Direct conversion of 2,4-dinitrophenylhydrazone of palmitaldehyde to its dimethyl acetal

Direct Conversion of 2,4-dinitrophenylhydrazone of Palmitaldehyde to Its Dimethyl Acetal.

on direct sums of baer modules

the notion of baer modules was defined recently

petrology and geochemistry of khar-bash (western shahrood) and its relation ship to iron mineralization

منطقه مورد مطالعه در 23 کیلومتری جنوب غرب شهرستاشاهرود قرار دارد که در نقشه 100000/1 شاهرود قرار گرفته است.ناحیه مورد مطالعه در تقسیمات ساختاری ایران بخشی از زون البرز شرقی است . در طی سنوزوئیک این زون به شدت تحت تأثیر فازهای کوهزایی آلپی قرار گرفته و فعالیت های آتشفشانی انوسن در قسمت های غربی آن دیده می شود . از نظر ترکیب سنگ شناسی منطقه مورد مطالعه متنوع و بیشتر شامل سنگ های رسوبی مانند : آ...

construction and validation of translation metacognitive strategy questionnaire and its application to translation quality

like any other learning activity, translation is a problem solving activity which involves executing parallel cognitive processes. the ability to think about these higher processes, plan, organize, monitor and evaluate the most influential executive cognitive processes is what flavell (1975) called “metacognition” which encompasses raising awareness of mental processes as well as using effectiv...

The Estenfication of Gibberellins with Dimethylformamide Dimethyl Acetal (DMFDMA)

The key step is to prepare rare gibberellins by converting the m ore readily available gibberellins (G A 3, G A 4, G A 7 and G A 13) into their m ethyl esters. The D M F D M A is em ployed as an esterifying reagent to avoid the diazom ethane due to its toxic, explosive and hazardous nature. It is observed that D M F D M A apart from esterification can also be used as acetylating and epim erizin...