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صفحه اصلی / 15 بهترین امتیاز داده شده 10
نمایش:
لیست ماهانه
تاریخ ایجاد
(0.12) 20220709-5649
(0.01) 20220710-5830
(0.01) 20200927-8888
(0.01) 20190330-1983
(0.01) 20190330-1981
(0.01) 20190330-1639
(0.01) The anatomist’s hand
January 23, 1896, marked the first time that Röntgen demonstrated his discovery in public. The audience applauded as the hand of well-known anatomist Albert von Kölliker (1817-1905) was scanned, and the X-ray image was reproduced and spread not long afterward. This allowed audiences outside the technical sphere to share in the thrill – and the chill – brought by the sudden transparency of the human body.
(0.00) 20220709-5737
(0.00) 20200930-8972
(0.00) Cardiac pacemaker
The fully implantable cardiac pacemaker from Elema-Schönander was made possible by two inventions in the 1940s: small batteries and energy-saving transistors. A simple plastic cup was used as the mold. The first versions were affected by hairline cracks in the molding material. The electrode cable was also not sufficiently fatigue-resistant to stand up to the heart’s approximately 100,000 beats per day.