Tick the specs you need to submit them together; or enquire one by one. Cat. numbers are carried into the RFQ.
Q1:菌悬液要怎么制备?
A:离心去除培养基,收集样本细菌,用 0.85% NaCl 溶液洗涤细胞 3 次(必须充分洗涤以去除培养基,残余的培养基会影响染色效果;不要用 PBS 等磷酸盐缓冲液洗涤,会影响染色效果)。 然后用 0.85% NaCl 溶液制备细胞悬液。
Q:说明书上写的是一个视野可以看到两种颜色,而我同一激发光为什么看不到两种颜色,分开激发就可以,为什么?
A: 有些显微镜是长通滤片,是可以观察到两种荧光;有的显微镜是短通滤片,不能同时观察到两种荧光的。若客户显微镜为短通道的滤片,建议客户分开激发和观察。
Q:两个染料受酯酶的影响吗?
A:不受
Q:说明书上写DMAO染色活细菌和死细菌于荧光显微镜或共聚焦显微镜下呈现绿色荧光,EthD-III染色膜受损的死细菌呈现红色荧光,那实际染色结果会是怎样的呢?
A:DMAO为膜透过性核酸染料可染色活细菌的DNA,其结合DNA的原理不能明确;EthD-III不具膜透过性仅可染色死细菌DNA,该染料为DNA插入型染料,具AT碱基偏好性(参考文献PMID:9016307)。在实际染色结果中会出现这样两种情况,且以下两种结果均为正常结果,原因是一方面染料结合DNA的情况,另一方面因细菌在染色液中的布朗运动:
1、红色荧光和绿色荧光出现共定位
在使用该试剂已发表的文献中参考PMID: 34161080,呈现红绿荧光共定位结果。
2、死细菌为红色荧光,活细菌及不健康细菌为绿色荧光,红色荧光和绿色荧光未呈现共定位。
Q:当用于染色细菌在共聚焦皿形成生物膜时,加入的染色液是否需要去除以及是否需要PBS buffer清洗?
A:染色液可以去除;可不进行PBS 清洗。
Published citations
[1] Li X, Gui R, Li J, et al. Novel Multifunctional Silver Nanocomposite Serves as a Resistance-Reversal Agent to Synergistically Combat Carbapenem-Resistant Acinetobacter baumannii. ACS Appl Mater Interfaces. 2021;13(26):30434-30457. doi:10.1021/acsami.1c10309(IF:9.229)
[2] Yang X, Jia M, Li Z, et al. In-situ synthesis silver nanoparticles in chitosan/Bletilla striata polysaccharide composited microneedles for infected and susceptible wound healing [published online ahead of print, 2022 Jun 23]. Int J Biol Macromol. 2022;215:550-559. doi:10.1016/j.ijbiomac.2022.06.131(IF:6.953)
[3] Wang Z, Ke M, He L, et al. Biocompatible and antibacterial soy protein isolate/quaternized chitosan composite sponges for acute upper gastrointestinal hemostasis. Regen Biomater. 2021;8(4):rbab034. Published 2021 Jun 30. doi:10.1093/rb/rbab034(IF:6.353)
[4] Xu M, Li J, Liu B, et al. The evaluation of long term performance of microbial fuel cell based Pb toxicity shock sensor. Chemosphere. 2021;270:129455. doi:10.1016/j.chemosphere.2020.129455(IF:5.778)
[5] Cao W, Zeng Z, He Z, Lei S. Hypoxic pancreatic stellate cell-derived exosomal mirnas promote proliferation and invasion of pancreatic cancer through the PTEN/AKT pathway. Aging (Albany NY). 2021;13(5):7120-7132. doi:10.18632/aging.202569(IF:5.682)
[6] Tang J, Wang W, Chu W. Antimicrobial and Anti-Quorum Sensing Activities of Phlorotannins From Seaweed (Hizikia fusiforme). Front Cell Infect Microbiol. 2020;10:586750. Published 2020 Oct 30. doi:10.3389/fcimb.2020.586750(IF:4.123)
[7] Yan Y, Zhou P, Lu H, et al. Potential apply of hydrogel-carried chlorhexidine and metronidazole in root canal disinfection. Dent Mater J. 2021;40(4):986-993. doi:10.4012/dmj.2020-299(IF:2.102)
[8] Cong S, Tong Q, Peng Q, et al. In vitro anti‑bacterial activity of diosgenin on Porphyromonas gingivalis and Prevotella intermedia. Mol Med Rep. 2020;22(6):5392-5398. doi:10.3892/mmr.2020.11620(IF:2.100)
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