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Ahmad, Naveed,Javed, Mohsin,Qamar, Muhammad A.,Kiran, Umbreen,Shahid, Sammia,Akbar, Muhammad B.,Sher, Mudassar,Amjad, Adnan Techno-Press 2022 Advances in materials research Vol.11 No.3
It includes the synthesis of pristine ZnO nanoparticles and a series of Ag-doped zinc oxide nanoparticles was carried out by reflux method by varying the amount of silver (1, 3, 5, 7 and 9% by mol.). The morphology of these nanoparticles was investigated by SEM, XRD and FT-IR techniques. These techniques show that synthesized particles are homogenous spherical nanoparticles having an average particle size of about 50-100 nm along with some agglomeration. The photocatalytic activity of the ZnO nanoparticles and Ag doped ZnO nanoparticles were investigated via photodegradation of methylene blue (MB) as a standard dye. The data from the photocatalytic activity of these nanoparticles show that 7% Ag-doped ZnO nanoparticles exhibit much enhanced photocatalytic activity as compared to pristine ZnO nanoparticles and other percentages of Ag-doped ZnO nanoparticles. Furthermore, 7% Ag-doped ZnO was made composites with sulfur-doped graphitic carbon nitride by physical mixing method and a series of nanocomposites were made (3.5, 7.5, 25, 50, 75% by weight). It was observed that the 25% composites exhibited better photocatalytic performance than pristine S-g-C 3 N 4 and pure 7% Ag-doped ZnO. Tauc's plot also supports the photodegradation results.
Stein, Gary S.,Zaidi, Sayyed K.,Stein, Janet L.,Lian, Jane B.,van Wijnen, Andre J.,Montecino, Martin,Young, Daniel W.,Javed, Amjad,Pratap, Jitesh,Choi, Je-Yong,Ali, Syed A.,Pande, Sandhya,Hassan, Moha Canadian Science Publishing 2009 Biochemistry and cell biology Vol.87 No.1
<P> Epigenetic control is required to maintain competency for the activation and suppression of genes during cell division. The association between regulatory proteins and target gene loci during mitosis is a parameter of the epigenetic control that sustains the transcriptional regulatory machinery that perpetuates gene-expression signatures in progeny cells. The mitotic retention of phenotypic regulatory factors with cell cycle, cell fate, and tissue-specific genes supports the coordinated control that governs the proliferation and differentiation of cell fate and lineage commitment. </P>
Stein, Gary S.,Zaidi, Sayyed K.,Stein, Janet L.,Lian, Jane B.,Van Wijnen, Andre J.,Montecino, Martin,Young, Daniel W.,Javed, Amjad,Pratap, Jitesh,Choi, Je-Yong,Ali, Syed A.,Pande, Sandhya,Hassan, Moha Wiley (Blackwell Publishing) 2009 Annals of the New York Academy of Sciences Vol.1155 No.1
<P>There is growing awareness that the fidelity of gene expression necessitates coordination of transcription factor metabolism and organization of genes and regulatory proteins within the three-dimensional context of nuclear architecture. The regulatory machinery that governs genetic and epigenetic control of gene expression is compartmentalized in nuclear microenvironments. Temporal and spatial parameters of regulatory complex organization and assembly are functionally linked to biological control and are compromised with the onset and progression of tumorigenesis. High throughput imaging of cells, tissues, and tumors, including live cell analysis, is expanding research's capabilities toward translating components of nuclear organization into novel strategies for cancer diagnosis and therapy.</P>