To unravel the dissolution mechanisms of olivine by a rock-inhabiting fungus we determined the stable isotope ratios of Mg on solutions released in a laboratory experiment. We found that in the presence of the fungus Knufia petricola the olivine dissolution rates were about seven-fold higher (1....

A large dataset of minor elements (Ni, Mn, Co, Zn, Ca, Ti, Al, Cr and Na) in olivines from orogenic peridotites is reported to investigate the application of these elements as sensitive tracers of mantle processes in subduction zones. Orogenic mantle peridotites can be distinguished from crustal...

A sensitive and credible high performance liquid chromatography hyphenated to mass spectrometry (HPLC–MS/MS) was established to quantify the concentration of gracillin in rat plasma. The plasma samples were subjected to a direct protein precipitation process with acetonitrile as a precipitant i...

The isomers and conformers of push–pull 3-fluorophenylamino-2-acetyl propenenitrile (FH4C6)NHCHC(CN)(COCH3) (FPAAPN) have been studied experimentally by NMR and vibrational spectroscopy and theoretically by ab initio calculations at MP2 and DFT B3LYP levels in various basis sets. The IR and Ram...

Two new theonellapeptolide-related cyclic depsipeptides (1 and 2) have been isolated from an Okinawan marine sponge Theonella sp. and the structures were elucidated on the basis of the 2D NMR data, PSD analysis of MALDI-TOFMS, and chemical means. Compound 1 was a theonellapeptolide congener poss...

Gel filtration on Sephadex G-10 and Bio-Gel P-2 and ion retardation on a Resin AG 11A8 were applied to desalting Cottage cheese whey.Gel filtration revealed difficulties when protein and lactose were collected. Lactose was not separated from calcium salts because of their similar elution volumes...

The separation of albumin from salts and buffers by AG 11A8 ion-retardation resin was studied as a function of column length, ion load, flow rate, and resin regeneration. These operating conditions affected the retardation of the low molecular weight ions and, thus, improved the separation from ...

The use of the “snake in a cage” amphoteric ion-exchange resin Retardion 11A8 for various separations of inorganic ions was investigated.Clean separations of Ga(III)In(III)Tl(III), Pt(II)Pd(II), and Na(I)Ni(II)Cu(II)Zn(II) mixtures have been achieved. In acidic media, in which the ...

To find commercially available ion exchange resins comparable to a strong-base anion exchange resin Diaion MA03SS, which is specialized for the separation of sulfuric acid and sugars in concentrated sulfuric acid hydrolysates of non-food biomass by means of a simulated moving bed (SMB) chromatog...

A new preparation of β-hydroxyazo compounds and regioselectivities on their oxidation to β-hydroxyazoxy compounds have been described. A new synthesis of antifungal antibiotic maniwamycin A and the first synthesis of maniwamycin B by using this methodology have been also described.

Jietacins, an azoxy antibiotic class of chemicals, were isolated from the culture broth of Streptomyces sp. KP-197. They have a unique structural motif, including a vinyl azoxy group and a long acyclic aliphatic chain, which is usually branched but non-branched in the case of jietacin C. During ...

Jietacin compounds are known to display potent nematocidal activity being 10-fold more active against the pine wood nematode (Bursaphelenchus lignicolus) than avermectin B1a. They consist of a unique functional vinylazoxy group. Herein, we disclose not only the isolation of novel analogs (jietac...

Deregulation of NF-κB plays an important role in various diseases by controlling cell growth, inflammation, the immune response, and cytokine production. Although many NF-κB inhibitors have been developed, to the best of our knowledge, none of them have been successfully translated into clinic...

Publisher SummaryThe reaction covered by this article is ceramide + phosphatidylethanolamine → 1-O-acylceramide + lysophosphatidylethanolamine. The emergence of ceramide as a potentially important cellular messenger has led to a renewal of attention in the metabolism of this lipid. This interes...

The sim fruit (Rhodomyrtus tomentosa) has long been used in folk medicine to treat diarrhoea, dysentery, and to boost the immune system. The purpose of this work was to determine its phenolic profile and to evaluate the changes of content during maturation, as well as the variations induced by e...

The coumarin CM-c2, from Cnidium monnieri, 7-methoxy-8-(3-hydroxy-3-methylbut-1-enyl) coumarin, has been synthesized by palladium acetate-catalysed condensation of 7-methoxy-8-iodocoumarin with 2-methylbut-3-en-2-ol. Its stereochemistry follows from its conversion to trans-dehydroosthol. The ide...

The pharmacokinetic and pharmacodynamic behaviour of drugs and the interacting biomolecules are highly influenced by their species-specific physico-chemical properties. The first of such bio-relevant, structure-dependent properties were the species-specific acid-base constants and the co-depende...

A stereoselective method has been elaborated for the synthesis of oxime esters, (-)-4a, b, from which, as common intermediates, (+)-apovincaminic acid esters (3a,b), (+)-vincamine (1) and (-)-vincamone (2) can be prepared.

The enantioselective heterogeneous catalytic hydrogenation of isophorone in the presence of apovincaminic acid ethyl ester was investigated. Various Pd black catalysts differing in their preparation method were studied. The catalysts were characterized by different methods such as physical adsor...

The effect of various active layer thicknesses (approximately 66, 80 and 90 nm) was studied on the electrical properties of a vanadyl 3,10,17,24-tetra-tert-butyl-1,8,15,22-tetrakis(dimethylamino)-29H,31H-phthalocyanine (VTP)-based capacitive humidity sensor. Along with that, characterization of ...