Results 11 to 20 of about 1,056,484 (359)

ON THE OXYGEN ETHERS OF UREA. [PDF]

open access: greenJournal of the American Chemical Society, 1904
n ...
W. M. Bruce
openalex   +4 more sources

THE UREA DEARRANGEMENT [PDF]

open access: yesJournal of the American Chemical Society, 1922
n ...
Davis, Tenney L., Underwood, H. W.
openaire   +2 more sources

Aqueous Urea Solutions:  Structure, Energetics, and Urea Aggregation [PDF]

open access: yesThe Journal of Physical Chemistry B, 2007
Urea is ubiquitously used as a protein denaturant. To study the structure and energetics of aqueous urea solutions, we have carried out molecular dynamics simulations for a wide range of urea concentrations and temperatures. The hydrogen bonds between urea and water were found to be significantly weaker than those between water molecules, which drives ...
Stumpe, M., Grubmueller, H.
openaire   +5 more sources

Políticas de comunicação comparadas: comunicação e democracia na saúde em dois municípios em gestão plena

open access: yesRevista Eco-Pós, 2009
As ciências políticas e os estudos das democracias se referem frequentemente à liberdade de imprensa e à liberdade de expressão como variáveis a serem consideradas nos estudos das democracias contemporâneas, ou mesmo indicadores da existência de ...
Áurea Maria da Rocha Pitta
doaj   +1 more source

The Highly Regioselective Synthesis of Novel Imidazolidin-2-Ones via the Intramolecular Cyclization/Electrophilic Substitution of Urea Derivatives and the Evaluation of Their Anticancer Activity

open access: yesMolecules, 2021
A series of novel 4-(het)arylimidazoldin-2-ones were obtained by the acid-catalyzed reaction of (2,2-diethoxyethyl)ureas with aromatic and heterocyclic C-nucleophiles.
Almir S. Gazizov   +10 more
doaj   +1 more source

Relationships between Circulating Urea Concentrations and Endometrial Function in Postpartum Dairy Cows [PDF]

open access: yes, 2015
Both high and low circulating urea concentrations, a product of protein metabolism, are associated with decreased fertility in dairy cows through poorly defined mechanisms.
Bekana   +23 more
core   +3 more sources

Deliquescence in Urea and Methyl-ureas [PDF]

open access: yesNature, 1940
A COMMUNICATION in NATURE from E. A. Werner1 directed attention to the deliquescence of urea and to the paucity of data concerning the vapour pressures of saturated solutions of urea and its derivatives, apart from the few observations of Adam and Metz2, and Edgar and Swan3.
openaire   +2 more sources

Effects of Different Nitrogen Sources and Ratios to Carbon on Larval Development and Bioconversion Efficiency in Food Waste Treatment by Black Soldier Fly Larvae (Hermetia illucens)

open access: yesInsects, 2021
Biowaste treatment by black soldier fly larvae (BSFL, Hermetia illucens) has received global research interest and growing industrial application. Larvae farming conditions, such as temperature, pH, and moisture, have been critically examined.
Yan Lu   +10 more
doaj   +1 more source

Disease severity adversely affects delivery of dialysis in acute renal failure [PDF]

open access: yes, 2007
Background/Aims: Methods of intermittent hemodialysis (IHD) dose quantification in acute renal failure (ARF) are not well defined. This observational study was designed to evaluate the impact of disease activity on delivered single pool Kt/V-urea in ARF ...
American College of Chest Physicians/Society of Critical Care Medicine Consensus Conference   +20 more
core   +1 more source

SOME FEATURES OF SOCIAL COMMUNICATION PROCESS AT PREADOLESCENTS WITH MENTAL DEFICIENCIES [PDF]

open access: yesStudia Universitatis Babeş-Bolyai. Psychologia-Paedagogia, 2010
. During his entire life, a people have a lot of social relationships, based of the social communication process. The social communication is a form of total communication process and has specific manifestations related to ages, gender, social ...
UREA ROXANA
doaj  

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