The determination of metal ions such as Cu²⁺ and Zn²⁺ in various samples is crucial for environmental monitoring, industrial quality control, and biomedical applications. This study explores the quantitative analysis of Cu²⁺ and Zn²⁺ ions using UV/Vis spectrophotometry, a rapid and reliable technique based on the absorption of light by metal-ligand complexes. Optimal conditions for the detection, including wavelength selection, reagent concentration, and pH, were investigated to enhance sensitivity and accuracy. Calibration curves were constructed to determine the linearity and detection limits for each ion. The method was applied to real samples, and results were validated against standard techniques. The findings demonstrate that UV/Vis spectrophotometry provides a cost-effective and efficient approach for Cu²⁺ and Zn²⁺ determination in various matrices.

Ma'lumki, nikohga va yaqin qarindoshlikka asoslangan axloqiy mas'uliyat, o’zaro qurmat, tushunish va mehr-muhabbat umumiyligi bilan bog`langan kichik ijtimoiy guruh oila deyiladi. Oila boshqa turdagi kichik guruhlardan o’zining bir qator jihatlari bilan ajralib turadi: birinchidan, oila ko’p muddatga, ya'ni bir necha o’n yillar va ko’p yillarga mavjud bo’ladi; ikkinchidan, oilada shaxslararo munosabatlarning bir necha turlari amalga oshadi, ya'ni milliy mafkuramizga oid ilk tushunchalar avvalo oila muhitida singadi va bu jarayon bobolar o’giti, ota ibrati, ona mehri orqali amalga oshadi. Bunda oilaviy munosabatlarda tarbiyaviy, psixologik, xissiy, moliyaviy, jinsiy va boshqa vazifalarning amalga oshirilishi kuzatiladi;

Ushbu maqolada jinoiy ishlar bo‘yicha sud qarorlarining mulkiy undiruvi bilan bog‘liq masalalar atroflicha tahlil qilingan. Xususan, jinoyat ishlari bo‘yicha sud qarorlarini mulkiy undiruvga oid qismlarini ijro etishda xalqaro tajribani o‘rganish, mavjud samarali mexanizmlarni tahlil qilish va O‘zbekiston qonunchiligiga tatbiq etish imkoniyatlarini ko‘rib chiqishdan iborat.

Ushbu maqolada bachadon bo‘yni rak oldi kasalliklari (prekantsereoz holatlar) va ularni aniqlash usullari haqida batafsil ma’lumot beriladi. Patofiziologik o‘zgarishlar, diagnostik usullar, ularning samaradorligi hamda kasallik rivojlanish xavfini kamaytirish uchun olib boriladigan profilaktik tadbirlar tahlil qilinadi. Shuningdek, zamonaviy molekulyar va immunologik diagnostika usullari haqida ham so‘z yuritiladi.

Ushbu maqolada tabiiy fanlarni o‘qitishda 5 E modeli asosida darslarni tashkil etish, o‘quvchilarni darsga jalb qilish, qiziqtirish, mavjud bilimlarini tadqiq qilish, mavzuni turli xil usullar bilan tushuntirish, ko‘nikmalar asosida bilimni amaliyotga qo‘llash va olgan bilimlarini baholash to‘g‘risida ma’lumotlar berilgan.