Selection silviculture has become increasingly common for longleaf pine management, yet questions remain regarding residual canopy effects on seedling survival and growth. To determine what levels of residual overstory promote adequate seedling recruitment, 600 containerized longleaf pine seedlings were planted on two sites during the 2007-2008 dormant season. To differentiate overstory from un...

OBJECTIVE Basic fibroblast growth factor (bFGF) is an important regulator of tissue growth. Previous studies have shown that low intensity pulsed ultrasound (LIPUS) stimulates bone growth. The objective of this study was to evaluate the possible synergetic effect of LIPUS and local injection of nonviral bFGF plasmid DNA (pDNA) on mandibular growth in rats. DESIGN Groups were control, blank pD...

In vitro studies have shown that amnion-produced growth factors participated in angiogenesis, re-epithelialization, and immunomodulation. The aim of our study was to investigate the growth factors and receptors produced by human amnion tissue and amniotic cells. Human amnions (hAM) were isolated, and amnion circles were dissected for in vitro analysis. Some amnion fragments were digested by the...

To ascertain the subcellular localization of the growth-associated protein GAP-43 in growth cones, we isolated growth cones from the forebrains of neonatal rats. Anti-GAP-43 immunoreactivity in these isolated growth cones (IGCs) resembled that seen in cultured growth cones in 2 respects: First, in substrate-attached IGCs, as in cultured growth cones, immunoreactivity was intracellular, punctate...

Clhaniges in RNA metabolismii during nornmal growth have been reported (2. 6, 9,11, 15). Since RNA plays a vital role in enzyme synthesis, varying enivironmental conditions and growth rates should be reflected in the RNA metabolism through these enzyme systems. Environmental effects. which are correlated with growth rate (8), have been shown to affect solmie RNA characteristics (5, 13, 18, 19)....

The Gompertz function was formulated to represent an actuarial curve, yet it often fits growth of organisms, organs and tumors. Despite numerous attempts, no consensus has been forged about the biological foundation of the broad applicability of the model. Here we revisit the Gompertzian notion of the "power to grow" and equate it with growth fraction. Aside from conferring biological interpret...

We overview recent progress in growth aspects of group III-nitride heterostructures for deep ultraviolet (DUV) light-emitting diodes (LEDs), with particular emphasis on the growth approaches for attaining high-quality AlN and high Al-molar fraction AlGaN. The discussion commences with the introduction of the current status of group III-nitride DUV LEDs and the remaining challenges. This segues ...

This study aimed to investigate the pattern of cellular proliferation and to calculate the growth fraction of small intestinal crypts in 24 patients--eight with untreated coeliac disease (CD), six with treated CD, and 10 controls with normal villous architecture. Duodenal biopsy specimens were stained with MI-B1 antibody using an immunoperoxidase method. Positive stained crypt cells were counte...

Disruption of the physiologic balance between cell proliferation and death is a universal feature of all cancers. In general terms, human B-cell lymphomas can be subdivided into 2 main groups, low- and high-growth fraction lymphomas, according to the mechanisms through which this imbalance is achieved. Most types of low-growth fraction lymphomas are initiated by molecular events resulting in th...