Results 21 to 30 of about 12,057 (197)

Theoretical Evaluation of Ultrasonic Velocities in Ternary Liquid Mixtures of Dibutylether + Toluene + 1-Alkanols at 303K

E-Journal of Chemistry, 2011
A comparison of ultrasonic velocity evaluated from Nomoto’s relation, Van Deal-Vangeel ideal mixtures relation, impedance dependence relation and collision factor theories with experimental values have been made in three ternary systems of 1-alkanol with
T. Sumathi, K. Abeetha
doaj   +1 more source

Factors associated with the development of dental defects acquired in the extrauterine environment [PDF]

Brazilian Oral Research, 2019
This study aimed to analyze the association of sociodemographic, child health, healthcare service, and access indicators with developmental defects of enamel (DDE) acquired outside the uterus, based on gestational factors.
Judith Rafaelle Oliveira PINHO, Erika Barbara Abreu Fonseca THOMAZ, Cecília Cláudia Costa RIBEIRO, Cláudia Maria Coelho ALVES, Antônio Augusto Moura da SILVA   +4 more
doaj   +1 more source

Enantioselective Synthesis of a New Class of Stable and Functionalized Cyclopentadienes via CuH‐Catalysis

Angewandte Chemie, EarlyView.
Cyclopentadienes (CpHs) are fundamental building blocks with widespread applications in chemistry. However, their inherent acidity and isomeric instability have long limited access to chiral variants in an asymmetric fashion. Here, we introduce a CuH‐catalyzed asymmetric transformation that provides an unprecedented entry into a new class of ...
Piero Soppelsa, Riccardo Bellin, Besma Boulila, Francesco Vaghi, Manuel Orlandi   +4 more
wiley   +2 more sources

Evaluation and application of phytomass derived activated carbons as electrodes for coin cell supercapacitors

International Journal of Electrochemical Science, 2021
We report for the first time, a novel yet low-cost activated carbon (AC) derived from the leaves of Asian taro-AT and Indian shot-IS by conc. H2SO4 activation, followed by processing at 800°C under N2 flow for the possible application as electrodes in ...
T.R. Banuprabha, A. Karthikeyani, P. Kalyani   +2 more
doaj   +1 more source

Removal of Grey BL from Dye Wastewater by Derris (Pongamia Glabra) Leaf Powder by Adsorption

E-Journal of Chemistry, 2010
The dye, Grey BL was adsorbed on an adsorbent prepared from mature leaves of the Pungan tree (Pongamia glabra). A batch adsorption study was carried out with variable adsorbate concentration, adsorbent amount and pH. Ninety three percent of the dye could
T. Mugugan, A. Ganapathi, R. Valliappan
doaj   +1 more source

An Efficient and Convenient Approach to Synthesis of Tetrahydrobenzo[b]pyran Derivatives Using Tetrabutylammonium Bromide as Catalyst

E-Journal of Chemistry, 2009
An efficient and convenient approach to the synthesis of 2-amino-3-cyano-4-aryl-7,7-dimethyl-5-oxo-4H-5, 6, 7, 8- tetrahydro benzo[b]pyran derivatives using tetrabutylammonium bromide (TBABr) as the catalyst is described.
S. Gurumurthi, V. Sundari, R. Valliappan
doaj   +1 more source

Organochlorine pesticides and polychlorinated biphenyls in carnivorous waterbird and fish species from Lake Hawassa, Ethiopia

SN Applied Sciences, 2022
Abstract Agricultural, vector-control and industrial activities around Lake Hawassa pose a risk of organochlorine contamination of the lake biota.
Shiferaw Ayele, Yosef Mamo, Ermias Deribe, Ole Martin Eklo   +3 more
doaj   +1 more source

Developmental enamel defects and their relationship with caries in adolescents aged 18 years

Scientific Reports, 2023
Randomly selected 1,611 individuals aged 18 years formed a nationally representative sample from all provinces of Poland. Developmental defects of the enamel (DDE) and caries were assessed using the modified DDE index, molar incisor hypomineralisation ...
Dorota Olczak-Kowalczyk, Norbert Krämer, Dariusz Gozdowski, Anna Turska-Szybka   +3 more
doaj   +1 more source

The associations between p,p’-DDE levels and plasma levels of lipoproteins and their subclasses in an elderly population determined by analysis of lipoprotein content

Lipids in Health and Disease, 2020
Background Lipoproteins at aberrant levels are known to play a role in cardiovascular disease. The metabolite of the insecticide dichlorodiphenyltrichloroethane (DDT), p,p’-dichlorodiphenyldichloroethylene (p,p’-DDE), physically associates with lipids ...
Juliann Jugan, P. Monica Lind, Samira Salihovic, Jordan Stubleski, Anna Kärrman, Lars Lind, Michele A. La Merrill   +6 more
doaj   +1 more source

Developmental defects of enamel in children born preterm

Frontiers in Pediatrics, 2022
IntroductionTo investigate manifestations of developmental defects of enamel (DDE) in children born preterm (PT), and to explore possible neonatal morbidities related to DDE manifestation and severity.MethodsA cohort study of 52 children born before ...
Elinor Halperson, Salome Shafir, Avia Fux-Noy, Diana Ram, Smadar Eventov-Friedman   +4 more
doaj   +1 more source