Results 11 to 20 of about 467,905 (267)

5-Vinyl-1H-tetrazole

Molbank, 2023
Highly purified 5-vinyl-1H-tetrazole was synthesized, which is in great demand in modern medicine and industry as a monomer for obtaining nitrogen-rich macromolecular compounds and a reagent for the complete synthesis of biological compounds.
Daria M. Krygina, Eugene V. Sivtsov, Yuliya N. Pavlyukova, Ekaterina N. Chernova, Mariya A. Skryl’nikova, Vadim A. Baigildin, Aleksandra M. Puzyk, Alexander A. Oskorbyn, Rostislav E. Trifonov, Pavel A. Aleshunin, Vladimir A. Ostrovskii   +10 more
doaj   +1 more source

Condensation of Benzyl Carbamate with Glyoxal in Polar Protic and Aprotic Solvents

Molecules, 2023
The synthesis of substituted 2,4,6,8,10,12-hexaazaisowurtzitane via direct condensation is challenging. The selection of starting ammonia derivatives is very limited.
Artyom E. Paromov
doaj   +1 more source

Novel 1,2,4-Triazole- and Tetrazole-Containing 4H-Thiopyrano[2,3-b]quinolines: Synthesis Based on the Thio-Michael/aza-Morita–Baylis–Hillman Tandem Reaction and Investigation of Antiviral Activity

Molecules, 2023
A novel method for synthesizing 1,2,4-triazole- and tetrazole-containing 4H-thiopyrano[2,3-b]quinolines using a new combination of the thio-Michael and aza-Morita–Baylis–Hillman reactions was developed.
Andrey V. Khramchikhin, Mariya A. Skryl’nikova, Maxim A. Gureev, Vladimir V. Zarubaev, Iana L. Esaulkova, Polina A. Ilyina, Oussama Abdelhamid Mammeri, Dar’ya V. Spiridonova, Yuri B. Porozov, Vladimir A. Ostrovskii   +9 more
doaj   +1 more source

1,4,6,10-Tetraazaadamantanes (TAADs) with N-amino groups: synthesis and formation of boron chelates and host–guest complexes

Beilstein Journal of Organic Chemistry, 2022
A synthetic route to 1,4,6,10-tetraazaadamantanes (TAADs) bearing free and protected amino groups at the bridge N-atoms has been developed via intramolecular cyclotrimerization of C=N units in the corresponding tris(hydrazonoalkyl)amines.
Artem N. Semakin, Ivan S. Golovanov, Yulia V. Nelyubina, Alexey Yu. Sukhorukov   +3 more
doaj   +1 more source

Gill and haematological alterations in Macrobrachium amazonicum adults in acute exposure to ammonia and nitrite isolated and combined

Aquaculture, Fish and Fisheries, 2022
The present study evaluated the isolated and combined effect of total ammonia and nitrite on Macrobrachium amazonicum adults through the median lethal concentration (LC5096h), histological analysis of gills and total and differential haemolymph cell ...
Fabrício Martins Dutra, Jonatan Raphael Juvenal, Sandra Carla Forneck, Claudia Caramelo Brazão, Eduardo Luis Cupertino Ballester   +4 more
doaj   +1 more source

Supplementation of grazing heifers with different protein sources

Revista Mvz Cordoba, 2021
Objective. Evaluate the effects of supplementation with different protein sources (soybean meal and wheat bran with urea) on the productive performance, intake, digestibility, microbial protein synthesis, and metabolic profile of grazing beef heifers ...
Román Enrique Maza-Ortega, Deilen Paff Sotelo-Moreno, Mauricio Miguel-Estrada, Libardo Alfonso Maza-Angulo, Mário Fonseca-Paulino   +4 more
doaj   +1 more source

ON THE MERCURY NITROGEN COMPOUNDS [PDF]

Journal of the American Chemical Society, 1907
n ...
openaire   +1 more source

SPECIFIC FEATURES OF NITROGEN METABOLISM DURING FERMENTATION OF MUST FROM WHITE GRAPE VARIETIES GROWN IN THE ODESSA REGION

Harčova Nauka ì Tehnologìâ, 2020
For wine quality management, nitrogen metabolism should be considered as a key process in the system “grape – wine.” Nitrogen is one of the dominant elements a grapevine receives from the soil.
O. Tkachenko, O. Kananykhina, T. Suhachenko, T. Turpurova, O. Titlova   +4 more
doaj   +1 more source

Groundwater chemistry, pollution, and health risk assessment for nitrogen compounds. A case study in a suburban region of Romania

Romanian Journal of Ecology & Environmental Chemistry, 2022
As groundwater is used as a source of drinking water, monitoring its quality is essential due to possible adverse effects on human health. Nitrogen compounds (nitrates, nitrites, ammonia) within certain concentration limits are natural components of the ...
Nicoleta Vasilache, Luisa Roxana Mandoc, Elena Diacu, Gabriela Geanina Vasile, Anda Gabriela Tenea, Alexandru Arcide, Gheorghe Batrinescu, Iuliana Paun, Stefania Gheorghe   +8 more
doaj   +1 more source

Comparative analysis of nitrogen compounds pollution in controlled and free drainage water

Mokslas: Lietuvos Ateitis, 2022
Agricultural drainage and associated water management systems are designed to eliminate to an acceptable level the factors associated with excess water that limit crop growth.
Rasa Stankevičienė
doaj   +1 more source