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Tytuł:
Thermal and kinetic analysis of pure and contaminated ionic liquid: 1-butyl-2.3-dimethylimidazolium chloride (BDMIMCl)
Autorzy:
Muhammad, A.
Powiązania:
https://bibliotekanauki.pl/articles/949468.pdf
Data publikacji:
2016
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
ionic liquid
thermal stability
kinetic analysis
activation energy
Opis:
In this research work, thermal decomposition and kinetic analysis of pure and contaminated imidazolium based ionic liquid (IL) has been investigated. As thermal decomposition and kinetics evaluation plays a pivotal role in effective process design. Therefore, thermal stability of pure 1-butyl-2,3-dimethylimidazolium chloride (BDMIMCl) was found to be higher than the sample of IL with the addition of 20% (wt.) NH4Cl as an impurity. The activation energy of thermal degradation of IL and other kinetic parameters were determined using Coats Redfern method. The activation energy for pure IL was reduced in the presence of NH4Cl as contaminant i.e., from 58.7 kJ/mol to 46.4 kJ/mol.
Źródło:
Polish Journal of Chemical Technology; 2016, 18, 2; 122-125
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mediating role of the innovation effectiveness on the relationship between entrepreneurial orientation and the SMEs performance in Algeria
Mediacyjna rola efektywności innowacyjnej pomiędzy orientacją przedsiębiorczą i wydajnością MŚP w Algierii
Autorzy:
Rochdi, D.
Khatijah, O.
Muhammad, A. S. A. H.
Powiązania:
https://bibliotekanauki.pl/articles/405516.pdf
Data publikacji:
2017
Wydawca:
Politechnika Częstochowska
Tematy:
entrepreneurial orientation
firm performance
process innovation effectiveness
SMEs
Algeria
orientacja przedsiębiorcza
wydajność firmy
efektywność innowacji w obrębie procesu
MŚP w Algierii
Algieria
Opis:
Entrepreneurial orientation is a crucial element for a firm’s success. Nonetheless, most of the findings from previous studies provide the results of testing the direct effect of entrepreneurial orientation on firm performance. Various factors have been used to determine the relationship between entrepreneurial orientation and firm performance by past studies. In this study, we contribute to the entrepreneurial orientation and firm performance literature by proposing a wider perspective with intermediate step: type of process innovation effectiveness. A quantitative approach and simple random sampling through self-administered questionnaire was adopted to collect the data from SMEs sector which consist of the SMEs owners, directors, and the general managers in Algeria. There were 291 respondents who participated and 258 respondents were usable for further analysis after the screening process. SPSS - 20 and Smart-PLS 2.0 were utilized to screen and analyze the data. The results of data analysis showed that the entrepreneurial orientation does not have significant direct effect on the firm performance. It means that there is an intervening variable between entrepreneurial orientation and firm performance namely process innovation effectiveness. Further, this study found that the process innovation effectiveness mediates the relationship between entrepreneurial orientation and the firm performance.
Orientacja przedsiębiorcza jest kluczowym elementem sukcesu firmy. Niemniej jednak, większość wniosków z dotychczasowych badań dostarcza wyników dotyczących testowania bezpośredniego wpływu orientacji przedsiębiorczej na wydajność firmy. W badaniach tych w celu określenia zależności między orientacją przedsiębiorczą a wydajnością firmy wykorzystywano różne czynniki. Niniejsze opracowanie stanowi przyczynek do literatury na temat orientacji przedsiębiorczej i wydajności firmy, proponując szerszą perspektywę z etapem pośrednim: rodzajem efektywności innowacji w obrębie procesu. W celu zebrania danych z sektora MŚP, obejmujących właścicieli, dyrektorów i dyrektorów naczelnych MŚP w Algierii, przyjęto podejście ilościowe i proste losowe pobieranie próbek przy wykorzystaniu samodzielnego kwestionariusza. W badaniu wzięło udział 291 respondentów, po przeglądzie, odpowiedzi 258 respondentów nadawały się do dalszej analizy. Do przeszukiwania i analizy danych wykorzystane zostały programy SPSS - 20 i Smart-PLS 2.0. Wyniki analizy danych wykazały, że orientacja przedsiębiorcza nie ma istotnego bezpośredniego wpływu na wydajność przedsiębiorstwa. Oznacza to, że pomiędzy orientacją przedsiębiorczą a wydajnością firmy istnieje interwencyjna zmienna, zwana efektywnością innowacji w obrębie procesu. Ponadto, niniejsze opracowanie wykazało, że efektywność innowacji w obrębie procesu pośredniczy w relacji między orientacją przedsiębiorczą a wydajnością firmy.
Źródło:
Polish Journal of Management Studies; 2017, 15, 1; 185-196
2081-7452
Pojawia się w:
Polish Journal of Management Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mitigating the bending losses of the silica-titania-based rib waveguide structure
Autorzy:
Shahbaz, Muhammad
Kozłowski, Łukasz
Butt, Muhammad A.
Piramidowicz, Ryszard
Powiązania:
https://bibliotekanauki.pl/articles/2204159.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:
photonic integrated chips
waveguides
silica-titania
ridge waveguide
strip waveguide
Opis:
Optical waveguides (WGs) are widely used as interconnects in integrated optical circuits both for telecommunication and sensing applications. There are different kind of optical WG designs that offers different guiding parameters, opening a vast number of possibilities. A silica-titania (SiO₂:TiO₂) rib WG is discussed and examined by a numerical analysis in this article with a great emphasis on the analysis of bending losses and optimization. A modal analysis for different basic parameters of the WG is presented with a detailed wavelengthbased modal analysis. Various potential fabrication methods are discussed, however, a solgel method and dip-coating deposition technique are proposed for the low-cost development of such WGs. Moreover, an approach towards minimizing the bending losses by adding an upper cladding layer on the rib WG is presented and described.
Źródło:
Opto-Electronics Review; 2023, 31, 1; art. no. e145551
1230-3402
Pojawia się w:
Opto-Electronics Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microstructures Analyses of Malay Keris and Its Relation to Mechanical Properties
Autorzy:
Ghazali, M.
Daud, M.
Muhammad, A.
Omar, M.
Azhari, C.
Powiązania:
https://bibliotekanauki.pl/articles/1193946.pdf
Data publikacji:
2015-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.40.-z
Opis:
The traditional steps in the fabrication of Malay Keris blades which are preserved in traditional knowledge are explained in consistency with the modern metallurgical engineering. These are forging, quenching, tempering and etching. The material selection process for specific parts of the blade is discussed and correlated to the particular fabrication method used to produce the final properties, which consist of the ductility, hardness and the watermark pattern on the blade. Morphologies of the microstructure are also in agreement with the observed properties in which the central strip of the blades possesses some ductility to facilitate forging whereas the harder edge area is made of steel with higher carbon content
Źródło:
Acta Physica Polonica A; 2015, 127, 4; 1358-1362
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of the effect of zinc oxide nanoparticles and extract of Acorus calamus applied topically on surgical wounds inflicted on the skin of rabbits
Autorzy:
Abbas, A.
Muhammad, S.A.
Ashar, A.
Mehfooz, S.A.
Rauf, A.
Bakhsh, M.
Nadeem, T.
Fu, H.
Powiązania:
https://bibliotekanauki.pl/articles/16648000.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
antibiotic resistance
nanoparticle
plant extract
wound
Opis:
Antibiotics are used for postsurgical wound healing purposes but unfortunately, resistance against them demands some alternatives for quick recovery. Sepsis of wounds is a challenge for medical as well as veterinary professionals. Nanoparticles have significant advantages in wound treatment and drug resistance reversal. This study was conducted to appreciate emerging alternates of antibiotics like zinc oxide nanoparticles and plant extracts in topical application. Zinc oxide is considered a good wound healer and its nanoparticles are easy to access. So, the efficacies of zinc oxide nanoparticles and sweet flag plant extract ointments were tested to compare modern and traditional therapeutics as sweet flag is considered a pure medicinal plant. Rabbits were selected for this study due to the healing properties of their skin. Wounds were inflicted on the thoracolumbar region and treated for 29 days post-surgically daily with normal saline and the ointment of zinc oxide nanoparticles and sweet flag extract ointment, prepared in a hydrophilic solvent. Wound shrinkage was observed daily and histopathological analysis was made and results were compared. Zinc oxide nanoparticles ointment showed the most satisfactory results for every parameter included in the study. No side effects of its topical application were observed. Healing was normal without any complications. The preparations of zinc oxide nanoparticles may help in the era of antibiotic resistance as topical drugs in the future.
Źródło:
Polish Journal of Veterinary Sciences; 2023, 26, 2; 285-293
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Minimising backbreak at the Dewan Cement limestone quarry using an artificial neural network
Minimalizacja zasięgu kruszenia złoża poza obszarem prac strzałowych w kamieniołomie wydobywającym wapień do produkcji cementu w Dewan, przy wykorzystaniu sztucznych sieci neuronowych
Autorzy:
Muhammad, K.
Shah, A.
Powiązania:
https://bibliotekanauki.pl/articles/219371.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
sieci neuronowe
zasięg kruszenia
analiza wrażliwości
modelowanie
projektowanie robót strzałowych
kamieniołom
neural network
backbreak
sensitivity analysis
modeling
blast design
quarry
Opis:
Backbreak, defined as excessive breakage behind the last row of blastholes in blasting operations at a quarry, causes destabilisation of rock slopes, improper fragmentation, minimises drilling efficiency. In this paper an artificial neural network (ANN) is applied to predict backbreak, using 12 input parameters representing various controllable factors, such as the characteristics of explosives and geometrical blast design, at the Dewan Cement limestone quarry in Hattar, Pakistan. This ANN was trained with several model architectures. The 12-2-1 ANN model was selected as the simplest model yielding the best result, with a reported correlation coefficient of 0.98 and 0.97 in the training and validation phases, respectively. Sensitivity analysis of the model suggested that backbreak can be reduced most effectively by reducing powder factor, blasthole inclination, and burden. Field tests were subsequently carried out in which these sensitive parameters were varied accordingly; as a result, backbreak was controlled and reduced from 8 m to less than a metre. The resulting reduction in powder factor (kg of explosives used per m3 of blasted material) also reduced blasting costs.
Kruszenie części złoża poza obszarem prowadzonych prac strzałowych oznacza nadmierne pękanie skał poza ostatnim rzędem otworów strzałowych w trakcie prac w kamieniołomach i prowadzi do destabilizacji górotworu poprzez zmianę nachylenia warstw skalnych, powoduje niepotrzebną fragmentację skał i obniża efektywność prac wiertniczych. W pracy tej wykorzystano sztuczną sieć neuronową (ANN) do przewidywania zasięgu kruszenia dalszej części złoża przy wykorzystaniu 12 parametrów wejściowych. Parametry te opisują różne zmienne czynniki, np. charakterystyka materiału wybuchowego czy przyjęty plan prac strzałowych w kamieniołomie Deewan w regionie Hattar w Pakistanie. Prowadzono proces uczenia sieci dla różnej architektury modelu, wybrano model 12-2-1 ANN, jako model najprostszy, zapewniający najlepszy wynik a współczynniki korelacji uzyskane dla fazy uczenia i walidacji wyniosły odpowiednio 0.98 i 0.97. Przeprowadzona analiza wrażliwości modelu wykazała że zasięg kruszenia dalszych części złoża obniżyć można poprzez zmianę parametrów ładunku strzelniczego, zmianę nachylenia otworów strzałowych oraz zmianę przybitki. Badania terenowe w czasie których ulegały zmianie wartości wyżej wymienionych wrażliwych parametrów wykazały, że zasięg kruszenia złoża poza obszarem prac strzałowych ograniczono z uprzednich 8 m do wielkości poniżej jednego metra. Obniżenie współczynnika charakteryzującego ładunek (kg zastosowanego materiału wybuchowego przypadający na 1 m3 rozkruszonego materiału skalnego) pozwoliło także na obniżenie kosztów prac strzałowych.
Źródło:
Archives of Mining Sciences; 2017, 62, 4; 795-806
0860-7001
Pojawia się w:
Archives of Mining Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design and optimization of a cross-beam force transducer for a stationary dynamometer for measuring milling cutting force
Autorzy:
Rizal, Muhammad
Ghani, Jaharah A.
Usman, Husni
Dirhamsyah, Muhammad
Mubarak, Amir Zaki
Powiązania:
https://bibliotekanauki.pl/articles/24084662.pdf
Data publikacji:
2023
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
force transducer optimisation
stationary dynamometer
cutting force measurement
Opis:
This paper’s objective is to design and optimize a force transducer to build a stationary dynamometer that can measure three axes of milling cutting force. To reduce interference error and increase sensitivity, the force transducer's Maltese cross-beam design was optimized. The force transducer's performance depends on three design parameters: the cross-rectangular beam's through-hole length and width, the compliant plate thickness, and the strain, stress, and stiffness of force transducer constructions calculated by ANSYS. The response surface method (RSM) estimates a desired second-order polynomial function for three geometric parameters based on sensitivity, interference error, safety factor, and stiffness. A stationary dynamometer prototype was made with four optimized force transducers and several piezoresistive strain sensors. The developed dynamometer has good linearity, repeatability, and hysteresis, as well as high sensitivities and low cross-sensitivity errors. The reference dynamometer's cutting force measurements were very close to those of the designed dynamometer in the validation test.
Źródło:
Journal of Machine Engineering; 2023, 23, 2; 41--65
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heavy Metals in the Water, Sediment, and Fish Harvested from the Krueng Sabee River Aceh Province, Indonesia
Autorzy:
Nasir, Muhammad
Muchlisin, Zainal A.
Saiful, Saiful
Suhendrayatna, Suhendrayatna
Munira, Munira
Iqhrammullah, Muhammad
Powiązania:
https://bibliotekanauki.pl/articles/1955570.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
water quality
sediment
gold mine
fish
heavy metals
Krueng Sabee
Opis:
The pollution of rivers from human activities such as housing, markets, workshops, transportation, land cultivation, and industry has become an issue. The increasing contribution of heavy metals to pollution in rivers has a direct effect on the metal bioaccumulation in fish. Therefore, this study aimed to examine the concentrations of Cd, Cu, and Pb in the waters, sediment, and fish harvested from the Krueng Sabee River, Aceh Province, Indonesia. Furthermore, the water, sediment, and fish samples were collected from six locations representing the upstream and downstream regions of the river. Cd, Cu, and Pb were analyzed using Atomic Absorption Spectrophotometry (AAS). The results showed that Cd, Cu, and Pb were not detected in the water, while the concentration of Cd in the sediments ranges between 0.0544 to 0.2683 mg kg-1, Cu ranges between 4.4149 to 14.8160 mg kg-1, and Pb ranges between 0.9186–15.4954 mg kg-1. Therefore, Cd, Cu, and Pb in the water and sediment were below the quality standard, but these heavy metals in the fish sample met the threshold limit. The highest Cd concentration was reported in Tor soro (5.5591 mg kg-1), and the highest concentration of Cu was reported in Mugil cephalus (6.7021 mg kg-1), while the higher Pb concentration was reported in Cyclocheilichthys Apogon (0.0279 mg kg-1).
Źródło:
Journal of Ecological Engineering; 2021, 22, 9; 224-231
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nuclear model calculation of excitation functions of neutron induced reactions on the structural materials of the miniature neutron source reactor (Nigeria Research Reactor 1)
Autorzy:
Dauda, A.
Jonah, S. A.
Hassan, M.
Muhammad, B. G.
Powiązania:
https://bibliotekanauki.pl/articles/1182744.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
EXFOR
EXIFON
MNSR
NIRR-1
Opis:
Nuclear models calculation of excitation functions was performed using the nuclear theoretical model code EXIFON on the impurity nuclides of the Be-reflector of the MNSR (NIRR-1). Elements with concentration greater than 100 ppm were considered in the energy range of 0-20 MeV. Result of the calculated excitation functions obtained with the code EXIFON were compared with the experimental data retrieved from IAEA-Nuclear Data section EXFOR data library. Some of the results of the calculated excitation functions agree well with the experimental data, while some disagree. The good agreement was obtained for nuclides with magic number of neutrons and protons. Shell structure effects were not taken into consideration during calculation with theoretical model code. This might be the reason for disagreement. It is also noted that most of the data retrieved from EXFOR data library were incomplete, scanty, and are measured around 14 MeV. This exposed the short coming of using measured data for calculation of excitation functions. On the other hand the result of calculated excitation function with the Code EXIFON seems to give good result. Empirical research method was largely used in determining the success of this research.
Źródło:
World Scientific News; 2017, 66; 86-96
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Utilization of Scelocarya birrea kernel meal (SBKM) as protein supplement in the diets of fattening Uda sheep
Autorzy:
Muhammad, N.
Omogbai, I. J.
Maigandi, S. A.
Abubakar, I. A.
Powiązania:
https://bibliotekanauki.pl/articles/1192683.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Scelocarya birrea kernel meal (SBKM)
protein supplement
fattening sheep
Opis:
An experiment was conducted at Usmanu Danfodiyo University Teaching and Research Farm Sokoto, Nigeria to determine the utilization of Scelocarya birrea kernel meal (SBKM) as protein supplement in the diet of Uda sheep. Sixteen intact male animals were used for the experiment. The animals were divided into four (4) treatment groups replicated five times. The animals were fed diets containing 0, 5, 10 and 15% Scelocarya birrea kernel meal (SBKM). Data generated from the study were subjected to analysis of variance (ANOVA). Where significant difference exists, least significant different (LSD) was used to separate the means. Results indicated that total feed intake increased with increased level of SBKM up to 5% inclusion level; thereafter, it declined (P<0.05). Average daily gain (ADG) decreased from 99.90g/day for treatment 2 (5% SBKM) to 59.5g/day for treatment 4 (15% SBKM) (P< 0.05). Digestibility of dry matter (DM), crude protein (CP), crude fibre (CF), Nitrogen free extract (NFE) and ether extract (EE) were higher for treatment 2 (5% SBKM) (P< 0.05). Cost of fed per kg live weight gain (N 553.33/kg was lower (P<0.05) for treatment 2 (5% SBKM) compared to other treatments. It was concluded that inclusion of SBKM in the diet of Uda sheep should not exceed 5%.
Źródło:
World Scientific News; 2016, 46; 52-64
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
FORMULATION AND EVALUATION OF INDOMETHACIN LOADED NANOSPONGES FOR ORAL DELIVERY
Autorzy:
Abbas, Nasir
Sarwar, Komal
Irfan, Muhammad
Hussain, Amjad
Mehmood, Rabia
Arshad, Muhammad S.
Shah, Pervaiz A.
Powiązania:
https://bibliotekanauki.pl/articles/895238.pdf
Data publikacji:
2018-10-31
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
sustained release
indomethacin
Nanosponges
Emulsion solvent diffusion method
Franz diffusion cell
Opis:
Nanosponges (NS) loaded sustained release tablet formulations of a non-steroidal anti-inflammatory drug; Indomethacin were successfully developed and evaluated for their pharmaceutical properties. Twelve nanosponge formulations were fabricated by solvent diffusion method by using different ratios of drug and polymers (ethyl cellulose and polyvinyl alcohol). Particle size of all the formulations was in the nano range of 221 to 625 nm and it was found dependent on the polymer concentration. Drug loading and entrapment efficiency was ranged in 32.2 to 59.4 % and 30.1 to 64.8 %, respectively. Formulations with equal proportion of drug and polymer resulted in higher values of drug loading and entrapment efficiency. Percent yield was also found dependent on the relative drug polymer ratio with highest value of 51 % was achieved for the formulation having same drug to polymer ratio. SEM results confirmed the formation of spherical and porous structures. Structural analysis by Fourier transform infrared spectroscopy (FTIR), powder x-ray diffraction (PXRD) showed the absence of any interaction between drug and polymer. In comparison to pure drug, NS formulations showed a linear intrinsic dissolution rate (IDR) profile depicting a controlled release profile. Diffusion studies of NS formulations performed by Franz diffusion cell and dialysis bag methods showed comparable results in terms of precision and linearity of diffusion profile. Tablets prepared from the drug loaded NS showed acceptable values for hardness, friability and drug content. Release of drug from NS tablets was confirmed as sustained release behaviour.
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2018, 75, 5; 1201-1213
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fate and Management of Pollution of Hexavalent Chromium Cr(VI) and Heavy Metals in the Zarqa River Basin in Jordan
Autorzy:
Shammout, Maisa'a W.
Shatanawi, Muhammad
Awwad, Akl M.
Powiązania:
https://bibliotekanauki.pl/articles/2026728.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
Zarqa River Basin
industrial activity
water pollution
hexavalent chromium
Cr(VI)
heavy metals
decision maker
Opis:
This paper focused on the fate of pollution and management of hexavalent chromium Cr(VI) and heavy metals in the Zarqa River Basin in Jordan. The Zarqa River basin was selected in this research because it contains the majority of Jordanian industries, which are the main source of pollutants including Cr(VI) and heavy metals. This will help in assisting water resource management organizations in decision making when coping with pollution. Industries related to sources and impacts of Cr(VI) and heavy metals were identified, and the administration measures were highlighted according to their role in improving water quality. An analysis of water samples along the Zarqa River was conducted between 2016-2019 to evaluate the heavy metals concentrations and compare the results with the Jordanian standards. Findings showed that Cr(VI) was below the allowable limits (<5 μg/l), and the heavy metals were within the allowed limits set forth in the Jordanian Standard. The ranges of water analysis values (μg/L) were; DO 4640–6480, Fe <40–80, Mn 20–128, Co <20–30, Pb 80–190, Zn 70–100, and Cu <80–190, Al 700–730, V <70–100, B <300–351, Si 1100–1800, Ni 30, and Cd <10. These findings indicated that the quality of the Zarqa River would not cause hazardous effects. However, this was not the case few years ago due the current protection measures. At present some industries have been relocated from the Zarqa Basin to an area that does not pose any environmental hazards, while the rest of industries remained in the basin, but they have established an on-site treatment plant for industrial waste under the control of Jordanian government, and the enforcement of the environmental protection law. These measures must be monitored and updated by decision makers in a sustainable manner to prevent any water pollution.
Źródło:
Journal of Ecological Engineering; 2022, 23, 2; 108-115
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Basic nutrient requirements of the domestic quails under tropical conditions: A review
Autorzy:
Altine, S.
Sabo, M. N.
Muhammad, N.
Abubakar, A.
Saulawa, L. A.
Powiązania:
https://bibliotekanauki.pl/articles/1182937.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
nutrients
japanese quails
tropical conditions
Opis:
Due to multiple benefits and prolific nature of the domestic quails, a review on basic nutrient requirements is highly relevant. Requirement under tropical conditions for water, protein, essential and non-essential amino acids were reviewed. Other basic requirements that included energy, vitamins, major and micro minerals were also captured.
Źródło:
World Scientific News; 2016, 49, 2; 223-235
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efficient in vitro propagation of Amaranthus viridis L. using node explants
Autorzy:
Jan, T.
Ikramullah
Muhammad, B.
Tariq Mansoor, A.
Zaheerullah
Nawaz, M.A.
Powiązania:
https://bibliotekanauki.pl/articles/12700614.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Opis:
Hyperhydricity is a frequently problem in plants during in vitro culture and affected micropropagation of plants. To develop an efficient in vitro regenerated system without hyperdydricity, we demonstrated the effect of different disinfected agents (mercuric chlorite and hypochlorite), growth regulators, their concentrations and combinations, Agar, pH, ammonium nitrate (NH₄NO₃) and number of subcultures. Mercuric chlorite at 0.07% and exposing time (9–10 min) was appropriate for hygienic culture. The shoots induced by Benzyladnine (BA) alone or in combination with α-Naphthaleneacetic acid (NAA) exhibited maximum multiplication with symptoms of hyperhydricity than those induced by Kinetin alone or in combination with NAA. Hyperhydricity was also reduced by increasing the concentration of agar, pH and elimination of NH₄NO₃ from the macroelements of Murashig and Skoog (MS) medium. Repeated subcultures affected both multiplication and hyperhydricity. The multiplication of shoots increased from parental culture up to 5th subculture and thereafter declined in 6th subculture. Although shoot hyperhydricity were observed from 1st subculture (19%) and then increased up to 85% in 6th subculture. This increased in hyperhydricity could be due to the remaining influence of hormones. In shoots of 5th subculture the content of chlorophyll (dark green) were higher than shoots of 6th subculture.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2020, 19, 4; 41-51
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tuning the Charge Transfer and Optoelectronic Properties of 4,6-Di(Thiophene-2-YL)Pyrimidine via Oligocenothiophene Substitution
Autorzy:
Irfan, A.
Chaudhry, A. R.
Al-Sehemi, A. G.
Muhammad, S.
Jin, R.
Tang, S.
Powiązania:
https://bibliotekanauki.pl/articles/356638.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
organic semiconductors
oligocene
density functional theory
optoelectronic properties
charge transfer properties
Opis:
Five new derivatives of 4,6-di(thiophen-2-yl)pyrimidine (DTP) were designed by structural modification with the aim to tune the electro-optical and charge transfer properties. The effect of oligocene and oligocenothiophene incorporation/substitution was investigated on various properties of interests. The smaller hole reorganization energy revealed that compounds 1-5 might be good hole transfer contenders. The smaller hole reorganization energy of newly designed five DTP derivatives than the pentacene showed that prior compounds might be good/comparable hole transfer materials than/to that of pentacene. The computed electron reorganization energy of DTP derivatives 1-5 are 124, 185, 93, 95 and 189 meV smaller than the meridional-tris (8-hydroxyquinoline) aluminum (mer-Alq3) illuminating that electron mobility of these derivatives might be better/comparable than/to referenced compound.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 4; 1629-1636
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
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