This article explores the complex pathophysiology of autoimmune diseases with a primary focus on the mechanisms underlying the breakdown of immune tolerance. Immune tolerance is essential for preventing the immune system from attacking the body’s own tissues. The review covers both central and peripheral tolerance processes, highlighting how genetic predispositions, environmental factors, and immune regulatory failures contribute to the development of autoimmunity. Key cellular players, such as regulatory T cells and antigen-presenting cells, are discussed in relation to their roles in maintaining immune homeostasis. Additionally, the article examines current understanding of molecular mimicry, epitope spreading, and other pathogenic mechanisms leading to self-reactivity. The challenges in diagnosis and treatment of autoimmune diseases are also addressed, emphasizing the need for targeted therapeutic approaches aimed at restoring immune tolerance rather than merely suppressing immune responses.

Hozirgi vaqtda polimer chiqindilar ko’payib atrof muhitga katta zarar keltiryapti. Shuning uchun ularni kamaytirish ularning o’rniga tabiiy polimerlar olish dolzarb hisoblanadi. Bunday tabiiy polimerlar turli xil agressiv muhitda parchalanib ketadi. Bunday bioparchalanuvchi polimerlar an’anaviy polimerlarga qaraganda ancha qimmatroqdir. Arzonroq bioparchalanuvchi polimerlar olish uchun polimer kompozitlardan foydalanish bilan bog’liq bo’ladi.

Agar kishi biror bir og‘ir ishni bajarayotgan bo‘lsa, u birmuncha vaqtdan so‘ng bu ishni bajarish tobora qiynlashib borayotganini sezadi. Chetdan qaraganda bu kishining holati ancha o‘zgarganligini ko‘rish mumkin. Bu o‘zgarishni mimika muskullari kuchlanishida, ter paydo bo‘lishida kurish mumkin.ayni vaqtda uning organizmida bimruncha jiddiy fiziologik o‘zgarishlar ham ro‘y beradi. Qiyinchiliklar ko‘payib borishiga karamsdan, kishi iroda kuchi hisobiga dastlabki ish shiddati birmuncha vaqt saqlab turishi mumkin.

This article discusses the issues of managing energy sources in modern communication systems through adaptive control models to improve energy efficiency. The possibility of evaluating the energy supply state in real-time, considering the variability of the load and external factors, and developing optimal control strategies is analyzed.

Ushbu maqolada XIX asr oxiri va XX asr boshlarida O‘rta Osiyoda yuzaga kelgan jadidchilik harakatining mazmun-mohiyati, tarixiy bosqichlari, asosiy g‘oyalari hamda bugungi kunda bu harakat merosining O‘zbekiston jamiyatidagi ahamiyati tahlil qilinadi. Jadidchilik harakatining asoschilari tomonidan ilgari surilgan ma’rifiy, ijtimoiy va siyosiy g‘oyalarning zamonaviy ta’lim tizimi, gender tengligi, milliy o‘zlikni anglash va fuqarolik jamiyati qurilishiga ta’siri yoritilgan. Shuningdek, jadid matbuoti, teatr va adabiy merosining yosh avlod tarbiyasidagi roli, bugungi islohotlar bilan o‘zaro bog‘liqligi chuqur o‘rganilgan. Maqolada tarixiy va zamonaviy qarashlar uyg‘unligi orqali jadidchilik harakatining dolzarbligi va bugungi kundagi o‘rni ilmiy asosda tahlil etiladi.