

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26

Bano, Kulsum, Jyoti Sharma, Archana Jain, Hayato Tsurugi, and Tarun K. Panda. "A binuclear aluminium complex as a single competent catalyst for efficient synthesis of urea, biuret, isourea, isothiourea, phosphorylguanidine, and quinazolinones." RSC Advances 13, no. 5 (2023): 3020–32. http://dx.doi.org/10.1039/d2ra07714k.

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A highly efficient chemoselective insertion of secondary amines, alcohols, thiols, and phosphine oxide as well as guanylation/cyclisation of acid aminoesters with heterocumulenes using a binuclear Al complex as a single competent catalyst is reported.

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27

Jiménez, G. Lesly, María J. Rosales-Hoz, Marco A. Leyva, J. L. Reyes-Rodríguez, Ulises Galindo-García, and C. Falcony. "Structural analysis of an Europium-Sodium complex containing 2-thenoyltrifluoroacetone and succinimide as ligands, a highly photoluminescent material." Journal of Molecular Structure 1228 (March 2021): 129778. http://dx.doi.org/10.1016/j.molstruc.2020.129778.

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28

Biswas, Niladri, Ankur Chaudhuri, Sibani Chakraborty, and Chirantan Roy Choudhury. "Example of square planar copper(II) biuret complex: crystal structure, DNA and protein binding activity and molecular docking study." Inorganic and Nano-Metal Chemistry 48, no. 10 (2018): 495–507. http://dx.doi.org/10.1080/24701556.2019.1572623.

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29

Mincheva, Nelly, Dimitar Mehanjiev, and Mariana Mitewa. "Mixed Palladium(iii)–Nickel(ii) and Palladium(ii)–Copper(ii) Complex Salts with Biuret and the N4-Macrocycle Cyclam." Journal of Chemical Research, no. 8 (1998): 434–35. http://dx.doi.org/10.1039/a800669e.

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30

Gawron, Andrew J., and Susan M. Lunte. "Optimization of the conditions for biuret complex formation for the determination of peptides by capillary electrophoresis with ultraviolet detection." Electrophoresis 21, no. 10 (2000): 2067–73. http://dx.doi.org/10.1002/1522-2683(20000601)21:10<2067::aid-elps2067>3.0.co;2-5.

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31

Porcello, Darrell M., Stephen D. Smith, and John R. Huguenard. "Actions of U-92032, a T-Type Ca2+ Channel Antagonist, Support a Functional Linkage Between I T and Slow Intrathalamic Rhythms." Journal of Neurophysiology 89, no. 1 (2003): 177–85. http://dx.doi.org/10.1152/jn.00667.2002.

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Thalamic relay neurons express high levels of T-type Ca2+ channels, which support the generation of robust burst discharges. This intrinsically mediated form of phasic spike firing is thought to be critical in the generation of slow (3–4 Hz) synchronous oscillatory activity of absence epilepsy. Recordings made from brain slices or whole animals have shown that slow synchronous absence-like activity can be abolished when Ca2+-dependent burst firing in relay neurons is interrupted by the pharmacological or genetic inactivation of T-channels. Because succinimide drugs act as incomplete and nonspe

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32

Adetoro, A., S. O. Idris, A. D. Onu, and F. G. Okibe. "Kinetics and mechanistics steps to the electron transfer reaction of peroxo-bridged binuclear cobalt(III) complex of succinimide by glycine in aqueous acidic medium." Bulletin of the Chemical Society of Ethiopia 35, no. 2 (2021): 425–34. http://dx.doi.org/10.4314/bcse.v35i2.15.

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ABSTRACT. The kinetics and mechanistic steps to the electron transfer reaction of the peroxo-bridged binuclear cobalt(III) complex of succinimide [(suc)(en)2Co(O2)Co(en)2(suc)2+] hereafter called peroxo-bridged dicobalt(III) complex ‘[Co(O2)Co2+]’ by glycine have been carried out spectrophotometrically at λ = 420 nm and T = 26 ± 1 oC, [H+] = 1 x 10-3 M and ᶙ = 0.5 M (NaCl) in aqueous acidic medium. The reaction was found to be first order with respect to [Co(O2)Co2+] and [(Gly] and experimental data indicates a second-order overall. The reactions obeyed the general rate law: (d[Co(O2)Co2+]/dt)

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Dodonov, Vladimir A., Olga A. Kushnerova, Evgeny V. Baranov, and Igor L. Fedushkin. "Reduction and Cycloaddition of Heteroalkenes at Ga(I) Bisamide Center." Reactions 5, no. 1 (2024): 213–30. http://dx.doi.org/10.3390/reactions5010009.

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The reactivity of the complex [(dpp-bian)GaNa(DME)2] (1) (dpp-bian = 1,2-bis[(2,6-di-isopropylphenyl)imino]acenaphthene) towards isocyanates, benzophenone, diphenylketene, and 1,2-dibenzylidenehydrazine has been studied. Treatment of 1 with isocyanates led to derivatives of imidoformamide [(dpp-bian)Ga{C(=NPh)2}2–NPh][Na(DME)3] (2), biuret [(dpp-bian)Ga(NCy)2(CO)2NCy][Na(DME)] (3), or carbamic acids [(dpp-bian)GaN(Cy)C(O)O]2[Na(THF)(Et2O)] (4), [(dpp-bian)GaC(=NCy)N(Cy)C(O)O][Na(Py)3] (5). Treatment of 1 with 2 equiv. of Ph2CO resulted in gallium pinacolate [(dpp-bian)GaO(CPh2)2O][Na(Py)2] (9)

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Adetoro, Ahmed, Suleiman O. Idris, Ameh D. Onu та Friday G. Okibe. "The Kinetics of the Oxidation of Lysine by μ-Peroxo-Bridged Binuclear Cobalt (III) Complex of Succinimide in Aqueous Hydrochloric Acid Medium". Annals of Science and Technology 2, № 1 (2017): 37–43. http://dx.doi.org/10.2478/ast-2018-0006.

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AbstractKinetics of oxidation of Lysine (Lys) and mechanisms by μ-peroxo bis[bis(ethylenediamine)succinimidato-dicobalt(III)]dinitratedihydrate; [LCo(μ-O2)CoL](NO3)2.2H2O (L = suc(en)2), hereafter the complex, was investigated at 420 nm wavelength of maximum absorption of the complex under the conditions hydrogen ions concentration = 1.8 × 10−2 mol dm−3, temperature = 24 ± 1 °C, [LCo(μ-O2)CoL2+] = 1.4 × 10−4 mol dm−3 and ionic strength = 0.5 mol dm−3. First order in [LCo(μ-O2)CoL2+] and [Lys] were obtained but inverse first order in [H+]. The proposed overall rate equation is as shown:$$Rate =

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35

Moore, J. D., A. R. Hawkins, I. G. Charles, et al. "Characterization of the type I dehydroquinase from Salmonella typhi." Biochemical Journal 295, no. 1 (1993): 277–85. http://dx.doi.org/10.1042/bj2950277.

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The type I dehydroquinase from the human pathogen Salmonella typhi was overexpressed in an Escherichia coli host and purified to homogeneity. The S. typhi enzyme was characterized in terms of its kinetic parameters, important active-site residues, thermal stability and c.d. and fluorescence properties. In all important respects, the enzyme from S. typhi behaves in a very similar fashion to the well-characterized enzyme from E. coli, including the remarkable conformational stabilization observed on reduction of the substrate/product mixture by NaBH4. This gives confidence that the information f

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36

Langkjær, Mette, Erik Larsen, Sine Larsen, Nevenka Brničević, and Francesco Salvatore. "A Planar, Spin-Triplet Cobalt(III) Complex. The Crystal and Molecular Structure of the Tetrabutylammonium Salt of an Anionic Complex of a Quadridentate Ligand Derived from Biuret." Acta Chemica Scandinavica 39a (1985): 187–97. http://dx.doi.org/10.3891/acta.chem.scand.39a-0187.

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37

Taş, Murat, and Orhan Büyükgüngör. "Synthesis and structural characterization of a novel peroxo bridged dinuclear cobalt(III) complex of succinimide showing three varieties of hydrogen bonding interactions." Journal of Chemical Sciences 121, no. 3 (2009): 267–73. http://dx.doi.org/10.1007/s12039-009-0029-4.

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Tsai, Anna E., and Kyriakos Komvopoulos. "Dynamics of Tribofilm Formation in Boundary Lubrication Investigated Using In Situ Measurements of the Friction Force and Contact Voltage." Materials 17, no. 6 (2024): 1335. http://dx.doi.org/10.3390/ma17061335.

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The complex dynamics of tribofilm formation on boundary-lubricated steel surfaces were investigated in real time by combining in situ measurements of the temporal variation of the coefficient of friction and contact voltage. Sliding experiments were performed with various blends consisting of base oil, zinc dialkyl dithiophosphate (ZDDP) additive, and two different dispersants at an elevated oil temperature for a wide range of normal load and fixed sliding speed. The evolution of the transient and steady-state coefficient of friction, contact voltage, and critical sliding distance (time) for s

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Bishop, Michael M., Leonard F. Lindoy, Srihari Mahadev, and Peter Turner. "Modification of supramolecular motifs: perturbation of the structure of an extended hydrogen-bonded biuret array by interaction with an intercalated copper complex and methanol molecules †." Journal of the Chemical Society, Dalton Transactions, no. 3 (2000): 233–34. http://dx.doi.org/10.1039/a909359a.

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KUNIYA, Joji. "Analysis of complex formation of zinc O,O'-dibutyl dithiophosphate and "polyamine-polyisobutenyl succinimide" by thin-layer chromatographic determination of zinc O,O'-dialkyl dithiophosphate." NIPPON KAGAKU KAISHI, no. 1 (1990): 30–37. http://dx.doi.org/10.1246/nikkashi.1990.30.

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41

Rozi, Normazida, Sharina Abu Hanifah, Nurul Huda Abd Karim, Lee Yook Heng, Sayuri L. Higashi та Masato Ikeda. "Enhancing Electrochemical Biosensor Performance for 17β-Estradiol Determination with Short Split—Aptamers". Biosensors 12, № 12 (2022): 1077. http://dx.doi.org/10.3390/bios12121077.

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Chronic exposure of 17β-estradiol (E2) even at low concentration can disorganize the endocrine system and lead to undesirable health problems in the long run. An electrochemical biosensor for rapid detection of E2 in water samples was successfully developed. The biosensor was based on split DNA aptamers attached onto poly (methacrylic acid-co-n butyl acrylate-succinimide) microspheres deposited on polypyrrole nanowires coated electrode (PPY/PMAA-NBA). The sandwich paired of split DNA aptamers used were truncated from 75 mer parent aptamers. These two strands of 12-mer and 14-mer split DNA apta

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Chyła-Danił, Gabriela, Kornelia Sałaga-Zaleska, Ewelina Kreft, et al. "Long-Term Effects of Suramin on Renal Function in Streptozotocin-Induced Diabetes in Rats." International Journal of Molecular Sciences 24, no. 19 (2023): 14671. http://dx.doi.org/10.3390/ijms241914671.

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In short-term diabetes (3 weeks), suramin, a drug used clinically, affects renal function and the expression of vascular endothelial growth factor A (VEGF-A), which may be involved in the pathogenesis of diabetic nephropathy, the main cause of end-stage renal disease. In the present study, we evaluated the long-term (11 weeks) effects of suramin (10 mg/kg, i.p., once-weekly) in diabetic rats. Concentrations of VEGF-A, albumin, soluble adhesive molecules (sICAM-1, sVCAM-1), nucleosomes, and thrombin–antithrombin complex (TAT) were measured by ELISA, total protein was measured using a biuret rea

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Razjouyan, Javad, Hamidreza Zolata, Omid Khayat, Fereidoun Nowshiravan, Nami Shadanpour, and Meisam Mohammadnia. "Synthesis and evaluation of radiolabeled, folic acid-PEG conjugated, amino silane coated magnetic nanoparticles in tumor bearing Balb/C mice." Nukleonika 60, no. 3 (2015): 497–502. http://dx.doi.org/10.1515/nuka-2015-0066.

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Abstract To design a potent agent for positron emission tomography/magnetic resonance imaging (PET/MRI) imaging and targeted magnetic hyperthermia-radioisotope cancer therapy radiolabeled surface modified superparamagnetic iron oxide nanoparticles (SPIONs) were used as nanocarriers. Folic acid was conjugated for increasing selective cellular binding and internalization through receptor-mediated endocytosis. SPIONs were synthesized by the thermal decomposition of tris (acetylacetonato) iron (III) to achieve narrow and uniform nanoparticles. To increase the biocompatibility of SPIONs, they were

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Nguyen, T. D., M. S. Wolfe, and G. G. Heintz. "Solubilization of receptors for pancreatic polypeptide from rat liver membranes." American Journal of Physiology-Gastrointestinal and Liver Physiology 268, no. 2 (1995): G215—G223. http://dx.doi.org/10.1152/ajpgi.1995.268.2.g215.

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We have previously identified, on rat liver microsomes and plasma membranes, proteins that bind pancreatic polypeptide (PP) with high affinity and specificity and that may serve as receptors for a hepatic effect of PP (J. Biol. Chem. 267: 9416-9421, 1992). Further characterization of these proteins requires the solubilization of receptors with conserved ability to bind PP selectively and efficiently. In this report, using 6 mM of the zwitterionic detergent 3-[(3-cholamidopropyl)-dimethylammonio]-1-propanesulfonate (CHAPS), we solubilized, from liver microsomes, receptors that bound PP with hig

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45

Sharma, Pankaj, Sameer Kale, Swapnil Phugare, Sunil Kumar Goel, and Sunil Gairola. "Analytical Challenges in Novel Pentavalent Meningococcal Conjugate Vaccine (A, C, Y, W, X)." Vaccines 12, no. 11 (2024): 1227. http://dx.doi.org/10.3390/vaccines12111227.

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Multivalent meningococcal conjugate vaccines are a significant focus for the scientific community in light of the WHO’s mission to defeat meningitidis by 2030. Well-known meningococcal vaccines such as MenAfriVac, Nimenrix, Menveo, and MenQuadfi are licensed in various parts of the world and have been successful. Recently, the World Health Organization (WHO) qualified MenFive (meningococcal A, C, Y, W, and X) conjugate vaccine, further enhancing the battery of vaccines against meningitis. The antigenic nature of the current and new serogroups, the selection of carrier proteins, and the optimal

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Collins, M. J., E. R. Waite, and A. C. T. van Duin. "Predicting protein decomposition: the case of aspartic–acid racemization kinetics." Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences 354, no. 1379 (1999): 51–64. http://dx.doi.org/10.1098/rstb.1999.0359.

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The increase in proportion of the non–biological (D–) isomer of aspartic–acid (Asp) relative to the L–isomer has been widely used in archaeology and geochemistry as a tool for dating. The method has proved controversial, particularly when used for bones. The non–linear kinetics of Asp racemization have prompted a number of suggestions as to the underlying mechanism(s) and have led to the use of mathematical transformations which linearize the increase in D–Asp with respect to time. Using one example, a suggestion that the initial rapid phase of Asp racemization is due to a contribution from as

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Fan, Bing Li, An Nan Sun, Zheng Jie Li, Yi Wei Guo, Xiao Wen Qi, and Chang Xin Liu. "Experimental Study on Dissolution Stability and Dispersion and their Influence on Tribological Properties for Reducing Friction and Prolonging Life of Armored Vehicle Engine Lubricating Oil Additives." Advanced Engineering Forum 49 (May 31, 2023): 15–27. http://dx.doi.org/10.4028/p-ba6mc5.

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A lubricating oil additive for armored vehicle engine was synthesized by ultrasonic dispersion and physical blending with polyisobutylene and poly alpha olefin as polymer matrix, nanoBN and nanoALN as antifriction materials and polyisobutylene succinimide as surfactant. Polymer-based lubricating oil additive, hydroxyl magnesium silicate powder additive, commercial anti-wear repairing agent Goldway and commercial anti-wear protective agent Chief were dispersed into 10W-40 armored vehicle engine special lubricating oil according to a certain mass fraction. The dissolution stability of different

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48

Goodgame, David M. L., Caroline A. O'Mahoney, Steven D. Plank, and David J. Williams. "Formation of an unusual polymeric 24-membered macrocyclic complex of praseodymium(III): X-ray crystal structure of [Pr(Ph3PAuL)2(NO3)3]n (L = succinimide anion) and of its (Ph3P)AuL precursor." Polyhedron 12, no. 22 (1993): 2705–10. http://dx.doi.org/10.1016/s0277-5387(00)80121-7.

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Wang, Ping, Tie-Feng Sun, Gang Li, et al. "The Separation of Antler Polypeptide and Its Effects on the Proliferation and Osteogenetic Differentiation of Bone Marrow Mesenchymal Stem Cells." Evidence-Based Complementary and Alternative Medicine 2020 (September 30, 2020): 1–10. http://dx.doi.org/10.1155/2020/1294151.

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Background. Colla Cornus Cervi (CCC) has been used as a traditional Chinese medicine in the treatment of osteoporosis and osteonecrosis of the femoral head. However, the bioavailability of CCC is seriously limited owing to its large molecular weight and complex ingredients. In the present study, antler polypeptide was separated from CCC, and the effects of antler polypeptide on rat bone marrow mesenchymal stem cells (BMSCs) were investigated. Methods. Antler polypeptide was separated from Colla Cornus Cervi by ultrafiltration into different samples according to the molecular weight. The total

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Isah, S. Y., S. L. Abubakar, S. B. Danladi, et al. "Assessment of lipid profile in-patients with Nephrotic syndrome in Kano Metropolis." Bayero Journal of Pure and Applied Sciences 14, no. 1 (2021): 251–57. http://dx.doi.org/10.4314/bajopas.v14i1.29.

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Nephrotic syndrome (NS) is a complex kidney disease associated with numerous complications which can subsequently lead to cardiovascular disease among others. This study was aimed at assessing the lipid profile, serum and urinary proteins of patients with Nephrotic syndrome (NS) in Kano metropolis. A total of 50 NS patients and 25 apparently healthy volunteers(controls) were recruited for the study, made up of 32 males and 18 females with the age range of 4-70 years. Blood and urine sample were collected from the participants. Serum urea and creatinine were determined using urease berthelot’s

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