排序方式： 共有46条查询结果，搜索用时 31 毫秒
1.
M. G. Popova 《Russian Agricultural Sciences》2016,42(1):31-33
A study of micronutrient composition of twigs and needles of Dahurian larch (Larix dahurica Turcz. Ex. Trautv.), Scots pine (Pinus silvestris L.), and Siberian spruce (Picea obuvata Ledeb.) is carried out in Central Yakutia. Significant contents of phosphorus, calcium, magnesium, iron, iodine, selenium, and other macroand microelements; vitamins C, E, B1 to B6, and PP were found. However, the concentrations of them in the needles and branches were different. The content of heavy metals did not exceed the maximum permissible concentration (MPC) and was rather lower than that in the other regions of Russia. 相似文献
2.
Le Fresne S Popova M Le Vacon F Carton T 《Journal of agricultural and food chemistry》2011,59(23):12302-12308
The identification of fish species in transformed food products is difficult because the existing methods are not adapted to heat-processed products containing more than one species. Using a common to all vertebrates region of the cytochrome b gene, we have developed a denaturing high-performance liquid chromatography (DHPLC) fingerprinting method, which allowed us to identify most of the species in commercial crab sticks. Whole fish and fillets were used for the creation of a library of referent DHPLC profiles. Crab sticks generated complex DHPLC profiles in which the number of contained fish species can be estimated by the number of major fluorescence peaks. The identity of some of the species was predicted by comparison of the peaks with the referent profiles, and others were identified after collection of the peak fractions, reamplification, and sequencing. DHPLC appears to be a quick and efficient method to analyze the species composition of complex heat-processed fish products. 相似文献
3.
4.
5.
Yu. F. Kurdyukov L. P. Loshchinina Zh. P. Popova G. V. Shubitidze F. P. Kuz’michev M. V. Tret’yakov 《Russian Agricultural Sciences》2012,38(1):8-10
It is shown that the available moisture supply in the warm season of the year and quality of plant residues in soil determine
the duration of their decomposition, direction of soil microbiological processes, formation of the nutrient regime, and crop
yield. The yield of winter and spring wheat decreases with increasing same-type difficultly decomposable plant residues entering
the soil. 相似文献
6.
Popova M. B. Manakhov D. V. Kizeev A. N. Ushamova S. F. Lipatov D. N. Chirkov A. Yu. Orlov P. S. Mamikhin S. V. 《Eurasian Soil Science》2020,53(7):986-994
Eurasian Soil Science - The content and profile distribution of 137Cs in iron-illuvial dwarf and shallow-podzolic podzols (Albic Podzols) under bilberry-lichen and green-lichen-bilberry pine... 相似文献
7.
The microbial communities were studied in the modern and buried under kurgans (1st century AD) soils of solonetzic complexes on the dry steppes of the northern part of the Yergeni Upland. It was found that the changes in the numbers of microorganisms from different trophic groups and in the biomass of the fungal mycelium along the profiles of the modern and buried solonetzic chestnut soils and solonetzes do not differ significantly. The quantitative estimate of the impact of the solonetzic process on the spatial variability of the microbiological parameters of the soils was given on the basis of the ANOVA. As a rule, the values of the microbiological parameters in all the horizons of the modern and buried chestnut soils were 1.2–2.8 times higher than those in the modern and buried solonetzes. The influence of the degree of solonetzicity of the buried paleosols on the microbiological parameters manifested itself in the entire profile, though in each particular horizon it was only seen in the numbers of some particular trophic groups of microorganisms. The comparison between the mean weighted values of the microbiological parameters in the entire soil profiles (the A1 + B1 + B2 horizons) demonstrated an inverse relationship between the population density of the microorganisms utilizing easily available organic matter and the degree of solonetzicity of the buried paleosols. The maximum biomass of the fungal mycelium was found in the solonetzic chestnut paleosol; it exceeded the biomass of the fungal mycelium in the other paleosols (which did not differ significantly in that parameter from one another) by 1.5–1.6 times. 相似文献
8.
Deyan Stratev Teodora Popova Georgi Zhelyazkov Ivan Vashin Lilko Dospatliev Elitsa Valkova 《Journal Of Aquatic Food Product Technology》2017,26(7):871-879
The study was designed to assess the seasonal variations in the quality and lipid profile of mussel meat (Mytilus galloprovincialis) harvested along the Bulgarian coast of the Black Sea. The trial period lasted from June to October, and the sampling was carried out in the area of Varna Bay. Technological quality of the mussels was determined by measuring the water holding capacity (WHC) and cooking and roasting losses. Proximate composition, total aerobic plate count, and fatty acid analysis were carried out. Technological parameters and nutritional quality of the mussel meat were strongly affected by the season. During the summer, the mussels had higher mass, meat content, and meat yield (p < 0.001) compared to the early autumn, which corresponds to the lowest protein content during this season. Lipid profile showed seasonal variations in both individual and total fatty acid amounts (p < 0.001). Saturated fatty acids (SFA) had the highest content in summer, while monounsaturated fatty acids (MUFA) decreased gradually until the autumn. The content of polyunsaturated fatty acids (PUFA) reached its peak in October, contributing to the most favorable values of the nutritional indices of lipids in the early autumn. 相似文献
9.
10.