While the amount of regular garbage collected countywide continues to grow, the quantity of recyclables has recently remained stagnant, Mr. Lauro said.
The latter makes sense because some nuclei pairs that have recently divided remain connected by visible filaments.
The underlying molecular mechanisms that control biomineralization have long been thought to offer the potential for new routes to synthesis of high-performance nanocomposite materials, yet these mechanisms have until recently remained elusive.
When we adopt this perspective, we begin to see the parallels among developments and forms which have until recently remained the 'ground' in relation to the 'figure' of unique developments within the nation or society.
Because of lack of identification of a natural ligand and lack of a monoclonal antibody against murine CD7, the in vivo functions of CD7 have until recently remained obscure.
Such activity dependent changes in membrane and cellular properties are arguably reflecting underlying modulation of gene expression, but to pinpoint the molecular mechanisms and targets of these changes have until recently remained elusive.
Studies on tumours with MSI phenotype have until recently remained restricted mainly to analyses of mutations in DNA sequences or production of protein as measured by immunohistochemistry.
One of the reasons for this is that although the components of the spindle checkpoint were identified more than 20 years ago in yeast, their binding site (or sites) at kinetochores have, until recently, remained elusive.
"The nation and the markets have recently experienced, and remain in the midst of, one of the most serious economic crises of the past century," said Mary L. Schapiro, the chairwoman of the commission, when she announced the proposal.
As an example, he said, the alert level for the United Nations in Pakistan had until recently remained at the lowest level despite repeated outbreaks of insurgent violence.
