Oxygen consumption of Limnocalanus macrurus Sars (Calanoida, Copepoda) in relation to environmental conditions

1973 ◽  
Vol 51 (8) ◽  
pp. 877-885 ◽  
Author(s):  
J. C. Roff
Keyword(s):  
Oxygen Consumption ◽  
Respiration Rate ◽  
Environmental Parameters ◽  
Arctic Lakes ◽  
Experimental Population ◽  
Lethal Temperature ◽  
Limnocalanus Macrurus ◽  
Relationship Of ◽  
The Relationship

The oxygen consumption of Limnocalanus macrurus and its relationship to a number of environmental parameters were determined on specimens from two arctic lakes, both in the laboratory and in situ. The Q10 from 0 to 10 °C was 1.93 and from 5 to 15 °C was 2.20. The respiration rate increased shortly after capture of the animals and then declined to steady levels within 6 h after capture. Experimental population densities within the range of 0.1 to 2 animals/ml had no effect on the adult respiration rate nor did the volume of the respiratory container. Experiments carried out in situ showed no relationship between depth of incubation and respiration rate, and did not differ significantly from the laboratory respiration rates.The upper lethal temperature was about 18 °C but animals could briefly withstand exposure to 21 °C. Lethal oxygen concentration was dependent on temperature, being about 0.8 mg/liter at 0 °C. The relationship of these lethal levels to the distribution of the species is discussed.

LV oxygen consumption and pressure-volume area: role of norepinephrine and verapamil

1991 ◽  
Vol 261 (1) ◽  
pp. H77-H82 ◽  
Author(s):  
N. Chung ◽  
X. Wu ◽  
E. L. Ritman
Keyword(s):  
Oxygen Consumption ◽  
Systolic Pressure ◽  
Left Ventricular ◽  
Baroreceptor Reflex ◽  
Regression Slopes ◽  
Relationship Of ◽  
The Relationship ◽  
Baseline State

The effect of norepinephrine or verapamil on the relationship of left ventricular (LV) myocardial oxygen consumption (MVO2) and systolic pressure-volume area (PVA) was investigated in hearts within the never-opened thorax of dogs with blocked baroreceptor reflex. LV chamber volumes and myocardial blood flow were measured using a fast computed tomography scanner. At 10 micrograms/min delivery rate of norepinephrine, MVO2 (mJ.g-1.cycle-1) equals (2.30 +/- 0.48) PVA + (20.60 +/- 4.24) (n = 11; 1 mJ.g-1.cycle-1 is equivalent to 0.563 ml O2.100 g-1.min-1 at 112 beats/min). With verapamil infusion, MVO2 equals (2.57 +/- 1.33)PVA + (10.73 +/- 3.16) (n = 17). The regression slopes did not differ (P greater than 0.25) for any of the conditions. At comparable PVA values the norepinephrine group showed an increase of MVO2 compared with the prenorephrine baseline state (P less than 0.01), and the verapamil group showed a reduction of MVO2 compared with the preverapamil baseline state (P less than 0.05). We conclude that the MVO2 to LVPVA relationship in the in situ heart, within the never-opened thorax, conveys that the oxygen-wasting effect of catecholamines is quantifiable using the shift in this relationship.

HUBUNGAN KEPADATAN BIVALVIA DENGAN PARAMETER LINGKUNGAN DI PESISIR TANJUNG PURA KABUPATEN BANGKA TENGAH

2020 ◽  
Vol 13 (2) ◽  
pp. 112-121
Author(s):  
Sudiyar . ◽  
Okto Supratman ◽  
Indra Ambalika Syari
Keyword(s):  
Negative Impact ◽  
Principal Component ◽  
Environmental Parameters ◽  
Data Retrieval ◽  
Distribution Patterns ◽  
Random System ◽  
System Method ◽  
Relationship Of ◽  
The Relationship ◽  
Anadara Granosa

The destructive fishing feared will give a negative impact on the survival of this organism. This study aims to analyze the density of bivalves, distribution patterns, and to analyze the relationship of bivalves with environmental parameters in Tanjung Pura village. This research was conducted in March 2019. The systematic random system method was used for collecting data of bivalves. The collecting Data retrieval divided into five research stasions. The results obtained 6 types of bivalves from 3 families and the total is 115 individuals. The highest bivalve density is 4.56 ind / m², and the lowest bivalves are located at station 2,1.56 ind / m²,  The pattern of bivalve distribution in the Coastal of Tanjung Pura Village is grouping. The results of principal component analysis (PCA) showed that Anadara granosa species was positively correlated with TSS r = 0.890, Dosinia contusa, Anomalocardia squamosa, Mererix meretrix, Placamen isabellina, and Tellinella spengleri were positively correlated with currents r = 0.933.

Energy expenditure by elite midget male ice hockey players in small-sided games

2017 ◽  
Vol 12 (4) ◽  
pp. 504-513 ◽  
Author(s):  
Charles-Mathieu Lachaume ◽  
François Trudeau ◽  
Jean Lemoyne
Keyword(s):  
Heart Rate ◽  
Oxygen Consumption ◽  
Energy Expenditure ◽  
Ice Hockey ◽  
Training Method ◽  
Hockey Players ◽  
Treadmill Testing ◽  
Effective Training ◽  
Relationship Of ◽  
The Relationship

The purpose of this study was to investigate the energy expenditure and heart rate responses elicited in elite male midget ice hockey players during small-sided games. Nine players (aged 15.89 ± 0.33 years) participated in the study. Maximal progressive treadmill testing in the laboratory measured the relationship of oxygen consumption ([Formula: see text]) to heart rate before on-ice assessments of heart rate during six different small-sided games: 1v1, 2v2, 2v2 with support player, 3v3 with support player, 3v3 with transitions, and 4v4 with two support players. Heart rate was recorded continuously in each game. 3v3 T small-sided game was the most intense for all four intensity markers. All six small-sided games reached 89% HRmax or more with heart rate peaks in active effort repetition. These findings demonstrate that such small-sided games are considered as high intensity games and are an effective training method for ice hockey players.

Open innovation practices adopted by private stakeholders: perspectives for living labs

Info ◽  
2015 ◽  
Vol 17 (4) ◽  
pp. 67-80 ◽  
Author(s):  
Dominic Lapointe ◽  
David Guimont
Keyword(s):  
Open Innovation ◽  
Research Literature ◽  
Extensive Literature ◽  
Content Type ◽  
Living Lab ◽  
Living Labs ◽  
Innovation Practices ◽  
Relationship Of ◽  
The Relationship

Purpose – This paper aims to explore the role of private stakeholders in the living lab (LL) ecosystem and the relationship of private stakeholders to open innovation (OI) practices. There is extensive literature on private stakeholders and OI, but seldom mention is made on the specific question of how private stakeholders integrate OI in the context of a LL. Design/methodology/approach – The authors will analyze qualitatively how private businesses that have participated in a in situ open innovation evaluate and perceived their open innovation practices. Therefore, how they relate to open innovation. Then, the authors will identify a typology of the businesses in relation to OI. Findings – The research focused on the relationship of private stakeholders to OI in the context of in situ OI activities. The results obtained are consistent with literature on OI (Chesbrough, 2003). However, there are differences: if the elements mentioned by the respondents are described in literature, their representation of OI and its components allows us to affirm that this practice is not generalised and that it is often open to interpretation. That emphasises the importance of the role LLs can play as intermediaries to accompany private stakeholders in the OI process. Private stakeholders look for a guide to develop their OI know-how and find their way in the OI ecosystem. Originality/value – The value of this paper is to bridge the research on OI done with private organisation and the research on LLs. The research literature did not pay much attention to the representation of the private stakeholders in the OI ecosystem. This paper has provided the start to open up that field.

The Relationship of Infants' Physical Environment to Their Binet Performance at 21/2 Years

1978 ◽  
Vol 1 (1) ◽  
pp. 51-65 ◽  
Author(s):  
Theodore D. Wachs
Keyword(s):  
Physical Environment ◽  
Subsequent Development ◽  
Environmental Parameters ◽  
Interpersonal Interaction ◽  
Female Development ◽  
Interaction Variables ◽  
Second Year ◽  
Environment Parameters ◽  
Relationship Of ◽  
The Relationship

Most of the available evidence relating early experience to subsequent cognitive development has been concerned with interpersonal interaction variables. In the present paper the relationship of physical environment parameters to development was considered. Subjects were 23 infants who had previously taken part in a longitudinal project which included measurements of the child's physical environment between 12 and 24 months. These measurements were related to the infant's Binet performance at 31 months of age. Results indicated that some physical environment parameters including the presence of audio-visually responsive toys and a lack of overcrowding were related to subsequent Binet performance all across the second year of life. Other items were related to subsequent development only at certain time periods. A breakdown by sex suggested that female development was sensitive to environmental parameters at an earlier age than males and that females were uniquely sensitive to variety/change in their environment. Implications of these findings for early remediation were considered.

scholarly journals Mixed-Valence Cytoplasmic Iron Granules Are Linked to Anaerobic Respiration

2006 ◽  
Vol 73 (3) ◽  
pp. 993-996 ◽  
Author(s):  
S. Glasauer ◽  
S. Langley ◽  
M. Boyanov ◽  
B. Lai ◽  
K. Kemner ◽  
...  
Keyword(s):  
Ferrous Iron ◽  
Metal Particle ◽  
Ferric Iron ◽  
Solid Phase ◽  
Mixed Valence ◽  
Anaerobic Respiration ◽  
In Situ Detection ◽  
Relationship Of ◽  
The Relationship

ABSTRACT Intracellular granules containing ferric and ferrous iron formed in Shewanella putrefaciens CN32 during dissimilatory reduction of solid-phase ferric iron. It is the first in situ detection at high resolution (150 nm) of a mixed-valence metal particle residing within a prokaryotic cell. The relationship of the internal particles to Fe(III) reduction may indicate a respiratory role.

scholarly journals EFFECT OF BLASTING ON THE STABILITY OF LINING DURING EXCAVATION OF NEW TUNNEL NEAR THE EXISTING TUNNEL

2021 ◽  
Vol 30 (1) ◽  
Author(s):  
Tuan Minh Tran ◽  
Quang Huy Nguyen
Keyword(s):  
Field Data ◽  
Damage Zone ◽  
Field Tests ◽  
Surrounding Rock ◽  
In Situ Test ◽  
The Stability ◽  
Relationship Of ◽  
The Impact ◽  
The Relationship

In recent years, experimental and numerical researches on the effect of blasting pressure on the stability of existing tunnels was widely obtained. However, the effect of the blasting pressure during excavation a new tunnel or expansion old tunnels on an existing tunnel has disadvantages and still unclear. Some researches were carried out to study the relationship of the observed Peak Particle Velocity (PPV) on the lining areas along the existing tunnel direction, due to either the lack of in situ test data or the difficulty in conducting field tests, particularly for tunnels that are usually old and vulnerable after several decades of service. This paper introduces using numerical methods with the field data investigations on the effect of the blasting in a new tunnel on the surrounding rock mass and on the existing tunnel. The research results show that not only predicting the tunnel lining damage zone under the impact of blast loads but also determination peak maximum of explosion at the same time at the surface of tunnel working.

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