Studies of kinetics and thermodynamic parameters of cashmere dyeing with bio-preparation of Urtica Cannabina L,

In this study, dyeing Mongolian cashmere with bio-preparation extracted from Urtica cannabina L. was investigated. Dyeing experiments were carried out under varying pH, temperature and contact time. The results have been used to investigate the kinetic and thermodynamic parameters of dyeing cashmere. This process is pH dependent and it has been found that the most suitable condition is pH 4.5. Increase in adsorption capacity with increase in temperature indicates that the dyeing process is endothermic. Thermodynamic parameters like standard affinity (∆µ), standard enthalpy (∆H) and standard entropy (∆S) were evaluated

Fatty acids and their esters from Cicuta virosa L.

n-Hexane and chloroform fractions of aerial parts and roots of Cicuta virosa L. were investigated by GC-MS. As a result of the study 25 fatty acids and their esters have been identified. Two unsaturated esters such as linoleic acid ethyl ester (IX, 16.66%), and n- hexadecanoic acid ethyl ester (VII, 10.12%), the fatty acid n-hexadecanioc acid (VI, 8.10%) made up the bulk of the aerial parts. Four unsaturated esters such as linoleic acid ethyl ester (IX, 10.15%), dibutylphthalate (XII, 9.55%), n-hexadecanoic acid ethyl ester (VII, 8.19%) and 9, 12, 15 - octadecatrienoic acid ethyl ester (X, 5.9%), two fatty acids as n-hexadecanoic acid (VI, 8,15%) and 9,12-octadecadienoic acid (VIII, 4,5%) predominated in the roots of Cicuta virosa L. These known fatty acids and their esters were found for the first time in this plant species. DOI: http://dx.doi.org/10.5564/mjc.v14i0.203 Mongolian Journal of Chemistry 14 (40), 2013, p71-7

Alkaloids from cultivated plant of Peganum harmala L.

Alkaloids such as 1H-cyclopenta(b) quinoline, 2.3.5.6.7.8-hexahydro-9-amino-; Vasicinone(1H-Pyrrоlo[2.1-b]quinazolin-9-one,3-hydroxy-2.3-dihydro) and harmine were isolated from cultivated plant of P. harmala. Four unknown alkaloids were isolated from P. harmala for the first time: 2.2.6.6-Tetramethyl-4-piperidone., Quinoline, 2.3.4-trimethyl-., Pyridine, 2-phenoxy-4- amino- and 4-(3-Propynyloxy)- quinazoline. Their structures were determined by GC-MS.DOI: http://dx.doi.org/10.5564/mjc.v12i0.184 Mongolian Journal of Chemistry Vol.12 2011: 113-11

Chromane derivatives from underground parts of Iris tenuifolia and their in vitro antimicrobial, cytotoxicity and antiproliferative evaluation

Phytochemical investigation of the ethanol extract of underground parts of Iris tenuifolia Pall. afforded five new compounds; an unusual macrolide termed moniristenulide (1), 5-methoxy-6,7-methylenedioxy-4-O-2′-cycloflavan (2), 5,7,2′,3′-tetrahydroxyflavanone (3), 5-hydroxy-6,7-dimethoxyisoflavone-2′-O-β-d-glucopyranoside (9), 5,2′,3′-dihydroxy-6,7-dimethoxyisoflavone (10), along with seven known compounds (4–8, 11–12). The structures of all purified compounds were established by analysis of 1D and 2D NMR spectroscopy and HR-ESI-MS. The antimicrobial activity of the compounds 1–3, 5, 9, and 10 was investigated using the agar diffusion method against fungi, Gram-positive and Gram-negative bacteria. In consequence, new compound 3 was found to possess the highest antibacterial activity against Enterococcus faecalis VRE and Mycobacterium vaccae. Cell proliferation and cytotoxicity tests were also applied on all isolated compounds and plant crude extract in vitro with the result of potent inhibitory effect against leukemia cells. In particular, the newly discovered isoflavone 10 was active against both of the leukemia cells K-562 and THP-1 while 4–6 of the flavanone type compounds were active against only THP-1

Cystochromones, Unusual Chromone-Containing Polyketides from the Myxobacterium Cystobacter sp. MCy9104

Seven new chromone-containing polyketides, termed cystochromones A-G, were isolated from the myxobacterial strain Cystobacter sp. MCy9104. Their structures were elucidated using comprehensive NMR spectroscopy and HR-MS/MS. Cystochromones bear a pentadecyl moiety unusually attached at C-5 of the chromone ring. Moreover, isotope-labeled substrate feeding experiments and NMR analysis suggested a hybrid iso-fatty acid and polyketide synthase biosynthetic pathway for these secondary metabolites

Unequal translingual Englishes in the asian peripheries

© 2016 Informa UK Limited, trading as Taylor & Francis Group This article seeks to expand the current discussions on the notion of ‘translingual Englishes’ by incorporating the idea of ‘unequal Englishes’ as a way of understanding the role of English in relation to understudied Asian peripheral contexts such as Mongolia and Bangladesh. It is clear that young speakers in these Asian countries are creatively involved with ‘translingual Englishes’, in which various English and other linguistic and cultural resources are in constant interplay. Yet there are also particular local constraints that either limit or expand their usage of English. Translingual Englishes may be creative and playful but they are also associated with differences in one’s unequal social class, wealth and power

Hyalachelins A–C, Unusual Siderophores Isolated from the Terrestrial MyxobacteriumHyalangium minutum

Three new siderophores, termed hyalachelins A-C (1-3), were isolated from the terrestrial myxobacterium Hyalangium minutum. Their structures were determined by 2D NMR and HR-MS/MS experiments, and their stereochemical configuration was established by a combination of NMR data, quantum mechanical calculations, and circular dichroism experiments. Hyalachelins are unusual catecholate-type siderophores that bear a 3,7,8-trihydroxy-1-oxo-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid. Their iron chelating activities were evaluated in a CAS assay showing EC50 values of similar to 30 mu