research Rosemary essential oil by hydrodistillation: SPME-GC-MS characterization
Rosemary essential oil is rich in terpenes and can be effectively extracted and analyzed using environmentally friendly methods, benefiting local economies.
Search
for
Sort by
Research
120-150 / 1000+ results research Sex steroid levels in corresponding cerebrospinal fluid and serum samples quantified by mass spectrometry in men
DHEA is the main sex steroid in cerebrospinal fluid, and testosterone in the fluid comes from the blood.
research Long-term detection of methyltestosterone (ab-) use by a yeast transactivation system
A yeast-based test can detect the steroid methyltestosterone in urine longer than traditional methods.
research Effects of Solvent System and Storage Condition on Chemical Stability of 5(alpha)-Reductase Inhibitor Compounds in Tectona grandis L.f. Leaf Extracts
Store Tectona grandis leaf extracts in slightly acidic, light-protected conditions for best stability.
research SRD5A3 Is Required for Converting Polyprenol to Dolichol and Is Mutated in a Congenital Glycosylation Disorder
Mutations in the SRD5A3 gene cause a new type of glycosylation disorder by blocking the production of a molecule necessary for protein glycosylation.
research High-performance liquid chromatographic determination of finasteride in human plasma using direct injection with column switching
New method detects finasteride in plasma quickly and accurately without clean-up.
research Simultaneous Quantification of Dexpanthenol and Resorcinol from Hair Care Formulation Using Liquid Chromatography: Method Development and Validation
Researchers created a reliable method to measure dexpanthenol and resorcinol in hair products.
research Counterfeit drugs and pharmaceutical preparations seized from the black market among bodybuilders
Many black market drugs for bodybuilders are fake and mislabeled.
research Exploring the Impact of the Microbiome on Neuroactive Steroid Levels in Germ-Free Animals
Gut microbes significantly affect brain steroid levels.
research Biosynthetic studies through feeding experiments in Eclipta prostrata (L.) L. hairy roots
The study found that in Eclipta prostrata roots, coumestans come from acetate and shikimate pathways, and phenylpropanoid is made only through the shikimate pathway.
research Non-invasive evaluation of advanced glycation end products in hair as early markers of diabetes and aging
Hair analysis can effectively detect diabetes and aging markers.
research Quantitative analysis of 34 sex (pro)hormones, conjugates and bioactive oxidation products thereof in human plasma by GC- and LC-MS/MS and systematic investigation of overestimations of analyte concentrations not accounted for by method validation
The method accurately measures sex hormones in human plasma but can have small errors.
research Fiber-Safe Extraction of Red Mordant Dyes from Hair Fibers
Researchers developed a less damaging way to extract red dyes from wool using EDTA and DMF, preserving the fiber's strength for further analysis.
research Characterization of spironolactone and metabolites derivatized using Girard's reagent P using mass spectrometry and ion mobility spectrometry
Girard's reagent P improves detection of spironolactone and its metabolites.
research Biomimetics Through Bioconjugation of 16- Methylheptadecanoic Acid to Damaged Hair for Hair Barrier Recovery
16-MHA can restore the barrier and moisture of damaged hair, making it similar to undamaged hair.
research In-Depth Exploration of Chemical Constituents from Justicia procumbens L. Through UHPLC-Q-Exactive Orbitrap Mass Spectrometry
132 compounds were found in Justicia procumbens L., including 77 new ones.
research Simultaneous RP-HPLC-DAD determination of dansyl amino acids in chemically treated human hair
A new method accurately measures amino acids in treated hair, showing bleaching reduces amino acids while protein treatments increase them.
research Autophagy protects murine preputial glands against premature aging, and controls their sebum phospholipid and pheromone profile
Autophagy prevents early aging and maintains lipid and pheromone balance in mouse glands.
research Comparative Analysis of Differential Metabolites in Panax quinquefolius From China and the United States Using UPLC‐Orbitrap‐MS and LC‐MS/MS
American and Chinese ginseng have distinct metabolic profiles that help identify their origin.
research STABILITY-INDICATING MICELLAR ELEKTROKINETIC CHROMATOGRAPHY METHOD FOR DETERMINATION OF FINASTERIDE IN PHARMACEUTICAL PREPARATIONS
Method accurately measures finasteride concentration in medicine.
research Inhibition of 3‐methylcrotonyl‐CoA carboxylase explains the increased excretion of 3‐hydroxyisovaleric acid in valproate‐treated patients
Valproic acid treatment increases a specific acid in urine by blocking an enzyme, possibly causing skin rash and hair loss.
research Simultaneous determination of multi-class active pharmaceutical ingredients by UHPLC-HRMS
A new method was developed to accurately detect and measure 47 different drug ingredients in various products.
research High-resolution mass spectrometric investigation of the phase I and II metabolites of finasteride in pig plasma, urine and bile
Finasteride metabolites found in pigs match human studies, making pigs a valid model for human drug research.
research Investigation by Imaging Mass Spectrometry of Biomarker Candidates for Aging in the Hair Cortex
Certain molecules in hair change with age and could be used for cosmetic treatments.
research Quantitative Determination of α-Tocopherol and α-Tocopheryl Acetate in Pharmaceutical and Supplementary Soft Capsules by High Performance Liquid Chromatography
The method accurately measures vitamin E compounds in capsules.
research Isotopic Abundance Ratio Analysis of the Consciousness Energy Healing Treated Flutamide using LC-MS and GC-MS Spectrometry
Energy healing treatment improved flutamide's solubility and stability, potentially enhancing its effectiveness for prostate cancer.
research Altered Hormone and Bioactive Lipid Plasma Profile in Rodent Models of Polycystic Ovarian Syndrome Revealed by Targeted Mass Spectrometry
Rodent models of PCOS show some hormone changes similar to humans, but also have key differences.
research Method development and estimation of minoxidil by gas chromatography
A new method using gas chromatography effectively measures minoxidil in drugs and biological samples.
research Matrix Effect in Quantitative LC/MS/MS Analyses of Biological Fluids: A Method for Determination of Finasteride in Human Plasma at Picogram Per Milliliter Concentrations
Method detects finasteride in plasma at very low concentrations.
research Analysis of Lipids in the Medulla of Japanese Hair and Their Function
Lipids in Japanese hair help maintain glossiness and structure.