Subtraction of chromatograms coming from two different samples collected under identical conditions can highlight small variations, serving as a useful tool for visualizing differences between experimental and control groups. While the basis for this general approach has been known for decades, the technique is seldom used in modern chromatographic analysis. We report an investigation into the application of subtractive chromatographic analysis in several areas of pharmaceutical research where detection of small differences between samples is important. Our investigation found that elimination of artifacts caused by peak misalignment was often necessary, especially for extremely sharp chromatographic peaks obtained in rapid injection MISER chromatography. Alignment of individual peaks prior to subtraction, combined with fast detector sampling rates, or data interpolation in cases where this is not possible, was found to afford convenient visualization of small differences (∼1%) among samples, suggesting potential utility in high throughput screening of process adsorbents or other applications in pharmaceutical research and development.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.chroma.2016.09.025 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Benefits of Remote-Based Mindfulness on Physical Symptom Outcomes in Cancer Survivors: Systematic Review and Meta-Analysis.
JMIR Cancer
January 2025
Kulliyah of Nursing, International Islamic University Malaysia, Selangor, Malaysia.
Background: Many cancer survivors experience a wide range of symptoms closely linked to psychological problems, highlighting the need for psychological treatment, one of the most popular being mindfulness. The use of the internet has greatly increased in the last decade, and has encouraged the use of remote-based interventions to help people living with cancer access treatment remotely via devices.
Objective: The primary aim of this study was to explore the efficacy of internet-based mindfulness interventions on the physical symptoms of people living with cancer, where physical symptoms are defined as distressing somatic experiences (eg fatigue, insomnia, and pain) regardless of the underlying cause.
Teaching oral and maxillofacial pathology and oral medicine in undergraduate and postgraduate in Latin America.
Med Oral Patol Oral Cir Bucal
January 2025
Health Science Postgraduate Program State University of Montes Claros Campus Universitário Prof. Darcy Ribeiro Av. Prof. Rui Braga, s/n Vila Mauriceia, Postal Code 39401-089 Montes Claros - MG, Brazil
Background: Oral and Maxillofacial Pathology (OP) and Oral Medicine (OM) are specialties in dentistry responsible for diagnosis and management of diseases affecting the oral and maxillofacial regions, and to best of our knowledge no information about teaching of OP and OM in undergraduate and postgraduate courses in Latin America have been described. The aim of the present study was to evaluate dimensions related to the teaching of OP and OM in South America and Mexico.
Material And Methods: A structured questionnaire was elaborated and sent to 10 countries, with a professional in each country responsible for answering it.
Pros and cons of surgical versus conservative management for head and neck paraganglioma: a real-world data analysis.
Endocrine
January 2025
Centro di Ricerca e Innovazione sulle Patologie Surrenaliche, AOU Careggi, Florence, Italy.
Purpose: To compare functional deficits associated to surgery with those caused by the growth of the head and neck paragangliomas (HNPGLs).
Methods: 72 patients with HNPGLs were included. Patients were divided in group A (49 patients undergoing surgery) and group B (23 patients following a wait and see approach).
Comparing the Effects of Square, 4-7-8, and 6 Breaths-per-Minute Breathing Conditions on Heart Rate Variability, CO Levels, and Mood.
Appl Psychophysiol Biofeedback
January 2025
Department of Psychology, Brigham Young University, Salt Lake City, UT, USA.
Square and 4-7-8 breathing are popularly promoted by psychotherapists but have little empirical support. We hypothesized that breathing at 6 breaths per minute (bpm) would improve HRV, reduce blood pressure, and improve mood more than either square or 4-7-8 breathing. We also hypothesized square and 4-7-8 breathing would increase end-tidal CO (PETCO).
View Article and Find Full Text PDFAn overview of progress in establishing a diagnostic tool for non-celiac gluten sensitivity.
Expert Rev Mol Diagn
January 2025
Department of Pediatrics, Polytechnic University of Marche, Ancona, Italy.
Introduction: Non-Celiac Gluten Sensitivity (NCGS) is a common disorder characterized by symptoms resembling those of irritable bowel syndrome. In recent years there has been progress in the understanding of the pathogenic pathways and data suggest that NCGS has a distinct immunological profile that differs from celiac disease (CeD). This has fostered the search for a specific biomarker of NCGS.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!