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Base hydrolysis of tris(3-(2-pyridyl)-5,6-bis(4-phenyl sulphonic acid)-1,2,4-triazine)iron(II) in aqueous, SDS and CTAB media: kinetic and mechanistic study
No full textThe kinetics and mechanism of base hydrolysis of tris(3-(2-pyridyl)-5,6-bis(4-phenyl sulphonic acid)-1,2,4-triazine)iron(II),
have been studied in aqueous, sodium dodecyl sulphate (SDS) and cetyltrimethyl ammonium bromide (CTAB) media at 25, 35 and 45 °C under pseudo-first-order conditions, i.e. ≫ . The reaction is first order each in and hydroxide ion. The rate increases with increasing ionic strength in aqueous and SDS media, whereas this parameter has little effect in CTAB. In SDS medium, the rate-determining step involves the reaction between and , whereas in CTAB medium, it involves reaction between a neutral ion pair, {·4CTA+} and ions. The specific rate constants and thermodynamic parameters (E a, ΔH #, ΔS # and ΔG #35°C ) have been evaluated in all three media. The near equal values of ΔG #35°C obtained in aqueous and SDS media suggest that these reactions occur essentially by the same mechanism. Slightly lower ΔG #35°C values in CTAB medium can be attributed to a higher concentration of reactants in the Stern layer. The reaction is inhibited in SDS medium but catalysed in CTAB. The former can be attributed to the anionic surfactant creating more repellent space between the reactants. Catalysis in CTAB medium is ascribed to electrophilic and hydrophilic interactions between hydroxide ion/substrate with the cationic Stern layer, resulting in increased local concentrations of both reactants
Turnitin Quick-guide for Students
No full textTurnitin is an online service that allows lecturers and students to check the level of plagiarism in a document to reduce cheating and enforce academic integrity.
It searches internet sources and it’s own repository to find content that is similar to what the student has submitted.
Similarities found are then highlighted in the submitted document with links to the internet sources they were found.
A report is then generated summarizing the overall percentage of plagiarism in the submitted document.
Students can then correct their work and resubmit if the level of plagiarism is higher than that acceptable by your supervisor/lecturer
MKU’S graduate enterprise academy: equipping students beyond academic frontiers
No full textThe public sector is not creating enough jobs to match the numbers of youths completing university education and entering the job market every year. In the past, the government was the biggest employer. But with the freeze on employment in the public sector, except for a few critical areas, young people are graduating into unemployment. Even the private sector is not creating jobs at the desired rate.” These are the words of Prof. Simon Gicharu, the founder and chairman of Mount Kenya University
23-year-old MP-elect shops for good ideas
No full textThe youthful MP-elect for Igembe South has promised to keep his ear to the ground to ensure that he makes the right decisions that impact on the lives of his people. In an exclusive interview with The Standard in Maua town, John Paul Mwirigi, 23, said his priority will be to improve the life of ordinary mwananchi by ensuring there are better health facilities, roads, education, and infrastructure and building more markets in the banana-rich constituency. But although he knows the direction he would like to steer the constituency, Mwirigi urged residents to ‘freely’ give him ideas on how to transform the area
MKU Team visits UNISA
No full textA team of seven members of staff from Mount Kenya University ( MKU) led by the deputy vice chancellor, academic and research affairs and comprising a board member, the registrar of academic affairs, the director of examinations, the deputy director of the management information systems (MIS), the technical coordinator of the digital varsity as well as the marketing coordinator visited the University of South Africa (UNISA) last month to benchmark on digital varsity. The team learnt that UNISA has set up a very highly efficient process. To attain this, the university has invested heavily in ICT infrastructure. It also promotes accountability, team work and synergy across various academic sections, besides having a well laid feedback mechanism. It is also worth noting that the university has a rich research culture
Mount Kenya University Newsletter, January 2017 Issue
No full textThe placement of the first batch of Government-sponsored students in private universities since independence marks a major milestone in Kenya’s higher education sector. Mount Kenya University (MKU) attracted the highest number of applications and admitted the bulk of the sponsored students in its September 2016 intake. MKU took in 1,126 (or more than 10 percent) of the 10,000 students sponsored by the Government.
In an interview, MKU Vice Chancellor, Prof Stanley W. Waudo, described this as a move in the right direction for the country
9th edition
No full textFood and Beverage Service covers the knowledge and skills necessary for those studying and/or working at a variety of levels in food and beverage service. The book also provides a framework on which to build further studies and to relate further acquired knowledge and experience.
An explanation of how information can be found in the book is given in the section How to use this book, p. viii. This section also contains a Master reference chart on pp. ix–xi, which summarises the tasks and duties for staff working in food and beverage service. The chart also identifies where to find information within the book
Dear student, there’s a lot more to life than just passing exams
No full textThe Kenya Certificate of Secondary Education examination results are finally out and you may be happy or sad, depending on how you performed.
Congratulations to those who passed and to those who “failed”, congratulations to you too! This is wh
Anticancer activities and safety evaluation of selected Kenyan plant extracts against breast cancer cell lines
No full textBreast cancer is a leading cause of deaths among women suffering from cancer in Kenya. The current
study was done to determine anticancer activities of medicinal plant extracts against breast cancer cell
lines (HCC 1395 and 4T1). Vero cells were used for evaluation of safety of extracts. Thiazoly blue
tetrazolium bromide (MTT) assay was used in this study. Reference drugs were 5 fluorouracil and
cyclophosphamide. Extract concentrations that inhibited growth of cell growth by half (IC50) were
estimated using GraphPad prism version 7 and 90 % of extracts showed anticancer activities. Methanol
extracts of Uvariodendron anisatum, Fagaropsis angolensis, Combretum tanaense, Hydnora abyssinica
and water extract of F. angolensis exhibited remarkable anticancer activities (IC50˂ 30 μg/ml). Methanol
extracts of F. angolensis and H. abyssinica demonstrated high selectivity index (SI ≥3). Evaluation for
safety, indicated that about 64% of the extracts under this study were non-toxic (CC50 ˃100 μg/ml).
Findings from plants in this study support folklore claims. Phytochemical analysis, bioassay guided
fractionation an