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

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

Mechanistic studies on δ-aminolevulinic acid uptake and efflux in a mammary adenocarcinoma cell line

δ-aminolevulinic acid (ALA) is the precursor in the biosynthesis of porphyrins. The knowledge of both the regulation of ALA entrance and efflux from the cells and the control of porphyrin biosynthesis is essential to improve ALA-mediated photodynamic therapy. In this work, we studied the regulation of ALA uptake and efflux by endogenously accumulated ALA and/or porphyrins in murine mammary adenocarcinoma cells. Under our set of conditions, the haem synthesis inhibitor succinyl acetone completely prevented porphobilinogen and porphyrin synthesis from ALA, and led to an increase in the intracellular ALA pool. However, neither intracellular ALA nor porphyrin pools regulate ALA uptake or efflux during the first 15 min of the process. Based on temperature dependence data, ALA but not γ-aminobutyric acid (GABA) efflux is mediated by a diffusion mechanism. Moreover, the addition of extracellular GABA not only did not influence the rate of ALA efflux but on the contrary it affected ALA uptake, showing the contribution of a saturable mechanism for the uptake, but not for the efflux of ALA from the cells. © 2003 Cancer Research UK.Fil:Correa García, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Casas, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Perotti, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Batlle, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Bermúdez Moretti, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina

δ-Aminolevulinic acid transport in murine mammary adenocarcinoma cells is mediated by beta transporters

δ-aminolevulinic acid, the precursor of porphyrin biosynthesis has been used to induce the endogenous synthesis of the photosensitiser protoporphyrin IX for photodynamic therapy in the treatment of various tumours. The aim of this work was to characterise the δ-aminolevulinic acid transport system in the murine mammary adenocarcinoma cell line LM3 using 14C-δ-aminolevulinic acid, to finally improve δ-aminolevulinic acid incorporation in mammalian cells. Our results showed that δ-aminolevulinic acid is incorporated into these cells by two different mechanisms, passive diffusion which is important at the beginning of the incubation, and active transport. Specificity assays suggested that the transporter involved in δ-aminolevulinic acid incorporation is a BETA transporter, probably GAT-2

First Observation of the Doubly Charmed Baryon Xi_cc^+

We observe a signal for the doubly charmed baryon Xi_cc^+ in the charged decay mode Xi_cc^+ --> Lambda_c^+ K- pi+ in data from SELEX, the charm hadro-production experiment at Fermilab. We observe an excess of 15.9 events over an expected background of 6.1 +/- 0.5 events, a statistical significance of 6.3sigma. The observed mass of this state is (3519 +/- 1) MeV/c^2. The Gaussian mass width of this state is 3MeV/c^2, consistent with resolution; its lifetime is less than 33fsec at 90% confidence.Comment: 5 pages, 3 figures, accepted for publication in Physical Review Letter

First observation of a narrow charm-strange meson DsJ(2632) -> Ds eta and D0 K+

We report the first observation of a charm-strange meson DsJ(2632) at a mass of 2632.6+/-1.6 MeV/c^2 in data from SELEX, the charm hadro-production experiment E781 at Fermilab. This state is seen in two decay modes, Ds eta and D0 K+. In the Ds eta decay mode we observe an excess of 49.3 events with a significance of 7.2sigma at a mass of 2635.9+/-2.9 MeV/c^2. There is a corresponding peak of 14 events with a significance of 5.3sigma at 2631.5+/-1.9 MeV/c^2 in the decay mode D0 K+. The decay width of this state is <17 MeV/c^2 at 90% confidence level. The relative branching ratio Gamma(D0K+)/Gamma(Dseta) is 0.16+/-0.06. The mechanism which keeps this state narrow is unclear. Its decay pattern is also unusual, being dominated by the Ds eta decay mode.Comment: 5 pages, 3 included eps figures. v2 as accepted for publication by PR

Observation of the Cabibbo-suppressed decay Xi_c+ -> p K- pi+

We report the first observation of the Cabibbo-suppressed charm baryon decay Xi_c+ -> p K- pi+. We observe 150 +- 22 events for the signal. The data were accumulated using the SELEX spectrometer during the 1996-1997 fixed target run at Fermilab, chiefly from a 600 GeV/c Sigma- beam. The branching fractions of the decay relative to the Cabibbo-favored Xi_c+ -> Sigma+ K- pi+ and Xi_c+ -> X- pi+ pi+ are measured to be B(Xi_c+ -> p K- pi+)/B(Xi_c+ -> Sigma+ K- pi+) = 0.22 +- 0.06 +- 0.03 and B(Xi_c+ -> p K- pi+)/B(Xi_c+ -> X- pi+ pi+) = 0.20 +- 0.04 +- 0.02, respectively.Comment: 5 pages, RevTeX, 3 figures (postscript), Submitted to Phys. Rev. Let

First Measurement of pi e -> pi e gamma Pion Virtual Compton Scattering

Pion Virtual Compton Scattering (VCS) via the reaction pi e --> pi e gamma was observed in the Fermilab E781 SELEX experiment. SELEX used a 600 GeV/c pi- beam incident on target atomic electrons, detecting the incident pi- and the final state pi-, electron and gamma. Theoretical predictions based on chiral perturbation theory are incorporated into a Monte Carlo simulation of the experiment and are compared to the data. The number of reconstructed events (9) and their distribution with respect to the kinematic variables (for the kinematic region studied) are in reasonable accord with the predictions. The corresponding pi- VCS experimental cross section is sigma=38.8+-13 nb, in agreement with the theoretical expectation sigma=34.7 nb.Comment: 10 pages, 12 figures, 4 tables, 25 references, SELEX home page is http://fn781a.fnal.gov/, revised July 21, 2002 in response to journal referee Comment