Different Types Of Light Research Articles

Degradation of citrinin by different types of light and hydrogen peroxide.

Citrinin (CIT), a mycotoxin produced by Monascus, Penicillium, and other fungies, can contaminate red yeast rice and other foods, thus constraining their application and development. Exploring efficient degradation methods of citrinin is becoming as one of the hot research topics. In this study, the degradation of citrinin, irradiated by visible (Vis) light, ultraviolet (UV) light, and simulated sunlight alone, as well as in combination with hydrogen peroxide (light/H2O2), was investigated. The research demonstrates UV, Vis, and simulated sunlight all have a degree of degradation on citrinin, and the degradation efficiency correlates with light source and light intensity. Interestingly, when combined with 100W Vis and 0.01M H2O2, the citrinin degradation rate increases to 32%, compared to 1% and 5% achieved by Vis and H2O2 alone. Hydroxyl radicals, arising from the uniform cracking of H2O2 under Vis, were experimentally validated by electron spin resonance measurement and could accelerate the dissociation of citrinin by nucleophilic attacking. Employing the density functional theory, we deduced nucleophilic •OH mainly attack onto C8 and C5 site by comparing the electrophilic Parr functions (Pk+) value of main C atom of citrinin. This research presents a rapid and efficient degradation of citrinin by combining visible light with H2O2. PRACTICAL APPLICATION: This research presents a rapid and efficient method for the degradation of citrnin in red yeast rice and other citrnin containing products by combining visible light with H2O2.

EFFECT OF SUPPLEMENTARY LIGHT ON GROWTH, FLOWERING AND CUT FLOWER QUALITY IN TWO CULTIVAR OF CARNATION PLANT

This study was conducted to investigate the effects of different types of light and some factors on some vegetative growth and flowering of two cultivars of carnation plant (Dianthus caryophyllus L.). The results showed the maximum leaves number, leaf area per plant, internodes number and intermodal length were recorded under 14h incandescent (41.09 leaves/plant, 363.91 cm2, 18.70 node/plant, and 7.675 cm) respectively, and the increase was significant. While the effect of triple interaction, which showed a significant effect in all characteristics, the largest leaf area per plant (578.66 cm2) was obtained from the moonlight cultivar when cultured on the media containing 60% local compost and exposed to the 14h incandescent, Also, the maximum vase life was found in the Ormea cultivar (17.47 days) when the cultivar was exposed to the 14h incandescent and was cultured on medium that included 60% local compost. The best grade flower was obtained when the Ormea cultivar was cultured on a medium containing 30% and 60% local compost under 14 hours of incandescent light, reaching 3.89.

HARMONY OF LIGHT AND SHADOW: KEY ASPECTS OF LIGHTING IN PORTRAIT PHOTOGRAPHY

The article analyzes the role of lighting in portrait photography, emphasizing how the harmony between light and shadow can affect the emotional depth and visual appeal of an image. Photography, presented as an art and science of light, requires not only professional skills, but also the talent and skill of the photographer. The skill of a photographer lies not only in technical execution, but also in the ability to convey life and emotions through the image, revealing the true character of a person. Thus, a portrait photographer should be able to capture the soul and inner world of the model, which is a sign of his or her true skill. The article pays special attention to lighting under artificial lighting. It further discusses such aspects as distance between the subject and the light source, directionality of light, the size of light source and the distance to the subject, as well as the importance of shape of reflector. The different types of lighting in portrait photography are also discussed: back, side, front, diffused, and hard light, each of which affects the final image. The study includes analysis of current trends and innovative lighting techniques in portrait photography. It emphasizes the importance of the photographer’s ability to use different light sources to create images that reflect uniqueness and personality of the model. This study aims to expand the theoretical knowledge and practical skills of photographers, striving to improve the quality and expressiveness of portrait images.

The Research on interlaboratory comparison test of LED lighting products

The article introduces the Interlaboratory Comparison (IC) test for three different types of light emitting diode (LED) lamps measurement about the key photometric, colorimetric, and electrical parameters. The article analyses the deviations of the test results between the reference values and test results from six participating laboratories. It found that the photometric and colorimetric parameters showed high deviations between the reference values and participating laboratories’ test results. The recommended participating laboratory improvement measures in the article are as follows: checking the traceability of standard artefacts, checking data correction, improving test procedures, checking ambient temperature, checking calculation software, and checking the response of the photodetector, etc.

Effect of daily light exposure on sleep in polar regions: A meta-analysis.

Although studies have shown that light affects sleep in polar populations, the sample size of most studies is small. This meta-analysis provides the first systematic review of the effects of summer glare, spring and fall moderate daylight, and artificial lighting on general sleep problems (sleep duration, efficiency, and delay). This analysis included 18 studies involving 986 participants. We calculated the random effect size via an evidence-based meta-analysis that analysed the effect of bright/auxiliary light on sleep and the effect of three different types of light on sleep compared with conventional light. There was no significant correlation between specific light types and sleep duration. Intense summer light has a negative effect on sleep time and efficiency. Moderate, natural light in spring and autumn effectively delayed sleep but could not improve sleep efficiency. For artificial fill light, neither blue light nor enhanced white light has been found to have a significant effect. In summary, summer light has a detrimental effect on sleep in polar populations, and moderate natural light may be superior to conventional light. However, specific strategies to improve sleep and artificial lighting in polar populations must be explored further.

Behavior Patterns of Betch Fish (Betta sp.) Towards Different Lamp Light Colors

Betta fish (Betta sp.) is a type of ornamental fish that has unique characteristics compared to other ornamental fish. This research was carried out in November 2023 with the aim of finding out the behavioral patterns of Betta fish when exposed to different types of light. This research used a quantitative method with a (RAL). The results of the research showed that there were changes in behavior in Betta fish (Betta sp.) that had been given different colored lights. The reason why fish are attracted to light is, among other things, because fish have positive phototaxis properties which cause fish to be stimulated and attracted to gather at light sources. In this research, it can be seen that the movement of betta fish moves away from the light source, because the light coming out of the lamp will become hot if it is turned on for too long. If this goes on for a long time, it is feared that the fish will become bored and also experience stress.

Genome-wide characterization of regulator of chromosome condensation 1 (RCC1) gene family in Artemisia annua L. revealed a conservation evolutionary pattern

BackgroundArtemisia annua is the major source for artemisinin production. The artemisinin content in A. annua is affected by different types of light especially the UV light. UVR8, a member of RCC1 gene family was found to be the UV-B receptor in plants. The gene structures, evolutionary history and expression profile of UVR8 or RCC1 genes remain undiscovered in A. annua.ResultsTwenty-two RCC1 genes (AaRCC1) were identified in each haplotype genome of two diploid strains of A. annua, LQ-9 and HAN1. Varied gene structures and sequences among paralogs were observed. The divergence of most RCC1 genes occurred at 46.7 – 51 MYA which overlapped with species divergence of core Asteraceae during the Eocene, while no recent novel RCC1 members were found in A. annua genome. The number of RCC1 genes remained stable among eudicots and RCC1 genes underwent purifying selection. The expression profile of AaRCC1 is analogous to that of Arabidopsis thaliana (AtRCC1) when responding to environmental stress.ConclusionsThis study provided a comprehensive characterization of the AaRCC1 gene family and suggested that RCC1 genes were conserved in gene number, structures, constitution of amino acids and expression profiles among eudicots.

Peculiarities of Using Lighting in the Process of Film Shooting

The purpose of the article. It analyzes the components that influence the creation of movie images. Set the role of lighting in the shooting of an audiovisual product. Identify features and fragments when working with it. Prove the importance of the ability to use light sources in natural and pavilion locations. Identify the factors that affect the quality of the visual material. Research methodology. Such methods were used in the article: theoretical – analysis of movies, and publications; generalization – the influence of lighting on the quality of visual material; determination of interdependence (light, time of day and auxiliary objects that influence the creation of a frame); empirical – systematization of one’s own experience, determination of the relationship between lighting and the quality of visual material. Scientific novelty. The components that influence the creation of a visual image were analyzed for the first time, a detailed analysis of the dependence of the time of day and illumination in the field, which forms the illumination scheme, by means of theoretical analysis of films, the factors that influence the quality of the visual material are determined. Conclusions. In the course of the article, the main techniques of cinematography when creating audiovisual works are analyzed. The concepts of frame composition and the skill of conveying an emotional state are considered. The use of various lighting sources in natural and artificial locations is considered in detail. Based on the analysis of audiovisual products of leading masters, the importance of the ability to use different types of lighting sources has been proven. A list of the features and difficulties of using different types of lighting has been created and the key factors that have a direct impact on the quality of creating an audiovisual work have been outlined.

Identification of Greenish Soybean Seeds through Image Processing, under Different Types of Lighting

A high occurrence of greenish soybean seeds in crops is an issue, these types of seeds have low physiological quality, which can generate seedlings with anomalies, if destined for processing in industries, the presence of chlorophyll is undesirable, requiring additional processes for its removal. This work aimed to evaluate the differentiation of mature and greenish soybean seeds, illuminated with red laser, green laser, red LED, and fluorescent lamp, using image processing. Images of mature and greenish soybean seeds were captured at a resolution of 340x480 pixels, illuminated with red laser, green laser, red LED, and fluorescent lamp. Subsequently, the averages of the gray levels of each image were obtained in the red, green, blue channels and in images converted to grayscale 8-bit. The data were submitted to tests of variance after gray level for image classification. And a validation presented results of 97% of hits for red laser, 94% for fluorescent light and 93.5% for red LED, all in red channel. Keywords: seed classification, agricultural automation, soybean seed quality, computer vision

Response of Anguilla bicolor Glass Eel to Different Light Colors

The response of eel fish (Anguilla bicolor) glass eel stadia to different light is fundamental knowledge for developing fishing methods and conserving fish resources. The study aimed to describe how glass eel fish react to different types of light. In the laboratory, glass eels were observed responding to red, blue, and white LED light versus no light as controls. Glass eels ranging in size from 4.0 to 6.1 cm and weighing up to 0.28 g were caught in the Pelabuhanratu estuary of the Cimandiri River. Observations were made for 31 days, beginning five days after the glass eel was captured. The Mann Whitney and Kruskal-Wallis tests were used to describe differences of the glass eel's response to light. Observations showed that glass eels responded more to dark zones with values above 80% when compared to zones given red, blue, and white LED light. The percentage of fish in red LED lights was 23±0.22% higher, with the number of fish on blue LED lights by 10±0.21% and white LED lights 8±0.15% (p<0.05, Kruskal-Wallis). The difference in response to light can be used for glass eel catching applications, especially lamps for eel fish aids and eel conservation to create fishing zones and eels.Keywords: Anguilla bicolor, eel behavior, glass eel, LED light, response to light

Biofertilizer and lighting as factors affecting tomato growth, development and biochemical composition

A comprehensive study of growth and biochemical composition of the Blagodatny variety tomato plants grown with the use of bacterial spores Bacillus cereus strain 96 under continuous LED lighting based on full spectrum photons in the proportion B: G: R: FR ~ 17: 23: 43: 17 was conducted. Plants grown with high-pressure sodium lamps (HPS) without bacterial culture action were used as controls. A number of parameters reflecting plant growth and quality of tomato fruits were studied - the content of photosynthetic pigments, dry matter and organic acids. It was shown that during the growing season, tomato plants grown under LED illumination had a longer shoot length compared to the plants in the sodium variant. The action of the bacteria manifested itself during fruit ripening with significant differences under both sodium and LED lighting. The effect of dry matter under the influence of bacteria on the plants grown with sodium lighting did not differ from the control variant. The observed differences became more pronounced and reliably significant in the plants under LED lighting. Application of B. cereus bacterial culture increased the concentration of chlorophylls a, b and carotenoids compared to the control. When evaluating the effect of different types of lighting and the use of B. cereus bacteria on the accumulation of organic acids in fruits, it was found that LED lighting had a better effect on the synthesis of organic acids. Tomato plants treated with B. cereus were distinguished by the formation of fruits with a high content of succinic, malic and citric acids with a sodium type of lighting. When analyzing the fruits of tomato plants grown under LED lighting, a change in the accumulation of only succinic acid was noted. The use of different lighting sources and biofertilizers caused changes in the development of tomato plants under climate chamber conditions.

Effect of Different Types of Lights on Growth, Yield and Quality of Kale (Brassica oleracea var. Acephala)

A research project was conducted to investigate the impact of different types of lighting on the growth, yield, and quality of Kale (Brassica oleracea var Acephala), under the Prayagraj Agro Climatic conditions. The experiment comprised of treatments T0 (Outdoor under sunlight), T1 (LED bulb white), T2 (LED tube white), T3 (General bulb), T4 (LED bulb full spectrum), T5 (LED white bulb + LED bulb full spectrum), T6 (LED tube white + LED bulb full spectrum), T7 (General bulb + LED bulb full spectrum), T8 (LED bulb full spectrum). To the study's findings, among the various treatment levels, treatment T2(LED tube white) showed the highest values in growth parameters such as plant height (30.01 cm), petiole length (15.07 cm), and number of leaves per plant (14.33 leaves). It also demonstrated the highest yield parameters, fresh weight of leaves (24.40 gms), leaves yield/bag (50.54 g). Additionally, T2 exhibited better quality parameters such as total soluble solids (3.23 °Brix), shelf-life (4.67 days), and chlorophyll content (56.40 nmol cm2), while the lowest values were observed in T4 (LED Full spectrum).

Growth and yield pattern of microgreen under different types of artificial lighting

Microgreen is a popular food product that is interesting to study and can be produced in the building with the support of artificial light, especially in terms of smart lights. This study aims to analyze the growth and yield response of red amaranth, red radish, and coriander microgreens under different types of light color treatment from smart lights. The study was conducted in August 2022 at the microgreen culture room, Department of Agronomy, Universitas Padjadjaran, Indonesia, using a completely randomized design with two factors, namely three levels of plant species and five levels of smart light color. The results showed differences in seed viability, first-day count, and the day the cotyledons were open among three microgreen species. Seed growth into microgreens had the same pattern, namely linear and positive, even in the light absence condition as the evidence of etiolation occurrence leading to the production of thin and yellow pale color of microgreens. The difference in light color is specific to each type of plant. Red radishes thrived in all colors, although red light tended to do better. On the other hand, red amaranth was inhibited in red light and coriander in white light. Blue light is strongly recommended for increasing red amaranth and coriander microgreens yields.

Germinating seedlings and mature shoots of Cuscuta campestris respond differently to light stimuli during parasitism but not during circumnutation.

Seedlings of the parasitic plant genus Cuscuta (dodder) locate hosts by circumnutation, coil around the host near soil level and form a haustorium, establishing a primary parasitism beneath the canopy. Mature shoots elongating from the parasitic region parasitize other hosts on the upper surfaces of their canopy. Although parasitism by dodder is stimulated by blue and far-red light, and inhibited by red light, the responses to light signals during the developmental stages are not comprehensively understood. Therefore, we compared the effects of different types of light on both circumnutation and parasitism by germinating seedlings and mature shoots of Cuscuta campestris. Seedlings established parasitism under blue and far-red light, but not under red light, as has been reported repeatedly. By contrast, mature shoots exhibited coiling around the host and haustoria formation even under a red light as well as under blue and far-red light. These findings indicate that C. campestris modified its response to red light during the transition from young seedlings to mature shoots, facilitating parasitism. Light quality did not affect the circumnutation of either seedlings or mature shoots, indicating that circumnutation and the coiling movement that leads to parasitism were regulated by different environmental signals.

A Systematic Literature Review of Complementary and Alternative Veterinary Medicine: Laser Therapy.

Light therapy, or photobiomodulation, is a collective name for methods where tissue is irradiated with different types of light, with the aim of stimulating healing. Despite being frequently used, there is no consensus regarding the optimal treatment protocols for light therapy, nor its clinical efficacy. A systematic literature review was conducted, searching the relevant literature regarding light therapy in three databases, published between 1980-2020. The risk of bias in each article was evaluated. Forty-five articles met the inclusion criteria; 24 articles were regarding dogs, 1 was regarding cats, and the rest were regarding horses. The indications for treatment were musculoskeletal and neurologic conditions, skin disease and wounds, and pain. The literature review showed conflicting study results and unclear application for clinical use. This can be explained by the wide variety of treatment parameters used in the searched studies, such as wavelength, laser class, dose, and effect, as well as the frequency and duration of treatment. Although some beneficial effects were reported for light therapy, the studies also had limited scientific quality regarding these therapies, with a high or moderate risk of bias.

Accident Prevention Mechanism In Vehicles

The road accidents are recently increasing at a fast rate. Most of them happen because of the carelessness of the driver of the vehicles on the road. THE ACCIDENT PREVENTION MECHANISM IN VEHICLES is an attempt to reduce such road accidents by implementing some extra features on the vehicles which can be controlled by software. This project is developed on the basis of certain assumptions. 1.Most of the accidents are happened due to the carelessness or the drowsiness of the driver. 2.The driver may not detect the obstacle which comes in front of the Vehicles, from a safe distance. 3.The different light systems of the vehicles are not properly used whenever needed. This project tries to minimize the accidents which may be caused by the inability of the driver to take sudden actions in a panic situation. If the driver does not respond properly within a time slot, then the vehicle automatically steers to a safe space and continues the journey safely. This system automatically switches on the different types of lights in the vehicle such as head light, hazard lights, brake lights and indicators whenever needed. It includes a special wearable spectacle to detect the drowsiness of the driver. It provides the safety mechanism by invoking the buzzer and safe parking, when it identifies that the driver is asleep by analyzing the eye blink. This paper relates to the system for preventing accidents which contains IR sensors, Ultrasound sensors, LDR sensors and works according to a logically developed safe program which is imprinted on the microcontroller using Arduino IDE. This system is developed to overcome the inability of the vehicles to detect the obstacle from the front side and the drowsiness of the driver and do the necessary safe actions thus, reducing the road accidents.

An Explorative Investigation of the Effect of Naturalistic Light on Agitation-Associated Behavior in Nursing Home Residents With Dementia: A Pilot Study.

To study the effect of naturalistic light, programmed to replicate the spectrum distribution of natural light from dusk to dawn, on agitation measured with a Cohen-Mansfield Agitation Inventory-inspired score of nursing home residents with dementia. Though the effects of different types of light on the sleep-wake patterns of senior adults and people with dementia have been examined in several studies, the effects of naturalistic light systems, as a possible nonpharmacological intervention to improve sleep and reduce agitation, have yet to be extensively evaluated due to the relative novelty of the technology. The study was designed as a 6-month pilot study of a prospective interventional longitudinal cohort study, with five participants recruited from a single department of a Danish nursing home. The effect of naturalistic lighting on agitation-associated behaviors was recorded over a 3-day period pre- and postintervention. Results: An overall 71.2% reduction in the frequency of agitation-associated behaviors was recorded, with the frequency of some behaviors even reduced by 100%. This pilot study estimates that naturalistic lighting may be a promising nonpharmacological intervention to improve the overall agitation of nursing home residents with dementia, with a possible added benefit of an improved work environment for the staff. This study, therefore, finds indication for the performance of a randomized controlled trial with the same intervention and a larger cohort.

РОЛЬ СВІТЛА І ТІНІ У СТВОРЕННІ СУЧАСНОГО МОНОХРОМНОГО ІНТЕР’ЄРУ

Nowadays, the monochrome interior is gaining great popularity due to its simplicity and conciseness, which is a sign of new artistic approaches to designing interiors and equipment in the postmodern era. Light and shadow in the artistic design of residential interiors, namely in their monochrome solution, forms an artistic image that has a pronounced emotional character. The basic principles of using light and shadow in creating a modern monochrome residential interior were researched and formulated. Light shade is one of the most important factors in the formation of an interior space, especially a monochromatic one. It is he who complements, unites, changes all aspects that form such an interior, thanks to which the space acquires different scenarios and sounds and ceases to be boring and monotonous. From the results of the study, it follows that in the design of a modern monochrome interior it is worth: 1. Use and combine materials with different texture and texture, which when illuminated, thanks to nuanced shades, set the appropriate emotional mood of the space (calm, coziness, concentration, etc.). 2. Apply bright accents. A monochrome solution serves as a background that allows you to form active color accents on its background, which, when interacting with the environment, enhance the formation of individual interior elements. 3. Combine shades of the same color to achieve contrast and nuance. 4. Combine different types of lighting – natural and artificial: general, local, accent and decorative. 5. Traditional interior decoration is replaced by the use of various types of lighting, which saves materials and forms a stylized artistic image characterized by laconicism and aesthetic sophistication.

Применение освещения различного спектрального диапазона при клональном микроразмножении лесных ягодных растений

Creation of plantations of the most popular species of forest berry plants with high nutritional and medicinal value is advisable in connection with the reduction of such natural resources and the increased demand for berry products, as well as for the biological reclamation of depleted peat deposits. The paper shows the research results of clonal micropropagation of forest berry plants (cranberry, American cranberry, half-high blueberry, Arctic bramble, lingonberry, Kamchatka bilberry) of promising cultivars and forms using various types of lighting (white LED lamps, LED lamps with a combination of white, red and blue spectra, as well as white fluorescent lamps). Plants were cultivated using WPM and MS nutrient media with the addition of cytokinins 2-iP and 6-BAP in various concentrations. The largest number (3.3–16.9 pcs) and the maximum total length (13.8–251.1 cm) of microshoots of cranberry (Dar Kostromy cultivar, hybrid form 1-15-635), American cranberry (Ben Lear cultivar, hybrid form 1-23-3), Arctic bramble (Anna cultivar, hybrid form K-1), lingonberry (Kostromskaya rozovaya and Rubin cultivars) and Kamchatka bilberry (Sakhalinskaya and Kurilskaya forms) were observed under lighting by LED lamps with a combination of white, red and blue spectra at the “proper micropropagation” stage. The formation of the largest number (13.1 pcs) and the maximum length (98.7 cm) of microshoots of half-high blueberry (Northblue cultivar, hybrid form 23-1-11) was observed under lighting by white fluorescent lamps. There were no significant differences in biometric parameters of plants under different types of lighting depending on cultivars and forms. The use of LED lamps with a combination of white, red and blue spectra has a significant effect on the formation of microshoots of forest berry plants during clonal micropropagation. For citation: Makarov S.S., Upadyshev M.T., Kuznetsova I.B., Zaushintsena A.V., Kulikova E.I., Surina E.A. The Use of Lighting of Various Spectral Ranges for Clonal Micropropagation of Forest Berry Plants. Lesnoy Zhurnal = Russian Forestry Journal, 2022, no. 6, pp. 82–93. (In Russ.). https://doi.org/10.37482/0536-1036-2022-6-82-93

Identifying the Photometric Characteristics and Applicability of Hybrid Solar Lighting

The present research aims at promoting the stability and applicability of a hybrid daylighting system combining daylight and artificial light, which eventually enables a constant and pleasant luminous flux of the mixed light delivered by a terminal device installed indoors. That is, the present system allows a constant amount of luminous flux through its terminal device similar to an electric lamp, demonstrating its energy efficiency as well as comfortableness. The system effectively combines two different types of light, as solar rays are collected by a solar tracking sun light collector. The mixed light is transmitted indoors by optical fiber cables all the way to terminal devices installed indoors and discharged as needed. This feature enables the utilization of daylight to its full capacity, promoting solar availability. In this study, the photometry of hybrid lighting was experimentally measured and analyzed by using a spectrometer for different portions of sunlight when maintaining a constant luminous flux of mixed light. The effectiveness of hybrid lighting was explored for a number of cases in actual conditions, and the system was capable of delivering a constant illuminance of 1200 lux on a plane located 1.1 m away from the terminal device (light emitter). Finally, the system was installed in a test cell to verify its effectiveness for indoor illumination.