Whatman 10408472, ME28/41 ST 1.2 um 50MM 100/PK

Whatman mixed cellulose ester membranes are composed of cellulose acetate and cellulose nitrate. These membranes are characterized by a smoother and more uniform surface than pure nitrocellulose Filters. Also, the color contrast provided by the Filter surface facilitates particle detection and minimizes eye fatigue. The ME range has a lower cellulose acetate content compared to the WME range of membranes.

In microbiological colony counting procedures, the color contrast between the surface and the colonies facilitates the counting process. Many microbiological techniques include colony counting after incubation as the standard method of quantitation. Whatman gridded Filters have clearly defined grid lines spaced at 3.1 mm or 5 mm intervals. The special ink used is nontoxic and completely free from bacterial growth inhibitors. Whatman black mixed cellulose esters are available plain for automatic colony counting applications, as well as gridded to assist in manual counting procedures. Black membranes provide contrast between residue or cell colors and the Filter without having to counter-stain the membrane.

Features:

• Sterile options available for critical applications.
• Excellent contrast for easier particle detection.
• Grids are nontoxic and do not inhibit bacterial growth, ensuring sample integrity.
• Black plain and black gridded membranes have a mix of cellulose nitrate and cellulose acetate.
• The membrane offers a high degree of internal surface area for greater adsorption of product.
• Higher dirt loading capacity.
• Biologically inert with good thermal stability.
• No surfactants to contaminate samples.
• Uniform microporous structure of membrane gives high flow rates.

Whatman 混合纖維素酯薄膜是由醋酸纖維素和硝酸纖維素組成。這些薄膜與純硝化纖維素濾紙相比具有更平滑、更均勻的表面特徵。濾紙表面提供的顏色對比度使顆粒檢測更容易，最大程度地減少眼睛疲勞。ME 系列的纖維素醋酸酯含量比 WME 系列的薄膜低。

在微生物菌落計數程序中，表面與菌落之間的顏色對比有助於計數過程。許多微生物學技術在孵育後都包括菌落計數作為標準的計量方法。Whatman 方格濾紙在 3.1毫米或5毫米的間隔處具有明確的方格線。所使用的特殊油墨無毒，完全不含細菌抑制劑。Whatman 黑色混合纖維素酯薄膜可用於自動菌落計數應用的普通以及方格狀濾紙，以協助手動計數程序。黑色薄膜提供了殘留物或細胞顏色與濾紙之間的對比，而不必對薄膜進行對比染色。

特徵：

• 可用於關鍵應用的無菌選項。
• 卓越的對比度，更容易檢測顆粒。
• 線網無毒，不會抑制細菌生長，確保樣品完整性。
• 黑色普通和黑色方格薄膜具有硝酸纖維素和纖維素醋酸酯的混合物。
• 薄膜提供高度的內部表面積，以更大程度地吸附產品。
• 較高的雜物裝載能力。
• 生物惰性，具有良好的熱穩定性。
• 無表面活性劑污染樣品。
• 薄膜的均勻微孔結構具有高流速。