Results 41 to 50 of about 186,568 (160)

Synthesis of Methacrylate Monomers with Antibacterial Effects Against S. Mutans

Molecules, 2011
A series of polymerizable quaternary ammonium compounds were synthesized with the aim of using them as immobilized antibacterial agents in methacrylate dental composites, and their structures were characterized by FT-IR, 1H-NMR, and 13C-NMR analysis ...
Jingwei He, Monica Österblad, Pekka K. Vallittu, Lippo V. J. Lassila, Eva Söderling   +4 more
doaj   +1 more source

Producing Novel Fibrinolytic Isoindolinone Derivatives in Marine Fungus Stachybotrys longispora FG216 by the Rational Supply of Amino Compounds According to Its Biosynthesis Pathway

Marine Drugs, 2017
Many fungi in the Stachybotrys genus can produce various isoindolinone derivatives. These compounds are formed by a spontaneous reaction between a phthalic aldehyde precursor and an ammonium ion or amino compounds.
Ying Yin, Qiang Fu, Wenhui Wu, Menghao Cai, Xiangshan Zhou, Yuanxing Zhang   +5 more
doaj   +1 more source

Ammonium compounds in stratospheric aerosols [PDF]

Tellus B: Chemical and Physical Meteorology, 1986
The circumstances under which morphological examination can provide a reliable guide to thecomposition of stratospheric particles are discussed. It is then shown that while stratosphericparticles often consist largely of sulfuric acid, there are occasions when ammoniated aerosols arepresent.
openaire   +2 more sources

SOLUBILIZAREA CARBONAŢILOR METALELOR GRELE CU COMPUŞI AI AMONIULUI DIN SOLUŢII APOASE

Studia Universitatis Moldaviae: Stiinte reale si ale naturii, 2015
Compuşii azotului amoniacal expun carbonaţii metalelor grele degradării chimice; ca rezultat, metalele solubilizate sunt spălate în apele naturale, poluându-le.
Elena MOŞANU, Tudor LUPAŞCU, Maria SANDU   +2 more
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Protocol for aqueous synthesis of bioactive quaternary ammonium betaine derivatives under blue LED

STAR Protocols
Summary: Quaternary ammonium compounds exhibit diverse applications as antibiotics, as surfactants, in paper industries, in sewage treatment, and in aquaculture.
Suchismita Rath, Subhabrata Sen
doaj   +1 more source

EFFECT OF NITROGEN FERTILIZATION ON SUGARS, ASCORBIC ACID AND PHENOLIC COMPOUNDS IN WHITE CABBAGE (Brassica oleracea var. capitata alba L.)

Acta Scientiarum Polonorum: Hortorum Cultus, 2010
The aim of this research was to determine the influence of various forms, diverse doses, and methods of application of nitrogen fertilizers and foliar nutrition on the concentration of soluble sugars, ascorbic acid and phenolic compounds in cabbage. The 
Włodzimierz Sady, Iwona Domagała-Świątkiewicz, Stanisław Rożek   +2 more
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Quaternary Ammonium Compounds and Their Composites in Antimicrobial Applications

Advanced Materials Interfaces
Quaternary ammonium compounds (QACs) are well‐known for their antimicrobial properties, but their widespread use is limited due to suboptimal antimicrobial efficiency and safety concerns.
Yining Yao, Zilin Ye, Yue Zhang, Yue Wang, Chengzhong Yu   +4 more
doaj   +1 more source

HEALTH RISK ASSESSMENT ASSOCIATED WITH NITROGEN COMPOUNDS CONTAMINATED DRINKING WATER IN MEDIAS REGION

Studia Universitatis Babes-Bolyai Chemia, 2016
High concentrations of nitrogen compounds in drinking water may cause negative health effects. The aim of the present study was to assess the content of nitrogen compounds namely, nitrates, nitrites and ammonium in drinking waters from Medias region ...
Maria-Alexandra RESZ (HOAGHIA), Mariana Lucia ANDREI, Oana CADAR, Lacrimioara SENILA, Erika Andrea LEVEI, Dumitru RISTOIU   +5 more
doaj  

Simultaneous Removal of Chemical Oxygen Demand (COD) and Ammonium ‎from Landfill Leachate Using Anaerobic Digesters

Majallah-i Dānishgāh-i ̒Ulūm-i Pizishkī-i Bābul, 2015
BACKGROUND AND OBJECTIVE: Leachate, which contains large amounts of ammonium and hazardous organic compounds, can lead to the pollution of surface water and groundwater consequently, leachate collection and treatment are essential before discharge into ...
M Tahmasbizadeh, Abdoliman Amouei, S Golbaz, M Farzadkia, M Kermani, Mitra Gholami, H Asgharnia   +6 more
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Molecular recognition of organic ammonium ions in solution using synthetic receptors

Beilstein Journal of Organic Chemistry, 2010
Ammonium ions are ubiquitous in chemistry and molecular biology. Considerable efforts have been undertaken to develop synthetic receptors for their selective molecular recognition.
Andreas Späth, Burkhard König
doaj   +1 more source