Black, Green Tea May Slow Alzheimer's Disease Adapted from WebMD Medical News, Oct. 27, 2004 A study from England's University of Newcastle upon Tyne shows that green and black teas may inhibit certain brain enzymes linked to Alzheimer's disease. The study's findings may lead to new therapeutic developments for dementia and Alzheimer's disease, which is estimated to affect 10 million people
Bsr52 npn darlington transistorDISCRETE SEMICONDUCTORS
NPN Darlington transistor
Product data sheet
NPN Darlington transistor
• Industrial high gain amplification.
NPN Darlington transistor in a TO-92; SOT54 plastic Simplified outline (TO-92; SOT54) and symbol.
plastic single-ended leaded (through hole) package; 3 leads LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 60134).
Transistor mounted on an FR4 printed-circuit board.
thermal resistance from junction to ambient Transistor mounted on an FR4 printed-circuit board.
Tamb = 25 °C unless otherwise specified.
collector-emitter saturation voltage IC = 0.5 A; IB = 0.5 mA Switching times (between 10% and 90% levels); see
Fig.2 DC current gain; typical values.
Vi = 10 V; T = 200 μs; tp = 6 μs; tr = tf ≤ 3 ns.
R1 = 56 Ω; R2 = 10 kΩ; RB = 10 kΩ; RC = 18 Ω.
VBB = −1.8 V; VCC = 10.7 V.
Oscilloscope: input impedance Zi = 50 Ω.
Fig.3 Test circuit for switching times.
Plastic single-ended leaded (through hole) package; 3 leads
DIMENSIONS (mm are the original dimensions)
1. Terminal dimensions within this zone are uncontrolled to allow for flow of plastic and terminal irregularities.
DATA SHEET STATUS
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the device. Limiting values are stress ratings only and operation of the device at these or any other conditions General ⎯ Information in this document is believed to be
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Quick reference data ⎯ The Quick reference data is an
any of these products are for illustrative purposes only. extract of the product data given in the Limiting values and NXP Semiconductors makes no representation or Characteristics sections of this document, and as such is warranty that such applications will be suitable for the not complete, exhaustive or legally binding. specified use without further testing or modification.
Limiting values ⎯ Stress above one or more limiting
values (as defined in the Absolute Maximum Ratings
System of IEC 60134) may cause permanent damage to
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Herpes Pferdekrankheiten Die Infektionen mit Herpesviren treten weltweit bei Equiden auf und führen zu ansteckenden Erkrankungen. In Deutschland lässt sich aufgrund serologischer Untersuchungen sagen, dass 70-80% der Pferdepopulation bis zum Ende des dritten Lebensjahres mit diesem Virus Kontakt hatte. Das Virus wird vor al em mit Sekreten der Atemwege (Husten, Aerosol, Nasenausfluss) a