scholarly journals REGULARITIES OF LARVAE SURVIVAL OF Oestrus ovis L. IN THE HOST BODY

2020 ◽  
pp. 217-222
Author(s):  
Marchenko
Keyword(s):  
Environmental Factors ◽  
Reproductive Potential ◽  
Natural Resistance ◽  
Oestrus Ovis ◽  
Negative Effects ◽  
Host Body ◽  
Parasitic System ◽  
Spontaneous Infection

Experiments with artificial invasion of sheep by larvae (Oestrus ovis L.) and experiments with surgical replacing of older gadfly larvae were conducted. Survival of larvae upon infection of 40 specimens higher (22.5%) than with infection of 20 and 80 specimens (10 and 11.2%), respectively. High percentage of death of larvae of II and III ages (63.7 and 58.4%) was found in the experimental replacing of larvae. It was shown that the natural resistance of larvae to adverse environmental factors increases with increasing age of the larvae. The hypothesis of a self-regulating level of sheep gadfly abundance in the parasitic system is discussed. The optimum abundance, which is characterized by the maximum survival and abundance of the parasite and is within 40 specimens based on the result of spontaneous infection, is considered. This level of infection allows maintaining a high reproductive potential of the parasite with a minimum of negative effects on the host.

scholarly journals Influence of transport activity on environmental factors in Petroşani Basin

2020 ◽  
Vol 305 ◽  
pp. 00041
Author(s):  
Sorin Mihăilescu ◽  
Gabriel Praporgescu
Keyword(s):  
Sustainable Development ◽  
Environmental Factors ◽  
Carbon Dioxide Emissions ◽  
Road Traffic ◽  
Noise Pollution ◽  
Pollutant Emissions ◽  
Transport Activity ◽  
Negative Effects ◽  
Public Transport System ◽  
Development Plans

Economic development is closely linked to the mobility needs of communities. The main pillars supporting sustainable development are society, the environment and the economy, and the diagnosis of the current situation, the identification of solutions, the development plans and their implementation lead to sustainable development in terms of transport activity. As the Petroşani Basin has a high degree of urbanization, the negative effects of increased road traffic are particularly pronounced in the central areas of the cities. Of the environmental factors, air is the most obvious and most important factor in human health. Taking into account the national and European Community targets in terms of climate change mitigation, the reduction of air and noise pollution and greenhouse gas emissions is becoming a priority objective. Thus, by limiting the growth of road traffic and the adoption of strategic measures in the Petroşani Basin, a reduction in carbon dioxide emissions, nitrogen oxides and particulate matter levels will also be achieved. According to these trends, achieving a clean public transport system and sustainable (like electrical buses) and having infrastructure for the use of electric bicycles and trotters can do for sure reducing the pollutant emissions.

scholarly journals Pesticide Exposures Induce Male-Mediated Reproductive Toxicity: A Review

2017 ◽  
Vol 9 (13) ◽  
pp. 122
Author(s):  
Nur Afizah Yusoff ◽  
Siti Balkis Budin ◽  
Izatus Shima Taib
Keyword(s):  
Environmental Factors ◽  
Germ Line ◽  
Sperm Quality ◽  
Reproductive Toxicity ◽  
Adult Life ◽  
Negative Effects ◽  
Male Germ Line ◽  
Hormonal Function ◽  
Pesticide Exposures ◽  
Genetic And Environmental Factors

Infertility remains a continuing globally problem wherever couples worldwide were infertile as much as 42 million in 1990 and keep projecting to 48.5 million in 2010. Male-mediated infertility becomes one of the numerous concerns due to pesticide especially sperm quality as revealed with raising number of animal and human studies in latter-day among researchers. Pesticides have been used since the early days as pest control in agriculture, as vector controls in malaria and dengue as well as subject to much regulation. The reproductive system might be affected with some negative effects from pesticides that lead to interference with the male hormonal function. Polyunsaturated fatty acid (PUFA) content in the sperm cell membrane makes it become highly susceptible towards reactive oxygen species (ROS), thus leading to sperm damage. Besides known genetic and environmental factors, research during the last two decades has highlight on several mechanisms and their association with male infertility. The male germ line undergoes extensive epigenetic modifications throughout fetal to adult life hence vulnerable to environmental factors that may influence fertility. The present literature will help in understanding the mechanisms of pesticide in inducing male-mediated reproductive toxicity.

scholarly journals Light Intensity Modulates the Efficiency of Virus Seed Transmission through Modifications of Plant Tolerance

Plants ◽  
2019 ◽  
Vol 8 (9) ◽  
pp. 304 ◽  
Author(s):  
Nuria Montes ◽  
Israel Pagán
Keyword(s):  
Environmental Factors ◽  
Light Intensity ◽  
Mosaic Virus ◽  
Plant Virus ◽  
Reproductive Potential ◽  
Virus Transmission ◽  
Seed Transmission ◽  
Reproductive Organs ◽  
Virus Multiplication ◽  
Plant Tolerance

Increased light intensity has been predicted as a major consequence of climate change. Light intensity is a critical resource involved in many plant processes, including the interaction with viruses. A central question to plant–virus interactions is understanding the determinants of virus dispersal among plants. However, very little is known on the effect of environmental factors on virus transmission, particularly through seeds. The fitness of seed-transmitted viruses is highly dependent on host reproductive potential, and requires higher virus multiplication in reproductive organs. Thus, environmental conditions that favor reduced virus virulence without controlling its level of within-plant multiplication (i.e., tolerance) may enhance seed transmission. We tested the hypothesis that light intensity conditions that enhance plant tolerance promote virus seed transmission. To do so, we challenged 18 Arabidopsis thaliana accessions with Turnip mosaic virus (TuMV) and Cucumber mosaic virus (CMV) under high and low light intensity. Results indicated that higher light intensity increased TuMV multiplication and/or plant tolerance, which was associated with more efficient seed transmission. Conversely, higher light intensity reduced plant tolerance and CMV multiplication, and had no effect on seed transmission. This work provides novel insights on how environmental factors modulate plant virus transmission and contributes to understand the underlying processes.

scholarly journals THE EFFECTS OF STEM BLEEDING DISEASE ON THE FLOWERING AND FRUIT SETTING OF COCONUT HYBRID PB 121

CORD ◽  
1986 ◽  
Vol 2 (02) ◽  
pp. 34
Author(s):  
J. Brahmana
Keyword(s):  
Environmental Factors ◽  
Mechanical Damage ◽  
Stem Tissue ◽  
Negative Effects ◽  
Coconut Tree ◽  
Common Diseases ◽  
Fruit Setting ◽  
The Common ◽  
Severity Of The Disease ◽  
North Sumatra

Stem bleeding is one the common diseases of coconut in Indonesia. The severity of the disease varies considerably depend­ing on the cultivars, environmental. factors, and the occurence of mechanical. damage on the stem.   Observation on the coconut hybrid PB 121 in the Bangun Purba estate PTP VI North Sumatra indicated that stem bleeding disease caused‑necrosis in the stem tissue but it did not kill the tree. Moreover, this disease had no negative effects in the flowering, fruiting and inflorescence formation of the coconut tree.

scholarly journals IT Project Governance and Stakeholder Conflict Resolution

2021 ◽  
Author(s):  
◽  
David Johnstone
Keyword(s):  
Conflict Resolution ◽  
Environmental Factors ◽  
Research Method ◽  
Negative Effects ◽  
It Projects ◽  
Systems Perspective ◽  
Project Governance ◽  
Stakeholder Conflict ◽  
It Project ◽  
History Play

<p>IT projects have long been problematic, particularly as they have grown in size and complexity, frequently integrating several organisational functions, and often involving many stakeholders as a result. A common problem with large, complex IT projects is stakeholder conflict. Unless conflict is resolved effectively, there is a risk that the project will suffer delays and struggle to make progress. The purpose of this study is to investigate the role that environmental factors, such as culture, power, and history, play in conflict resolution. This study also examines how IT project governance can moderate the negative effects of environmental factors, and facilitate more successful conflict resolution. A systems perspective is used to represent the research framework. A positivist, qualitative research method using three case studies is used to examine the nature of conflict resolution in IT projects, comparing and contrasting outcomes. IT project governance arrangements (policies, authority structures and mechanisms) are found to be critical to the way stakeholder conflict is resolved</p>

scholarly journals Техническое решение для обеспечения оптимальной влажности воздуха в животноводческом помещении

2021 ◽  
Vol 70 (2) ◽  
pp. 100-103
Author(s):  
C.И. Иванов ◽  
В.А Шилин ◽  
П.С. Овсепян
Keyword(s):  
Relative Humidity ◽  
Environmental Factors ◽  
Service Life ◽  
Animal Husbandry ◽  
Natural Resistance ◽  
Air Velocity ◽  
Technological Design ◽  
Genetic Potential ◽  
Livestock Buildings

The article describes the relevance of the development and use of air dehumidification systems in animal husbandry premises, the installation for maintaining the optimal relative humidity of the air is developed. Optimum microclimate in livestock buildings contributes to a more complete realization of the genetic potential of animals and birds, prevent disease, increase natural resistance and prolong the service life of buildings and installed equipment. Ensuring an optimal indoor microclimate is achieved by observing the scientifically based values of the environmental factors that form it (temperature, humidity, air velocity, etc.), which are generalized and given for each type of animal in the relevant standards of technological design of livestock enterprises.

Environmental factors as indicators characterizing the reproductive potential of the population in the region

2019 ◽  
Vol 25 (5) ◽  
pp. 49
Author(s):  
V. G. Kudrina ◽  
N. V. Suslonova ◽  
A. V. Samoylova ◽  
T. L. Smirnova ◽  
M. O. Basov ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Reproductive Potential

scholarly journals Incorporating HIV/AIDS Considerations into Vulnerability Assessments for Disaster Risk Reduction

2006 ◽  
Vol 1 (1) ◽  
Author(s):  
Gideon Van Riet
Keyword(s):  
Environmental Factors ◽  
Disaster Risk Reduction ◽  
Humanitarian Aid ◽  
Disaster Risk ◽  
Negative Effects ◽  
Paper Briefly ◽  
Vulnerability Assessments ◽  
Political Economic ◽  
Focus Point ◽  
Hiv Aids

The paper briefly highlights the link between HIV/AIDS and vulnerability, the latter being a focus point of DRR. In particular it investigates in which ways HIV/AIDS contributes to the vulnerability (for the purposes of this discussion defined as the susceptibility of households to the negative effects of certain natural hazards, brought on by the interplay between various political, economic, social and environmental factors) of households. Secondly, the paper investigates the possible measurement of HIV/AIDS in general vulnerability assessments used for the purposes of DRR, by evaluating the merit of certain indicators often used to target humanitarian aid.

Environmental factors affecting anchovy reproductive potential in the southern coastal waters of Korea

2013 ◽  
Vol 17 (2) ◽  
pp. 133-140 ◽  
Author(s):  
Jin Yeong Kim ◽  
Sun Kil Lee ◽  
Sang Su Kim ◽  
Mun Seong Choi
Keyword(s):  
Environmental Factors ◽  
Coastal Waters ◽  
Reproductive Potential ◽  
Factors Affecting
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