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A STUDY ON HOMOTOPY THEORY
Get PDFwearepresentedwithtwospaceXandYtheproblemofdecidingwhetherornottheyarehomeomorphicisformidable.WehaveeithertoconstructahomeomorphismbetweenXandYor,worsestill,toprovethatnosuchhomeomorphismexists.Wetheretrytoreflecttheproblemalgebraically
FREE PRODUCTS OF GROUPS AND FREE GROUPS
Get PDFOne can use van Kampen’s theorem to calculate fundamental groups for topological spaces that can be decomposed into simpler spaces. Thus we can see that there is a commutative diagram including A∩B into A and B and then another inclusion from A&B into s2 and that there is a corresponding diagram of homomorphism b/w the fundamental groups of each subspace. It is clear from this that the fundamental group of s2 is trivial
BIOREMEDIATION OF COPPER (II) FROM AQUEOUS SOLUTION USING TAMARIND KERNEL POWDER
Get PDFHeavy metal pollution is nowadays one of the most important environmental concerns. Anthropogenic activities like metalliferous mining and smelting, agriculture, waste disposal or industry discharge a variety of metals such as Ag, As, Au, Cd, Co, Cr, Cu, Hg, Ni, Pb, Pd, Pt, Rd, Sn, Th, U and Zn, which can produce harmful effects on human health when they are taken up in amounts that cannot be processed by the organism. Physical and chemical methods have been proposed for the removal of these pollutants. Conventional methods to remediate heavy metals contaminated site are excavation and solidification/ stabilization, these technologies are suitable to control contamination but not permanently remove heavy metals. Nevertheless, they have some disadvantages, among them cost-effectiveness limitations, generation of hazardous by-products or inefficiency. Biological methods solve these drawbacks since they are easy to operate, do not produce secondary pollution. Heavy metals having relatively high density are toxic at low concentration. Microorganisms and plant are usually used for the removal of heavy metals. Bioremediation
is increasingly considered for clean-up of metal contaminated and polluted ecosystem. All the metals are toxic, but some of these are useful in low concentration. These large verity of heavy metals cause serious water pollutio
OPTICAL PROPERTIES OF NANOCRYSTALLINE NIS AND NANOPARTICLES
No full textA hydrothermal method combining a calcination process was conducted to synthesize nickel sulphate(NiS)hierarchical architectureswithcontrollablemorphologiesandsizes.First,severalhollowNiShierarchicalarchitectures assembled by NiSnanosheets had been synthesized through the solvothermal method. The nucleationmediated mechanism overwhelmingly determined the morphology of hollowNiSarchitectures through tuning the nucleation rate. The NiSspheres could be formed in the case of high nucleation rate. However, NiS hierarchical architecture could be obtained from the precursor without changing their morphologies by a simple calcination procedure. 
REVIEW OF SPECTROSCOPIC INVESTIGATION ON FUNDAMENTAL MODES OF DFT STUDIES OF PURE PYRAZINEAMIDE
Get PDFA probe into the literature survey clearly reveals no work has been administered for the synthesis of pyrazinamide(TLC) using Teraphthaldehyde . therefore this study aimed to figure and produce highly effective medicinal hydrazide derivatives are synthesized from Schiff base route. The structure of the ligand THC and its complexes were carried various spectral studies. From these studies, i do know about the knowledge of chemistry and spectroscopy. The main objective of this study is to synthesis of pyrazineamide and teraphthaledehyde to determine the structure through the analytical (elemental and TLC) and spectral (IR, H1 NMR and C13 NMR) methods of characterizatio
MARXIST ELEMENTS IN CHARLES DICKENS’S NOVEL HARD TIMES
Get PDFIn the novel Hard Times has the Marxist components become centrality issues appeared by dickens. The current examination is made through writing survey and meant to uncover the impacts of Marxist perspectives in Dickens\u27 tale. In this novel, one can understand that there are class contrasts and battles that are identified with Marxist musings. Like Marxists, the characters of the novel attempt to begin a negative mark against the decision class abuse. To depict this abuse Dickens expresses that the standards of middle class or entrepreneur managers don\u27t allow their workers to carry on like individuals who have intelligence and reason. Because of the business people, the laborers\u27 abilities and capacities are disregarded. Thus, this investigation shows that in Dickens\u27 tale Hard Times the impacts of Marxist perspectives are underscored
THE REPRESENTATION OF LOVE AND VIOLENCE AS A TRAGEDY OF PASSION IN EMILY BRONTE’S WUTHERING HEIGHTS.
Get PDFEmily Bronte, the highly imaginative novelist of passion of the 19th century produced only one novel Wuthering Heights in 1847. Influenced by the times and social background and life experiences her novel reflects a vision of human nature and of the society in which she lived. In Wuthering Heights -Bronte tells a story of tragedy of passion in its two aspects of love and violence. This study presents Bronte’s view of the nature of man and of the world in which he existed from different aspects. By analyzing the two main characters different personalities, the study reveals the internal reason of the tragedy. This study also deals with women’s status and the patriarchal society at that time, showing the influence of the society in which they lived which was intensifying man’s basic corruption. In addition, it also focuses on how Bronte’s success stems from the fact that she was able to present her vision obliquely and imaginatively. Bronte could portray amoral beings like Catherine and Heath cliff with total honesty and understanding, yet remain completely aware of what the inevitable consequences of their behavior must be. From these analyses, people can reach a systematic and profound understanding of the causes of the tragedy of passion, and thus will grasp the connotation of the novel comprehensively and accurately
A REVIEW OF STUDIES ON CONTENT AND LANGUAGE INTEGRATED LEARNING )CLIL) FORM 2011 TO 2020
No full textContent and Language Integrated Learning (CLIL) has gotten a mainstream and compelling way to deal with language schooling for over 10 years. Subsequently, this article expects to audit concentrates on CLIL and examines 28 investigations distributed in three critical diaries between the years 2011 and 2018. It attempts to analyze the investigations regarding study setting, members, technique and general topics. After this principled survey it has been found out that a big part of the CLIL considers are led in Spain, a lion\u27s share of them incorporate optional training understudies as exploration gathering, and the greater part of them utilize subjective techniques to accumulate information. The survey likewise reveals some insight into the new patterns in CLIL concentrates by inspecting the picked concentrates as far as broad subjects. To this end, content investigation strategy is utilized. As per the investigation it is discovered that an extraordinary dominant part of the CLIL examines centre around bilingual schooling and students\u27 etymological accomplishments in CLIL programs. In view of the discoveries, the survey finishes up with proposals for future examination and CLIL usage
DR.FAUSTUS :THEIST OR ATHEIST
Get PDFDr. Faustus is the best yet the most disputable of Marlowe\u27s plays. Among the reasons for debate, regardless of whether Dr. Faustus is a skeptic or theist merits most extreme consideration. This paper is proposed to manage the issue. Despite the fact that at different phases of the improvement of the activity, Dr. Faustus recants Trinity, resorts to magic, gets blameworthy of demoniality, for which he is called a skeptic, the force of his later desire for having reclamation and the devastation of his self causes him to arise as a theist. Without these characteristics, Dr. Faustus is said to the exemplification of the personality of Christopher Marlowe himself, who was a skeptic or an individual from an skeptic gathering. Hence, it is likewise an object of conversation to relate Dr. Faustus with Marlowe
COPPER-CATALYZED AMINATION OF SILYL KETENE ACETALS WITH N_CHLOROAMINES
Get PDFA copper(I)/2,20-bipyridyl complex catalyzes an amination reaction of silyl ketene acetals with N-chloroamines, presenting a new preparative method of R-amino esters. Amines intrinsically possess a nucleophilic property. Their nucleophilic substitution reactions present con- ventional preparative methods of substituted amines. Transition-metal-catalyzed cross-coupling reactions of aryl halides with amines are also powerful methods for the formation of C N bonds.1 An alternative pathway to substituted amines has recently become available by the use of electrophilic amination reagents together with nu- cleophilic organometallic species.2 For example, Johnson and co-workers have reported their pioneering research on copper- and nickel-catalyzed amination reactions of diarylzinc compounds using N-hydroxyl(dialkyl)amine derivatives as the amination reagent.2e,f N-Chloroamines are also promising amination reagents with their easy availability3 as well as high reactivity.4 Jarvo and co- worker reported a nickel-catalyzed amination reaction of diarylzinc compounds with N-chloro(dialkyl)amines, which formed tertiary anilines.2k Similarly, secondary ani- lines are produced by the reaction of in situ-generated N-chloro(monoalkyl)amines with arylmagnesium reagents in the presence of an excess amount of titanium(IV) isopropoxide.2l,5 Furthermore, transition-metal-catalyzed direct C H amination reactions of aromatic compounds with N-chloro(dialkyl)amines have been developed byMiura,6 Yu,7 and Glorius.8,9 It is also possible to intro- duce an amino group at the R-positions of carbonyl compounds by the reaction of their lithium enolates with N-chloroamines,10,11 although the substrate scope is limited probably due to the strongly basic reaction conditions as well as competing side reactions such as a chlorina- tion reaction. We envisaged that an analogous amination reaction of carbonyl compounds would become feasible under milder conditions if it is assisted by transition-metal catalysts. Herein we report that a copper(I)/2,20-bipyridyl complex successfully catalyzes an amination reaction ofsilyl ketene acetals with N-chloroamines to afford R-aminoesters