With the discovery of CP violation in the B mesons, and the precise measurement of the angle β [1] of the Unitarity Triangle (UT), the experimental effort focus on the measurements of other parameters to over-constraint the Cabibbo-KobayashiMaskawa (CKM) matrix [2]. In particular the information on the side Rb opposite to the angle β is crucial to test the standard model prediction for CP viola...

Graphene, a new member of the carbon family, was used as an adsorbent due to its exceptional capability to remove Rhodamine B (RB) and Malachite Green (MG), two organic dyes, from aqueous solutions. Adsorption kinetics of RB and MG onto graphene and adsorption capacity of the adsorbent were studied. Also the effects of parameters, including pH, contact time, temperature, and adsorbent dosage we...

Introduction: The isotopic compositions of moderately volatile elements like Li, K, Rb may provide key information to further enhance our understanding of the early history of our Solar System (e.g., [1,2]). Here we discuss technical aspects of our efforts to precisely determine the Rb isotopic composition of meteorites and present a hint for a possible nucleosynthetic effect suggested by corre...

The absence of wild type retinoblastoma (Rb) gene expression in a wide variety of human solid tumors suggests an etiologic role for this tumor suppressor gene in human cancer. We have evaluated the involvement of Rb gene inactivation in the pathogenesis and progression of human lymphoma and leukemia. We examined the genomic configuration and transcription of the Rb gene in cultured cell lines a...

This work demonstrates a central role for the retinoblastoma (Rb) family in driving the transcriptional program of induced and replicative senescence. HeLa cervical carcinoma cells rapidly undergo senescence when the human papillomavirus (HPV) type 18 E7 gene in these cells is repressed by the bovine papillomavirus (BPV) E2 protein. This senescence response requires the endogenous Rb pathway bu...

Background In sequential labelling a path goes over the image and, depending on the relationship between 2 adjacent vertex, assigns labels to groups of pixels. The traditional paths used in this method are 2 orthogonal raster paths. To determine whether adjacent pixels are similar, we will use Nayar and Bolle reflectance ratio criterion. 2 labels a and b are equivalent if max{a −Rb Ra +Rb , Ga ...

Este estudo teve o propósito de avaliar a influência do estresse hídrico provocado em experimento seca longa duração na floresta (ESECAFLOR) e da conversão área agrícola, sobre os atributos microbiológicos solo Floresta Nacional Caxiuanã. Foram escolhidas quatro áreas, sendo duas floresta: controle (Parcela A) exclusão água chuva B); mais duas: secundária (FS) Roça. Avaliaram-se umidade gravimé...