Химические науки список научных статей

Impact of the process of modification on graphite structure at the application of fluorine-containing oligomer chloroperfluorododecylfluoro sulfate has been studied. It was shown that during this process graphite structure doesn’t change. Only particles of chloroperfluorododecylfluoro sulfate are...

Ultratovush kuchini ko‘proq darajada oshirish GS fraktsiyasi tarkibidagi sholi poyasi biomassasidan va kamroq darajada lignin fraktsiyasi tarkibidagi aralashmalarni olib tashlashga yordam beradi

The microwave field influence on the physicochemical properties of collagen and gelatin was studied. It is shown that when microwave field acts on the studied protein samples, a change in the molecules structure formation occurs. It was experimentally established that microwave exposure leads to...

Ushbu maqolada polikondensatsiya reaktsiyasi orqali melamin, karboamid, formalin va tozalangan ammofos (MFKA) asosida sintez qilingan sorbent bo'yicha tadqiqot olib borildi. Olingan MFKA sorbenti bilan Cu(II) ioni bilan hosil qilgan metallokompleksing Raman spektrlari o'rganilgan va tahlil qilindi

Gossipol asosida olingan Shiff asoslari ayrim metallar bilan maxsus sharoitlarda o’ziga xos rangli birikmalar hosil qiladi. Gossipol birikmalarining ushbu xossalariga asoslanib ularni analitik kimyoda metall ionlarini aniqlashda reagent sifatida ishlatilishi mumkin. Ushbu maqolada Co3+ kationini...

This article focuses on enhancing the processes and equipment for producing humectants used in agriculture to improve soil moisture retention and crop yield. It explores advancements in the design and efficiency of production devices, including optimized chemical processes and environmentally...

В работе приведены результаты исследований по разработке технологии получения гранулированного суперфосфата путём двухстадийного разложения низкосортных фосфоритов Центральных Кызылкумов концентрированной серной кислотой в ангидритном режиме. Показана зависимость коэффициента разложения различных...

Ишда SiО2/ZnO-10%CoO+ПЭГ таркибли газсезгир материал асосида ишлаб чиқилган метанни аниқловчи яримўтказгичли сенсор ЯЎС-СН4 нинг ишлаш ресурси ва сигналининг селективлиги текширилган. Ўтказилган синовларда сенсор сигнали қисқа оралиғда ўзгарган ва бу ўзгариш натижасида юзага келган хато қиймати...

Mixed novolac-type oligomers are synthesized in the melt on the base of oxibenzene and its alkilsubstituted. The content of dioxibenzene changes in the range of 0,1 – 0,5 mol. The influence of temperature and duration of the reaction of initial components, transformation has been studied.

Glycidyl ethers of polycyclic bisphenols of norbornan type and their phenyl substituted derivatives were obtained and studied. They were solidified by diaminodiphenylsulphon and methyltetrahydrophthalic anhydride. The data of the termogravimetric analysis of the obtained polymers showed that they...

Aromatic polyesthers were synthesized on the base of policiclicbisphenols and dichloroanhydride of aromatic dicarboxylic acid by the method of equilibrium polycondensation in solvent. The obtained polymers are characterized by high heat-and thermal stability, are well soluble in chlorinated...

The effect of hardeners on the properties of cured epoxy polymers is studied. For the purpose of synthesis of polymers with increased thermal properties. Theglycide esters of polycyclic bisphenols synthesized by us were used as a diol component. Since the thermal and heat resistance of polymers, in ...

Малые пептиды (С-3-Б-бета) яда среднеазиатской кобры замедляют окисление суксината в митохондриях печени крыс. Снижение уровня окислительного фосфорилирования(V3) приводит к резкому снижению индекса дыхательного контроля и соотношения АДФ/Г. Этот пептид в первую очередь снижает активность...

Aromatic polyesthers were synthesized on the base of policiclicbisphenols and dichloroanhydride of aromatic dicarboxylic acid by the method of equilibrium polycondensation in solvent. The obtained polymers are characterized by high heat-and thermal stability, are well soluble in chlorinated...

Химия гетероциклических соединений постоянно привлекает внмание иследователей. Нeyклoннo вoзрaстaющee внимaниe к гетероциклическим соединениям стимyлирyeтся oбнaрyжeниeм y них рaзнooбрaзнoй биoлoгичeскoй aктивнoсти. Особый интерес представляет химия гетероциклических соединений, имеющих в системе...

Бұл мақалада мақсары майының құрамы, органолептикалық көрсеткіштері, физикалық-химиялық көрсеткіштерінің зерттеулері келтірілген. Өсімдік майларының сапасын сараптауды жүргізу тәртібі көрсетілген.

The composition of oil deposits in pipelines during oil pumping was investigated. In the experiments, they applied atomic adsorption, chromatography-mass spectrometry, gamma spectrometry. It was found that 20% of the deposits are paraffins, resins and heavy fractions of oil, and 80% are asphaltenes ...

The problem of cleaning waste water from oil and oil products is of great importance both for the protection of water resources from pollution and for the extraction of additional oil resources from oil-containing waters. The dependences of the radiation-chemical yield of heptane decomposition on...

Maqolada enterosorbent xususiyatga ega dorilarning zamonaviy nomenklaturasini mahalliy xom ashyolar hisobiga kengaytirish maqsadida O‘zbekistonda ro‘yhatdan o‘tgan va farmatsevtika bozorida mavjud preparatlarning tahliliy sharhini o‘tkazish natijalari keltirilgan. Olingan ma’lumotlar oshqozon-ichak ...

Has been discussed diffusion coefficients, the amount of the liquid particles sorbed by quantity, as well as the methods of determining molecular masses of polymers. We were researching liquid area’s kinetics of vapor sorption on the MCBean scale. We’ll also determine the molecular masses of...