Influence of NaCl Salinity on the Behavior of Hydrolases and Phosphatases in Mulberry Genotypes : Relationship to Salt Tolerance

Anas, S. Shaik Mohamed,Vivekanandan, M. 한국식물학회 2000 Journal of Plant Biology Vol.43 No.4

Two genotypes (Tr4 and Tr10) of mulberry (Morus indica) were cultured using aqueous solutions that contained different concentrations of NaCl (0 to 30 mM). Electrical conductivity (EC) values ranged from 0.52 to 4.60 mS ㎝^-1, with a pH of 7.0. Analyses were conducted to envisage the effects of NaCl salinity on some hydrolytic enzymes. Neither nitrate reductase nor nitrite reductase activities were affected by salt treatment in roots and leaves of either genotype. The activities of β- and α-amylases were higher in leaves than in roots. Both alkaline and acid phosphatases exhibited significant increases in the roots and leaves of Tr4; no such trend was observed in Tr10. The levels of peroxidase and superoxide dismutase increased quite significantly in the leaves as well as the roots of both genotypes. Increased enzymatic activities may suggest a stress-tolerant nature for these genotypes against NaCl toxkity. This was also evidenced by the unaffected levels in percent rooting, chloroplast pigments, osmoprotectants, nitrogenous compounds, and some biomolecules, as had been observed in earlier studies.

In-Situ Temperature Monitoring and Feedback Control in the Gas Tungsten Arc Welding Process

Anas Ullah Khan,Manish Patidar,Yuvraj K. Madhukar 한국정밀공학회 2022 International Journal of Precision Engineering and Vol.23 No.12

An approach has been developed to automate the gas tungsten arc welding (GTAW) process. The process temperature was monitored in-situ and employed to implement feedback control using the infrared ratio pyrometer. The automation of the process was achieved by replacing the foot pedal of the GTAW power source with an in-house developed control system consisting of a data acquisition system and a relay. The GTAW current was made variable automatically to achieve the desired or setpoint temperature. The temperature control is demonstrated for a broad range of 400–1600 °C for both stationary and moving heat source (GTAW torch). The standard deviation from the setpoint temperature was found to be within ± 25 °C for all the cases. It was also implemented for the single-pass bead deposition by feeding a low alloy steel wire to control the bead temperature in the range of 1200–1400 °C at different deposition speeds. The bead geometrical and mechanical properties could be altered by controlling the deposition temperature. The maximum bead width increased, and height decreased with the increase of the deposition temperature at a constant deposition speed. The microhardness was found to decrease by ~ 12% with the increase in deposition temperature from 1200 to 1400 °C, while the deposition speed had a marginal effect.

Effects of Pillar-Based Substrate on the Wire Arc Additive Manufacturing Process

Anas Ullah Khan,Yuvraj K. Madhukar 한국정밀공학회 2021 International Journal of Precision Engineering and Vol.22 No.7

The Wire arc additive manufacturing (WAAM) process uses a metal plate as a substrate for part deposition. The presented work uses small pillars of cuboidal shapes arranged together to form the required deposition surface instead of a single large substrate. The post-processing of WAAM is arduous due to the need for the part removal from the substrate. The pillar-based substrate made this part removal process simpler and reduced the machining requirement. A WAAM setup was designed and developed in-house by integrating the gas metal arc welding (GMAW) with a three-dimensional gantry. The setup was utilised to deposit thin-walled metal parts over the pillar-based substrate. The online recorded temperature at the base using thermocouples confirmed adequate cooling between subsequent layers. The temperature of the pillar-based substrate was compared with the conventional substrate, which ensured proper heat dissipation. The microstructural study and hardness measurement of the deposited parts also confirmed that the pillar-based substrate has little effect on the part quality. The applications of the pillar-based substrate were further extended to demonstrate the deposition of multiple parts on a single substrate and part containing non-planar layers (overhanging features).

The Use of Shear Connectors for Enhancing the Performance of Steel–Concrete Composite Beams: Experimental and Numerical Assessment

Anas Daou,Abdul Rahman Mahayri,Yehia Daou,Oussama Baalbaki,Milad Khatib 한국강구조학회 2021 International Journal of Steel Structures Vol.21 No.6

Structural steel and reinforced concrete are the main materials used in civil structures, and each has its own advantages and disadvantages. Nonetheless, when they are combined together to form a composite material, they result in tremendous advancements. There exist diff erent devices to attain the composite action between steel and concrete among which is the shear stud connector that represents one of the most commonly used methods in composite construction, and it is the scope of this study. This monograph examines the degree of shear connection in steel–concrete composite beams depending on the properties of the shear connectors, where mild and rigid shear connectors where studied. It has been concluded via a non-linear numerical analysis backed by experimental testing that the capacity and the deformation of composite beams depend on the confi guration and the mechanical properties of the shear connectors. Moreover, a simplifi ed model to predict the degree of shear connection and the capacity of the composite beam was proposed.

Determinants of Revisit Intention Among Indonesian Beauty Clinic Customers in Distribution Beauty Clinic Market: The Mediating Role of Trust

Anas HIDAYAT,Binarinta Tirto ANDIKA,Sri Rejeki EKASASI 한국유통과학회 2024 유통과학연구 Vol.22 No.2

Purpose: This study aims to assert trust as an important mediator in the service business. The research topic relates to service businesses that have low exposure to comparative information and weak consumer positions in terms of law, such as the beauty clinic businesses in Indonesia. Research design, data, and methodology: This study uses explanatory and purposive sampling. A survey was conducted among 268 Indonesians, collected by distribution via Google Forms. The hypotheses were tested using AMOS software. Results: The results indicate that trust did not have a significant role in mediating brand awareness, service quality, and price perception on revisit intention, but only mediated satisfaction. Furthermore, this study discloses the neutralization attitude and dissonance behavior represented by trust mediation. Conclusions: These findings attempt to expand the literature on the role of trust in the service business. However, the beauty clinic business in Indonesia infers misbehavior. Misbehavior is caused by vulnerable conditions in which consumers are unable to share their experiences with other consumers. The reason is that the defamation law in Indonesia is often implemented in the wrong direction. This must be corrected so that consumers obtain their rights and create a mutually beneficial relationship between beauty businesses and consumers.

The role of alcohols and diols as co-solvents in fabrication of TON zeolite

Anas Karrar Jamil,Oki Muraza,Adnan M. Al-Amer 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.29 No.-

Numerous industrial catalysts and sorbents require better control of crystal size and morphology of thezeolites. Here, we report a method to selectively control the crystal size and morphology of ZSM-22 byusing alcohols and diols as co-solvents in water–alcohol system. The results demonstrated the role of cosolventin controlling the crystallization growth of ZSM-22 zeolite. Addition of co-solvent suppressednucleation of unwanted cristobalite phase in crystallization and growth of ZSM-22 zeolite. We foundthat alcohols and diols as cheap co-solvent are effective in tuning and controlling crystal size, aspect ratioand co-crystalization phases of zeolite ZSM-22

Photocatalytic degradation of organic dye using titanium dioxide modified with metal and non-metal deposition

Anas, M.,Han, D.,Mahmoud, K.,Park, H.,Abdel-Wahab, A. Pergamon 2016 Materials science in semiconductor processing Vol.41 No.-

In this study, photocatalytic degradation of methyl orange (MO) as an example of organic dye was investigated using different wt% Pd-loaded and N-doped P-25 titanium dioxide (TiO<SUB>2</SUB>) nanoparticles, as example of metal and nonmetal-doped TiO<SUB>2</SUB>, respectively. The Pd-loaded and N-doped TiO<SUB>2</SUB> photocatalysts were prepared by post-incorporation method using K<SUB>2</SUB>PdCl<SUB>4</SUB> and urea, respectively, as precursors. A variety of surface analysis techniques were used for characterization of surface and functional group while using ultraviolet/visible (UV-vis) analysis for monitoring photocatalytic degradation of MO. Kinetic parameters were obtained using Langmuir-Hinshelwood model to determine the degradation rate constants. It was found that the metal-loaded titanium dioxide degraded MO in water at a higher rate than did non-metal-loaded titanium dioxide fabricated by using the post-synthesis method. Also, the pure P25-TiO<SUB>2</SUB> degraded MO more than N-doped TiO<SUB>2</SUB> because of decreased surface area by particle agglomeration after being made by the post-incorporation method.

Various Structural Approaches to Analyze an Aircraft with High Aspect Ratio Wings

Anas El Arras(엘 아라스),Chan Hoon Chung(정찬훈),Young-Ho Na(나영호),SangJoon Shin(신상준) 한국항공우주학회 2011 한국항공우주학회 학술발표회 논문집 Vol.2011 No.11

This paper presents an aeroelastic analysis of an air vehicle with high aspect ratio wings. The first approach emphasizes on the nonlinear behaviors of the wings and the unsteady subsonic aerodynamic forces acting on it. Besides, the second approach uses a one dimensional, Euler-Bernoulli, linear beam. The structural analysis results obtained from both beam models are validated with the 3-D NASTRAN finite elements model. The present model considers two control surfaces and has a taper ratio of 0.5, 21 ribs, and 3 spars. The structural mode shapes and natural frequencies are applied for both the linear and non-linear beams, and then the aerodynamic force is obtained and is compared with the unsteady aerodynamic force that comes from the 3-D model. The forces are obtained using ZAERO and then used to perform the flutter analysis.

Impact of Combined Alignments and Different Weather Conditions on Vehicle Rollovers

Anas Alrejjal,Khaled Ksaibati 대한토목학회 2022 KSCE JOURNAL OF CIVIL ENGINEERING Vol.26 No.2

Combined horizontal and vertical alignments are frequently utilized in mountainous interstates in Wyoming. These challenging terrain conditions, coupled with adverse weather conditions, affect vehicle stability and may lead to hazards. There is a dearth of research on systematically examining the effects of different combined alignments on safety in terms of rollover propensity including their interactions. Researchers resorted to observational methods that inhibited the control of key variables. Instead, vehicle dynamics simulation modeling was employed to investigate the rollover propensity of vehicles navigating curves of varying geometric design and environmental characteristics. Instead of simulating the full range of curve geometries throughout this study, we considered the most critical curves that were identified as areas of concern. A multinomial regression model was then developed to further quantify the impact of several key factors in terms of roll stability. Results show that: 1) tight degrees of curvature and steep downgrades raised the lateral acceleration and, with higher operating speeds, the impact was more critical. 2) Compared to passenger cars and sports utility vehicles (SUVs), the highest lateral acceleration was acting on semi-trailer trucks. Moreover, SUVs and semi-trailer trucks decrease the rollover margins compared to passenger cars by 0.144 and 0.158 respectively. The study provides new insights regarding the impact of various interactions between the factors, particularly when applying brakes. The study provides a safety assessment for curves’ speed limits that could assist Wyoming Department of Transportation (WYDOT) in assigning appropriate speed limits. To the best of the authors’ knowledge, no previous studies were conducted to investigate these impacts for combined curves. This study is beneficial to transportation agencies in Wyoming and all other locations that are characterized by mountainous terrain since hazardous sections, having combined horizontal and vertical curves, were identified. Also, situations that require additional attention from law enforcement agencies are pinpointed.

The Relationship between Accounting Conservatism and Earning Management in Emerging Markets: The Moderating Role of Size

Anas Ghazalat,Jamal Abu-Serdaneh,Haifa Majaly 대한산업공학회 2023 Industrial Engineeering & Management Systems Vol.22 No.2