Percutaneous fixation of anterior and posterior column acetabular fractures.

Although open reduction and internal fixation (ORIF) has been the standard of care for acetabular fractures, recent advancements in minimally invasive techniques have allowed percutaneous fixation to gain popularity. Percutaneous technique has been described in the literature as an adjuvant to ORIF. However, isolated percutaneous fixation has the advantage of limiting soft tissue disruption, length of surgery, and blood loss when compared with ORIF.

Intra-articular Radial Head Fractures In the Skeletally Immature Patient: Complications and Management.

Background: Intra-articular (IARH) and extra-articular (EARH) radial head fractures in skeletally immature patients are rare injuries that have not been well studied. The objective of this study was to investigate the rate of complications associated with IARH fractures relative to EARH fractures in pediatric patients treated at a tertiary referral children's hospital.

Methods: With IRB approval, Current-Procedural Terminology codes were used to identify all patients who underwent management of radial head and/or neck fractures between 2005 and 2012.

In vivo model to measure bone repair efficacy of nanoparticle-based drug delivery.

Bone repair required for successful arthroplasty can be compromised in patients with comorbid conditions, such as osteoporosis, diabetes mellitus, and chronic kidney disease. Biological compounds have been proposed to promote bone health and repair. The authors have designed a new animal model for testing bone promoting compounds in the in vivo environment.

Osmoregulation in Cotton in Response to Water Stress : III. Effects of Phosphorus Fertility.

Cotton (Gossypium hirsutum) (L.) was grown in a sand and nutrient solution system at two levels of phosphorus (0.5 and 5.

Abscisic Acid accumulation in cotton leaves in response to dehydration at high pressure.

Pressure-volume techniques were utilized to examine the control of abscisic acid (ABA) accumulation in dehydrated cotton (Gossypium hirsutum L. cv Tamcot SP 37) leaves. Leaves were rapidly dehydrated in a pressure chamber to a balance pressure coincident with the loss of cellular turgor, and then the pressure was either maintained at that level or released.

Synthesis and movement of abscisic Acid in water-stressed cotton leaves.

Synthesis and movement of abscisic acid (ABA) into the apoplast of water-stressed cotton (Gossypium hirsutum L.) leaves were examined using pressure dehydration techniques. The exudates of leaves dehydrated in a pressure chamber contained ABA.

Osmoregulation in Cotton in Response to Water Stress : II. LEAF CARBOHYDRATE STATUS IN RELATION TO OSMOTIC ADJUSTMENT.

Diurnal changes in tissue water potential components, photosynthesis, and specific leaf carbohydrates were examined in water stress-adapted and nonadapted cotton plants. Adapted plants exhibited lower daily minimum leaf water potentials and maintained turgor to lower leaf water potentials than nonadapted plants. Because of this turgor maintenance, photosynthesis continued in adapted plants at leaf water potentials that inhibited photosynthesis in nonadapted plants.

Osmoregulation in Cotton in Response to Water Stress : I. ALTERATIONS IN PHOTOSYNTHESIS, LEAF CONDUCTANCE, TRANSLOCATION, AND ULTRASTRUCTURE.

Cotton plants subjected to a series of water deficits exhibited stress adaptation in the form of osmoregulation when plants were subjected to a subsequent drying cycle. After adaptation, the leaf water potential coinciding with zero turgor was considerably lower than in plants that had never experienced a water stress. The relationship between leaf turgor and leaf water potential depended on leaf age.

Stomatal response of cotton to water stress and abscisic Acid as affected by water stress history.

The threshold leaf water potential required to initiate stomatal closure in cotton (Stoneville 213) became progressively more negative when plants were subjected to a series of water stress cycles. The shift in the threshold water potential required for induction of stomatal closure was dependent on the number of previous stress cycles and leaf age. The basal level of endogenous abscisic acid (ABA) in fully turgid leaves increased in response to the stress treatments, whereas the amount accumulated in response to a subsequent stress did not differ greatly among plants that had experienced different degrees of stress conditioning.

Stomatal and nonstomatal regulation of water use in cotton, corn, and sorghum.

Stomata of corn (Zea mays L.) and sorghum (Sorghum bicolor L.) responded to changes in leaf water potential during the vegetative growth phase.