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Wyświetlanie 1-15 z 17
Tytuł:
Effects of Physical and Personal Risk Factors on Sick Leave Due to Musculoskeletal Disorders
Autorzy:
Motamedzade, M.
Faghih, M. A.
Golmohammadi, R.
Faradmal, J.
Mohammadi, H.
Powiązania:
https://bibliotekanauki.pl/articles/90566.pdf
Data publikacji:
2013
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
sick leave
physical risk factors
musculoskeletal disorders
assembly workers
car manufacturing
czynniki ryzyka
zwolnienie lekarskie
zaburzenia układu mięśniowo-szkieletowego
Opis:
The purpose of this study was to investigate the effects of physical and personal risk factors on sick leave due to musculoskeletal disorders in an Iranian car company. In this cross-sectional study, 234 workers participated and all of them had sick leave due to musculoskeletal disorders in the past year. A physical risk factor checklist and personal information questionnaire were used as data-gathering tools. There was no significant relationship between physical risk factors and sick leave (p > .05). Cigarette smoking (p = .045), body mass index >30 (p = .046) and age (p = .044) showed a significant relationship with sick leave. Workers with lumbar deviation of 20°–60° (OR 1.10) and >60° (OR 1.11) were at greater risk. The ratios for workers with repetitive work (OR 1.30) and workers with force exertion (OR 1.36) were greater than for other workers. Taking preventive actions to improve the ergonomic working conditions of assembly workers and their lifestyle seems crucial.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2013, 19, 4; 513-521
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Manual Material Handling Assessment Among Workers of Iranian Casting Workshops
Autorzy:
Mohammadi, H.
Motamedzade, M.
Faghih, M. A.
Bayat, H.
Mohraz, M. H.
Musavi, S.
Powiązania:
https://bibliotekanauki.pl/articles/89709.pdf
Data publikacji:
2013
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
musculoskeletal disorders
manual material handling
casting workers
Snook tables
warsztaty odlewnicze
zaburzenia układu mięśniowo-szkieletowego
magazynowanie
pracownicy odlewni
Opis:
Manual material handling (MMH) tasks can be found in most workplaces and they may constitute a risk factor for work-related musculoskeletal disorders (WMSDs). This study was conducted to determine the prevalence of WMSDs and to compare MMH loads with the acceptable weight and force limits among Iranian casting workers. Data were collected from 50 workers of casting workshops who performed MMH tasks. The Nordic musculoskeletal disorders questionnaire and the Snook tables were used as tools for data collection. Hand/wrist symptoms were the most prevalent problems among the workers (84%). The results of the Snook tables showed that the loads in lifting (84%), lowering (86%), carrying (66%), pushing with initial (43%) and sustained force (59%), and pulling tasks with initial (48%) and sustained force (93%) exceeded recommended limits. WMSDs occurred in high rates among the workers and, thus, ergonomics interventions should focus on decreasing WMSDs and redesigning MMH tasks.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2013, 19, 4; 675-681
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of Fecal Egg Counts and ELISA for the diagnosis of Dicrocoelium Dendriticum infection
Autorzy:
Naeemipour1, M.
Hashemitabar, Ch.R.
Dastjerdi, K.
Jamshidian Mojaver, M.
Mohammadi, H.R.
Powiązania:
https://bibliotekanauki.pl/articles/32321.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
From economical point of view, Dicrocoelium Dendriticum (D. dendriticum) causes a lot of damages to the livestock industry annually. So, the rapid diagnosis of infection is very important. The diagnosis is based on egg per count of feces (EPG) test because detection according to clinical symptoms is difficult. Since EPG is not accurate and sensitive, the serological methods become important for the diagnosis of this parasite as they are more accurate in comparison to EPG test and they are able to diagnose infection in a short time. In this study, somatic and Excretory-secretory antigens (EsAg) were isolated. The ELISA test was set up according to positive and negative sera and the results which were obtained compared to those obtained by the EPG test. The prevalence of infection in 550 samples by ELISA and EPG methods were 56% and 7% respectively, which shows the significant difference between these methods in examining the rate of infection. Based on the results, the specificity and sensitivity in ELISA test were 95% and 94%, respectively. The results showed that the ELISA is a more reliable test in comparison to EPG test for the rapid diagnosis of D. dendriticum infection.
Źródło:
Polish Journal of Veterinary Sciences; 2016, 19, 3
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some physiological responses of wheat and bean to soil salinity at low matric suctions
Autorzy:
Khatar, M.
Mohammadi, M.H.
Shekari, F.
Powiązania:
https://bibliotekanauki.pl/articles/24475.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Opis:
The effect of soil matric suction (2-33 kPa) and salinity (soil solution electrical conductivity 0.7-8 dS m-1 for bean and 2-20 dS m-1 for wheat) on some physiological characteristics of bean and wheat in a clay loam soil under greenhouse condition was investigated. The results showed that the leaf chlorophyll content index and potassium concentration decrease under salinity stress and increase with matric suction from 2 to 33 kPa suction for both plants. The wheat chlorophyll content index declines during the stress spell but bean chlorophyll content index remains nearly constant. The lowest values of the content of soluble sugars and the highest values of leaf proline content are observed at 2 kPa matric suction (highest aeration stress) for bean and wheat. As matric suction increases from 2 to 6 kPa, the soluble sugars increases and proline content decreases significantly and then soluble sugars decreases and proline content increases until 10 kPa suction, and the soluble sugars remains nearly constant at the higher matric suctions for both plants. While the electrical conductivity effect on the soluble sugars is not significant, the values of proline content for both crop increase significantly with electrical conductivity. It was shown that the aeration stress can result in more considerable and rapid physiological responses, in comparison with salinity stress. There is a strong correlation between wheat and bean chlorophyll content index and potassium concentration under salinity and aeration stresses.
Źródło:
International Agrophysics; 2017, 31, 1
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of canola chlorophyll index and leaf nitrogen under wide range of soil moisture
Autorzy:
Meskini-Vishkaee, F.
Mohammadi, M.H.
Neyshabouri, M.R.
Shekari, F.
Powiązania:
https://bibliotekanauki.pl/articles/25557.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
canola
chlorophyll level
leaf
nitrogen
soil moisture
plant stress
environmental stress
Opis:
The paper presents a study on the effect of soil matric suction on the variation of leaf chlorophyll index and nitrogen concentration of canola. Results showed that chlorophyll index increases exponentially with soil matric suction, especially at the late season of canola growing time. At moderate matric suction (200 and 300 kPa soil suction heads), chlorophyll index remains nearly constant, but in drier soil (matric suction >300 kPa),chlorophyll index increases gradually with time. Despite the va-riation of the total leaf nitrogen with the soil matric suction, it is similar to the variation of the chlorophyll index, but the results showed that the chlorophyll index – nitrogen concentration curve has a de-marcated bi-modal shape. We suggest that 2.7% of nitrogen and 69.8 of the chlorophyll index value represent the upper limit of the chlorophyll meter reliability for estimation of canola nitrogen under a wide range of soil moisture levels. These results confirm that the chlorophyll meter can be used as an effective tool for rapid and non-destructive estimation of the relative chlorophyll and nitrogen content in canola leaves at a wide range of soil moisture content, except for nearly wilting coefficient or extremely high drought stress.
Źródło:
International Agrophysics; 2015, 29, 1
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biocontrol potential of Trichoderma harzianum in controlling wilt disease of pistachio caused by Verticillium dahliae
Autorzy:
Fotoohiyan, Z.
Rezaee, S.
Bonjar, G.H.S.
Mohammadi, A.H.
Moradi, M.
Powiązania:
https://bibliotekanauki.pl/articles/65568.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
biological control
Trichoderma harzianum
controlling
wilt disease
antagonism
pistachio
orchard
Verticillium dahliae
Iran
Opis:
Verticillium wilt caused by Verticillium dahliae, is one of the most devastating diseases in pistachio orchards in the world including Iran. In search for an eff ective non-chemical strategy for the management of this disease, we evaluated the biocontrol potential of Trichoderma harzianum isolates obtained from the rhizosphere of healthy pistachio trees in diff erent locations of the Kerman province of Iran against V. dahliae under laboratory and greenhouse conditions. Dual culture tests in the laboratory were conducted in a completely randomized design using 72 T. harzianum isolates. Twenty isolates showed the highest in vitro antagonistic activity. Th e results indicated that all 20 isolates were capable of inhibiting the mycelial growth of V. dahliae signifi cantly. Among them, isolates Tr8 and Tr19 were the most eff ective by 88.89% and 85.12% inhibition, respectively. Extracted cell free metabolites of all eff ective isolates also inhibited the growth of V. dahliae in the culture medium signifi cantly. According to the results, isolates Tr4 and Tr6 inhibited fungal pathogen growth by 94.94% and 88.15% respectively, through production of non-volatile metabolites. In the evaluation of volatile metabolites, isolates Tr5 and Tr4 were the most eff ective by 26.27% and 24.49% growth inhibition, respectively. Based on the results of the in vitro experiments, the fi ve most eff ective isolates were selected for evaluation under greenhouse conditions for their biocontrol potential in controlling Verticillium wilt of pistachio. Results of the greenhouse, (in vivo) experiments were positive and indicated that the occurrence of wilt disease in plants treated with the antagonists alone or in combination with pathogenic fungus was lower than in plants inoculated with pathogen alone. Th e overall results of this study suggest that Trichoderma fungal antagonist may be an eff ective biocontrol agent for the control of Verticillium wilt of pistachio.
Źródło:
Journal of Plant Protection Research; 2017, 57, 2
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on Bacillus isolated from intestine of Persian sturgeon (Acipenser persicus) comparing with commercial probiotics
Autorzy:
Tabari, M.
Tabari, K.
Karimzadegan, H.
Mohammadi, M.
Powiązania:
https://bibliotekanauki.pl/articles/11072.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Źródło:
International Letters of Natural Sciences; 2016, 60
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Epitope prediction, modeling, and docking studies for H3L protein as an agent of smallpox
Autorzy:
Mohammadi, E.
Dashty, S.
Powiązania:
https://bibliotekanauki.pl/articles/80380.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
H3L protein
smallpox
epitope
prediction
modelling
bioinformatics
major histocompatibility complex
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2019, 100, 1
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Parametric estimation of water retention using mGMDH method and principal component analysis
Autorzy:
Neyshaburi, M.R.
Bayat, H.
Rastgou, M.
Mohammadi, K.
Gregory, A.S.
Nariman-Zadeh, N.
Powiązania:
https://bibliotekanauki.pl/articles/905465.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Opis:
Performing a primary analysis, such as principal component analysis (PCA) may increase accuracy and reliability of developed pedotransfer functions (PTFs). This study focuses on the usefulness of the soil penetration resistance (PR) and principal components (PCs) as new inputs along with the others to develop the PTFs for estimating the soil water retention curve (SWRC) using a multi-objective group method of data handling (mGMDH). The Brooks and Corey (1964) SWRC model was used to give a description of the water retention curves and its parameters were determined from experimental SWRC data. To select eight PCs, PCA was applied to all measured or calculated variables. Penetration resistance, organic matter (OM), aggregates mean weight diameter (MWD), saturated hydraulic conductivity (Ks), macro porosity (Mp), micro porosity (Mip) and eight selected PCs were used as predictors to estimate the Brooks and Corey model parameters by mGMDH. Using PR or OM, Ks and MWD, improved the estimation of SWRC in some cases. Using the predicted PR can be useful in the estimation of SWRC. Using either the MP and Mip or the eight PCs significantly improved the PTFs accuracy and reliability. It would be very useful to apply PCA on the original variables as a primary analysis to develop parametric PTFs.
Źródło:
Polish Journal of Soil Science; 2016, 49, 1
0079-2985
Pojawia się w:
Polish Journal of Soil Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of plant growth adjuvants on direct regeneration of Mohammadi flower (Rosa damascena Mill.) using thin cell layering technique
Autorzy:
Mirshahi, H.
Mahdinezhad, N.
Soloki, M.
Samiei, L.
Powiązania:
https://bibliotekanauki.pl/articles/12715591.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Opis:
Regeneration is one of the most important methods in the massive proliferation of ornamental plants through micropropagation and genetic modification. Thin cell layering (TCL) technique, is a new introduction of micropropagation efficiency in producing optimized mass scale of crops. The horizontally placed TCL explants (tTCLs) was examined in Van der Salm (VS) basal medium in combination with different plant adjuvants (proline, glutamic acid, casein hydrolysate) to investigate their effect on callus induction and shoot regeneration of the explants. In order to produce healthy propagules of Rosa damascena Mill. on a large scale, a new cost-effective method of tissue culture has been established. The results indicated the positive effect of proline (0.5 gr/l) and glutamic acid (300 mg/l) in both callus induction and regeneration stage. Also, in rooting phase, different concentrations of IBA and NAA (0, 0.3, 0.6, 0.9 mg/l) in basal ½ Van der Salm (VS) medium were tested. It was observed that the best results were related to 0.3 mg/l IBA + 0.3 mg/l NAA in ½ Van der Salm (VS) medium.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2020, 19, 3; 167-177
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Two torymid species (Hymenoptera: Chalcidoidea, Torymidae) developing on Artemisia gall midges (Diptera: Cecidomyiidae)
Autorzy:
Lotfalizadeh, H.
Mohammadi-Khoramabadi, A.
Powiązania:
https://bibliotekanauki.pl/articles/65617.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Torymidae
parasitoid
Hymenoptera
Chalcidoidea
Artemisia
gall midge
Diptera
Cecidomyiidae
distribution
new record
Opis:
Two parasitoid wasps, Torymus artemisiae Mayr and Torymoides violaceus (Nikol’skaya), were reared on Artemisia herba-alba (Asteraceae) galles, in central Iran. Torymus artemisiae and T. violaceus were developed from the gall midges: Rhopalomyia navasi Tavares and R. hispanica Tavares, respectively. The occurrence of these two parasitic wasps in Iran, and their associations with R. navasi and R. hispanica, are new. Data on the wasps’ biological associations and geographical distribution are provided. The parasitoid compositions of the genus Rhopalomyia (Diptera: Cecidomyiidae) were also discussed.
Źródło:
Journal of Plant Protection Research; 2015, 55, 4
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of inoculation with Piriformospora indica and Sebacina vermifera on growth of selected Brassicaceae plants under greenhouse conditions
Autorzy:
Kari Dolatabadi, H.
Mohammadi Goltapeh, E.
Powiązania:
https://bibliotekanauki.pl/articles/2159.pdf
Data publikacji:
2013
Wydawca:
Instytut Ogrodnictwa
Tematy:
Brassicaceae
Piriformospora indica
Sebacina vermifera
inoculation
plant height
dry weight
greenhouse condition
Źródło:
Journal of Horticultural Research; 2013, 21, 2
2300-5009
Pojawia się w:
Journal of Horticultural Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High Temperature Corrosion Performance of Carbon Steel Coated with Iron Aluminide in Mixture of O2 and SO2 Atmosphere
Autorzy:
Omranian-Mohammadi, P.
Raiszadeh, R.
Shahverdi, H. R.
Powiązania:
https://bibliotekanauki.pl/articles/352419.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
iron aluminide
high temperature corrosion
plain carbon steel
Opis:
In this investigation the surface of an aluminized sample of plain carbon steel was melted and alloyed using a tingsten inert gas (TIG) welding process to produce iron-aluminide intermetallic phases on the surface. The produced coating was then characterized by SEM and EDS and its high-temperature properties in O2 + 1%SO2 gas were examined. The results showed that the Fe3 Al coating produced could protect the substrate as it was subjected to the corroding gases at 700°C due to the formation of an alumina layer between the substrate and an outer layer of Fe2 O3 . At 900°C, the coating could only protect the substrate for 64 h. The lack of further protection at this temperature is attributed to the decrease in the protective properties of alumina with an increase in its temperature and the lack of presence of enough Al atoms in the coating for the repair of the defects formed in the alumina layer.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 2; 529-538
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Designing a simple radiometric system to predict void fraction percentage independent of flow pattern using radial basis function
Autorzy:
Roshani, G. H.
Nazemi, E.
Shama, F.
Imani, M. A.
Mohammadi, S.
Powiązania:
https://bibliotekanauki.pl/articles/221419.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
two-phase flow
gamma-ray attenuation
scintillation detector
void fraction
artificial neural network
Opis:
The void fraction is one of the most important parameters characterizing a multiphase flow. The prediction of the performance of any system operating with more than single phase relies on our knowledge and ability to measure the void fraction. In this work, a validated simulation study was performed in order to predict the void fraction independent of the flow pattern in gas-liquid two-phase flows using a gamma ray 60Co source and just one scintillation detector with the help of an artificial neural network (ANN) model of radial basis function (RBF). Three used inputs of ANN include a registered count under Compton continuum and counts under full energy peaks of 1173 and 1333 keV. The output is a void fraction percentage. Applying this methodology, the percentage of void fraction independent of the flow pattern of a gas-liquid two-phase flow was estimated with a mean relative error less than 1.17%. Although the error obtained in this study is almost close to those obtained in other similar works, only one detector was used, while in the previous studies at least two detectors were employed. Advantages of using fewer detectors are: cost reduction and system simplification.
Źródło:
Metrology and Measurement Systems; 2018, 25, 2; 347-358
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fault Current Limiter optimal sizing considering different Microgrid operational modes using Bat and Cuckoo Search Algorithm
Autorzy:
Arani, A. A. K.
Bayati, N.
Mohammadi, R.
Gharehpetian, G. B.
Sadeghi, S. H.
Powiązania:
https://bibliotekanauki.pl/articles/140644.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fault current limiter (FCL)
Bat Algorithm (BA)
Cuckoo Search Algorithm (CSA)
microgrid (MG)
Opis:
Nowadays, the development of smart grids has been the focus of attention due to its advantages for power systems. One of the aspects of smart grids defined by using distributed generation (DG) in a low voltage network is a microgrid (MG). Based on its operational states, MG can operate in different configurations such as grid-connected mode or off-grid mode. The switching between these states is one of the challenging issues in this technical area. The fault currents in different buses have higher value compared to islanded mode of MG when the MG is connected to the main grid, which influences the protection equipment. In this situation, some electrical devices may be damaged due to the fault currents. Application of a fault current limiter (FCL) is considered as an effective way to overcome this challenge. The optimal size of these FCLs can optimize the performance of an MG. In this paper, an index for FCL size optimization has been used. In addition, two optimization algorithms (Bat Algorithm and Cuckoo Search Algorithm) have been applied to the problem. The application of an FCL has been studied in grid-connected and islanded-mode. In addition, the application of the capacitor bank in both modes has been investigated. The results of simulations carried out by MATLAB have been presented and compared.
Źródło:
Archives of Electrical Engineering; 2018, 67, 2; 321--332
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 17

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