Results 41 to 50 of about 16,253 (181)

Analysis of Corrosion and Wall Perforation in the Heat Exchanger Made of AISI 316L Stainless Steel

Materials and Corrosion, EarlyView.
Elevated passivation temperature is identified as the dominant factor triggering localized corrosion and subsequent perforation of AISI 316L heat exchanger tubes. Electrochemical and complementary characterization results show that the alloy retains high resistance to general, pitting, and intergranular corrosion, indicating that failure primarily ...
Bojana Radojković, Bore Jegdić, Branimir Grgur, Stefan Dikić, Jovanka Pejić, Anđela Simović, Nataša Gajić, Aleksandra Popović   +7 more
wiley   +1 more source

Thermodynamic Studies on Phase Transitions of Potassium Thiocyanate and Ammonium Thiocyanate Crystals [PDF]

Bulletin of the Chemical Society of Japan, 1979
Abstract Heat capacities of KSCN and NH4SCN crystals were measured by adiabatic calorimetry in the temperature range between 13 K and the melting points. Molar volume of NH4SCN was also determined above room temperature. Entropy change for the II-I transition of KSCN (414.54 K, essentially higher order but accompanied with the first ...
Yoshio Kinsho, Natsuo Onodera, Minoru Sakiyama, Syûzô Seki   +3 more
openaire   +1 more source

The Employment of Hydrogen Peroxide in Water Disinfection Poses a Threat to Aquatic Ecosystems Because of Its Toxicity to Nontarget Organisms

Environmental Toxicology, EarlyView.
ABSTRACT Hydrogen peroxide is widely used in water and wastewater treatment, particularly in advanced oxidation processes that aid in the degradation of compounds and microbial disinfection. Despite concerns about potential environmental contamination, its impact on freshwater ecosystems remains inadequately studied.
Letícia Queiroz Almeida, Thayrine Dias Carlos, Leydiane Barbosa Bezerra, Rone S. Barbosa, Nelson Luís Gonçalves Dias Souza, Douglas Henrique Pereira, Renato Almeida Sarmento, Grasiele Soares Cavallini   +7 more
wiley   +1 more source

Chemical agents to control biofilm formation in step 1 of care—Toothpastes and mouthwashes/concepts and challenges

Periodontology 2000, EarlyView.
Abstract Maintaining optimal oral hygiene is important for overall oral care, ensuring the well‐being of teeth and their surrounding tissues. In addition, it promotes fresh breath and a pleasing smile. A key element of oral self‐care is the daily use of toothpaste during regular brushing.
Maud Joosstens, Cees Valkenburg, Fridus Van der Weijden   +2 more
wiley   +1 more source

Crystal structure of N,N′-[(ethane-1,2-diyl)bis(azanediylcarbonothioyl)]bis(benzamide)

Acta Crystallographica Section E: Crystallographic Communications, 2019
The reaction of benzoyl chloride and ethylendiamine in the presence of potassium thiocyanate yielded a white solid, C18H18N4O2S2, which consists of two benzoylthioureido moieties connected by an ethylene chain. The asymmetric unit consists of one half of
Issa Samb, Nango Gaye, Rokhaya Sylla-Gueye, Elhadj Ibrahima Thiam, Mohamed Gaye, Pascal Retailleau   +5 more
doaj   +1 more source

The use of isoxazoline and isoxazole scaffolding in the design of novel thiourea and amide liquid-crystalline compounds

Beilstein Journal of Organic Chemistry, 2020
A series of novel thiourea and amide liquid crystals containing 5-membered isoxazoline and isoxazole rings were synthetized and the liquid crystal properties studied.
Itamar L. Gonçalves, Rafaela R. da Rosa, Vera L. Eifler-Lima, Aloir A. Merlo   +3 more
doaj   +1 more source

One Stone Two Birds: Sustainable Perovskite Solar Cells Obtained by Using Water‐Based Recycled PbI2 and Guanidinium Thiocyanate Post‐Treatment

ChemSusChem, Volume 19, Issue 15, 14 August 2026.
A simple water‐based recycling and recrystallization method enables the recovery of high‐purity PbI2 from spent perovskite solar cells. With guanidinium thiocyanate treatment to restore film quality, PSCs fabricated using the recycled PbI2 achieve a PCE of 17.25%, comparable to those made from commercial high‐purity PbI2. This scalable, cost‐effective,
Pivini Gunasekara, Minh Tam Hoang, Saveen Senanayeke, Yang Yang, Prashant Sonar, Anthony P. O’Mullane, Hongxia Wang   +6 more
wiley   +1 more source

Single‐Atom Iron‐Catalyzed Oxidative Esterification: From Methylarenes to the Upcycling of Polystyrene and Lignin‐Derived Feedstocks

Angewandte Chemie, Volume 138, Issue 31, 27 July 2026.
Heterogeneous iron‐catalyzed environmentally benign and sustainable CH‐oxidative esterification methodology has been developed for the synthesis of esters. This challenging reaction has been achieved by the rational design of specific single atom iron‐based catalyst with Fe‐N4 active centers, which empowered the oxidative esterification of methyl and ...
Zhuang Ma, Binyu Zhang, Hui Yang, Yue Hu, Junzheng Yu, Yanbin Cui, Jun Zhao, Matthias Beller, Rajenahally V. Jagadeesh   +8 more
wiley   +2 more sources

Synthesis and Characterization of New Macrocyclic Polyether-Diester Ligands Containing A 4H-Pyran-4-One Subcyclic Unit [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 1999
New macrocyclic polyether-diester ligands (3-5) containing the 4H-pyran-4-one subcyclic unit have been prepared by treating various glycols with dimethyl chelidonate (10).
Aziz Shahrisa, Reza Tabrizi
doaj  

USES OF 4,5,6,7-TETRAHYDROBENZO[b]THIOPHENE IN THE SYNTHESIS OF PYRIDAZINE, PYRAZOLE, THIAZOLE AND PYRIMIDINE DERIVATIVES TOGETHER WITH THEIR CYTOTOXICITY [PDF]

Al-Azhar Journal of Pharmaceutical Sciences, 2014
The reaction of N-phenylbutanamide derivative 1 with bromine afforded compound 2 which it was directed to reacts with activated methylene groups, malononitrile (3a) and ethylcyanoacetae (3b) to produce compounds 4a and 4b respectively, on the other hand ...
Karam El-Sharkawy
doaj   +1 more source