Rumput roman extract is used as a natural food preservative. Its antimicrobial activity and constituents were investigated as part of an ongoing study to evaluate its quality and safety as a food additive. The constituents were analyzed by GC/MS, and 5 major constituents were isolated and identified as capillin, capillene, caryophyllene oxide, alpha-curcumene and methyleugenol using NMR analysi...

The phytochemical constituents which comprise many edible berry fruits have increasingly been linked to modulation of biomarkers associated with conditions of diabetes, overweight/obesity, and cardiovascular disease (CVD), all components of metabolic syndrome. While many wild berries have long been valued in traditional medicine as health protective, it is only recently that the ability of berr...

The essential oils obtained by hydrodistillation from the fresh leaf and stem of Piper porphyrophyllum N.E. Br. were analyzed by GC and GC/MS. Thirty four constituents were identified in the leaf oil, while thirty eight constituents were identified in the stems oil. The most abundant components in the leaf oil included bicyclogermacrene (14.7 %), α-copaene (13.2 %) and β-phellandrene (9.5 %) wh...

Standardization of drugs means confirmation of its identity and determination of its quality and purity. At present due to advancement in the chemical knowledge of crude drugs various methods like botanical, chemical, spectroscopic and biological methods are used for estimating active constituents present in the crude drugs in addition to its physical constants. Plants have been known to reliev...

Neurotransmitters are released by synaptic vesicle exocytosis at the active zone of a presynaptic nerve terminal. In this review, I discuss the molecular composition and function of the active zone. Active zones are composed of an evolutionarily conserved protein complex containing as core constituents RIM, Munc13, RIM-BP, α-liprin, and ELKS proteins. This complex docks and primes synaptic vesi...

known. Briefly, they cause marked vaso-constriction and raise the blood pressure; they stimulate uterine contractions and are also diuretics. As opposed to this last observation, they markedly reduce the secretion of urine in the disease called diabetes insipidus. But chemical information regarding the physiologically active constituents of pituitary extracts is very meagre. Much controversy ha...

HYDRATION STATES OF METEORITE CONSTITUENTS. L. V. Moroz , M. Schmidt, U. Schade, T. Hiroi and M. A. Ivanova, German Aerospace Center (DLR), Institute of Planetary Research, Rutherford Str. 2, D12489, Berlin, Germany, [email protected], BESSY GmbH, Albert-Einstein-Str.15, Berlin, D-12489, Berlin, Germany, Department of Geosciences, Brown University, Providence, RI 02912, USA, Vernadsky Institut...

St. John’s wort (Hypericum perforatum L.) (SJW) contains numerous compounds with documented biological activity. Constituents that have stimulated the most interest include the naphthodianthrones, hypericin and pseudohypericin; a broad range of fl avonoids, including rutin, quercetin, quercitrin, miquelianin, amentofl avone, and hyperoside; and the phloroglucinols hyperforin and adhyperforin. A...