a Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Ain Shams University, Cairo, 11566, Egypt b Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Helwan University, Cairo, 11431, Egypt c Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Ahram Canadian University, 6th of October, 12566, Egypt d Pharmaceutical Analytical Chemistry Departmen...

Following a simple and practical approach can minimize the headaches of calculating the components of measurement uncertainty. Basic requirements for planning an analysis, realistically estimating the magnitude of uncertainty sources, and combining uncertainty components will be presented using examples of analytical chemistry methods.

Recently the concept of regression depth has been introduced [1]. The deepest regression (DR) is a method for linear regression which is defined as the fit with the best depth relative to the data. In this paper we explain the properties of the DR and give some applications of deepest regression in analytical chemistry which involve regression through the origin, polynomial regression, the Mich...

The Beilstein Journal of Organic Chemistry (BJOC) was started in 2005 [1] as the first Open Access journal of the BeilsteinInstitut. The Beilstein-Institut is a non-profit foundation that carries out projects supporting advances in chemical sciences and related areas, particularly through information and communication. The aim of the Beilstein Journal of Organic Chemistry has been to provide a ...

In this paper we discuss the structural chemistry of (PPh(4))(2)M(WS(4))(2) (M = Co, Ni, Zn) materials. For M = Ni we and others have been unable to grow single crystals and we report the structure determination from powder diffraction. The material is triclinic (P1, a = 9.3730(2), b = 12.4951(3), c = 12.5189(3) A, alpha = 65.814(1), beta = 83.751(1), gamma = 69.571(1) degrees at T = 293 K). It...

Radiometals play an important role in diagnostic and therapeutic radiopharmaceuticals. This field of radiochemistry is multidisciplinary, involving radiometal production, separation of the radiometal from its target, chelate design for complexing the radiometal in a biologically stable environment, specific targeting of the radiometal to its in vivo site, and nuclear imaging and/or radiotherapy...

We describe the joint application of the density matrix renormalization group and canonical transformation theory to multireference quantum chemistry. The density matrix renormalization group provides the ability to describe static correlation in large active spaces, while the canonical transformation theory provides a high-order description of the dynamic correlation effects. We demonstrate th...

For the first time under the auspices of Sociedade Portuguesa de Química, the competences of two important fields of Chemistry are brought together into a single event, the 11st National Organic Chemistry Meeting and the the 4th National Medicinal Chemistry Meeting, to highlight complementarities and to promote new synergies. Abstracts of plenary lectures, oral communications, and posters prese...