粉體行業在線展覽
粉體行業在線展覽
直接聯系
北京澳作生態儀器有限公司
美國
面議
453
應用
Y(II)或ΔF/FM’ 或 (FM’ – FS )/FM’) 是經受時間考驗的光適應測量參數，比FV/FM對更多類型的植物脅迫更加敏感。已有的大量證據表明FV/FM對許多種植物脅迫和健康植物的光系統II的測量十分出色，而Y(II)或光量子產額則可測量實際光照下光適應環境和生理狀況的光系統II的效率。
原理
采用調制飽和脈沖原理，測量植物的葉綠素熒光，通過相關文獻的研究成果，計算植物的光量子產額及相對電子傳遞速率，同時可測量PAR、葉溫、相對濕度等環境參數。
特點
葉片吸收測量：提供葉片吸收測量及隨環境變化導致的葉片吸收變化。根據Eichelman (2004) 葉片吸收在健康植物的變化范圍在0.7~0.9 之間。因此，為獲得準確的ETR或“J”，Y(II)測量儀提供了一個可靠的測量方法，
FV/FM測量單元：可額外選配FV/FM測量儀，用于暗適應測量。
具有暗適應葉夾
陽光下屏幕可見
圖形顯示FV/FM曲線
2GB存儲空間
USB通訊
數據Excel查看
先進的PAR葉夾：采用底部葉夾打開裝置，防止測量時誤操作打開葉夾。對傳感器進行余弦校正，確保葉片相對測量光的角度不變。
FM’校正：對于具有高光照強度歷史的植物，完全關閉光反應中心是一個問題，Y(II)測量儀使用Loriaux &Genty 2013的方法進行FM’校正，確保誤差*小。
自動調制光設定：快速準確自動的調整合適的調制光強，避免人工操作的誤差。
先進算法避免飽和脈沖NPQ：采用25ms內8點的平均值確定FM’，消除飽和脈沖NPQ的影響。
更精確的葉溫測量：采用非接觸式紅外測量，測量精度可達±0.5℃。
直接測量相對濕度：含有測量氣體交換使用的固態傳感器，可測量相對濕度。
降低葉片遮擋的設計：傾斜的角度減少對葉片的遮擋，可以測量擬南芥等小葉。
系統組成
標配：
Y(II)光量子產額測量儀、充電器、USB電纜、便攜箱、2個吸收測量單元、U盤（包含說明書）。
可選：
FV/FM測量儀及10個暗適應葉夾、三腳架。
技術指標
測量參數：
Y(II)或ΔF/Fm‘、ETR、PAR、T、FMS或FM’、Fs、α(葉片吸收)。
監測模式：可使用電腦，長時間監測Y(II)、ETR、葉片吸收、PAR、葉溫、相對濕度、及計算NPQ。
相對濕度：5%~95%，±2%。
可選參數：FV/FM、FV/FO，FO， FM， FV。
可使用AC或USB供電，可配三腳架。
技術參數：
光源
飽和脈沖：白色LED具有PAR時7000μmols
調制光：紅色LED 660nm，具有690nm短波過濾。
光化光源：僅可使用外部光源
檢測方法：調制脈沖法
檢測器&過濾器：具有700~750nm帶通過濾的PIN光電二極管
取樣速率：1~10000點/秒自動切換。
測量時間：3s或長期監測
存儲空間：2GB
輸出：USB
尺寸：便攜箱尺寸為14”x 11”x 6”，儀器為9’’長
質量：Y(II) 測量儀0.45 kg
FV/FM測量儀0.36 kg.
總重1.95 kg.
產地
美國
文獻
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