示意圖，僅供參考，商品以實物為準Jensen's Medium
詹森氏固氮菌培養基
別名與縮寫：Jensen Medium · Jensen's Agar · Nitrogen-Free Jensen's Medium · Jensen's N-Free Medium · Jensen 固氮菌培養基 · 無氮培養基
For the detection and cultivation of nitrogen-fixing bacteria.
- 類別
- 粉末培養基
- 包裝規格
- 500 g · 5 kg · 25 kg
資料更新：2026-11-06
產品說明
原理
Nitrogen-fixing organisms are free-living bacteria that grow on a medium containing no source of combined nitrogen, deriving their nitrogen requirement from atmospheric nitrogen gas.¹ The nitrogen assimilated into cell protein is subsequently mineralized in the soil, contributing to the nitrogen available to crop plants. Jensen's Medium is formulated according to Jensen and contains no nitrogen source, so that only nitrogen-fixing organisms are able to grow.¹ Sucrose provides the carbon and energy source. Sodium molybdate enhances nitrogen fixation, as molybdenum is an essential cofactor of the nitrogenase enzyme complex. Dipotassium phosphate buffers the medium, magnesium sulphate and ferrous sulphate supply essential ions, and sodium chloride maintains the osmotic equilibrium. Calcium carbonate neutralizes the acids produced during metabolism and renders the medium slightly opalescent.
配製與使用
Suspend 39.1 g of powder in 1 L of purified water. Heat with continuous stirring and bring to the boil for 1 minute. Sterilize by autoclaving at 121°C for 15 minutes. Cool to 45-50°C. Mix well to evenly suspend the calcium carbonate and pour into sterile Petri plates. Test the finished medium for performance using stable, standard control cultures.
產品特色
- 500 g / 5 kg / 25 kg 三種以上包裝，研究室到工業規模都適用
- 可提供 COA、規格書與技術資料表，支援樣品申請
- 台灣製造，供貨穩定
常見問題
01這個產品要怎麼配製？
Suspend 39.1 g of powder in 1 L of purified water. Heat with continuous stirring and bring to the boil for 1 minute. Sterilize by autoclaving at 121°C for 15 minutes. Cool to 45-50°C. Mix well to evenly suspend the calcium carbonate and pour into sterile Petri plates. Test the finished medium for performance using stable, standard control cultures.
02大量採購如何詢價？可以提供 COA 嗎？
可以。本產品提供 500 g、5 kg、25 kg 等包裝規格，請於詢價時說明應用場景與用量，一個工作天內回覆，並可提供 COA、規格書與技術資料表。
03台灣有現貨嗎？交期多久？
本產品在新北市汐止的自有工廠生產、台灣出貨，不需進口與清關。交期依庫存與包裝規格而定，詢價時告知品項與用量，我們會一併回覆現貨狀況與交期；急件請在詢價單註明。
04可以開立統一發票嗎？學校與研究機構可以請購嗎？
可以。我們開立台灣統一發票（含營業稅），學校、研究機構與公家單位可依請購流程先索取報價單再下單；小包裝與樣品申請都接受。
05有中文版的 SDS 與規格書嗎？
有。規格書（TDS）與 SDS 以英文版為標準文件，登入後可在產品頁下載；中文版 SDS 依需求提供，請在詢價單或聯絡表單註明品項與用途，我們會隨報價寄出。每批出貨附 COA。
參考文獻
- 1. Jensen H. L., 1942. Nitrogen fixation in leguminous plants. Proc. Linn. Soc. N.S.W., 67:98-108.
- 2. Subba Rao N. S., 1977. Soil Microorganisms and Plant Growth, Oxford and IBH Publishing Co., New Delhi.