Levis Chen 發問時間: 社會與文化語言 · 7 年前

請求幫忙翻譯,有關雙歧桿菌

Ballongue (2004) highlighted the advantages of adding bifidogenic

growth factors such as N-acetyl-D-glucosamine or cysteine, azide

and China ink to MRS agar medium to differentiate bifidobacteria

species, or vitamins such as pyridoxine (B6), thiamine (B1), cyanocobalamine

(B12), folic acid (B9) and nicotinic acid (PP) or different

selective agents such as polymyxin, propionate and linoleate. The

control of magnesium, manganese and iron levels was shown to be

essential for optimal growth of bifidobacteria or bacteriocin production,

as a result of nutritional stress or induction, according to circumstances

(Kang and Fung, 2000; O'Sullivan, 2001).

Most of bifidobacteria strains were also shown to grow effectively

in milk-based media, which constitutes a great advantage taking in

mind the high cost of synthetic media. So, several protein sources

such as liver, meat or yeast extract, peptones, horse blood, tomato

juice or human milk, along with antioxidant compounds such as cysteine,

ascorbic acid, or sodium sulfite have also been successfully

added to these media (Gomes and Malcata, 1999; Russell et al., 2011).

In addition to the components described above, many species of

bifidobacteria can also utilize complex biopolymers able to improve

cell growth and production of antimicrobials, including bifitose,

fructooligosaccharides (FOS) and xylooligosaccharides, among others.

These compounds, which are generally carbohydrates or their derivatives,

are metabolized by bifidobacteria, but not by the host or the

majority of other bacteria (Gomes and Malcata, 1999); among them,

the different types of linear and branched FOS, oligofructose and lactulose-based oligosaccharides show particularly high induction

rates. Dietary fibers have also been found to be effective in promoting

the intestinal growth of bifidobacteria (Dubey and Mistry, 1996;

Ishibashi et al., 1997). However, not all strains have the same nutritional

requirements.

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  • 匿名使用者
    7 年前
    最佳解答

    Ballongue (2004)強調的優勢加入雙歧

    生長因子,如N-乙酰基-D -葡糖胺或半胱氨酸,疊氮基

    中國油墨MRS瓊脂培養基區分雙歧桿菌

    種,或吡哆醇( B6 ) ,硫胺素( B1 ),氰鈷胺素等維生素

    ( B12 ) ,葉酸( B9 )和菸酸(PP)或不同的

    選擇性試劑如多粘菌素,丙酸鹽和亞油酸。該

    控制,鎂,錳和鐵的含量,結果顯示對

    必不可少的雙歧桿菌或細菌素生產的最佳生長,

    作為營養的應力或感應的結果,根據情況的

    康豐, 2000年,奧沙利文( 2001年) 。

    雙歧桿菌的菌株也顯示有效增長

    牛奶為主的媒體,這構成了很大的優勢

    介意合成介質的成本較高。所以,一些蛋白質來源

    如肝,肉或酵母提取物,蛋白腖,馬血,番茄

    果汁或人乳中,具有抗氧化化合物如半胱氨酸,

    抗壞血酸,亞硫酸鈉,也已成功

    這些媒體( 1999;戈麥斯和馬爾卡塔,羅素等人, 2011年) 。

    除上述成分如上所述,許多種

    雙歧桿菌也可以利用複雜的生物聚合物,能夠提高

    細胞的生長和生產的抗微生物劑,包括bifitose ,

    低聚果糖( FOS ) ,低聚木糖,等等。

    這些化合物中,這是一般的碳水化合物或它們的衍生物,

    雙歧桿菌代謝,但不能由主機或

    大多數其他細菌(戈麥斯和馬爾卡塔的,1999年) ;其中,

    不同類型的直鏈和支鏈的低聚果糖,低聚果糖和乳果糖寡糖顯示特別高的感應

    率。膳食纖維也被認為是有效地促進

    腸道雙歧桿菌生長( Dubey和密斯崔,1996 ;

    Ishibashi等人,1997)。然而,並非所有的菌株都具有相同的營養

    要求。

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