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在gram-positive gram-negative這個產品中，有3篇Facebook貼文，粉絲數超過5,816的網紅史丹福狂想曲，也在其Facebook貼文中提到， 今天跟大家談一談基本的微生物學知識。 細菌主要分為兩大類，革蘭氏陽性（Gram positive）及革蘭氏陰性（Gram negative）。革蘭其實是一種染色的方法，能夠被這染料上色的細菌就是革蘭氏陽性，不能夠被上色的就是革蘭氏陰性。在顯微鏡下，經革蘭氏染色處理後的革蘭氏陽性細菌是藍紫色的，...

gram-positive gram-negative 在 史丹福狂想曲 Facebook 的最佳貼文

史丹福狂想曲 By 史丹福狂想曲

2017-08-28 15:53:56 有 119 人按讚
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今天跟大家談一談基本的微生物學知識。

細菌主要分為兩大類，革蘭氏陽性（Gram positive）及革蘭氏陰性（Gram negative）。革蘭其實是一種染色的方法，能夠被這染料上色的細菌就是革蘭氏陽性，不能夠被上色的就是革蘭氏陰性。在顯微鏡下，經革蘭氏染色處理後的革蘭氏陽性細菌是藍紫色的，而革蘭氏陰性細菌則是紅色的。

為什麼要這樣用染色的特性來為細菌分類呢？原來染色的特性是來自細胞壁（cell wall）的結構。革蘭氏陽性及陰性細菌有不同的細胞壁結構，令它們有不同的染色特性，同時也又不同的致病性質。

革蘭氏陰性細菌的細胞壁只有一層薄薄的肽聚醣（peptidoglycan），所以較不上色。但它有一層外膜（outer membrane），可以阻抽抗生素穿透，所以革蘭氏陰性細菌一般都對抗生素的抵抗性比較高。另外，革蘭氏陰性細菌有一層脂多糖（lipopolysaccharide），它是一種內毒素（endotoxin），一但進入血液裡，會引起激烈的發炎反應，造成惡名昭彰的敗血性休克（septic shock）。因此革蘭氏陰性細菌入血往往都比革蘭氏陽性細菌入血危急及嚴重。

革蘭氏陽性細菌細胞壁的肽聚醣比陰性細菌厚得多，所以它容易被革蘭氏染劑上色。但它沒有外膜及脂多糖，所以抗生素較易穿過革蘭氏陽性細菌的細胞壁，而且革蘭氏陽性細菌也較少引起敗血性休克。但革蘭氏陽性細菌入血也會引起一個麻煩的問題，因為它們的細胞壁含有磷壁酸（teichoic acid），較容易依附在心內膜（endocardium）中，所以容易引起非常麻煩的感染性心內膜炎（infective endocarditis）。

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gram-positive gram-negative 在 Nourul Wahab Depp Facebook 的最佳解答

Nourul Wahab Depp By Nourul Wahab Depp

2016-06-20 12:40:03 有 2 人按讚
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Hello.
Latest range of products from Esmeria.

Esmeria Soothing Organics Anti-bac Gentle Handwashes are naturally antibacterial and ECOCERT-certified organic. Your hands work very hard everyday, so it is no surprise that they are highly susceptible to the ageing process. It’s time to give them the tender loving care they deserve with our specially formulated non-soap based hand washes. They are packed with soothing Organic Calendula Flower Extract and hydrating Organic Aloe Vera Juice. A mild cleansing agent derived from natural Amino Acid and Sugar will keep your hands clean and hydrated, while natural Vitamin E protects them from harmful free radicals. Totarol Extract, from the New Zealand tree Totara, is added as a powerful anti-bacterial active. Totarol Extract is a naturally recurring plant extract with clinically proven potent anti-bacterial activity against gram positive and gram negative bacteria. It is also one of the rare phytochemical actives against penicillin and methicillin resistant strains of Staphylococcus aureus, one of the common causes of skin infections. Our selection of soothing and refreshing scents derived from pure and naturally derived essential oils. Esmeria Soothing Organics Anti-bac Gentle Handwash comes in 4 scents – Lavender, Minty Citrus, Tangy Orange & Tea Tree Oil. Retailing at RM26.90.

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gram-positive gram-negative 在 小小藥罐子 Facebook 的最佳解答

小小藥罐子 By 小小藥罐子

2015-09-09 21:32:59 有 21 人按讚
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這種消毒藥水，顧名思義，是一些對傷口刺激性較低的消毒液。

其實，這類消毒藥水，常用的成分，主要是葡萄糖酸氯己定(Chlorhexidine gluconate)。

在藥理上，葡萄糖酸氯己定，是一種陽離子雙雙胍類(Cationic bisbiguanides)的消毒劑，還是一種陽離子表面活性劑(Cationic surfactant)。

所謂「陽離子(Cation)」，簡單說，是帶正電荷的離子。

葡萄糖酸氯己定，消毒的作用原理，在釋放陽離子的氯己定(Chlorhexidine)，因為帶正電荷，所以，能夠跟微生物細胞膜(Cell membrane)上的磷脂(Phospholipid)結合，破壞微生物的滲透屏障，讓微生物細胞膜的表面失去穩定性，從而干擾細胞膜的滲透功能，誘發微生物的體內出現滲漏的現象，導致微生物死亡，達到抑菌（低濃度）、殺菌（高濃度）的消毒效果。

在消毒上，氯己定是一種廣效消毒劑，能夠針對常見的革蘭氏陽性菌(Gram positive bacteria)、革蘭氏陰性菌(Gram negative bacteria)、厭氧菌(Anaerobes)、兼性厭氧菌(Facultative anaerobe)、真菌。

在應用上，氯己定對皮膚、黏膜，擁有不錯的親合力，一般而言，大約在30秒內，便能夠達到消毒的效果，而且，氯己定因為帶正電荷，在體內的吸收率，相對較低，所以，在使用上，一般較安全。

這類消毒劑，最大的優點，如上文所述，是擁有較低的刺激性，而且不受有機物的影響，例如血液、膿液，所以，一般較適合使用在傷口處理上。

最後，藥罐子想補充一點：

在包裝上，一般而言，葡萄糖酸氯己定，最常調配成為一種紅色的消毒藥水。

久而久之，藥罐子看見很多市民，開始用「唔『乸』的『紅』藥水」稱呼這種消毒藥水。

但是，世事無絕對，凡事總有例外！（藥罐子就是曾經見過黃色的葡萄糖酸氯己定消毒藥水！）

所以，當各位看倌選購這種消毒水的時候，藥罐子不建議單從消毒藥水的顏色進行分辨，還是留意一下包裝上標示的有效成分，這樣，便會穩當一些！

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本網誌旨在分享用藥知識，圖文僅供教育用途。 內容僅供參考，絕對不能用來自行診治。 本網誌致力確保內容準確，惟醫藥知識隨時更新，故對內容的準確性、完整性、及時性、適用性不會承擔任何責任。如有健康疑難，請盡快求醫，以免貽誤治療良機。部分內容涉及醫藥知識，可能會引起不安，敬請留意。
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#89. Gram stain - Pathology Outlines

Gram negative bacteria have a different cell wall structure, don't retain the crystal violet-iodine complex after decolorization, and so are ...

#90. Immediate Hemodynamic Effects of Gram-Negative vs Gram ...

Patients with gram-positive bacteremia and abacteremic patients undergoing similar instrumentations do not demonstrate comparable hemodynamic changes. Full Text.

#91. Bacteria 101: Cell Walls, Gram Staining, Common Pathogens

A Gram stain of gram-positive cocci Staphylococcus aureus (violet or purple) and the gram-negative bacilli Escherichia coli (pink), which are ...

#92. Gram Stain Procedure in Research and Labs - Verywell Health

Gram -positive bacteria have a thick layer made up of polymers of protein-sugar molecules called peptidoglycan. · Gram-negative bacteria have an ...

#93. Stool Gram stain Information | Mount Sinai - New York

Examples of Gram-negative bacteria include Escherichia coli (E coli), Salmonella, Hemophilus influenzae, as well as many bacteria that cause urinary tract ...

#94. Is Lactobacillus Gram-Positive? A Case Study of ... - MDPI

Lactobacillus iners is the most prevalent bacterial species in the human vaginal microbiome, and there have been few reports of its Gram-negative stain ...

#95. The 10 Most prevalent filamentous bacteria 1. Nocardia spp.

Gram positive, Neisser negative, irregularly-bent, short filaments mostly within the floc but frequently in foam trapped in the aeration basin or clarifier.

#96. What are Gram-negative bacteria? | PYROSTAR™

The test characterizes bacteria based upon the thickness of the peptidoglycan layer within their cell wall. Gram-positive bacteria have a very ...