Abstract: The present disclosure relates to lead ion sensors for testing, detecting and analyzing particle-containing samples for gunshot residue. The lead ion sensors include a fluorophore itself or a combination of a fluorophore and matrix material. The particle-containing samples are contacted with the lead ion sensors. Due to a presence of Pb2+ ions in a sample, a fluorescence emission is visually observed and a correlation of a presence of gunshot residue can be made. In addition, the fluorescence emission intensity can be assessed to obtain information relating to the GSR sample. Further, there is provided a device for conducting on-site testing, detecting and analyzing of particle-containing samples for gunshot residue.

Abstract: The invention relates to non-fluorescent or low-fluorescent compounds for contact with mercury ions to produce fluorescent compounds as a detector for mercury. The fluorescence produced by the contact of the non-fluorescent or low-fluorescent compounds with mercury ions has an intensity greater than the intensity produced by the contact of the non-fluorescent or low-fluorescent compounds with other metals. The fluorescent compounds may be used as sensors/detectors for mercury ions in various samples. Methods for detecting and calculating the concentration of mercury ions in samples are also disclosed.

Abstract: The present invention relates to substituted pterin compounds, their synthesis and use. In particular, the present invention relates to a new precursor compound and its analogs for synthesizing a new substituted pterin compound and its analogs. These new compounds are particularly suitable for treating molybdenum cofactor deficiency.

Abstract: The present invention relates to substituted pterin compounds, their synthesis and use. In particular, the present invention relates to a new precursor compound and its analogs for synthesizing a new substituted pterin compound and its analogs. These new compounds are particularly suitable for treating molybdenum cofactor deficiency.

Abstract: The present invention relates to substituted pterin compounds, their synthesis and use. In particular, the present invention relates to a new precursor compound and its analogs for synthesizing a new substituted pterin compound and its analogs. These new compounds are particularly suitable for treating molybdenum cofactor deficiency.

Abstract: The present invention relates to substituted pterin compounds, their synthesis and use. In particular, the present invention relates to a new precursor compound and its analogs for synthesizing a new substituted pterin compound and its analogs. These new compounds are particularly suitable for treating molybdenum cofactor deficiency.

Abstract: The present invention relates to substituted pterin compounds, their synthesis and use. In particular, the present invention relates to a new precursor compound and its analogs for synthesizing a new substituted pterin compound and its analogs. These new compounds are particularly suitable for treating molybdenum cofactor deficiency.

Abstract: The present invention relates to substituted pterin compounds, their synthesis and use. In particular, the present invention relates to a new precursor compound and its analogs for synthesizing a new substituted pterin compound and its analogs. These new compounds are particularly suitable for treating molybdenum cofactor deficiency.

Abstract: A fluorophore that forms a complex with Pb ions is disclosed. The fluorophore/lead complex fluoresces with an intensity greater than complexes formed by the fluorophore with other metals. The fluorophore may be used as a sensor/detector for lead ions in various samples. Methods for detecting and calculating the concentration of lead ions in samples are also disclosed.

Abstract: A new class of fluorophores is presented. The fluorophores include a conjugated ring system, such as a dithiolone, a pyran, and a pyrazine containing ring system. The structure is designed with the flexibility to have multiple substitution patterns. The fluorophores may be used in applications including, but not limited to, biomarker applications, pH sensors, metal sensors, and as components for molecular electronics.

Abstract: A fluorophore that forms a complex with Pb ions is disclosed. The fluorophore/lead complex fluoresces with an intensity greater than complexes formed by the fluorophore with other metals. The fluorophore may be used as a sensor/detector for lead ions in various samples. Methods for detecting and calculating the concentration of lead ions in samples are also disclosed.

Abstract: A new class of fluorophores is presented. The fluorophores include a conjugated ring system, such as a dithiolone, a pyran, and a pyrazine containing ring system. The structure is designed with the flexibility to have multiple substitution patterns. The fluorophores may be used in applications including, but not limited to, biomarker applications, pH sensors, metal sensors, and as components for molecular electronics.