Results 51 to 60 of about 878 (177)

Influence of Material Viscosity on the Properties of Extruded High‐Consistency Silicone Rubber Foam Profiles

open access: yesAdvances in Materials Science and Engineering, Volume 2026, Issue 1, 2026.
High‐consistency silicone rubbers can be foamed with various chemical and physical blowing agents. However, due to the toxic and, therewith, harmful effects of chemical blowing agents, physical blowing agents are becoming increasingly important. In this thesis, the influence of the viscosity adjusted via the silica content of different high‐consistency
Timo Hofmann   +3 more
wiley   +1 more source

Convulsant Effects of Semicarbazide in Epileptic Monkeys.

open access: yesExperimental Biology and Medicine, 1956
Summary(1) Threshold convulsant dosages to rapid intravenous injection of semicarbazide were significantly lower in chronically epileptic monkeys than in normal unoperated controls. (2) Clinical seizures following intravenous injection of threshold convulsant doses of semicarbazide occurred after a latent period of 2 to 3 1/2 hours. With suprathreshold
L M, KOPELOFF, J G, CHUSID, N, KOPELOFF
openaire   +2 more sources

Screening of Chemical Residues and Antimicrobial Resistance in Dehydrated Chicken Feet Intended as Dog Treats: A Pilot Study

open access: yesVeterinary Medicine International, Volume 2026, Issue 1, 2026.
The pet population is steadily increasing worldwide, and treats, which account for approximately 15% of the pet food market, are the fastest‐growing segment of the pet food industry. However, the widespread use of antimicrobials in poultry farms may pose a direct risk to pets’ health, leading to the emergence of antimicrobial resistance.
Carlotta Marini   +13 more
wiley   +1 more source

Enhancing Open‐Circuit Voltage and Fill Factor in Sn‐Based Perovskite Solar Cells: Challenges and Opportunities for Sustainable Photovoltaics

open access: yesSusMat, Volume 5, Issue 6, December 2025.
This review summarizes advances in tin (Sn)‐based perovskite solar cells, a promising lead‐free alternative. It examines the main causes of Voc and fill factor losses, including Sn2+ oxidation, undercoordinated sites, and deep‐level traps. Strategies such as molecular coordination, surface passivation, compositional tuning, interface engineering, and ...
Padmini Pandey   +4 more
wiley   +1 more source

STUDY OF THE REACTION BETWEEN CARBAMOYL AZIDE OF α-N-PROTECTED AMINO ACIDS AND HYDRAZINE MONOHYDRATE

open access: yes, 2011
Two simple and efficient synthetic methods for the preparation of semicarbazide amino acid derivatives are reported. The procedures involve reaction between the carbamoyl azides of alpha-N-protected amino acids and hydrazine monohydrate: 4 ...
ESPOSITO, Gennaro   +3 more
core   +1 more source

Síntese de novos derivados de 1-(7-cloro-4-quinolinil) tiossemicarbazidas e semicarbazidas como potencias agentes antibacterianos e antiparasitários [PDF]

open access: yes, 2011
This work, entitled “Synthesis of novel derivatives of 1-(7-chloro-4-quinolinyl) thiosemicarbazides and semicarbazides as potencial antibacterial and antiparasitic agents” describes the synthesis of new derivatives of 1-(7-chloro-4-quinolinyl ...
Machado, Rafael Carvalhaes
core  

Carbonic Anhydrase Inhibitors: Design, Synthesis, and Biological Evaluation of Novel Sulfonyl Semicarbazide Derivatives

open access: yes, 2016
A series of novel sulfonyl semicarbazides 5–13 was designed, synthesized, and evaluated for human carbonic anhydrase (hCA) inhibition. The new sulfonyl semicarbazides were tested against a panel of hCA isoforms I, II, IX, and XII, using acetazolamide ...
Prashant S. Kharkar (1780549)   +4 more
core   +1 more source

Novel 1-acyl-4-substituted semicarbazide derivatives of primaquine - synthesis, cytostatic, antiviral and antioxidative studies

open access: yes, 2013
A series of novel 1,4-substituted semicarbazides 5a-g with a primaquine moiety bridged by a carbonyl group at position 1 and a cycloalkyl, aryl, benzyloxy or hydroxy substituent at position 4 were prepared and biologically evaluated.
Kralj, Marijeta   +8 more
core   +1 more source

Benzotriazole as a Synthetic Auxiliary [PDF]

open access: yes, 2012
Benzotriazole is a very useful synthetic auxiliary with versatile applications in organic chemis¬try. We have used benzotriazole in the synthesis of various heterocyclic compounds (benzoxazine, quinazoline, triazinetrione, hydantoin, oxadiazine and ...
Butula, Ivan   +5 more
core   +1 more source

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