R à G I F A S Z E R K E Z E T E K - Hidak és Szerkezetek Tanszéke
R à G I F A S Z E R K E Z E T E K - Hidak és Szerkezetek Tanszéke
R à G I F A S Z E R K E Z E T E K - Hidak és Szerkezetek Tanszéke
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Spiral thickening in the vertical fracheids of<br />
Douglas fir. Magnification x250 (Building<br />
Research establishment, © Crown Copyright)<br />
(a)<br />
Scanning electron micrograph of tyloses in a<br />
heartwood vessel of European oak.<br />
Magnification x600 (Building Research<br />
Establishment, © Crown Copyright)<br />
(b)<br />
Biológiai kártevők 3/4
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