You are here

Dzeņi palīdzēs izvairīties no galvas traumām

ad

dzenis

Lidotspēja, peldētspēja, aerodinamiskās īpašības, arī gravitācijas likums - to visu cilvēks ir apguvis, nonākot saskarsmē ar dabu. Un, lai arī ir jau 21. gadsimts un pasaulē valda tehnoloģijas, aizvien ir jomas, kurās varam mācīties no dzīvās radības.

Zinātnieki atklājuši jaunu evolūcijas mehānismu.

Ķīniešu pētnieks Jubo Fans no Beihangas universitātes Pekinā un Mings Žangs no Honkongas Politehniskās universitātes savas zināšanas un apņēmību likuši lietā, lai pētītu dzeņus un nākotnē palīdzētu izstrādāt sistēmas, kas, piemēram, motobraucējus un sportistus pasargātu no smagām galvas traumām.

Dzenis spēj ilgi un ar lielu spēku kalt koka stumbru, taču negūst pat ne mazākos smadzeņu bojājumus. Lai noskaidrotu, kā tas iespējams, pētnieki izmantojuši divas ātrdarbīgas videokameras, ar ko iemūžinātas dzeņa kustības, sēžot uz koka stumbra, un skenerus nolūkā uzzināt putna galvaskausa īpatnības - kaulu tilpumu, blīvumu un biezumu.

Pētniecības gaitā atklājušies interesanti fakti par dzeņa galvaskausu un knābi, proti, izrādās, ka galvaskauss vietām ir poraināks, savukārt knābja apakšējā un augšējā daļa nav vienādā garumā. Šie faktori tad arī esot daļa no evolūcijas laikā izveidojušās amortizācijas sistēmas, kas dzenim ļauj mežā "strādāt", nenodarot sev ļaunumu.

Materiāls no tvnet.lv

Komentāri

alkohol pergi berjalan-jalan. Untuk Dasha dan Maxim,ini ke 13
http://www.besibaja.id/pabrik-astm-a283-c.html pabrik astm a283 c
http://www.besibaja.id/pabrik-pipa-boiler.html pabrik pipa boiler
http://www.besibaja.id/pabrik-plat-abrex-400.html pabrik plat abrex 400
http://www.besibaja.id/pabrik-plat-asme516-grade70.html pabrik plat asme516 grade70
http://www.besibaja.id/pabrik-plat-astm516-70.html pabrik plat astm516 70
http://www.besibaja.id/pabrik-plat-boiler.html pabrik plat boiler
http://www.besibaja.id/pabrik-plat-hb-400.html pabrik plat hb 400
http://www.besibaja.id/pabrik-plat-high-tensile-sm490-yb.html pabrik plat high tensile sm490 yb
http://www.besibaja.id/pabrik-plat-high-tensile-sm490ya.html pabrik plat high tensile sm490ya
http://www.besibaja.id/pabrik-plat-kapal.html pabrik plat kapal
http://pabrikbesiwfjakarta.blogspot.com/ Distributor besi Wf Baja
https://goo.gl/XZ6zpY undangan pernikahan bahasa inggris islam
http://www.sentrabesibaja.com/besi-baja-hbeam-profil/ Distributor Besi H beam
http://ironsteelcenter.com/besi-baja-behel-beton-polos-ulir-sni-is-psi-m... Toko Besi Beton
http://www.gudangbesibaja.com/harga-pipa-besi-hitam-galvaniz-medium-baja... Supplier pipa besi
http://www.pusatbesibaja.co.id/harga-wiremesh-besi-produsen-supplier-age... Toko Wiremesh Besi
http://www.pusatbesibaja.com/harga-wiremesh-besi-distributor-toko-pabrik... Toko Wiremesh Besi
http://ironsteelcenter.com/category/besi-wiremesh-wermesh-m4-m5-m6-m7-m8... Pabrik wiremesh
http://www.gudangbesibaja.com/tag/bondek/ Distributor bondek
https://goo.gl/XZ6zpY undangan pernikahan amplop surat
http://www.sentrabesibaja.com/besi-beton-ulir-polos-sni/ Distributor Besi Beton
http://ironsteelcenter.com/besi-baja-behel-beton-polos-ulir-sni-is-psi-m... Jual Besi Beton
http://www.gudangbesibaja.com/harga-pipa-besi-hitam-galvaniz-medium-baja... Toko pipa besi
http://www.jualbesibetonhargapabrikmurah.com/category/besi-beton-sni-uli... Jual besi beton Sni Ulir Polos polos ulir
http://www.pusatbesibaja.co.id/harga-wiremesh-besi-produsen-supplier-age... Agen Wiremesh Besi
http://www.pusatbesibaja.com/harga-wiremesh-besi-distributor-toko-pabrik... Agen Wiremesh Besi
http://ironsteelcenter.com/category/besi-unp-channel-kanal-u-master-kaya... Pabrik besi unp
http://www.gudangbesibaja.com/category/besi-wiremesh/ Distributor wiremesh
http://www.undangancinta.com undangan pernikahan unik dan murah
http://www.sentrabesibaja.com/ www.sentrabesibaja.com
http://ironsteelcenter.com/besi-baja-behel-beton-polos-ulir-sni-is-psi-m... Harga Besi Beton
http://www.gudangbesibaja.com/harga-pipa-besi-hitam-galvaniz-medium-baja... Agen pipa besi
http://www.jualbesibetonhargapabrikmurah.com/category/besi-beton-sii-uli... Jual besi beton sii
http://www.pusatbesibaja.co.id/harga-wiremesh-besi-produsen-supplier-age... Pabrik Wiremesh Besi
http://www.pusatbesibaja.com/harga-wiremesh-besi-distributor-toko-pabrik... Pabrik Wiremesh Besi
http://ironsteelcenter.com/category/besi-baja-cnp-kanalc-channel-full-sn... Pabrik besi cnp
http://www.gudangbesibaja.com/category/besi-pipa-baja/ Distributor pipa besi baja sch 40 sch 80
https://goo.gl/XZ6zpY undangan pernikahan elegan
http://www.sentrabesibaja.com/welded-beam-castellated-beam-queen-king-cr... Jual Welded Beam T beam King Queen Cross Castellated Beam
http://ironsteelcenter.com/besi-baja-behel-beton-polos-ulir-sni-is-psi-m... Pabrik Besi Beton
http://www.gudangbesibaja.com/harga-pipa-besi-hitam-galvaniz-medium-baja... Pabrik pipa besi
http://www.jualbesibetonhargapabrikmurah.com/category/besi-beton-psi-uli... Jual besi beton psi Ulir Polos
http://www.pusatbesibaja.co.id/harga-atap-spandek-jual-pabrik-toko-suppl... Distributor Atap Spandek
http://www.pusatbesibaja.com/harga-atap-spandek-agen-toko-pabrik-produse... Distributor Atap Spandek
http://ironsteelcenter.com/category/besi-hollow-hitam-galvaniz Pabrik besi hollow
http://www.gudangbesibaja.com/category/besi-hollow/ Distributor besi hollow
http://www.undangancinta.com undangan pernikahan animasi
http://www.sentrabesibaja.com/bondek-cor-sni/ Jual Bondek Cor
http://ironsteelcenter.com/besi-baja-wf-iwf-wide-flange-beam-ss400-a36/h... Distributor Besi Wf Baja
http://www.gudangbesibaja.com/harga-pipa-sch-40-schedule-pabrik-distribu... Distributor sch 40
http://www.jualbesibetonhargapabrikmurah.com/category/besi-beton-perwira... Jual besi beton perwira
http://www.pusatbesibaja.co.id/harga-atap-spandek-jual-pabrik-toko-suppl... Harga Atap Spandek
http://www.pusatbesibaja.com/harga-atap-spandek-agen-toko-pabrik-produse... Harga Atap Spandek
http://ironsteelcenter.com/category/besi-baja-behel-beton-polos-ulir-sni... Pabrik besi beton Sni Ulir Polos
http://www.gudangbesibaja.com/category/besi-beton/ Distributor besi beton Sni Ulir Polos
http://www.undangancinta.com undangan pernikahan lucu
http://www.sentrabesibaja.com/atap-spandek/ Jual Atap Spandek Sni
http://ironsteelcenter.com/besi-baja-wf-iwf-wide-flange-beam-ss400-a36/h... Supplier Besi Wf Baja
http://www.gudangbesibaja.com/harga-pipa-sch-40-schedule-pabrik-distribu... Harga sch 40
http://www.jualbesibetonhargapabrikmurah.com/category/besi-beton-pas-uli... Jual besi beton PAS
http://www.pusatbesibaja.co.id/harga-atap-spandek-jual-pabrik-toko-suppl... Jual Atap Spandek
http://www.pusatbesibaja.com/harga-atap-spandek-agen-toko-pabrik-produse... Jual Atap Spandek
http://ironsteelcenter.com ironsteelcenter.com
http://www.gudangbesibaja.com/category/besi-baja-wf/ Distributor besi wf baja
http://www.undangancinta.com undangan pernikahan kalender
http://www.sentrabesibaja.com/plat-bordes-kembang/ Jual Plat Bordes Kembang
http://ironsteelcenter.com/besi-baja-wf-iwf-wide-flange-beam-ss400-a36/h... Agen Besi Wf Baja
http://www.gudangbesibaja.com/harga-pipa-sch-40-schedule-pabrik-distribu... Jual sch 40
http://www.jualbesibetonhargapabrikmurah.com/category/besi-beton-master-... Jual besi beton master steel ms
http://www.pusatbesibaja.co.id/harga-atap-spandek-jual-pabrik-toko-suppl... Supplier Atap Spandek
http://www.pusatbesibaja.com/harga-atap-spandek-agen-toko-pabrik-produse... Supplier Atap Spandek
http://ironsteelcenter.com/category/stainless-steel-ss-sus-304-210-316-3... Distributor stainless steel
http://www.gudangbesibaja.com/category/besi-baja-unp-kanal-u/ Distributor besi unp
https://goo.gl/XZ6zpY undangan pernikahan ala india
http://www.sentrabesibaja.com/plat-besi-baja-hitam/ Jual Plat Besi Hitam
http://ironsteelcenter.com/besi-baja-wf-iwf-wide-flange-beam-ss400-a36/h... Toko Besi Wf Baja
http://www.gudangbesibaja.com/harga-pipa-sch-40-schedule-pabrik-distribu... Supplier sch 40
http://www.jualbesibetonhargapabrikmurah.com/category/besi-beton-ksty-ul... Jual besi beton ksty

Pievienot jaunu komentāru

(If you're a human, don't change the following field)
Your first name.
(If you're a human, don't change the following field)
Your first name.
(If you're a human, don't change the following field)
Your first name.

Plain text

  • No HTML tags allowed.
  • Interneta lapu adreses un e-pastu adreses pārvēršas saitēs automātiski.
  • Rindas un paragrāfi tiek nolauzti automātiski.