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Wyszukujesz frazę "burn" wg kryterium: Temat


Tytuł:
Epidemiology of burns in hospitalized children from the Western Pomerania region in Poland in 1985-2010
Autorzy:
Brodzińska, B.
Czaja-Bulsa, G.
Marasz, A.
Musiał, B.
Powiązania:
https://bibliotekanauki.pl/articles/1918407.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
Burn
children
Polska
Opis:
Introduction: Burns in children are a serious public health issue all over the world. This paper aims at comparing the frequency and causes of burns in children. Material and methods: A retrospective analysis of medical records of 1230 children treated at Szczecin's burns centre in 1980s and presently was carried out. Results: We have noted that at present hospitalization frequency of burned children has declined 1.7 times. Children who undergo hospital treatment are mostly aged 1-2 (ns) and boys prevail 1.7 times. Infants constitute a high percentage of burn patients (15% and 17%). A proportion of countryside children has decreased (38% vs 28%; p<0.001) while a proportion of town children has increased. Skin burns most frequently resulted from contact with hot liquid (89% vs 83%; p=0.043). The other causes have been noted far less frequently: flame (7% vs 8%; ns), electric current (1% vs 2%; ns), chemicals (0,7% vs 1%; ns) and a few other factors such as: dry heat, sunrays and solarium (2% vs 5%; p=0.002). Conclusions: 1. Over the course of the past 25 years, Western Pomerania has seen a twofold decrease in the frequency of hospitalization of burned children, while the ages and causes of burns have remained the same. 2. Those most often treated are children aged 1-2, mainly boys; there is a high percentage of infants among them. 3. Hot liquid has remained the chief cause of burns in younger children; in the case of older ones, so is flame.
Źródło:
Progress in Health Sciences; 2017, 7(1); 99-106
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Change of Traditional Method of Treatment of Partial Thickness Burn with Hydrofibre Dressings
Autorzy:
Mitura, Kryspin
Osłowska, Jolanta
Mitura, Alicja
Powiązania:
https://bibliotekanauki.pl/articles/1395548.pdf
Data publikacji:
2015-02-01
Wydawca:
Index Copernicus International
Tematy:
skin burn wound
partial thickness burn
hydrofiber dressing
silver ions
Opis:
Nearly 1% of population is affected with burn trauma annually. Among patients seeking advanced medical care almost 8% require hospital stay. Most burns are superficial and do not cause full thickness damage to the skin. Standard topical treatment of burn wounds with creams and ointments requires frequent dressings’ changes. The healing process is long and expensive. The technological revolution, as occurred in the last decade in the field of dressing care allows us to introduce the use of advanced material solutions. Modern materials allow to shorten the treatment time, reduce the expenses and diminish the patient discomfort leading to good outcome. The study presented a case of four patients treated due to the partial thickness burn wound. Hydrofiber dressing with silver ions were introduced in the treatment. We observed good short and long term results
Źródło:
Polish Journal of Surgery; 2015, 87, 2; 91-96
0032-373X
2299-2847
Pojawia się w:
Polish Journal of Surgery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of Risk of Burn Out at Workers in the Field of Social Services and Health Care
Autorzy:
Budayová, Zuzana
Ludvigh Cintulová, Lucia
Mrosková, Lenka
Powiązania:
https://bibliotekanauki.pl/articles/18668779.pdf
Data publikacji:
2023-06-20
Wydawca:
Fundacja Pro Scientia Publica
Tematy:
Burn out
signs of burn out
Social work
health care
Opis:
Aim. The aim of the research was to analyse the burnout rate of these social workers and nurses, as well as to determine the relationship between burnout syndrome and other important factors, including lifestyle, stress, resistance to stress and other selected demographic indicators. Methods. The Maslach Burnout Inventory was used to collect burnout data in 2021 during the second wave of the Covid-19 pandemic. The research sample consisted of 623 women aged 35-55 who work in social services facilities for the elderly and nurses working in the geriatrics department at a hospital in the western part of Slovakia. Results. Research has shown that lifestyle has a significant impact on the development of burnout syndrome in connection with the quality of work and personal relationships, which can help eliminate feelings of frustration, exhaustion and personal failure in the workplace. Burnout affects social workers regardless of age and education, but with older age and length of practice in the same facility, the risk of manifestations of burnout increases. Significant differences in burnout rates between social workers and nurses in the individual dimensions of exhaustion, depersonalisation and professional attitudes were confirmed. High levels of exhaustion have even shown an increased risk of alcohol consumption among these workers. Conclusion. The development of chronic stress in health care workers can put them at risk of burnout, which is characterized by emotional exhaustion (EE), depersonalization (DP) in interactions with patients and social clients, and low levels of personal accomplishment (PA) in social work and health care.
Źródło:
Journal of Education Culture and Society; 2023, 14, 1; 365-380
2081-1640
Pojawia się w:
Journal of Education Culture and Society
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Burn-in procedures in accelerated environment and system maintenance policies
Autorzy:
Cha, J. H.
Powiązania:
https://bibliotekanauki.pl/articles/2069586.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
accelerated burn-in
bathtub-shaped failure rate function
optimal burn-in
replacement policy
Opis:
Burn-in is a widely used engineering method which is adopted to eliminate defective items before they are shipped to customers or put into field operation. In order to shorten the burn-in process, burn-in is most often accomplished in an accelerated environment. However, there have been few probabilistic or stochastic models for the burn-in procedures in accelerated environment. In this paper, under a new stochastic model for accelerated burn-in procedure, the problems of determining both optimal accelerated burn-in time and optimal replacement policy are considered. Components are burned-in under an accelerated environment, then those surviving the burn-in procedure are put into field operation and they are maintained under a replacement policy. The properties of the optimal accelerated burn-in time and optimal replacement policy are obtained and a numerical example which illustrates the usage of obtained results will be presented.
Źródło:
Journal of Polish Safety and Reliability Association; 2008, 1; 101--107
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Scots pine Pinus sylvestris mortality after surface fire in oligotrophic pine forest Peucedano-Pinetum in Kampinos National Park
Autorzy:
Tyburski, Łukasz
Zaniewski, Piotr T.
Bolibok, Leszek
Piątkowski, Mateusz
Szczepkowski, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/2044173.pdf
Data publikacji:
2019
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
burn
Kampinos National Park
Scots pine
survival
Opis:
Pines are generally fire-resistant trees. There is a shortage of research on the behaviour of Scots pine after surface fire in older stands. The aim of the work was to describe the effect of the surface fire intensity on the mortality of pines of various diameter at breast height (DBH), including older trees. The research was conducted in Peucedano-Pinetum oligotrophic Scots-pine forest in Kampinos National Park (KPN, central Poland) on the area of two adjacent surface fire sites originated in spring 2015 in 60- to 200-year-old stands (site area: 10,92 ha). There were 45 (28 burned and 17 control) permanent plots established after the fire. The share of not burned, superficially burned and completely burnout organic horizon of the soil was determined within all of them. DBH and location of pine trees were measured within all of the plots on the area of 200 m2. For all of the trees for which full information about soil organic horizon damage was mapped, the prevailing type of disturbance in their close neighbourhoods with radii of 1 and 2 m was assessed. The mortality of trees was assessed after each vegetation period up to 2017, basing on the presence of green needles on the trees. The influence of fire intensity on the survival of trees was examined on whole permanent plot level as well as on individual tree level. Strong linear correlation was observed between Scots pine mortality and the share of plots area with damaged organic layer, especially at the end of the third vegetation period after fire. Logistic regression models constructed for individual trees suggest that bigger tree diameter (hence, thicker bark) diminished the odds of mortality only after two vegetation periods from the fire. After the third vegetation period, only the intensity of surface fire in the close neighbourhood of trees influenced (negatively) the chance on survival. The size of trees did no matter in this case. Nearly all of the trees that were located within burnout organic matter areas died. The results did not support the commonly known mechanism of enhancement of bigger Scots pine tree survival after surface fire because of thicker bark responsible for heat protection. Probably, the main cause of observed mortality was not overheating of cambium but it was rather connected to massive fine root loses. Scots pines growing on oligotrophic arid sites modify their root system to explore topsoil layers with higher proportion of shallow roots, growing even in organic litter layer. This corresponds with massive (regardless of size) pine mortality within sites characterised by complete burnout of organic matter layer and very high survival in those ones with only surfacely burned litter layer. The results can improve the assessment of surface fires consequences in managed Scots pine stands growing in oligotrophic conditions.
Źródło:
Folia Forestalia Polonica. Series A . Forestry; 2019, 61, 1; 51-57
0071-6677
Pojawia się w:
Folia Forestalia Polonica. Series A . Forestry
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Impact of the Types of Microorganisms Isolated from Blood and Wounds on the Results of Treatment in Burn Patients with Sepsis
Autorzy:
Glik, Justyna
Kawecki, Marek
Gaździk, Tadeusz
Nowak, Mariusz
Powiązania:
https://bibliotekanauki.pl/articles/1396591.pdf
Data publikacji:
2012-01-01
Wydawca:
Index Copernicus International
Tematy:
burns
sepsis
burn wound infections
blood infection
Opis:
Despite development of combustiology, infections continue to be the most important cause of death among patients with burns. Sepsis is the most severe clinical presentation of infection in patients after thermal injuries who require immediate treatment. Early diagnosis and proper treatment of sepsis are important in the clinical management that is often hampered for multiple reasons, e.g. impaired patient immunity, problems with microorganisms with multi-antibacterial drug resistance.The aim of the study was to assess effect of type of a microorganism isolated from blood and wound on results of treatment of sepsis in patients with burns.Material and methods. Effect of type of microorganisms isolated from blood and wound on the result of treatment of sepsis was studied in 338 patients hospitalized immediately after an injury in Centre for Burn Treatment in Siemianowice Śląskie in years 2003 - 2004 (at the age of 18 - 96 years, 66 women and 272 men). Clinical symptoms of generalized infection were found in all study subjects. The study group was divided into two subgroups: cured patients and patients who died of sepsis. The following parameters were assessed in both subgroups: type of microorganism isolated from blood, type of microorganism isolated from wound as well as occurrence of the same and different infections of blood and burn wound.Results. positive blood cultures were found in 165 patients (48.8%), 106 (64.2%) were cured, 59 (35.8%) died. The most commonly isolated microorganisms in cured patients were Gram(+) Staphylococcus epidermidis MRSE (19.81%) and Staphylococcus aureus MRSA (18.87%). Gram(-) intestinal rods were least commonly isolated from this group. The most commonly isolated microorganisms from blood of patients who were to die, included non-fermenting Gram(-) rods Acinetobacter baumannii (35.59%) and Pseudomonas aeruginosa (22.03%). Mixed bacterial flora was found in the blood of 22.03% patients. Among patients who were to die, the same microorganisms were found in the blood and in the wound in 32.2% of patients, while this rate was 17.92 in cured patients. The most commonly found bacteria in the blood and burn wound in the cured patients included Staphylococcus aureus MRSA (31.58%) and Staphylococcus aureus (21.05%). In the group of patients who were to die, the most common bacteria isolated simultaneously from the blood and burn wound included Acinetobacter baumannii (47.37%) and Pseudomonas aeruginosa (36.84%).Conclusions. 1. The patients with thermal injuries are at higher risk of death in the event of sepsis caused by Gram(-) bacteria versus Gram(+) bacteria. 2. Infection of blood and burn wound caused by the same bacteria Pseudomonas aeruginosa and Acinetobacter baumanni increases the risk of death due to sepsis in patients with burns following thermal injuries.
Źródło:
Polish Journal of Surgery; 2012, 84, 1; 6-16
0032-373X
2299-2847
Pojawia się w:
Polish Journal of Surgery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Clinical arterial infusion of calcium gluconate: The preferred method for treating hydrofluoric acid burns of distal human limbs
Autorzy:
Zhang, Yuanhai
Ni, Liangfang
Wang, Xingang
Jiang, Ruiming
Liu, Liping
Ye, Chunjiang
Xia, Wenhao
Han, Chunmao
Powiązania:
https://bibliotekanauki.pl/articles/2178799.pdf
Data publikacji:
2014-01-01
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
Hydrofluoric Acid
burn
calcium gluconate
arterial infusion
Opis:
Objective: This study was designed to evaluate the efficiency and safety of arterial infusions of calcium gluconate to treat hydrofluoric (HF) acid burns of the distal human limbs. Materials and Methods: Eligible patients with HF burn limbs, collected from January 2008 to October 2011, were given the arterial infusion of calcium gluconate into the injured limbs. The measures of pain were conducted before the infusion, immediately after the infusion, 4 h after the infusion, and 2 days after the infusion by the visual analogy score (VAS). If the VAS score was higher than 4.0 at the time point 4 h after the first infusion, the infusion was repeated. The time of wound healing, and the number and ratio of the cases receiving the surgical operation were also evaluated. Results: A total of 118 patients, male (107 cases) and female (11 cases), were collected, including 64 cases of outpatients and 54 cases of inpatients. The age of the subjects ranged from 16 to 60 years, with the mean age of 37.6. The burn sites were located in the lateral limbs (28 cases) and in the unilateral limbs (90 cases). For 107 cases, the pain scores decreased quickly after the first infusion. The other 11 cases, with the VAS score higher than 4.0 at the time point 4 h after the first infusion, received the second infusion. The average time of wound healing and the ratio of the cases receiving the surgical operation were closely related to the interval from the injury to the reception of infusion. Conclusions: Arterial infusion of calcium gluconate, effectively relieving the pain, blocking wound progressive deepening, and causing no adverse effects, could be the preferential method to treat hydrofluoric acid burns of the distal human limbs.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2014, 27, 1; 104-113
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Burn disease - the possibility of limiting its effects in the prehospital phase
Choroba oparzeniowa - możliwości ograniczenia jej skutków w fazie przedszpitalnej
Autorzy:
Zdanowski, Rafał
Radziszewski, Jakub
Gorgone, Chiara
Powiązania:
https://bibliotekanauki.pl/articles/1033102.pdf
Data publikacji:
2019
Wydawca:
Towarzystwo Pomocy Doraźnej
Tematy:
burn disease
burns
first aid.
injuries
medical emergency
Opis:
Burns represent a significant percentage of injuries amongst trauma patients. The risks from a burn wound depends on the causative factor, time and place of exposure, extent and severity of the burn. Classification according to the American Burn Association indicates that severe burns should be diagnosed from as low as 10% of Third-degree total body surface burn. The burn disease develops progressively through shock, catabolic and anabolic phases until the development of Multiple Organ Dysfunction Syndrome (MODS). Actions performed in the pre-hospital phase are crucial for the effectiveness of the therapeutic process. Wrongful first aid performed by a witnesses of the event may worsen the patient's condition and lead to secondary infection. Studies available in the literature indicate the use of egg whites, yoghurts and ice as means of first aid. Educational projects to promote good practice, using products such as hydrogel dressings, seem therefore necessary. Medical personnel should quickly assess the extent and severity of burns. Furthermore, one ought to implement volume-calculated fluid therapy, protect the respiratory tract and strive to ensure thermal comfort. It seems mandatory to assess the extent of pain and administer appropriate pharmacological measures to perform analgosedation. Due to the limited number of specialist burn treatment centres, paramedics should consider indications for hospitalization and the use of Medical Air Rescue (MAR) enabling rapid patient allocation.
Oparzenia stanowią znaczny odsetek wśród pacjentów urazowych. Zagrożenia wynikające z powstania rany oparzeniowej zależą od czynnika powodującego, czasu i miejsca ekspozycji, rozległości oraz stopnia oparzenia. Klasyfikacja według American Burn Association wskazuje, że oparzenia ciężkie należy rozpoznać już od 10% powierzchni ciała oparzonej w stopniu III. Choroba oparzeniowa rozwija się stopniowo przechodząc przez fazę wstrząsową, kataboliczną, anaboliczną, aż do rozwinięcia się pełnoobjawowego zespołu niewydolności wielonarządowej (MODS – Multiple Organ Dysfunction Syndrome). Dla skuteczności procesu terapeutycznego kluczowe są działania wykonane w fazie przedszpitalnej. Błędnie udzielona pierwsza pomoc przez świadków zdarzenia może pogorszyć stan pacjenta i prowadzić do wtórnego zakażenia. Badania dostępne w literaturze wskazują na wykorzystywanie w ramach pierwszej pomocy białek jaj kurzych, jogurtów i lodu. Dlatego konieczne wydają się projekty edukacyjne promujące prawidłowe zasady postępowania, z wykorzystaniem takich produktów jak opatrunki hydrożelowe. Personel medyczny powinien dokonać szybkiej oceny rozległości i stopnia oparzeń. Należy wdrożyć odpowiednio wyliczoną objętościowo płynoterapię, zabezpieczyć drogi oddechowe i dążyć do zachowania komfortu termicznego. Obowiązkowa wydaje się ocena skali bólu oraz podanie właściwych środków farmakologicznych w celu wykonania analgosedacji. Z uwagi na ograniczoną liczbę specjalistycznych ośrodków leczenia oparzeń ratownicy medyczni powinni rozważyć wskazania do hospitalizacji, a także wykorzystanie Medical Air Rescue (MAR) umożliwiającego szybką alokację pacjenta.
Źródło:
Critical Care Innovations; 2019, 2, 4; 25-35
2545-2533
Pojawia się w:
Critical Care Innovations
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reconsideration of thermonuclear possibilities of Z-pinches
Autorzy:
Vikhrev, V. V.
Powiązania:
https://bibliotekanauki.pl/articles/147474.pdf
Data publikacji:
2001
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
fusion burn wave
neutrons
plasma focus
Z-pinch
Opis:
The paper considers the Z-pinch as the basis for future thermonuclear fusion reactors. Experiments on Z-pinches always concern small and high temperature and a high density plasma regions that arise spontaneously in the Z-pinch neck. A burn wave might be initiated in the Z-pinch column if in this small plasma region a Lawson-like condition is fulfilled.
Źródło:
Nukleonika; 2001, 46, suppl. 1; 9-12
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Advantages and Shortcomings of Using Nano-sized Energetic Materials
Autorzy:
Zohari, N.
Keshavarz, M. H.
Seyedsadjadi, S. A.
Powiązania:
https://bibliotekanauki.pl/articles/358244.pdf
Data publikacji:
2013
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
energetic compounds
nanosized particles
sensitivity
burn
rate
thermal stability
Opis:
Energetic materials are substances that can store chemical energy in their chemical bonds. An ideal energetic material is a substance with high performance, safety and shelf life. Many recent researches have concentrated on the synthesis or the development of new energetic materials with optimized properties, such as thermal stability, sensitivity and burn rate. The reduction of the particle size of energetic materials from micron to nano-sized is one of the suitable approaches for obtaining desirable properties. Recent progress on the reduction of the particle size of energetic materials is reviewed in this work. The effects of nano-sized particles on the performance of energetic compounds are also investigated.
Źródło:
Central European Journal of Energetic Materials; 2013, 10, 1; 135-147
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Own experience from the use of a substitute of an allogeneic acellular dermal matrix revitalized with in vitro cultured skin cells in clinical practice
Autorzy:
Łabuś, Wojciech
Kawecki, Marek
Glik, Justyna
Maj, Mariusz
Kitala, Diana
Misiuga, Marcelina
Klama-Baryła, Agnieszka
Kraut, Małgorzata
Nowak, Mariusz
Powiązania:
https://bibliotekanauki.pl/articles/1394264.pdf
Data publikacji:
2015
Wydawca:
Index Copernicus International
Tematy:
acellular dermal matrix ADM
burn
fibroblasts
keratinocytes
tissue engineering
Opis:
As a result of the removal of cells from human allogeneic dermis, a collagen scaffold is obtained, which can be populated de novo with autologous/allogeneic skin cells and transplanted onto the area of skin loss. The optimal method for production of acellular dermal matrices (ADM) has been selected. Three female patients (a mean age of 54 years) were subjected to the transplantation of either autologous or allogeneic keratinocytes and fibroblasts into the holes of acellular dermal matrix (ADM) mesh graft. The method for burn wound treatment based on the use of a viable dermal-epidermal skin substitute (based on ADM and in vitro cultured fibroblasts and keratinocytes) may be the optimal method of burn treatment.
Źródło:
Polish Journal of Surgery; 2015, 87, 10; 513-521
0032-373X
2299-2847
Pojawia się w:
Polish Journal of Surgery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wiebe function parameter determination for mass fraction burn calculation in an ETHANOL-GASOLINE fuelled SI engine
Autorzy:
Yeliana, Yeliana
Cooney, C.
Worm, J.
Michalek, D.
Naber, J.
Powiązania:
https://bibliotekanauki.pl/articles/949481.pdf
Data publikacji:
2008
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
ethanol-gasoline blend
mass fraction burn
IC engine
Wiebe function
Opis:
The Mass Fraction Burn (MFB) and Heat Release Rate (HRR) reflect the amount of fuel burned and the rate of burning throughout the combustion process in an internal combustion engine. These parameters play a crucial role in research and development endeavours focused on engine efficiency, emissions, and overall operating performance. Analytically in a Spark-Ignition (SI) engine, these parameters are often modelled with the Wiebe function, a well known mass fraction burn formulation, which is a function of "a" (efficiency parameter), "m" (form factor), crank angle, and the duration of combustion. This function is a simple but powerful correlation model that is well suited for zero and one dimensional engine cycle simulations. In this work, the Wiebe function parameters are determined over a range of fuel compositions and compression ratios by fitting the Wiebe function curve to the experimentally obtained MFB data from a single-zone HRR analysis. The Wiebe function parameters are determined using a curve fitting model by finding the minimum of a scalar function of several variables. This functionality has been built into the single-zone mass fraction burned model. Experiments with five ethanol-gasoline fuel blends: E0 (gasoline), E20, E40, E60, and E84 were conducted on a SI Cooperative Fuels Research (CFR) engine while holding a constant load of 330 kPa Net Indicated Mean Effective Pressure (Net IMEP). There were five methods introduced to fit the Wiebe function parameters, which utilized a combination of least square method and direct algebraic solution. This paper details the process used to determine the Wiebe function parameters, and compare the results obtained using these methods for the ethanol-gasoline mixture concentrations.
Źródło:
Journal of KONES; 2008, 15, 3; 567-574
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antibacterial activity of modified zinc oxide nanoparticles against Pseudomonas aeruginosa isolates of burn infections
Autorzy:
Aysa, Noor Hadi
Salman, Halah Dawood
Powiązania:
https://bibliotekanauki.pl/articles/1191368.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Antimicrobial activity
Pseudomonas aeruginosa
ZnO
burn infection
nanoparticles
surface modification
Opis:
In this research antimicrobial activity of nanoparticles ZnO on perilous bacteria such as Pseudomonas aeruginosa was evaluated. P. aeruginosa is important pathogen that caused burn wound infections as it is multi-drug resistant and has several virulence factors. Fifteen samples of P. aeruginosa were collected from patients who suffering from Burn infections in Al-Hilla teaching hospital burn unit with the age range between (7-80) years old for both genders. After collecting burn samples, the diagnosis and characterization were performed by culturing and biochemical tests. ZnO NPs were synthesized by chemical method, Zinc oxide nanoparticles are well-known to be one of the multifunctional inorganic compounds which are widely used in medical applications. This study aims to prepare ZnO nanoparticles with particle size ranging from 23-29  nm. In the present study, surface modification of ZnO nanoparticles was performed, and influence of modification of the structure and morphological properties was investigated. The resulting nanoparticles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and atomic force (AFM). Zinc oxide nanoparticles with the average diameter of about 29 nm were modified with an oleic acid to exert more compatibility. From the results obtained it is suggested that modified ZnO-nanoparticles could be used effectively in safety environmental and medical applications. Antibacterial activity for nanoparticle ZnO against P. aeruginosa isolates was measured by: Agar Diffusion Technique and Minimum Inhibitory Concentration (MIC)/Minimum bactericidal Concentration (MBC) with microdilution. The best zone of inhibition was (35.5mm) at a concentration of 40 μg/ml of nano-ZnO in one strain of P. aeruginosa while the lowest inhibition zone was (16 mm) at a concentration of 20 μg/ml of nano ZnO in one strain also. In addition, all P. aeruginosa isolates were completely inhibited at the concentration of 3.7 μg/ml of nano-ZnO (MIC) but no significant antibacterial activity was observed at concentrations less than 1.8 μg/ml of nano-ZnO and the (MBC) was same as MIC (3.7 μg/ml) for all P.aeruginosa isolates.
Źródło:
World Scientific News; 2016, 33; 1-14
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computation of concentration changes of heavy metals in the fuel assemblies with 1.6% enrichment by ORIGEN code for VVER-1000
Autorzy:
Rahgoshay, M.
Powiązania:
https://bibliotekanauki.pl/articles/146274.pdf
Data publikacji:
2006
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
ORIGEN code
burn-up
heavy metals
BUSHEHR Nuclear Power Plant
Opis:
ORIGEN code is a widely used computer code for calculating the buildup, decay, and processing of radioactive materials. During the past few years, a sustained effort was undertaken by ORNL to update the original ORIGEN code [4] and its associated data bases. The results of this effort were updated on the reactor model, cross section, fission product yields, decay data, decay photon data and the ORIGEN computer code itself. In this paper we have obtained concentration changes of uranium and plutonium isotopes by ORIGEN code at different burn-up and then the results have been compared with VVER-1000 results in the first fuel cycle for fuel assemblies with 1.6% enrichment in the BUSHEHR Nuclear Power Plant.
Źródło:
Nukleonika; 2006, 51, 3; 161-167
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Towards New Directions in Oxidizers/Energetic Fillers for Composite Propellants: an Overview
Autorzy:
Dey, A.
Sikder, A. K.
Talawar, M. B.
Chottopadhyay, S.
Powiązania:
https://bibliotekanauki.pl/articles/358191.pdf
Data publikacji:
2015
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
binder
oxidizer
composite propellant
burn rate modifier
plasticizer
high energy materials
Opis:
There is continued interest in the development of safe and reliable composite propellant formulations using modern energetic ingredients such as energetic oxidizers/energetic ingredients, energetic binders, and energetic ballistic modifiers. There are continued efforts by energetic materials researchers, scientists, technologists and engineers to design composite propellant formulations with better ballistic properties than conventional formulations. The efforts in many research and development (R & D) laboratories all over the world are aimed at utilizing modern oxidizers/ energetic fillers for the development of composite propellant formulations for both space and defence applications. Composite propellants are considered to be the major source of chemical energy for rockets and missiles. Energetic oxidizers/fillers play vital roles in the preparation or manufacture of composite propellant formulations. Various energetic oxidizers/fillers have been developed during the last five decades to address environmental safety, high energy and processing conditions. In this article, the authors have reviewed the characteristic properties of the energetic oxidizers/fillers used in the preparation of composite propellants. The characteristic properties of the energetic ingredients play an important role in the preparation of composite propellant formulations with the desired mechanical properties. The advantages and disadvantages of various energetic oxidizers/ingredients for specific and potential propellant applications are also highlighted throughout the course of this review article. The future direction in composite propellant formulations calls for the development of green propellant formulations. Efforts will continue to seek alternative and more energetic oxidizers/fillers in comparison to conventional oxidizers. There is an urgent need to replace conventional oxidizers such as ammonium perchlorate with eco-friendly ingredients.
Źródło:
Central European Journal of Energetic Materials; 2015, 12, 2; 377-399
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł

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