Jupiter’s Atmosphere Holds Steady Astronomers knew that Jupiter's upper atmosphere could be strangely warm, but only now do they have global maps showing just where those hot spots are and ho...
#Features #Highlights #atmospheres #Jupiter #spectroscopy
Origin | Interest | Match
and Microwave Digestion”
Co-authors: Samuel Heckle, Michael Howe
👏 Congratulations to all awardees on their outstanding contributions to plasma spectrochemistry!
#SAS #Spectroscopy #WCPS2026 #PosterAwards #AppliedSpectroscopy
Abstract: Liquid biopsy is revolutionizing cancer management, with circulating tumor cells (CTCs), offering a transformative approach to screening, diagnosis, and treatment monitoring. However, existing CTC isolation methods relying on antigen expression or physical properties lack robustness, are operator-dependent, and suffer from automation challenges, leading to inconsistent and time-intensive analyses. A universal, unbiased methodology for CTC detection across tumor types is critically needed. Here, we present the first proof-of-concept study demonstrating the use of Fourier transform infrared (FT-IR) microspectroscopy to study cytospun blood samples coupled with a random forest (RF) classifier, for the detection of a single CTC in the blood of a lung cancer patient as confirmed via immunohistochemistry. Notably, our method utilizes glass coverslips as substrates, routinely employed in pathology departments, enabling seamless integration with histopathological analyses (e.g., staining, immunohistochemistry). Using FT-IR spectral data from in vitro growing lung cancer cells as a training model, we achieved precise CTC identification based on biochemical composition, specifically within the fingerprint region (1800 cm–1 to 1350 cm–1). This study introduces FT-IR microspectroscopy as a novel, label-free approach for CTCs detection in liquid biopsies, with the potential to redefine cancer diagnostics. By enhancing precision and accessibility in CTC identification, the clinical implementation of this methodology may represent a significant advancement in personalized oncology, offering a clinically viable tool for real-time cancer monitoring and improved patient stratification.
New from Applied Spectroscopy!
Fourier Transform Infrared Microspectroscopy as a Liquid Biopsy Tool to Detect Single Circulating Tumour Cells in the Blood of a Lung Cancer Patient
More: https://doi.org/10.1177/00037028251390565
#SAS #Spectroscopy #FTIR #Microspectroscopy #circulating #tumour #cells
to share with colleagues and friends!
👉 Register here: bit.ly/4qYwlH6
#SAS #Spectroscopy #TourSpeakerSeries #AppliedSpectroscopy
🔬 It’s the final day of @pittcon.bsky.social 2026!
Thank you to everyone who connected with SAS this week. We look forward to seeing you in Pittsburgh, PA next year!
#SAS #Spectroscopy #Pittcon #AnalyticalScience
Excellent teamwork from Wayne State University’s Fehl, Chekmenev, and @sadagurski.bsky.social, @karmanoscancer.bsky.social, @thomas-theis.bsky.social, & Southern Illinois University, Carbondale (SIUC). #AnaChem #spectroscopy
Abstract: Soil reflectance spectroscopy is a powerful tool for rapid, non-destructive assessment of soil properties and the foundation for data-driven soil science applications. However, systematic discrepancies during routine spectral measurement procedures, particularly those arising from contamination or deterioration of white reference (WR) calibration panels, may compromise spectral data stability and hinder harmonization practices across laboratories. This study investigates the impact of using a non-contaminated WR panel as a calibration target to measure soil reflectance across the visible (Vis), near-infrared (NIR), and short-wavelength infrared (SWIR) spectral regions. The study evaluates the effectiveness of an internal soil standard (ISS) Lucky Bay sand to correct discrepancies within a controlled laboratory setting. Twelve soils from the Israeli Legacy Soil Spectral Library were analyzed using a contact-probe setup that was calibrated with both a clean and a contaminated WR. The spectral correction method, based on IEEE P4005 protocols and the ISS calibration, significantly reduced spectral inconsistencies, especially in the Vis region where contamination effects were most pronounced. Results show that the ISS effectively harmonized spectra acquired under different WR conditions, reducing the modified average spectral difference stability (mASDS) measure across all samples. While ISS correction is commonly employed for cross-laboratory harmonization, our findings highlight its critical role in enhancing intra-laboratory consistency under routine operational variability. We recommend that every WR calibration process will be accompanied with ISS measurements. The continuous use of a well-maintained WR and ISS improves the reliability of soil spectral datasets and supports the long-term harmonization of soil spectral libraries.
New from Applied Spectroscopy!
Mitigating Spectral Errors from White Reference Degradation in Soil Spectroscopy
Read more: https://doi.org/10.1177/00037028251396975
#SAS #Spectroscopy #NIR #SWIR #reflectance $soil
Great conversations and exciting momentum at #Pittcon around our portable FT-NIR spectrometer for pharmaceutical applications. If you’re at Pittcon today, stop by and see the technology in action.
https://ow.ly/Tz5U50YrAum
https://ow.ly/swcK50YrB2G
#Spectroscopy
your research, and connect with the community.
🏆 Top 4 presenters receive travel support to SciX
📝 Register by March 20: bit.ly/4rdQVnN
Hosted by the Coblentz Society and the Society for Applied Spectroscopy (SAS).
#SAS #Spectroscopy #SLAM2026 #StudentsInScience #EarlyCareer #SciX
New in the #VirtualObservatory: “Massive runaway star HD 254577” by Dincel B. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/707/A50
#SupernovaRemnants #Spectroscopy #VisibleAstronomy
New in the #VirtualObservatory: “Tracing ionized gas kinematics in LBAs” by Leon Contreras A. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/707/A13
#Galaxies #Spectroscopy #Redshifted
Abstract: A small remote Raman sensor was used to measure the Raman scattering signal from clear, still water as a function of water depth (12 cm and 396 cm depth), sensor distance above the water surface (20–300 cm), and angle of incidence (0–80°) to the normal of the water surface. Under thick- and thin-sample conditions, the signal depends on either the inverse, or the inverse square, of sensor distance from the water surface, respectively. A model is derived that fits data for different sensor distances, water depths, and angles of incidence. Fits to the measured data are consistent with the known intensity of water Raman scattering and the specifications of the detection system. This manuscript provides a mathematical model that can be used to predict and evaluate the performance of remote sensors and can be expanded to account for differing experimental conditions.
New from Applied Spectroscopy!
Pathlength, Altitude and Angle of Incidence Dependence of Remote Water Raman Scattering
Read more: https://doi.org/10.1177/00037028251394346
#SAS #Spectroscopy #Remote #water #Raman #Scattering
New in the #VirtualObservatory: “ZTF SN Ia DR2 follow-up” by Alburai A. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/707/A91
#Supernovae #Photometry #VisibleAstronomy #Spectroscopy
New in the #VirtualObservatory: “XMM X-ray spectra of Proxima Centauri” by Damonte A. et al.
cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/706/A3...
#XRaySources #Spectroscopy
An Editors' Pick via #OPG_OPTCON: Battery-powered portable optical frequency comb based on a NALM mode-locked fiber laser for open-path field use https://bit.ly/3ONEPDs #ModeLockedFiberLasers #Spectroscopy💡⚛️
• Michael George – Non-invasive spectroscopy & advanced PAT/flow chemistry
• John Wasylyk – Spectroscopy aligned with Green Chemistry principles
👉 Learn more: pittcon.org/
#SAS #Spectroscopy #Pittcon #Sustainability
Abstract: Chromosome characterization is crucial in cytogenetic research and diagnostics, necessitating precise imaging methods to ensure proper analyses. The aim of this project is to identify a reliable method for chromosomal characterization that uses hyperspectral imagery of stained metaphase chromosomes using bright-field microscopy. We analyzed four hyperspectral images of stained chromosomes acquired under bright-field illumination. To address the high dimensionality of the hyperspectral hypercubes, we applied five dimension reduction algorithms based on spectral band selection to determine the most effective approach. A comparative study was conducted between five band selection methods to assess their effectiveness in chromosome characterization. The results indicate that sparse subspace clustering and multi-objective band selection are the most effective methods, outperforming the others in reducing the spectral dimensionality of the hyperspectral data, while preserving key properties essential for accurate chromosomes characterization. This study demonstrates that careful selection of spectral bands can enhance the analysis of spectral hypercubes for chromosome characterization.
New from Applied Spectroscopy!
Exploring Band Selection Methods for Enhanced Chromosomal Analysis in Hyperspectral Imaging
Read more: https://doi.org/10.1177/00037028251403574
#SAS #Spectroscopy #Hyperspectral #Band #Selection #Chromosomal #Analysis
support + a 2-year SAS membership.
📄 Submit to: info@iasa.world #IASA #Spectroscopy #StudentAwards #SciX2026 #SAS
New in the #VirtualObservatory: “Metallicities for emission line galaxies from HALO7D” by Pharo J. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/959/48
#DwarfGalaxies #VisibleAstronomy #Spectroscopy #ChemicalAbundances
[Open Access]
Impact of crystallinity on thermal conductivity of RF magnetron sputtered MoS2 thin films
2024 Jpn. J. Appl. Phys. 63 055508
iopscience.iop.org/article/10.3...
#JJAP
#physics
#Openaccess
#thermal
#conductivity
#crystallinity
#2D
#dichalcogenides
#magnetron
#spectroscopy
to share with colleagues and friends!
👉 Register here: bit.ly/4qYwlH6
#SAS #Spectroscopy #TourSpeakerSeries #AppliedSpectroscopy
Abstract: In attenuated total reflection (ATR) spectroscopy, the presence of an evanescent field penetrating the sample is generally considered crucial. However, according to wave optics, this evanescent field vanishes when the rarer medium is absorbing, and the attenuation of total reflection results from transmission into this medium. While the evanescent field may not play a significant role in this scenario, a closer examination of the relevant relationships reveals that the system's properties vary smoothly with both the angle of incidence and the imaginary part of the dielectric function. This effect can be further illustrated by comparing electric field maps and spectra for semi-infinite rarer media with those for rarer media composed of layers with thicknesses on the order of the wavelength. In the latter case, ATR spectra can be recorded well below the critical angle, where no evanescent field exists. If the layer is vacuum and the underlying semi-infinite medium is assumed to have the same refractive index but is weakly absorbing, tunneling and frustrated total reflection can be observed. Reflecting on our results, we can now define the critical angle in the presence of absorption as the point at which the real and imaginary parts of the perpendicular component of the wavevector become equal. Overall, we conclude that evanescent waves play little to no significant role. Any deviation from total reflection can be attributed to transmission through the ATR crystal-medium interface.
New from Applied Spectroscopy!
Understanding the Role of the Evanescent Field in Attenuated Total Reflection (ATR) Spectroscopy
Read more: https://doi.org/10.1177/00037028251358400
#SAS #Spectroscopy #ATR #evanescent #field #absorption
👁️Non-invasive method for molecular profiling of the human retina: #Raman #spectroscopy at the optic nerve head reveals age‑linked changes in the retina, establishing its potential as an early diagnostic tool for #ophthalmic and #neurodegenerative disease biomarkers.
www.nature.com/articles/s42...
[2025 OPEN ACCESS]
Ultrashort gain-switched pulse trains from laser diodes characterized by a single-shot up-conversion time microscope
2025 Appl. Phys. Express 18 072002
iopscience.iop.org/article/10.3...
#APEX
#OpenAccess
#Physics
#switch
#laser
#diode
#spectroscopy
#pulse
#conversion
Dinosaur Hemoglobin 🩸🦖
#dinosaurs #bloodbank #paleontology #spectroscopy #biology #history #biochemistry #fossils #blood
#molecularbiology
cen.acs.org/biological-c...
[INVITED REVIEW : FREE ARTICLE]
Quantitative analysis of optical emission spectroscopy for plasma process monitoring
2024 Jpn. J. Appl. Phys. 63 050102
iopscience.iop.org/article/10.3...
#JJAP
#Physics
#review
#optical
#spectroscopy
#plasma
🎓 Deadline approaching! Nominations for the 2026 IASA Student Award are due March 6. Outstanding undergrad & grad students in atomic spectroscopy can present at SciX 2026 and receive ≥$500 travel support + a 2-year SAS membership. Submit: info@iasa.world
#IASA #Spectroscopy #SciX2026
"Far-field single-molecule vibrational spectroscopy and imaging" by Lu Wei et al. pubs.rsc.org/doi/D5S...
#spectroscopy
New in the #VirtualObservatory: “Keck/NIRES spectrum for CWISE J105512.11+544328.3” by Robbins G. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/958/94
#BrownDwarfs #Spectroscopy #InfraredAstronomy #YDwarfs
