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14 risultati
Direct observation of local xylem embolisms induced by soil drying in intact Zea mays leaves.
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The vulnerability of vascular plants to xylem embolism is closely related to their stable long-distance water transport, growth, and survival. Direct measurements of xylem embolism are required to understand what causes embolism and what strategies plants employ against it. In this study,
Histopathological and biochemical changes following fat embolism with administration of corn oil micelles: a new animal model for fat embolism syndrome.
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Several experimental models have been used to produce intravascular fat embolism. We have developed a simple technique to induce fat embolism using corn oil emulsified with distilled water to form fatty micelles. Fat embolism was produced by intravenous administration of these fatty micelles in
Subcutaneous corn oil injections, fat embolization syndrome, and death.
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An unlicensed practitioner performing subcutaneous injections of large volumes of corn oil caused the death of one of her clients and life-threatening neurologic complications of a second client from systemic fat embolism. Several additional clients also came forward to report other serious
Root xylem embolisms and refilling. Relation To water potentials of soil, roots, and leaves, and osmotic potentials of root xylem Sap
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Embolism and refilling of vessels was monitored directly by cryomicroscopy of field-grown corn (Zea mays L.) roots. To test the reliability of an earlier study showing embolism refilling in roots at negative leaf water potentials, embolisms were counted, and root water potentials (Psiroot) and
From neurogenic pulmonary edema to fat embolism syndrome: a brief review of experimental and clinical investigations of acute lung injury and acute respiratory distress syndrome.
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Acute respiratory distress syndrome (ARDS) is the most devastating form of acute lung injury (ALI) or pulmonary edema (PE). We presented the experimental studies and clinical investigations of two serious forms of ALI. Drastic and severe PE could be induced by intracranial hypertension or cerebral
Nitric oxide mediates acute lung injury caused by fat embolism in isolated rat's lungs.
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BACKGROUND
The involvement of nitric oxide (NO) in acute lung injury (ALI) induced by fat embolism (FE) has not been investigated. The present study elucidated the role of NO in ALI because of FE.
METHODS
FE was produced by introduction of fatty acid (corn oil micelles) into the isolated rat's
Effects of phorbol myristate acetate and sivelestat on the lung injury caused by fat embolism in isolated lungs.
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BACKGROUND
Fat embolism syndrome (FES) associated with acute lung injury (ALI) is a clinical condition following long bone fracture. We have reported 14 victims due to ALI with FES. Our laboratory has developed an animal model that produced fat emboli (FE). The major purpose of this study was to
Xylem embolism and drought-induced stomatal closure in maize.
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Water relations during drought and xylem vulnerability to embolism were studied on four maize ( Zea mays L.) genotypes having contrasting grain yields under drought conditions. Drought provoked a drop in xylem pressure, leaf water potential and whole-plant transpiration. Transpiration was reduced to
In vivo dynamic analysis of water refilling in embolized xylem vessels of intact Zea mays leaves.
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OBJECTIVE
The refilling of embolized xylem vessels under tension is a major issue in water transport among vascular plants. However, xylem embolism and refilling remain poorly understood because of technical limitations. Direct observation of embolism repair in intact plants is essential to
N-acetylcysteine attenuates acute lung injury induced by fat embolism.
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OBJECTIVE
Fat embolism syndrome is a clinical issue in subjects with long-bone fracture. It may lead to acute lung injury. The mechanisms and therapeutic regimen remain unclear. The present study was designed to investigate the pathologic and biochemical changes after fat embolization in isolated
Elevated [CO2 ] alleviates the impacts of water deficit on xylem anatomy and hydraulic properties of maize stems.
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Plants can modify xylem anatomy and hydraulic properties to adjust to water status. Elevated [CO2 ] can increase plant water potential via reduced stomatal conductance and water loss. This raises the question of whether elevated [CO2 ], which thus improves plant water status,
Histopathology of the heart from rats fed rapeseed oils.
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The cardiopathogenicity of oils from new, low erucic acid (EA) rapeseed, Brassica napus, cv Tower (0.88 per cent EA) and Brassica napus, cv 1788 (3.6 per cent EA) were tested on rats following 18 weeks of feeding. Oil from Brassica napus, cv Target, with 38.9 per cent EA served as a positive control
A response to: Limitations within "The Limits to Tree Height".
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Here we respond to the communication in American Journal of Botany (96: 542-544 in this issue) by Netting, who proposes several ways in which our paper "The Limits to Tree Height" (Nature 428: 851-854) may have erred in estimating the biophysical limits to height growth in Sequoia sempervirens. We
Functional xylem anatomy in root-shoot junctions of six cereal species.
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In cereals, the formation of safety zones in the root-shoot junction could protect the vessels of roots from embolism originating in the shoot. The root-shoot junction was examined both anatomically, with a light microscope, and experimentally, using a pressurized-air method, in the base of seminal
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