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Shahzad, Rauf,Kim, TaeWan,Mun, Jihun,Kang, Sang-Woo IOP Pub 2017 Nanotechnology Vol.28 No.50
<P>Two-dimensional (2D) copper chalcogenides (Cu<SUB>2−<I>x</I> </SUB> <I>X</I> where <I>X</I>?=?S, Se, Te) have had much attention regarding various applications due to their remarkable optical and electrical properties, abundance, and environmentally friendly natures. This work indicates that highly uniform Cu<SUB>2−<I>x</I> </SUB>S (where 0?<U><</U>?<I>x</I>?<U><</U>?1) nanosheets can be obtained by the two-step method of Cu deposition by sputtering with precisely controlled and extremely low growth rate followed by vapor-phase sulfurization. The phase transformations of thin Cu<SUB>2−<I>x</I> </SUB>S films upon the Cu seed layer thickness are investigated. A unique thickness-constrained synthesis process using vapor-phase sulfurization is employed here, which evolves from a vertical to lateral growth mechanism based on the optimization of the Cu seed layer thickness. Atomically thin 2D <I>β</I>-Cu<SUB>2</SUB>S film was successfully synthesized using the thinnest Cu seed film. We have systematically investigated the phase- and thickness-dependent optical properties of Cu<SUB>2−<I>x</I> </SUB>S films at room temperature. Micro-photoluminescence (PL) spectroscopy reveals that the 2D <I>β</I>-Cu<SUB>2</SUB>S film possesses a direct band gap with an energy of 1.1 eV while the PL intensities are greatly suppressed in the multilayer Cu<SUB>2−<I>x</I> </SUB>S (where 0?≤?<I>x</I>?<U><</U>?1).</P>
Changing Trends of Adult Lymphoma in the Kingdom of Saudi Arabia - Comparison of Data Sources
Rauf, Muhammad Shahzad,Akhtar, Saad,Maghfoor, Irfan Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.5
Background: Lymphoma is one of the most common malignancies affecting the young Saudi population. This disease has diversified pathologies and clinical stages that necessitate well optimized clinical management. Regular updates of epidemiological behavior of lymphoma from various parts of the world are available but studies from the Kingdom of Saudi Arabia (KSA) in this field are not consistent. Objectives: The aim of this study was to investigate the current trends in presentation and distribution of lymphoma with special reference to incidence and mortality, gender, age, histopathological subtypes, and clinical stages at King Faisal Specialist Hospital and Research Centre (KFSH&RC). Materials and Methods: Our study included lymphoma data from Saudi Cancer Registry, and relative comparison against KFSH&RC tumor registry data, Gulf country data and International Agency for Research on Cancer data. Results: Common tumors in the West (lung, colon, and prostate) were found to be much less frequent in KSA while leukemia, lymphoma and thyroid cancers were more common. Non-Hodgkin Lymphoma (NHL) ranked 3rd most common cancer with age-adjusted incidence of 6/100,000. Estimated age adjusted mortality was 4/100,000 in KSA. There was a peak rise in incidence of lymphoma in 1997-2007. Most common NHL was diffuse large B cell lymphoma at KFSH&RC. A total of 434 cases were diagnosed in 5 years with 55% of them at advanced stage and 35% demonstrating bulky disease and high risk. KFSH&RC registered 35% of Hodgkins and 21% of total NHL identified in entire Saudi Cancer Registry, 2009. Conclusions: Results of this study are very unique, and reveal diverse trends. The findings provide valuable insights in the understanding of current epidemiological features of lymphoma in this part of the world.
Biomass Partitioning and Genetic Analyses of Salinity Tolerance in Sunflower (Helianthus annuus L.)
Rauf, Saeed,Shahzad, Muhammad,da Silva, Jaime A. Teixeira,Noorka, Ijaz Rasool 한국작물학회 2012 Journal of crop science and biotechnology Vol.15 No.3
Biomass partitioning was studied in sunflower (Helianthus annuus L.) inbred lines and their hybrids differing in salinity resistance. Differential biomass partitioning was observed among resistant and susceptible lines as well as within resistant lines, which were grown in large pots. Traits such as number of dead leaves and total number of nodes may be used as dominant markers for understanding the mechanism of resistance to salinity. Multi-location trials differing for salinity levels showed low and non-significant heritabilities across the environment for biochemical traits showing their sensitivity to the environment and a significant G ${\times}$ E interaction. Thus selection could only possible within the salinity level for these traits. Contrastingly, morphological traits such as number of nodes showed significant heritabilities (narrow or broad sense) across the environment. These traits may be exploited by the selection of inbred lines across or with salinity levels. Among various salinity levels, 12 $dSm^{-1}$ was found to be feasible for screening and selection as it promoted the additive type of gene action.
Biomass Partitioning and Genetic Analyses of Salinity Tolerance in Sunflower (Helianthus annuus L.)
Saeed Rauf,Muhammad Shahzad,Jaime A. Teixeira da Silva,Ijaz Rasool Noorka 한국작물학회 2012 Journal of crop science and biotechnology Vol.15 No.3
Biomass partitioning was studied in sunflower (Helianthus annuus L.) inbred lines and their hybrids differing in salinity resistance. Differential biomass partitioning was observed among resistant and susceptible lines as well as within resistant lines, which were grown in large pots. Traits such as number of dead leaves and total number of nodes may be used as dominant markers for understanding the mechanism of resistance to salinity. Multi-location trials differing for salinity levels showed low and non-significant heritabilities across the environment for biochemical traits showing their sensitivity to the environment and a significant G X E interaction. Thus selection could only possible within the salinity level for these traits. Contrastingly, morphological traits such as number of nodes showed significant heritabilities (narrow or broad sense) across the environment. These traits may be exploited by the selection of inbred lines across or with salinity levels. Among various salinity levels, 12 dSm-1 was found to be feasible for screening and selection as it promoted the additive type of gene action.