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    Wyświetlanie 1-9 z 9
    Tytuł:
    Prandial and postprandial exocrine pancreatic secretion after duodenal infusion of alfa-ketoglutarate, formic acid and potassium di-formate in pigs
    Autorzy:
    Filip, R.
    Kruszewska, D.
    Valverde Piedra, J.L.
    Szymanczyk, S.E.
    Studzinski, T.
    Radzki, R.P.
    Bienko, M.
    Pierzynowski, S.G.
    Powiązania:
    https://bibliotekanauki.pl/articles/3153.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Medycyny Wsi
    Źródło:
    Journal of Pre-Clinical and Clinical Research; 2007, 01, 1
    1898-2395
    Pojawia się w:
    Journal of Pre-Clinical and Clinical Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Anisotropy, Geometric Structure and Frustration Effects in Molecule-Based Nanomagnets
    Autorzy:
    Kamieniarz, G.
    Kozłowski, P.
    Antkowiak, M.
    Sobczak, P.
    Ślusarski, T.
    Tomecka, D.
    Barasiński, A.
    Brzostowski, B.
    Drzewiński, A.
    Bieńko, A.
    Mroziński, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1426672.pdf
    Data publikacji:
    2012-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Xx
    75.10.Jm
    75.10.Pq
    75.40.Cx
    Opis:
    In this paper we review our results of comprehensive study of molecular nanomagnets recently synthesized in the form of the chromium-based molecules and bimetallic copper-containing chains as well as we present some new findings. We focus on effects of anisotropy, geometry and frustration appearing in various thermodynamic properties of the nanoscale magnets which are described by Heisenberg-like spin models and simulated by accurate numerical methods. We show that bond-dependent exchange anisotropy is needed to model magnetic torque in the Cd-doped chromium ring. We argue that only in the limit of infinite rings (n → ∞) frustration can be considered as the opposite to bipartiteness in the odd numbered (3 ≤ n ≤ 9) s = 3/2 quantum spin rings. We analyse the influence of exchange interactions and anisotropy on magnetic susceptibility of bimetallic (S = 3/2, s = 1/2) chains composed of Cu ions linked to different 3d ions by fitting experimental data. We reach the remarkable consistency of the density functional theory estimates of the magnetic couplings in $Cr_8$ molecule and provide strong support to the spin models exploited in the literature.
    Źródło:
    Acta Physica Polonica A; 2012, 121, 5-6; 992-998
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nesfatin-1 prevents negative changes in bone in conditions of developing osteopenia
    Autorzy:
    Puzio, I.
    Tymicki, G.
    Pawłowska, M.
    Bieńko, M.
    Radzki, R.P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2085429.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    nesfatin-1
    osteopenia
    osteoporosis
    ovariectomy
    rat
    DXA
    pQCT
    immunohistochemistry
    Opis:
    Objective. The aim of the study was to determine the effect of nesfatin-1 on bone properties in female rats in the conditions of developing osteopenia induced by ovariectomy (OVX). Materials and method. The experiment was performed on 21 female Wistar rats assigned to 3 groups receiving intraperitoneally physiological saline (SHO, OVX-PhS) and nesfatin-1 in dose 2 μg/kg BW of (OVX-NES) once a day for 8 wks. At the end of the experiment, the rats were scanned using the DXA method to determine the body composition, tBMC, and tBMD. The isolated femora and tibia were tested with the DXA method for BMD and BMC, and with the pQCT method for separate analysis of the cortical and trabecular bone tissue. The bone strength parameters were also determined. The immunohistochemical method was used for determination of nesfatin-1 localization in growth cartilage. Bone metabolism markers (osteocalcin, bALP, and NTx) were identified using an ELISA kit. Results. OVX exerts a negative effect on bone tissue. The nesfatin-1 administration influenced positively the DXA parameters of tibia. TvBMD and TbvBMD measured by pQCT in metaphysis of bones were significantly higher in the OVX-NES group than in OVX-PhS. No differences were found in the values of bone strength parameters between SHO and OVX-NES females. Extra- and intracellular immunohistochemical reaction for nesfatin-1 was observed in all zones of growth cartilage, with the strongest reaction detected in the calcifying zone. Nesfatin-1 administration caused a significant increase in the osteocalcin and bALP concentration in relation to the OVX-PhS animals. Conclusion. The results of the experiment indicate that nesfatin-1 exerts a protective effect on bone tissue properties and can be used in the prevention of osteoporosis.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2020, 27, 1; 66-75
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bone losses in obese, ovariectomized rats appear to be independent from sclerostin-induced inhibition of the Wnt/β-catenin pathway
    Autorzy:
    Radzki, R.P.
    Bieńko, M.
    Filip, R.
    Polak, P.
    Michalik Wolska, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2085877.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    dietary induced obesity
    bone
    sclerostin
    pQCT
    DXA
    rats
    ovariectomy
    Opis:
    Introduction. Overweight and obesity, as well as a gonadal function, are pivotal factors influencing bone tissue metabolism. Materials and method. The aim of the study was to determine the effect of dietary induced obesity (DIO) on bone tissue metabolism in sham-operated (SHO) or ovariectomized (OVX) adult female Wistar rats. Additionally, the influence of DIO in SHO or OVX on the concentration of sclerostin in the blood serum was analyzed. After SHO or OVX, the rats were placed in groups (n=8) and either received a standard diet (11.5 MJ/kg) (SHO-CON; OVX-CON) or a high-energy diet (17.6 MJ/kg) (SHO-FAT; OVX-FAT). The experiment lasted for 90 days and allowed for the establishment of osteopenia in OVX females and obesity in the rats that had received the high-energy diet. Results. The results of the study demonstrate that obesity or/and ovariectomy increases the resorption of femora and tibiae, hence decreasing the densitometric and mechanical parameters affecting the bone structure in adult females rats. The strongest osteodegenerative effect was seen in the OVX-FAT females. Interestingly, the degree of bone tissue degradation caused exclusively by ovariectomy was similar to that found in the obese sham-operated rats. Conclusions. Bone losses invoked by DIO seem to be independent from the Wnt/β-catenin pathway inhibition induced by sclerostin. While further study is necessary, the obtained results suggest that the usage of sclerostin anti-body in the treatment of osteoporosis can be ineffective, and in obese patients the undertaking of such therapy should be reassessed.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2020, 27, 3; 394-400
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Could fructan sources in strawberry matrix be more effective as a tool for improvement of bone structure than these compounds added to diet alone? - Study on osteopenic rat model
    Autorzy:
    Topolska, K.
    Radzki, R.P.
    Filipiak-Florkiewicz, A.
    Bieńko, M.
    Florkiewicz, A.
    Cieślik, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/2085394.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    ovarian hormone deficiency
    calcium intake
    fructans
    bone
    Opis:
    Introduction. Osteoporosis, a disease associated with ovarian hormone deficiency following menopause, is the most common cause of age-related bone loss. Although an optimal intake of Ca is vital – both bone accretion during growth and maintenance in adult life – a great percentage of the population consumes far below the recommended amounts of this mineral. On the other hand, there are evidences that fructans enhance not only Ca absorption, but bone calcium as well. Objective. In the knowledge that estrogen deficiency and insufficient Ca in the diet during postmenopause cause serious problems with resultant osteoporosis, the aim of this study is to assess the effects of a diet enriched in fructan-containing sources alone, or in the “strawberry matrix”, on the structure of bone in OVX rats under calcium hypoalimentation. Materials and method. Experimental animals were female Wistar rats, sham-operated or ovariectomized. The treatment with Ca-restricted diets also contained one of the sources of fructan (Jerusalem artichoke, yacon, Beneo Orafti Synergy1), in the amount providing 8% of fructans. Femur architecture of rats was assessed by tomography and Ca content by the AAS method. Results. Ovariectomy led to a significant decrease in femoral Ca content, total mineral content and bone density of rats. This study shows that a diet containing inulin-type fructan (especially as a component of strawberry product) improved bone quality (i.e. increase in Ca content in femur, total density in middle part of bone, as well as decrease of endosteal circumference) in OVX rats under calcium hypoalimentation. Conclusions. These findings suggest that a fructan-enriched diet could be potentially useful for postmenopausal osteoporosis. It is important to determine an optimal dietary level of fructan with the long-term goal of developing a dietary strategy in osteoporosis prevention.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2020, 27, 1; 19-28
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of fructan-enriched diet on bone turnover parameters in ovariectomized rats under calcium restriction
    Autorzy:
    Topolska, K.
    Bieńko, M.
    Filipiak-Florkiewicz, A.
    Radzki, R.P.
    Cieślik, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/2085720.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    fructans
    calcium dietary restriction
    bone turnover
    densitometry
    ovariectomy
    Opis:
    Introduction. Osteoporosis, the “quiet epidemic”, is one of the most serious threats to public health. It is known that estrogen plays a significant role in the regulation of bone turnover, and its loss at menopause causes osteoporosis. Added to this, insufficient calcium intake accelerates bone mass loss, increasing the risk of fractures. Objective. The study aimed to answer the question whether a fructan-enriched diet could be helpful in preventing from disturbances in bone turnover caused by calcium restriction combined with ovariectomy-induced estrogen deficiency. The differences related to the kind of fructan and “matrix effect” of fructan action (form of addition) were also evaluated. Materials and method. The study was conducted using sham-operated (control groups) or ovariectomized (OVX) rats fed a calcium restricted diet. The treatment diets contained one of three fructan sources – Jerusalem artichoke, yacon and Beneo Orafti Synergy1 – added alone or as an ingredient of strawberry sorbet, all in the amount providing 8% fructans. Analyses of biological material included: serum Ca, Mg and P concentrations, alkaline phosphatase activity (ALP), osteocalcin (OC) and C-telopeptide degradation products from type I collagen (CTX). Densitometric parameters of femora were also assayed. Results. Among markers of bone turnover, the ALP activity depended both on the kind of fructan and the form of addition. The highest value was shown in the OVX group fed a low-calcium diet, whereas administration of diet enriched with Jerusalem artichoke led to an almost 50% decrease in the value of this parameter. Dietary fructans also lowered the OC level. Feeding rats with diet containing sorbet enriched in yacon or Jerusalem artichoke resulted in a decrease of CTX, compared to the diet containing yacon alone or fructan formulation in both forms No significant differences were observed in densitometric parameters between treatment groups. Conclusions. The obtained findings suggest that fructan administration with a calcium-restricted diet might exert a positive effect on bone turnover parameters. Regarding the form of their addition, it is possible that other constituents of sorbets contributed to the fructan action. It remains open whether this impact would be significant over a longer period of time.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2020, 27, 2; 219-224
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Intervention for improvement the diet and physical activity of children and adolescents in Poland
    Autorzy:
    Wolnicka, K.
    Charzewska, J.
    Taraszewska, A.
    Czarniecka, R.
    Jaczewska-Schuetz, J.
    Bieńko, N.
    Olszewska, E.
    Wajszczyk, B.
    Jarosz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087288.pdf
    Data publikacji:
    2021
    Wydawca:
    Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
    Tematy:
    intervention
    children
    adolescents
    nutrition
    physical activity
    obesity prevention
    Opis:
    Background. The effects of a two-year educational Programme “Keep Balance” addressed to children and adolescents have been evaluated. Its purpose has been to implement the rules of proper nutrition and increasing the level of physical activity on the population level. Objective. The main objective of the evaluation was an indication if, after two years of programme activities, outcome indicators have been achieved. Material and methods. Approximately 400,000 pupils/students from 1600 educational units from the territory of the whole country have been included in the education programme. The efficiency evaluation has been carried out in a sample of n = 1506 pupils/students in the interventional group and n = 1589 in the control group. Education has been addressed to the entire school environment, pupils, students, parents, teachers, headmasters, and the local community. The survey methodology, body weight and height measurements, the BMI index, and EUROFIT physical fitness tests have been used to assess the effects of the education programme in the scope of knowledge and nutritional behaviour regarding physical activity. There were assumed outcome indicators. The certification of schools/kindergartens with “The Certificate of a School/Kindergarten Friendly to Nutrition and Physical Activity” has been used to evaluate the activation of school environments. Results. There was an improvement achieved over the assumed target points in the level of knowledge of pupils/students in the scope of nutrition and the role of physical activity, in the changes of nutritional habits, and in the results of physical fitness tests. There were achieved 20% increase in knowledge in the scope of nutrition and 5% increase in physical activity. There have been changes in the frequency in the consumption of the first breakfast before going to school (by 25% among the younger ones and by 17% among the older ones), an increase in the consumption of bottled water by 49% and reduction of sweet drinks by 19%. The percentage of the pupils/students consuming the recommended 5 meals increased by 33%. Physical fitness indicators were achieved over assumed 5% increase in the individual exercise tests. The Certificate was obtained after meeting the criteria and documenting the durability of the changes by 65% of 1600 educational units included in the Programme. A decrease in the frequency of overweight and obesity occurrence in the whole intervention sample by 1% was obtained; it was greater (but statistically insignificant) among younger students by 3.3% in comparison to the older ones where there was an increase of 1%. Conclusions. Summing up all achieved results the educational programme “Keep Balance” implemented on the population level aimed at children and adolescents has turned out to be effective and deserves to be continued after minor adjustments. Many positive changes have been identified as well as those that ought to be improved. Comprehensively included education and sometimes small changes in much of nutritional and physical behaviour have influenced the reduction of the percentage of pupils/students with excessive body weight, despite the fact that the average BMI has basically remained on the same level.
    Źródło:
    Roczniki Państwowego Zakładu Higieny; 2020, 71, 4; 383-391
    0035-7715
    Pojawia się w:
    Roczniki Państwowego Zakładu Higieny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of obesity on the bone morphometry and histomorphometry in male and female Wistar rats
    Autorzy:
    Wolski, D.
    Wawrzyniak, A.
    Bieńko, M.
    Michalik, J.
    Radzki, R.P.
    Arciszewski, M.B.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087700.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    bone tissue
    histomorphometry
    humerus
    obesity
    osteocytes
    adipocytes
    rats
    Źródło:
    Polish Journal of Veterinary Sciences; 2018, 21, 3; 599-608
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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