A variety of lac resin samples obtained from artists' suppliers, industrial manufacturers, and museum collections were analysed using gas chromatography mass spectrometry (GCMS) and reactive pyrolysis GCMS with quaternary ammonium reagents. These techniques allowed a detailed chemical characterisation of microgram-sized samples, based on the detection and identification of derivatives of the hy...

Renal cell carcinoma (RCC) is a heterogeneous disease that is usually asymptomatic until late in the disease. There is an urgent need for RCC specific biomarkers that may be exploited clinically for diagnostic and prognostic purposes. Preoperative fasting urine and serum samples were collected from patients with clinical renal masses and assessed with ¹H NMR and GCMS (gas chromatography-mass sp...

Background: Ethnobotanical survey in the rural villages Nepal revealed that fruits of Rhus chinensis Mill. have been using for treatment diarrhea and dysentery. Objective: To evaluate antimicrobial antioxidant effects, identification chemical constituents R. chinensis. Materials Methods: Phytochemical screening was performed on hexane 70% methanolic extracts sample followed by gas chromatograph...

background pycnocycla spinosa decne. ex boiss is an aromatic plant which showed relaxant effects on isolated ileum contractions and antidiarrheal activity. thirty four components have been extracted from p. spinosa essential oil, of which several major constituents were found to show seasonal variation. objectives the aim of this work is to evaluate the diurnal variation of its oil constituents...

Considerable unexplained intersubject variability in the debrisoquine metabolic ratio (urinary debrisoquine/4-hydroxydebrisoquine) exists within individual CYP2D6 genotypes. We speculated that debrisoquine was converted to as yet undisclosed metabolites. Thirteen healthy young volunteers, nine CYP2D6*1 homozygotes [extensive metabolizers (EMs)] and four CYP2D6*4 homozygotes [poor metabolizers (...

The essential oil composition of six species of wild Cinnamomum found in Borneo was investigated. The oils were obtained from bark by hydrodistillation and the volatile chemical profile was obtained via Gas Chromatography-Mass Spectrometry (GCMS). A total of 65 volatile constituents were identified, where the essential oils of the studied specimens contained high contents of oxygenated monoterp...

This study was conducted to evaluate the diurnal effect on essential oil yield and composition of Ledum palustre L. grown in northern Inner Mongolia, China. Essential oil content and composition were determined and compared as a function of different harvesting times viz. 7:00 AM, 11:00 AM, 3:00 PM, 7:00 PM, and 11:00 PM within a day. The essential oil obtained by hydrodistillation was investig...

Abstract Background Tetracarpidium conophorum is one of the numerous folklore medicinal plants for managing diabetes but mode action and bioactive compounds responsible antihyperglycemic property are missing in literatures. This study aimed at investigating possible modes its using both in-vitro ex-vivo methods. Powdered seed (TECOSE) was extracted with methanol standard extraction procedure. G...

Objective: The aim of this study was to investigate the chemical compound antioxidant activity extract from andaliman fruit (Zanthoxylum acanthopodium DC.) and quality parameters total flavonoid determination highest activity.
 Methods: fruits were extracted using a solvent such as n-hexane, ethyl acetate 70% ethanol obtained extracts, follow 2,2-diphenyl-1-picrylhydrazyl (DPPH) method. pe...

A static headspace method of sampling coupled to a conventional instrumental analytical probe, gas chromatography mass spectrometry (GCMS), has been applied examine the volatile fraction above leaf tissue from Palicourea marcgravii, toxic Brazilian plant that causes sudden death in livestock, and two other surrogate species (Lippia alba Plectranthus spp.). 
 The unusual total ion chromatog...