نتایج جستجو برای: Red light
تعداد نتایج: 533180 فیلتر نتایج به سال:
introduction: intense pulsed light (ipl) has long been used for skin rejuvenation. photo rejuvenation with red light (with or without photo sensitizer) is a newer noninvasive way for this purpose; but, until now few comparative studies between these modalities have been performed . the aim of this study was to compare efficacy, adverse effects, and compliance of intense pulsed light rejuvenatio...
in the present work, the znfe2o4 nanoparticle has been successfully synthesized. the obtained sample was characterized by x-ray diffraction (xrd), emission scanning electron microscopy (fe-sem) and its optical property was examined by uv-vis spectrophotometer. fe-sem revealed that the particle size of the znfe2o4 of about 47 nm was synthesized. the photocatalytic performance under uv-vis and vi...
plant cell cultures could be used as an important tool for biochemical production, ranging from natural pigments to pharmaceutical products. anthocyanin is affected by a variety of factors. light, an important plant environmental factor, influences the anthocyanin production in vegetative plant tissues. here, we have investigated the influence of the blue laser-diode (bld) and red laser-he ne (...
Recently much attention has been paid by horticulturists to light-emitting diodes as a new source of economical and spectral-selective light. The reason is mainly coming from their versatility in handling and mounting, long working time, wattage use efficiency and lower heat production. In this study we examined their potential in promoting seed germination and producing quality flower seedling...
One of the most important limiting factors in cultivation of strawberry in greenhouses during winter season is short day-length. An experiment was conducted to evaluate the effect of end-of-day red light on growth characteristics, yield and fruit quality of strawberry (cv. Queen Elisa) in a completely randomized design with 4 treatments in winter of 2013. Strawberry plants were exposed to red l...
Lisianthus is a slow-growing flowering plant whose seed germination and growth is a challenge in the tropics. Due to the marketability of this type of cut flower, this study was performed in two experiments to investigate the effect of seaweed extract (SWE) and LED on the growth of seedlings of two cultivars of lisianthus (namely Ariana and Mariachi) and its effect on flowering as a factorial e...
Light emitting diodes (LEDs) could provide specific quality and quantity of light for normal plant growth. Melissa officinalis L. is one of the most important medicinal plants in the world that has many applications in drug and flavoring industris. We cultivated lemon balm rhizomes in pot and placed the pots in four incubators containing LED lamps with the spectrum of red (100%), blue (100%), 7...
light as an important environmental factor, influences many aspects of plant growth and development. leaves are different in some characters including stomatal behavior under shade or light conditions. in this study, the effects of different levels of light intensity on stomatal behavior of two rose cultivars, ‘gulmira’ and ‘red one’, were evaluated under controlled conditions. to obtain differ...
this research was aimed to investgate the effect of light quality on micropropagation of pear rootstock oh×f333. first, single nodes explants were cultured in modified ql medium containing ba at four levels (0, 0.5, 1, and 2 mg/l-1) and iaa at three levels (0, 0.1, and 1 mg/l-1) and were evaluated for shoot proliferation. then, plantlets subcultured in modified ql medium containing 1 mg/l-1 ba ...
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