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Tytuł:
Comparative Study on NH3-SCR of High Entropy Mineral Catalytic Materials for Different Ratios of Rare Earth Concentrate/Rare Earth Tailing
Autorzy:
Meng, Zhaolei
Zhu, Chao
Wang, Jian
Wu, Wenfei
Powiązania:
https://bibliotekanauki.pl/articles/778344.pdf
Data publikacji:
2020
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
rare earth concentrate
rare earth tailings
catalytic denitrification
modification
mineral catalysis
Opis:
A series of high-entropy mineral catalytic materials were obtained by mixing rare earth tailings containing Fe oxide and rare earth concentrate rich in Ce in Baiyun Obo in different proportions, and by acid-base leaching and microwave roasting. The effects of different proportions of mixed rare earth minerals on the denitrification activity of the samples were analyzed by various techniques, including XRD, EDS and SEM. The mineral phase structure and surface morphology of the catalysts were analyzed. The surface properties of the samples were tested by TPD and XPS methods. The denitrification activity of the sample was simultaneously evaluated and compared in the microreactor. The results show that the denitration efficiency of the active powder is the best when the mixing ratio of rare earth tailings/rare earth concentrate is 1:1, the denitration rate can reach 82%. In summary, different proportions of optimization are extremely effective methods to improve catalyst performance.
Źródło:
Polish Journal of Chemical Technology; 2020, 22, 3; 70-78
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Incidence and prevalence of Systemic Sclerosis (SSc) in Poland - differences between rural and urban regions
Autorzy:
Kanecki, Krzysztof
Goryński, Paweł
Tarka, Patryk
Wierzba, Waldemar
Tyszko, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/986639.pdf
Data publikacji:
2017
Wydawca:
Instytut Medycyny Wsi
Tematy:
epidemiology
rare diseases
hospitalization
Opis:
Introduction. Systemic sclerosis (SSc) is a rare and potentially severe connective tissue disease, characterized by skin fibrosis and involvement of internal organs. Because of its rarity and heterogeneous clinical presentation, reliable epidemiological studies on SSc have been particularly difficult to carry out. Objectives. The purpose of this study was to present SSc epidemiology among hospitalized patients in Poland. Materials and method. The analysis was based on population-based administrative data, taken from a Polish hospital morbidity study carried out by the National Institute of Public Health between January 2008 – December 2012. Results. Analyzed data covered 9,049 hospitalization records. The final sample comprised 3,653 patients with first-time hospitalizations for SSc. The average age of the sample was 53 years (SD 16.2; range 0–91 years); 84% of patients were female and 16% male. Based on hospitalization registers, the average SSc incidence was estimated to be 1.9/100,000 per year and peak age of incidence was 55 years. The point prevalence was estimated to be 9.4/100,000 at the end of 2012. SSc was more common in females, with F:M ratio ranging from 6.2:1–4.6:1 depending on the year. Analysis of hospitalization trends revealed that overall numbers of SSc hospitalizations increased, while first-time hospitalizations decreased between 2008–2012. Clusters of higher incidence were observed in more rural regions vs. urban regions. Conclusion. Estimated incidence of SSc in Poland was comparable to reported incidence in other European countries. Analysis of demographic factors and reports of clusters of higher incidence may suggest the existence of environmental risk factors for the development of SSc. These observations may require further research.
Źródło:
Annals of Agricultural and Environmental Medicine; 2017, 24, 2
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dziecko z niepełnosprawnością rzadką. Kilka refleksji pedagoga specjalnego
Autorzy:
Kamyk-Wawryszuk, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/2121917.pdf
Data publikacji:
2022-01-31
Wydawca:
Uniwersytet Gdański. Instytut Pedagogiki
Tematy:
niepełnosprawność rzadka
niepełnosprawność sprzężona
choroba rzadka
rare disability
multiple disability
rare disease
Opis:
Choroba rzadka (RD) może mieć przebieg gwałtowny, postępujący lub etapowy. Jej konsekwencje dla rozwoju danej osoby mogą przyczynić się do ograniczenia możliwości samodzielnego życia lub nieznacznie zmieniać jego jakość. W grupie pacjentów z RD są także dzieci z orzeczoną niepełnosprawnością sprzężoną. W ich przypadku można dostrzec, że trudności, jakie doświadczają, oraz zróżnicowany profil rozwoju, który jest charakterystyczny dla choroby rzadkiej, mogą nie mieścić się w zakresie pojęcia niepełnosprawności sprzężonej. Determinuje to wprowadzenie terminu niepełnosprawność rzadka. Celem artykuły jest opisanie pojęcia niepełnosprawności sprzężonej i rzadkiej oraz ukazanie ich charakterystycznych cech, jak i przeciwieństw w aspekcie choroby rzadkiej. Na podstawie analizy literatury można wskazać, że termin niepełnosprawność rzadka uwzględnia niejednorodny przebieg RD, zmienność jakości życia zarówno dzieci, jak i dorosłych na poszczególnych jej etapach leczenia eksperymentalnego lub zachowawczego oraz podczas niezbędnych, często długotrwałych hospitalizacji.
Rare disease (RD) can procced rapidly, progressively or stepwisely. Its consequences for the person’s development may contribute to limiting the possibility of independent life or may only slightly affect it. The group of patients with RD also includes children with multiple disability. In their case, it can be seen that the difficulties they experience, and varied development profile characteristic for a rare disease may not fall within the scope of the definition of the multiple disability. This determines to implement the definition of rare disability. The goal of this paper is to describe the definition of multiple and rare disability and to show their characteristic features as well as opposites in the aspect of rare disease. Basing on the literature analysis might be indicated that the term ‘rare disability’ includes heterogenous course of RD, the variability of the quality of life both children and adults at different stages of experimental or conservative treatment and during necessary, often long-term hospitalisations.
Źródło:
Niepełnosprawność; 2021, 43; 131-148
2080-9476
2544-0519
Pojawia się w:
Niepełnosprawność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adsorption of lanthanum(III) and yttrium(III) on kaolinite: kinetics and adsorption isotherms
Autorzy:
Zhou, Fang
Feng, Jian
Xie, Xiong
Wu, Baihong
Liu, Qi
Wu, Xiaoyan
Chi, Ruan
Powiązania:
https://bibliotekanauki.pl/articles/109951.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
adsorption
kaolinite
rare earth
kinetics
Opis:
Experimental investigations were carried out using kaolinite to adsorb two rare earth ions, lanthanum ion (La3+) and yttrium ion (Y3+), which will provide some useful information and new insights on the mineralization process and fractionation phenomenon of weathered crust elution-deposited rare earth ores. The results showed that the equilibrium adsorption capacity of Y3+ is greater than La3+ under the same experimental conditions. The adsorption of rare earth ions presents strongly temperature dependent indicating an endothermic adsorption process. The pseudo-first-order kinetic model and the pseudo-second-order kinetic model were applied to discuss the adsorption kinetics. It was found that the adsorption rate of rare earth follows the pseudo-second-order kinetic model among the adsorption temperature range. Furthermore, the adsorption process of rare earth ions on kaolinite followed the Langmuir isotherm model confirmed by the correlation of experimental equilibrium data to standard isotherm model, Langmuir and Freundlich isotherms. The activation energies for the adsorption of La3+ and Y3+ on kaolinite are 28.1903 kJ/mol and 25.4190 kJ/mol, respectively. All kaolinite before and after adsorption were characterized by XRD and SEM-EDX to understand the adsorption mechanism. The obtained results suggested that the adsorption of La3+ and Y3+ on kaolinite is an endothermic and chemisorption process.
Źródło:
Physicochemical Problems of Mineral Processing; 2019, 55, 4; 928-939
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adults with cystic fibrosis – medical challenges and a psychosocial adaptation in the context of risk of a premature death
Autorzy:
Renata, Zubrzycka,
Powiązania:
https://bibliotekanauki.pl/articles/889121.pdf
Data publikacji:
2020-06-02
Wydawca:
Akademia Pedagogiki Specjalnej im. Marii Grzegorzewskiej. Wydawnictwo APS
Tematy:
rare disease
cystic fibrosis
adults
Opis:
Cystic Fibrosis (CF) is the most common life-limiting genetic disorder of Caucasians. It impairs the functions of many organs with its greatest effects on the lungs and digestion. Treatment of the disease involves a multi- component regimen, including airway clearance techniques, nebulized medications, antibiotics, pancreatic enzymes and increased caloric intake. Cystic fibrosis is a burden for patients and their families in the context of their daily life tasks. The article presents generic medical, psychosocial problems of adult patients with CF, which are still little known in Poland. The detailed issues are: medical characteristics of cystic fibrosis as a rare disease, organizational conditions of rehabilitation, specific psychosocial problems including: a depression, an anxiety and a reproductive health in cystic fibrosis in the context of a premature death.
Źródło:
Człowiek - Niepełnosprawność - Społeczeństwo; 2020, 48(2); 83-96
1734-5537
Pojawia się w:
Człowiek - Niepełnosprawność - Społeczeństwo
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of chromatographic plate theory on the weathered crust elution-deposited rare earth ore with carboxylate
Autorzy:
Zhang, Zhenyue
Wang, Guangshuai
Li, Chunhua
Chi, Ruan
Long, Fei
Chen, Zhuo
Chi, Xiao Wang
Liu, Defeng
Powiązania:
https://bibliotekanauki.pl/articles/1446022.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
weathered crust elution-deposited rare earth ore
carboxylate ammonium
mass transfer
theory plate
rare earth
Opis:
To improve the leaching process of rare earth and reduce the impurities in the leachate, the carboxylate ammonium, such as ammonium acetate, ammonium citrate and ammonium tartrate, were selected as lixiviant to compare the effects of concentration, flow rate, pH and temperature on leaching mass process of rare earth and aluminum. Meanwhile, the leaching behaviors of rare earth and aluminum leached by three kinds of carboxylate ammonium were analyzed by chromatographic plate theory. The relationship between the flow rate and height equivalent (HETP) could fit well with the Van Deemter equation and there was an optimal flow rate (uopt) for the leaching of the rare earth and aluminum. Besides, the conditions of carboxylate ammonium lixiviant were optimized. The optimum concentrations of ammonium acetate, ammonium tartrate and ammonium citrate were 15 g/L, 25 g/L and 5 g/L respectively, the leaching flow rate was 0.50 mL/min, the pH value was approximatively 7.00 and the leaching temperature was 293 K to 303 K. At these conditions, the mass transfer efficiencies of three ammonium carboxylates for rare earth and aluminum was in the order of ammonium acetate > ammonium tartrate > ammonium citrate. Moreover, the ammonium acetate could commendably inhibit aluminum ions entering the lixivium.
Źródło:
Physicochemical Problems of Mineral Processing; 2021, 57, 4; 48-62
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bridging East with West of Europe – a comparison of orphan drugs policies in Poland, Russia and the Netherlands
Autorzy:
Baran, Aleksandra
Czech, Marcin
Kooiker, Coen
Hołownia, Malwina
Sykut- Cegielska, Jolanta
Powiązania:
https://bibliotekanauki.pl/articles/895663.pdf
Data publikacji:
2018-12-31
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
reimbursement
rare diseases
orphan drugs
disease registries
national plan for rare diseases
new born screening
Opis:
The goal of this article is to provide an in-depth review of rare disease policies and the reimbursement of ODs in 3 European countries, two EU members (Poland, the Netherlands) and a non-EU one (Russia). A review of publicly available information on rare disorder policies and HTA processes was performed. Experts were consulted for unclear or scarce information. Russia has a five times higher frequency threshold for its rare disease definition than Poland and the Netherlands (both using the EU definition). The Netherlands has vastly increased its disease registries by instituting 300 expert centres via its National Plan, in Poland there are only 6 registries while in Russia one central registry exists. All 3 countries have an HTA process in place, however, the Russian one is relatively undeveloped. The access to ODs in the Netherlands is the broadest with 80 out of 83 EMA approved ODs reimbursed in 2015; Poland reimbursed 49, whereas Russia reimbursed 4 on the federal level and 43 in Moscow region. In all countries new rare disease policies are under development. The availability of healthcare systems solutions and the reimbursement of ODs differs greatly in all 3 countries, mainly in Russia. Even though both states are EU member with common regulations and access to EMA approved drugs, marked differences between Poland and the Netherlands in the range of policies, access to treatments and screening programs exist.
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2018, 75, 6; 1409-1422
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dziecko z mukopolisacharydozą w przedszkolu – perspektywa terapeutów
Child with MPS in Kindergartens – the Therapists’ Perspective
Autorzy:
Kamyk-Wawryszuk, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/15838253.pdf
Data publikacji:
2018-09-15
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
Mucopolysaccharidosis (MPS)
rare diseas
therapy
kindergarten
Opis:
Mucopolysaccharidosis (MPS) is a rare and progressive disorder. It gradually causes the disappearance of the child’s learned skills. There are few scientificpapers concerning the rules of conduct with a child of preschool age with MPS, and therefore therapists’ work often comes down to searching for adequate methods of therapy in order to preserve the skills acquired by the pre-schooler as long as possible. The main research question was: “How does the treatment of a child with mucopolysaccharidosis at an Inclusive Preschool look like from the perspective of therapists?” Four therapists working with two boys suffering from MPS were surveyed in the study.
Źródło:
Studia Edukacyjne; 2018, 49; 299-314
1233-6688
Pojawia się w:
Studia Edukacyjne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Germanate glasses co-doped with Ce3+/Ln3+ (Ln = Pr, Tb, Dy) for white light emitting diodes
Autorzy:
Górny, Agata
Sołtys, Marta
Pisarska, Joanna
Pisarski, Wojciech A.
Powiązania:
https://bibliotekanauki.pl/articles/173993.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
glasses
rare earth ions
white luminescence
Opis:
Glasses doped with lanthanides ions may be good white light emitters due to their interesting physical and spectroscopic properties. In this paper, the optical spectroscopy of rare earths doped glasses with a special emphasis on application as white LED were presented. The luminescent glass materials containing Ln3+ (Ln = Pr, Tb, Dy) and Ce3+ ions were obtained. The glasses samples were prepared by a traditional melt-quenching technique. The optical properties of glasses containing various concentrations of rare earth ions were analyzed. It was observed that luminescence bands corresponding to characteristic transitions of Ln3+ and cerium ions are present on spectra measured under direct excitation of Ce3+. Therefore, it indicates that the energy transfer process between Ce3+ /Pr3+, Ce3+ /Tb3+, Ce3+ / Dy3+ ions in glasses occurs. Some parameters such as correlated color temperature (CCT) and chromaticity coordinates (CIE) that characterize white LEDs were analyzed and discussed in detail.
Źródło:
Optica Applicata; 2019, 49, 3; 383-391
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Possibilities of recovery and separation of rare earth elements
Autorzy:
Fila, Dominika
Powiązania:
https://bibliotekanauki.pl/articles/2079965.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
rare earth elements
resources
recovery
separation
Opis:
Rare earth metals are a group of elements widely used in high technology products. They are included in the group of critical mineral resources for the EU economy. Rare earth elements are found in computers and mobile phones, as well as in low-emission energy technologies. They are also applied in chemical processes as catalysts in the oil refining. Some of them occur even in considerable quantities in the earth's crust but not very often in the concentrations justifying the profitability of their extraction. Additionally, the constantly growing demand and the current market situation cause that alternative resources of rare earth elements recovery are sought after. Therefore, the recovery and separation methods as well as recovery from the secondary sources are becoming more and more important. The following paper presents the possibilities of recovery and separation of rare earth elements from primary and secondary sources.
Źródło:
Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia; 2018, 73, 1; 99-110
2083-358X
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Early support and early intervention as a support for the child and their family based on the biographies of parents of children with rare genetic diseases
Wczesna interwencja i wczesne wspomaganie jako wsparcie dla dziecka i jego rodziny w biografiach rodziców dzieci z rzadkimi chorobami genetycznymi
Autorzy:
Klajmon-Lech, Urszula
Powiązania:
https://bibliotekanauki.pl/articles/941212.pdf
Data publikacji:
2016
Wydawca:
Medical Communications
Tematy:
early intervention
family
rare genetic disease
Opis:
Receiving information on child’s disease or disability is a very difficult and often traumatic experience for the parents. Researchers investigating this issue indicate an array of negative parental emotional reactions such as: a sense of loss, loneliness, shock, mutual blaming, uncertainty, anxiety. Early intervention, understood as interdisciplinary services provided by physiotherapists, doctors, pedagogues, psychologists, and other specialists in the first years of child’s life, is equally needed by both children themselves and their parents, who, owing to the provided education and support, mature to the role of a parent-caretaker-therapist. The paper will address the results of a research conducted among parents of children with rare genetic diseases. The respondents shared their experiences associated with early intervention, assessed the quality of the received support as well as its effects on the child and the family. The study was conducted based on qualitative research methodology. I conducted narrative interviews with the mothers and fathers of children affected by rare chromosomal disorders. The analysis of narration focused on the experiences associated with implemented or non-implemented early intervention. Some of the parents of children with rare chromosomal syndromes had no opportunity to participate in early intervention; respondents in this group complained about specialists ignoring the reported problems and described disease symptoms as well as being involved in a “therapeutic pursuit” for a long time. The other group included parents participating in early intervention programmes. The experience of a rare disease increased their need to expand their knowledge on the disease and treatment options, which certainly presented a significant challenge for specialists. However, even in such a difficult situation it is possible to implement a model early intervention programme, as reported by one of respondents.
Otrzymanie informacji o chorobie lub niepełnosprawności dziecka jest dla jego rodziców doświadczeniem bardzo trudnym, często traumatycznym. Badacze problemu wskazują na szereg negatywnych reakcji emocjonalnych występujących u rodziców: poczucie straty, osamotnienie, szok, wzajemne obwinianie się, niepewność, lęk. Wczesna interwencja, rozumiana jako interdyscyplinarne świadczenia rehabilitantów, lekarzy, pedagogów, psychologów i innych specjalistów w pierwszych latach życia dziecka, potrzebna jest w równym stopniu samemu pacjentowi, jak i jego rodzicom, którzy dzięki wsparciu i pedagogizacji dojrzewają do nowej roli rodzica – opiekuna – terapeuty. W artykule powołam się na wyniki badań przeprowadzonych wśród rodziców dzieci z rzadkimi chorobami genetycznymi. Respondenci dzielili się ze mną swoimi doświadczeniami związanymi z wczesną interwencją, oceniali jakość otrzymanej pomocy oraz jej efekty dotyczące dziecka i rodziny. Badania były prowadzone zgodnie z metodyką badań jakościowych. Przeprowadziłam wywiady narracyjne z matkami i ojcami dzieci z rzadkimi zespołami chromosomowymi. Analiza narracji odnosiła się do doświadczeń związanych z korzystaniem lub niekorzystaniem z wczesnej interwencji. Część rodziców dzieci z rzadkimi zespołami chromosomowymi nie miała możliwości korzystania z usług wczesnej interwencji – badani z tej grupy skarżyli się na lekceważenie przez specjalistów zgłaszanych problemów i opisywanych symptomów choroby, przez dłuższy okres doświadczali także „gonitwy terapeutycznej”. Do drugiej grupy należeli rodzice korzystający z wczesnej interwencji. Doświadczenie rzadkiej choroby zwiększyło ich potrzebę pogłębienia wiedzy o chorobie i sposobach leczenia, co z pewnością było dużym wyzwaniem dla specjalistów, jednak również w tak trudnym przypadku możliwe jest wzorcowe działanie wczesnej interwencji, o którym opowiada jedna z respondentek.
Źródło:
Psychiatria i Psychologia Kliniczna; 2016, 16, 4; 229-236
1644-6313
2451-0645
Pojawia się w:
Psychiatria i Psychologia Kliniczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
COGNITIVE FUNCTIONING AND AUTONOMY OF PATIENTS WITH DUCHENNE MUSCULAR DYSTROPHY
Autorzy:
Anikiej, Paulina
Mański, Arkadiusz
Bidzan, Mariola
Powiązania:
https://bibliotekanauki.pl/articles/2137737.pdf
Data publikacji:
2018-05-08
Wydawca:
Fundacja Edukacji Medycznej, Promocji Zdrowia, Sztuki i Kultury Ars Medica
Tematy:
rare disease
attention
memory
executive functions
Opis:
Cognitive problems and a deepening dependence on one’s immediate environment inherently accompany Duchenne Muscular Dystrophy (DMD). The disease is progressive, and the size of the dystrophin gene determines the extraordinary complexity of the causes of this disease at the genetic and molecular level. The aim of the study was to characterize the cognitive problems and the extent of independence of patients with genetically confirmed DMD. An attempt was also made to reconstruct the patient's life history in three periods: before the appearance of the first symptoms, during the search for a diagnosis and after confirming the diagnosis of DMD. The study group consisted of male patients between 10 and 13 years of age (N = 14). The Diagnosis of Cognitive Functions Battery - PU1 and an experimental tool for studying autonomy were used. Information on the condition of the attention, memory and executive functions of patients was obtained. The study of autonomy measurably supplemented knowledge in terms of the degree of the patients’ dependence on the environment with regard to everyday functioning. The best functioning component of attention in the examined patients is orientation (o) (13 patients achieved average results in this aspect). Selectivity (s) turned out to be the weakest component, as only five patients obtained average results (the others obtained low results) in this aspect. Autonomy results (AU) indicate group diversity and inter-subject variability in the disease progression (subjects scored from 6 to 47 points). The clinical picture of the disease is not homogeneous. Patients, despite their similar age, differ in the progression of the disease and the resulting effects. This induces the need for an individual approach to each patient and the preparation of a unique set of therapeutic interactions for each of them.
Źródło:
Acta Neuropsychologica; 2018, 16(2); 157-166
1730-7503
2084-4298
Pojawia się w:
Acta Neuropsychologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetic and hyperfine interaction in YbFe4Al8 compound
Autorzy:
Gaczyński, P.
Drulis, H.
Powiązania:
https://bibliotekanauki.pl/articles/147203.pdf
Data publikacji:
2004
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
Mössbauer effect
rare earth
iron compounds
Opis:
57Fe Mössbauer spectra of YbFe4Al8 of the tetragonal ThMn12 structure have been investigated. Mössbauer measurements at the lowest temperatures yield information on the iron population in three crystallographic sites 8f, 8j and 8i available for Fe atoms. The obtained results indicate on the coexistence of magnetically ordered and paramagnetic-like Fe moments within antiferromagnetic phase of YbFe4Al8. The MS measurements show that the onset of short range antiferromagnetic interaction in the Fe sublattice takes place at 220 K.
Źródło:
Nukleonika; 2004, 49,suppl.3; 33-36
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Plant growth regulators and sucrose requirements for in vitro induction of shoots from different explants of Atalantia monophylla (L.) Corr. Serr.
Autorzy:
Manokari, M.
Shekhawat, Mahipal S.
Powiązania:
https://bibliotekanauki.pl/articles/1182944.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
atalantia monophylla
in vitro
rare
explants
pgrs
Opis:
An efficient in vitro regeneration and conservation system depend on the healthy culture induction from the suitable explants. Culture induction is a significant stage when very small plant material exists from the rare species. It is necessary to develop culture induction protocol from various explants to conserve the valuable plant species. Atalantia monophylla is a rare species with life giving properties. Shoots were induced from the shoot tip, node and internode explants. Among these the nodal shoot segments were reported most appropriate explant for the induction of shoots from the nodal meristems. MS medium (Murashige and Skoog) proved better than the Woody Plants (WP) medium in bud breaking. Sucrose at 3% level was optimum concentration for the establishment of cultures than the other concentrations evaluated. Shoot tips responded on MS medium supplemented with 0.5 mg L-1 each of BAP and Kin, nodal shoot segments responded better on MS medium augmented with 1.0 mg L-1 BAP . Half strength MS medium supplemented with 2,4-D (1.0 mg L-1) induced maximum responsive callus (87%) from the internode explants.
Źródło:
World Scientific News; 2016, 49, 2; 283-294
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of active admixtures onto tellurite glass refractive index
Autorzy:
Reben, M.
Wasylak, J.
Jaglarz, J.
Powiązania:
https://bibliotekanauki.pl/articles/200746.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
tellurite glass
rare earth ions
refractive index
Opis:
The goal of this work was to investigate the influence of rare earth ions such as Tm3+, Yb3+ on physico-chemical properies of tellurite glass from the TeO2-WO3-PbO-PbF2-Na2O system. The thermal characteristic of tellurite glass Tm3+, Yb3+ doped have been presented. The effect of the glass crystallization on thermal stability of the glass and crystallizing phases formed upon heat treatment were investigated by DTA/DSC/, XRD methods. The spectral dependence of ellipsometric angles of the tellurite glass samples, have been studied. The influence of ions of rare earth elements, i.e. Tm 3+ and Yb3+, onto changes of refractive index of glass P1 (without RE admixture) were examined. The optical measurements were conducted on Woollam M2000 spectroscopic ellipsometer, in spectral range of 190–1700 nm.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2010, 58, 4; 519-522
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 338

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