Biography:

Abdulrazaq Tukur has completed his undergraduate studies from Ahmadu Bello University Zaria Nigeria, where he obtained his BSc. In Chemistry in the year 2011, and Masters in Organic Chemistry in 2016, and a PhD candidate in the same Institution from 2016 to date. He has publications both Internationally and locally, his area of expertise is Organic Chemistry, covering Organic synthesis and Natural Products.

Abstract:

New classes of dicarboxylic acid analogues were synthesized to explore their potentials as new lead drug candidates. The syntheses involve nucleophillic addition of different substituted benzylamine, aniline, alkylamine and 4-hydroxyl-L-proline with Carbamoylbenzoic acid. The compounds were fully characterized using spectroscopic techniques. The results of the antimicrobial activity as indicated by the zone of inhibition showed that Z₁₀ is the most active against pseudomonas aureginosa (32 mm) and least active against candida stellatoidea (27 mm) and Vancomycin Resistant Enterococci (VRE) (27 mm). While Z₇ shows the least zone of inhibition (22 mm) against Methicilin Resistant Staph-aureus (MRSA). The MIC results showed that Z₁₀ inhibits the growth of tested microbes at 6.25 µg/mL, while Z₉ and Z₁₂ inhibits the growth of most microbes at 12.5 µg/mL, therefore showed the least MIC. The Minimum Bactericidal/Fungicidal Concentration (MBC/MFC) results revealed that Z₁₀ has the lowest bactericidal/fungicidal effect, on the test microbes at a concentration of 12.5 µg/mL, with the exception of candida stellatoidea and Vancomycin Resistant Enterococci (VRE) with MIC of 25 µg/ml. While compounds Z₉ and Z₁₂ were bactericidal/fungicidal concentration of 25-50 µg/mL. The results shows that the target compounds (Z_1-3, _4-12) possess potentials that can be explored in the search for antimicrobial agents.

Biography:

Dr. Abolfazl Ghaderian has completed his PhD with honor from Institute of Chemical Research of Catalonia in Spain. He has decided to pay off his debt to mother earth and try to manage PET waste bottles by converting to useful material. Moreover, the replacement of fossil fuels with a sustainable energy sources such as water and sun is his second goal. Hence, he has started two enviromental chemistry projects, one in PET recycling and another on polymers for fuel cell application. The results of his scientific works have published in high impact journals. 

Abstract:

With increasing Poly (ethylene terephthalate) (PET) consumption as packaging material, the effective utilization of PET waste has received broad attention for the preservation of resources and protection of the environment. Since PET waste does not create hazards to the environment, its volume and cost of landfilling are very high. Various methods have been proposed for recycling waste PET. We report here a straightforward, practical, and novel preparation method for the recycling of PET waste bottles to prepare RPUFs (rigid polyurethane foams) by using propylene glycol (PG) in different glycol/polymer molar ratios. The effects of the different molar ratios of glycol/PET on glycolyzed products have been investigated. GPC results show that a high portion of oligomers are monomer, dimmer and trimmer, and a lower portion of oligomers had a higher molecular weight. The viscosity of glycolyzed products decreases with an increase in the ratio of glycol/PET in glycolysis processes. Moreover, the PET glycolysis reaction in a sealed reactor led to a reduction of PET flakes dissolution time and increase in the degree of PET depolymerization.

The results show density, compressive strength, modulus, thermal stability and the thermal conductivity coefficient of foams are affected by the molar ratio of glycol/PET and blowing agent. As a consequence, it is possible to produce rigid polyurethane foams by using glycolysis products of waste PET with properties similar to that produced by the foams with originalpolyol

Biography:

David Ferdinand Uche has a Bachelor of Science in Industrial Chemistry and is a Junior formulation and development chemist in the personal care and cosmetics and homecare in addition. He's currently with Skin101 Centre, Abuja, Nigeria, a giant in dermatological and aesthetic medical and surgical services. He has been a participant in CAS - a division of American Chemical Society - User Research Survey Study since June 2020 till date. He receives invitations to feature as a panel member in international online events involving topic discussion in his professional interest. He was recently invited to write an article on "Formulation and Reformulation: Challenges and Opportunities" in Euro Cosmetics Magazine - an international magazine for fragrance and cosmetics. He helps individuals, associations, organizations and firms formulate, reformulate and improve brands.                                                                               

Abstract:

Statement of the Problem: The nature of ingredients aloe vera gel is contained in doesn't influence its antimicrobial efficacy like the pH of its surrounding.                                         

Purpose of Study: To make a comparative analysis of the influence of pH and the nature of ingredients an aloe vera gel is contained in, in influencing its antimicrobial efficacy of an aloe vera gel.                                                                                                                                    Methodology: Two solutions(2% and 4%) of an acidic bath gel, having pH 5.5 and containing aloe vera gel, were subjected to antibacterial screening using agar well diffusion method. The dilutions of Staphylococcus Aureus and Escherichia Coli as the test organisms were added to bored cylindrical wells containing solidified agar. The solutions were then added to the well. The prepared plates were incubated at 37°C for 24 to 48hours. Antimicrobial activity was recorded in millimeters of the clear zones surrounding the wells. A study by Prakash et all in 2012 showed that the diameters of the clear zones of inhibition of Staphylococcus Aureus and Escherichia Coli using pure aloe vera extract in 30% ethanol-water solution were 24mm for both organisms.

Findings: The 4% solution, after 48hours, gave diameters of the clear zones of inhibition of Staphylococcus Aureus and Escherichia Coli to be 33mm and 25mm respectively, which are higher diameters than the ones recorded in pure aloe vera extract in 30% ethanol-water solution.                                                  Conclusion And Significance: Within the limits of this study, it can be concluded that pH is a more important factor than nature of ingredients an aloe vera gel is contained in, in influencing the antimicrobial potency of an aloe vera gel.                                                      

Biography:

Fateh Eltaboni received the B.Sc. degree in Chemistry from University of Benghazi (Libya) in 2003 and M.Sc. degree in Physical Chemistry from the same university in 2006, then he received the PhD degree in Physical Chemistry from the University of Sheffield (UK) in 2013  he worked as a post-doc researcher in bacterial polymers (Kroto Research Institute (UK) until the end of 2013. He is now with the Laboratory for Polymeric Materials & Nanocomposites         
 

Abstract:

There are several benefits to commonly used synthetic plastics; however, their resistance to biodegradtion has a negative effect on the environment. Therefore, due to growing interest in sustainability and environmental concerns, the use of biodegradable polymeric films will become widespread. Over the past two decades researchers have made great efforts to grow naturally-based ingredients that improve starch texture and nutritional values. Besides its uses in other foods, Starch has other non-food applications, ranging from body care to medicinal applications. Because starch is a renewable and environmentally friendly material, it can serve as a good replacement for fossil-fuel components in many chemical applications, including plastics, detergents, and glues. This research aims at developing edible potato starch film by mixing potato starch (PSS) with sodium starch glycolate (SSG) and silica nanoparticles (SiO₂) substantially controls its swelling and mechanical behavior. Potato starch film was prepared using glycerol as a plasticizing agent in aqueous gelatinous solution containing different quantities of SSG with and without SiO₂. UV-vis spectroscopic technique was used to investigate the edibility of films in aqueus salt solution pH 7.4 at 25 ^oC. The rheological and mechanical properties of films have showed the different respenses of the films to SSG content and loading of SiO₂. It has been determined that SSG's cross-linking capability plays a critical role in starch's mechanical and rheological properties.

Biography:

Abstract:

About 95% of di-ethylhexylphthalate( DEHP) produced and used as a plasticizer in polyvinyl chloride (PVC) resins for fabricating flexible vinyl products. Di(2-ethylhexyl)phthalate is a well-characterized reproductive system toxicant; it is a member of the phthalate chemical family, plasticizers that have potential endocrine-disrupting effects. DEHP and its metabolites alter proper testicular development in fetal rat models. The experiment was designed to study toxic effects of Di-(2-ethylhexyl) phthalate (DEHP) on semen characteristics, testosterone levels, testicular lipid peroxidation and testicular antioxidants in male New-Zealand white rabbits for 12 weeks. Rabbits were orally administered the doses of DEHP every day for 12 weeks. Results obtained showed that DEHP significantly (P<0.05) decreased libido (by increasing the reaction time), ejaculate volume, sperm concentration, total sperm output, sperm motility (%), total motile sperm per ejaculate (TMS), packed sperm volume (PSV), total functional sperm fraction (TFSF), normal and live sperm and semen initial fructose. While, initial hydrogen ion concentration (pH), and dead and abnormal sperm were increased (P<0.05). Also, testosterone levels, body weight (BW), relative weights of testes (RWT) and epididymis (RWE) were decreased. Thiobarbituric acid-reactive substances and lactate dehydrogenase were increased, while glutathione S-transferase, transaminases and phosphatases were decreased in seminal plasma of rabbits treated with DEHP compared to control.

Biography:

Hebatullah is a PhD candidate at The American University In Cairo. She is also a research assistant and teaching assistant at the same university. She was a former research specialist in one of the pharmaceutical governmental companies where she developed several products. Her master degree was in food packaging and analysis.

Abstract:

Pharmaceuticals as emerging contaminants pose health risks to humans and all living organisms when disposed of in water streams. In the present work, we selected the ciprofloxacin HCl antibiotic as an example of contaminants of emerging concern which are commonly found in wastewater effluents. Removal of ciprofloxacin from aqueous solutions was investigated using porous polylactic acid (PLA) membranes impregnated in situ with single metal nanoparticles such as cobalt, nickel, copper or with a binary mixture thereof. Among the different employed membranes, cobalt-loaded ones exhibited the highest % removal of 80.7% followed by copper-loaded (70.9%) then nickel-loaded ones (68.7%) at pH 6.5 and initial ciprofloxacin concentration of 50 ppm. In addition, percent removal for cobalt-loaded membranes exceeded that of the unloaded ones by 1.3 times under the same employed conditions. Thus, cobalt-loaded membranes were further characterized using Fourier Transform Infrared (FTIR) Spectroscopy, Scanning Electron Microscopy (SEM), Dynamic Light Scattering (DLS) measurements and Thermogravimetric Analysis (TGA). FTIR measurements of the membranes pre- and post- adsorption indicated that PLA groups were not involved in the adsorption mechanism but rather interaction occurred onto the cobalt nanoparticles. DLS measurements showed that the zeta potential of the membranes is zero or slightly negative implying that the membranes are neutral under the employed pH. Being also neutral at this pH, ciprofloxacin HCl would not possibly interact with the nanoparticles via electrostatic interaction. The interaction, however, might involve physical adsorption followed by degradation.

Biography:

Abstract:

Biography:

Dr. Nami giala is working as Professor in Dept of Science Laboratory Tech., Federal Polytechnic Mubi, Adamawa State, Nigeria.

Abstract:

The quest for environmental protection have been growing during the past years. Efforts and research to reduce environmental pollution have been focused by the decrease of the pollutant effluents and/or treatment of pollutant effluents before their discharge from their sources. Traditional treatment methods for removing heavy metals from waste waters and food chain include chemical oxidation and reduction, chemical precipitation, membrane filtration, ion exchange and electrochemical processes. However, each of these methods has its own limitations and disadvantages which make each of them either economical or technically infeasible for heavy metal removal. Adsorption has been shown to be the most feasible method for the removal of heavy metals from diluted wastewater streams (Abu Al-Rub et al. 2002, 2003). This research is aimed at determining the heavy metal binding ability of the crude and insoluble dietary fibre of Spinous Amarantus(alayahon daji)(AA) Senna accedentalis (tasba)(TB), Phyllantus niruri (mace mai goyo)(MC),  Hibiscus sabdrariffa (yakuwan daji)(YD) and Leptadenia hastate (yadiya)(YE) which are commonly consume  in Adamawa state, Nigeria using AAS Method with a view to recommending them as biomaterials for the removal of heavy metals aqueous solution. All the crude samples showed significantly higher heavy metal ion (Cd2+, Cu2+ and Pb2+) binding ability than their respective insoluble dietary fiber (IDF), this is attributed to the chemical composition and structural properties of the crude samples and their IDF. The extraction process could increase the surface area of crude samples and thereby increasing their metal adsorption.

Biography:

Dr. Olga Kaczerewska completed her PhD (2017) from Faculty of Chemistry, Adam Mickiewicz University in Poznan (Poland). In 2018, Dr. Kaczerewska was awarded a Marie Curie Individual Fellowship (H2020-MSCA-IF-2017) and in September 2018 started a project (EcoGemCoat, 792945) entitled “Smart anticorrosion coatings based on nanocontainers loaded with novel, eco-friendly cationic gemini surfactants as efficient corrosion inhibitors for carbon steel in seawater”. The project is being run in CICECO-Aveiro Institue of Materials (University of Aveiro, Portugal). So far, Dr. Kaczerewska (h-index of 5) published 7 research papers and is a co-author of 2 book chapters.

Abstract:

Mesoporous silica nanocapsules are a well-known and leading nanocontainers’ system applied in several fields (corrosion protection, antifouling, drug delivery). However, it has been already reported that the monomeric cationic surfactant hexadecyltrimethylammonium bromide (CTAB), used as a template in the synthesis of these nanocapsules, should be replaced because of being a source of nanocapsules’ toxicity.

In this work we investigate the replacement of CTAB with dimeric surfactants, known as gemini surfactants. Works already available in the literature show that gemini surfactants tend to exhibit lower toxicity to fresh water and marine species than their conventional analogues. Therefore, this study can be envisaged as a safe-by-design approach to silica nanocapsules synthesis by replacing a commercial surfactant (CTAB) with a gemini surfactant (QSB2-12). Nanocapsules prapred using both surfactants were fully characterized by different techniques (BET, FTIR, DLS, TGA, SEM), while the short-term exposure effect was evaluated towards four marine species (the green microalgae Nannochloropsis gaditana and Tetraselmis chuii, the diatom Phaeodactylum tricornutum, and the microcrustacean Artemia salina).

This work has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 792945 (EcoGemCoat) and was developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020 & UIDP/50011/2020, financed by national funds through the Foundation for Science and Technology/MCTES.

Biography:

Dr. Sebastian Hernandaz completed her PhD (2017) from Faculty of Chemistry, University of Kentucky (USA). In 2018, Dr. Sebastian Completed his post doctoral research  and now currently working as a independent consultant in GESTORES EN SEGURIGAG Y SALUD EN EL TRABAJO(colombia)

Abstract:

The synthesis of environmentally friendly and sustainable multi-functional surfaces and materials is leading the research of innovative applications in energy, water and environmental remediation. The most important biological and physicochemical process occur at the surface or the interface between two or more materials. Hence, if a material’s surface can be functionalized, it could perform different tasks simultaneously such as catalysis, selective separations, sorption and adhesion, and oxidation/reduction processes.

The development of new-generation materials that extend the industrial applications of reaction-separation processes is being addressed in some applications like water treatment or fuel cells. The development of functionalized surfaces in highly porous materials can led to stimuli responsiveness such as ionization, electron and ion transfer, swelling, hydrophobicity/hydrophilicity or sorption. These new combination of techniques and materials prove to be effective in selective separations in various environmental conditions, enhancing reactivity, durability and permeation.

The main idea is how to increase the number of functional groups by unit of area on the material used in order to give and augment sensibility, reactivity, selectivity or sorptive characteristics and, at the same time not affecting or even improve the application performance. Polymers and biopolymers may display these different surface functionalities and due to their versatility, they can be applied in diverse research fields and simultaneously be sustainable technologies.