Rücktitelbild: Living and Conducting: Coating Individual Bacterial Cells with In Situ Formed Polypyrrole (Angew. Chem. 35/2017)

2017 ◽  
Vol 129 (35) ◽  
pp. 10744-10744
Author(s):  
Rong-Bin Song ◽  
YiChao Wu ◽  
Zong-Qiong Lin ◽  
Jian Xie ◽  
Chuan Hao Tan ◽  
...  
Keyword(s):  
Bacterial Cells ◽  
Conducting Coating

Back Cover: Living and Conducting: Coating Individual Bacterial Cells with In Situ Formed Polypyrrole (Angew. Chem. Int. Ed. 35/2017)

2017 ◽  
Vol 56 (35) ◽  
pp. 10608-10608
Author(s):  
Rong-Bin Song ◽  
YiChao Wu ◽  
Zong-Qiong Lin ◽  
Jian Xie ◽  
Chuan Hao Tan ◽  
...  
Keyword(s):  
Bacterial Cells ◽  
Back Cover ◽  
Conducting Coating

scholarly journals Living and Conducting: Coating Individual Bacterial Cells with In Situ Formed Polypyrrole

2017 ◽  
Vol 56 (35) ◽  
pp. 10516-10520 ◽  
Author(s):  
Rong-Bin Song ◽  
YiChao Wu ◽  
Zong-Qiong Lin ◽  
Jian Xie ◽  
Chuan Hao Tan ◽  
...  
Keyword(s):  
Bacterial Cells ◽  
Conducting Coating

scholarly journals Living and Conducting: Coating Individual Bacterial Cells with In Situ Formed Polypyrrole

2017 ◽  
Vol 129 (35) ◽  
pp. 10652-10656 ◽  
Author(s):  
Rong-Bin Song ◽  
YiChao Wu ◽  
Zong-Qiong Lin ◽  
Jian Xie ◽  
Chuan Hao Tan ◽  
...  
Keyword(s):  
Bacterial Cells ◽  
Conducting Coating

Природные материалы для сорбционной очистки хром- и кадмийсодержащих инфильтратов полигонов ТБО

2019 ◽  
pp. 13-19
Author(s):  
A. Safonov ◽  
N. Andriushchenko ◽  
N. Popova ◽  
K. Boldyrev
Keyword(s):  
Sorption Capacity ◽  
Electron Acceptors ◽  
Bacterial Cells ◽  
Maximum Sorption Capacity ◽  
Sorption Material ◽  
Maximum Sorption ◽  
Properties Of Materials ◽  
Solid Waste Landfills ◽  
Sorption Characteristics

Проведен анализ сорбционных характеристик природных материалов (вермикулит, керамзит, перлит, цеолит Трейд ) при очистке кадмий- и хромсодержащих сточных вод с высокой нагрузкой по ХПК. Установлено, что цеолит обладает максимальными сорбционными характеристиками для Cd и Cr и наименьшим биологическим обрастанием. При использовании вермикулита и керамзита или смесей на их основе можно ожидать увеличения сорбционной емкости для Cd и Сr при микробном обрастании, неизбежно происходящем в условиях контакта с водами, загрязненными органическими соединениями и биогенами. При этом биообрастание может повысить иммобилизационную способность материалов для редоксзависимых металлов за счет ферментативных ресурсов бактериальных клеток, использующих их в качестве акцепторов электронов. Эффект микробного обрастания разнонаправленно изменял параметры материалов: для Cr в большинстве случаев уменьшение и для Cd значительное увеличение. При этом дополнительным эффектом иммобилизации Cr является его биологическое восстановление биопленками. Варьируя состав сорбционного материала, можно подбирать смеси, оптимально подходящие для очистки вод инфильтратов с полигонов твердых бытовых отходов с высокой нагрузкой по ХПК и биогенным элементам как при использовании in situ, так и в системах на поверхности.The analysis of the sorption characteristics of natural materials (vermiculite, expanded clay, perlite, Trade zeolite) during the purification of cadmium and chromium-containing leachate with a high COD load was carried out. It was determined that zeolite had the maximum sorption capacity for Cd and Cr and the lowest biological fouling. When using vermiculite and expanded clay or mixtures on their basis, one can expect an increase in the sorption capacity for Cd and Cr during microbial fouling that inevitably occurs during contacting with water polluted with organic compounds and nutrients. In this case biofouling can increase the immobilization properties of materials for redox-dependent metals due to the enzymatic resources of bacterial cells that use them as electron acceptors. The effect of microbial fouling changed the parameters of materials in different directions: for Cr, in most cases, downward, and for Cd, significantly upward. Moreover, chromium biological recovery by biofilms is an additional effect of immobilization. Varying the composition of the sorption material provides for selecting mixtures that are optimally suitable for the purification of leachates from solid waste landfills with high COD and nutrients load, both when used in situ and in surface systems.

scholarly journals Visualization and Direct Counting of Individual Denitrifying Bacterial Cells in Soil by nirK-Targeted Direct in situ PCR

2011 ◽  
Vol 26 (1) ◽  
pp. 74-80 ◽  
Author(s):  
Noriko Ryuda ◽  
Tomoyoshi Hashimoto ◽  
Daisuke Ueno ◽  
Koichi Inoue ◽  
Takashi Someya
Keyword(s):  
Bacterial Cells ◽  
In Situ Pcr ◽  
Direct Counting

Preliminary Study on In Situ Realtime Quantitation of Target Bacteria on the Principle of Flow Cytometry

2017 ◽  
Vol 262 ◽  
pp. 224-227
Author(s):  
Gen Murakami ◽  
Yuichi Sugai ◽  
Kyuro Sasaki
Keyword(s):  
Flow Cytometry ◽  
Bacterial Culture ◽  
Scattered Light ◽  
Bacterial Suspension ◽  
Culture Solution ◽  
Bacterial Cells ◽  
Monitoring Wells ◽  
Measurement Principle ◽  
Preliminary Study

In-situ realtime method that can monitor the target bacteria should be used to determine the real situation of the bacteria in deep parts of heaps in heap bioleaching plants. This study suggest to apply flow cytometry technology to in-situ realtime monitoring of target bacteria. Flow cytometry is a method that can rapidly quantify the bacterial cells in bacterial suspension based on the detection of lights that are emitted from bacterial cells. In this study, we estimated the possibility of the application of flow cytometry to the selective detection of target bacteria. The bacterial culture solution that had been diluted by water including other bacteria was provided for fluorescence spectral analysis and scattered light analysis that were functions of flow cytometry. Our target bacteria could be selectively detected by those analyses in this study, therefore, it was shown that the flow cytometry could be useful for detecting target bacteria selectively. Because the measurement principle of flow cytometry is quite simple, it can be expected to be installed into deep heaps through the monitoring wells and determine the dominance of target bacteria in-situ and realtime in the future.

scholarly journals Prokaryotic Single-Cell RNA Sequencing by In Situ Combinatorial Indexing

2019 ◽  
Author(s):  
Sydney B. Blattman ◽  
Wenyan Jiang ◽  
Panos Oikonomou ◽  
Saeed Tavazoie
Keyword(s):  
Single Cell ◽  
Rna Sequencing ◽  
Low Cost ◽  
Bacterial Cells ◽  
Single Experiment ◽  
Bacterial Populations ◽  
Single Cell Rna Sequencing ◽  
Gene Expression Heterogeneity ◽  
Mrna Polyadenylation

AbstractDespite longstanding appreciation of gene expression heterogeneity in isogenic bacterial populations, affordable and scalable technologies for studying single bacterial cells have been limited. While single-cell RNA sequencing (scRNA-seq) has revolutionized studies of transcriptional heterogeneity in diverse eukaryotic systems, application of scRNA-seq to prokaryotes has been hindered by their extremely low mRNA abundance, lack of mRNA polyadenylation, and thick cell walls. Here, we present Prokaryotic Expression-profiling by Tagging RNA In Situ and sequencing (PETRI-seq), a low-cost, high-throughput, prokaryotic scRNA-seq pipeline that overcomes these technical obstacles. PETRI-seq uses in situ combinatorial indexing to barcode transcripts from tens of thousands of cells in a single experiment. PETRI-seq captures single cell transcriptomes of Gram-negative and Gram-positive bacteria with high purity and low bias, with median capture rates >200 mRNAs/cell for exponentially growing E. coli. These characteristics enable robust discrimination of cell-states corresponding to different phases of growth. When applied to wild-type S. aureus, PETRI-seq revealed a rare sub-population of cells undergoing prophage induction. We anticipate broad utility of PETRI-seq in defining single-cell states and their dynamics in complex microbial communities.

scholarly journals Effects of Baseplates of Orthodontic Appliances with in situ generated Silver Nanoparticles on Cariogenic Bacteria: A Randomized, Doubleblind Cross-over Clinical Trial

2015 ◽  
Vol 16 (4) ◽  
pp. 291-298 ◽  
Author(s):  
Roghayeh Ghorbanzadeh ◽  
Babak Pourakbari
Keyword(s):  
Clinical Trial ◽  
Silver Nanoparticles ◽  
Biofilm Formation ◽  
Orthodontic Appliances ◽  
Bacterial Cells ◽  
Streptococcus Sobrinus ◽  
Double Blind ◽  
Biofilm Inhibition ◽  
Cariogenic Bacteria

ABSTRACT Aim Polymethyl-methacrylate (PMMA) is commonly used primarily for baseplates of orthodontic appliances (BOA). The activities of cariogenic bacteria in biofilm on these surfaces may contribute to dental caries, gingival inflammation and periodontal disease. The PMMA incorporated with nanoparticles of silver (NanoAg-I-PMMA) and NanoAg in situ in PMMA (NanoAg-IS-PMMA) have been shown to control the growth of cariogenic bacteria, but clinical trial of anti-cariogenic application of these novel materials in orthodontics has not been evaluated. The main aim of the study is to compare the clinical effectiveness of using NanoAg-IS-PMMA and NanoAg-I-PMMA for construction of new BOA in inhibiting the planktonic growth and biofilm formation of the cariogenic bacteria. Materials and methods Twenty four patients with a median age of 12.6 years (7-15) harboring Streptococcus mutans, Streptococcus sobrinus and Lactobacillus acidophilus as well as Lactobacillus casei participated in the randomized, doubleblind, cross-over study. The experimental BOA, NanoAg-ISBOA and NanoAg-I-BOA, contained 0.5% w/w NanoAg while the control BOA was standard PMMA. Antibacterial effect of NanoAg-IS-BOA and NanoAg-I-BOA was assessed against test cariogenic bacteria by planktonic and biofilm bacterial cells growth inhibition. Results The average levels of test cariogenic bacteria in saliva decreased about 2 to 70 fold (30.9-98.4%) compared to baseline depending on the microorganism type and test BOA. Biofilm inhibition analysis demonstrated that NanoAg-I-BOA and NanoAg-IS-BOA inhibited the biofilm of all test bacteria by 20.1 to 79.9% compared to BOA. NanoAg-IS-BOA had a strong anti-biofilm effect against S. mutans, S. sobrinus and L. casei. However, NanoAg-I-BOA showed only slight antibiofilm effects on test bacteria. Most notably, at all period of the clinical trial, NanoAg-IS-BOA showed a higher antibacterial activity than NanoAg-I-BOA. Conclusion Based on the novel data that presented here, the NanoAg-IS-BOA had strong antimicrobial activity in the planktonic phase and subsequent biofilm formation of the cariogenic bacteria. Clinical significance Wearing of NanoAg-IS-BOA has the potential to minimize dental plaque formation and caries during orthodontic treatment. How to cite this article Ghorbanzadeh R, Pourakbari B, Bahador A. Effects of Baseplates of Orthodontic Appliances with in situ generated Silver Nanoparticles on Cariogenic Bacteria: A Randomized, Double-blind Cross-over Clinical Trial. J Contemp Dent Pract 2015;16(4):291-298.

scholarly journals Coexistence of Wolbachia with Buchnera aphidicola and a Secondary Symbiont in the Aphid Cinara cedri

2004 ◽  
Vol 186 (19) ◽  
pp. 6626-6633 ◽  
Author(s):  
Laura Gómez-Valero ◽  
Mario Soriano-Navarro ◽  
Vicente Pérez-Brocal ◽  
Abdelaziz Heddi ◽  
Andrés Moya ◽  
...  
Keyword(s):  
Bacterial Genome ◽  
Pcr Amplification ◽  
Bacterial Cells ◽  
Buchnera Aphidicola ◽  
Rdna Genes ◽  
16S Ribosomal Dna ◽  
Secondary Symbiont ◽  
Rdna Sequences ◽  
16S Rdna Sequences

ABSTRACT Intracellular symbiosis is very common in the insect world. For the aphid Cinara cedri, we have identified by electron microscopy three symbiotic bacteria that can be characterized by their different sizes, morphologies, and electrodensities. PCR amplification and sequencing of the 16S ribosomal DNA (rDNA) genes showed that, in addition to harboring Buchnera aphidicola, the primary endosymbiont of aphids, C. cedri harbors a secondary symbiont (S symbiont) that was previously found to be associated with aphids (PASS, or R type) and an α-proteobacterium that belongs to the Wolbachia genus. Using in situ hybridization with specific bacterial probes designed for symbiont 16S rDNA sequences, we have shown that Wolbachia was represented by only a few minute bacteria surrounding the S symbionts. Moreover, the observed B. aphidicola and the S symbionts had similar sizes and were housed in separate specific bacterial cells, the bacteriocytes. Interestingly, in contrast to the case for all aphids examined thus far, the S symbionts were shown to occupy a similarly sized or even larger bacteriocyte space than B. aphidicola. These findings, along with the facts that C. cedri harbors the B. aphidicola strain with the smallest bacterial genome and that the S symbionts infect all Cinara spp. analyzed so far, suggest the possibility of bacterial replacement in these species.

Development of a Direct In Situ PCR Method for Detection of Specific Bacteria in Natural Environments

1998 ◽  
Vol 64 (4) ◽  
pp. 1536-1540 ◽  
Author(s):  
Katsuji Tani ◽  
Ken Kurokawa ◽  
Masao Nasu
Keyword(s):  
Alkaline Phosphatase ◽  
Single Cell ◽  
Natural Environments ◽  
Single Cell Level ◽  
Bacterial Cells ◽  
Cell Level ◽  
In Situ Pcr ◽  
Glass Slides ◽  
Pcr Products

ABSTRACT We applied HNPP (2-hydroxy-3-naphthoic acid-2′-phenylanilide phosphate) to direct in situ PCR for the routine detection of specific bacterial cells at the single-cell level. PCR was performed on glass slides with digoxigenin-labeled dUTP. The digoxigenin-labeled PCR products were detected with alkaline phosphatase-labeled antidigoxigenin antibody and HNPP which was combined with Fast Red TR. A bright red fluorescent signal was produced from conversion to HNP (dephosphorylated form) by alkaline phosphatase. We used the ECOL DNA primer set for amplification of ribosomal DNA of Escherichia coli to identify cells specifically at the single-cell level in a bacterial mixture. High-contrast images were obtained under an epifluorescence microscope with in situ PCR. By image analysis,E. coli cells in polluted river water also were detected.

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