112 research outputs found
Xorijiy tillarni oâqitishda didaktik oâyinlarning ahamiyati
Ushbu maqolada xorijiy tillarni oâqitishda didaktik oâyinlarning oârni hamda didaktik oâyinlarning taâlim sifatini oshirishdagi ahamiyati haqida muhokama qilinadi, tavsiyalar beriladi
Ikkilamchi polietilentereftalatning mexanik qayta ishlash retsikli
Hozirgi kunda ishlab chiqarishning, fan va texnikaning rivojlanishi atrof-muhitga koâplab turli chiqindilarning toâplanishiga sabab boâlmoqda. Yer aholisi soni oâtgan asrning boshidan to yangi asrning shu kunigacha bir necha barobar oâsdi. Bu esa oâz yoâlida ularni hayotiy zarur mahsulotlar bilan taâminlash uchun mamlakatlarda koâplab zavod-fabrikalarning qurilishiga, plastik chiqindilarning koâpayishiga olib keldi. Oqibatda tabiat ayovsiz ishlatildi va ishlatilmoqda va uning oâzi turli chiqindilar bilan toâlib toshmoqda. Ushbu maqolada polietilentereftalat chiqindilarini qayta ishlash usullari keltirilgan
KIBERXAVFSIZLIKDAN HIMOYALANISHDA IT (INFORMATION TECHNOLOGY) SOHASINI AHAMIYATI VA ZARURLIGI
Bugungi axborortlashuv asrida har bir sohadagi turli koârinishdagi xavf-xatarlarni hisobga olgan holda, ularni oldindan bartarf etishda muhim hisoblangan, âInformation technologyâ(axborotlashgan qurilmalar) vositalarini joriy etishdan iboratdir. Bugungi jamiyatda axborotlarni izlash, ularni qayta ishlash va tarqatish muhim sanalib, ularni ishonchliligi hamda toâliqligini taâminlash zarur hisoblanadi. Chunki, shu orqali kiberxavfsizlikni taâminlashimiz mumkin boâlad
CO2 reduction over Cu-ZnGaMO (M = Al, Zr) catalysts prepared by a sol-gel method: Unique performance for the RWGS reaction
Cu-ZnGaMO (M = Al, Zr) catalysts prepared by a surfactant-free sol-gel method were characterized and tested in the reverse water-gas shift (RWGS) reaction. Their catalytic behavior was analyzed under 0.1â3 MPa at 250â325 °C and using a reactant mixture of CO2/H2 = 1/3. The catalytic results are analyzed in the light of the characteristics of the catalysts. The Cu-ZnGaZrO catalysts were highly selective for the RWGS reaction; a major role of surface copper and interface oxygen vacancies is proposed. CO2 conversion and CO selectivity increased on increasing the reaction temperature. CO2 conversion reaches 16.8% with 99.7% selectivity for CO under 0.1 MPa at 325 °C over the Cu-ZnGaZrO1 catalyst. It is suggested that CO and methanol production proceed via independent reaction pathways
Ikkilamchi polietilentereftalatning mexanik qayta ishlash retsikli
Hozirgi kunda ishlab chiqarishning, fan va texnikaning rivojlanishi atrof-muhitga koâplab turli chiqindilarning toâplanishiga sabab boâlmoqda. Yer aholisi soni oâtgan asrning boshidan to yangi asrning shu kunigacha bir necha barobar oâsdi. Bu esa oâz yoâlida ularni hayotiy zarur mahsulotlar bilan taâminlash uchun mamlakatlarda koâplab zavod-fabrikalarning qurilishiga, plastik chiqindilarning koâpayishiga olib keldi. Oqibatda tabiat ayovsiz ishlatildi va ishlatilmoqda va uning oâzi turli chiqindilar bilan toâlib toshmoqda. Ushbu maqolada polietilentereftalat chiqindilarini qayta ishlash usullari keltirilgan
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