Natural & Applied Sciences

Research Papers/Topics in Natural & Applied Sciences

Magnetic, Optical, Dielectric, and Sintering Properties of Nano-crystalline BaFe0.5Nb0.5O3 Synthesized by a Polymerization Method

Abstract A one-pot polymerization method using citric acid and glucose for the synthesis of nano-crystalline BaFe0.5Nb0.5O3 is described. Phase evolution and the development of the crystallite size during decomposition of the (Ba,Fe,Nb)-gel were examined up to 1100 °C. Calcination at 850 °C of the gel leads to a phase-pure nano-crystalline BaFe0.5Nb0.5O3 powder with a crystallite size of 28 nm. The shrinkage of compacted powders starts at 900 °C. Dense ceramic bodi...

A Barium Germanium 1,2-ethanediolato Complex as Precursor for Barium Metagermanate

Abstract: Thermochim. Acta 457 (2007) 55-63. (DOI: 10.1016/j.tca.2007.02.021).The thermal behaviour of [Ba(HOC2H4OH)2Ge(OC2H4O)3] (2) as a BaGeO3 precursor, and its phase evolution during thermal decomposition in different atmospheres are described herein. The precursor complex decomposes in air to a finely divided mixture of BaCO3 and GeO2, which subsequently reacts above 650 °C to orthorhombic BaGeO3, transforming above 800 °C to hexagonal BaGeO3. The shrinkage beha...

Synthesis and Characterization of a Nano-scaled Barium Cerate Perovskite Powder Using Starch as Polymerization Agent

Abstract. Solid State Ionics 203 (2011) 52–56. (DOI: 10.1016/j.ssi.2011.09.010).The preparation of nano-sized BaCeO3 powder using starch as a polymerization agent is described herein. Phase evolution during the decomposition process of a (BaCe)-gel was monitored by XRD. A phase-pure nano-sized BaCeO3 powder was obtained after calcining of the (BaCe)-gel at 920 °C. The resulting powder has a specific surface area of 15.4m2/g. TEM investigations reveal particles mainly in t...

Sintering of a Fine-grained BaCeO3 Powder Obtained from a Co-precipitation Method

Abstract.J. Mater. Sci. 45 (2010) 6521–6527. (DOI: 10.1007/s10853-010-4741-8). The formation of BaCeO3 by a co-precipitation method is described herein. The coprecipitation route leads to an orange (BaCe)-precursor powder (1). To improve the sintering behaviour, a small amount of Ge4+ was incorporated, leading to a (BaCe0.95/Ge0.05)-precursor (2). Both precursor powders results in fine-grained preceramic powders (1A, 2A) after calcination. The shrinkage and sintering behaviour...

COVID-19 and the Emergence of a New Way of Living

The COVID-19 pandemic is undoubtedly one of the biggest global crisis of this generation – a constantly evolving one, with new norms, regulations and updates to counter the disease. This article specifically talks on the introduction to COVID-19, its causes and effects and how we adapt to a new way of living. Keywords: Environment, Annual rate, Global crisis, Foreign investors, Epidemiology, Psychology.IntroductionThe outbreak of Coronavirus Disease (COVID-19) has been declared...

Effect of Oven Drying Temperatures in Preserving African Breadfruit (Trecuila Africana)

ABSTRACTThe study was designed to evaluate the effect of oven drying temperature in Preserving African Breadfruit (Trecuila africana). African breadfruit was sorted out, washed with clean water, parboiled for three mins to enable easy dehulling of the seed, dehulled using manual disc attraction mill, winowed and cleaned. The African breadfruit was subjected to different rates of drying temperature (50°c, 60°c and 70°c). Proximate, mineral, phytochemicals and sensory evaluation of th...

Determination of Vanillin and its Adulterants in Consumer Ice cream using High Pressure Liquid Chromatography

AbstractThe paper focuses on the determination of the concentration of vanillin in six types of ice creams purchased from supermarkets Aldi and Sainsbury’s. Similar areas of research haven’t calculated the extraction efficiencies of their proposed methods. In addition to there being no extensive attempts to determine if any adulterants within the selected vanilla ice creams are present. 

Investigating the Synthesis of Imidazolium Salts and their Coordination to a Nickel Metal Centre

This manuscript contains an insight into the mechanisms of inorganic carbene chemistry; synthesis of imidazolium salts from its precursors to using computational chemistry to calculate their quantum mechanical properties. As well as an attempt to deprotonate the iPr imidazolium salt and coordinating the carbene to a standard but labile Ni(0) precursor. The yield of iPr was optimised following the analysis of experimental data of iMes, iXy and Cy salts. The H...

Diagnosis of Pre- and Post-treatment of Echinococcus granulosus with Counter current Immune Electrophoresis and Bacterial Co-agglutination

AbstractObjectives: Echinococcosis is a cyclozoonotic disease caused by E. granulosus. The canine mainly the dog represents the definitive host and immunity plays an important role in the control of the disease. This study was aimed to detect Echinococcus granulosus B-antibody for Dot-ELISA and antigen for counter-current immune electrophoresis (CIEP) and bacterial co-agglutination assay (Co-A). Methods: Follow-up of 23 surgical and chemotherapy patients from different hospitals of Kh...

Design and Implementation of an Automated Navy Recruitment System

Web based recruitment portal is a web based application that monitors the recruitment process of any organization online.  It has the features that allow the user to apply for job online.  When application is sent through the web portal, based on the requirement of the said job description, the portal screens the candidate and determines whether or not the applicant is qualified.  If the applicant is not qualified, the portal rejects the application and returns a feedback to the us...

Design and Implementation of Fingerprint Based Automated Teller Machine (ATM) System

The advancement in banking efficiency has brought about the invention of the Automated Teller Machine (ATM) which make financial transaction easy and faster. Notwithstanding, the current trend of Cybercrime facilitate the need for an enhanced fingerprint application on ATM machine which will decrease the rate of financial frauds and theft. The mechanism is intended to enable assigned fingerprint authentication of customers with quick code and secret code. The study aims at enhancing the...

Design and Implementation of Fake Product Review Monitoring System

The existence of fake product can directly harm a company's growth as well as consumers. Various organizations have been using many initiatives and modern technology to prevent counterfeit goods. But the company that manufactures a real product have introduced many modern technologies such as barcode and QR code. Fake item producers can go to the extent of even building barcodes (existing system) for their products so that when scanned, the result will show the existence of the product....

Design and Implementation of Electronic File Management System for Nigeria National Law Drug Enforcement Agency (NDLEA)

In the operation of Nigeria National Drug Law Enforcement Agency (NDLEA) crime cases are documented on paper documents which has unavoidably increased the amount of paper documents in the office and which can be easily destroyed by water spillage and fire hazards. However, the electronic form of the documentation has the potentials of eliminating the above listed problems of the manual documentation. The aim of this study is to design an electronic file document management system for t...

Usefulness of Deep Web and Prospects for Web Hidden Content

Deep web content includes any content that its owners have blocked web search engines and individual accessing such as medical records, fee-based content, membership websites, and confidential corporate web pages. Most people access Web contents with surface search engines and most of the Web contents are not accessible through surface search engines such as google. A complete approach to conducting research on the Web incorporates using surface search engines and deep web databases. It...

Design and Implementation of Computerised Snooker Game

Computer games have become a common form of entertainment in the 21st century and fast advancement in computer technology and internet speed have helped entertainment software developers to create graphical games that keep a variety of players’ interest. The emergence of artificial intelligence systems has evolved computer gaming technology in new and profound ways. Artificial intelligence provides the illusion of intelligence in the behaviour of Non-Playable-Characters. The aim of t...


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