Elsayed Talaat Mohamed Helmy
@niof-eg.com
Environment Division
National Institute of Oceanography and Fisheries,
RESEARCH INTERESTS
Materials Science
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Mohamed A. Ayyad, Mona A. Ali, Elsayed T. Helmy, and Usama A. Soliman
Springer Science and Business Media LLC
AbstractEconomically speaking, rodents possess a serious threat to the agriculture sector. One of these organisms that directly threaten agriculture, stocks, and others is the Norway rat, Rattus norvegicus (R. norvegicus). The 2-cyano-N-(1H-1,2,4-triazol-3-yl) acetamide (1) was used as a precursor to give 2-cyano-3-(dimethylamino)-N-(1H-1,2,4-triazol-3-yl) acrylamide (2) and ethyl 2-amino-5-cyano-1,6-dihydro-6-oxo-1-(1H-1,2,4-triazol-3-yl) pyridine-3-carboxylate (3). Infra-red, 1H-NMR, 13C-NMR, MS, and elemental analysis were done for the precise structure elucidation of the applied synthons. The prepared compounds were tested as potential rodenticides against the Norway rat, Rattus norvegicus. Toxicity analysis using four serial doses of both prepared compounds revealed that the LD50 values were 160.6 and 391.7 mg/kg body weight, for ethyl 2-amino-5-cyano-1,6-dihydro-6-oxo-1-(1H-1,2,4-triazol-3-yl) pyridine-3-carboxylate (3) and 2-cyano-N-(1H-1,2,4-triazol-3-yl) acetamide (1), respectively. Several biological variables, such as alanine transaminase (ALT), aspartate transaminase (AST), serum urea, creatinine, and total protein, have been assessed and evaluated as biological response indicators. Analysis revealed a highly significant increase in both AST, ALT, urea, and creatinine levels, while the total protein level showed a considerable reduction in treated rats exposed to 2-cyano-N-(1H-1,2,4-triazol-3-yl) acetamide (1) and ethyl 2-amino-5-cyano-1,6-dihydro-6-oxo-1-(1H-1,2,4-triazol-3-yl) pyridine-3-carboxylate (3) when compared to the control treatment. Liver histological examination showed structural changes in the form of congestion in the central vein, necrosis in some hepatic regions, and pyknotic nuclei, while kidney histological examination showed vacuolar degeneration of the epithelial cells of some convoluted tubules and the disappearance of some glomeruli and other marked atrophies. Necrosis in some areas was noticed. Field application through bait consumption took place with a satisfactory reduction of 68.4% for ethyl 2-amino-5-cyano-1,6-dihydro-6-oxo-1-(1H-1,2,4-triazol-3-yl) pyridine-3-carboxylate (3), while it was 61.9% for 2-cyano-N-(1H-1,2,4-triazol-3-yl) acetamide (1) when compared to the recommended Zinc phosphide commercial rodenticide that poses an 81% reduction. Graphic abstract
Elsayed T. Helmy, Mohamed A. Ayyad, Mona A. Ali, H. G. Mohamedbakr, and Jia Hong Pan
American Chemical Society (ACS)
Eobania vermiculata is a hazardous snail that can damage ornamental plants and cause significant harm to plant sections in Egyptian areas. Herein, the molluscicidal activity of CuPb-Ferrite/TiO2 and TiO2 nanoparticles (NPs) against E. vermiculata was evaluated using the poisonous bait method. LC50 values were determined using the leaf dipping and contact methods, with values of 631.23 and 1703.49 ppm for CuPb-Ferrite/TiO2 and 193.67 and 574.97 ppm for TiO2. Exposure to both NPs resulted in a significant increase in the biochemical parameters of alanine aminotransferase (ALT), aspartate aminotransferase (AST), and alkaline phosphatase (ALP), as well as a decrease in total protein (TP) percentage of E. vermiculata. Histological examinations revealed that many digestive cells had ruptured, and their contents had been lost, while the foot's epithelial layer became ruptured. The average reduction was 66.36% for CuPb-Ferrite/TiO2 NPs compared to the recommended molluscicide, Neomyl, with a 70.23% reduction in the field application. Electrophoretic separation of total protein using sodium dodecyl sulfate-polyacrylamide gel electrophoresis after treatment with LC50 concentrations of TiO2 and CuPb-Ferrite/TiO2 demonstrated the potency of these synthetic compounds as molluscicidal agents. Therefore, we recommend the use of CuPb-Ferrite/TiO2 NPs as a novel land snail molluscicide because it is safe to use, and the baits are arranged to not affect irrigation water, with a high molluscicidal effect.
Monika Malhotra, Komal Poonia, Pardeep Singh, Aftab Aslam Parwaz Khan, Pankaj Thakur, Quyet Van Le, Elsayed T. Helmy, Tansir Ahamad, Van-Huy Nguyen, Sourbh Thakur,et al.
Elsevier BV
Elsayed T. Helmy, Usama A. Soliman, A. M. Elbasiony, and Ba-Son Nguyen
Springer Science and Business Media LLC
AbstractIn this work, a magnetically separated photocatalyst with great efficiency CuCe-Ferrite/TiO2 composite was prepared and characterized by X-ray diffraction (XRD), UV–Vis spectrophotometry, Fourier transformer infra-red spectroscopy (FTIR), field emission scanning electron microscopy (FE-SEM), high resolution transmission electron microscopy (HR-TEM), energy dispersive X-ray spectroscopy (EDX) and vibrating sample magnetometer (VSM). Single-phase cubic spinel was formed by calcining the prepared sample at a temperature of 550 °C, according to the results. Different concentrations of reactive red 250 (RR250) dye photodegradation was evaluated using different doses of CuCe-ferrite/ TiO2 and TiO2 NPs. Higher efficiency of RR250 photodegradation up to 100% was obtained using CuCe-ferrite/ TiO2. The photodegradation efficiency was confirmed using chemical oxygen demand (COD) test of both treated and untreated samples. The oxidation process was mostly mediated by photogenerated .O2− according to scavenger test results. The catalyst possess higher photodegradation efficiency even after regeneration for ten times. Graphical Abstract
Mina Guli, Elsayed T. Helmy, Jenny Schneider, Gui Lu, and Jia Hong Pan
Springer Science and Business Media LLC
Elsayed T. Helmy, Mona A. Ali, Mohamed A. Ayyad, H.G. Mohamedbakr, Rajender S. Varma, and Jia Hong Pan
Elsevier BV
Van-Huy Nguyen, Pardeep Singh, Anita Sudhaik, Pankaj Raizada, Quyet Van Le, and Elsayed T. Helmy
Elsevier BV
ELSAYED T HELMY, AHMED EL NEMR, ESAM ARAFA, SHADY ELDAFRAWY, and MAHMOUD MOUSA
Springer Science and Business Media LLC
Because of simplicity, eco-friendly and attracting of scientific community, pure and non-metal-doped TiO 2 nanoparticles (NPs) photocatalysts: TiO 2 (T), C-TiO 2 (CT), N-TiO 2 (NT), S-TiO 2 (ST) and C, N, S-TiO 2 (CNST) were prepared by aqueous mangrove extract via sol–gel method. The materials were characterized by XRD, FTIR, UV–Vis absorption spectroscopy, BET, SEM, TEM, EDX, XPS, EIS and PEC. The results indicated that the planned photocatalysts exhibit an anatase crystal phase with a particle size in the range of 20–37 nm. The non-metal doping induces a redshift of optical absorption edge, and exhibits a strong visible light absorption. The photoluminescence intensity emission follows the order: T > CT > ST > NT > CNST, whereas the photocatalytic activity (PCA) increases in the reverse order. The PCA was assessed by photodegradation of two organic dyes, reactive blue 19 (B19) and red 76 (R76) under visible light illumination. The enhancement in visible PCA followed the order CNST > NT > ST > CT > T. The photocatalytic degradation efficiency of the dyes using the CNST sample reached 100% after 60 min of irradiation. The most active species in the photocatalytic processes are the positive holes. The solid photocatalysts were recycled five times without losing its activity. The chemical oxygen demand test confirmed that the CNST is the best photocatalyst of the investigated samples. Overall, the greenly synthesized NPs demonstrated the outstanding potential of green product for treating contaminated water by both B19 and R76 dyes under visible light illumination.
Abdul Latif, Hendro Agus Widodo, Rachmad Andri Atmoko, Thanh Nguyen Phong, and Elsayed T.Helmy
Universitas Muhammadiyah Yogyakarta
Baby incubator is very important to keep the newborn’s body temperature especially for premature babies. The research aimed to design a baby incubator with controlled temperature and humidity. The incubator is designed to have a length of 60 cm, a width of 40 cm, and a height of 30 cm. System of baby incubator will automatically turn on or turn off the fan and or heating in accordance with the normal range of temperature and humidity in the incubator. The normal limits of temperature used is 33°C to 35°C. While the normal limits of air humidity in the incubator used is between 40% and 60%. Data acquisition system consists of temperature and humidity sensor, microcontroller ATmega8535, fan, heater, and LCD. LCD is used to display the results of measurements of temperature and humidity. Heater is used to regulate the temperature in the incubator. While fan is used to regulate the humidity in the incubator. Test results show that the heater will turn on if the temperature is below the limits of 33°C. While the fan will turn on if the humidity is above 60%
Elsayed T. Helmy, Elsayed M. Abouellef, Usama A. Soliman, and Jia Hong Pan
Elsevier BV
Visible-light-responsible S-doped TiO2(GST) nanoparticles (NPs) are synthesized via sol-gel process, and an aqueous extract of Malva parviflora (MP) plant is used as the green and versatile medium with excellent reducing and capping properties to facilitate the S-doping and crystal growth of anatase. Compared with the counterpart (CST) derived from the conventional organic solvent. GST show a smaller average particle size (20.3 vs. 29.5 nm) with a larger surface area (135 vs 95 m2/g), together with the more significant red shift to longer wavelength in the visible light region. XPS analysis shows Ti4+ cations are substituted by S6+ ions into the lattice structure of TiO2 for both samples. The photodynamics of CST and GST catalysts are examined by electron paramagnetic resonance (EPR) spectroscopy, which shows the surface Ti3+ sites can be oxidized easily by the surface adsorbed O2 molecules, forming O2- radicals. Their photocatalytic activities (PCA) are evaluated by degrading methyl orange (MO) dye under the visible light irradiation. GST exhibit higher PCA in MO bleaching and chemical oxygen demand (COD) reduction. In addition, antimicrobial and antioxidant assays of CST and GST NPs also show that the irradiated NPs samples show higher antibacterial activities. GST NPs have a higher antibacterial activity than CST NPs against all tested bacteria and the minimum inhibitory concentration (MIC) is optimized to 25 μg/mL. The in-vitro antioxidant activity evaluated by the radical cation de-colorization test using 1,1-diphenyl-2-picrylhydrazyl (DPPH) further demonstrates that GST NPs give a better antioxidant activity.
Abdul Latif, Afif Zuhri Arfianto, Joessianto Eko Poetro, Thanh Nguyen Phong, and Elsayed T.Helmy
Universitas Muhammadiyah Yogyakarta
An incubator room is conditioned to keep the temperature warm so the baby feels comfortable. A temperature monitor system for incubator room placed separately from where the officer works is a hassle. It wastes time. Temperature detector design for infant incubator which has constant temperature is necessary. An LM35 sensor as temperature detector was used in the design. The sensor was installed in a 100 x 80 cm room. The detected temperature was displayed on the LCD and computer in the staff room. Temperature (°C) is converted by an Arduino Uno microcontroller into an ADC (Analog Digital to Converter) value. Several LM35 sensors were mounted in rooms to detect the temperature. The LM 35 sensor was used by considering that it can be calibrated directly in the Celsius scale, a linear scale factor of 10mV/°C and has temperature range between -55 ° C and 150 ° C .
Abdul Latif, Afif Zuhri Arfianto, Hendro Agus Widodo, Robbi Rahim, and Elsayed T.Helmy
Universitas Muhammadiyah Yogyakarta
The goal of the research was to develop a Proportional Integral Derivative (PID) control DC motor system as a Matlab-based driver mini conveyor to discover how to regulate speed on an actual mini conveyor where certain factors that impact the research are not considered 0. The hardware configuration of the mini conveyor used hollow steel as a frame and two copies of the roller belt for the stretch belt conveyor. The PID control system used an empirical approach to get the DC motor's response system to determine the best fit of proportional gain, integral gain and derivative gain, and then implement those PID control systems using Matlab and Arduino as the tools for data acquisition. The speed sensor (Rotary Encoder) was mounted on the roller belt to accurately gain read speed. This sensor will submit data on every increasing in PWM to accurately measure the speed and control speed at the same time, based on the set points. The consequence of this work was the proportional gain values = 0.94624747, the Integral gain = 51.4023958 and the derivative gain = 0.01941504. The PID control, designed to monitor the response of motor DC speed on this research, had successfully reached set point value and decreased steady state error from 47.16 percent to 1.015188 percent (unloaded) and 2.2020751 percent (loaded) on the real response device.
Prisma Megantoro, Geston Bakti Muntoha, Kunal Kunal, Phong Thanlr Nguyen, and Elsaved Helmy
Universitas Muhammadiyah Yogyakarta
Abstract — This study uses 2 variations of the value of the DC 12V LED lamp power that is 12W and 15W with 3 different brands of lamp variations. Measurement of input voltage and current is carried out using a Krisbow KW06-490 DC clampmeter that has been calibrated as a standard measuring instrument and a Krisbow KW06-491 DC clampmeter that has not been calibrated as a test gauge 1 and a Multimeter Viper DT830B that has not been calibrated as a test gauge 2. Data the current and input voltage between each lamp and different lamp brands are used to calculate the value of the test lamp power and then compare it. The big conclusion from this study was found that the error value between the value of the test power or the use of DC 12V LED lamps with 12W written power on R, S, and T brand lamps was ± 51.67%, ± 70.75%, ± 61.33 %. In 15W lamps the brands R, S, and T were ± 7.20%, ± 0.53%, ± 8.27%.
Tatiya Padang Tunggal, Lailicia Anggi Kirana, Afif Zuhri Arfianto, Elsayed T. Helmy, and Farhad Waseel
Universitas Muhammadiyah Yogyakarta
Calibration is required for various kinds of tools from kitchen tools such as stirrers or mixers to medical tools such as temperature calibration, ECG, blood pressure, and other instrumentation tools to be according to the required standards. In medical devices, a digital tachometer has been used as a calibration support device to measure the speed of objects that rotate in RPM on the centrifuge. Some medical devices are calibrated in km/hour, for example, the ergo cycle and treadmill. Two different devices or a conversion from RPM to km/hour are required. The research aimed to design a measurement device that performed calibration of devices with different units, namely tachometer that can be used to measure speed in RPM and km/hr. Based on the research objective, a tool was made to measure the motor's rotational speed using the E18-D80NK sensor, microcontroller, and LCD without touching the object being measured.
Nur Hudha Wijaya, Fajar Ahmad Fauzi, Elsayed T.Helmy, Phong Thanh Nguyen, and Rachmad Andri Atmoko
Universitas Muhammadiyah Yogyakarta
This research will discuss health services in the role of diagnostics and life support. The system designed is a system that is able to provide information on the user's health condition, in this case, is a measure of heart rate and body temperature. In taking heart rate data using a heart rate sensor (fingertip sensor). This system works taking data from the blood flow on the index finger for the 60s, the data will be displayed through the LCD. For body temperature parameters the data collection uses the LM35 temperature sensor. Changes in sensor heat will be converted into electricity, which is translated into digital form through a 10-bit ADC that is processed by the ATMega 16 microcontroller and displayed to the LCD. The results of an ideal measurement show the error of each parameter heart rate and body temperature min <1.702% and <0.55%
Elsayed Abouelleef and Elsayed Helmy
Egypts Presidential Specialized Council for Education and Scientific Research
Abstract: The solubility is one of the vital parameters to attain the specified concentration of the drug in circulation for the desired (anticipated) pharmacologic response. This work aimed to calculate ion-solvent interaction, the density of ethanol-water (EtOH-H2O) mixtures; the density of oxytetracycline (OTC) saturated solutions, different volumes of solvation (Van der Waals volume, molar volume and electrostriction volume and solvated radii (ro)) from solubility data. It was found that; the activity coefficient (γ_±) of OTC were decreased by increasing the EtOH content in (EtOH-H2O) mixture used and also the logγ_± decrease within the rise in temperature. The densities and also the molar volume of OTC decrease by increasing the quantitative ratio of EtOH and also was increased by rising in temperature. The electrostriction volumes and therefore the solvated radii (ro) of OTC are increased as the EtOH content increase and also are increased by the rise in temperature.
Nur Hudha , ,, Wijaya, Zanella Oktavihandani, Kunal Kunal, Elsayed T.Helmy, and Phong Thanh Nguyen
Universitas Muhammadiyah Yogyakarta
Measuring body temperature depends on the type of thermometer and measured body area. A thermometer placed on the tympanic membrane is considered ideal because the tympanic membrane and hypothalamus have arterial blood supply originating from the carotid artery (neck). Therefore, it is considered directly close to the core temperature. The Tympani Thermometer with external storage can facilitate the doctor's performance in diagnosing patients. This tool is designed using the MLX90614 sensor as a passive infrared sensor that can receive infrared energy from the tympanic membrane. The study aims to design a tympani thermometer. It compared the measurement results of the designed tool with ear thermometers that have been calibrated to get the error value. Based on the results, this prototype works well and has an error of 0.7°C in the left ear and an error of 0.24°C in the right ear.
Tatiya Padang Tunggal, Ahmad Wahyu Apriandi, Joessianto Eko Poetro, Elsayed T.Helmy, and Farhad Waseel
Universitas Muhammadiyah Yogyakarta
In everyday life, particularly in hospitals, people typically use cloth or tissue to dry our hands. It seems less practical, effective and hygienic. In addition, some restaurants still use cloth or tissue as well. To overcome this problem, several hospitals and restaurants have provided hand dryers. It can dry hands but cannot eliminate germs or bacteria. It is necessary to create a hand dryer equipped with a sterilizer. This work, therefore, created a hand dryer that can simultaneously dry and sterilize hands that worked automatically using the ATMega8 microcontroller. The tool was designed by using an infrared sensor to detect hands, and an ATMEGA8 microcontroller to read and process the sensors to activate UV and heating. The results found that the tool equipped with UV and heating can dry hands while eliminating bacteria and germs.
Ahmed El Nemr, Elsayed T. Helmy, Esam A. Gomaa, Shady Eldafrawy, and Mahmoud Mousa
Elsevier BV
Abstract The present study reports an eco-friendly, rapid and easy method for the synthesis of TiO2, C-doped TiO2(C-TiO2), S-doped TiO2 (S-TiO2) and C, S co-doped TiO2(C,S-TiO2) nanoparticles (NPs) via Eichhornia aqueous extract using the sol-gel method. The prepared samples were characterized by XRD, SEM, FTIR, EDX, XPS, Photoluminescence (PL), photoelectric current (PEC) and UV–vis absorption techniques. Under visible lamination, the synthesized NPs have a great photocatalytic activity for the degradation of the Reactive Blue 19 (RB19) and the Reactive Red 76 (RR76) organic dyes pollutant present in textile wastewater. The C-TiO2 showed the highest photocatalytic efficiency. The degradation of RB19 and RR76 dyes were studied via applying of different experimental conditions such as pH, amount of catalyst, dye concentration, shaking speed, and irradiation time as well as the recover possibility of catalyst. Under optimum conditions, the photocatalytic degradation efficiency of the C-TiO2 sample for textile wastewater, containing RB 19 and RR 76 dyes, attained 100% after 1 h reaction time with catalyst dose 0.08 g and pH 1. The chemical oxygen demand (COD) values were investigated before treatment and after irradiation treatment. Marine aquatic organisms’ rotifer, artemia, and Vibrio parahaemolyticus were used to study biological effects and Toxicity of resultant degraded material form the irradiation treatment of RB 19 and RR 76 dyes in wastewater.
Mahmoud A. Mousa, Ahmed El Nemr, Esam A. Gomaa, Shady M. Eldafrawy, and Elsayed T. Helmy
Egypts Presidential Specialized Council for Education and Scientific Research