A polar diacylglycerolipid isolated from the phototrophic green alga Chlamydomonas reinhardtii 137+ (wild-type) displays chromatographic and chemical identity with the either-linked homoserine lipid 1(3),2-diacylglyceryl-(3)-O-4'(N,N,N-trimethyl)homoserine (DGTS) of the golden alga Ochromonas danica. Subcellularly, DGTS is a constituent of a fraction of thylakoid membranes purified from Chlamyd...

The essential oil of the leaves Solanium spirale Roxb. was isolated by hydrodistillation and analyzed for the first time using GC and GC-MS. Thirty-nine constituents were identified, constituting 73.36% of the total chromatographical oil components. (E)-Phytol (48.10%), n-hexadecanoic acid (7.34%), beta-selinene (3.67%), alpha-selinene (2.74%), octadecanoic acid (2.12%) and hexahydrofarnesyl ac...

The aim of this work was to study the biodiesel production from cotton seed oil by lipase produced by Pichia guilliermondii lipase, which was immobilized onto hydrophobic magnetic particles (HMPs). The optimum reaction conditions were determined for lipase dosage, methanol-to-oil molar ratio, temperature and water content. Using response surface methodology, a quadratic polynomial equation was ...

The effects of pentaand hexadecanoic acids on the population and orientational structure of p-nitrophenol, at the airlwater interface at a bulk pH of 2, have been studied by using the technique of second-harmonic generation. The results indicate that, with increasing fatty acid at the interface, (1) the population of p-nitrophenol at the airlwater interface first increases and then decreases, (...

Oleaginous microorganisms have emerged as potential sources of oils for biodiesel production. To replenish as an alternative to the vegetable oils, higher lipid accumulating strain coupled with process optimization is indispensable. In the present study, response surface methodology (RSM) based central composite design (CCD) was used for optimization of lipid content from oleaginous fungus Aspe...

It is well known that graphene (G) induces nanotoxicity towards living organisms. Here, a novel and biocompatible hydrated graphene ribbon (HGR) unexpectedly promoted aged (two years) seed germination. HGR formed at the normal temperature and pressure (120 days hydration), presented 17.1% oxygen, 0.9% nitrogen groups, disorder-layer structure, with 0.38 nm thickness ribbon morphology. Interesti...

Plants, animals, and microorganisms have all been shown to health benefits for humans. According World Health Organization, plant medicines continue be used by 80 percent of the world’s population in developing countries. Plant-derived secondary metabolites are macromolecules that biosynthesized plants a variety biological properties beneficial humans, including antiallergic, anti-inflammatory,...

This study was carried out to determine the antimicrobial activity of Psidiumguajava(PG) leavesextracts against some pathogenic microbes. The extracts of P.G leaves was fractionated and purified by preparative TLC technique, then subjected toGas Chromatography-Mass Spectroscopy (GC-MS) to identify the biologically active compounds.Thereafter, thetoxicity of the pure fractions was assessed in vi...

governerate, Egypt. Spirulina platensis was obtained from cyanobacteria Lab., Microbiology Dept., Sakha Agricultural Research Station, GC/MS analysis showed that 37 and 7 bioactive compounds A. variabilis S. were identified, respectively. Moreover, the area percentage of same compound varied according to type cyanobacteria. The major phytochemical constituents in methanol extract are Pentadecan...

The volatile compounds from various parts of Echinops ilicifolius (Compositae) such as flowers, leaves and roots obtained by hydrodistillation (HD) and headspace solid-phase microextraction (HS-SPME) methods were subsequently analysed by GC and GC/MS and compared. Thirty-seven and 20 components of the flower of E. ilicifolius were characterized, representing 99.7% and 100.0% of the total compos...