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Articles de revues sur le sujet « Hydroxy urea »

Auteur : Grafiati

Publié le 7 juin 2025

Mis à jour le 2 août 2025

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1

Lin, Rui Hang, Xiao Bo Wang, Xiao Feng Zhu, and Zhen Zhong Gao. "Study on Modification of UFRA by Enzyme Hydrolysis Prepared Oxidized Starch." Applied Mechanics and Materials 268-270 (December 2012): 574–79. http://dx.doi.org/10.4028/www.scientific.net/amm.268-270.574.

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In this work, we concentrate on the preparation of oxidized starch modification reagent by enzymatic hydrolysis pretreatment, preparation of the urea-formaldehyde resin with low toxicity. The performance of modified urea-formaldehyde resin depend on the oxidation degree of oxidized starch and whether using enzymatic hydrolysis pretreatment or not. 100-PH9-HOS(the starch enzymatic hydrolysis then oxidized in 100°C with pH 9) synthetized modified urea-formaldehyde resin (100-PH9-HOS-UF) only with a free formaldehyde content of 0.14%, the lowest formaldehyde emission of 0.6078mg/L. Infrared spect

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2

Agil, A., and S. M. H. Sadrzadeh. "Hydroxy-urea protects erythrocytes against oxidative damage." Redox Report 5, no. 1 (2000): 29–34. http://dx.doi.org/10.1179/rer.2000.5.1.29.

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Jurczak, Janusz, Maciej Majdecki, Patryk Niedbała, and Agata Tyszka-Gumkowska. "Assisted by Hydrogen-Bond Donors: Cinchona Quaternary Salts as Privileged Chiral Catalysts for Phase-Transfer Reactions." Synthesis 53, no. 16 (2021): 2777–86. http://dx.doi.org/10.1055/a-1472-7999.

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AbstractThis short review is devoted to asymmetric phase-transfer reactions that employ hybrid ammonium Cinchona catalysts supported by possessing hydrogen-bond donor groups. We present recent advances utilizing this type of catalyst in the field of biphasic reaction systems. The main emphasis is placed on the advantages of additional functional groups present in the structure of the catalyst, such as hydroxy, amide, (thio)urea or squaramide.1 Introduction2 Phase-Transfer Hybrid Cinchona Catalysts with a Free Hydroxy Group3 (Thio)urea Hybrid Cinchona Catalysts4 Hybrid Amide-Based Catalysts Bea

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Kaurav, Manvendra S., Pramod K. Sahu, Praveen K. Sahu, et al. "An efficient, mild and metal freel-proline catalyzed construction of fused pyrimidines under microwave conditions in water." RSC Advances 9, no. 7 (2019): 3755–63. http://dx.doi.org/10.1039/c8ra07517d.

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Djunaidi, Muhammad Cholid, Denandha Putri Ayuningrum, Nesti Dwi Maharani, et al. "Synthesis of Printed Hollow Fiber Membranes Urea as a Membrane Candidate Hemodialysis." Indonesian Journal of Chemistry 24, no. 6 (2024): 1583. https://doi.org/10.22146/ijc.83068.

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Chronic kidney failure is a disease that affects the world's population and an alternative solution is hemodialysis. Hemodialysis is the process of cleaning the blood from urea and creatinine through a semi-permeable membrane in the form of a hollow fiber membrane (HFM) with the following advantages: flexible and low energy requirements. The weaknesses of commercial hemodialysis membranes are that they are hydrophobic, chemical resistant, and low biocompatibility. This research uses a membrane of polysulfone combined with eugenol and polyethylene glycol (PEG) or polyethylene glycol diglycidyl

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Kanevskaya, I. V., N. V. Pchelintseva та O. V. Fedotova. "Functionalization of 4-hydroxy-6-methyl-2Н-pyran-2-one under the conditions of the modified Biginelli reaction". Журнал органической химии 59, № 4 (2023): 466–74. http://dx.doi.org/10.31857/s0514749223040055.

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The features of the interaction of 4-hydroxy-6-methyl-2 H -pyran-2-one with aromatic aldehydes and urea in the one-pot mode of the classical mode, as well as using thermal and microwave activation of The Biginelli reaction variants, were studied. Depending on the conditions of single-reactory processes, previously unknown 3-[amino(aryl)methyl]-4-hydroxy-6-methyl-2 H -pyran-2-one, arylmethylenebis-4-hydroxy-6-methyl-2 H -pyran2-one, hybrid system - 2-hydroxy-7-methyl-4-(3-nitrophenyl)-4,4a-dihydro-5 H -pyrano[4,3- d ]pyrimidine-5-one in the case of transformation with aryl aldehyde containing a

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Choi, Hyeong, Yong Suk Shim, Sung Chun Lee, Sung Kwon Kang, and Chang Keun Sung. "1-(2-Hydroxy-2-phenylethyl)-3-(4-methoxyphenyl)urea." Acta Crystallographica Section E Structure Reports Online 67, no. 10 (2011): o2632. http://dx.doi.org/10.1107/s1600536811036464.

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Pande, S. K., S. P. Vyas, and V. K. Dixit. "Hydroxy-urea bearing albumin microspheres—preparation, characterization and evaluation." Journal of Microencapsulation 8, no. 1 (1991): 9–19. http://dx.doi.org/10.3109/02652049109021853.

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Tan, Ming Yueh, Karen A. Crouse, Thahira B. S. A. Ravoof, Mukesh M. Jotani, and Edward R. T. Tiekink. "3-{(E)-[4-(4-Hydroxy-3-methoxyphenyl)butan-2-ylidene]amino}-1-phenylurea: crystal structure and Hirshfeld surface analysis." Acta Crystallographica Section E Crystallographic Communications 74, no. 1 (2018): 21–27. http://dx.doi.org/10.1107/s2056989017017273.

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Two independent molecules (AandB) comprise the asymmetric unit of the title compound, C18H21N3O3. The urea moiety is disubstituted with one amine being linked to a phenyl ring, which is twisted out of the plane of the CN2O urea core [dihedral angles = 25.57 (11) (A) and 29.13 (10)° (B)]. The second amine is connected to an imine (Econformation), which is linked in turn to an ethane bridge that links a disubstituted benzene ring. Intramolecular amine-N—H...N(imine) and hydroxyl-O—H...O(methoxy) hydrogen bonds closeS(5) loops in each case. The molecules have twisted conformations with the dihedr

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Pavić, Kristina, Zrinka Rajić, Zvonimir Mlinarić, Lidija Uzelac, Marijeta Kralj, and Branka Zorc. "Chloroquine Urea Derivatives: Synthesis and Antitumor Activity in Vitro." Acta Pharmaceutica 68, no. 4 (2018): 471–83. http://dx.doi.org/10.2478/acph-2018-0039.

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Abstract In the current paper, we describe the design, synthesis and antiproliferative screening of novel chloroquine derivatives with a quinoline core linked to a hydroxy or halogen amine through a flexible aminobutyl chain and urea spacer. Synthetic pathway leading to chloroquine urea derivatives 4-10 includes two crucial steps: i) synthesis of chloroquine benzotriazolide 3 and ii) formation of urea derivatives through the reaction of compound 3 with the corresponding amine. Testing of antiproliferative activity against four human cancer cell lines revealed that chloroquine urea derivatives

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Serrano, Inmaculada, David Monge, Eleuterio Álvarez, Rosario Fernández та José M. Lassaletta. "Asymmetric organocatalytic synthesis of quaternary α-hydroxy phosphonates: en route to α-aryl phosphaisoserines". Chemical Communications 51, № 19 (2015): 4077–80. http://dx.doi.org/10.1039/c4cc10390d.

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The dual activation of acyl phosphonates and formaldehyde tert-butyl hydrazone by a BINAM-derived bis-urea catalyst is the key to achieve high reactivities and enantioselectivities in the synthesis of densely functionalized quaternary α-hydroxy phosphonates.

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Phongprueksathat, Nat, Atul Bansode, Takashi Toyao, and Atsushi Urakawa. "Greener and facile synthesis of Cu/ZnO catalysts for CO2 hydrogenation to methanol by urea hydrolysis of acetates." RSC Advances 11, no. 24 (2021): 14323–33. http://dx.doi.org/10.1039/d1ra02103f.

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Sodium- and nitrate-free hydroxy-carbonate precursors were prepared via urea hydrolysis co-precipitation of acetate salt, which is simpler with fewer steps, even without the need for a washing and pH control, rendering the synthesis more sustainable.

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Y., Jadegoud, B. Ijare Omkar, N. Mallikarjuna N., D. Angadi S., and H. M. Mruthyunjayaswamy B. "Synthesis and antimicrobial activity of copper-, cobalt- and nickel(II) complexes with Schiff bases." Journal of Indian Chemical Society Vol. 79, Dec 2002 (2002): 921–24. https://doi.org/10.5281/zenodo.5847948.

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Department of Chemistry, Gulbarga University. Gulbarga-585 106, India <em>E-mail </em>: root@guluni.kar.nic.in         <em>  Fax :</em> 91-08472-21632 <em>Manuscript received 1 January 2002, accepted 12 July 2002</em> A few complexes of Cu<sup>II</sup>, Co<sup>II</sup> and Ni<sup>II</sup> have been prepared by reacting their metal(ll) chlorides with 3-(4'-phenylthiazole-2'-yl)- 1-(2' -hydroxy-l' -iminomcthylphenly)urea and with 3-(4' -phenylthiazole-2' -yl)-1-(2' ,4' -dihydroxy/2' -hydroxy-5' -chloro-1 '-m

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Pang, Minhui, Zirui Liu, Hongyan Li, Lina Liang, and Lixia Li. "Effect of Fatty Acids on Vegetable-Oil-Derived Sustainable Polyurethane Coatings for Controlled-Release Fertilizer." Coatings 14, no. 9 (2024): 1183. http://dx.doi.org/10.3390/coatings14091183.

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Vegetable-oil-based polyurethane has become a promising sustainable candidate for controlled-release fertilizer based on green chemistry. The purpose of this study was to prepare a series of coatings from selective feedstocks including five vegetable oils with a high saturation degree, mono-unsaturation degree, or poly-unsaturation degree, considering that vegetable oil fatty acids played a key role in the synthesis of polyol and polyurethane. The effect of the type and proportion of fatty acids on the physicochemical properties, microstructure, and macro-properties of vegetable-oil-derived po

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Khramtsova, Ekaterina E., Ekaterina A. Lystsova, Evgeniya V. Khokhlova, Maksim V. Dmitriev, and Andrey N. Maslivets. "Amination of 5-Spiro-Substituted 3-Hydroxy-1,5-dihydro-2H-pyrrol-2-ones." Molecules 26, no. 23 (2021): 7179. http://dx.doi.org/10.3390/molecules26237179.

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The 3-hydroxy-1,5-dihydro-2H-pyrrol-2-one motif is a valuable scaffold in drug discovery. The replacement of the 3-oxy fragment in 3-hydroxy-1,5-dihydro-2H-pyrrol-2-ones-based compounds with a 3-amino one (3-amino analogs of 3-hydroxy-1,5-dihydro-2H-pyrrol-2-ones, 3-amino-1,5-dihydro-2H-pyrrol-2-ones) can play a crucial role in their biological effect. Thus, approaches to 3-amino-1,5-dihydro-2H-pyrrol-2-ones are of significant interest. We developed an approach to 5-spiro-substituted 3-amino-1,5-dihydro-2H-pyrrol-2-ones that could not be obtained using previously reported approaches (reactions

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16

Derevnina, Alexandra O., Anastasia A. Andreeva, and Andrey N. Maslivets. "(Z)-N-Carbamoyl-4-hydroxy-4-(4-methoxyphenyl)-2-oxobut-3-enamide." Molbank 2024, no. 3 (2024): M1844. http://dx.doi.org/10.3390/m1844.

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The reaction of 5-(4-methoxyphenyl)furan-2,3-dione with urea in a 1:1 ratio when refluxed in a mixture of 1,2-dichloroethane-DMSO gives (Z)-N-carbamoyl-4-hydroxy-4-(4-methoxyphenyl)-2-oxobut-3-enamide in a good yield. This compound was fully characterized.

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Buga, G. M., R. Singh, S. Pervin, et al. "Arginase activity in endothelial cells: inhibition by NG-hydroxy-L-arginine during high-output NO production." American Journal of Physiology-Heart and Circulatory Physiology 271, no. 5 (1996): H1988—H1998. http://dx.doi.org/10.1152/ajpheart.1996.271.5.h1988.

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Rat aortic endothelial cells were found to contain both constitutive and lipopolysaccharide (LPS)-inducible arginase activity. Studies were performed to determine whether induction of nitric oxide synthase (NOS) by LPS and cytokines is accompanied by sufficient arginase induction to render arginine concentrations rate limiting for high-output NO production. Unactivated cells contained abundant arginase activity accompanied by continuous urea formation. LPS induced the formation of both inducible NOS (iNOS) and arginase, and this was accompanied by increased production of NO, citrulline, and ur

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Htun, M. Than, A. Suwaiyan, A. Baig, and Uwe K. A. Klein. "Excited-State Proton Transfer from 4-Hydroxy-1-naphthalenesulfonate to Urea." Journal of Physical Chemistry A 102, no. 43 (1998): 8230–35. http://dx.doi.org/10.1021/jp981709j.

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Randad, Ramnarayan S., Rajan H. Naik, Sergei V. Gulnik, Betty Yu, and John W. Erickson. "Symmetry-based HIV protease inhibitors containing a hydroxy bis-urea isostere." Bioorganic & Medicinal Chemistry Letters 4, no. 19 (1994): 2343–46. http://dx.doi.org/10.1016/0960-894x(94)85037-2.

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Couvercelle, J. P., V. Bailleul, and C. Bunel. "Synthesis, dispersion and properties of hydroxy polybutadiene-based anionic polyurethane-urea." Macromolecular Symposia 151, no. 1 (2000): 347–52. http://dx.doi.org/10.1002/1521-3900(200002)151:1<347::aid-masy347>3.0.co;2-t.

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Vora, J. J., S. B. Vasava, Asha D. Patel, K. C. Parmar, S. K. Chauhan, and S. S. Sharma. "Synthesis, Characterization and Antibacterial Activity of a New Series of s-Triazines Derived with Quinolines." E-Journal of Chemistry 6, no. 1 (2009): 201–6. http://dx.doi.org/10.1155/2009/812341.

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8-Hydroxy quinoline was synthesized using Skraup reaction. This was condensed with trichloro-s-triazine. The product of the above reaction was allowed to react with triazole derivative. Finally, urea derivatives were allowed to react and the products were characterized by conventional and instrumental methods. Their structures were determined and important biochemical properties were studied

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Muresan, Laura, Adrian Cadis, Ioana Perhaita, and Emil Indrea. "Morpho-structural and luminescence investigations on yttrium silicate based phosphors prepared with different precipitating agents." Open Chemistry 12, no. 10 (2014): 1023–31. http://dx.doi.org/10.2478/s11532-014-0553-z.

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AbstractYttrium silicate doped with cerium (Y2SiO5:Ce) was obtained from Y-Ce-Si based precursors prepared by the simultaneous addition of reagents (SimAdd) technique. The synthesis of the precursors was done in well controlled conditions using ammonium oxalate, ammonium carbonate or urea as precipitating agents. Results regarding the influence of precipitating agents on the morpho structural and photoluminescent characteristics of Y2SiO5:Ce are reported. The TG analysis in correlation with EGA, FT-IR and XRD investigations reveals the formation of oxalate, hydroxy-carbonate or hydroxy-nitrate

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Wong, Emily S. W., Ricky Y. K. Man, Kwok F. J. Ng, Susan W. S. Leung, and Paul M. Vanhoutte. "L-arginine and Arginase Products Potentiate Dexmedetomidine-induced Contractions in the Rat Aorta." Anesthesiology 128, no. 3 (2018): 564–73. http://dx.doi.org/10.1097/aln.0000000000002032.

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Abstract Background The α2-adrenergic sedative/anesthetic agent dexmedetomidine exerts biphasic effects on isolated arteries, causing endothelium-dependent relaxations at concentrations at or below 30 nM, followed by contractions at higher concentrations. l-arginine is a common substrate of endothelial nitric oxide synthase and arginases. This study was designed to investigate the role of l-arginine in modulating the overall vascular response to dexmedetomidine. Methods Isometric tension was measured in isolated aortic rings of Sprague Dawley rats. Cumulative concentrations of dexmedetomidine

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Kareem, Semiu A., Idayatu Dere, Daniel T. Gungula, et al. "Synthesis and Characterization of Slow-Release Fertilizer Hydrogel Based on Hydroxy Propyl Methyl Cellulose, Polyvinyl Alcohol, Glycerol and Blended Paper." Gels 7, no. 4 (2021): 262. http://dx.doi.org/10.3390/gels7040262.

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In this study, biodegradable slow-release fertilizer (SRF) hydrogels were synthesized from hydroxyl propyl methyl cellulose (HPMC), polyvinyl alcohol (PVA), glycerol and urea (SRF1) and HPMC, PVA, glycerol, urea and blended paper (SRF2). The fertilizer hydrogels were characterized by SEM, XRD and FTIR. The swelling capacity of the hydrogels in both distilled and tap water as well as their water retention capacity in sandy soil were evaluated. The hydrogels had good swelling capacity with maximum swelling ratio of 17.2 g/g and 15.6 g/g for SRF1 and SRF2 in distilled, and 14.4 g/g and 15.2 g/g i

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Journal, Baghdad Science. "Spectroscopic Study for Resonance Effects on the Carbonyl Double Bond Order in Urea Schiff Bases Which Contain Conjugated System." Baghdad Science Journal 8, no. 3 (2011): 711–16. http://dx.doi.org/10.21123/bsj.8.3.711-716.

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In this work we prepared some schiff bases by condensation urea and benzaldehyde or its derevative ( bromo benzaldehyde or hydroxy benzaldehyde ) as ( 1 : 1 ) mole ( urea : benzaldehyde or its substitution ) to prepare compounds ( A1 , B1 , C1 , D1 , E1 , F1 , G1 ) and ( 1 : 2 ) mole ( urea : benzaldehyde or its substitution ) to prepare compounds ( A2 , B2 , C2 , D2 , E1 , F2 , G2 ) . The prepared compounds identified spectroscopic by infrared spectroscopy FT-IR and Thin layer chromotography T.L.C . The force constant calculated from the wave number for the carbonyl stretching from FT-IR char

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Kshash, Abdullah H., Mohammed O. Ezzat, and Ziad K. Abdul Razzak. "Spectroscopic Study for Resonance Effects on the Carbonyl Double Bond Order in Urea Schiff Bases Which Contain Conjugated System." Baghdad Science Journal 8, no. 3 (2011): 711–16. http://dx.doi.org/10.21123/bsj.2011.8.3.711-716.

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In this work we prepared some schiff bases by condensation urea and benzaldehyde or its derevative ( bromo benzaldehyde or hydroxy benzaldehyde ) as ( 1 : 1 ) mole ( urea : benzaldehyde or its substitution ) to prepare compounds ( A1 , B1 , C1 , D1 , E1 , F1 , G1 ) and ( 1 : 2 ) mole ( urea : benzaldehyde or its substitution ) to prepare compounds ( A2 , B2 , C2 , D2 , E1 , F2 , G2 ) . The prepared compounds identified spectroscopic by infrared spectroscopy FT-IR and Thin layer chromotography T.L.C . The force constant calculated from the wave number for the carbonyl stretching from FT-IR char

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Srivastava, S. C., M. A. Haque, and L. J. Paliwal. "4-Hydroxy Acetophenone-Urea-Formaldehyde Terpolymer: Properties and Applications as Ion Exchanger." Materials Today: Proceedings 4, no. 4 (2017): 5692–99. http://dx.doi.org/10.1016/j.matpr.2017.06.032.

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Pestunovich, Vadim A., Alexander I. Albanov, Sergey A. Pogozhikh, Yuri E. Ovchinnikov, and Nataliya F. Lazareva. "N-[hydroxy(dimethyl)silylmethyl]-N,N′-propylene urea hydrochloride: Synthesis and structure." Journal of Molecular Structure 1024 (September 2012): 136–41. http://dx.doi.org/10.1016/j.molstruc.2012.05.017.

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Bhadani, Vijay N., Piyush A. Patel, Heta D. Purohit, and Dipak M. Purohit. "Synthesis, Antibacterial and Antifungal Activity of 5-Aryl Amido-6-Isopropyl-2-(Mercapto/Hydroxy)-4-[(4′-Difluoro Methoxy) (3′-Hydroxy) Phenyl]-1,4-Dihydro Pyrimidine." International Letters of Chemistry, Physics and Astronomy 51 (May 2015): 54–60. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.51.54.

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Various isopropylacetoacetanilides were treated with 4-(difluoromethoxy)-3-hydroxy benzaldehyde and thiourea/urea in the presence of acid catalyst to produce the 1,4-dihydropyrimidine derivatives (4a-5i and 5a-5i) with good yields. All the synthesized compounds were characterized by mass, 1H-NMR and IR spectrum, also evaluated for antibacterial and antifungal activity against two Gram +ve and two Gram-ve bacterial and fungi strains. The compounds 4e, 4g and 5d were found comparatively promising active against all the bacterial and fungal strains.

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Bhadani, Vijay N., Piyush A. Patel, Heta D. Purohit, and Dipak M. Purohit. "Synthesis, Antibacterial and Antifungal Activity of 5-Aryl Amido-6-Isopropyl-2-(Mercapto/Hydroxy)-4-[(4′-Difluoro Methoxy) (3′-Hydroxy) Phenyl]-1,4-Dihydro Pyrimidine." International Letters of Chemistry, Physics and Astronomy 51 (May 15, 2015): 54–60. http://dx.doi.org/10.56431/p-63je0o.

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Various isopropylacetoacetanilides were treated with 4-(difluoromethoxy)-3-hydroxy benzaldehyde and thiourea/urea in the presence of acid catalyst to produce the 1,4-dihydropyrimidine derivatives (4a-5i and 5a-5i) with good yields. All the synthesized compounds were characterized by mass, 1H-NMR and IR spectrum, also evaluated for antibacterial and antifungal activity against two Gram +ve and two Gram-ve bacterial and fungi strains. The compounds 4e, 4g and 5d were found comparatively promising active against all the bacterial and fungal strains.

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Yu, Tain-Jen, Ronald G. Sutherland, and Ronald E. Verrall. "The sonolysis of cytosine and thymine." Canadian Journal of Chemistry 65, no. 6 (1987): 1162–64. http://dx.doi.org/10.1139/v87-194.

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Sonolysis of cytosine has been studied at 630 kHz in the presence of air and nitrogen. The degradation products were identified by gas chromatographic – mass spectral analysis. Under aerated conditions the following products were found: urea, formyl urea, parabanic acid, isobarbituric acid, oxaluric acid, alloxan monohydrate, alloxantin, dialuric acid, and uracil glycols. Under nitrogen the degradation products were isobarbituric acid, alloxan monohydrate, and uracil glycols. The observed products have been used to develop a possible mechanism for the sonolytic degradation. There appears to be

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Sivakumar, Dhanavel, Jayaraman Thanusu, Vijayakumar Kanagarajan, Samuthira Nagarajan, Haridoss Manikandan, and Mannathusamy Gopalakrishnan. "One-pot Synthesis of 2-Hydroxy-1,4-Naphthoquinone (Lawsone)." Current Organic Synthesis 16, no. 3 (2019): 431–34. http://dx.doi.org/10.2174/1570179416666190111155328.

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Aims and Scope: The 2-hydroxy-1,4-naphthoquinone (lawsone) and 2,5-dihydroxy-1, 4-naphthoquninone (5-hydroxylawsone) are synthesized by one step process. The process involves an inexpensive catalyst urea hydrogen peroxide and a base (t-BuOK) in alcohol for the transformation of 1-naphthol or 2,5-dihydroxynaphthalene to lawsone or its derivatives in the presences of oxygen. The process is further directed to produce lawsone or its derivatives, with no extraneous heating to make it energetically efficient. The synthesized compounds are analyzed by FT-IR, 1H and 13C NMR spectral studies. Material

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Khоlikova, S., Sh. Ruziev, and G. Khakimova. "REACTIONS OF HETEROCYCLIZATION OF AMINES AND AMIDES WITH MONO- AND BIFUNCTIONAL COMPOUNDS." Znanstvena misel journal, no. 66 (May 23, 2022): 43–49. https://doi.org/10.5281/zenodo.6572651.

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The reactions of heterocyclization of amines and amides with mono- and bifunctional compounds have been investigated. Cyclocondensation reactions of urea and thiourea with hydroquinone were carried out under stationary conditions. Synthesized 5-hydroxy-1,3-benzoxo-2-thione with a yield of 92% of theory, and 5-hydroxy-1,3- benzoxo-2-one with a yield of 94% of theory. Indole and its derivatives have been synthesized by the reaction of aniline and its derivatives with glycols and triols at a temperature of 250-600С and a pressure of 1.1.105-1.107 Pa in the presence of catalysts (CdO, ZnO, PbO<su

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Prima Indra Budianto, Gregorius, Yari Mukti Wibowo, Hadiyanto Hadiyanto, Widayat Widayat, and Wisnu Arfian Anditya Sudjarwo. "Vinasse as Cultivation Medium of Chlorella sp. to Produce Poly–Hydroxy Butyrate in Various Limited Low–Cost Primary Nutrient." E3S Web of Conferences 226 (2021): 00018. http://dx.doi.org/10.1051/e3sconf/202122600018.

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Vinasse is ethanol wastewater that still contains nutrients. It can be medium cultivation for Chlorella sp. Cultivation Chlorella sp. in vinasse did not only minimize its COD content but also potentially produce Poly–Hydroxy Butyrate (PHB) in a limited nutrient. This paper presents a cultivation process of Chlorella sp. in vinasse on the various limited nutrient. Chlorella sp. was cultivated in vinasse by adding complete nutrient (urea and TSP), TSP (limited N), and urea (limited P). Experimental data was optimized by a mathematical model to predict the behavior of the Chlorella sp. in limited

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RANDAD, R. S., R. H. NAIK, S. V. GULNIK, B. YU, and J. W. ERICKSON. "ChemInform Abstract: Symmetry-Based HIV Protease Inhibitors Containing a Hydroxy Bis-Urea Isostere." ChemInform 26, no. 17 (2010): no. http://dx.doi.org/10.1002/chin.199517105.

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Djimadoum Mbanga, Bessimbaye Nadlaou, Issakou Bakarnga-Via, et al. "Epidemiological, therapeutic, cytogenetic, and molecular profile of chronic myeloid leukemia at the national reference university hospital of N’Djamena from 2010-2020, Chad." World Journal of Advanced Research and Reviews 10, no. 3 (2021): 127–40. http://dx.doi.org/10.30574/wjarr.2021.10.3.0269.

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The aim is to determine the epidemiological and cytogenetic profile (Philadelphia chromosome: Ph1) and the bcr-abl gene in patients with chronic myeloid leukemia (CML) and to assess the therapeutic response of patients to hydroxy-urea and Imatinib treatment. From January 1, 2010 to December 30, 2020, an observational study for diagnostic and analytical purposes was carried out in 54 cases of CML at the National Reference University Hospital (CHU-RN) of N’Djamena. All selected patients presented with splenomegaly on physical examination. Significant differences were observed between the proport

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Nabeel Mahdi Abed. "Effect of Vitamin D3 on Liver and Kidney Function of Diabetes Mellitus Male Rats." University of Thi-Qar Journal of Science 7, no. 2 (2020): 80–83. http://dx.doi.org/10.32792/utq/utjsci/v7i2.718.

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The present study was carried out in the animal house and laboratories of the College of Veterinary Medicine/ University of Basrah to investigate the role of the administration of vitamin D3 on liver and kidney function of alloxan induced toxic in mature male rats. For this purpose, 48 male rats were divided into 4 groups with 12 animals in each as the following; group (1), animals of were administered with D.W(0.2ml)/day by oral gavages for 6 weeks as control group, group(2) were injected intraperitoneally with 150 mg/kg b.w of alloxan as diabetic group, group (3) were injected with alloxan t

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BREL, A. K., S. V. LISINA, K. M. ETERSKOVA, and J. N. BUDAEVA. "SYNTHESIS OF N-ACYLATED UREA AND THIOUREA BASED ON HYDROXY AND METHOXYBENZOIC ACIDS AS POTENTIAL DRUGS." IZVESTIA VOLGOGRAD STATE TECHNICAL UNIVERSITY, no. 12(295) (December 2024): 21–27. https://doi.org/10.35211/1990-5297-2024-12-295-21-27.

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N-acylated ureas and thioureas based on hydroxy- and methoxybenzoic acids were synthesized using the Schotten-Baumann reaction in two stages without isolating the intermediate acyl chloride (one-pot multicomponent synthesis) under optimal conditions. The structure of the obtained compounds was confirmed by 1H and 13C NMR spectroscopy. The spectrum of biological activity of the compounds was estimated using the PASS (Predictor of Activity Spectra for Substance) program. Using the ChemAxon online platform, theoretical calculations of descriptor values such as hydrophilic-lipophilic balance (LogP

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Komorowski, Ludwik, and Kurt Niedenzu. "New Boron-Nitrogen Analogues of Uracil Derivatives [1]." Zeitschrift für Naturforschung B 44, no. 11 (1989): 1421–26. http://dx.doi.org/10.1515/znb-1989-1117.

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The reaction of Ν,N′-dimethylurea with 1,5-dimethyl-2,4-bis-(dimethylamino)-1,5-diaza-2,4-dibora-3-oxacyclohexan-6-one (2) in the melt proceeds with condensation of the urea to yield two major products: the acid 1,3,5-trimethyl-2-hydroxy-1,3,5-triaza-2-boracyclohexa-4,5-dione (la); and a mixture of the methylammonium (4 a) and dimethylammonium salt (4b) of the anion [{CH3N(u-CONCH3)2}2B]-. Analogous products were obtained from the reaction of 2 with Ν,Ν′,N″-triorganylbiurets. The 2-hydroxy derivatives of type 1 form 1:1 molar adducts with amines (3) of variable thermal stability. The anhydride

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Tan, Siyuan, and Garvin D. Crabtree. "Competition Between Perennial Ryegrass Sod and `Chardonnay' Wine Grapes for Mineral Nutrients." HortScience 25, no. 5 (1990): 533–35. http://dx.doi.org/10.21273/hortsci.25.5.533.

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Competition between perennial ryegrass (Lolium perenne L. `Manhattan II') sod and wine grapes (Vitis vinifera L. `Chardonnay') for mineral nutrients was investigated with three methods of vineyard floor vegetation management (bare floor, mowed, and unmowed sod) and three rates of urea application (0, 137, and 274 kg N/ha). Sod decreased N concentration of grape leaves in both 1986 and 1987; Fe concentration in 1986; and S, Ca, B, and Mn in 1987. Sod also reduced total content of all measured nutrients in grape leaves. Mowing did not alleviate this reduction in leaf nutrient content. A high rat

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Abuthahir, S. S. Syed, A. Jamal Abdul Nasser, and S. Rajendran S. Rajendran. "Inhibition of Mild Steel Corrosion by Nickel Complex of 1-(8-hydroxy quinolin-2yl-methyl) urea in Sodium Chloride solution." Indian Journal of Applied Research 3, no. 7 (2011): 116–19. http://dx.doi.org/10.15373/2249555x/july2013/31.

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Tantaru, Gladiola, Antonia Poiata, Nela Bibire, Alina Diana Panainte, Mihai Apostu, and Madalina Vieriu. "Synthesis and Biological Evaluation of a New Schiff Base and its Cu(II) Complex." Revista de Chimie 68, no. 3 (2017): 586–88. http://dx.doi.org/10.37358/rc.17.3.5506.

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A new Schiff base ligand, N-hydroxy-N�-salicylidene-urea was synthesized through the condensation of salicylaldehyde with hydroxyurea. The copper(II) complex of the Schiff base has been also obtained. Their structure has been proven using spectral methods such as UV-Vis, FT-IR, 1H-NMR and elemental analysis. The antimicrobial activity of the copper(II) complex was evaluated through comparison to the activity of the Schiff base on various bacterial strains. All tested compounds were very active against both gram-positive and gram-negative bacteria.

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Djimadoum, Mbanga, Nadlaou Bessimbaye, Bakarnga-Via Issakou, et al. "Epidemiological, therapeutic, cytogenetic, and molecular profile of chronic myeloid leukemia at the national reference university hospital of N'Djamena from 2010-2020, Chad." World Journal of Advanced Research and Reviews 10, no. 3 (2021): 127–40. https://doi.org/10.5281/zenodo.5066782.

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The aim is to determine the epidemiological and cytogenetic profile (Philadelphia chromosome: Ph1) and the bcr-abl gene in patients with chronic myeloid leukemia (CML) and to assess the therapeutic response of patients to hydroxy-urea and Imatinib treatment. From January 1, 2010 to December 30, 2020, an observational study for diagnostic and analytical purposes was carried out in 54 cases of CML at the National Reference University Hospital (CHU-RN) of N’Djamena. All selected patients presented with splenomegaly on physical examination. Significant differences were observed between the p

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Walser, M., S. Hill, and L. Ward. "Progression of chronic renal failure on substituting a ketoacid supplement for an amino acid supplement." Journal of the American Society of Nephrology 2, no. 7 (1992): 1178–85. http://dx.doi.org/10.1681/asn.v271178.

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Twelve patients with severe chronic renal failure (average initial GFR, 13 mL/min) were monitored for 4 to 23 months while receiving an essential amino acid supplement and were then switched to a ketoacid supplement for 6 to 40 months, while continuously receiving a very low-protein (0.3 g/kg), low-phosphorus (7 to 9 mg/kg) diet. Urinary urea N excretion indicated that actual dietary protein intake averaged 0.46 g/kg. Progression, estimated as the linear regression slope of radioisotopically determined GFR on time, slowed from -0.46 +/- 0.31 (SD) to -0.24 +/- 0.15 mL/min/month (P = 0.029). Ser

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Jiao, Lihui, Xiaowei Zhao, Huixin Liu, Xinyi Ye, Yun Li та Zhiyong Jiang. "Organocatalytic asymmetric conjugate addition of diaryloxazolidin-2,4-diones to nitroolefins: an efficient approach to chiral α-aryl-α-hydroxy carboxylic acids". Organic Chemistry Frontiers 3, № 4 (2016): 470–74. http://dx.doi.org/10.1039/c5qo00428d.

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Patel, Gajendra C., and M. M. Patel. "2-hydroxy, 4-methoxy-propiophenone-urea-formaldehyde copolymers and their application as ion-exchangers." Proceedings / Indian Academy of Sciences 103, no. 4 (1991): 539–47. http://dx.doi.org/10.1007/bf02874652.

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Wadhwa, Pankaj, Priti Jain, and Hemant Jadhav. "QSAR and Docking Studies of N-hydroxy Urea Derivatives as Flap Endonuclease-1 Inhibitors." Current Computer Aided-Drug Design 11, no. 4 (2016): 346–52. http://dx.doi.org/10.2174/1573409912666151124233628.

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Główka, M. L., and P. W. Codding. "Structure of N-[4-hydroxy-3,5-bis(1-pyrrolidinylmethyl)phenyl]-N'-(4-methoxyphenyl)urea." Acta Crystallographica Section C Crystal Structure Communications 47, no. 5 (1991): 1038–40. http://dx.doi.org/10.1107/s010827019001023x.

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Dinarvand, Rassoul, and Mehdi Ansari. "Temperature-modulated permeation of hydroxy urea through thermotropic liquid crystals embedded in poly-HEMA." Journal of Membrane Science 223, no. 1-2 (2003): 217–26. http://dx.doi.org/10.1016/s0376-7388(03)00340-5.

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Sutoto, M. T., H. Krisntanto, and A. W. Ambari. "Comparison between hydroxy-urea (HU) and mytomycin-C (MMC) as chemotherapy adjuvant on radiotheraphy." International Journal of Gynecology & Obstetrics 70 (2000): D87. http://dx.doi.org/10.1016/s0020-7292(00)84425-2.

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