Journal: Letters in Applied Microbiology

Article Title: Quantifying dental biofilm growth using cross-polarization optical coherence tomography

doi: 10.1111/j.1472-765X.2012.03243.x

Figure Lengend Snippet: Cross-Polarization OCT images of the microcosms after 48 hours of growth on (top) hydroxyapatite, (middle) silorane based composite, (bottom) methacrylate based composite. The double arrow demarcation shows the boundary between the biofilm and the material. The scale bars are 500 μm in optical depth or roughly ~385 μm in biofilm depth. The arrow (middle image) shows a highly reflecting water layer that causes some crosstalk into the cross polarization channel.

Article Snippet: This experiment evaluated biofilm growth on discs of three different materials (n=12 each): hydroxyapatite (HA, Clarkson Chromatography), methacrylate based composite (Z100, 3M), and silorane based composite (LS, 3M).

Techniques:

Journal: Nutrients

Article Title: Antimicrobial Activity of EPA and DHA against Oral Pathogenic Bacteria Using an In Vitro Multi-Species Subgingival Biofilm Model

doi: 10.3390/nu12092812

Figure Lengend Snippet: Maximum projection of images obtained by confocal laser scanning microscopy (CLSM) of the 72 h biofilms, where the growth of these biofilms was observed on the surfaces of the hydroxyapatite discs after 60 s of exposure: ( A ) to the negative control (phosphate buffer saline); ( B ) to the ethanol solution; ( C ) to the docosahexaenoic acid (DHA) extracts (100 μM concentration) and ( D ) to 0.2% chlorhexidine. Specimens were stained with the LIVE/DEAD ® BacLightTM Bacterial Viability Kit solution, containing SYTO 9 and Propidium Iodide nucleic acid stains. Cells with a compromised membrane that are considered to be dead or dying were stain red (PI), whereas cells with an intact membrane were stain green (SYTO9).

Article Snippet: Sterile calcium hydroxyapatite (HA) discs, of 7 mm of diameter and 1.8 mm (standard deviation, SD = 0.2) of thickness (Clarkson Chromatography Products, Williamsport, PA, USA), were coated with treated saliva for 4 h at 37 °C in sterile plastic tubes, and then placed in the wells of a 24-well tissue culture plate (Greiner Bio-one, Frickenhausen, Germany).

Techniques: Confocal Laser Scanning Microscopy, Negative Control, Saline, Concentration Assay, Staining, Membrane

Journal: Nutrients

Article Title: Antimicrobial Activity of EPA and DHA against Oral Pathogenic Bacteria Using an In Vitro Multi-Species Subgingival Biofilm Model

doi: 10.3390/nu12092812

Figure Lengend Snippet: Scanning electron microscopy (SEM) of biofilms with an evolution of 72 h in hydroxyapatite (HA) discs treated with the negative control: phosphate buffer saline (PBS) ( A ), with docosahexaenoic acid (DHA) at 100 µM ( B ), with EtOH ( C ) or with the positive control: 0.2% chlorhexidine (CHX)( D ). A dense bacterial population could be observed on the HA discs treated with PBS ( A ), forming discontinuous layers of bacteria bonded to the discs. Meanwhile, on the biofilms of the discs treated with DHA ( B ), a lower density of cells distributed across the surface of the disc could be seen, and some of these exhibited structural damages. Likewise, on the discs treated with EtOH ( C ) or CHX ( D ), a reduction in the bacterial density present on the surface of the disc could also be observe, although it was lower than that on the discs treated with DHA ( B ). Chains of Aggregatibacter and/or Streptococcus (blue arrow) and fusiform bacilli of the F. nucleatum genus (yellow arrow) could be identified. Magnification ( A – D ): 1500×. The samples were dried by critical points and coated with gold by sputtering.

Article Snippet: Sterile calcium hydroxyapatite (HA) discs, of 7 mm of diameter and 1.8 mm (standard deviation, SD = 0.2) of thickness (Clarkson Chromatography Products, Williamsport, PA, USA), were coated with treated saliva for 4 h at 37 °C in sterile plastic tubes, and then placed in the wells of a 24-well tissue culture plate (Greiner Bio-one, Frickenhausen, Germany).

Techniques: Electron Microscopy, Negative Control, Saline, Positive Control, Bacteria

Journal: Nutrients

Article Title: Antimicrobial Activity of EPA and DHA against Oral Pathogenic Bacteria Using an In Vitro Multi-Species Subgingival Biofilm Model

doi: 10.3390/nu12092812

Figure Lengend Snippet: Maximum projection of images obtained by confocal laser scanning microscopy (CLSM) of the 72 h biofilms, where the growth of these biofilms was observed on the surfaces of the hydroxyapatite discs, stained with LIVE/DEAD ® BacLightTM Bacterial Viability Kit, after 60 s of exposure: ( A ) to the negative control (phosphate buffer saline); ( B ) to the ethanol solution; ( C ) to the docosahexaenoic acid (EPA) extracts (100 μM concentration) and ( D ) to 0.2% chlorhexidine. Specimens were stained with the LIVE/DEAD ® BacLightTM Bacterial Viability Kit solution, containing SYTO 9 and Propidium Iodide nucleic acid stains. Cells with a compromised membrane that are considered to be dead or dying were stained red (PI), whereas cells with an intact membrane were stained green (SYTO9).

Article Snippet: Sterile calcium hydroxyapatite (HA) discs, of 7 mm of diameter and 1.8 mm (standard deviation, SD = 0.2) of thickness (Clarkson Chromatography Products, Williamsport, PA, USA), were coated with treated saliva for 4 h at 37 °C in sterile plastic tubes, and then placed in the wells of a 24-well tissue culture plate (Greiner Bio-one, Frickenhausen, Germany).

Techniques: Confocal Laser Scanning Microscopy, Staining, Negative Control, Saline, Concentration Assay, Membrane

Journal: Nutrients

Article Title: Antimicrobial Activity of EPA and DHA against Oral Pathogenic Bacteria Using an In Vitro Multi-Species Subgingival Biofilm Model

doi: 10.3390/nu12092812

Figure Lengend Snippet: Scanning electron microscopy (SEM) of biofilms with an evolution of 72 h in hydroxyapatite (HA) discs treated with the negative control: phosphate buffer saline (PBS) ( A ), with docosahexaenoic acid (EPA) at 100 µM ( B ), with ethanol ( C ) or with the positive control: 0.2% chlorhexidine (CHX)( D ). A dense bacterial population could be observed on the HA discs treated with PBS ( A ), forming discontinuous layers of bacteria bonded to the discs. Meanwhile, on the biofilms of the discs treated with EPA ( B ), a lower density of cells distributed across the surface of the disc could be seen, and some of these exhibited structural damages. Likewise, on the discs treated with EtOH ( C ) or CHX ( D ), a reduction could also be observed in the bacterial density present on the surface of the disc, although this reduction was slighter than that on the discs treated with EPA ( B ). Chains of Aggregatibacter and/or Streptococcus (blue arrow) and fusiform bacilli of the F. nucleatum genus (yellow arrow) could be identified. Magnification ( A – D ): 1500×. The samples were dried by critical points and coated with gold by sputtering.

Article Snippet: Sterile calcium hydroxyapatite (HA) discs, of 7 mm of diameter and 1.8 mm (standard deviation, SD = 0.2) of thickness (Clarkson Chromatography Products, Williamsport, PA, USA), were coated with treated saliva for 4 h at 37 °C in sterile plastic tubes, and then placed in the wells of a 24-well tissue culture plate (Greiner Bio-one, Frickenhausen, Germany).

Techniques: Electron Microscopy, Negative Control, Saline, Positive Control, Bacteria

Journal: Theranostics

Article Title: Quantitative chemical imaging of breast calcifications in association with neoplastic processes

doi: 10.7150/thno.43325

Figure Lengend Snippet: Calibration process to determine carbonate content in hydroxyapatite. A) SRS spectra of hydroxyapatite (blue) and carbonated hydroxyapatite (red) controls. B) Calibration curve correlating ratio of peaks at carbonate and phosphate Raman transitions.

Article Snippet: Calcium hydroxyapatite (HAP) and 10% carbonated hydroxyapatite (CHAP) were obtained from Sigma Aldrich and Clarkson Chromatography Products respectively.

Techniques:

Journal: Theranostics

Article Title: Quantitative chemical imaging of breast calcifications in association with neoplastic processes

doi: 10.7150/thno.43325

Figure Lengend Snippet: Quantification of carbonate content in hydroxyapatite (HAP) based on control samples. A) Image at phosphate Raman transition (960 cm -1 ) for pure HAP. B) Image at phosphate Raman transition (960 cm -1 ) for 10% carbonated hydroxyapatite (CHAP). C) Carbonate content map for HAP. D) Carbonate content map for 10% CHAP.

Article Snippet: Calcium hydroxyapatite (HAP) and 10% carbonated hydroxyapatite (CHAP) were obtained from Sigma Aldrich and Clarkson Chromatography Products respectively.

Techniques: Control