fluorescent quantum dot (qd)  (Quantum Dot Inc)

Journal: Journal of Biomedical Science

Article Title: Applications of peptides in nanosystems for diagnosing and managing bacterial sepsis

doi: 10.1186/s12929-024-01029-2

Figure Lengend Snippet: Summary of peptides utilization in nano-diagnostics for bacterial sepsis

Article Snippet: Fluorescent quantum dot (QD) , A modified auto-inducing peptide (AIPq) , Pathogen capturing motif , S. aureus S. epidermidis S. saprophyticus S. haemolyticus , Capturing of bacteria followed by imaging , In vitro (binding characteristics; biofilm imaging) In vivo (localization of MRSA in mouse model) , Higher selectivity towards accessory gene regulator (AGR)-positive virulent strains of S. aureus than the mutant strain. Effective penetration and imaging of biofilm-embedded colonies. Successful in vivo imaging of MRSA in infected mice. , [ ] .

Techniques: Glycoproteomics, Bacteria, Isolation, In Vitro, Binding Assay, Modification, Imaging, In Vivo, Mutagenesis, In Vivo Imaging, Infection

Journal: Coordination Chemistry Reviews

Article Title: Zinc associated nanomaterials and their intervention in emerging respiratory viruses: Journey to the field of biomedicine and biomaterials

doi: 10.1016/j.ccr.2021.214402

Figure Lengend Snippet: Use of Zn-based nanomaterials for emerging respiratory virus detection by immunosensors.

Article Snippet: CdSe/CdS/ZnS quantum dot (QD) fluorescent , Influenza H1N1 and H3N2 , Anti-influenza A 7307 monoclonal , Fluorescence , .

Techniques: Virus, Fluorescence

Journal: Nature Communications

Article Title: Targeted delivery of nanomaterials with chemical cargoes in plants enabled by a biorecognition motif

doi: 10.1038/s41467-020-15731-w

Figure Lengend Snippet: a Representative transmission electron microscopy image of MPA-QD showing the average diameter of the QD nanoparticle core of 4.3 ± 0.2 nm ( n = 3). b Hydrodynamic diameter measured by DLS (pH 7) of MPA-QD (6.1 ± 0.5 nm, n = 4) and Chl-QD (24.5 ± 2.5 nm, n = 5). Values are means and ± indicates standard deviation. c High zeta potential of MPA-QD (−52.6 ± 4.7 mV, n = 6) and Chl-QD (−28.4 ± 3.8 mV, n = 17) that allows penetration through lipid bilayers in the cell membrane and chloroplasts. Box plot error bars represent standard deviation, boxes are the interquartile range from the first to the third quartile, and horizontal line represents the mean. Statistical comparison was performed by independent samples t -test (two tailed). *** indicates P < 0.001. d Fluorescence emission spectra of MPA-QD and Chl-QD in the range of low background fluorescence emission from leaves. e FTIR spectra of MPA-QD, β-cyclodextrin (β-CD) coated QD (CD-QD) and Chl-QD indicating successful functionalization of QD with β-CD and guiding peptide.

Article Snippet: Quantum dot (QD) fluorescence emission in a low background window allows confocal microscopy imaging and quantitative detection by elemental analysis in plant cells and organelles.

Techniques: Transmission Assay, Electron Microscopy, Standard Deviation, Zeta Potential Analyzer, Membrane, Comparison, Two Tailed Test, Fluorescence

Journal: Nature Communications

Article Title: Targeted delivery of nanomaterials with chemical cargoes in plants enabled by a biorecognition motif

doi: 10.1038/s41467-020-15731-w

Figure Lengend Snippet: a Confocal fluorescence microscopy images of isolated chloroplasts that were targeted in vivo with CdTe quantum dots functionalized with a chloroplast guiding peptide (Chl-QD). b ICP-MS elemental analysis of cadmium and tellurium in isolated chloroplasts from plant leaves exposed to Chl-QD ( n = 5) and controls ( n = 5) infiltrated with TES buffer. Scale bar, 50 μm. Box plot error bars represent standard deviation, boxes are the interquartile range from the first to the third quartile with squares as the medians, and horizontal line represents the mean. Statistical comparison was performed by independent samples t -test (two tailed). *** indicates P < 0.001.

Article Snippet: Quantum dot (QD) fluorescence emission in a low background window allows confocal microscopy imaging and quantitative detection by elemental analysis in plant cells and organelles.

Techniques: Fluorescence, Microscopy, Isolation, In Vivo, Standard Deviation, Comparison, Two Tailed Test

Journal: Nature Communications

Article Title: Targeted delivery of nanomaterials with chemical cargoes in plants enabled by a biorecognition motif

doi: 10.1038/s41467-020-15731-w

Figure Lengend Snippet: a Confocal microscopy images of Arabidopsis leaf mesophyll cells illustrating the targeted generation and scavenging of superoxide anion (detected by DHE fluorescent dye) in chloroplasts by MV-Chl-QD and Asc-Chl-QD guided by peptide recognition motifs, respectively. Scale bar, 40 µm. b Comparison between chemical and nanotechnology-based approaches for specifically increasing superoxide in chloroplasts. DHE was used as an indicator for superoxide ROS levels after 6 h. Chemicals and nanomaterials were treated at the time points specified in the legend. Box plot error bars represent standard deviation, boxes are the interquartile range from the first to the third quartile with squares as the medians, and horizontal line represents the mean. c Temporal patterns of DHE fluorescence signal intensity inside chloroplasts in leaf mesophyll cells showing the specific increase and subsequent decrease of chloroplast superoxide anion levels in plants infiltrated with MV-Chl-QD ( n = 4) at time 0 h and subsequently perfused with Asc-Chl-QD at time 3 h (purple line). A steady increase in DHE intensity was observed in leaves treated with MV-Chl-QD at time 0 h and 3 h ( n = 5) (cyan line). Leaves infiltrated with MV-Chl-QD ( n = 4) at time 0 h only (orange line) showed an increase in DHE signal that plateaus. Controls were performed for leaves infiltrated only with buffer ( n = 5) (dark gray line). Values are means and ± indicates standard deviation. Statistical comparisons were performed by one-way ANOVA based on Duncan’s multiple range test (two tailed). Lower case letters represent significance at P < 0.05. NS denotes not significant.

Article Snippet: Quantum dot (QD) fluorescence emission in a low background window allows confocal microscopy imaging and quantitative detection by elemental analysis in plant cells and organelles.

Techniques: Confocal Microscopy, Comparison, Standard Deviation, Fluorescence, Two Tailed Test