1,838 research outputs found
Y su análisis estratigráfico con 3 ilustraciones
Extracto de Notas y Comunicaciones del Instituto Geológico y Minero de Españ
Komunikasi Pendek Koleksi Tumbuhan Dari Semenanjung Bomberai [Plant Collections From Bomberai Peninsula, Papua]
Eksplorasi tumbuhan dengan Metoda Pengkajian Biologi Secara Cepat (Rapid Biological Assessment) (Takeuchi dan Wiakabu 2001) telah dilakukan pada wilayah dengan batas 2°25\u27dan 2°30\u27LS dan 133°6\u27 dan 133°10\u27 BT di Desa Saengga,Kecamatan Babo, Kabupaten Teluk Bintuni.Areal eksplorasi mencakup 5 (lima) komunitas ekologi utama yakni hutan lahan pamah, hutan rawa, hutan pantai, savana dan hutan mangrove.Ketinggian tempat lokasi survei adalah 0 - 100 m di atas permukaan laut
Skin metastases of glioblastoma in the absence of intracranial progression are associated with a shift towards a mesenchymal immunophenotype: report of two cases
Change of diet of the Greenland Vikings determined from stable carbon isotope and 14C dating of their bones.
Cadmium-free Thin-Film Cu(In,Ga)Se2(In2S3) Heterophotoelements Fabrication and Properties
The method of heat treatment of metallic Cu–In–Ga layers in the N2 inert atmosphere in the presence of selenium and sulfur vapors was used to grow homogeneous films of Cu(In,Ga)(S,Se)2 alloys onto which the CdS or In2S3 films were deposited and, on the basis of these structures, the thin-film glass/Mo/p-Cu(In,Ga)(S,Se)2/n-(In2S3,CdS)/n-ZnO/Ni–Al photoelements were fabricated. The mechanisms of charge transport and the processes of photosensitivity in the obtained structures subjected to irradiation with natural and linearly polarized light are discussed. The broadband hotosensitivity of thin-film heterophotoelements and the induced photopleochroism were detected; these findings indicate that there is an interference-related blooming of the
structures obtained. It is concluded that it is possible to use ecologically safe cadmium-free thin-film heterostructures as high-efficiency photoconverters of solar radiation
SELEX RICH Performance and Physics Results
SELEX took data in the 1996/7 Fixed Target Run at Fermilab. The excellent
performance parameters of the SELEX RICH Detector had direct influence on the
quality of the obtained physics results.Comment: Contributed talk at the Fourth Workshop on RICH Detectors, June 5-10,
2002, Pylos, Greece. Accepted for publication in NIM
Study of the effectiveness of different methods of mulching potatoes (Solanum tuberosum) with cereal straw in eastern Ukraine
Received: March 19th, 2023 ; Accepted: June 16th, 2023 ; Published: July 2nd, 2023 ; Correspondence: [email protected] the conditions of global climate change, there has recently been a tendency to
worsen weather conditions during the growing season in the East of Ukraine. The significant increase
in average daily air temperatures and the uneven nature of rainfall do not meet the biological
requirements of potato plants, which leads to a decrease in their productivity. The purpose of the
research. Improve the microclimate on potato plantations by mulching them with different types
of materials. Results of research. Using wheat straw or basalt mineral wool as mulch reduces
overheating of the upper layers of the soil by 6.6–7.0° and contributes to moisture conservation.
At the same time, there is a significant decrease in temperature and relative humidity fluctuations
under the mulch layer compared to the soil surface. The use of spent mineral basalt wool for this
purpose, which was previously used as a substrate in greenhouses, solves the disposal problem.
Deterioration of soil chemical parameters and product quality was not noted. The use of nitrogen
fertilizers (urea) or microbial preparations Azotofit-r and Ecostern before mulching with wheat
straw has a positive effect on plant nutrition, which contributes to the improvement of biometric
indicators and increases the yield of potatoes by 4.2–4.7 t ha-1
. Potato mulching with zero tillage
involves planting tubers on its surface. At the same time, their contact with the soil is significantly
reduced, decreasing the supply of nutrients from it after the transition of potato plants to autotrophic
nutrition. Under these conditions, minimal tillage of the soil during its pre-planting preparation
improves the development of the root system and promotes the formation of stolons and tubers
at a certain depth. Depending on the number of technological operations, the degree of loosening of
the soil significantly affects the yield of potatoes. Its growth with minimal tillage is from 1.3 to
10.7 t ha-1 compared to zero tillage. This allows you to compensate for additional costs related to
mulching and collecting additional products. The improvement of the main economic indicators
confirms the high efficiency of mulching potatoes with wheat straw with minimal tillage. Results
were expressed as averages. Chemical composition was analyzed using analysis of variance with
P ≤ 0.05 for yield and plant height using the program of statistical analysis (SAS) v. 9.1.3
Biochemical blood parameters and level of endogenous intoxication in cows suffering from hepatopathies under heat stress
Global warming results in increased extreme weather events, including heatwaves, droughts and floods, which exceed plants’and animals’tolerance thresholds, thus posing a threat to the economy and agriculture. Under these conditions, heat stress becomes a vital problem for animal husbandry. The paper presents the study results of biochemical blood parameters and endogenous intoxication in cows suffering from hepatopathies under heat stress. Based on the calculated temperature-humidity index, it was established that during the summer season in the conditions of the Krasnodar Krai lowlands, cows are under heat stress. Using the method of paired comparisons, two groups of animals (n = 10) were formed: the first group was a healthy livestock; and the second group consisted of animals suffering from hepatic pathologies. Blood was sampled from all cows at the beginning of the experiment (the first decade of May) and at the end (the last decade of July). Laboratory tests of blood revealed that as the heat stress develops healthy cows show the increase in the protein concentration in blood, and, on the contrary, animals with hepatic pathologies demonstrate the inhibition of protein synthesis. The higher activity of aminotransferases and alkaline phosphatase in the bovine serum in the summer season when compared to the spring season was established. The study of the endogenous intoxication level dynamics in cattle during the development of heat stress, showed that in both groups the concentrations of middle molecules (ММ) increased relative to the background data: in the first group (healthy cows) MM 237 – by 11.8%, MM 254 – by 14.4%, MM 280 – by 16.9%; in the second group (cattle with liver pathology) MM 237 – by 16.9%, MM 254 – by 20.3%, MM 280 – by 33%. Thus, under heat stress, the endogenous intoxication in healthy livestock was almost 1.5 times less intense as compared to the animals suffering from hepatopathies
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