scholarly journals Features of the Organisation of Rooting Cuttings of Decorative Woody Plants Under Artificial Lighting with Led Equipment

2021 ◽  
Vol 9 (4) ◽  
pp. 149-158
Author(s):  
Andrei M. Piatykh ◽  
Mikhail A. Emelianov ◽  
Aleksandr V. Akinchin ◽  
Ivan V. Partolin ◽  
Alla A. Belyaeva
Keyword(s):  
Woody Plants ◽  
Spectral Composition ◽  
Green Building ◽  
Dynamic Regulation ◽  
Led Lighting ◽  
Artificial Lighting ◽  
Batch Type ◽  
Planting Material ◽  
Lighting Conditions ◽  
Slow Growing

Obtaining a technology for rooting cuttings and standard seedlings of decorative woody plants under artificial lighting conditions is relevant in connection with the need to increase the amount of planting material required for green building. Currently, cuttings are carried out mainly in greenhouses during the growing season. The development of technology for rooting cuttings using lamps with different lighting parameters opens up the possibility of creating installations that are effective in various conditions. In the course of the study, organisational and technological measures were taken to modernise the greenhouse and install equipment for growing planting material of decorative plants. In accordance with the plan to study the characteristics of various crops using the technology of dynamic regulation of the spectral composition and temporal characteristics of LED lighting in a greenhouse, an assortment of decorative tree species has been developed. Heated greenhouses are equipped with automatic irrigation hotbeds. Cutting of coniferous, deciduous, fast- and slow-growing species of decorative woody plants (7 species and 3 cultivars in total) was carried out. Rooting was carried out under illumination with batch-type LED installations. The success of rooting is studied when using LEDs of various production, with different spectral composition and varying illumination intensity during year-round cultivation. The findings are necessary not only for the development of a regional technology for the year-round production of rooted cuttings of decorative woody plants, but also for the development of the engineering specifics of lighting equipment.

Errors of In Situ Illuminance Measurements

2016 ◽  
Vol 824 ◽  
pp. 676-683
Author(s):  
Michaela Hlásková ◽  
Lenka Gábrová ◽  
František Vajkay
Keyword(s):  
Measurement Errors ◽  
Daily Basis ◽  
Lighting Design ◽  
Public Health Authority ◽  
Construction Work ◽  
Measurement Instruments ◽  
Artificial Lighting ◽  
Lighting Conditions ◽  
Overcast Sky

Lighting conditions in buildings are verified by experts on a daily basis. Such verifications may be done at several phases in various ways. In the field of daylighting, it is common to make an assessment within the pre-design and in-design phases of a construction work throughout calculations, only rarely by measurements. This approach is the opposite of artificial lighting design, which is done within the in-design phase by calculations and is verified by measurements in post-realization phase. The verification of artificial lighting design is required by the building and public health authority otherwise buildings cannot be approved to use. In the field of daylighting, measurements could be performed as well, nevertheless those are often problematic because regulations usually require fulfilments of the daylight factor which can be determined only under CIE overcast sky. Howbeit, both artificial lighting and daylighting measurements are influenced by many errors, e.g. errors of light measurement instruments, measurement conditions, measurement methods and human factor. The paper is focused on this aspect of lighting design, more specifically on the daylighting measurement errors.

scholarly journals Green Building Occupant Satisfaction: Evidence from the Australian Higher Education Sector

2018 ◽  
Vol 10 (8) ◽  
pp. 2890 ◽  
Author(s):  
Maryam Khoshbakht ◽  
Zhonghua Gou ◽  
Xiaohuan Xie ◽  
Baojie He ◽  
Amos Darko
Keyword(s):  
Environmental Control ◽  
Green Building ◽  
Building Design ◽  
Green Buildings ◽  
Facilities Management ◽  
Subtropical Climate ◽  
Indoor Environmental Quality ◽  
Artificial Lighting ◽  
The Individual ◽  
Occupant Satisfaction

Universities spend billions of dollars on green buildings as a sustainability commitment. This research investigates occupant satisfaction with indoor environmental quality (IEQ), building design (BD), and facilities management (FM) in five highly ranked green higher educational buildings in the subtropical climate of Australia, in comparison to nine non-green counterparts. The results disclose that the green building users were more consistently satisfied than the non-green building users with BD&FM elements, such as design, needs from facilities, building image, cleaning, the availability of meeting rooms, and storage. On the other hand, the study revealed weaknesses of green buildings in IEQ, such as noise, ventilation, and artificial lighting. The individual environmental control positively correlated with satisfaction in non-green buildings, but did not significantly affect satisfaction in green buildings. This study also identified the influences of non-environmental factors on occupant satisfaction, such as gender, age, sitting close to a window, hours spent in the building and in the workstation, and the number of people sharing office space. The research provides evidence and guidance for investing in, designing, and managing green educational facilities.

scholarly journals Analysis of variability of quantitave traits of Vaccinium corymbosum L. ex vitro under different lighting modes

2019 ◽  
pp. 22-28
Author(s):  
Marta P. Fedorenko ◽  
Anton A. Volotovich ◽  
Oksana A. Kudryashova
Keyword(s):  
Comparative Analysis ◽  
Plant Growth ◽  
Growth Parameters ◽  
Spectral Composition ◽  
Vaccinium Corymbosum ◽  
Ex Vitro ◽  
Led Lighting ◽  
Led Light

The article presents the results of studies on the comparative analysis of bioproductional parameters of plant growth of Bluecrop and Elizabeth high-bush blueberry ex vitro under the conditions of fluorescent and LED lighting. Ensuring the optimal spectral composition of radiation, realized with the original LED light, led to a significant increase at 1.1–1.6 times in all of the analyzed growth parameters in high-bush blueberry ex vitro plants.

scholarly journals Influence of Anthropogenic Factors on the State of Woody Plants in Volgograd

2021 ◽  
pp. 5-11
Author(s):  
Tatyana Tereshchenko ◽  
Galina Sroslova ◽  
Margarita Postnova ◽  
Yuliya Zimina ◽  
Mikhail Sroslov
Keyword(s):  
Woody Plants ◽  
Chemical Elements ◽  
Green Building ◽  
The State ◽  
Young Age ◽  
Solid Particles ◽  
Anthropogenic Factors ◽  
Horse Chestnut ◽  
Negative Factors ◽  
The City

Studies conducted in different cities have shown that trees growing in urbanized areas reduce noise levels and cleanse the air of solid particles, ozone, sulfur dioxide, carbon monoxide, nitric oxide and other pollutants contained in car fumes, transport dust and generated by industry. The reaction to the influence of negative factors in woody plants is in disturbances in metabolism and biochemical composition, their general development also changes, and their population decreases. The indicators of disorders occurring at the cellular and tissue levels are more sensitive to the influence of negative anthropogenic factors in comparison with external manifestations. The research was carried out on woody plants: small-leaved linden (L. Tíliacordáta), horse chestnut (L. Aésculus); the soil. The research was carried out in 9 districts of Volgograd. The assessment of the state of woody plants was carried out by the visual method based on external signs. GOST methods were used to determine the concentrations of chemical elements in the foliage and soil of woody plants. Using physical and chemical methods, the concentrations of chemical elements in the soil and biomass of woody plants taken from the selected areas of the city of Volgograd were obtained, and the correlation between these indicators and the life state of woody plants was determined. The dependence of the indicators of the concentration of nutrients in the soil and the state and viability of woody plants was well traced. In general, the state of most of the woody plants of the city was healthy or moderately weakened. Such a high level of the life state is explained by the relatively young age structure of the studied plants, because at a young age woody plants are more resistant to negative factors of the urban environment. The revealed features of the life of woody plants in the city can be taken into account in the practice of city green building.

scholarly journals Aberrant Lighting Causes Anxiety-like Behavior in Mice but Curcumin Ameliorates the Symptoms

Animals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2590
Author(s):  
Dhondup Namgyal ◽  
Kumari Chandan ◽  
Sher Ali ◽  
Ajaz Ahmad ◽  
Maha J. Hashim ◽  
...  
Keyword(s):  
Body Weight ◽  
Research Field ◽  
The Body ◽  
Laboratory Animals ◽  
Artificial Lighting ◽  
Lighting Conditions ◽  
Daily Food ◽  
Significant Difference ◽  
Negative Effect ◽  
Lighting Systems

In the modern research field, laboratory animals are constantly kept under artificial lighting conditions. However, recent studies have shown the effect of artificial light on animal behavior and metabolism. In the present study on mice, following three weeks of housing in dim light at night (dLAN; 5lux) and complete darkness (DD; 0lux), we monitored the effect on body weight, daily food intake, anxiety-like behavior by employing the open field test, and expression of the period (PER1) gene. We also studied the effect of oral administration of different concentrations of curcumin (50, 100, and 150 mg/kg) for three weeks in the same mice and monitored these parameters. The exposure to dLAN had significantly increased the anxiety-like behavior and body weight possibly through the altered metabolism in mice, whereas exposure to DD caused increased anxiety but no significant difference in weight gain. Moreover, the expression of the PER1 gene involved in sleep was also found to be decreased in the aberrant light conditions (dLAN and DD). Although the treatment of curcumin had no effect on body weight, it ameliorated the anxiety-like behavior possibly by modulating the expression of the PER1 gene. Thus, alteration in the light/dark cycle had a negative effect on laboratory animals on the body weight and emotions of animals. The present study identifies the risk factors associated with artificial lighting systems on the behavior of laboratory animals and the ameliorative effects of curcumin, with a focus on anxiety-like behavior.

Xylophilus ampelinus (canker of grapevine).

2021 ◽  
Author(s):  
Tanja Dreo
Keyword(s):  
Vitis Vinifera ◽  
Causative Agent ◽  
Bacterial Blight ◽  
Host Plants ◽  
Surrounding Area ◽  
Planting Material ◽  
Xylophilus Ampelinus ◽  
Slow Growing ◽  
Natural Dispersal

Abstract The causative agent of bacterial blight of grapevine, X. ampelinus, is a slow-growing bacterium. It is thought that only European grapevines (Vitis vinifera) are susceptible (Panagopoulos, 1988b). Natural dispersal from infected plants is limited to the vineyard and the immediately surrounding area and is mostly associated with pruning. Dispersal over large distances is expected to occur only associated with host plants, most likely during trading of planting material. It is difficult to control as outbreaks are sporadic and infections are often latent thus hindering detection.

scholarly journals Effect of LED Lighting Illuminance and Correlated Color Temperature on Working Memory

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Chung Won Lee ◽  
Jin Ho Kim
Keyword(s):  
Working Memory ◽  
Standard Deviation ◽  
Repeated Measures ◽  
Memory Performance ◽  
Light Condition ◽  
Bright Light ◽  
Color Temperature ◽  
Led Lighting ◽  
Temperature Conditions ◽  
Lighting Conditions

This study was conducted to verify how the illuminance and correlated color temperature of LED lighting affect working memory. For this study, an automatic LED lighting device based on a light sensor was developed and used, and the lighting conditions were treated with a total of six conditions (2 × 3): two illuminance conditions (dim: 400 lx, bright: 1,000 lx) and three correlated color temperature conditions (3,000 K, 5,000 K, and 7,000 K). There were 30 participants in the study, and the average age was 21.6 years (Standard deviation = 1.92). Participants were assigned to all six lighting conditions, and the placement order was randomized. For the measurement of working memory, 3-back task was used and the correct responses for 5 minutes were used as a dependent variable. As a result of repeated measures analysis of variance (ANOVA), both illuminance and correlated color temperature were found to be significant variables affecting working memory, and no interaction effect between illuminance and correlated color temperature was found. As a result of the post hoc verification conducted thereafter, the working memory performance in the bright light condition (1,000 lx) was 48.32 (Standard deviation = 15.63) on average, compared to 44.80 (Standard deviation = 15.29) in the relatively dim condition (400 lx). It was found that the condition of bright light was superior in performing working memory compared to relatively dim condition. The working memory performance in the correlated color temperature condition (5,000 K) was 48.32 (Standard deviation = 16.41) on average and higher than that of other color temperature conditions. As a result, working memory performance was the best in 1,000 lx, 5,000 K condition Mean = 53.43 (Standard deviation = 18.38), and 400 lx, 7,000 K condition Mean = 42.73 (Standard deviation = 17.68) showed the worst performance of working memory.

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