Wyniki wyszukiwania - Biblioteka Nauki

1

Effects of Carbon Dioxide Concentration on the Growth and Physiology of Albizia saman (Jacq.) Merr

100%

Fathurrahman F.

Journal of Ecological Engineering

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2023

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tom Vol. 24, nr 9

302--311

EN

This study was conducted to determine the effects of CO2 concentration on the growth and physiology of rain tree (Albizia saman (Jacq.) Merr), by increasing the CO2 concentration in a greenhouse automated system. The objective of this study was to evaluate the response of rain tree to CO2 in terms of growth and physiology. CO2 at an average concentration of 800 μmol mol-1 was injected daily for 2 h from 9 am to 11 am. The seedlings were placed in a greenhouse during the control trial with a mean ambient CO2 concentration of 400 μmol mol-1. In this study, the entire randomised block design has been applied, and growth was observed every 30 days for 120 days. Almost all seedling growth parameters were significant under elevated and ambient concentrations. The leaf area in the control samples (400 ppm of CO2) was 243.37 cm2, and this value increased to 277.30 cm2 in the sample treated with 800 ppm of CO2. The biomass increased, and the original wet weight ratio and root dry weight of the canopy and the principal (9.06 and 10.12 g, respectively) increased to 9.7 and 16.06 g, respectively, after treatment. Physiology was analysed in terms of relative levels of photosynthesis, stomatal conductance and water use efficiency (WUE). Such parameters increased in the principal treatment of CO2 (800 ppm), whilst the CO2 content and transpiration levels declined. As the CO2 concentration increased, the value of the levels of photosynthesis and stomatal conductance in both samples increased. As the photosynthesis levels increased, the WUE activity increased. However, as photosynthesis levels decreased, the WUE activity also decreased. Transpiration levels but also rely on a certain age if the increased photosynthesis WUE has decreased.

2

Anthropometric, Physiological and Performance Characteristics of Elite and Sub-elite Fencers

100%

Tsolakis C. , Vagenas G.

Journal of Human Kinetics

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2010

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tom 23

89-95

EN

The present study aimed at investigating the differences in selected anthropometric, strength-power parameters and functional characteristics of fencing performance between elite and sub-elite fencers. Thirty-three fencers (18 females and 15 males) from the Greek National Team, (age 19 ± 3.5 yr, body height 175.6 ± 7.6 cm, body mass 66.1 ± 9.1 kg, systematic training 8.4 ± 2.9 yr) were classified as elite and sub-elite, according to their international experience. Subjects underwent a detailed anthropometric assessment and performed selected leg power and fencing-specific tests. Significant differences were observed between the two groups in sitting height, triceps, subscapular, and quadriceps dominant skinfold thickness, absolute and body mass-dependent expressions of leg functional power characteristics of fencing performance: "time of lunge" and time of the "shuttle test". Anthropometric traits, such as height, body mass, percent fat and limb length were not different among elite and sub-elite fencers. Although technical and tactical factors are good indicators of fencing success, the observed differences in functional fencing performance tests among different levels of fencers are useful for the design of effective talent development and training-conditioning programs for competitive fencers.

3

The Morphological and Physiological Appearance of Two Vegetable Plants Due to Lead Exposure

88%

Lestari M. W. , Rosyidah A.

Journal of Ecological Engineering

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2022

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tom Vol. 23, nr 6

213--222

EN

This research aimed to determine the effect of different concentrations of Lead (Pb) on the morphology of kale and spinach plants. The process involved planting kale and spinach seeds in tubs and transferring them to polybags with planting media in the form of soil and sand at a ratio of 4:1 after strong roots were developed. It is important to note that the media were analyzed to ensure the Pb content in the soil was below the threshold before planting. Pb was later provided 1 week before planting in the form of PbNO3 in the media at a dose of 1 and 2 g/polybag and mixed effectively to ensure even distribution, while the sample used as the control was not given any Pb. The transplanting process was conducted after the plants were 18 days old in the nursery and the initial observations at 9 DAT showed that the kale leaves were darker with a score of 3 than spinach with a score of 1, but the spinach leaves became darker in color with score 3 as the age of the plants increased. Moreover, the kale changed to a lighter color with a score of 2 from the 9th day of observation after transplanting, while spinach requires 15 DAT to become score 2 until the end of the observation. It should be pointed out that both plants showed morphological changes due to the existence of the Pb but their base leaves did not reflect any effect. The kale leaf tip became blunt, while the spinach leaf tip was not affected and both plants were discovered to have longer roots and more root hairs in the control compared to the treatments. Furthermore, the total chlorophyll of spinach in the control was higher than kale but observed to reduce as the concentration of Pb increased in the treatments. The morphology and physiology of spinach and kale plants changed due to the Pb exposure with the spinach was discovered to be more sensitive as indicated by more visible morphological damage to its leaves at the end of the observation. It is possible to use the morphology of spinach and kale to detect Pb-contaminated land.

4

Physiological Adaptations to Training in Competitive Swimming: A Systematic Review

88%

Costa M. J. , Balasekaran G. , Vilas-Boas J. P. , Barbosa T. M.

Journal of Human Kinetics

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2015

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tom 49

|

nr 1

179-194

EN

The purpose of this systematic review was to summarize longitudinal studies on swimming physiology and get implications for daily practice. A computerized search of databases according to the PRISMA statement was employed. Studies were screened for eligibility on inclusion criteria: (i) present two testing points; (ii) on swimming physiology; (iii) using adult elite swimmers; (iv) no case-studies or with small sample sizes. Two independent reviewers used a checklist to assess the methodological quality of the studies. Thirty-four studies selected for analysis were gathered into five main categories: blood composition (n=7), endocrine secretion (n=11), muscle biochemistry (n=7), cardiovascular response (n=8) and the energetic profile (n=14). The mean quality index was 10.58 ± 2.19 points demonstrating an almost perfect agreement between reviewers (K = 0.93). It can be concluded that the mixed findings in the literature are due to the diversity of the experimental designs. Micro variables obtained at the cellular or molecular level are sensitive measures and demonstrate overtraining signs and health symptoms. The improvement of macro variables (i.e. main physiological systems) is limited and may depend on the athletes’ training background and experience.

5

Associations of Power at V̇O2peakand Anaerobic Threshold with Rank in British High Performance Junior Surfers

88%

Barlow M. J. , Gresty K. , Findlay M. , Cooke C.

Human Movement

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2015

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tom 16

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nr 1

28-32

EN

Purpose. The objective of this study was to determine the relationships of peak oxygen uptake ( V̇O2peak), power at V̇O2peak and power at the anaerobic threshold (AT) with national ranking in a sample of British high performance junior surfers. Methods. Eighteen male surfers (aged 15.4 ± 1.4 years) from the British Junior Surfing team were tested for V̇O2peak and AT using an adapted kayak ergometer; national ranking was used to indicate performance level. The AT was identified as the point at which V̇E/V̇O2 started to rise without a concomitant increase in V̇E/V̇CO2. Spearman’s rank (rs) and partial correlations (rp) controlling for age were used to identify the relationships between the physiological variables and national ranking. Results. Mean V̇O2peak was 3.1 ± 0.5 l · min-1 (47.7 ± 7.2 ml · kg-1 · min-1) and mean AT occurred at 48.1 ± 12.2 W. There were significant correlations between national ranking and power at V̇O2peak (rs = -0.549, p = 0.028), power at AT (rs = -0.646, p = 0.009), and age (rs = -0.579, p = 0.012). Significant partial correlations were established controlling for age between national ranking and power at V̇O2peak (rp = -0.839, p = 0.000) and power at AT (rp = -0.541, p < 0.046). Conclusions. The power outputs associated with V̇O2peak and AT were significantly related to surfer ranking in this sample. However, due to the low coefficient of determination associated with the AT/ranking relationship, AT does not discriminate well between the ranking of surfers. These findings support the inclusion of power at V̇O2peak in assessment batteries for junior competitive surfers.

6

Dynamic characteristics of intraperitoneal perfusion

88%

Sawicki J. , Sawicki S. , Wydra D. , Ciach K. , Emerich J.

Acta of Bioengineering and Biomechanics

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2003

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tom Vol. 5, nr 2

63-75

EN

Perfusion, i.e. the forced flow of a fluid through internal organs of a human body, is an interesting therapeutical method. It still has an experimental character. The paper is devoted to the laboratory investigations of hydromcchanical aspects of a physical model of a human peritoneum combined with a hydraulic system, which forces the flow of a liquid through the peritoneal cavity. Main goals of the research were formulated on general and detailed levels. The first one was oriented towards the technical possibility and practical sense of physical modelling of medical procedures, whereas on the second level main hydraulic parameters of the process were investigated. The results of the research presented in the paper give the positive answers to both groups of problems. The method of physical modelling of the considered kind of processes seems to be quite reasonable. It allows us to establish the location of the inlets and outlets from the peritoneum during perfusion.

7

Emotion monitoring – verification of physiological characteristics measurement procedures

88%

Landowska A.

Metrology and Measurement Systems

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2014

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tom Vol. 21, nr 4

719--732

EN

This paper concerns measurement procedures on an emotion monitoring stand designed for tracking human emotions in the Human-Computer Interaction with physiological characteristics. The paper addresses the key problem of physiological measurements being disturbed by a motion typical for human-computer interaction such as keyboard typing or mouse movements. An original experiment is described, that aimed at practical evaluation of measurement procedures performed at the emotion monitoring stand constructed at GUT. Different locations of sensors were considered and evaluated for suitability and measurement precision in the Human- Computer Interaction monitoring. Alternative locations (ear lobes and forearms) for skin conductance, blood volume pulse and temperature sensors were proposed and verified. Alternative locations proved correlation with traditional locations as well as lower sensitiveness to movements like typing or mouse moving, therefore they can make a better solution for monitoring the Human-Computer Interaction.

8

Comparative studies on O-acetylhomoserine sulfhydrylase: physiological role and characterization of the Aspergillus nidulans enzyme

88%

Brzywczy J. , Yamagata S. , Paszewski A.

Acta Biochimica Polonica

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1993

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tom 40

|

nr 3

XX

O-acetylhomoserine sulfhydrylase (OAH SHLase) from Aspergillus nidulans is an oligomeric protein with a broad substrate specificity with regard to sulfhydryl compounds. As its Saccharomyces cerevisiae counterpart the enzyme also reacts with O-acetylserine and is inhibited by carbonyl reagents but not by antiserum raised against the yeast enzyme. In contrast to Saccharomyces cerevisiae the enzyme is not essential for Aspergillus nidulans as indicated by the completely prototrophic phenotype of OAH SHLase-negative mutants. Its major physiological role in Aspergillus nidulans seems to be recycling of the thiomethyl group of methylthio- adenosine but it is also a constituent of the alternative pathway of cysteine synthesis.

9

Jedrzej Sniadecki [1768-1838] Chemist, physiologist, physician

88%

Zydowo M. M.

Polish Journal of Environmental Studies

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1996

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tom 05

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nr 4

10

Thérèse Raquin d’Émile Zola : la notion de tempérament entre l’héritage antique et l’apport de la physiologie du XIXe siècle

76%

Kaczmarek-Wiśniewska A.

Studia Romanica Posnaniensia

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2020

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tom 47

|

nr 4

91-100

EN

Therese Raquin, Zola’s first important work, is based on the modern version of the old physiological theory of “temperaments”, e.g. the combination of four cardinal “humours” that determine a man’s physical and mental constitution. Through the story of two murderers, an adulterous woman and her lover who kill the woman’s husband, the author shows the mutual influence of two temperaments considered in the 19th century as more important than all the others: sanguine and melancholic (or nervous). The novel intends to “verify” a theory dealing with the consequences of each type of temperament for people’s behaviour, their relationships and their internal life.

11

A Half Century of Scientific Research in Field Hockey

75%

Podgórski T. , Pawlak M.

Human Movement

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2011

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tom 12

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nr 2

108-123

EN

Purpose. Using databases available on the Internet, the number of scientific papers on the subject of field hockey were examined. Basic procedures. As a result, 208 scientific studies covering the fields of biochemistry, physiology, sport injuries, psychology and tactics were found, which were published within the last 50 years (from 1960 to 2010). Despite the popularity of field hockey and its status as an Olympic sport, the number of scientific studies which focused on field hockey was much smaller when compared to the amount of publications on other team sports, such as soccer, basketball, or baseball. Main findings. It was found that the greatest number of publications (61.06%) originated from five English-speaking countries (UK, USA, Canada, Australia, and New Zealand), with the majority focusing on sport psychology, injuries and biochemistry. What was discovered was that the vast majority of scientific studies used field hockey merely as a reference point in comparison to other team sports. Conclusions. The varying topic diversity of the scientific studies found among the databases significantly hinders an effective comparison of findings, especially considering that most of the studies focused on only a few selected aspects of the problem matter and were chiefly small sample studies, nor were they repeated.

12

Jedrzej Sniadecki 1768-1838

75%

Mietkiewski E.

Acta Physiologica Polonica

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1987

|

tom 38

|

nr 2

13

The past and the present of the Polish Physiological Society

75%

Guzek J. W.

Acta Physiologica Polonica

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1987

|

tom 38

|

nr 2

14

Bronislaw Zawadzki 1903-1957

75%

Krause M.

Acta Physiologica Polonica

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1987

|

tom 38

|

nr 3

15

Edward Stanislaw Czarnecki 1892-1970

75%

Mietkiewski E.

Acta Physiologica Polonica

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1987

|

tom 38

|

nr 3

16

Ophthalmic examination. It should not be expensive. It should not be complicated

75%

Ofri R.

Okulistyka Weterynaryjna. e-kwartalnik dla lekarzy i studentów weterynarii

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2014

|

nr 1

17

Morphological and physiological base of appetite regulation in the hypothalamus. A review

75%

Wojcik-Gladysz A.

Journal of Animal and Feed Sciences

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2004

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tom 13

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nr 2

239-255

18

Emotion Monitoring – Verification of Physiological Characteristics Measurement Procedures

75%

Landowska A.

|

nr 4

19

Wlodzimierz Jan Missiuro 1892-1967

75%

Markiewicz L.

Acta Physiologica Polonica

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1987

|

tom 38

|

nr 3

20

Temperature-dependent regulatory mechanism of larval development of the wax moth (Galleria mellonella).

75%

Cymborowski B.

Acta Biochimica Polonica

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2000

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tom 47

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nr 1

215-221

EN

The mechanisms underlying larval diapause in the wax moth (Galleria mellonella) is one of the most throughly studied aspects. At the low temperature of 18°C, the last instar larvae did not pupate but transferred to 30°C they initiated development and pupation in a circadian manner. Different types of surgical manipulations including head-ligation, nerve cord-severance, implantation of the brain, prothoracic glands, accompanied with ecdysteroid titre measurements indicated that diapausing arrest of larval development at 18°C might be due to the nervous inhibition of their prothoracic glands.