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Tytuł:
Response of different basil varieties to soil salinity
Autorzy:
Said-Al Ahl, H.A.H.
Meawad, A.A.
Abou-Zeid, E.N.
Ali, M.S.
Powiązania:
https://bibliotekanauki.pl/articles/24582.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
pot experiment
basil
Ocimum basilicum var.odoratus
Ocimum basilicum var.alba
Ocimum basilicum var.thyrsiflorum
Ocimum basilicum var.purpurascens
soil salinity
essential oil
eugenol
linalool
Źródło:
International Agrophysics; 2010, 24, 2; 183-188
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antibacterial Activities of Some Transition Metal Schiff Base Complexes
Autorzy:
Islam, M.N.
Shahriar, S.M.S.
Islam, M.K.
Jesmin, M.
Ali, M.M.
Khanam, J.A.
Powiązania:
https://bibliotekanauki.pl/articles/411780.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
antibacterial activity
Schiff base transition metal complexes
minimum inhibitory concentration
Brine shrimp lethality
Opis:
A new series of four transition metal complexes of a Schiff base derived from salicylaldehyde and glycine, viz. [N-salicylidene glycinato diaqua cobalt (II) dimer] (SGCo)2, [N- salicylideneglycinato-di-aqua-nickel(ll)dimer] (SGN)2, [N-salicylideneglycinato-aqua-copper(II)] (SGC) and [N-salicylidene glycinato diaqua zinc(II) dimer] (SGZ)2 have been synthesized and characterized through a rapid, simple, and efficient methodology in excellent yield. These compounds were screened for in vitro antibacterial activities against six pathogenic bacteria, such as Shigella sonnei, Escherichia coli, Bacilus subtilis, Sarcina lutea, Staphylococcus aureus and Pseudomonas arioginosa. The antibacterial activity was determined by the disc diffusion method using DMSO as solvent. The results indicate that (SGC) compound exhibit a significant antibacterial activity, depending on the bacterial strain and (SGCo)2, (SGN)2 and (SGZ)2 compounds show a moderate sensitivity even with higher doses. All these compounds were found to possess cytotoxic effect.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 5; 12-20
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of the optode array representation using optical properties at systole and diastole
Autorzy:
Jumadi, N A
Beng, G K
Mohd-Ali, M. A.
Zahedi, E
Powiązania:
https://bibliotekanauki.pl/articles/173805.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
optical simulation
optical properties
optode array
semi-infinite tissue layer
statistical
analysis
Opis:
The necessity to develop an optode array in order to probe the fetus oxygenation noninvasively regardless of the fetus position has been highlighted in previous literature. In this paper, a series of optical simulations are carried out to determine the best representation of optode array by using optical properties at systolic and diastolic states. The selection is based on the highest flux values accumulated at respective detectors. To accomplish the objective, a homogenous three-layer semi-infinite tissue model is implemented to represent the pregnant woman model. The geometry of the model as well as Monte Carlo simulation are carried out using commercial software, whereas the optical properties related to systolic and diastolic states are defined for all wavelengths. A statistical noise analysis is also introduced in order to find a sufficient number of rays to be launched into the optical tissue system.
Źródło:
Optica Applicata; 2013, 43, 4; 747-759
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Maintenance and management of wastewater system components using the condition index system, prediction process and costs estimation
Konserwacja i zarządzanie systemem kanalizacji ściekowej za pomocą systemu wskaźnika stanu, procesu przewidywania i szacowania kosztów
Autorzy:
Amani, N.
Ali, N. M.
Mohammed, A. H.
Samat, R. A.
Powiązania:
https://bibliotekanauki.pl/articles/302164.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
proces zarządzania konserwacją
instalacja
optymalizacja
analiza kosztów
studium przypadku
maintenance management process
component
optimization
cost analysis
case study
Opis:
Component maintenance management of public building is complex and dynamic as the execution of the engineering management system is subjected to sensitive staff and users' requirements and high expectation of the top management for supporting the business. This paper presents the practices and survey need for maintaining the facilities systems in the building. The purpose of this study is maintenance time optimization of building component using the USACERL condition index (CI) system. To achieve this objective, cast iron pipe within wastewater plumbing system is surveyed using the financial analysis for implementation of optimal maintenance time based on limited cost. The findings show how a best time approach to plumbing system maintenance can assist the owner for decision making in component maintenance time based on existing cost.
Zarządzanie konserwacją instalacji budynku publicznego jest złożone i dynamiczne z uwagi na fakt, iż realizacja systemu zarządzania technicznego poddana jest zarówno wymaganiom personelu i użytkowników końcowych jak i oczekiwaniom kierownictwa w zakresie wsparcia rozwoju przedsiębiorstwa. W niniejszym artykule przedstawiono praktykę oraz badania dotyczące potrzeb wiążących się z konserwacją instalacji w budynkach. Celem tego opracowania jest optymalizacja czasu konserwacji tej części budynku za pomocą systemu wskaźnika stanu (condition index - CI) USACERL. Aby osiągnąć ten cel, przeanalizowano za pomocą analizy finansowej system kanalizacji ściekowej oparty na rurach żeliwnych pod kątem przyjęcia optymalnego czasu obsługi w oparciu o ograniczone koszty. Wyniki pokazują jak optymalne podejście czasowe do konserwacji systemu hydraulicznego może pomóc właścicielowi w procesie podejmowania decyzji w aspekcie czasu konserwacji na podstawie rzeczywistych kosztów.
Źródło:
Eksploatacja i Niezawodność; 2013, 15, 2; 161-168
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Correlation between Solar Flare Phenomena in an X-ray Region and Radio Flux Measurement from January to September 2010
Autorzy:
Hamidi, Z. S.
Shariff, N. N. M.
Ali, M. F.
Monstein, C.
Zulkifli, W. N. A. W.
Ibrahim, M. B.
Arifin, N. S.
Amran, N. A.
Powiązania:
https://bibliotekanauki.pl/articles/411743.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
sun
chromospheres
flares
radio flux
solar activity
Opis:
A short term variation of solar flare in nine months (January 2010 to September 2010) is presented. This paper review and analyze the correlation between radio flux strength measurement and solar flare in the X-ray region. The radio flux measurement data were taken from the National Research Council; Ottawa while hard X-ray emission observed by Royal Observatory of Belgium. The overall range of solar radio flux recorded in this study ranging from 68 x 10-22 Wm-2Hz-1 to 96 x 10-22 Wm-2Hz-1. As there was no class of an X of solar flare reported at all in this study, we can confirm that there are no major effects that happened on Earth and outer space such as Coronal Mass Ejections (CMEs) and solar storms. We concluded that the Sun shows a very minimum activity towards 24th solar cycle.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 9; 84-92
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Simulation for Detecting Nonlinear Echoes from Microbubbles Packets
Autorzy:
Ali, M. G. S.
Elsayed, N. Z.
Eid, E. A.
Powiązania:
https://bibliotekanauki.pl/articles/177697.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
microbubbles packets
harmonic component
acoustic
radial dynamic
pressure spectrum
Opis:
This work presents a simulation of the response of packets of microbubbles in an ultrasonic pulse-echo scan line. Rayleigh-Plesset equation has been used to predict the echo from numerically obtained radial dynamics of microbubbles. Varying the number of scattering microbubbles on the pulse wave form has been discussed. To improve microbubble-specific imaging at high frequencies, the subharmonic and second harmonic signals from individual microbubbles as well as microbubbles packets were simulated as a function of size and pressure. Two different modes of harmonic generation have been distinguished. The strength and bandwidth of the subharmonic component in the scattering spectrum of microbubbles is greater than that of the second harmonic. The pressure spectra provide quantitative and detailed information on the dynamic behaviour of ultrasound contrast agent microbubbles packet.
Źródło:
Archives of Acoustics; 2015, 40, 2; 151-157
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Approach to Design Broadband Air Backed Piezoelectric Sensor
Autorzy:
Ali, M. G. S.
Elsayed, N. Z.
Eid, E. A.
Powiązania:
https://bibliotekanauki.pl/articles/176360.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
piezoelectric
equivalent circuits
impulse response
frequency response
matching layers
z-transform
Opis:
In this work, an approach to the design of broadband thickness-mode piezoelectric transducer is presented. In this approach, simulation of discrete time model of the impulse response of matched and backed piezoelectric transducer is used to design high sensitivity, broad bandwidth, and short-duration impulse response transducers. The effect of matching the performance of transmitting and receiving air backed PZT-5A transducer working into water load is studied. The optimum acoustical characteristics of the quarter wavelength matching layers are determined by a compromise between sensitivity and pulse duration. The thickness of bonding layers is smaller than that of the quarter wavelength matching layers so that they do not change the resonance peak significantly. Our calculations show that the −3 dB air backed transducer bandwidth can be improved considerably by using quarter wavelength matching layers. The computer model developed in this work to predict the behavior of multilayer structures driven by a transient waveform agrees well with measured results. Furthermore, the advantage of this this model over other approaches is that the time signal for optimum set of matching layers can be predicted rapidly.
Źródło:
Archives of Acoustics; 2015, 40, 1; 3-10
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Frequency of hepatitis E and Hepatitis A virus in water sample collected from Faisalabad, Pakistan
Autorzy:
Ahmad, T.
Anjum, S.
Zaidi, N-us-S.S.
Ali, A.
Waqas, M.
Afzal, M.S.
Arshad, N.
Powiązania:
https://bibliotekanauki.pl/articles/50021.pdf
Data publikacji:
2015
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2015, 22, 4
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of operating parameters on production of bio-oil from fast pyrolysis of maize stalk in bubbling fluidized bed reactor
Autorzy:
Ali, N.
Saleem, M.
Shahzad, K.
Hussain, S.
Chughtai, A.
Powiązania:
https://bibliotekanauki.pl/articles/779892.pdf
Data publikacji:
2016
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
fast pyrolysis
bio-oil
temperature
particle size
carrier gas flow rate
maize stalk
Opis:
The yield and composition of pyrolysis products depend on the characteristics of feed stock and process operating parameters. Effect of particle size, reaction temperature and carrier gas flow rate on the yield of bio-oil from fast pyrolysis of Pakistani maize stalk was investigated. Pyrolysis experiments were performed at temperature range of 360-540°C, feed particle size of 1-2 mm and carrier gas flow rate of 7.0-13.0 m3/h (0.61.1 m/s superficial velocity). Bio-oil yield increased with the increase of temperature followed by a decreasing trend. The maximum yield of bio-oil obtained was 42 wt% at a temperature of 490°C with the particle size of around 1.0 mm and carrier gas flow rate of 11.0 m3/h (0.9 m/s superficial velocity). High temperatures resulted in the higher ratios of char and non-condensable gas.
Źródło:
Polish Journal of Chemical Technology; 2016, 18, 3; 88-96
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of chilling exposure and vapor heat treatment duration on the quality of sweet orange during simulated marketing
Autorzy:
Hussain, I.
Rab, A.
Khan, N.U.
Sajid, M.
Ali, N.
Khan, S.M.
Ali, S.
Powiązania:
https://bibliotekanauki.pl/articles/11543553.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Opis:
Sweet orange fruits were exposed to vapor heat treatment (50°C) in water bath for 0, 5, 10, 15 and 20 min in plastic covered structure. The data were recorded on different physico chemical factors immediately after the storage and after seven days simulated marketing under ambient condition (20°C). Low temperature storage enhanced weight loss, surface pitting, disease incidence, total soluble solids accumulation, TSS/Acid ratio but decreased reducing sugars, acidity and ascorbic acid content. Chilling exposure up to 45 days had no significant effect on weight loss and TSS. However, increased weight loss (2.63%), TSS (11.75), TSS/Acid ratio (8.45 ºBrix), disease incidence (8.93%) and lowest reducing sugars (3.90) were noted in sweet orange exposed to chilling temperature for 75 days. Among the VHT durations, the highest weight loss (2.29%) was found in VHT for 0 min while the highest TSS (11.81 ºBrix), TSS/Acid ratio (8.10) and disease incidence (6.22%) and least reducing sugars (4.12%) were found in VHT 20 for min. Vapor heat treatment ranging from 5–10 min resulted in lowest weight loss (1.79%), TSS (10.81 ºBrix) TSS/Acid ratio (7.33), disease incidence (1.00%) and highest reducing sugars (4.75%) in sweet orange fruits. However, non-reducing sugars were least affected by both LTSs and VHTs. It is concluded that the chilling exposure (5°C) beyond 45 days aggravated the decline of fruit physio-chemical quality characteristics. Whereas, VHT with 5–10 min maintained the sweet orange fruit quality during simulated marketing; however, VHT of 15–20 min adversely affected the sweet orange fruit quality attributes.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2017, 16, 5; 39-47
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
In vitro propagation of Althaea officinalis: the role of plant growth regulators in morphogenesis
Autorzy:
Mujib, A.
Pipal, T.
Ali, M.
Tonk, D.
Zafar, N.
Gulzar, B.
Powiązania:
https://bibliotekanauki.pl/articles/79918.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Althaea officinalis
marshmallow
in vitro propagation
clonal multiplication
2,4-dichlorophenoxyacetic acid
plant growth regulator
morphogenesis
rooting
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2017, 98, 3
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Integration of navigation, vision, and arm manipulation towards elevator operation for laboratory transportation system using mobile robots
Autorzy:
Abdulla, A. A.
Ali, M. M.
Stoll, N.
Thurow, K.
Powiązania:
https://bibliotekanauki.pl/articles/384579.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
mobile robot
multi-floor
elevator handler
floor estimation
labware transportation system
kinematic analysis
robotic arm control
object detection
localization
Intel Real sense F200 sensor
Opis:
In the automated environments, mobile robots play an important role to perform different tasks such as objects transportation and material handling. In this paper, a new method for a glassy elevator handling system based on H20 mobile robots is presented to connect distributed life science laboratories in multiple floors. Various labware and tube racks have to be transported to different workstations. Locating of elevator door, entry button detection, internal buttons recognition, robot arm manipulation, current floor estimation, and elevator door status checking are the main operations to realize a successful elevator handling system. The H20 mobile robot has dual arms where each arm consists of 6 revolute joints and a gripper. The gripper has two degrees of freedom. Different sensors have been employed with the robot to handle these operations such as Intel RealSense F200 vision sensor for entry and internal buttons detection with position estimation. A pressure sensor is used for current floor estimation inside the elevator. Also, an ultrasonic proximity distance sensor is utilized for checking the elevator door status. Different strategies including HSL color representation, adaptive binary threshold, optical character recognition, and FIR smoothing filter have been employed for the elevator operations. For pressing operation, a hand camera base and a new elevator finger model are designed. The elevator finger is resolved in a way to fit the arm gripper which is used also to manipulate the labware containers. The Kinematic solution is utilized for controlling the arms’ joints. A server/client socket architecture with TCP/IP command protocol is used for data exchange between Multi-Floor System and the H20 robot arms. Many experiments were conducted in life science laboratories to validate the developed systems. Experimental results prove an efficient performance with high success rate under different lightening condition.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2017, 11, 4; 34-50
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mobile robot transportation for multiple labware with hybrid pose correction in life science laboratories
Autorzy:
Ali, M. M.
Abdulla, A. A.
Stoll, N.
Thurow, K.
Powiązania:
https://bibliotekanauki.pl/articles/384665.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
robot position correction
multiple labware transportation
mobile robot localization
motor encoder
localization error handler
Kinect V2
grasping operation
placing operation
multi-floor
Opis:
In automated working environments, mobile robots can be used for different purposes such as material handling, domestic services, and objects transportation. This work presents a transportation process for multiple labware with hybrid pose correction in life science laboratories using H20 mobile robots. Multiple labware and tube racks, which contain chemical and biological components, have to be transported safely between laboratories on different floors of life science environment. Therefore, an accurate approach for labware transportation is required. The H20 robot has dual arms each consisting of 6 revolute joints with 6-DOF. The problem statement of robot positioning error in front of the workstation is presented. The navigation strategy with its related systems is presented for multi-floor mobile robot transportation environment. A Stargazer module is used as a stable and low-cost mapping and localization sensor with artificial landmarks. An error management system to overcome incorrect stargazer reading problems is presented. Different strategies of pose correction for mobile robots are described. The H20 robot is equipped with sonar sensors and Kinect V2 to be used for labware manipulation and position correction. The Kinect sensor V2 with SURF algorithm (Speeded-Up Robust Features) is used to recognize and localize the target. The communication procedure between the transportation platforms is done using client-server models.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2017, 11, 4; 51-64
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of working capital management on SMEs profitability in Malaysia
Wpływ zarządzania kapitałem pracy na rentowność MŚP w Malezji
Autorzy:
Gorondutse, A. H.
Ali, R. A.
Abubakar, A.
Naalah, M. N. I.
Powiązania:
https://bibliotekanauki.pl/articles/405447.pdf
Data publikacji:
2017
Wydawca:
Politechnika Częstochowska
Tematy:
working capital
working capital management
SMEs
profitability
Malaysia
kapitał obrotowy
zarządzanie kapitałem obrotowym
MŚP
rentowność
Malezja
Opis:
The paper examines the effects of working capital management on Malaysian SMEs profitability within the sight of control factors measured by the size of the firm, leverage, and sales growth. Secondary data was drowned from Companies Commission of Malaysia, database for 66 SMEs in Malaysia for the period between 2006-2012. Panel data regressions were applied in the analysis. Empirical results established a negative effect of working capital administration measures: Stock Turnover in Days, Days Account Receivables, and Cash Conversion Cycle on SMEs benefit intermediaries, Return on Equity (ROE) and Return on Assets. The results also established a positive effect of Net Operating Profit on Cash Conversion Cycle. Furthermore, the study also revealed a positive effect of Days Account Payables on SME’s Return of Asset and Return of Equity, yet having a negative effect on Net operating Profit. The findings imply that profitability of Malaysian SMEs relies upon effective working capital management. The results imply that Profitability of Malaysian SMEs depends upon effective working capital management. The paper contributes empirical evidence on the effect of working capital on Malaysian SMEs.
Artykuł analizuje wpływ zarządzania kapitałem obrotowym na rentowność w MŚP Malezji pod kątem czynników kontrolnych mierzonych wielkością firmy, dźwignią finansową i wzrostem sprzedaży. Wtórne dane zostały uzyskane z Komisji Firm Malezji, bazy danych dla 66 MŚP w Malezji w latach 2006-2012. W analizie zastosowano regresję danych panelowych. Wyniki empiryczne wykazały negatywny wpływ narzędzi zarządzania kapitałem obrotowym: rotacja zapasów w dniach, należności z tytułu dni płatniczych i cykl konwersji gotówki do pośrednikach świadczeń MŚP, zwrot z kapitału własnego i zwrot z aktywów. Wyniki wykazały również pozytywny wpływ operacji netto. Ponadto, badanie wykazało również pozytywny wpływ zobowiązań z tytułu płatności w dniach na zwroty aktywów i zwrotu kapitałów własnych MŚP, co jednak ma negatywny wpływ na zysk netto z działalności operacyjnej. Wyniki badania sugerują, że rentowność malezyjskich MŚP zależy od Zarządzania kapitałem obrotowym. Wyniki sugerują, że rentowność malezyjskich MŚP zależy od skutecznego zarządzania kapitałem obrotowym. Artykuł ten stanowi dowód empiryczny na temat wpływu kapitału obrotowego na malezyjskie MŚP.
Źródło:
Polish Journal of Management Studies; 2017, 16, 2; 99-109
2081-7452
Pojawia się w:
Polish Journal of Management Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An alternative and indirect statistical modeling method for viscosity estimation and its experimental validation for low styrene content polyester resin
Autorzy:
Nawaz, A.
Islam, B.
Ijaz, M. Z.
Saleem, U.
Khattak, M. S.
Ahmad, S. N.
Maqsood, N.
Ali, L.
Powiązania:
https://bibliotekanauki.pl/articles/778495.pdf
Data publikacji:
2018
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
indirect method
polyester resin
statistical relation
Ford viscosity cup
Opis:
We propose an indirect method of ASTM D-1200 for measurement of viscosity from 0.1 to 30 stokes (St) using Ford cup 5 (range 2~ 12 St) by developing a statistical relation. General purpose low styrene content polyester resin (without adding initiator, hardener and accelerator) was used for viscosity measurement. In existing ASTM D 1200 standard, ford cups (1-4) are used to measure the viscosity up to 2 St, while fifth cup is used for measurement from 2 to 12 St. Viscosity above 12 St is not estimated using existing ASTM D- 1200 method. In contrast, our method and statistical relation proposed in this paper estimates viscosity in the flexible range of 0.1 to 30 St by using Ford cup 5 only. The estimated values were confirmed by existing ASTM D-1200 (0.1 to 12 St) and by using Ubbelohde viscometer (12 to 30 St). Values estimated above 12 St are from the proposed model are also in good conformance (percentage error ~ 5% or less) with experimental results. The satisfaction level of the estimated values with the experiments suggests that the model has also the potential for application to paints, polymer and oil industry.
Źródło:
Polish Journal of Chemical Technology; 2018, 20, 4; 60-65
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 22

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