Response of lichens Cladonia arbuscula subsp. mitis and Cladonia furcata to nitrogen excess

Biologia ◽  
2016 ◽  
Vol 71 (6) ◽  
Author(s):  
Ivana Králiková ◽  
Michal Goga ◽  
Ivana Biľová ◽  
Miriam Bačkorová ◽  
Martin Bačkor
Keyword(s):  
Physiological Responses ◽  
Excess Nitrogen ◽  
Nitrogen Excess

AbstractIn this study we focused on the comparison of the physiological responses to excess nitrogen (N) comparing

scholarly journals Organic nutrients and excess nitrogen in the North Atlantic subtropical gyre

2008 ◽  
Vol 5 (5) ◽  
pp. 1199-1213 ◽  
Author(s):  
A. Landolfi ◽  
A. Oschlies ◽  
R. Sanders
Keyword(s):  
Vertical Integration ◽  
North Atlantic ◽  
Accurate Estimate ◽  
Nitrogen Accumulation ◽  
Excess Nitrogen ◽  
The North ◽  
The North Atlantic ◽  
Organic Nutrients ◽  
Using Data ◽  
Nitrogen Excess

Abstract. To enable an accurate estimate of total excess nitrogen (N) in the North Atlantic, a new tracer TNxs is defined, which includes the contribution of organic nutrients to the assessment of N:P stoichiometric anomalies. We measured the spatial distribution of TNxs within the subtropical North Atlantic using data from a trans-Atlantic section across 24.5° N occupied in 2004. We then employ three different approaches to infer rates of total excess nitrogen accumulation using pCFC-12 derived ventilation ages (a TNxs vertical integration, a one end-member and a two-end member mixing model). Despite some variability among the different methods the dissolved organic nutrient fraction always contributes to about half of the TNxs accumulation, which is in the order of 9.38±4.18×1011 mol N y−1. We suggest that neglecting organic nutrients in stoichiometric balances of the marine N and P inventories can lead to systematic errors when estimating deviations of nitrogen excess or deficit relative to the Redfield ratio in the oceans. For the North Atlantic the inclusion of the organic fraction to the excess nitrogen pool leads to an upward revision of the N supply by N2 fixation to 10.2±6.9×1011 mol N y−1.

scholarly journals Organic nutrients and excess nitrogen in the North Atlantic subtropical gyre

2008 ◽  
Vol 5 (1) ◽  
pp. 685-724 ◽  
Author(s):  
A. Landolfi ◽  
A. Oschlies ◽  
R. Sanders
Keyword(s):  
North Atlantic ◽  
N2 Fixation ◽  
Accurate Estimate ◽  
Nitrogen Accumulation ◽  
Excess Nitrogen ◽  
The North ◽  
The North Atlantic ◽  
Organic Nutrients ◽  
Using Data ◽  
Nitrogen Excess

Abstract. To enable an accurate estimate of total excess nitrogen (N) in the North Atlantic a new tracer, TNxs, is defined which includes the contribution of organic nutrients to the assessment of N:P stoichiometric anomalies. We estimate the spatial distribution of TNxs within the North Atlantic using data from a trans-Atlantic section across 24.5° N conducted in 2004. We then employ three different approaches to infer rates of total excess nitrogen accumulation using pCFC-12 derived ventilation ages (a TNxs vertical integration, a one end-member and a two-end member mixing model). Despite some variability among the different methods the dissolved organic nutrient fraction always contributes to about half of the TNxs accumulation, which is in the order of 9.38±4.18×1011 mol N y−1. Here we suggest that neglecting organic nutrients in stoichiometric balances of the marine N and P inventories can lead to systematic errors when estimating a nitrogen excess or deficit relative to the Redfield ratio in the oceans. For the North Atlantic the inclusion of the organic fraction leads to an upward revision of the N supply by N2 fixation to 10.2±6.9×1011 mol N y−1. This enhanced estimate of nitrogen fixation reconciles the geochemical estimates of N2 fixation derived from excess nitrate and the direct estimates from N2 fixation measurements.

Misophonia: An Evidence-Based Case Report

2020 ◽  
Vol 29 (4) ◽  
pp. 685-690
Author(s):  
C. S. Vanaja ◽  
Miriam Soni Abigail
Keyword(s):  
Quality Of Life ◽  
Case Report ◽  
Case History ◽  
Pure Tone ◽  
Physiological Responses ◽  
Evidence Based ◽  
Management Option ◽  
Pure Tone Audiogram

Purpose Misophonia is a sound tolerance disorder condition in certain sounds that trigger intense emotional or physiological responses. While some persons may experience misophonia, a few patients suffer from misophonia. However, there is a dearth of literature on audiological assessment and management of persons with misophonia. The purpose of this report is to discuss the assessment of misophonia and highlight the management option that helped a patient with misophonia. Method A case study of a 26-year-old woman with the complaint of decreased tolerance to specific sounds affecting quality of life is reported. Audiological assessment differentiated misophonia from hyperacusis. Management included retraining counseling as well as desensitization and habituation therapy based on the principles described by P. J. Jastreboff and Jastreboff (2014). A misophonia questionnaire was administered at regular intervals to monitor the effectiveness of therapy. Results A detailed case history and audiological evaluations including pure-tone audiogram and Johnson Hyperacusis Index revealed the presence of misophonia. The patient benefitted from intervention, and the scores of the misophonia questionnaire indicated a decrease in the severity of the problem. Conclusions It is important to differentially diagnose misophonia and hyperacusis in persons with sound tolerance disorders. Retraining counseling as well as desensitization and habituation therapy can help patients who suffer from misophonia.

Physiological Responses of Spider Phobics and Nonphobics to Viewing Slides

2002 ◽  
Author(s):  
Rebecca L. Stump ◽  
Judith C. Conger ◽  
Scott Vrana
Keyword(s):  
Physiological Responses

Vasopressin and Telemetered Physiological Responses

1992 ◽  
Author(s):  
Helen M. Murphy ◽  
Cyrilla H. Wideman
Keyword(s):  
Physiological Responses

Children's Physiological Responses to Emotional Films: Social and Emotional Outcomes

2007 ◽  
Author(s):  
Arianne D. Stevens ◽  
Beverly J. Wilson ◽  
Alesha M. Muljat ◽  
Rachel A. Montague ◽  
Natalie P. Goodwin
Keyword(s):  
Physiological Responses ◽  
Social And Emotional ◽  
Emotional Outcomes

Psychophysiological Responses of Pilots in Hypoxia Training at 7000 and 7500 m

2020 ◽  
Vol 91 (10) ◽  
pp. 785-789
Author(s):  
Dongqing Wen ◽  
Lei Tu ◽  
Guiyou Wang ◽  
Zhao Gu ◽  
Weiru Shi ◽  
...  
Keyword(s):  
Heart Rate ◽  
Psychomotor Performance ◽  
Physiological Responses ◽  
Arterial Oxygen Saturation ◽  
Arterial Oxygen ◽  
Awareness Training ◽  
Similar Frequency ◽  
Psychophysiological Responses ◽  
The Mean ◽  
Training Protocol

INTRODUCTION: We compared the physiological responses, psychomotor performances, and hypoxia symptoms between 7000 m and 7500 m (23,000 and 24,600 ft) exposure to develop a safer hypoxia training protocol.METHODS: In altitude chamber, 66 male pilots were exposed to 7000 and 7500 m. Heart rate and arterial oxygen saturation were continuously monitored. Psychomotor performance was assessed using the computational task. The hypoxic symptoms were investigated by a questionnaire.RESULTS: The mean duration time of hypoxia was 323.0 56.5 s at 7000 m and 218.2 63.3 s at 7500 m. The 6-min hypoxia training was completed by 57.6% of the pilots and 6.1% of the pilots at 7000 m and at 7500 m, respectively. There were no significant differences in pilots heart rates and psychomotor performance between the two exposures. The Spo2 response at 7500 m was slightly severer than that at 7000 m. During the 7000 m exposure, pilots experienced almost the same symptoms and similar frequency order as those during the 7500 m exposure.CONCLUSIONS: There were concordant symptoms, psychomotor performance, and very similar physiological responses between 7000 m and 7500 m during hypoxia training. The results indicated that 7000-m hypoxia awareness training might be an alternative to 7500-m hypoxia training with lower DCS risk and longer experience time.Wen D, Tu L, Wang G, Gu Z, Shi W, Liu X. Psychophysiological responses of pilots in hypoxia training at 7000 and 7500 m. Aerosp Med Hum Perform. 2020; 91(10):785789.

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