Evolution of the first metabolic cycles.

A new approach for fabrication of bulk MMCs using Accumulative Channel-die Compression Bonding (ACCB)

A new severe plastic deformation (SPD) based technique entitled Accumulative channel-die compression bonding (ACCB) is proposed for the fabrication of high strength multi-layered Al/Cu composites for the first time. In order to primarily demonstrate the capabilities of ACCB in the fabrication of metal matrix composites (MMCs), AA 1050 and pure Cu strips were processed. The primary Al/Cu sandwic...

Calcium and vitamin D supplementation effects on metabolic factors, menstrual cycles and follicular responses in women with polycystic ovary syndrome: A systematic review and meta-analysis

Background: Polycystic ovary syndrome (PCOS) is the most popular endocrine disorder in reproductive age with unknown etiology and many comorbidities. This systematic review focused on the effectiveness of calcium and vitamin D (Ca/ Vit.D) supplementation on metabolic factors, menstrual cycles, and follicular responses in PCOS patients. Methods: Relevant studies were identified from the followi...

On the Development Towards the Modern World: A Plausible Role of Uncoded Peptides in the RNAWorld

Feinberg G, Shapiro R (1980) Life Beyond Earth. Morrow, New York Kauffman S (1994) At Home in the Universe. Oxford University Press, New York Morowitz HJ (1968) Energy Flow in Biology. Academic Press, New York Morowitz HJ (1999) A theory of biochemical organization, metabolic pathways, and evolution. Complexity 4:39–53 Orgel LE (2008) The Implausibility of metabolic cycles on the Prebiotic Eart...

Influences of temporal evolution of ground motion frequency content on developed dynamic ratcheting in SDOF systems

Dynamic Ratcheting (DR) is a nonlinear dynamic phenomenon occurring in hysteretic damping systems. It means the structural plastic deformation increases asymmetrically in successive cycles under an earthquake excitation. Although it is generally recognized that DR is closely related to the frequency contents of an earthquake excitation applied to thestructure, no targeted analysis has bee...

The Emergence and Evolution of Political Parties of the Constitution: The First and Second Periods

The evolution of studies of political parties of constitution: The first and second periods show that the evolution of parties indicates that researchers' attitude to political pheno-mena also coincide with the evolution of political realities has been transformed, and the consideration of ideologies in the analysis of the parties have replaced with religious perspectives and anti-authoritarian...

Evaluating the Role of First Polar Body Morphologyon Rates of Fertilization and Embryo Development inICSI Cycles