Noc ran: Vu khi toi uu cua tu nhien.

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Noc ran: Vu khi toi uu cua tu nhien

Noc doc cua ran la mot loai vu khi chet nguoi, duoc hinh thanh trong khoang thoi gian tren 100 trieu nam. No cuop di sinh mang cua hang chuc nghin nguoi moi nam. Va nho vao cac cong trinh nghien cuu moi, no co the la nen tang cua nhung lieu phap chua tri moi cuu song rat nhieu nguoi..

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Noc ran: Vu khi toi uu cua tu nhien.

La loai san moi nhung ran thieu nhung dac diem quan trong. Chung khong co chan de san duoi con moi, khong co mong vuot de ha guc va kep chat con moi. Nhung nhung thieu sot tren khong he han gi vi tien hoa da ban cho loai ran mot loai vu khi toi uu: Noc doc. Voi loai vu khi  nay, vai tram loai ran doc co the giet va lam yeu suc con moi truoc khi chung co the tron thoat.

Noc doc da bien loai ran thanh mot ke san moi nho be nhung hieu qua, va chung co mat o khap moi noi – mien la moi truong  du am de chung van dong. Ran song o bat cu noi nao tu ngon cay den rung ram, o sa mac va trong bien ca.

Nhin chung, cac nha khoa hoc  deu thong nhat  ve cac tuyen doc tien hoa nhu the nao, nhung ban than  chat doc lai la truong hop khac. Mot so nha khoa hoc cho rang noc doc co thanh phan la cac chat protein bi bien doi tu nuoc bot ran von co chuc nang pha vo va tieu hoa con moi. Mot so khac lai tin rang kha nang san sinh ra chat doc tien hoa doc lap  o nhung loai ran khac nhau.

Nhung nha nghien cuu  nguoi Uc Bryan Fry, mot trong nhung chuyen gia  hang dau cua the gioi  ve ran doc, lai co gia thiet khac. Voi su tro luc tu phan tich  ADN, ong da kham pha ra phan lon cac protein va enzyme tim thay trong noc doc kha gan voi cac chat co o nhung phan khac tren co the ran – vi du nhu cac chat trong gan, trong co quan tieu hoa hoac cac he khac. Gien dieu khien san xuat cac chat nay trong nhung bo phan, theo mot cach nao do, duoc kich hoat trong tuyen nuoc bot cua ran, noi chung san xuat ra nhung chat mot khi bi bien doi va cai tao co the giup loai ran tieu diet con moi cuc ky hieu qua.

Fry cung tin rang kha nang nay xuat hien vao mot thoi gian nhat dinh, tren 100 trieu nam truoc day o mot trong nhung to tien so khai nhat cua ran hien dai. Sau do no xuat hien o tat ca cac loai ran, nhung chi duoc phat trien va cai bien o 3 ho ran ma hien nay chung ta xem la doc. Noc ran, noi cach khac lau doi hon ban than  loai ran.

Noc ran cuop di sinh mang cua hang chuc nghin nguoi moi nam. Va nho vao cac cong trinh nghien cuu  moi, no co the la nen tang cua nhung lieu phap chua tri moi cuu song rat nhieu nguoi. (Anh: Robert  Valentic/Nature PL)

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Theo Khoa hoc

Updated: 18/03/2008 | Views: 438 | Comments: 0

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Hien tai chua co binh luan nao ve bai viet Noc ran: Vu khi toi uu cua tu nhien!

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