In this work, electrochemical methods such as Tafel polarization and electrochemical impedance spectroscopy (EIS) were used to study the inhibition efficiency of Nettle leaves hydroalcoholic extract as a green corrosion inhibitor of API 5L carbon steel in 0.5 M H2SO4 solution. The results showed that the inhibition efficiency was increased with increasing the concentration of the extract and th...

It has been reported that provocation test with the use of inhalant allergens is the most reliable method for confirming the causal allergens in bronchial asthmat ·5l. However, reports on the studies on the significance of molds in childhood bronchial asthma using the inhalation provocation test are few even in Europe and America. Since 1964, the authors have been conduct­ ing skin tests and in...

Pyrano[2,3-c]carbazoles which are biologically valuable and synthetically challenging frameworks are synthesized in high yields over five steps from commercially available resorcinol. Palladium-catalyzed arylation remains a key step in this novel strategy. The versatility of this protocol has been demonstrated by the synthesis of naturally occurring alkaloid clauraila C and 7-methoxyglycomaurin...

A new series of 4-(2'-Oxo/thiobarbiturinyl)-2-(substitutedphenyl)-3-[(substituted aminomethylene)]-2,3-dihydro-1,5-benzothiazepines (5a-5l) and 4-(2'-oxo/thiobarbiturinyl)-2(substituted-phenyl)-3-(substitutedaminomethylene)]-2,3-dihydro-1, 5benzoxazepines (6a-6l) were synthesized. All the newly synthesized compounds were screened in vivo, for their acute toxicity and anticonvulsant activity in ...

Two multituberculate molars from the Kimmeridgian of the Langenberg Quarry near Goslar (Lower Saxony, Germany) represent the first Jurassic mammals from Germany. An upper M1 with cusp formula 5L/4B is characterized by strongly ornamented enamel and is assigned to Teutonodon langenbergensis gen. et sp. n. within the plagiaulacid line. A second specimen preserving two large and one small cusp is ...

Introduction Historically, IBM has made performance the focus of its microelectronics technology strategy. For the wires and insulators used in the back-end-of-the-line (BEOL), this drove the use of damascene tungsten chemical-mechanical polish (CMP) local interconnects and vias, SiO2-based intermetal dielectric CMP planarization, high-aspect ratio aluminum wiring, high-density plasma SiO2 depo...

Technical Sessions (8 am Noon) 5A Aerospace – Coronado A 5BWear III – Coronado B 5C Condition Monitoring III – Mini Course and Papers: XRF for Lubrication Analysis – Coronado C 5D Seals I – Coronado D 5E Tribotesting – Coronado E 5F Lubrication Fundamentals V – Coronado F/G 5GMetalworking III – Fiesta 3/4 5H Commercial Marketing Forum V – Fiesta 5 5I Rolling Element Bearings I – Yucatan 1 5J No...