Abstract The lithofacies and foraminiferal assemblages of the Imo Formation exposed at Umuna-Umuawo, Ezeagu, Anambra Basin were evaluated for the purpose of environmental interpretation and age dating. Lithofacies were described based on lithology. The lithologic units of the succession are basically dark-grey to bluish-grey shales with presence of gastropod mineralized shells depicting a marine depositional environment. The shale is interbedded with patches of siltstone and clay beds. The me...
ABSTRACT Researchers suggest that the amount of sunlight that strikes the Earth's surface in an hour and a half is enough to handle the entire world's energy consumption for a full year. Solar power system is one of the best renewable energy technologies which is not only cost effective but environment friendly as well.This study aimed at designing and installing a quite low-cost inverter of 3.5KVA with high efficiency and quality output capabilities to power some appliances of a total load...
TABLE OF CONTENT An Indicator Species & Identification Description of Microcystis aeruginosa Ecological Characteristics, Evolutionary Strategies & Ecological Class What Makes Microcystis aeruginosa an Indicator of Disturbance Successional Status Agents that Promote Microcystis aeruginosa Usefulness offs an Indicator References References
Table of Content Introduction Objectives Study design Data collection Results Discussion Conclusion References Introduction Alien invasive species are introduced accidentally or intentionally outside of their natural geographic range & become problematic. Semimytilus algosus spreads from the point of introduction, rapidly colonising & establishing populations on the rocky shore, disrupting native perna perna species (Alexander et al. 2015) Semimytilus algosus is native ...
ABSTRACT The internet of things which is the current wave in the development of the internet has been around for some time. It is specifically about connecting objects (things) that would not ordinarily be considered worthy for internet connectivity. Things such as houses, cars, caps, ACs, and just think of it can be connected to the internet by embedding i...
TABLE OF CONTENTS Page title i Certification ii Dedication iii Acknowledgement iv Abstract v List of tables ...
Abstract With the ongoing advancement of technology and innovation, bionic technology is also rapidly evolving and becoming more lifelike in their form and function and indeed, changing lives across the world by removing the physical barriers to empower the disabled people. Presently, in most of the developing countries, many amputees are facing challenges to access bionic technologies due to its availability being extremely limited, yet the demand for bionic devices ...
Table of contents CHAPTER ONE4 INTRODUCTION4 1.1 Background of the Study4 1.2 Problem Statement6 1.3 Research Question7 1.4 Research Objective8 1.5 Key Definitions8 1.6 Organization of the Thesis9 1.7 Chapter Summary10 CHAPTER TWO11 LITERATURE REVIEW11 2.1 Unified Theory of Acceptance and Use of Technology (UTAUT)11 2.2 Technology Acceptance Model (TAM)12 2.3 Hypotheses Development12 2.3.1 Perceived Usefulness12 2.3.2 Perceived Ease of Use13 2.3.3 Perceived Trust13 2.3.4 Social Influence14 2...
This study presents the comparison of various properties of paperboard from various Argo wastes. The agro wastes under study in this project include sugarcane bagasse, coir fiber (coconut husk) and maize stalk. The properties differ as a result of the composition and structure of the biomass that is put into consideration that is the amount of cellulose, hemicellulose and lignin available in the agro waste biomass. Paper is basically made from cellulose fibers therefore the project aims to di...
Abstract. J. Eur. Ceram. Soc. 39 (2019) 1156–1163. (DOI: 10.1016/j.jeurceramsoc.2018.11.043). Nano-crystalline Sr0.5Ba0.5Nb2O6 was synthesized by a one-pot method using PEG400 and citric acid. Calcination of the (Sr,Ba,Nb)-gel at 600 °C leads to Sr0.5Ba0.5Nb2O6 with a crystallite size of 24(2) nm and a specific surface area of 38.5(10) m2 g-1. Sintering upto 1325 °C leads to ceramics with globular or irregular-shaped grains and average grain sizes between 1.3 and 2.4 μm, whereas higher ...
Abstract: J. Mater. Sci. 48 (2013) 6509–6518. (DOI: 10.1007/s10853-013-7447-x).The synthesis and characterization of nano-sized MgFe2O4 by a starch-gel method is described herein. A phase-pure nano-sized MgFe2O4 powder (1a) was obtained after calcining a (MgFe)-starch gel at 550 °C. The powder has a specific surface area of 60.6 m2/g and a crystallite size of 9 nm. TEM investigations reveal particles in the range of 7 to 15 nm. The activation energy of the crystallite growth process w...
Abstract: RSC Adv. 5 (2015) 71491 (Open Access, DOI: 10.1039/c5ra12312g).BaTiO3-MgFe2O4 composites (30 wt.% MgFe2O4) with a small addition of BaGeO3 as a sintering additive were synthesized by a one-pot Pechini-like sol-gel process. Nano-crystalline composite powders with a crystallite size of about 10 nm were obtained after reaction at 700 °C for 1 h. Magnetic investigations suggest that the nano-powder is in its superparamagnetic state at room temperature. The addition of BaGeO3 leads to a...
Abstract. J. Solid State Chem. 287 (2020) 121380. (DOI: 10.1016/j.jssc.2020.121380). Nanocrystalline Li0.5Fe2.5O4 was prepared by a starch-based soft-chemistry synthesis. Calcining of the (LiFe)-gel between 350 and 1000 °C results in Li0.5Fe2.5O4 powders with crystallite sizes from 13 to 141 nm and specific surface areas between 35 and 7.1 m2 g-1. XRD investigations reveal the formation of ordered Li0.5Fe2.5O4. Sintering between 1050 and 1250 °C leads to ceramics with relative densities of ...
Abstract. Solid State Ionics 249–250 (2013) 1–5. (DOI: 10.1016/j.ssi.2013.07.001). The optical and magnetic properties of nano-LaFeO3 powders prepared by a starch assisted soft-chemistry synthesis and corresponding ceramics have been investigated. Magnetic measurements on LaFeO3 powders with crystallite sizes of 37−166 nm showpronounced magnetization hysteresis loops. Measurements at 300 K reveal that the coercivity (Hc) of 19−32 kOe depends on the crystallite size, whereas the low re...
Abstract. Solid State Ionics 231 (2013) 43–48. (DOI: 10.1016/j.ssi.2012.10.017). The preparation of a nano-sized LaFeO3 powder by a soft-chemistry method using starch as complexing agent is described herein. Phase evolution and development of the specific surface area during the decomposition process of (LaFe)-gels were monitored up to1000 °C. A phase-pure nano-sized LaFeO3 powder with a high specific surface area of 25.7 m2/g and a crystallite size of 37 nm was obtained after calcining at...