Gunakan MimeTex/LaTex untuk menulis simbol dan persamaan matematika.

Selamat datang, Pengunjung. Silahkan masuk atau mendaftar. Apakah anda lupa aktivasi email?

Desember 02, 2021, 11:30:18 PM

Masuk dengan nama pengguna, kata sandi dan lama sesi

Topik Baru

Artikel Sains

Anggota
Stats
  • Total Tulisan: 139668
  • Total Topik: 10408
  • Online Today: 30
  • Online Ever: 441
  • (Desember 18, 2011, 12:48:51 AM)
Pengguna Online
Users: 0
Guests: 29
Total: 29

Ikuti ForSa

ForSa on FB ForSa on Twitter

Penulis Topik: Efek Mekanika kuantum pada proses fotosintesis  (Dibaca 12637 kali)

0 Anggota dan 1 Pengunjung sedang melihat topik ini.

Offline reborn

  • Founder
  • Profesor
  • *****
  • Tulisan: 2.256
  • IQ: 322
  • Gender: Pria
  • ForSa
Efek Mekanika kuantum pada proses fotosintesis
« pada: April 15, 2007, 01:13:45 PM »
Fotosintesis adalah suatu proses yang merubah energi cahaya (matahari) menjadi energi kimia dalam bentuk pengikatan karbon. Proses ini melibatkan rantaian reaksi molekuler dan dibantu oleh klorofil. Konversi energi ini sangat efisien, mendekati 100%, dan berlangsung relatif singkat. Bagaimana hal ini bisa terjadi masih merupakan tanda tanya. Tapi baru2 ini  studi dari Lawrence Berkeley National Laboratory menyarankan bahwa efek mekanika kuantumlah yang berperan dalah proses fotosintesis.

Quantum Secrets of Photosynthesis Revealed

Kutip
“We have obtained the first direct evidence that remarkably long-lived wavelike electronic quantum coherence plays an important part in energy transfer processes during photosynthesis,” said Graham Fleming, the principal investigator for the study. “This wavelike characteristic can explain the extreme efficiency of the energy transfer because it enables the system to simultaneously sample all the potential energy pathways and choose the most efficient one.”

The photosynthetic technique for transferring energy from one molecular system to another should make any short-list of Mother Nature’s spectacular accomplishments. If we can learn enough to emulate this process, we might be able to create artificial versions of photosynthesis that would help us effectively tap into the sun as a clean, efficient, sustainable and carbon-neutral source of energy.

Towards this end, Fleming and his research group have developed a technique called two-dimensional electronic spectroscopy that enables them to follow the flow of light-induced excitation energy through molecular complexes with femtosecond temporal resolution. The technique involves sequentially flashing a sample with femtosecond pulses of light from three laser beams. A fourth beam is used as a local oscillator to amplify and detect the resulting spectroscopic signals as the excitation energy from the laser lights is transferred from one molecule to the next. (The excitation energy changes the way each molecule absorbs and emits light.)

Selanjutnya baca di link di atas ya  ;D

 

Related Topics

  Subyek / Dimulai oleh Jawaban Tulisan terakhir
0 Jawaban
6696 Dilihat
Tulisan terakhir April 07, 2007, 10:33:56 PM
oleh reborn
0 Jawaban
5409 Dilihat
Tulisan terakhir Maret 04, 2009, 12:58:17 AM
oleh ricky_fusion
8 Jawaban
158477 Dilihat
Tulisan terakhir Juni 18, 2011, 04:18:27 AM
oleh heru.htl
0 Jawaban
175986 Dilihat
Tulisan terakhir November 11, 2016, 02:32:15 AM
oleh handsomemedia
3 Jawaban
1430 Dilihat
Tulisan terakhir Februari 27, 2018, 06:04:14 AM
oleh seputarberita88