Browsing by Publisher "UNIV SINDH, NATL CENTRE EXCELLENCE ANALYTICAL CHEMISTRY"
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Item An Overview of Analytical Methods for Bisphenol A(UNIV SINDH, NATL CENTRE EXCELLENCE ANALYTICAL CHEMISTRY) Harmanci, NY; Yemis, FOur food preparation and eating habits have gradually changed due to the pace of business life. Which have paved the way for the rapid development of ready-made food and plastic production industries. Various packets used for storing and selling ready-made foods and disposable plastic products contain Bisphenol A (BPA) which is very dangerous for health. This substance which can be transferred to the food not only acts like a hormone in the human body but also causes various diseases such as cancer, diabetes and obesity. The sensitive determination of this substance has gained importance in foods, human body fluids and tissues. For this purpose, researchers have developed various chromatographic, electrochemical and spectroscopic methods for BPA determination. In this review, the purpose of use, usage areas, exposure routes of BPA and its harms, methods developed to determine substance in question and pros and cons of various methods are discussed.Item Classification, Uses and Environmental Implications of Disinfectants(UNIV SINDH, NATL CENTRE EXCELLENCE ANALYTICAL CHEMISTRY) Yemis, F; Harmanci, NYDisinfectants are not only cleaning reagents such as soap or detergents but are hygienic materials prepared with the composition of various chemicals. Many classification routes are possible, but they are placed in two main groups, such as organic and inorganic disinfectants. The classification prevails for high level disinfectants and depends on chemical structure. In high-level disinfectants aldehydes, hydrogen peroxide, and chloride type chemicals are used. In contrast, alcohols, phenols, ammonium salts, and iodine solutions are recommended for low disinfectant applications. Soap, iodide, and alcohol solutions are the best antiseptic agents for hand and skin. Iodine-based solutions are good primary tissue and skin disinfectants. The alcohol solutions have a good inhibitory effect on many microorganisms, micro bacteria, fungi, and various viruses. These solution types are not hazardous to use as both antiseptic and surface disinfectants compared to many other chemicals.Item Nitrite in Nature: Determination with Polymeric Materials(UNIV SINDH, NATL CENTRE EXCELLENCE ANALYTICAL CHEMISTRY) Yenil, N; Yemis, FNitrogen compounds being important for the vital activities of living things are produced by the nitrification process and occurred spontaneously in the nitrogen cycle. Human vital activities are also responsible for the extra nitrogen released into the atmosphere. So, both human and environmental healths are negatively affected by the increasing nitrate and nitrate amounts in water and soil. For this reason, it is aimed to ensure regular control of nitrates and nitrites at certain levels in order to protect the universe and all living things. Their precise and selective determination by various methods is very important. Their determinations can usually be made by using electrochemical, spectrophotometric, chromatographic and titrimetric methods. Nowadays instead of these techniques, sensors are preferred in determining nitrate and nitrite due to their easy, fast, selective and sensitive application properties. Furthermore, polymeric materials have shown great promise for different sensing applications such as gas, humidity, explosive and water pollutants. Sensors, which are developed by polymerization, have very high quality for the determination of nitrite. The highly sensitive results of optical and electrochemical sensors attract the attention of researchers. In this review, different detection methods for nitrite ions and various studies on the preparation of polymeric sensors that can selectively capture the nitrite ions in complex matrices are examined.Item Carbon Based Electrode Materials and their Architectures for Capacitive Deionization(UNIV SINDH, NATL CENTRE EXCELLENCE ANALYTICAL CHEMISTRY) Samejo, B; Gul, S; Samejo, S; Abro, NQ; Yenil, N; Memon, NThe effective desalination and purification devices for seawater/ brackish water treatment are crucial in sustainable progress. Techniques that render high salt removal efficiency and water purification ability at low applied potentials play a central role in sustainable water supplies. One of them is capacitive deionization (CDI) which has drawn significant consideration as a promising deionization technology since the last decade. Desalination efficiency profoundly depends on tie utilized electrode material. The most widely used CDI electrodes are carbons due to their cost effectiveness and good stability. However, to acquire high electrosorption capacity, extensive researches are reported with modified carbon materials. CDI cell architectures are equally important for practical high salt removal performance. This review focuses on carbon materials in CDI along with other emerging trends in diverse carbon types, e.g., carbon nanotubes and their composites. Various architectures reported in the literature to improve desalination efficiency are also included here.Item The Panacea Plants for Environment and Humanity: Caper and Ritha(UNIV SINDH, NATL CENTRE EXCELLENCE ANALYTICAL CHEMISTRY) Yemis, F; Yenil, NCaper and Ritha are plants which have very important effects on both living beings and natural habitat. They are used in many areas like medicine, pharmacy, cosmetics and agriculture because of their positive features. Caper is compatible with the Mediterranean ecosystem and resistant to drought and high-salinity. When compared to the other most plants, it can remain green for a long time without water even in the summer season. Due to this magnificent property, this plant is effectively used for environmental protection. It has been reported that Caper contains biologically active compounds such as glucosinolates, alkoloids, phenolics, flavonoid, tocopherol and minerals such as sodium, potassium, phosphorus, calcium, magnesium, zinc and iron. Ritha grows in Asia's tropical and sub-tropical regions. It contributes to the environment like Caper because, it has ability to capture the chemical pollution from the soil. So, it helps to improve the quality and efficiency of the land by holding heavy metals like mercury, iron and zinc in the leaves and grabbing lead and cadmium in its fruits. Moreover, it biologically decomposes injurious organic molecules such as hexachlorobenzene and naphthalene. Furthermore, the nectar of Ritha can kill the flies and larvae of Southern cattle mite's species called Boophilus microplus.