Autor: DG. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Correlations between fragmentation of farms in the Republic of Moldova and its impact on farm incomes compared to Poland and Romania
Autorzy:: Popa, D.G.
Dinu, T.A.
Powiązania:: https://bibliotekanauki.pl/articles/29432304.pdf
Data publikacji:: 2015
Wydawca:: Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Źródło:: Zeszyty Naukowe Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie. Problemy Rolnictwa Światowego; 2015, 15[30], 4; 166-179
2081-6960
Pojawia się w:: Zeszyty Naukowe Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie. Problemy Rolnictwa Światowego
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Temporal patterns of pollen shedding for longleaf pine (Pinus palustris) at the Escambia Experimental Forest in Alabama, USA
Autorzy:: Chen, X.
Brockway, D.G.
Guo, Q.
Powiązania:: https://bibliotekanauki.pl/articles/2078205.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:: accumulated air temperature
accumulated pollen density
peak pollen shedding
pollen phenology
power-law
Opis:: Longleaf pine is an important tree species in the southeastern United States and studying the temporal patterns of pollen shedding is crucial to a better understanding of its phenology and seed production. In this study, field observation data on the timing of pollen shedding from 1958 to 2013 were analyzed with reference to local weather conditions. Our results indicated that the time of peak pollen shedding after January 1 (TPPS) ranged from 53 days (about February 22) to 95 days (around April 5). There was no significant trend of decreasing TPPS. The number of days with the maximum air temperature above 0 °C was close to the TPPS. The accumulated maximum daily air temperature for the TPPS approximated an average of 1,342 °C. The TPPS declined with an increase in the average air temperature during winters. The time of 80% accumulated pollen density (TAPD) varied from 5 to 32 days, with an average of 13 days. Taylor’s power-law was evident in the TAPD data, with the time group of 10–15 days having an interval time of 2 years. Winter weather was not correlated with the TAPD. These results provide new information concerning the pollen phenology for longleaf pine trees
Źródło:: Dendrobiology; 2020, 84; 30-38
1641-1307
Pojawia się w:: Dendrobiology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Inflow of Atlantic-origin waters to the Barents Sea along glacial troughs
Autorzy:: Matishov, G.G.
Matishov, D.G.
Moiseev, D.V.
Powiązania:: https://bibliotekanauki.pl/articles/47953.pdf
Data publikacji:: 2009
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: thermohaline
bathymetry
Atlantic-origin water
Barents Sea
water mass
circulation
climate
glacial trough
Opis:: This paper discusses the role of glacial shelf topography in the formation of general oceanological and biological mechanisms in the Barents Sea. Analysis of geomorphological data and oceanographic observations obtained on board MMBI research vessels in 2001–08 has shown that: fluxes of Atlantic-origin waters pass along glacial troughs; the inflow of Atlantic waters to the Barents Sea from the west increased from 2001t ill 2007, although this advection began to weaken in 2008; vertical and horizontal thermohaline gradients intensified during the investigated period; a warm period similar to that of the 1930s was observed in the Barents Sea at the beginning of the 21st century.
Źródło:: Oceanologia; 2009, 51, 3; 321-340
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Middle Triassic dipterid ferns from west-central Argentina and their relationship to palaeoclimatic changes
Autorzy:: Bodnar, J.
Drovandi, J.M.
Morel, E.M.
Ganuza, D.G.
Powiązania:: https://bibliotekanauki.pl/articles/20991.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:: Dipterid ferns possess robust fossil record from Mesozoic times on, and they are considered to be a reliable indicator of warm to subtropical humid or seasonal paleoclimatic conditions. In this contribution, we revised and described new samples of fossil Dipteridaceae, from the Barreal and Cortaderita formations (Sorocayense Group), Middle Triassic (Anisian–Ladinian), central-western Argentina. We found out that three species of Dictyophyllum, one of Hausmannia, and one of Thaumatopteris are present in the Sorocayense Group. We erected a new species Dictyophyllum menendezi sp. nov., which is characterized by petiolate fan-shaped fronds, rachis dividing into two arms, each one bearing 5 or 6 oblanceolate pinnae, basal lamina of adjacent pinnae fused forming a wide web, pinnae margin entire to undulate, primary veins catadromous to isodromous, secondary veins subopposite, tertiary veins subopposite to alternate, falcate or with a zig-zag pattern, dichotomizing four times to form a fine reticulate mesh of polygonal irregular areoles. Temporal changes in the diversity of Dipteridaceae were identified in Sorocayense Group. The first record and the maximum species richness occur at the top of the Barreal Formation (late Anisian) with three species. The lower member of the Cortaderita Formation (early Ladinian) presents two species. Dipteridaceae fossils are not registered in the upper member of the Cortaderita Formation (late Ladinian). An important diversification pulse of the family is registered during the late Norian–Rhaetian in other areas of Argentina (Paso Flores, Malargüe, and Atuel depocenters). The flourishing of Dipteridaceae during the late Anisian–early Ladinian and the late Norian–Rhaetian could be related to the increasing humidity episodes of the subtropical seasonal climate that prevailed during the Triassic. Furthermore, Dipteridaceae appear important in the establishment of plant communities, being part of early stages of floristic succession.
Źródło:: Acta Palaeontologica Polonica; 2018, 63, 2
0567-7920
Pojawia się w:: Acta Palaeontologica Polonica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Tandonia totevi (Wiktor, 1975) (Pulmonata: Milacidae) in Bulgaria and north eastern Greece. Redescription
Autorzy:: Schneppat, U.E.
Georgiev, D.G.
Dedov, I.K.
Wondrak, G.
Knechtle, F.
Powiązania:: https://bibliotekanauki.pl/articles/83237.pdf
Data publikacji:: 2011
Wydawca:: Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
Tematy:: Tandonia totevi
Pulmonata
Milacidae
Bulgaria
Greece
slug
anatomy
redescription
biogeography
ecology
Peloponnese
Opis:: New materials of Tandonia totevi (Wiktor, 1975) from Bulgaria have enabled the authors to prepare a detailed redescription and to distinguish the species from those from southern Greece which have been confused with T. totevi for almost 30 years. From the southern Greek Islands, the Peloponnese and the island of Euboea at least three more species need to be described and discriminated from T. totevi. The spermatophores of T. totevi from Bulgaria are described here for the first time, as is an intra-integumental glandular secreting organ of unknown function. The first description of spermatozoa of T. totevi is included. The first photographs of living specimens and the first observations on the behaviour and ecology are provided.
Źródło:: Folia Malacologica; 2011, 19, 4
1506-7629
Pojawia się w:: Folia Malacologica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Recurrent volcanic activity recorded in araucarian wood from the Lower Cretaceous Springhill Formation, Patagonia, Argentina: Palaeoenvironmental interpretations
Autorzy:: Del Fueyo, G.M.
Carrizo, M.A.
Poire, D.G.
Lafuente Diaz, M.A.
Powiązania:: https://bibliotekanauki.pl/articles/2082290.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:: Araucariaceae
Agathoxylon
volcanic eruptions
wood
Berriasian
Valanginian
South America
Opis:: This paper describes a petrified trunk collected from a conglomerate bed of the Springhill Formation (Berriasian– Valanginian) in the Estancia El Álamo locality, Santa Cruz Province, Argentina. The fossil trunk is classified within the ubiquitous genus Agathoxylon and the wood anatomy shows a close affinity to that of Araucariaceae. This Patagonian wood has a distinct combination of anatomical characteristics unique among all known species from the Jurassic and Cretaceous of Western Gondwana allowing to diagnose a new fossil taxon Agathoxylon mendezii sp. nov. Sedimentological and megafloristic proxies of the Springhill Formation suggest that Agathoxylon mendezii sp. nov. grew under a warm and wet climate, which indicates a subtropical to temperate palaeoenvironment. However, the large number of frost rings in the earlywood of this araucarian tree suggests that the palaeoenvironment at Estancia El Álamo was subjected to recurrent disturbances, most likely caused by regional continuous volcanic activity originating from volcanoes located far away to the west. This activity would have produced periodic stratospheric veils that promoted rapid decreases in surface air temperature; the wood response to such stressful conditions would have been the formation of numerous (at least five) frost rings. Although recurrent eruptions in Patagonia during the Early Cretaceous are well recorded, this study is the first to register eruptions recorded in a coniferous wood.
Źródło:: Acta Palaeontologica Polonica; 2021, 66, 1; 231-253
0567-7920
Pojawia się w:: Acta Palaeontologica Polonica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Chromatography analysis of seminal plasma proteins in buffalo semen samples with high and low cryotolerance
Autorzy:: Ivanova, M.G.
Gradinarska, D.G.
Tsvetkov, T.S.
Kirilova, I.V.
Georgiev, B.A.
Powiązania:: https://bibliotekanauki.pl/articles/2087567.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: buffalo
seminal plasma proteins
cryotolerance
HPLC
Źródło:: Polish Journal of Veterinary Sciences; 2019, 1; 11-16
1505-1773
Pojawia się w:: Polish Journal of Veterinary Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Establishment of 5-Fluorouracil-resistant canine mammary tumor cell line
Autorzy:: Zhou, B.
Zhang, D.
Pei, S.M.
Zhang, K.
Du, H.C.
Jin, Y.P.
Lin, D.G.
Powiązania:: https://bibliotekanauki.pl/articles/30283.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:: Canine mammary tumors are the most common neoplasms in intact female dogs. The surgery cannot always solve the problem, chemotherapy are recommend to these patients. However, chemotherapy could always fail because of multidrug resistance (MDR). Through stepwise increasing 5-Fluorouracil (5-FU) concentration in the culture medium, a 5-FU-resistant canine mammary tumor cell line CMT7364/5-FU was established to disclose the molecular mechanism of the drug resistance. Cell morphology, cell sensitivity to drugs, growth curves, expression of proteins, and chemo-sensitivity in vivo were compared between the parental cell line and resistant cell line. As compared it to its parental cell line (CMT7364), CMT7364/5-FU showed different morphology, cross-resistant to other chemo-drugs and a prolonged population doubling time (PDT). The drug efflux pump proteins (ABCB1 and ABCG2) in CMT7364/5-FU were up-regulated. In vivo, the similar result revealed that CMT7364/5-FU cell line was more resistant to 5-FU. In conclusion, a 5-FU-resistant canine mammary tumor cell line (CMT7364/5-FU) was successfully established, it can serve as a good model for researching the mechanism of MDR and screening effective agents to reverse drug resistance.
Źródło:: Polish Journal of Veterinary Sciences; 2017, 20, 1
1505-1773
Pojawia się w:: Polish Journal of Veterinary Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Physical characteristics of grains of maize pre-sowing treated by electromagnetic fields
Cechy fizyczne ziarna kukurydzy z roślin poddanych działaniu pola elektromagnetycznego przed siewem
Autorzy:: Cruz, D.G.
Bautista, R.Z.
Aguilar, C.H.
Pacheco, F.A.D.
Orea, A.C.
Bonilla, J.L.L.
Powiązania:: https://bibliotekanauki.pl/articles/35522.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:: physical characteristics
grain
maize grain
pre-sowing treatment
electromagnetic field
Zea mays
food quality
Opis:: Electromagnetic fields have many applications in agriculture, but much still remains to be studied to provide scientific evidence of its potential use as an alternative for improvement of food quality from plants whose seed was irradiated, especially in the physical characteristics of the product. In this study we investigated the effects of the electromagnetic fields on the physical quality of maize grain. Twelve treatments were evaluated from a combination of two maize hybrids (San Juan and San Jose) and five times of exposure to electromagnetic field (3, 6, 9, 12 and 15 minutes) plus a control (no electromagnetic treatment) in a design of randomised complete blocks with four replications. Electromagnetic treatment of the hybrid maize seeds (San Juan and San Jose), applied as a presowing treatment, modifies the physical characteristics of maize grains. It was possible to observe that there were significant differences (p≤0.01) between the experimental treatments and between the hybrids in their grain length (LG), grain width (GW) and 1000-grain weight (TGW). The hectolitric weight (HW) of the hybrids was between 69.05 and 68.98 kg hL-1, respectively. These results could have an impact on the process and quality of the tortilla that is consumed by the population; this is a function of time of exposure to electromagnetic treatment.
Pola elektromagnetyczne mają wiele zastosowań w rolnictwie, lecz konieczne są dalsze badania aby uzyskać naukowe dowody na ich potencjalne wykorzystanie jako alternatywnej metody poprawy jakości żywności otrzymywanej z roślin, których nasiona poddano ich wpływowi – szczególnie w odniesieniu do ich cech fizycznych. W prezentowanej pracy badano wpływ pola elektromagnetycznego na fizyczne cechy ziarna kukurydzy. Badania obejmowały dwanaście kombinacji – dwie hybrydy kukurydzy (San Juan and San Jose) i pięć czasów działania polem elektromagnetycznym (3, 6, 9, 12 i 15 minut) plus kombinacja kontrolna (nasiona bez traktowania polem elektromagnetycznym). Doświadczenie założono metodą bloków losowych w czterech powtórzeniach. Przedsiewne działanie polem elektromagnetycznym na nasiona hybryd kukurydzy (San Juan and San Jose) modyfikuje cechy fizyczne otrzymanego ziarna. Zaobserwowano istotne różnice (p≤0,01) pomiędzy wariantami doświadczenia oraz pomiędzy hybrydami kukurydzy w takich cechach jak długość ziaren (LG), szerokość (GW) i masa 1000 ziaren (TGW). Masa hektolitrowa (HW) ziarna tych hybryd zawierała się w przedziale od 69,05 do 68,98 kg hL-1. Otrzymane wyniki mogą mieć znaczenie w procesie produkcji oraz jakości tortilli.
Źródło:: Acta Agrophysica; 2011, 18, 1[192]
1234-4125
Pojawia się w:: Acta Agrophysica
Dostawca treści:: Biblioteka Nauki

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