Results 11 to 20 of about 1,016,429 (298)

Enhancing Soil Nitrogen Availability and Rice Growth by Using Urea Fertilizer Amended with Rice Straw Biochar

open access: yesAgronomy, 2021
Urea fertilizer as a nitrogen source is used widely and globally. However, N loss through ammonia volatilization from applied urea has become a major drawback to agriculture. A pot experiment was conducted to determine the effect of rice straw biochar on
Gunavathy Selvarajh, Huck Ywih Ch’ng
doaj   +1 more source

The electrophoresis of transferrins in urea/polyacrylamide gels [PDF]

open access: yes, 1980
The denaturation of transferrin by urea has been studied by (a) electrophoresis in polyacrylamide gels incorporating a urea gradient, (b) measurements of the loss in iron-binding capacity and (c) u.v. difference spectrometry. In human serum transferrin
Evans, RW, Williams, J
core   +2 more sources

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

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

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

Why “Urea Nitrogen” When Urea is Measured? [PDF]

open access: yesClinical Chemistry, 1998
The paper by Morishita et al. (1) regarding the analysis of urea is confusing. In the text, the authors state that they are measuring urea nitrogen (UN), and it may seem so, because their …
openaire   +2 more sources

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  

Barriers to drug adherence in the treatment of urea cycle disorders: Assessment of patient, caregiver and provider perspectives

open access: yesMolecular Genetics and Metabolism Reports, 2016
Patients and families living with metabolic disorders face challenging dietary and drug treatment regimens. On the hypothesis that poor palatability, volume and frequency of drug/formula administration contribute to treatment non-adherence and ...
Oleg A. Shchelochkov   +5 more
doaj   +1 more source

Effect of Incorporation Techniques and Soil Properties on NH3 and N2O Emissions after Urea Application

open access: yesAgronomy, 2023
Ammonia (NH3) emissions affect the environment, the climate, and human health and originate mainly from agricultural sources like urea fertilizers. Such losses from urea fertilizer can be avoided by different application techniques like incorporation ...
Hannah Götze   +3 more
doaj   +1 more source

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