Effects of a new generation of fish protein hydrolysate on performance, intestinal microbiology, and immunity of broiler chickens

Amir Hossein Alizadeh-Ghamsari,Amir Reza Shaviklo,Seyyed Abdullah Hosseini 한국축산학회 2023 한국축산학회지 Vol.65 No.4

This study was conducted to evaluate the effects of co-dried fish protein hydrolysate (CFPH) on broilers performance, intestinal microbiology, and cellular immune responses. Five hundred one-day-old (Ross 308) male broilers were allocated to four treatments with five replicates of 25 birds in a completely randomized design. The experimental treatments included four levels of CFPH (0% as the control, 2.5%, 5%, and 7.5%) in the isonitrogenous and isocaloric diets. During the experiment, body weight (BW) and feed intake (FI) were periodically recorded in addition to calculating average daily gain (ADG), feed conversion ratio (FCR), liveability index, and European broiler index (EBI). In addition, cellular immune responses were evaluated at 30 days of age. On day 42, ileal contents were obtained to examine the microbial population. Based on the findings, Dietary supplementation of 5 and 7.5% CFPH increased the percentage of the thigh while decreasing the relative weight of the gizzard compared to the control group. The highest relative length of jejunum was observed in birds receiving 2.5 and 5% CFPH, and its highest relative weight belonged to birds fed with 5% CFPH. The number of coliforms, enterobacters, and total gram-negative bacteria in the intestines of birds receiving CFPH was less than that of the control group. In general, the application of CFPH in broiler nutrition can decrease the level of soybean meal in diet and it can be considered as a new protein supplement in poultry production. It is suggested to study the incorporation of this new supplement in other livestock’s diets.

Assessment of temporal shifting of PM2.5, lockdown effect, and influences of seasonal meteorological factors over the fastestgrowing megacity, Dhaka

Abdullah-Al- Faisal,Abdulla - Al Kafy,Md. Abdul Fattah,Dewan Md. Amir Jahir,Abdullah Al Rakib,Zullyadini A. Rahaman,Jannatul Ferdousi,Xiao Huang 대한공간정보학회 2022 Spatial Information Research Vol.30 No.3

Dhaka is subjected to high pollution levels throughout the year, holding some relatively high amounts of pollution readings, making its air unhealthy to breathe. The study examined hourly, shifting, seasonal fluctuations in particulate matter (PM2.5), the effects of seasonal meteorological variables, and the lockdown effect over the megacity of Dhaka from 2019 to 2021 using data from AirNow. The results indicate the daily average PM2.5 concentration between 2019 and 2021 was 112.49 lg/m3, about four times higher than the WHO limit and two times higher than the Bangladesh standard. Daily PM2.5 concentrations was high during morning and evening pick-up hours, reaching a maximum hourly concentration of 472.9 lg/m3 in February 2020. The maximum average PM2.5 concentration was 211.23 lg/m3 in March 2021 (winter season), and the lowest average was 27.58 lg/m3 in August 2020 (rainy season). The Pearson correlation coefficient (r) between the PM2.5 and meteorological variables were inverse with rainfall (- 0.62), temperature (- 0.73), humidity (- 0.82), but positive with wind (0.09). Daily average Air Quality Index (AQI) concentrations improved from 108.53 to 67.99 lg/m3 during the lockdown period. Finally, the study recommended many mitigation strategies that might assist accountable authorities in lowering the number of life-threatening components in the air.

Study of the Behavior of Ultrasonic Piezo-Ceramic Actuators by Simulations

Amir Abdullah,Abbas Pak,Mohammad Mahdi Abdullah,Alireza Shahidi,Massoud Malaki 대한금속·재료학회 2014 ELECTRONIC MATERIALS LETTERS Vol.10 No.1

In recent years, there has been a growing interest in the simulation and analysis of piezoelectric transducers with the he help of equivalent electrical circuit simulations (EECS). This paper has been devoted to study of such approach for two designed and fabricated ultrasonic sandwich transducers. By using analytical analysis, the dimensions of components of the two piezoelectric transducers were determined for the assumed resonance frequencies of 30 kHz and 40 kHz. Then, by using a two dimensional finite element model, and regarding two different modeling techniques for the transducers and by application of a current source which was connected directly to the piezoelectric pieces of the actuators, transient analysis and harmonic analysis were performed with the help of finite element method (FEM). The results obtained were lumped-parameter equivalent electrical circuit; resonance and anti-resonance frequencies; voltage, current and equivalent impedance variations against driving frequency and force factor. Finally, simulation and experimental results were compared.

Experimental Study on Ultrasonic Use in Dry Creep-Feed Up-Grinding of Aluminum 7075 and Steel X210Cr12

Amir Abdullah,Mohammad Sotoodezadeh,Rezvan Abedini,Vahid Fartashvand 한국정밀공학회 2013 International Journal of Precision Engineering and Vol. No.

Ultrasonic vibration has shown capability of reducing friction forces in shearing within the material and on the contacting faces of pieces. To decrease the risk of thermal damages in creep-feed grinding, ultrasonic vibration (as a lubricant) was given to Aluminum 7075 and to Steel X210Cr12 workpieces in the direction of feed movement in dry creep-feed up-grinding while using vitrified aluminum oxide wheel. Grinding forces and surface quality are compared. It was found that under ultrasonic, without using coolant,the grinding forces were reduced and surface quality was improved. Under no ultrasonic sever thermal over-cut and burns were observed on steel, whilst there was no sign of such effects on aluminum.

Effective Ground Mapping for Autonomous Excavation

Abdullah Rasu,Amir Khajepour,Jaho Seo 제어로봇시스템학회 2021 제어로봇시스템학회 국제학술대회 논문집 Vol.2021 No.10

The accurate and detailed sensing information of the excavated ground is a prerequisite for successful autonomous excavation. For this issue, our study proposes efficient methodologies for ground mapping that can generate a reconstructed map to deal with sensor occlusion and a 5D map beyond a normal 3D map to provide the various ground information at excavation sites. For the map reconstruction, exteroceptive and proprioceptive data were merged for occlusion areas. The 5D map was created using the information of 3D geometry, Lidar’s intensity, and ground force index. Experimental tests using a mini excavator were carried out to validate the proposed methodologies.

Survival Rate of Breast Cancer Patients In Malaysia: A Population-based Study

Abdullah, Nor Aini,Mahiyuddin, Wan Rozita Wan,Muhammad, Nor Asiah,Ali, Zainudin Mohamad,Ibrahim, Lailanor,Tamim, Nor Saleha Ibrahim,Mustafa, Amal Nasir,Kamaluddin, Muhammad Amir Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.8

Breast cancer is the most common cancer among Malaysian women. Other than hospital-based results, there are no documented population-based survival rates of Malaysian women for breast cancers. This populationbased retrospective cohort study was therefore conducted. Data were obtained from Health Informatics Centre, Ministry of Health Malaysia, National Cancer Registry and National Registration Department for the period from $1^{st}$ January 2000 to $31^{st}$ December 2005. Cases were captured by ICD-10 and linked to death certificates to identify the status. Only complete data were analysed. Survival time was calculated from the estimated date of diagnosis to the date of death or date of loss to follow-up. Observed survival rates were estimated by Kaplan-Meier method using SPSS Statistical Software version 17. A total of 10,230 complete data sets were analysed. The mean age at diagnosis was 50.6 years old. The overall 5-year survival rate was 49% with median survival time of 68.1 months. Indian women had a higher survival rate of 54% compared to Chinese women (49%) and Malays (45%). The overall 5-year survival rate of breast cancer patient among Malaysian women was still low for the cohort of 2000 to 2005 as compared to survival rates in developed nations. Therefore, it is necessary to enhance the strategies for early detection and intervention.

Experimental and Numerical Investigation on the macroscopic characteristics of the jet discharging from gaseous direct injector

Alireza Hajialimohammadi,Amir Abdullah,Mostafa AghaMirsalim,Iman Chitsaz 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.2

Injector design is one of the main challenges for development of direct injection and partially stratified gaseous engines. Characteristicsof discharged spray from direct gaseous injector influence on combustion and emissions of these engines. In this work axial and radial(lateral) penetration of transient jet of direct gaseous injector are investigated for different nozzle diameters and different pressureratios numerically and experimentally. High speed Schlieren imaging method is used for jet visualization and image processing techniqueis utilized for analyzing the images and extracting jet boundaries and its axial and radial penetrations. Finite volume based software isused for numerical calculations. Measuring of the axial and radial penetrations for different cases referred to in this paper provides moreaccurate formulation for the mentioned parameters for transient direct injection gaseous jet discharged from the injector. Experimentaland numerical findings show that higher axial penetrations for larger diameters of nozzle and higher pressure ratios are achievable. Smaller diameter of nozzle gives higher relative lateral expansion while there is no specific distinction for different pressure ratios. Resultsshow that the ratio of radial to axial penetration for transient jet is decreased by time and reaches to a constant value of 0.33±0.05and the normalized jet axial penetration has a linear dependency on the square root of time for all cases with slope of 2.9±0.4.

Development Of Smart Soft-Sensor And Key Variable Selection For Determining Total Nitrogen And Total Phosphorus In Rivers Using Deep Transformer Ai Model

Abdulrahman Hussein Abdullah B(Abdulrahman H. Ba-Alawi),Changkyoo Yoo(유창규),Amir Saman Tayerani Charmchi,Kijeon Nam(남기전),Minhan Kim(김민한),Dongchan Won(원동찬) 대한환경공학회 2021 대한환경공학회 학술발표논문집 Vol.2021 No.11

Highly sensitive and selective detection of Bis-phenol A based on hydroxyapatite decorated reduced graphene oxide nanocomposites

Alam, Mohammad K.,Rahman, Mohammed M.,Elzwawy, Amir,Torati, Sri Ramulu,Islam, Mohammad S.,Todo, Mitsugu,Asiri, Abdullah M.,Kim, Dojin,Kim, CheolGi Elsevier 2017 ELECTROCHIMICA ACTA Vol.241 No.-

<P><B>Abstract</B></P> <P>A facile and cost effective chemical reduction method is employed for the preparation of reduced graphene oxide/hydroxyapatite (rGO/HAp) nanocomposites. The transmission electron microscopy images revealed that the HAp flakes are well decorated on the surface of rGO. The morphological structure of the as-synthesized rGO/HAp nanocomposites was confirmed through X-ray diffraction, Fourier transform infrared spectroscopy and Raman spectroscopy, while the composition and thermal stability were analyzed by energy dispersive spectra and thermogravimetric analysis, respectively. Furthermore, the effect of rGO/HAp nanocomposites for the proliferation of Human Mesenchymal Stem Cell (hMSC) was performed to confirm the biocompatibility. A selective chemical sensor based on rGO/HAp modified glassy carbon electrode (GCE) for sensitive detection of Bis-phenol A (BPA) has been developed. Several important parameters controlling the performance of the BPA chemi-sensor were investigated and optimized at room conditions. The rGO/HAp/Nafion/GCE sensor offers a fast response and highly sensitive BPA detection. Under the optimal conditions, a linear range from 0.2nmolL<SUP>−1</SUP> to 2.0mmolL<SUP>−1</SUP> for the detection of BPA was observed with the detection limit of 60.0pmolL<SUP>−1</SUP> (signal-to-noise ratio, at an SNR of 3) and sensitivity of 18.98×10<SUP>4</SUP> μA.L/μmol.m<SUP>2</SUP>. Meanwhile, the fabricated chemi-sensor showed an excellent, specific and selective recognition to target BPA molecules among coexistence of other analytes in the buffer system. This novel effort initiated a well-organized way of efficient rGO/HAp/Nafion/GCE sensor development and practically analyzed the real hazardous environmental pollutants at room conditions.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Simple chemical reduction method was used for preparation of reduced graphene oxide/hydroxyapatite (rGO/HAp) nanocomposites. </LI> <LI> The rGO/HAp nanocomposites exhibited good biocompatibility with hMSCs. </LI> <LI> Selective chemical sensor based on rGO/HAp nanocomposites was developed for detection of Bis-phenol A. </LI> <LI> The fabricated rGO/HAp/Nafion/GCE sensor exhibited good detection limit of 60pmolL<SUP>−1</SUP>. </LI> </UL> </P>

Precision Control of a Piezo-Actuated Micro Telemanipulation System

Mohammad Zareinejad,Saeed Shiry Ghidary,Seyed Mehdi Rezaei,Amir Abdullah 한국정밀공학회 2010 International Journal of Precision Engineering and Vol.11 No.1

Piezoelectric actuators are widely used in micro manipulation applications. However hysteresis nonlinearity limits accuracy of these actuators. This paper presents a novel approach for utilizing a piezoelectric nano-stage as slave manipulator of a teleoperation system. The Prandtl-Ishlinskii (PI) model is used to model actuator hysteresis in feedforward scheme to cancel out this nonlinearity. To deal with the influence of parametric uncertainties,unmodeled dynamics, and PI identification error a perturbation term is added to the slave model and apply a sliding mode based impedance control with perturbation estimation. The stability of the entire system is guaranteed by Llewellyn's absolute stability criterion. Performance of the proposed controllers is verified through experiments.