| 5 | 1/1 | 返回列表 |
| 查看: 840 | 回復(fù): 5 | ||||
| 當前只顯示滿足指定條件的回帖,點擊這里查看本話題的所有回帖 | ||||
宣煊木蟲 (小有名氣)
超級木蟲
|
[求助]
求教大神:植物組織中H2S含量的測定方法 已有2人參與
|
|||
求教哪位大神做過植物組織中H2S含量的測定,希望可以告知實驗中具體用到的藥品和試劑以及實驗操作步驟!在此感激不盡!!![]() |

|
將試管用封口膜迅速封好,于37 度反應(yīng)15 min 670 nm 測吸光值 參考Journal of Integrative Plant Biology 2008, 50 (12): 1518–1529 , 按照文獻翻譯過來嘗試做過,但沒有成功,弄不清楚那個吸收裝置是怎么弄的,樓主可以參考下我的 ,自己仔細看看文獻,如果樓主成功了,請不吝分享![]() PS: 另有文獻說可以用氣相色譜法和電極法,我們這邊沒條件做,樓主如果有條件可以查閱相關(guān)文獻 另現(xiàn)在有熒光探針可以定性 祝好運 |

專家顧問 (職業(yè)作家)
![]() |
專家經(jīng)驗: +426 |
|
Measurement of H2S content H2S quantification was performed as described by Nashef et al. (1977). The chemical treatments were the same as the measurements of Na+ and K+ contents. Following the treatments, the root of seedlings were ground into fine powder with a mortar and pestle under liquid nitrogen and 0.3 g of frozen tissue were homogenized in 1 ml 100 mM potassium phosphate buffer (pH 7) containing 10 mM ethylenediaminetetraacetic acid (EDTA). The homogenate was centrifuged at 15,000×g for 20 min at 4 °C, and 100 μl of the supernatant was used for the quantification of H2S, in an assay mixture also containing 1,880 μl extraction buffer and 20 μl 20 mM 5,5′- dithiobis (2-nitrobenzoic acid), to a total volume of 2 ml. The assay mixture was incubated at room temperature for 2 min and the absorbance was read at 412 nm. H2S was quantified based on a standard curve of known concentrations of NaHS 本段出自 Hydrogen sulfide is involved in maintaining ion homeostasis via regulating plasma membrane Na+/H+ antiporter system in the hydrogen peroxide-dependent manner in salt-stress Arabidopsis thaliana root Protoplasma (2014) 251:899–912 |

木蟲 (小有名氣)
超級木蟲

|
內(nèi)源H2S含量測定方法: 1)試劑 a, 磷酸緩沖液(PH 6.8)50 mM(含0.1M EDTA 和 0.2 M 抗壞血酸 ) b, PBS PH 7.4 100 mM c, L- Cys 10 mM d, 磷酸吡哆醛 2 mM e, 二甲基對本二胺 5mM(溶入3.5 mM H2SO4) f, 硫酸鐵銨 50 mM (溶入100 mM H2SO4) g, Na2S 溶液(配成已知濃度梯度) 2)繪制標準曲線 稱取Na2S 9H2O 0.2402g 加新沸冷卻的dd water定容至100ml. 取a 將其稀釋為0.5、1、2、4、8、16 μM 測已知濃度Na2S 670 nm吸光值,繪制標準曲線 3)測樣品中H2S含量 取0.5 g 樣品在5 ml a中冰浴研磨 將勻漿與b,c,d 混合,室溫放置,離心取上清 將裝有醋酸鋅的吸收井置于裝有上清的小測試管中,反應(yīng)30 min 加0.3 ml e 加0.3 ml f |

| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 286分人工智能專業(yè)請求調(diào)劑愿意跨考! +3 | lemonzzn 2026-03-17 | 3/150 |
|
|---|---|---|---|---|
|
[考研] 生物學(xué)調(diào)劑招人!! +3 | 山海天嵐 2026-03-17 | 4/200 |
|
|
[考研] 288求調(diào)劑,一志愿華南理工大學(xué)071005 +5 | ioodiiij 2026-03-17 | 5/250 |
|
|
[考研] 0703化學(xué)調(diào)劑 +4 | 18889395102 2026-03-18 | 4/200 |
|
|
[考研]
|
.6lL 2026-03-18 | 6/300 |
|
|
[考研] 286求調(diào)劑 +6 | lemonzzn 2026-03-16 | 10/500 |
|
|
[考研] 295求調(diào)劑 +3 | 一志愿京區(qū)211 2026-03-18 | 5/250 |
|
|
[考研] 070300化學(xué)319求調(diào)劑 +6 | 錦鯉0909 2026-03-17 | 6/300 |
|
|
[考研]
|
胡辣湯放糖 2026-03-15 | 6/300 |
|
|
[考研] 303求調(diào)劑 +4 | 睿08 2026-03-17 | 6/300 |
|
|
[考研] 工科材料085601 279求調(diào)劑 +6 | 困于星晨 2026-03-17 | 6/300 |
|
|
[考研] 生物學(xué)071000 329分求調(diào)劑 +3 | 我愛生物生物愛?/a> 2026-03-17 | 3/150 |
|
|
[考研] 301求調(diào)劑 +9 | yy要上岸呀 2026-03-17 | 9/450 |
|
|
[考研] 材料工程專碩274一志愿211求調(diào)劑 +6 | 薛云鵬 2026-03-15 | 6/300 |
|
|
[考研] 302求調(diào)劑 +4 | 小賈同學(xué)123 2026-03-15 | 8/400 |
|
|
[考研] 一志愿211 0703方向310分求調(diào)劑 +3 | 努力奮斗112 2026-03-15 | 3/150 |
|
|
[考研] 0856求調(diào)劑 +3 | 劉夢微 2026-03-15 | 3/150 |
|
|
[考研] 求老師收留調(diào)劑 +4 | jiang姜66 2026-03-14 | 5/250 |
|
|
[考研] 080500,材料學(xué)碩302分求調(diào)劑學(xué)校 +4 | 初識可樂 2026-03-14 | 5/250 |
|
|
[考研] 中科大材料與化工319求調(diào)劑 +3 | 孟鑫材料 2026-03-14 | 3/150 |
|