Robert L Johnson Jr
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Explore the profile of Robert L Johnson Jr including associated specialties, affiliations and a list of published articles.
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25
Citations
253
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Recent Articles
1.
Ravikumar P, Bellotto D, Johnson Jr R, Hsia C
J Appl Physiol (1985)
. 2009 Oct;
107(6):1911-7.
PMID: 19833809
Young canines born at sea level (SL) and raised for 5 mo at high altitude (HA, 3,800 m), followed by return to SL before somatic maturation, showed enhanced alveolar gas...
2.
Yilmaz C, Ravikumar P, Dane D, Bellotto D, Johnson Jr R, Hsia C
J Appl Physiol (1985)
. 2009 Sep;
107(5):1569-78.
PMID: 19729592
To quantify the in vivo magnitude and distribution of regional compensatory lung growth following extensive lung resection, we performed high-resolution computed tomography at 15- and 30-cmH(2)O transpulmonary pressures and measured...
3.
Yilmaz C, Chance W, Johnson Jr R, Hsia C
Chest
. 2009 May;
135(5):1309-1314.
PMID: 19420198
Background: We developed a simple method for simulating a rebreathing maneuver to test the accuracy of the apparatus for simultaneous measurement of lung volume, diffusing capacity of the lung for...
4.
Hsia C, Wagner P, Dane D, Wagner H, Johnson Jr R
J Appl Physiol (1985)
. 2008 Aug;
105(5):1441-7.
PMID: 18719238
Although lung diffusing capacity for carbon monoxide (DL(CO)) is a widely used test of diffusive O2 transfer, few studies have directly related DL(CO) to O2-diffusing capacity (DL(O2)); none has used...
5.
Hsia C, Dane D, Estrera A, Wagner H, Wagner P, Johnson Jr R
J Appl Physiol (1985)
. 2008 Feb;
104(4):1069-79.
PMID: 18258800
We previously found that, following surgical resection of approximately 58% of lung units by right pneumonectomy (PNX) in adult canines, oxygen-diffusing capacity (Dl(O(2))) fell sufficiently to become a major factor...
6.
Hsia C, Johnson Jr R, Dane D, Wu E, Estrera A, Wagner H, et al.
J Appl Physiol (1985)
. 2007 Aug;
103(5):1496-505.
PMID: 17673565
In athletic animals the spleen induces acute polycythemia by dynamic contraction that releases red blood cells into the circulation in response to increased O(2) demand and metabolic stress; when energy...
7.
Zhang Q, Bellotto D, Ravikumar P, Moe O, Hogg R, Hogg D, et al.
Am J Physiol Lung Cell Mol Physiol
. 2007 May;
293(2):L497-504.
PMID: 17513452
We (42) previously reported differential regulation of hypoxia-inducible factors (HIF-1alpha, -2alpha, and -3alpha) mRNA in canine lungs during normal maturation and postpneumonectomy (PNX) compensatory growth in the absence of overt...
8.
Hsia C, Johnson Jr R, McDonough P, Dane D, Hurst M, Fehmel J, et al.
J Appl Physiol (1985)
. 2007 Jan;
102(4):1448-55.
PMID: 17218427
Mammals native to high altitude (HA) exhibit larger lung volumes than their lowland counterparts. To test the hypothesis that adaptation induced by HA residence during somatic maturation improves pulmonary gas...
9.
Ravikumar P, Yilmaz C, Dane D, Johnson Jr R, Estrera A, Hsia C
J Appl Physiol (1985)
. 2006 Dec;
102(3):1170-7.
PMID: 17138837
Mechanical forces imposed on lung tissue constitute major stimuli for normal lung development and postpneumonectomy (PNX) compensatory growth and remodeling. Superimposing developmental signals on PNX signals augments compensatory alveolar growth...
10.
Dane D, Hsia C, Wu E, Hogg R, Hogg D, Estrera A, et al.
J Appl Physiol (1985)
. 2006 Apr;
101(1):289-97.
PMID: 16601302
The spleen acts as an erythrocyte reservoir in highly aerobic species such as the dog and horse. Sympathetic-mediated splenic contraction during exercise reversibly enhances convective O2 transport by increasing hematocrit,...