An extremely well-preserved dinosaur (Cf. Edmontosaurus sp.) found in the Hell Creek Formation (Upper Cretaceous, North Dakota) retains soft-tissue replacement structures and associated organic compounds. Mineral cements precipitated in the skin apparently follow original cell boundaries, partially preserving epidermis microstructure. Infrared and electron microprobe images of ossified tendon c...

The article presents a plasma chemical technology for processing solid fuels, using examples of bituminous and brown coals. Thermodynamic and experimental investigation of the technology was made. The technology allows producing synthesis gas from the coal organic mass and valuable components (technical silicon, ferrosilicon, aluminum, and carbon silicon, as well as microelements of rare metals...

Studi ini bertujuan untuk mempelajari pengaruh persen berat katalis dan campuran bahan terhadap yield komposisi hasil pirolisis sampah polipropilen (botol air mineral) polietilena berdensitas tinggi (tutup botol mineral). Pirolisis dilakukan dengan variasi jumlah 0, 5, 10, 15, 20 %b/b, serta 50, 60, 70, 80, 90 %b/b. Hasil cair, padat, gas tertinggi pada secara berurutan adalah 73,26; 26,4; 0,34...

Diaminopimelic acid was found to be a component of the cell wall of the Legionnaires disease bacterium, thus providing additional evidence that the organism is a bacterium. The presence of this amino acid was determined by gas-liquid chromatography and confirmed by gas chromatography-mass spectrometry.

background: organic acids refer to a family of compounds that are intermediates in a variety of metabolic pathways. many organic acids are present in urine from clinically normal individuals. elevated levels of urine organic acids cause to the organic acidurias, disorders in which some metabolic pathways in organic acid metabolism are blocked. the present work identified major and minor urinary...

Catalytic liquefaction of (Municipal sewage sludge) MSS over transition metal catalysts in ethanol-water co-solvent (EWCS) was investigated. The effect of operating parameters like temperature, holding time, and ethanol-water ratio was discussed. CuSO4 was selected as the most efficient catalyst. The highest biocrude yield (47.45%) and liquefaction conversion (97.74%) was both obtained at the s...

Lanthanum (La) and the lanthanides (Ln) are the elements, numbered 57-71 of the periodic table. La and Ln occur more frequently than their name implies.

gas chromatography (gc) and gas chromatography mass spectrometry (gc-ms) were employed to determine the chemical composition of essential oil obtained from dry fruits of carum copticum. thymol (36.7%), -terpinene (36.5%) and -cymene (21.1%) were found to be the major constituents of the oil. the anti-bacterial activities of the oil were mainly investigated against food poisoning bacteria (sal...

a combined gas chromatography–mass spectrometry (gc–ms) with headspace solid-phase microextraction (hs-spme) method has been employed for the analysis of the flavor volatiles of some iranian rice cultivars (domsiah, deylamani, hashemi, shirodi and tarom). the samples were grown in different cities of mazandaran province. the sampling procedure and chromatographic conditions were same for all sa...