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    Wyświetlanie 1-6 z 6
    Tytuł:
    Estimating body mass from the astragalus in mammals
    Autorzy:
    Tsubamoto, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/946014.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    mammalia
    astragalus
    talus
    regression analysis
    body mass estimate
    paleogene
    Opis:
    Astragalar fossils have been intensively studied as an indicator of the functional morphology and phylogenetic relation-ships of mammals. However, relatively few studies have investigated the relationship between astragalar size and body mass, usually with a focus on a particular taxonomic group. Here, univariate and multiple regression models are used to analyze the relationship between astragalar size and body mass based on an extensive sample of extant land mammals (11 orders, 48 species, 80 individuals; body mass ranging from 18 g to 3.4 t). The analyses revealed the size of the tibial trochlea to be a better predictor of body mass than the total size of the astragalus. Based on these results, estimates of the body mass of several Paleogene land mammals were calculated and compared to those of previous studies. Thus, for ex-ample, the body mass of “Baluchitherium”, the largest terrestrial mammal known to date, was estimated at about 10–15 t.
    Źródło:
    Acta Palaeontologica Polonica; 2014, 59, 2; 259-265
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Postcranial remains of basal typotherian notoungulates from the Eocene of northwestern Argentina
    Autorzy:
    Armella, M.A.
    Garcia-Lopez, D.A.
    Babot, M.J.
    Deraco, V.
    Herrera, C.M.
    Saade, L.
    Bertelli, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082173.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Mammalia
    Notoungulata
    calcaneum
    astragalus
    plantigrade
    foot stances
    Paleogene
    South America
    Opis:
    Notoungulates represent the most taxonomically diverse and temporally and geographically widespread group among South American native ungulates. Here, we analyze anatomical and systematic aspects of proximal tarsal bones recovered from the Lower and Upper Lumbrera formations (middle and late middle Eocene) in northwestern Argentina. We provide detailed descriptions, comparisons, and infer foot stances and range of movements for the taxa implicated. Material studied includes astragali belonging to the oldfieldthomasiid Colbertia lumbrerense (Lower Lumbrera Formation), a set of proximal tarsals referred as Typotheria indet. (Lower Lumbrera Formation), and tarsals (also including navicular and cuboid) of the informal taxon “Campanorco inauguralis” (Upper Lumbrera Formation). The comparison of the tarsals of Colbertia lumbrerense (middle Eocene of Argentina) with Colbertia magellanica (early Eocene of Brazil) reveals several differences including variations on the development and arrangement of articular facets, and the size of the dorsal astragalar foramen in the Argentinean species. The specimen of Typotheria indet. shows morphological affinities with basal interatheriid taxa. However, its larger size contrasting with the overall small body sizes of Eocene interatheriids precludes an indisputable taxonomic assignment. Concerning “Campanorco inauguralis”, our observations indicate that there is no morphological evidence for a close phylogenetic relationship with Mesotheriidae. It presents a “reversed alternating tarsus” condition, which is also observed in Leontiniidae, “Notohippidae”, Toxodontidae, and some typotherians. However, the spectrum of singularities exhibited by this form precludes the assessment of its relationships in the context of the Paleogene radiation of Typotheria and it is necessary to extend the comparison to Eocene notoungulates. Finally, in a morphofunctional context a plantigrade foot posture is inferred for the specimens here reported. These observations have the potential to provide functional proxies for paleoecological reconstructions to be applied to the study of the early radiation of these notoungulate faunas.
    Źródło:
    Acta Palaeontologica Polonica; 2020, 65, 2; 1-17
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Growing the endangered species Astragalus nitidiflorus in the nursery: fertilization rate affects growth, and leaf nutrient and chlorophyll contents
    Autorzy:
    Vicente, M.J.
    Martínez-Sánchez, J.J.
    Franco, J.A.
    Bañón, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/11858781.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Tematy:
    Spain
    plant cultivation
    Astragalus nitidiflorus
    endangered species
    endemic plant
    plant growth
    leaf nutrient content
    chlorophyll content
    fertilization rate
    nodulation
    Opis:
    Astragalus nitidiflorus is an endangered legume endemic to the southeast of the Iberian Peninsula. This species develops symbiotic relationships with N-fixing bacteria. However, the problem of isolating its rhizobia has not been solved. Because poor N fixation in plants can be corrected by fertilization, the effect of N-P-K fertilizers on growth, leaf chlorophyll and mineral ions was studied. Plants of A. nitidiflorus were grown in 100%-substrate with different N-P-K fertilizer rates (mg l–1): 1-1-8 (S0), 69-29-35 (SL), 144-43-131 (SM) and 245-58-235 (SH). A treatment with substrate plus soil from the natural habitat and no fertilizers (T0) was included. The reference foliar contents of N, P and K were 42.5, 3.5 and 36.5 mg g–1, respectively. Although the species did not form root nodules when grown in substrate, T0 plants produced active nodules that allowed the plants to grow properly without fertilization. In the absence of nodules, both N fertilization (~144 mg l–1) and Fe fertilization (>12 mg l–1) are vital, as is, to a lesser extent, K fertilization (~75 mg l–1 K2O). The S0 and SL reduced leaf chlorophyll, while SM prevented its degradation.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2018, 17, 4; 129-136
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Traditional Chinese herb, Astragalus: possible for treatment and prevention of COVID-19?
    Autorzy:
    Law, S.
    Lo, C.
    Han, J.
    Leung, A.W.
    Xu, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049190.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Włókien Naturalnych i Roślin Zielarskich
    Tematy:
    Astragalus
    herb
    Chinese herb
    treatment
    blood circulation
    prevention
    COVID-19
    antiinflammatory activity
    traganek
    tradycyjna chińska roślina lecznicza
    leczenie
    zapobieganie
    Opis:
    Astragalus is a traditional herb which has been used in China for a long time. It regulates blood circulation (vital energy), invigorates body fluid circulation, protects the flow of blood to fight against the attack of pathogens, and strengthens “blood deficiencies” according to Bencao Congxin. Astragalus was approved by the Food and Drug Administration in 2009 as a dietary supplement for upper respiratory infections, allergic rhinitis (hay fever), asthma, chronic fatigue syndrome, and chronic kidney disease. Thirty journals published in the past ten years were reviewed by using library search engines such as SCI/SCIE, PubMed, and Scopus. In this mini-review, we focus on the anti-inflammatory of Astragalus features, discuss the background of Astragalus and its function in various diseases from water-extracted Astragalus membranaceus, Astragalus saponins, and Astragalus polysaccharides. Based on the traditional Chinese medicine theory, Astragalus is a potential candidate to treat and prevent COVID-19.
    Źródło:
    Herba Polonica; 2020, 66, 4; 79-84
    0018-0599
    Pojawia się w:
    Herba Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Strong potential for endozoochory by waterfowl in a rare, ephemeral wetland plant species, Astragalus contortuplicatus (Fabaceae)
    Autorzy:
    Lovas-Kiss, A.
    Sonkoly, J.
    Vincze, O.
    Green, A.J.
    Takacs, A.
    Molnar, A.V.
    Powiązania:
    https://bibliotekanauki.pl/articles/56900.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    strong potential
    endozoochory
    waterfowl
    rare species
    wetland
    plant species
    Astragalus contortuplicatus
    Fabaceae
    germination
    experiment
    mallard
    seed dispersal
    seed ecology
    seed viability
    Opis:
    It was proposed previously that passive dispersal by migratory aquatic birds explain the widespread distribution of many wetland organisms. Several experimental studies have shown that many widespread wetland plant species can be readily dispersed within the guts of Anatidae. However, it is unclear whether plants with a more restricted distribution are able to disperse via waterbirds. This paper addresses the dispersal ability and germination ecology of the little-known Hungarian milkvetch Astragalus contortuplicatus, which occurs on banks of continental rivers and has a limited and unpredictable distribution. To test whether limited capacity for endozoochory by waterfowl could explain the sporadic appearance of this species, we force-fed ten captive mallards (Anas platyrhynchos) with 100 milkvetch seeds each. Droppings were collected for up to 45 h after feeding. Intact and viable seeds were found in the droppings of each mallard, and altogether 24.7% of seeds fed were recovered intact. The proportion of retrieved seeds that germinated (27.0%) was significantly higher than that of untreated control seeds (0.5%), but significantly lower than that of mechanically scarified seeds (96.0%). Retrieved seeds that germinated developed into healthy mature plants. Given the average flight velocity of mallards, seeds of A. contortuplicatus may travel up to 1600 km inside the digestive tract of migrating individuals. Our results suggest that avian vectors may be more important for the dispersal of rare higher plants (especially those with a hard seed-coat) than hitherto considered. Moreover, they suggest that rarity does not necessarily indicate limited dispersal ability, and may instead be explained by specific habitat requirements.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2015, 84, 3
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of antioxidant properties and influence on activity of collagenase and elastase of selected raw herbal materials from traditional Eastern medicine
    Badanie właściwości antyoksydacyjnych wybranych surowców zielarskich z tradycyjnej medycyny wschodniej oraz ich wpływu na aktywność kolagenazy i elastazy
    Autorzy:
    Lewandowska, Julia
    Zych, Maria
    Szałabska-Rąpała, Katarzyna
    Kaczmarczyk-Żebrowska, Ilona
    Powiązania:
    https://bibliotekanauki.pl/articles/51828656.pdf
    Data publikacji:
    2024-10-18
    Wydawca:
    Śląski Uniwersytet Medyczny w Katowicach
    Tematy:
    antioxidant properties
    polyphenols
    collagenase
    elastase
    Ocimum sanctum
    Tinospora cordifolia
    Gynostemma pentaphyllum
    Astragalus membranaceus
    Codonopsis pilosula
    Asparagus racemosus
    właściwości antyoksydacyjne
    polifenole
    kolagenaza
    elastaza
    Opis:
    INTRODUCTION: Traditional Eastern medicine (TEM) is becoming increasingly more popular in highly developed Western countries as an alternative form of supporting health and body care. Many herbs used in this medical practice possess antioxidant, anti-inflammatory and immunomodulatory effects. The skin aging process may progress with age, when collagen and elastin fibers gradually decrease. Excessive exposure to UV radiation, resulting in an increase in the production of free radicals, leads to damage at the molecular level to numerous structures in the body including the acceleration of skin aging. MATERIAL AND METHODS: The content of polyphenolic compounds (among others: phenolic acids and flavonoids), antioxidant potential (ABTS, DPPH and FRAP assays) as well as the influence on the activity of enzymes, collagenase and elastase, were determined in infusions obtained from Gynostemma pentaphyllum, Tinospora cordifolia, Astragalus membranaceus, Codonopsis pilosula, Asparagus racemosus and Ocimum sanctum. RESULTS: The highest content of polyphenolic compounds and the strongest antioxidant properties were observed in the infusions obtained from the O. sanctum herb, while the greatest ability to inhibit collagenase and elastase was observed in the infusions obtained from the T. cordifolia leaves. CONCLUSIONS: Infusions from the O. sanctum herb and T. cordifolia leaves may have a potentially beneficial effect on the skin and may be used in anti-aging formulations.
    WPROWADZENIE: Tradycyjna medycyna wschodnia (traditional Eastern medicine – TEM) zyskuje coraz większą popularność w wysokorozwiniętych krajach Zachodu jako alternatywna forma wspierania zdrowia i pielęgnacji ciała. Wiele ziół stosowanych w tej praktyce medycznej posiada działanie antyoksydacyjne, przeciwzapalne czy immunomodulujące. Proces starzenia się skóry może postępować wraz z wiekiem, kiedy stopniowo ubywa włókien kolagenowych i elastynowych. Nadmierna ekspozycja na promieniowanie UV, pociągająca za sobą wzrost produkcji wolnych rodników, prowadzi do uszkodzeń na poziomie molekularnym licznych struktur w organizmie i m.in. przyspieszenia starzenia się skóry. MATERIAŁ I METODY: W naparach otrzymanych z surowców pozyskanych z Gynostemma pentaphyllum, Tino-spora cordifolia, Astragalus membranaceus, Codonopsis pilosula, Asparagus racemosus oraz Ocimum sanctum określono zawartość związków polifenolowych (m.in. kwasów fenolowych oraz flawonoidów), potencjał anty-oksydacyjny (metodami ABTS, DPPH oraz FRAP), a także wpływ na aktywność enzymów – kolagenazy oraz elastazy. WYNIKI: Najwyższą zawartość związków polifenolowych oraz najsilniejsze właściwości antyoksydacyjne obserwowano w naparach pozyskanych z ziela O. sanctum, natomiast największą zdolność do hamowania kolagenazy i elastazy wykazywały napary pozyskane z liści T. cordifolia. WNIOSKI: Napary z O. sanctum i T. cordifolia mogą wykazywać potencjalnie korzystny wpływ na skórę, a także znaleźć zastosowanie w formulacjach stosowanych jako produkty przeciwstarzeniowe.
    Źródło:
    Annales Academiae Medicae Silesiensis; 2024, 78; 259-268
    1734-025X
    Pojawia się w:
    Annales Academiae Medicae Silesiensis
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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