REVIEW OF SIMPLE MYOPIA AND TIMIR

Corticosteroids are medicines that are similar to the natural hormone cortisone and belong to the family of drugs called steroids.

Oral cancer is the sixth most common malignancy with almost 500000 new cases reported worldwide annually. The diagnosis of oral cancer at an early stage has a good prognosis as the survival rate is high (around 80%). However, the majority of oral cancer cases are diagnosed at a later stage with a considerably poor 5-year survival rate of 50% according to World Health Organization statistics. Thus, an effective management strategy for oral cancer will depend on its early identification and intervention which would pave the way for superior prognosi

भारत एक कृषि प्रधान देश है जहाँ की लगभग 70 प्रतिषत जनता कृषि कार्य करती है। बढ़ती हुई जनसंख्या तथा भूमि की उत्पादन दर कम होने के कारण कभी-कभी भोजन की पूर्ति की समस्या गंभीर रूप धारण कर लेती है। भारत में खाद्य पदार्थों का कम उत्पादन होने का दूसरा कारण यह भी है कि यहाँ अधिकतर लोगों की काम करने की क्षमता कम है क्योंकि वे असंतुलित एवं कम पोषण आहार के ऊपर निर्भर रहते हैं अतः स्वास्थय ठीक न रहने से उनकी कार्य करने की क्षमता भी कम होती है। इस प्रकार स्वस्थ्य जीवन के लिए सन्तुलित एवं पोषक आहार जरूरी है।

A better device is the triac, bidirectional thyristor, which allows the full a.c. power to be controlled. It comprises two thyristors connected in parallel and working in opposition but controlled by the same gate. The trigger pulses to a triac are provided by a special device called diac, bidirectional breakdown diode. It is, in effect, two Zener diodes connected back to back. The diac conducts in either direction if the applied voltage reaches the breakdown voltage of about 30 V. This