Green Lamps Research Articles

Downshifting photoluminescence of Erbium doped NaSrZrO3 for solid-state lighting

The synthesis of novel nanophosphors exhibiting unique morphologies with high purity, stability, eco-friendliness, and a high color rendering index is crucial to meet the demands of contemporary solid-state lighting energy devices. In this investigation, we successfully synthesized Na0.2Sr0.9-xZrO3:xEr3+ perovskite nanophosphors. All samples manifested an orthorhombic structure. The crystallite size was observed to increase with rising concentrations of Er3+. The optical band gap exhibited a range of 5.19 eV to 5.36 eV with increments in doping concentration, signifying alterations in the lattice constants attributable to crystalline disorder. The downshifting PL spectra revealed both host emission bands and dopant (Er3+) emission lines. The violet – blue band was attributed to crystalline disorder while the red emission band was assigned to octahedra tilting disorder in the perovskite. The presence of Er3+ ion lines at 523 and 546 nm produced intense green light, as depicted in the CIE chromaticity diagram for all doped samples. The study affirms that the phosphors synthesized in this research possess potential for application in the development of visible green lamps for optical display devices and solid-state lighting.

Keanekaragaman Serangga Nokturnal Berdasarkan Warna Lampu Perangkap Cahaya di Balai Penelitian Tanaman Sayuran Desa Tongkoh Sumatera Utara


 
 
 
 Nocturnal insects are a type of insect that is active at night and plays a role in maintaining the balance of the ecosystem and has an ecologically and economically occurring role. This study was conducted to determine the diversity, evenness, and dominance of nocturnal insects based on the color of the light trap lamp at the Vegetable Crop Research Center of Tongkoh Village, Karo Regency, North Sumatra. This study used the light trap method by making a transect 100 m long and on the transect, 5 observation stations were installed. There are 27 insect families consisting of 35 types of nocturnal insects with a total of 240 individuals. The most common type of insect found is Empoasca fabae. The diversity index (H') is included in the moderate category with a value of 2.10 on the green lamp trap, 1.38 on the blue lamp trap, 2.23 on the yellow lamp trap, 2.76 on the white lamp trap, and 2.26 on the red lamp trap, this shows that the insect diversity at the study site is in a stable condition. The dominance index (C) is categorized as low with a value of 0.184 on green light traps, 0.347 on blue lamp traps, 0.222 on yellow light traps, 0.092 on white light traps, and 0.150 on red light traps. This situation occurs because there is no type of nocturnal insect that is too dominant so that the diversity of insects is classified as being in a stable state.
 
 
 
 

Evaluation of driving fitness using driving simulators in patients with right-hemisphere damage: an unmatched case-control study

ABSTRACT Background Patients with right hemisphere damage (RHD) may exhibit mild unilateral spatial neglect (USN), which is difficult to detect in general assessments performed during driving rehabilitation. Objectives We compared driving simulator performance, practical driving performance, and neuropsychological test results between patients with RHD who were able and unable to return to driving to predict driving fitness based on driving simulator performance. Methods This unmatched case-control study included 29 patients with RHD who were able (return-to-driving group, n = 16) and unable (non-return-to-driving group, n = 13) to return to driving. Patient demographics, motor function, attention, driving simulator performance (participants’ reaction time and rate to green lamps appearing in any of the three displays and average lane position), and practical driving performance were compared between the groups. Receiver operating characteristic (ROC) analysis was performed to examine the predictive performance of driving fitness in reaction rate and paper-and-pencil tests. Results The non-return-to-driving group had a significantly lower reaction rate than the return-to-driving group (p = 0.027; 95% confidence interval [CI], 0–7; r = 0.407). No significant difference in reaction time or lane position in either the left or right lane during driving simulation was observed. ROC analysis of the reaction rate in the driving simulator task showed sensitivity of 0.692, specificity of 0.812, and area under the curve of 0.738 [95% CI, 0.541–0.935]. Conclusions Decreases in reaction rates during simulated driving assessments are associated with an inability to resume driving in patients with RHD. Such assessments may aid in predicting fitness for driving in these patients.

How Do Product Positioning and Consumer Knowledge of Green Brands Lead To Purchase Decisions?

Green branding has become a relevant strategy for winning the business competition. However, limited research has been conducted specifically investigating the role of green branding positioning on consumer green brand attitude and brand purchase. This study looks into the impact of green brand positioning on green purchasing decisions, considering consumer knowledge and consumer green brand attitude. Specifically, we examined how green brand positioning and knowledge form the green brand attitude and how green brand attitude determines green purchase decisions. Our research setting is green lamp purchase decisions. Respondents were green lamp purchasers and users, with a total sample size were 220 respondents. We developed several hypotheses and tested them using Structural Equation Modelling (SEM) with the AMOS 22. Our research findings showed that green brand positioning and knowledge positively and significantly impact consumers' green brand attitudes. Green brand attitude positively impacts green purchase decisions, and green brand positioning and knowledge positively and significantly affect a green purchase decision. In conclusion, our investigation showed that green brand positioning and green brand knowledge are essential for the formation of green brand attitudes and green brand purchase decisions. We also found the partial mediation of green brand attitude on the effect of green brand positioning on green brand purchase decisions. While for the impact of green brand knowledge on the green brand purchase decision, we did not find the mediating effects of green brand attitude. Keywords: green brand positioning, green brand knowledge, green brand attitude, green brand purchase decision

현대 러시아 문학 비평의 새로운 공간: 텔레그램 문학 채널을 중심으로

This article explored the changes in the existing cultural system, such as the changes in contemporary Russian literary field and the distribution and consumption of literature, in the online criticism space due to the development of digital technology. To this end, we first looked at the culture of online book reviews in Russia. We could see that today’s Russian literature considers the natural encounter between literature and new media as a new possibility for literary criticism.BR In this environment, it was confirmed that book critics’ blogs, which are online cultural intermediaries, are gradually being created by various individuals, and their influence is growing. The most vivid example of these book review bloggers is the literary critic Galina Yuzepovich. As an opinion leader, she is now considered a central figure in contemporary Russian literature.BR However, along with her, several individual book review bloggers are active as online cultural intermediaries and opinion leaders in the contemporary Russian literature criticism space. In this context we analyzed the personal blog of the Telegram Literature Channel, which is the most active SNS in Russia where readers participate: “Books & Reviews”, “Literature and Life”, “Green Lamp Books”. Through this, we confirmed that the Telegram literature channel we analyzed played an important role in the online literature field in that writers and readers participated, shared their tastes, and communicated together.

Diagnosis of abdominal tuberculosis by multi-targeted (mpt64 and IS6110) loop-mediated isothermal amplification assay.

Diagnosis of abdominal TB is an exigent task due to variable anatomical sites and non-specific clinical manifestations that closely resemble other diseases. Most of the available diagnostic modalities yield low sensitivities and need expertise to handle the specialized equipment. Hence, there is an urgent need to develop a rapid and reliable diagnostic test, so as to reduce the unnecessary morbidity. Therefore, we designed a multi-targeted loop-mediated isothermal amplification (MT-LAMP) for diagnosing abdominal TB. We evaluated an MT-LAMP (using mpt64 and IS6110) to diagnose abdominal TB within ascitic fluids and intestinal/peritoneal biopsies and compared these results with multiplex-PCR (M-PCR) using the same targets. MT-LAMP products were analyzed by gel electrophoresis and visual detection methods, that is, hydroxy naphthol blue and SYBR Green I reaction. Sensitivities of 80.9% and 84.6% were obtained in suspected (n=42) and total abdominal TB (n=52) cases, respectively by gel-based MT-LAMP, with 97.3% (n=37) specificity in non-TB controls. Notably, sensitivities attained by gel-based/SYBR Green I MT-LAMP in both clinically suspected and total abdominal TB cases were significantly higher (P<0.05) than M-PCR. Furthermore, sensitivity obtained with SYBR Green I was equivalent to that of gel-based MT-LAMP, while somewhat lesser specificity (94.6%) was attained with SYBR Green I, compared with gel-based MT-LAMP. Both gel-based and SYBR Green MT-LAMP exhibited equivalent sensitivities to diagnose abdominal TB. Because SYBR Green LAMP is easier to perform than a gel-based assay, we are currently focused on improving the specificity of this assay so as to develop a diagnostic kit.

Validation study of Boil & Spin Malachite Green Loop Mediated Isothermal Amplification (B&S MG-LAMP) versus microscopy for malaria detection in the Peruvian Amazon.

Malaria elimination efforts in Peru have dramatically reduced the incidence of cases in the Amazon Basin. To achieve the elimination, the detection of asymptomatic and submicroscopic carriers becomes a priority. Therefore, efforts should focus on tests sensitive enough to detect low-density parasitemia, deployable to resource-limited areas and affordable for large screening purposes. In this study, we assessed the performance of the Malachite-Green LAMP (MG-LAMP) using heat-treated DNA extraction (Boil & Spin; B&S MG-LAMP) on 283 whole blood samples collected from 9 different sites in Loreto, Peru and compared its performance to expert and field microscopy. A real-time PCR assay was used to quantify the parasite density. In addition, we explored a modified version of the B&S MG-LAMP for detection of submicroscopic infection in 500 samples and compared the turnaround time and cost of the MG-LAMP with microscopy. Compared to expert microscopy, the genus B&S MG-LAMP had a sensitivity of 99.4% (95%CI: 96.9%- 100%) and specificity of 97.1% (95%CI: 91.9%- 99.4%). The P. vivax specific B&S MG-LAMP had a sensitivity of 99.4% (96.6%- 100%) and specificity of 99.2% (95.5%- 100%) and the P. falciparum assay had a sensitivity of 100% (95%CI: 78.2%- 100%) and specificity of 99.3% (95%CI: 97.3%- 99.8%). The modified genus B&S MG-LAMP assay detected eight submicroscopic malaria cases (1.6%) which the species-specific assays did not identify. The turnaround time of B&S MG-LAMP was faster than expert microscopy with as many as 60 samples being processed per day by field technicians with limited training and utilizing a simple heat-block. The modified B&S MG-LAMP offers a simple and sensitive molecular test of choice for the detection of submicroscopic infections that can be used for mass screening in resources limited facilities in endemic settings nearing elimination and where a deployable test is required.

ОДЕССКИЕ ЛИТЕРАТОРЫ 1920-Х ГГ. В ПУБЛИЦИСТИКЕ Н.А. ЛОГУНОВОЙ (ИВАНОВОЙ)

The article is the fourth in a series of publications devoted to the biography and journalistic work of N.A. Logunova the Russian emigrant writer. It deals with the first years of her adult life in Odessa, the beginning of her literary career and the activities of the literary circle “The Green Lamp” (Zelenaya lampa). The authors focus on the first steps in the literature of the later famous Soviet writers and journalists V.P. Kataev, I.E. Babel, E.G. Bagritsky, Y.K. Olesha, etc., their first publications in the Odessa periodicals and their public speeches. In addition, it is about, one might say, a particular lifestyle of Odessa writers, formed under the influence of the cultural specifics of their home-city. Logunova tells in detail about the life of Eduard Bagritsky, who loved birds and was indifferent to the conveniences of life, describes the methods of Babel’s literary work, who from his youth aspired to the maximum saturation of his prose, literally honing every phrase, removing everything that he considered optional. The article also characterizes methods used by Odessa writers for adaptation to the new – Soviet – conditions of literary life, fundamentally different from the pre-Soviet – political situation.

Features of pubertas of young egg chickens when grown under monochromatic and white lighting

The work was carried out in the Amur region at the Belogorsk poultry farm. In the period from 2015 to 2019, five experiments were carried out taking into account the seasonality. The aim of the study was to identify the influence of the spectral composition of light sources on the pubertation of replacement young egg chickens at the age of 15 weeks: the development of the pineal gland, pituitary gland and genital organs of the youngs. The study on replacement young egg crosses of Hisex White and Decalb White chickens was carried out. In the breeding workshop, four groups of day-old chickens were formed, 200 heads each. From one day of age to 15 weeks, young birds were kept under light of different colors in conditions of gradually decreasing daylight hours from 24 to 12 hours a day and an illumination level from 50-30 to 7-6 lux. White, yellow, green and blue compact fluorescent lamps were used as light sources. In young birds at the age of 30, 60 and 90 days, the live weight was determined by weighing 100 heads from each group. A 15-week-old bird was bled for β-estradiol content at a random selection of 30 birds from each group. For anatomical examination, 5 pullets from each group were sacrificed at the age of 15 weeks, taking into account the body weight required by the norm. The absolute mass of the pineal gland, pituitary gland, ovary, oviduct was determined in the bird, the length of the oviduct was measured. Regardless of the season of the year, the live weight of 90-day-old young in groups under white and yellow illumination had the upper values of the norm, with green and blue it could be at its lower border. Under white and yellow illumination, pullets at 15 weeks of age have higher serum β-estradiol levels. At anatomical examination in 15-week-old chickens under white and yellow lamps, the absolute mass of the pineal gland is less by 10.5 - 41.7% than under green and blue ones, and the mass of the pituitary gland, on the contrary, is more by 4.8 - 8.3%. Pullets with different color illumination did not have significant differences in the mass of the ovary and oviduct, as well as the length of the oviduct, the level of development of which corresponded to a given age. Under white and yellow lighting, the first signs of the onset of puberty at 15 weeks of age are slightly more pronounced than under green and blue light sources.

Сопоставление рассказа А.С. Грина «Зеленая лампа» и его экранизации на уроке литературы в 8 классе

In the year of the 140th anniversary of A.S. Green’s birth, studying his works at school are as relevant as ever. Over the years, the reader’s interest in the writer’s work has not faded, and there are more opportunities for effective study of his works: for example, comparison with a film interpretation clarifies the analysis of the text and contributes to the emergence of the students’ own reading interpretation. The aim of the article is to describe the experience of studying A.S. Green’s story “Green lamp” by the 8th grade students, the educational and educational potential of which is evaluated and recognized by the methodology of teaching literature. The focus is put on the comparative analysis of the story and its film adaptation. The article uses the following methods: descriptive and analytical when discussing the visual and expressive possibilities of the film “Green lamp”, a method for comparing the implementation of the metaphor on which the story is based, in the text and on the screen. At the same time, the emphasis is placed on the possibilities of cinematography, and the Director’s interpretation becomes the “starting point” for formulating the questions and tasks offered to students. Experimental verification of the effectiveness of the developed tasks showed a high interest of students’ in their performance, the appearance of deeper and more accurate answers, active involvement in research and creative activities. The article focuses on the possibilities of comparing the text with the screen version as a methodological technique that contributes to the literary development of students. This approach to the organization of analytical and interpretive activities at the literature lesson, in our view, allows us to overcome the age restrictions associated with understanding the author’s idea. The results of the lesson on comparison show that the film impressions of schoolchildren change the character of the reader’s perception, enrich and deepen the study of the story of A.S. Green’s.

Из литературного быта 1920-х годов: круг журнала «Гермес»

The essay reconstructs history of a literary circle of authors united under the auspices of Hermes, a typewritten magazine edited in Moscow in the first half of the 1920s. These “poets- philologists” published three full issues of the magazine, 12 copies each. The fourth issue was prepared in just one copy and the authors considered it “unpublished.” Later they edited two typewritten almanacs: Mnemosyne and Hyperborean. The first part of the essay describes how the fourth and last issue of Hermes was collected and edited. Its preparation was accompanied by dramatic encumbrances caused by both external and internal circumstances, the most tragic of which was the death of Maksim Kenigsberg (1900–1924) one of the founders of the Hermes circle. Nina Wolkenau (1901‒1973?), who took his place as a chief editor was forced to cease the publication. The second part of the essay discusses the composition of authors represented in the fourth issue of Hermes, in particular those who joined the magazine from other Moscow literary associations, like Kifara and Green Lamp. Further, the table of contents of that “unpublished” issue is presented here with necessary commentary. A separate supplement is dedicated to a collection of poems by the authors of Hermes, either dedicated to members of this association, or directly related to the magazine itself. The third part of the essay, Addenda ad volumen, complements previous scholarly incursions regarding the circle of Hermes with the unpublished materials from the final issue of the magazine. These are Nina Wolkenau’s review of Mikhail Kuzmin’s book Novyi Gul’ (Leningrad, 1924), and Maksim Kenigsberg’s discussion of Pavel Muratov’s collection of novellas Moralí (Berlin, 1923), where he also wrote about Kuzmin’s art of prose. Another publication is Lev Gornung’s review of the posthumous collection of Nikolai Gumiliov’s poems K Sinei Zvezde (Berlin, 1923) Gornung published another version of that review in a printed “almanac of poetry and criticism” Even and Odd (Moscow, 1925) edited by the same circle of authors, as Hermes. The final supplement includes two other reviews of the Gumiliov’s collection. The émigré publication of K Sinei Zvezde was a significant event in the Soviet underground culture. The poems included in this book became a “lovers’ code” for young Russian readers of the 1920s.

Ulybyshev and Pushkin on the &amp;quot;bad synthesis of civilizations&amp;quot; (&amp;quot;Asiopa&amp;quot; in the light of the &amp;quot;Green Lamp&amp;quot;, 1819-1820)

Ulybyshev and Pushkin on the &amp;quot;bad synthesis of civilizations&amp;quot; (&amp;quot;Asiopa&amp;quot; in the light of the &amp;quot;Green Lamp&amp;quot;, 1819-1820)

&lt;strong&gt;Behavioral response of adult caddisflies (Trichoptera) to blue and green light-emitting diode lamps&lt;/strong&gt;

To clarify the effect of the visible spectrum, we collected Trichoptera adults using blue, green, and white light-emitting diode (LED) lamps and black light (BL) lamps. Except for white LED lamps, all lamps emitted broad-band wavelengths in the ultraviolet spectrum. A total of 212 adult Trichoptera were trapped. The most individuals were attracted by BL (96), followed blue (74), green (32), and white (10). Hydroptilidae spp. was the most abundant taxa among the lamps (183 individuals, 86.3%), followed by Cheumatopsyche brevilineata (23 individuals, 10.8%). Only Hydroptilidae spp. was common to all lamps. The Shannon–Wiener diversity index (H’) was highest at 0.96 for BL, followed by green (0.53), and blue (0.28). Trichoptera were attracted to both UV light and visible light. These results suggest that BL is the most useful for faunistic investigations of Trichoptera.

MONOCHROMATIC LIGHTING IN THE POULTRY HOUSE

The paper explores the impact of monochromatic illumination on replacement chickens of Decalb White cross-breed in the conditions of the Amur region. The chickens were grown from 1 day to 115 days age. The research was conducted in the conditions of the poultry farm “Belogorskaya”. The authors arranged four groups according to the principle of steam-analogues; each group contained 200 chickens and the experiment was carried out in the production unit. The researchers used luminous tube lamp with different colour temperatures for lighting. White lighting was used in the control group, yellow - in the first experimental group, green - in the second experimental group and blue - in the third experimental group. The researchers made blood test of chickens aged 30, 60 and 90 days for morphological and biochemical analysis. The authors carried out control weighing of the poultry at that time. At the end of the experiment, three pullets from each group were slaughtered in order to study the organs. The paper highlights morphological and biochemical blood parameters of replacement chickens at the white light had lower deviations from the physiological rate than at yellow, green and blue lamps. At the beginning of growing under yellow lamps, the concentration of gamma-globulin fraction of protein in the blood serum of chickens was higher than the age rate and the content of albumins was lower. Compared to the control group, the amount of bilirubin (P&lt;0.05) and the activity level of asparagine aminotransferase (P&lt;0.001) were higher under green and blue lamps. In the middle and at the end of the growing period, the number of leukocytes, creatinine, uric acid and asparagine aminotransferase may have increased in chickens under green and blue light. The difference among the results of blood tests of chickens grown under white light was, mostly reliable. When controlling the growth and development of replacement chickens aged 30 and 60 days the authors observed that the average body weight of chickens in white light was 1.5-3.9% higher than in the poultry of experimental groups. The average body weight of the chickens aged 90 days from all the groups was at the same level. The results of the control slaughter of pullets aged 115-days and grown under different lighting conditions were similar, and their sexual maturity was the same.

Effects of light quality during supplemental lighting on the flowering in an everbearing strawberry

The aim of this study is to examine the effect of the light quality of supplemental lighting during the night on the flowering and fruiting in an everbearing strawberry. Each plant of the everbearing strawberry (Fragaria × ananassa Duchesne 'Pechka') was transplanted into a 15-cm plastic pot in February 2016. The LED lamps were installed over the bench in a greenhouse kept by the minimum temperature 16°C, and night supplemental lighting was provided just after the transplantation. Lighting time was set to 16 h from 16:00 to 08:00, and PPFD was set to 80 µmol m-2 s-1 at the top of the plant. Three monochromatic lights were irradiated with blue, green, and red LED lamps which have a peak wavelength of 470, 530, and 640 nm, respectively. Plants under the blue LED produced the largest number of flower clusters whereas the plants under the red LED produced the fewest. The total weight of flower clusters including developed fruits plant-1 under the blue LED reached two times more than under the red LED in June 2016 because the blue light promoted the flowering and fruiting of each floret. There are some reports that show that the exogenous gibberellic acid (GA) stimulates runner formation and inhibits flowering. Moreover, cytokinin (CK) induces flowering in several plant species. According to our results, it is possible that the endogenous GA level is lowered and endogenous CK level is raised under blue LED light.

Mechanochemical-Assisted Leaching of Lamp Phosphors: A Green Engineering Approach for Rare-Earth Recovery

Abstract Rare-earth elements (REEs) are essential metals for the design and development of sustainable energy applications. Recycling these elements from waste streams enriched in them is crucial for securing an independent future supply for sustainable applications. This study compares the mechanisms of mechanical activation prior to a hydrometallurgical acid-leaching process and a solvometallurgical mechanochemical leaching process for the recovery of REEs from green lamp phosphor, LaPO4:Ce3+,Tb3+. After 60 min of processing time, the REE leaching rates showed a significant enhancement of 60% after cycled mechanical activation, and 98% after the combined mechanochemical leaching process. High-resolution transmission electron microscopy (HR-TEM) imaging disclosed the cause for the improved REE leaching rates: The improved leaching and leaching patterns could be attributed to changes in the crystal morphology from monocrystalline to polycrystalline. Reduction of the crystallite size to the nanoscale in a polycrystalline material creates irregular packing of chemical units, resulting in an increase in defect-rich grain boundaries in the crystals, which enhances the leaching process. A solvometallurgical method was developed to combine the mechanical activation and leaching process into a single step, which is beneficial for operational cost. This results in an efficient and simple process that provides an alternative and greener recycling route for lamp phosphor waste.

Optimized traffic control and data processing using IoT

The development of the Internet of Things facilitates various dimensionalities in a home, industrial and business applications. The integration of sensors and smart objects with accessible infrastructure makes the efficient data processing and decreases the human resource, operating time. The novel smart traffic control framework is proposed using local traffic smart server and remote cloud server to improve the traffic signal processing time that reduces the vehicles’ waiting time, congestion and pollution at the roadway intersection. This approach is also capturing the vehicle’s transition that is used to track high-speed vehicles. Optimized regression algorithm is proposed to collect multi-path data and compute single-point nifty decision using waiting vehicle density at four-direction roadway intersection. The sensor data is processed using regression algorithm and take the decision to change the lamp onset. The case study implementation has been demonstrated for four-direction roadway by considering the existing infrastructure with Arduino Uno kit and evaluated the smart traffic framework by comparing with normal traffic system. The results prove that proposed framework smooth the progress of hassle-free travel by reducing the waiting time for the green lamp onset, and also can be use the recorded vehicles images to track the high-speed vehicles.

Recovery of rare earths from the green lamp phosphor LaPO4:Ce3+,Tb3+ (LAP) by dissolution in concentrated methanesulphonic acid.

A process was developed for the recovery of rare earths from terbium-rich lamp phosphor waste. The process consists of a solvometallurgical leaching step with concentrated methanesulphonic acid (MSA) at temperatures between 433 K to 473 K, followed by solvent extraction with the acidic extractant di-(2-ethylhexyl)phosphoric acid (D2EHPA). Preliminary tests were performed on a synthetic lamp phosphor (LaPO4:Ce3+,Tb3+, LAP). The optimised conditions were afterwards applied to a real lamp phosphor waste residue, that was obtained after removal of yttrium and europium from lamp phosphor waste powder by a hydrometallurgical process. The leaching can be carried out at lower temperatures than digestion in concentrated sulphuric acid or fused alkali. The process takes advantage of the much higher solubility of the rare-earth methanesulphonates compared to the corresponding sulphates, so that solvent extraction can be performed directly on the leachate after dilution, without the need of several additional steps to convert the rare-earth sulphates into chlorides or nitrates.

Red and Green Parking Lamp Location Detection Method in UAV Environment

Red and Green Parking Lamp Location Detection Method in UAV Environment

ハボタンの白色蛍光灯照射下の栽培における昼温，夜温および昼夜温差が着色に及ぼす影響

ハボタンの紅色品種‘ウインターチェリー’および白色品種‘晴姿’を用い，着色に昼温，夜温および昼夜温差が及ぼす影響を，白色蛍光灯照射下で調査した．夜温の影響について調査した実験では，着色は，処理開始20日後までに，両品種とも，20／5°C（昼温／夜温）区および20／10°C区で認められ，20／15°C区では認められなかった．昼温の影響を調査した実験では，着色は，処理開始20日後までに，両品種とも，15／5°C区および20／5°C区で認められ，25／5°C区では認められなかった．昼夜温差を同一条件とした実験では，着色は，処理開始20日後までに，両品種とも，15／0°C区および20／5°C区で認められ，25／10°C区で認められなかった．すべての実験において，処理開始20日後における着色面積率は，20／5°C区が最も高かった．以上のことから，ハボタン‘ウインターチェリー’および‘晴姿’の着色を促す温度条件は，昼温20°C以下，夜温10°C以下であり，さらに，昼温20°C，夜温5°Cが最適であると考えられた．また，着色は，昼温が25°Cの高温であれば，夜温が10°C以下と低くても認められず，着色を促すには，昼温が夜温および昼夜温差よりも強く影響することが明らかとなった．