Palladium-loaded core-shell nanospindle as potential alternative electrocatalyst for oxygen reduction reaction

Yusuf, Mohammad,Nallal, Muthuchamy,Nam, Ki Min,Song, Sehwan,Park, Sungkyun,Park, Kang Hyun Elsevier 2019 ELECTROCHIMICA ACTA Vol.325 No.-

<P><B>Abstract</B></P> <P>A well-dispersed palladium nanoparticle (Pd NP)-loaded α-Fe<SUB>2</SUB>O<SUB>3</SUB>@SiO<SUB>2</SUB> core-shell nanospindle (PdFS-CSNS) composite is employed as a potential electrocatalyst for the oxygen reduction reaction (ORR). PdFS-CSNS comprised a uniform core-shell (α-Fe<SUB>2</SUB>O<SUB>3</SUB>@SiO<SUB>2</SUB>) nanospindle structure with a core diameter of 80 nm and shell thickness of 15 nm; the nano-sized Pd NPs (2 nm) were loaded by the <I>in situ</I> reduction method. The structural properties and elemental composition of the as-prepared PdFS-CSNS catalyst is characterized by scanning electron microscopy, transmission electron microscopy, X-ray powder diffraction, Fourier-transform infrared spectroscopy, N<SUB>2</SUB> sorption isotherms, and X-ray photoelectron spectroscopy. Compared to commercial Pt<SUB>20%</SUB>@C, the PdFS-CSNS electrocatalyst demonstrated effective ORR electrocatalytic activity <I>via</I> the 4-electron pathway, high stability, and durability, as well as great methanol tolerance. Such intriguing electrocatalytic performance is ascribed to the highly active Pd NP component and effective production of the silica layer in the novel PdFS-CSNS electrocatalyst. The remarkable electrocatalytic activity of PdFS-CSNS will promote further interest in the development of core-shell nanomaterials for other energy and environmental applications.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Well-dispersed Pd Nps on α-Fe<SUB>2</SUB>O<SUB>3</SUB>@SiO<SUB>2</SUB> nanospindle (PdFS-CSNS) was fabricated. </LI> <LI> PdFS-CSNS showed high electrocatalytic activity for oxygen reduction reaction. </LI> <LI> PdFS-CSNS was obtained high stability, durability, and great methanol tolerance. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Effect of Vinyl Acetate Effluent in Reducing Heat of Hydration of Concrete

Mohammad Ismail,Ainul Haezah Noruzman,Muhammad Aamer Rafique Bhutta,Taliat Ola Yusuf,Ibrahim Hassan Ogiri 대한토목학회 2016 KSCE Journal of Civil Engineering Vol.20 No.1

Waste generation especially in surface coating industries is a potential pollutant to the environment globally. Waste disposal in the form of recycling or reused has gained some recognition as a raw material in many kind of interested fields. This study is therefore, aimed at utilizing Vinyl acetate effluent generated from manufacturing process of paint as polymer modifier in concrete. The research highlights the influence of Vinyl acetate effluent on setting time and control of heat of hydration in concrete. Three specimens containing 0%, 2.5% and 5% of Vinyl acetate effluent by weight of cement were prepared in cubic moulds. The temperature rises due to heat of hydration in all mixes were recorded. Finding shows that incorporating Vinyl acetate effluent considerably delayed the setting time in cement paste and reduced the total temperature rise in polymer modified concrete. Therefore, addition of Vinyl acetate effluent polymer in concrete may improve the properties of concrete to some extent particularly in mass concrete production.

Seasonal Changes of Water Properties and Current in the Nothernmost Gulf of Aqaba, Red Sea

Riyad Manasrah,Mohammad Zibdah,Firas Al-Ougaily,Najim Yusuf,Tariq Al-Najjar 한국해양과학기술원 2007 Ocean science journal Vol.42 No.2

Seasonal changes of tide signal(s), temperature, salinity and current were studied during the years 2004-2005 in the northernmost Gulf of Aqaba, which is under developmental activities, to obtain scientific bases for best management and sustainability. Spectrum analysis revealed permanent signals of tide measurements during all seasons, which represented semidiurnal and diurnal barotropic tides. The other signal periods of 8.13, 6.10-6.32, 4.16 and 1.02-1.05 h were not detected in all seasons, which were related to shallow water compound and overtides of principle solar and lunar constituent and to seiches generated in the Red Sea and the Gulf of Aqaba. Spatial and temporal distribution of temperature, salinity and density showed significant differences between months in the coastal and offshore region and no significant differences among the coastal sites, between the surface and bottom waters and between coastal and offshore waters. Therefore, the temporal and spatial variation of water properties in the northernmost Gulf of Aqaba behave similarly compared to other parts. The coastal current below 12 m depth was weak (3-6 cms-1) and fluctuated from east-northeastward to west-southwestward (parallel to the shoreline), which may be related to the effect of bottom topography and/or current density due to differential cooling between eastern and western parts in the study area, and wind-induced upwelling and downwelling in the eastern and western side, respectively. The prevailing northerly winds and stratification conditions during summer were the main causes of the southward current at 6 and 12 m depths with average speed of 28 and 12 cms-1, respectively.

ORGANOCHLORINE INSECTICIDE RESIDUES IN SEDIMENTS FROM THE COAST OF CHITTAGONG, BANGLADESH

Ahmed Khan, Yusuf Sharif,Alauddin Talukder, Abul Bashar Mohammad,Begum, Jahanara 영남대학교 해양과학연구소 1997 Marine Nature Vol.5 No.1

ABSTRACT :A total of 5 samples of marine sediments were analyzed for residues of organochlorine insecticide from the coast of Chittagong, Bangladesh. The analytical method consisted of 3 phases 1) extraction, 2) clean-up and 3) analysis through Gas Chromatography (GC) with Electron Capture Detector (ECD). The concentration ranges were as follows 0.18-1.33 ng.g-¹ for aldrin, 0.2-1.84 ng.g-¹ for dieldrin, 0.30-1.31 ng.g-¹ for endrin, 0.11-0.26 ng.g-¹ for lindane, 0.56-3.36 ng.g-¹ for heptachlor, 0.2-1.51 ng.g-¹ for P, P' DDE, 0.18-2.91 ng.g-¹ for P, P' DDD, 0.11-3.12 ng.g-¹ for P, P' DDT. These results reveal that the sediments in the coast of Chittagong are slightly contaminated with some of these organochlorine insecticides.

TRACE METALS IN THE SEDIMENTS FROM THE COAST OF CHITTAGONG, BANGLADESH

ALAUDDIN TALUKDER, Abul Bashar Mohammad,AHMED KHAN, Yusuf Sharif,BANU, Suraiya Akter,TARAFDER, Solaiman Ali,MONJURUL ALAM, S. M. 영남대학교 해양과학연구소 1998 Marine Nature Vol.6 No.1

The different aspects of attractive toxic baits containing fipronil for control of the German cockroach (Blattella germanica)

Mehdi Khoobdel,Hossein Dehghan,Mohammad Ali Oshaghi,Esmail Amiri Ghannat Saman,Abouzar Asadi,Mustapha Ahmed Yusuf 환경독성보건학회 2022 환경독성보건학회지 Vol.37 No.4

The use of Attractive Toxic Baits (ATBs) is considered to be a low-risk practical method for controlling cockroaches. This study evaluates the attractiveness of a lab-made, fipronil-containing bait, and its effect on the food consumption and mortality of the German cockroach Blattella germanica, under field and laboratory conditions. Different developmental stages of the cockroach were used to determine their preferred carbohydrate/protein rich foods and examine the effectiveness of lab-made baits. The analysis of variance (ANOVA) with Tukey’s Test was determined using SAS 9.1 and GraphPad Prism software programs. The significance level was considered at p<0.05. The most-consumed foods were carbohydrate-rich foods (biscuit and banana powder) and food consumption rate was highest in non-gravid females. The most attractive bait ingredients were 20% roasted peanut butter, 50% biscuit and 30% banana powder. The highest lethality was recorded from the baits containing 0.02% fipronil under laboratory conditions, while infested houses baited with the lab-made bait showed 76.5% and 100% decline, respectively, in cockroach numbers in the first- and fourth-week post-baiting. In conclusion, palatable foods with a pleasant odour, like biscuit powder, banana powder and peanut butter were the most effective ingredients for the ATBs. The ATBs impregnated with 0.02% fipronil provide a promising approach for control of the German cockroach. However, there is a need to evaluate the potentials of the lab-made baits, under laboratory and field conditions, in the control of other health-important cockroaches.

Seasonal Changes of Water Properties and Current in the Northernmost Gulf of Aqaba, Red Sea

Manasrah, Riyad,Zibdah, Mohammad,Al-Ougaily, Firas,Yusuf, Najim,Al-Najjar, Tariq The Korean Society of Oceanography 2007 Ocean science journal Vol.42 No.2

Seasonal changes of tide signal(s), temperature, salinity and current were studied during the years 2004-2005 in the northernmost Gulf of Aqaba, which is under developmental activities, to obtain scientific bases for best management and sustainability. Spectrum analysis revealed permanent signals of tide measurements during all seasons, which represented semidiurnal and diurnal barotropic tides. The other signal periods of 8.13, 6.10-6.32, 4.16 and 1.02-1.05 h were not detected in all seasons, which were related to shallow water compound and overtides of principle solar and lunar constituent and to seiches generated in the Red Sea and the Gulf of Aqaba. Spatial and temporal distribution of temperature, salinity and density showed significant differences between months in the coastal and offshore region and no significant differences among the coastal sites, between the surface and bottom waters and between coastal and offshore waters. Therefore, the temporal and spatial variation of water properties in the northernmost Gulf of Aqaba behave similarly compared to other parts. The coastal current below 12 m depth was weak $(3-6\;cms^{-1})$ and fluctuated from east-northeastward to west-southwestward (parallel to the shoreline), which may be related to the effect of bottom topography and/or current density due to differential cooling between eastern and western parts in the study area, and wind-induced upwelling and downwelling in the eastern and western side, respectively. The prevailing northerly winds and stratification conditions during summer were the main causes of the southward current at 6 and 12 m depths with average speed of 28 and $12cms^{-1}$ respectively.

Exploring tempoyak, fermented durian paste, a traditional Indonesian indigenous fermented food: typical of Malay tribe

Anggadhania Lutfi,Setiarto R. Haryo Bimo,Yusuf Dandy,Anshory Lutfi,Royyani Mohammad Fathi 한국식품연구원 2023 Journal of Ethnic Foods Vol.10 No.42

Tempoyak is a traditional Indonesian fermented durian paste that is popular among the Malay ethnic community. While tempoyak is a distinctive, culturally significant culinary item in multifarious Indonesian cuisine, it remains understudied compared to other fermented foods like kimchi. Further research is called for to understand tempoyak’s microbial structure, dynamics, and potential health advantages that include immunostimulants, antihypercholesterolemia, probiotic action, preservatives, and antibacterial. Researchers can also reveal significant information on the history, ethnicity, production, microbiological challenges, nutritional and functional qualities, and future possibilities of indigenous food, including tempoyak. This research aimed to explore and investigate tempoyak as an indigenous fermented food by integrating a systematic literary research and data from earlier investigations. Tempoyak is closely associated with Malay identity, regardless of the place they dwell. As an essential part of everyday life in Malay community in Indonesia, tempoyak is commonly served at traditional ceremonies, wedding festivities, or large-scale events. This cultural importance makes Indonesian tempoyak distinct from its Malaysian counterpart. Tempoyak is made by crushing durian flesh, adding salt into it, and letting the homogeneous mixture sit at room temperature in a covered container for 4–7 days. The microfloras present in tempoyak are varied but primarily Lactobacillus sp., notably Lactobacillus plantarum . Proximate analysis is a viable method to assess the nutritional composition of tempoyak. Variations in nutritional content may occur due to differences in durian types, salt composition, sterilization time, temperature, and fermentation duration. Potential avenues for further studies include the role of tempoyak in fostering sustainable food systems, other health advantages of ingesting tempoyak, and the creation of novel tempoyak-based products. These study directions will further enhance the discipline and contribute to the preservation and promotion of Malay culinary heritage.

Carbon dynamics in agricultural greenhouse gas emissions and removals: a comprehensive review

Kamyab Hesam,SaberiKamarposhti Morteza,Hashim Haslenda,Yusuf Mohammad 한국탄소학회 2024 Carbon Letters Vol.34 No.1

Agriculture is a pivotal player in the climate change narrative, contributing to greenhouse gas (GHG) emissions while offering potential mitigation solutions. This study delved into agriculture’s climate impact. It comprehensively analysed emissions from diverse agricultural sources, carbon sequestration possibilities, and the repercussions of agricultural emissions on climate and ecosystems. The study began by contextualising the historical and societal importance of agricultural GHG emissions within the broader climate change discourse. It then discussed into GHG emitted from agricultural activities, examining carbon dioxide, methane, and nitrous oxide emissions individually, including their sources and mitigation strategies. This research extended beyond emissions, scrutinising their effects on climate change and potential feedback loops in agricultural systems. It underscored the importance of considering both the positive and negative implications of emissions reduction policies in agriculture. In addition, the review explored various avenues for mitigating agricultural emissions and categorised them as sustainable agricultural practices, improved livestock management, and precision agriculture. Within each category, different subsections explain innovative methods and technologies that promise emissions reduction while enhancing agricultural sustainability. Furthermore, the study addressed carbon sequestration and removal in agriculture, focussing on soil carbon sequestration, afforestation, and reforestation. It highlighted agriculture’s potential not only to reduce emissions, but also to serve as a carbon reservoir, lowering overall GHG impact. The research also scrutinised the multifaceted nature of agriculture, examining the obstacles hindering mitigation strategies, including socioeconomic constraints and regulatory hurdles. This study emphasises the need for equitable and accessible solutions, especially for smallholder farmers. It envisioned the future of agricultural emissions reduction, emphasising the advancements in measurement, climate-smart agricultural technologies, and cross-sectoral collaboration. It highlighted agriculture’s role in achieving sustainability and resilience amid a warming world, advocating collective efforts and innovative approaches. In summary, this comprehensive analysis recognised agriculture’s capacity to mitigate emissions while safeguarding food security, biodiversity, and sustainable development. It presents a compelling vision of agriculture as a driver of a sustainable and resilient future.