chromatomass spectrometry
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Author(s):  
К.Б. Калинина ◽  
Н.Н. Николаев ◽  
М.В. Мичри ◽  
А.И. Ревельский

Исследованные лаковые артефакты были обнаружены при раскопках княжеского кургана хунну на могильнике Оргойтон в Забайкалье, который датируется I веком до н. э. – I веком нашей эры. Хотя захоронение было разграблено в древности, в нем были обнаружены детали колес китайской колесницы, покрытые черным лаком, а также мелкие фрагменты, возможно, осколки лаковой посуды. Технологические особенности этих разнообразных объектов были изучены путем исследования стратиграфии шлифов с помощью методов поляризационной микроскопии (ПМ) и сканирующей (растровой) электронной микроскопии в сочетании с энергодисперсионным рентгеновским микроанализом (РЭМ/ЭРМ). Состав органических материалов был изучен с помощью метода пиролитической хромато-масс-спектрометрии. В результате исследования было показано, что при создании всех предметов был использован китайский лак уруси. Поскольку лаковые деревья, сок которых служит для изготовления такого рода изделий, не произрастают в этом регионе, полученный результат дополняет имеющуюся информацию о существовании этнических контактов между Китаем и народами, проживающими в Забайкалье. После исследования археологических объектов была проведена их консервация. The studied lacquer artifacts were discovered during the excavations of the princely Hunnu burial mound at the Orgoyton burial ground in Transbaikalia, which dates back to the I century BC – I century AD and which is associated with the Asian Huns (Hunnu), in the Orgoyton burial ground on the territory of Transbaikalia. Although the burial was looted in ancient times, parts of the wheels of a Chinese chariot were found in it, covered with black lacquer, as well as small fragments, possibly fragments of lacquer ware. The technological features of these various objects were studied by studying the stratigraphy of the sections using the methods of polarization microscopy (PM) and scanning (scanning) electron microscopy in combination with energy dispersive X-ray microanalysis (SEM/ERM). The composition of organic materials was studied using pyrolytic chromatomass spectrometry. As a result of the study, it was shown that when creating all the items, Chinese urushi varnish was used. Since the lacquer trees whose sap serves for the manufacture of such products do not grow in this region, the result obtained complements the available information about the existence of ethnic contacts between China and the peoples living in Transbaikalia. After the study of archaeological sites, their conservation was carried out.


Author(s):  
Tatyana V. Cheshkova ◽  
Tatyana A. Sagachenko ◽  
Raisa S. Min ◽  
Dmitriy A. Philatov

Using physico-chemical methods of research (elemental analysis, infrared spectroscopy, selective chemical destruction of sulfide and ester bonds, chromatomass spectrometry) the influence of biodegradation processes on the composition and structure of asphaltenes of light oil at the Krapivinskoye deposit was studied. The results of comparative characteristics of initial asphaltenes and asphaltenes after biodestruction are presented. Attention is paid to studying their structural parameters and composition of fragments bound in asphaltene molecules through ester and sulfide bridges. It has been shown that microbial oxidation of asphaltenes of light oil by aboriginal soil microflora (laboratory experiment) occurs through a series of catalytic processes with formation of intermediate products of transformation – alcohols, aldehydes, ketones and fatty acids. It has been established that “grey and ether-bound” fragments in asphaltene molecules of biodegradable oil differ from “bound” compounds in the structure of the original asphaltenes with the qualitative composition of saturated and aromatic hydrocarbons and heteroatomic components


Author(s):  
I. I. Ivanova ◽  
S. F. Gnusaev ◽  
V. S. Sukhorukov ◽  
O. V. Goncharova ◽  
D. B. Kameldеnova

According to the literature, signs of mitochondrial dysfunction are found in 15–20% of children in the population. It often accompanies physical illness. The digestive tract is an energy-intensive system of organs, so violations of energy metabolism affect its functioning. The aim of this study was to determine the basal level of carnitine and its fractions in children with connective tissue dysplasia and chronic gastroduodenitis and to evaluate their dynamics after L-carnitine therapy. 77 children with this somatic pathology were examined. Depending on the presence of connective tissue dysplasia, they were divided into 2 groups – the main and the comparison group. Blood levels of total and bound carnitine were determined in all patients using liquid tandem chromatomass-spectrometry. Free carnitine was calculated as the difference between total and bound. It was found that in children with connective tissue dysplasia basal levels of total carnitine and its fractions are significantly lower than in patients of the comparison group. Carnitine and fractions increased in all children after a 30-day course of therapy with L-carnitine, reaching normal values with a reduced basal level. The degree of increase in indicators was greater in patients with initially lower levels, which was observed primarily in a group with connective tissue dysplasia. This study showed that connective tissue dysplasia in most cases is accompanied by mitochondrial dysfunction. Most patients with connective tissue dysplasia and chronic gastroduodenitis require correction of energy metabolism disorders using energy-stimulating therapy.


2017 ◽  
pp. 21-28
Author(s):  
Анна (Anna) Викторовна (Viktorovna) Безумова (Bezumova) ◽  
Сергей (Sergei) Иванович (Ivanovich) Третьяков (Tret'iakov) ◽  
Наталья (Natal'ia) Алексеевна (Alekseevna) Кутакова (Kutakova) ◽  
Елена (Elena) Николаевна (Nikolaevna) Коптелова (Koptelova)

The present study focuses on the identification of the components included in the suberin of birch bark, as well as the development of the method of intensification of hydrolysis of birch bark in the allocation of suberin.Identification suberin derived from the technical of birch bark in conditions the microwave field was conducted the method of IR-spectroscopy (IRS). In the study of the chemical composition of suberin acids using gas chromatomass spectrometry (GC/MS) revealed the following dominant acid: docosanedioic (phellogenic) acid and 22-hydroxydocosanoic (phellonic) acid.It is established that processing of birch bark in a microwave field allows 2 times to reduce the duration of process of water-alkaline hydrolysis. By the planned experiment, mathematical description of the process of hydrolysis of birch bark in conditions of microwave radiation was obtained; the influence of the main parameters was installed and the optimal conditions for suberin acids secretion were determined.  Concentration of alkali, %; power, W; duration, min were selected How were the independent variables. It is noted that the increase in alkali concentration and duration of hydrolysis leads to a positive result. On the basis of economic considerations, the optimum concentration of KOH for microwave hydrolysis is 5%, duration – 15 min, power – 600 W.  The power consumption is 37,5 kWh/kg birch bark.


2000 ◽  
Vol 34 (5) ◽  
pp. 273-275
Author(s):  
A. A. Prokopov ◽  
A. S. Berlyand ◽  
N. V. Veselovskaya ◽  
E. V. Ufimtseva ◽  
M. V. Belova ◽  
...  

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