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Wyświetlanie 1-7 z 7
Tytuł:
Investigation of HFC-134a decomposition by combustion and its kinetic characteristics in a laboratory scale reactor
Autorzy:
Mi, T.
Han, J.
He, X.
Qin, L.
Powiązania:
https://bibliotekanauki.pl/articles/207909.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
thermal decomposition
hydrochlorofluorocarbons
HFC
combustion
R134a
rozkład termiczny
hydrofluorokarbony
freony
spalanie
Opis:
Thermal decomposition of HFC-134a at 900–1000 K was investigated using a laboratory scale reactor. The experimental results indicate that the lower initial HFC-134a concentration and higher reaction temperature could enhance HFC-134a decomposition efficiency. Based on the results of measurements, it seems that the reaction order is around 1. Its activation energy (Ea) and the frequency factor (A) in the investigated temperature range are 300.5 kJ·mol–1 and 2.96×1014, respectively. The results demonstrate that 99.9% destruction efficiency could be achieved when HFC-134a/LPG is below 0.5 and the excess air ratio – above 0.6.
Źródło:
Environment Protection Engineering; 2015, 41, 4; 143-150
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Эффективность лечения хронического катарального гингивита у больных с гепато-билиарной патологией с использованием гепатопротектора и пребиотика
The effectiveness of the treatment of chronic catarrhal gingivitis with hepatoprotector and prebiotic in patients with hepatobiliary pathology
Autorzy:
Levitsky, A.P.
Skidan, M.I.
Tomilina, T.V.
Powiązania:
https://bibliotekanauki.pl/articles/1032511.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Kazimierza Wielkiego w Bydgoszczy
Tematy:
гингивит
гепато-билиарная патология
гепатопротектор
пребиотик
gingivitis
hepatobiliary pathology
hepatoprotector
prebiotic
Opis:
Состояние печени и желчевыводящих путей существенно влияет на функциональную деятельность многих органов и систем, включая характер течения патологических процессов в полости рта. Нарушения антимикробной функции печени могут вызвать развитие или обострить течение стоматологического заболевания, в патогенезе которого решающую роль играет микробный фактор. Цель исследования – изучение влияния на эффективность лечения больных хроническим катаральным гингивитом, развившемся на фоне гепато-билиарной патологии (ГБП), с применением гепатопротектора кверцетина (биофлавоноид, Р-витаминактивное соединение, обладает сильным антиоксидантным, противовоспалительным, адаптогенным действием) и пребиотика инулина, который, стимулируя рост пробиотической микрофлоры, устраняет явления дисбиоза, как правило, развивающиеся при патологии печени. Под наблюдением находилось 85 больных в возрасте 25-49 лет (диагноз – хронический холецистит или желчекаменная болезнь) и 15 здоровых людей такого же возраста (контрольная группа). Все больные с ГБП получали медикаментозное лечение в соответствии с протоколом лечения. Базовое лечение гингивита осуществляли в соответствии с существующими медицинскими стандартами. В дополнение к базовой схеме лечения гингивита 45 пациентов (основная группа) получали кверцетин (80 мг один раз в день) и препарат инулина из цикория (3 г в день). Препараты принимали перорально за 30 минут до еды в течение 7 дней. Остальные 40 пациентов получали только базовую терапию. У больных с гингивитом в сочетании с ГБП снижается саливация, увеличиваются индексы гигиены и гингивита, растет уровень в слюне биохимических маркеров воспаления (эластаза, МДА), микробной обсемененности (уреаза), снижается активность лизоцима и каталазы, а также антиоксидантно-прооксидантный индекс АПИ. Напротив, ферментативный показатель степени дисбиоза увеличивается почти в 12 раз. Назначение в дополнение к базовому лечению пребиотика инулина и гепатопротектора кверцетина существенно улучшает состояние пародонта пациентов и биохимические показатели слюны.
The state of liver and bile passages influences essentially on the functional activity of most organs and systems, including the character of the course of pathologic processes in oral cavity. The disorders in antimicrobic function of liver may cause the development or aggravate the course of the stomatological disease, in the pathogenesis of which the main role is played by microbe factor. The aim of the investigation is to study the influence on the effectiveness of the treatment of patients with chronic catarrhal gingivitis, developed simultaneously to hepatobiliary pathology (HBP), with hepatoprotector quercethin (bioflavonoid, P-vitamin-active compound with strong antioxidant, anti-inflammatory and adaptogenic effect) and prebiotic inulin, which stimulating the growth of prebiotic microflora, removes the phenomena of dysbiosis, that as a rule develop at pathology of liver. 85 patients at the age of 25-49 years old (diagnosis –chronic cholecystitis and cholelithiasis) and 15 healthy people of the same age (the control group) were under observation. All patients with HBP underwent medical treatment according to the treatment protocol. The basic treatment of gingivitis was held in correspondence of the existing medical standards. In addition to the basic scheme of treatment of gingivitis 45 patients (the main group) got quercethin (80 mg once a day) and the preparation of inulin from chicory (3g/day). The preparations were taken per-oral 30 minutes before meal during 7 days. The other 40 patients got only basic therapy. In patients with gingivitis in combination with HBP the salivation decreases, the indices of hygiene and gingivitis increase, the level of biochemical inflammatory markers (elastase, MDA) and microbe insemination (urease) in saliva grows, the activity of lysozyme and catalase as well as antioxidant-prooxidant index API reduces. On the contrary, the enzymatic index of the degree of dysbiosis grows almost by 12 times. The prescription of prebiotic inulin and hepatoprotector quercethin in addition to the basic treatment improves considerably the state of periodontium of the patients and biochemical indices of saliva.
Źródło:
Journal of Health Sciences; 2014, 4, 1; 51-60
1429-9623
Pojawia się w:
Journal of Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nutrient flux fuels the summer primary productivity in the oligotrophic waters of the Gulf of Aqaba, Red Sea
Autorzy:
Badran, M.I.
Rasheed, M.
Manasrah, R.
Al-Najjar, T.
Powiązania:
https://bibliotekanauki.pl/articles/47744.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
Aqaba Gulf
biological stress
diffusion model
chlorophyll a
oligotrophic water
primary productivity
thermohaline stratification
nutrient flux
Red Sea
Opis:
The thermohaline characteristics of the Gulf of Aqaba, Red Sea, depict a welldefined seasonal pattern of winter mixing from December to April and summer stratification from May to November. This thermohaline structure is a major controlling factor of the nutrient, chlorophyll a and primary productivity seasonal cycles. The nitrate and chlorophyll a concentration records generated down to 200 m at a vertical resolution of 25 m – weekly during 1994, 1995 and every two weeks from April 1997 through to December 2000 – are employed to assess the nitrogen flux across the summer thermocline of the Gulf of Aqaba. The flux calculations are based on a simple diffusion model that incorporates the physical stress eddy diffusivity factor Kz and a biological stress factor k. Both Kz and k are calculated using the Michaelis-Menten equation and the nitrate concentration gradient. The total nitrate flux of the Gulf of Aqaba during the seven summer months (May–November) is estimated at 0.52 moleN m−2. In relation to established primary productivity values (75.5 gC m−2 (May November)−1) and the generated chlorophyll a records, this yields an f fraction of new to total primary production of 0.50. This relatively high f value is discussed with respect to the geophysical characteristics of the Gulf of Aqaba and similar oceanic basins. The remaining 50% is accounted for by cross-sectional flow from the relatively nutrientrich coral reef coastal habitat and rapid recycling, triggered by high irradiance and water temperature.
Źródło:
Oceanologia; 2005, 47, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antioxidant activity, quality parameters and grain characteristics of rice varieties of Afghanistan
Autorzy:
Rayee, R.
Xuan, T.D.
Kakar, K.
Haqani, M.I.
Powiązania:
https://bibliotekanauki.pl/articles/11136.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Źródło:
International Letters of Natural Sciences; 2019, 73
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of the TOF-SIMS and SEM-EDS methods to assess the influence of dusting from a phosphate waste deposal place based on hair analysis
Autorzy:
Szynkowska, M.I.
Leśniewska, E.
Pawlaczyk, A.
Rogowski, J.
Paryjczak, T.
Powiązania:
https://bibliotekanauki.pl/articles/778695.pdf
Data publikacji:
2007
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
fosfogips
analiza powierzchni
włos
SEM-EDS
ToF-SIMS
phosphogypsum
surface analysis
hair
TOF-SIMS
Opis:
In this work, scanning electron microscopy with energy dispersive X-ray spectrometry (SEM-EDS) and the time-of-flight secondary ion mass spectrometry (TOF-SIMS) were used to study the particles present on the hair surface of the inhabitants of Wislinka (people environmentally exposed due to the closeness of a dump) in order to obtain the information about the possible influence of dusting from a phosphate waste deposal place. Additionally, the morphology and the composition of fresh phosphogypsum were analyzed. Waste phosphogypsum is formed in the process of a wet phosphoric acid production and there is still a problem with its storage. A thorough understanding of the composition and chemistry of phosphogypsum seems to be necessary to evaluate its environmental impact comprehensively. The results obtained from these two techniques turned out to be complementary and revealed the information expected.
Źródło:
Polish Journal of Chemical Technology; 2007, 9, 4; 85-90
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The mercury analysis in airborne particles emitted from coal-combustion processes
Autorzy:
Szynkowska, M.I.
Leśniewska, E.
Pawlaczyk, A.
Albińska, J.
Bawolak, K.
Paryjczak, T.
Powiązania:
https://bibliotekanauki.pl/articles/779974.pdf
Data publikacji:
2007
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
rtęć
spalanie węgla
analizator rtęci
pył
mercury
coal combustion
mercury analyzer
ash
Opis:
Determination of trace elements in combusted materials has always been an interesting field of environmental studies. Particulate matter, in particular, is a serious problem which, can lead to air pollution especially by heavy metals emissions in urban and industrial areas. There is a considerable concern about the elevated level of mercury released during combustion and the proportion of anthropogenic mercury in the environment. Nowadays, small-scale installations have been identified as a significant source-pathway for mercury pollution, particularly those that use coal. A total amount of mercury was determined using Mercury Analyzer. The investigated material consists of bottom ash, fly ash, slag, soot or dust. The obtained results varied according to the type of the material and plant. The developed methodology was checked by carrying out the analysis of certificate material of Soil NCS ZC 73001 and the reference material of Soil-7.
Źródło:
Polish Journal of Chemical Technology; 2007, 9, 2; 46-48
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Immunogenicity of recombinant bacterial antigens expressed as fusion proteins in transgenic rice seeds
Autorzy:
Zaman, S.
Islam, S.M.T.
Khan, M.K.
Alam, M.M.
Uddin, M.I.
Baby, N.I.
Islam, S.
Bhuiyan, T.R.
Qadri, F.
Seraj, Z.I.
Powiązania:
https://bibliotekanauki.pl/articles/80383.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
rice seed
transgenic rice plant
gene sequence
fusion protein
tuberculosis
vaccine
oral vaccine
Ag85B antigen
cholera
bacterial antigen
immunogenicity
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2017, 98, 4
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-7 z 7

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