726 research outputs found
Co-existing pseudo-planar and saddle conformers of tetramethyl tetraaza[14]annulene platinum complexes: X-ray crystallographic studies on [PtII(tmtaa)] and trans-[PtIVCl(2)(tmtaa)]
No full textOrange platelets of [Pt(tmtaa)], where H₂tmtaa = 6,8,15,17-tetramethyl-5,6,9,14,15,18-hexahydrodibenzo[b,i ][l,4,8,11]tetraazacyclotetradecine, show the expected ‘pseudo-planar’ centrosymmetric macrocyclic conformation but red needles of another [Pt(tmtaa)] modification and purple trans-[PtCl2(tmtaa)] both show saddle-form co-ordination with the metal ion only 0.046(1) Å (Pt²⁺) or 0.024(5) Å (Pt⁴⁺) above the N4 plane; X-ray powder diffraction reveals similar dimorphism for [Pd(tmtaa)] but not for [Ni(tmtaa)].Rowena L. Paul, Stephen F. Gheller, Graham A. Heath, David C. R. Hockless, Louis M. Rendina and Meta Stern
Reducibility and irreducibility of Stern -polynomials
No full textsummary:The classical Stern sequence was extended by K.B. Stolarsky and the first author to the Stern polynomials defined by , , , and ; these polynomials are Newman polynomials, i.e., they have only 0 and 1 as coefficients. In this paper we prove numerous reducibility and irreducibility properties of these polynomials, and we show that cyclotomic polynomials play an important role as factors. We also prove several related results, such as the fact that can only have simple zeros, and we state a few conjectures
Characterisation of two members of a macroschizont gene family, Tashat1 and Tashat3, from Theileria annulata
No full textEThOS - Electronic Theses Online ServiceGBUnited Kingdo
Characterisation of two members of a macroschizont gene family, Tashat1 and Tashat2, from Theileria annulata
No full textTheileria annulata is a protozoan parasite of cattle, that causes the disease tropical theileriosis throughout sub-tropical regions of the Old World. Theileria parasites have the ability to immortalise the host leukocyte they infect causing clonal expansion and dissemination of infected leukocytes throughout the host. This property has allowed the development of an in vitro system for the culture of bovine cells infected by the macroschizont stage of the parasite. In addition, differentiation of the parasite towards the next life cycle stage, the merozoite, can be induced in culture. The signals that cause the macroschizont to differentiate into merozoites are not fully understood, although it is known that this event is associated with a major elevation in merozoite gene expression (Shiels et al., 1994). Recently a small family of parasite genes that are negatively regulated early during differentiation to the merozoite were identified. One member, known as TashAT2 contained predicted AT hook DNA binding motifs and was shown to be localised to the host cell nucleus. It has been postulated that the TashAT2 polypeptide may play a role in the regulation of macroschizont or modulation of host cell gene expression (Swan et al., 1999). The focus of this project was to characterise TashAT1, a second member of the TashAT gene family. To this end, the TashAT1 gene was sub-cloned and sequenced and mapped to a region of the genome containing TashAT2 and a third Task AT gene, TashAT3. The 1.4kb open reading frame of TashAT1 was virtually identical to the five prime end of TashAT3, indicating that TashAT1 or TashAT3 (TashAT1/3) were derived from a recent duplication event. The predicted amino acid sequence of TashAT1/3 contained four AT hook motifs, a nuclear localisation signal and a signal sequence. Northern blot analysis revealed that TashAT1, TashAT2 and TashAT3 mRNA were down regulated early, during differentiation to the merozoite in vitro. However, no down regulation was observed for any of the TashAT transcripts in a cell line that was severely attenuated with respect to parasite differentiation. Sequence analysis of the upstream regions of TashAT1/3 identified a motif element (TashUM) located 43bp upstream of the putative transcription start site of TashAT1/3 that was highly related to a sequence upstream of TashAT1 and another, unrelated macroschizont gene, Tash1. Preliminary electromobility band shift analysis of TashUM revealed that it bound to a factor found in host and parasite enriched nuclear extract, which appeared to decrease in abundance as the parasite differentiated towards merogony. Antisera generated against a region of TashAT1 failed to recognise a TashAT1 polypeptide by Western blot analysis. However, a 180kDa polypeptide that was down regulated with respect to merogony and co-localised to the host nucleus was specifically recognised. The detected polypeptide was identified as TashAT3 on the basis of size, sequence identity and predicted expression profile. Immunofluorescence analysis showed that the anti-TashAT1 antisera reacted against both the host nucleus and parasite. This reactivity was lost as the parasite differentiated to the merozoite. The host reactivity was probably due to recognition of TashAT3, while it could not be concluded that the parasite reactivity was directed against TashAT1. Taken together, the results indicated that TashAT3 and possibly TashAT1 are additional candidates for parasite encoded factors that are translocated to the host nucleus, bind to DNA and alter host cell gene expression. This modulation of gene expression could directly or indirectly alter the phenotype of the host cell and be involved in parasite dependent regulation of leukocyte cell division
Theory of Optimal Taxation and Current Tax Policy in Pakistan’s Agriculture
No full textpublic finance into the mould of classical welfare economics by emphasising minimisation of dead weight losses resulting from the imposition of a tax or faulty tax structure. As such, these modern theories have much in common with the traditional approach in terms of efficiency and equity. In spite of this, however, the differences remain. For example, the former theories adhere strictly to the norms of classical welfare economics which treats individual consumers as utility maximisers where improvements in welfare involve change that makes one individual better-off without making someone else worse-off [Stern (1987)]. In contrast to the emphasis of traditional theories on lump-sum taxes, the optimum tax literature is concerned with the implication of using non-lump-sum taxes which have a wider range and therefore more useful to the policy-maker. The recent work on normative tax theory looks at the impact of taxation on individual decisions and the trade off between raising revenues or redistributing tax burdens and the efficiency losses [Atkinson (1987)]. Finally, the optimal tax literature may be more pragmatic in its approach than traditional works as it realistically deals with government objectives and constraints and combines them into models that are sufficiently rich to allow for differences between people regarding income and expenditure patterns.
A Tribute to the Memory of Abraham Lincoln: Albion Lodge no. 26, F. & A.M. February 12, 1906.
No full textTitle vignette (silhouette of Lincoln). Portraits (silhouettes). Laid in: TLS from the author to William H. Scott, Esq., June 2, 1908. The author\u27s name does not appear on the title page or in the text.https://scholarsjunction.msstate.edu/fvw-pamphlets/1279/thumbnail.jp
Legal regulation of prices in Tanzania : an examination of the Regulation of Prices Act 1973 as a tool of social change and development
No full textDrawing mainly from the Tazanian experience this study
attempts to review the principal issues in the legal regulation of
prices, by identifying both the general and specific importance
of law in this respect. The position I shall present is that
legal control is both necessary and desirable for the welfare
and social development of the people. The key issue is whether
the market-place will perform its function satisfactory: Will
it produce socially desirable results? If it will not, why will
it not? And will legal regulation help to do the job a little
better?
In an attempt to answer some of these questions,
first of all, outline the basic issues raised by the study in
the first Chapter. Then I examine the general case for price
controls - the theory about the controls, the motives and reasons
for their imposition and the manner in which they are effected
in different economic systems. This is done in Chapter Two. Relying
most on the available literature on the regulatory process, this
Chapter also looks at the relationship between law and economic
regulation and concludes that the effectiveness of law depends
on the existence of a conducive socio-economic environment. In
Chapter Three I describe the past record of price control laws
in Tanzania. I conclude that despite the failure in the past,
the controls still constitute an important policy instrument
in the transition to socialism. In Chapters Four and Five I describe
the manner in which the current regulations are implemented and
the problems encountered. I conclude that the operational performance
of the controls is constrained by internal and external influences on the economic and political life of the country. In the concluding
Chapter I assess the impact of the controls: Do the controls
work? Do people buy goods at the controlled prices? Why today
the controls are almost popularly accepted as worthwhile? I conclude
that while there may be no measurable economic gains derived
by consumers, the controls have a stabilising effect on the social
and political front. In the final section I argue that the
future success of the legislation depends on creating a correspondence
between the economic structures and the control system. What
makes the controls ineffective is not so much defects in the
law but the contradictions between the orientation of and functioning
of the economic system and the ideological commitment
Personality of Main Character in Jobs Film Directed by Joshua Michael Stern
No full textThe purpose of this analysis is to know the personality of a person through a film. the author will discuss about the personality and nature of the main character in the film Jobs directed by Joshua Michael Stern. this paper contains how Steve personality in this movie. What are his personality types and moral values that can be taken and the author uses two relevant theories to analyze this film. The method of analysis is qualitative descriptive method. The data were collected through repeated witnessing and the theory for analysis here was obtained by books from library research and internet media in the form of electronic books. the results of f analysis show that (1) there are five personality data shown in the film (2) are seven data of personality type based on Goldberg's theory of Openness, Conscientiousness, Agreeableness, Extroversion and Neuroticism (3) moral values can be taken from film, that people can think of it as a lesson. The study of the analysis is useful for understanding the basic personality of each person and how good personality can affect a person's life in the field of work
Coaching as an option for the elementary school principal: an action research study
No full textThis action research project is an in-depth study of the work of a coach and her client -- an elementary school principal -- during a two-month coaching process. The project and the process emerged from a desire to learn about the most fitting actions of a coach in order to provide a productive coaching experience for future clients. A review of the literature in leadership in general and school leadership in particular is followed by a review of the literature in the field of coaching. This review reveals a lack of widespread research and practice in the field of coaching school leaders. While coaching has recently become an acceptable strategy to support leaders in the business world, school leaders who experience similar demands as CEO's and heads of large organizations, have not been supported in the same ways as their business community counterparts. The study also describes the methodology of action research. Through goal setting, reflections of the client, the author, and the author's outside coach, the author presents her discoveries, summary, analysis, and the need for coaching school leaders as a strategy for support and professional development
When does rent-seeking augment the benefits of price and trade reform on rationed commodities? : estimates for automobiles and color televisions in Poland
No full textTo assess the impact of price and trade reform on the Polish market for autos and color televisions, the author has developed a differentiated product model in which consumers maximize utility and firms maximize profits subject to rationing constraints and price controls. This paper focuses on that model. First it discusses the institutional details of the auto and color TV markets in Poland. It then lays out the stylized facts that are incorporated in the model, and discusses the methods of allocating autos and color TVs in the context of the rent-seeking and rent dissipation literature. The final section summarizes the results which find that, all things being equal, the elimination of price controls for both autos and televisions had the effect of decreasing imports, as more domestic autos were produced and sold. The implication is that -- contrary to the Polish government's intention -- price controls were a trade distortion that increased imports: that is, they implicitly subsidized imports. The author also shows that import liberalization produces greater benefits when there are domestic price controls with rent dissipation, because import liberalization reduces the rent. The appendices include a description of the model, a discussion of the data sources, and a review of the literature on rent-seeking activities as it relates to rent dissipation under price controls.Economic Theory&Research,Markets and Market Access,Access to Markets,Environmental Economics&Policies,Fiscal&Monetary Policy
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