Positive splittings of matrices and their nonnegative Moore-Penrose inverses

In this short note we study necessary and sufficient conditions for the nonnegativity of the Moore-Penrose inverse of a real matrix in terms of certain spectral property shared by all positive splittings of the given matrix

Copper-catalyzed domino one-pot synthesis of 2-(arylselanyl)arylcyanamides

Domino C–Se cross-coupling of 2-(iodoaryl)selenoureas with aryl iodides has been accomplished in the presence of a copper(I)–1,1-phenanthroline complex at moderate temperature. The reactions involve intra- and intermolecular C–Se cross-coupling to give the substituted 2-(arylselanyl)arylcyanamides. Aryl iodides having electron-donating and -withdrawing substituents are compatible, affording the targetselanyl ethers in high yield

Genetic Variation of Isozyme Polyphenol Oxidase (PPO) Profiles in Different Varieties of <i>Capsicum annuum</i> L.

The genus <i>Capsicum</i> commonly known as chilli pepper is a major spice crop and is of cosmopolitan in distribution. Native polyacrylamide gel electrophoresis (Native PAGE) was used to study the polyphenol oxidase (PPO) isozyme variation in 21 varieties of <i>Capsicum annuum</i> L. A maximum of 4 PPO bands were scored in five varieties i.e., Ca14, Ca15, Ca16, Ca19 & Ca20, while the minimum (2 bands) was observed in four varieties (Ca3, Ca10, Ca13 & Ca17). 15 pair wise combinations showed highest average per cent similarity (100%) and the UPGMA dendrogram represented low genetic diversity. The present study revealed that considerable intraspecific differences were found in the varieties. Thus the results obtained could be used in fingerprinting the genotypes

Copper promoted synthesis of tetrazoles and further conversion into diaryl tetrazoles through C-N cross-coupling approach

Efficient tandem three component method has been demonstrated for the synthesis of substituted tetrazoles under mild reaction conditions using copper catalysis. Green solvent DMSO has been utilized and the reaction has been carried out at room temperature which establishes that our method is green synthetic approach. Variety of substrates readily undergo the optimized reaction conditions to provide their respective target products in good to excellent yields. In addition we have observed regioselective compounds depending on the substituents of phenyl ring. All the reactions are rapid, facile and are accomplished at room temperature. The reactions are of general application, clean and efficient. Furthermore we have confirmed that no other by-products could be identified during our experimental reaction process. In addition, C-N cross-coupling have been developed with phenyltetrazoleamines and aryl iodide under moderate reaction conditions

A Case Study on Corporate Social Responsibility: A Study on Awareness of CSR – Evidence from Private Company in Erbil

The purpose of this research is to analyze the concept of Corporate Social Responsibility (CSR) and how this responsibility is capable to improve the corporate reputation. In order to do that one of the car companies in Erbil, has been chosen to have an overview about the customers, whether they have a system or a certain procedure toward customers, suppliers, shareholders and community as a whole. In previous years, organizations believe that there is a negative relationship between business and being socially responsible, but in now a days there is external pressure for the organizations to be socially responsible by monitoring the organizations and reporting their social performance so that the company value and the level confidence of the stakeholders increase. A survey of an Iraqi Private company has been taken and analyzed as the best example for the subject research. Corporate Reputation plays very specific and important role in any company as it is usually reflected on the decisions made by any company to approach or to do business with in the company. Corporate Social responsibility is considered as an advantage that should be carefully managed

Ligand-free copper-catalyzed synthesis of substituted benzimidazoles, 2-aminobenzimidazoles, 2-aminobenzothiazoles, and benzoxazoles

The synthesis of substituted benzimidazoles, 2-aminobenzimidazoles, 2-aminobenzothiazoles, and benzoxazoles is described via intramolecular cyclization of o-bromoaryl derivatives using copper(II) oxide nanoparticles in DMSO under air. The procedure is experimentally simple, general, efficient, and free from addition of external chelating ligands. It is a heterogeneous process and the copper(II) oxide nanoparticles can be recovered and recycled without loss of activity