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Sample records for saibo baiyo shisutemu

  1. Leading research on artificial techniques controlling cellular function; Saibo zoshoku seigyo gijutsu no sendo kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    Advanced research and its applicability were surveyed to apply the advanced functional cells to industry. The basic target was set to develop, produce, control and utilize the functional cells, such as intelligent materials and self-regulation bioreactors. The regulation factors regarding apotosis, which is a process of cell suicide programmed within the cell itself of multicellular organisms, cell cycle and aging/ageless were investigated. Furthermore, the function of regulatory factors was investigated at the protein level. Injection of factors regulating cellular function and tissue engineering required for the regulation of cell proliferation were investigated. Tissue engineering is considered to be the intracellular regulation by gene transduction and the extracellular regulation by culture methods, such as coculture. Analysis methods for cell proliferation and function of living cells were investigated using the probes recognizing molecular structure. Novel biomaterials, artificial organ systems, cellular therapy and useful materials were investigated for utilizing the regulation techniques of cell proliferation. 425 refs., 85 figs., 9 tabs.

  2. Effect of applied synthetic auxin on root growth in plantlet propagation by cuttage and tissue culture; Sashiki to soshiki baiyo ni okeru gosei auxin rui no shiyo koka

    Energy Technology Data Exchange (ETDEWEB)

    Shoji, K.; Yoshihara, T. [Central Research Institute of Electric Power Industry, Tokyo (Japan)

    1996-12-01

    The effect of synthetic plant hormone 4-C1-IAA and TFIBA on root growth in plantlet propagation was clarified by the cuttage and the issue culture of strawberry seedling production. A periwinkle, vine, and azalea are the effect of 4-C1-IAA on root growth, and a promotion effect was recognized for rooting and root elongation. The concentration of 4-C1-IAA in which the growth promotion effect of a root most appears varies depending on the species of a plant. The concentration of a periwinkle was 20 ppm, and that of an azalea was 2000 ppm. The growth promotion effect of a root in 4-C1-IAA and TFIBA was compared with IBA for an azalea. The result showed that 4-C1-IAA is the same in the effect as IBA and that TFIBA is higher than for IBA. The growth of a vine`s terminal bud was promoted by the effect of TFIBA on root growth, and the callus occurring when IBA was treated was not formed. The rooting of a strawberry was promoted by the effect of TFIBA on root growth. The combined use of TFIBA and BA promotes the growth of a side bud and forms a multi-bud plant. However, rooting was inhibited. The callus caused by the effect of BA on root growth could be suppressed through the combined use with TFIBA. 6 refs., 7 figs., 2 tabs.

  3. Cultivation of spirulina platensis and its growth behavior controlling cultivation medium; Baiyoeki sosei no seigyo ni yoru spirulina platensis no baiyo oyobi sono zoshoku kyodo

    Energy Technology Data Exchange (ETDEWEB)

    Kobayashi, K.; Fujita, K. [Babcock-Hitachi K.K., Tokyo (Japan)

    1996-01-20

    Cultivation of Spirulina platensis while controlling pH and nitrate ion in the culture medium was investigated in order to obtain a high density culture. In the cultivation of Spirulina platensis using sodium bicarbonate as a carbon source, the pH value increased during growth of Spirulina, and then the growth stopped at a pH value of more than 12. The cell concentration reached 2.2g/l by maintaining a pH range of 8.5 to 10.0 using CO2 gas without controlling the nitrate ion concentration. By controlling the pH and adding nitrate to a concentration of 2.0g/l, the cell concentration reached 4.2g/l at 350 hours. It was found that the cell concentration was about four times that of the culture without controlling pH and nitrate. 4 refs., 6 figs.

  4. Hybrid power generating systems of small wind power generators combined with solar cells or other generators.; Kogata furyoku to taiyoko, sonota tono haiburiddo hatsuden shisutemu

    Energy Technology Data Exchange (ETDEWEB)

    Koga, M. [Meidensha Corp., Ltd., Tokyo (Japan)

    2000-09-30

    Practical examples of the hybrid power generating system of small wind power generator combined with solar cells at a radio relay station at halfway up the mountain was outlined, and the effectiveness of a small hybrid power generating system of small wind power generator combined with micro hydraulic or micro gas turbine power generator was described. System interconnected large wind power generators are about to spread rapidly in Japan. But in terms of making good use of the small and unused natural energy, increasing uses of small independent and distributed power sources, as well as the international development assistance for un-electrified districts in developing countries, further technology developments and their support system are requested in small hybrid wind power generations as well. (NEDO)

  5. Chemical system integrated on micro-chip. Effects expected for liquid phase micro-space; Maikuro chippu ni shusekikashita kagaku shisutemu. ekiso bisho kukan ni kitaisuru koka toha?

    Energy Technology Data Exchange (ETDEWEB)

    hisamoto, H.; Kitamori, T. [The Univ. of Tokyo, Tokyo (Japan)

    2000-11-01

    Integrated chemical system is a system that integrates units required for transportation, reaction, separation, analysis, which are important for chemical experiment, on a glass substrate in a similar way as semiconductor device. Among it, a system to integrate analysis system is called , and is attracting worldwide attention for DNA electrophoresis analysis. Integrated chemical system has merits such as reduction in waste and high speed reaction, which can be expected from micronization, as well as short molecular diffusion distance, large relative interface surface, and small heat capacity, which are large advantages for high-efficient chemical reaction. The authors, with paying attention this technology, have realized analysis devices such as gene diagnosis, cancer immunity analysis, and environmental analysis, which are difficult by conventional analyzers. On the other hand, this technology is hopeful for organic synthesis and is expected as a technology to invite a large renovation in the chemical technology in the 21st century. (NEDO)

  6. Construction of data base and evaluation system for sealing capacity; Shiru noryoku ni kansuru detabesu no sakusei oyobi hyoka shisutemu no gainen sekkei ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Suzuki, U.; Sato, D.; Okamoto, M.; Yokoi, K. [Japan National Oil Corp., Tokyo (Japan)

    1998-10-30

    A conceptual framework for evaluation of sealing capacity was designed to provide a predictive tool for raps. Data on the sealing capacity were re-examined by a working hypothesis applied to case studies of the oil and gas fields concerned with exploration projects of The Japan National Oil Corporation. A seal data-base was thus constructed. A flow chart for seal evaluation was designed with regard to classification of traps into Capillary Limited Traps and Spill-Point Limited Traps. These results could form a contribution to a 3D modeling of trap prediction in the near future. (author)

  7. Proposal simplified estimation method for annual electricity generation of photovoltaic systems; Taiyoko hatsuden shisutemu no nenkan hatsudenryo no kan'i suiteihoshiki no teian

    Energy Technology Data Exchange (ETDEWEB)

    Unozawa, H.; Kurokawa, K. [Tokyo University of Agriculture and Technology, Tokyo (Japan); Sugibuchi, K. [Daido Hoxan Inc., Osaka (Japan)

    1998-12-05

    For designing photovoltaic (PV) systems appropriately, it is necessary to estimate solar radiation on an inclined surface at arbitrary azimuth and tilt angles accurately. The authors proposes a nomograph that expresses data graphically from irradiation database for 225 sites which proposed by the Japan Weather association. This allows to estimate easily solar radiation on an inclined surface. In addition, by combining the solar radiation climatic zone of Japan, solar radiation on an inclined in a simple procedure. In this paper, a simplified method for annual electricity generation calculation sheet is also proposed. By this work, fundamental planning work can be accomplished without any professional knowledge. (author)

  8. Study of the influence of microgravity on the biological cells and molecular level; Seitai saibo bunshi level ni okeru bisho juryoku no eikyo ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    The shape of osteoblast, gene appearance, gene of rice blast, cellular fusion of plants, gravity acceptance mechanism of unicellular organisms, and physiological and immunity functions of mice were investigated under the microgravity condition. The influence of gravity on the vital reaction and the influence of microgravity on the crystallization of vital substances were also investigated. For the observation of osteoblast, the fluorescence dye reacted with Ca was well taken in the cells. The microgravity affected the stability of rice blast, but hardly affected the protoplast culture of mushroom. The reaction of ciliate against the gravity related to the specific gravity difference between cells and outer liquid. The level of adrenaline in blood of mice increased during the drop. The moving speed of trigger waves of chemical parallel slit formed at the BZ reaction under the microgravity became 60% to 80% of that on the ground. In the case of crystallization at the deposition agent concentration of 1% to 4%, the turbidity showing the degree of crystallization changed complicatedly. Nine processes of crystal growth were recognized. 21 refs., 55 figs., 1 tab.

  9. Changes of inflammatory cells in rat lungs exposed to diesel emissions; Diesel haiki bakuro ni yoru rat hai no ensho saibo no henka

    Energy Technology Data Exchange (ETDEWEB)

    Kato, A. [Japan Automobile Research Institute Inc., Tsukuba (Japan); Kagawa, J. [Tokyo Women`s Medical College, Tokyo (Japan)

    1998-05-01

    Study was made on the effect of exposure to diesel emissions on inflammatory cells in a rat lungs. Four kinds of exposure gases with different contents of NO2 and particulate were prepared by diluting diesel emissions. Rats were exposed to diluted diesel emissions for 24 months, and inflammatory cells were detected morphologically in light microscopic and TEM specimens. As a result, particle-laden- alveolar macrophages increased dose- and time-dependently into the submucosa of intrapulmonary bronchioles, alveolar spaces and interstitume of alveolar walls, and bronchoassociated lymphatic tissues. Mast cells infiltrated into the interspaces of epithelial cells in airways. In the submucosa of the terminal bronchioles and the interstitume of alveolar walls, some sorts of inflammatory cells such as mast cells, plasma cells, neutrophils and lymphocytes infiltrated, and some cells showed cell-to-cell contacts. However, the airways were rarely injured by infiltration of inflammatory cells except for a fibrotic change. 2 refs., 2 figs., 2 tabs.

  10. Introduction effect of a load levelling system in an electric power system with a photovoltaic and wind system; Taiyoko/furyoku hatsuden wo donyu shita denryoku keito ni okeru fuka heijunka shisutemu no donyu koka

    Energy Technology Data Exchange (ETDEWEB)

    Kenmoku, Y.; Sakakibara, T. [Toyohashi University of Technology, Aichi (Japan); Nakagawa, S. [Maizuru College of Technology, Kyoto (Japan); Kawamoto, T. [Shizuoka University, Shizuoka (Japan)

    1998-12-05

    Introduction effect of load levelling system by a battery in an electric power system by a battery in an electric power system with a PV and wind system is investigated. Charge and discharge power of the battery are determined from a load curve and every hour data of PV and wind output. Annual cost of the power system is calculated from the generating power and the capacity of each source via the installed utility capacity and the capacity factor. It is found that (1) the battery system reduces the maximum demand and improves the load factor, (2) the cost effect of the battery system when introducing the PV system is higher than that when introducing the wind system. (author)

  11. Development of reverse osmosis seawater desalination system utilizing static pressure of deep sea and employing spiral-type membrane module; Supairarugata maku mojuru wo mochiita shinkai seiatsuto riyo gyakushintoho kaisui tansuika shisutemu no kaihatsu

    Energy Technology Data Exchange (ETDEWEB)

    Noda, H. [Hachinohe Inst. of Tech., Aomori (Japan). Dept. of Mechanical Engineering; Tagawa, K.; TOkunaga, Y.; Miyatake, O. [Kyushu Univ., Fukuoka (Japan). Dept. of Chemical Systems and Engineering; Sasaki, M. [Kyushu Univ., Fukuoka (Japan). Dept. of Chemical Systems and Engineering; Ebara Corp., Tokyo (Japan)

    1999-09-10

    The reverse osmosis (RO) technique employed in desalination systems requires the pumping up of seawater above its osmosis pressure mechanically. Development of a desalination system utilizing the high static pressure of the deep sea is investigated. Experiments of seawater desalination were carried out in the East-China-sea using a device in which a spiral-type RO membrane module was installed. It is proven that fresh drinking water can be obtained from seawater utilizing the static pressure of the deep sea, without the use of electric power. A numerical analysis was conducted to predict the amount of fresh water produced. Analytical results show sufficient agreement with experimental results. (author)

  12. Research on the preparation of highly functional ceramics aiming at fusing together with living cells. Pt. 2; Seitai saibo tono yugoka wo mezashita kokinosei ceramics sosei gijutsu ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Nishizawa, K.; Suzuki, T.; Nagae, H.; Kawamoto, Y.; Yokogawa, Y.; Nagata, F.; Tariyama, M.; Kameyama, T. [National Industrial Research Institute of Nagoya, Nagoya (Japan)

    2000-03-06

    The surface characteristics of surface-modified biocompatible ceramics made of {beta}-tricalcium phosphate (TCP) were found to change actively in tissue culture medium. Concentration changes of calcium and phosphate ions dissolved in distilled water or in culture medium showed that the solubility of the TCP ceramics was considerably high and depended on the pH value of the soaking medium. The most stable ceramics in the culture condition appeared to have the suitable surface for adhesion of L 929 cells. So, the solubility of the TCP ceramics as the cell carrier was considered to be the dominant factor in decreasing the adhesion of cells on TCP ceramics. Furthermore, it was found that the solubility and zeta potential of the surface-modified TCP ceramics, and cell adhesion and serum protein adsorption on the surface were varied with modification time. (author)

  13. Toxicity assessment of organochlorine compounds detected in water environment using cultured human cell lines; Hito yurai saibo baiyokei wo mochiita suikankyo shiryochu no yuki enso kagobutsu no dokusei hyoka

    Energy Technology Data Exchange (ETDEWEB)

    Kunimoto, M.; Yonemoto, J.; Soma, Y.; Nakasugi, O. [National Institute for Environmental Studies, Tsukuba (Japan)

    1997-11-10

    As part of validation processes of in vitro toxicity assays for the risk assessment of environmental hazards, we applied an in vitro toxicity test using two human cell lines, neuroblastoma NB-1 cells and glioblastoma U-87 MG cells, to the assessment of organochlorine compounds detected in the water environment. The in vitro toxicity assay using NB-1 cells was calibrated by testing reference chemicals proposed by MEIC (Multicenter Evaluation of In Vitro Cytotoxicity), an international program for the validation of in vitro cytotoxicity assays. Beforehand, an assay using cells in frozen stock without subcultivation was examined by comparing IC50 values with the ordinary assay using subcultured cells. IC50 values for MEIC reference chemicals from the former assay showed good correlation with those from the latter assay, suggesting that the assay using cells in frozen stock can be used at least for the assessment of basal cytotoxicity. IC50 values for ten organochlorine compounds frequently detected in the sediment samples from contaminated rivers, p-chloroaniline, 3,4-dichloroaniline, p-dichlorobenzene, o-dichlorobenzene, Tris (2-chloroethyl)-phosphate, 2,5-dichlorophenol, 2,5-dichloroanisol, Triclosan and Triclocarban, were obtained with the in vitro assays and compared with their LD50 values in rats. No significant correlation, however, was seen between the IC50 and LD50 values, indicating that further improvement of in vitro toxicity assays is necessary for the application to the risk assessment of environmental hazards. 7 refs., 4 figs., 1 tab.

  14. Tensile properties and cyto-toxicity of new biomedical {beta}-type titanium alloys; Atarashii seitaiyo {beta}gata chitan gokin no sekkei to sono kikaiteki tokusei oyobi saibo dokusei

    Energy Technology Data Exchange (ETDEWEB)

    Kuroda, D.; Niinomi, M. [Toyohashi University of Technology, Aichi (Japan); Fukui, H. [Aichi Gakuin University, Aichi (Japan). School of Dentistry; Morinaga, M. [Nagoya University, Nagoya (Japan); Suzuki, A. [Daido Steel Co. Ltd., Nagoya (Japan)

    2000-09-01

    Co-Cr alloy, SUS 316L stainless steel, pure Ti and Ti-6Al-4V ELI have been used as implant materials. Ti-6Al-4V ELI has been most widely used as an implant material to date because of its excellent combination of biocompatibility, corrosion resistance and mechanical properties. Since toxicity of V etc., and high moduli of elasticity have been pointed out, {beta}-type biomedical titanium alloys are recently getting much attentions, New {beta}-type biomedical titanium alloys composed of non-toxic elements such as Nb, Ta, Mo, Zr and Sn with lower moduli of elasticity and greater strength were, therefore, designed using alloy design method based on the d-electron theory in this study. Tensile test, measurement of modulus of elasticity and evaluation of biocompatibility were conducted in order to investigate the mechanical properties and biocompatibility of the designed alloy. Tensile strength and elongation of Ti-29Nb-13Ta-4.6Zr are, in particular, equivalent to those of conventional biomedical titanium alloy such as Ti-6Al-4V ELI, and modulus of elasticity of Ti-29Nb-13Ta-4.6Zr is lower than that of Ti-6Al-4V ELI. The moduli of elasticity of the designed alloys are equivalent or lower comparing with those of conventional biomedical titanium alloys such as Ti-6Al-4V ELI and Ti-13Nb--13Zr. The biocomparibility of Ti-29Nb-13Ta-4.6Zr is equivalent to pure-Ti, and biocompatibility of Ti-29Nb-13Ta-4.6Zr is much greater than that of Ti-6Al-4V. The new {beta}-type titanium alloy, Ti-Nb-Ta-Zr, designed in this study is expected to have greater performance for implant materials. (author)

  15. FY 1997 report on the survey of fundamental technologies in the field of brain neuro-biotechnology; 1997 nendo Sendo kenkyu hokokusho (noshinkei saibo kogaku kiban gijutsu no chosa kenkyu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    In Japan with its rapidly aging society, fundamental technologies are required for the development of artificial nerves substituting for or supporting damaged ones, and ultimately constituting artificial neurons based on the knowledge of the brain functions at the molecular and cellular levels. This study defines the fundamental technologies which would be required for the development in the area, and further, evaluates the potential of the technologies to develop the novel industry. The brain function is closely related to the activity in neuronal circuits. In order to repair injured nerves and to develop the advanced technologies of electronics for helping impaired neuronal functions, the most important and urgent is to understand how to work the neuronal circuit system in the brain. Based on these viewpoints, new methodological approaches would make it possible to relieve neural impairment in the sensory input system and the motor system by the use of electronic circuits. They also would improve rehabilitation after injury, and treat neurodegenerative diseases such as Parkinson`s disease. These advances surely create the new types of industry seeds in near future. 77 refs., 29 figs., 2 tabs.

  16. transmitted fresh water flow rate of reverse osmosis desalination system utilizing the static pressure head-formulation of numerical results and comparison with experimental results; Seiatsuto wo riyo suru gyakushintohodatsuen shisutemu no tansuisuikaryuryo-suchikaisekikekka no shikika oyobi shikkenkekka tono hikaku

    Energy Technology Data Exchange (ETDEWEB)

    Miyatake, O.; Tagawa, K.; Noda, H. [Kyushu University, Fukuoka (Japan)

    1999-07-10

    Based on the author's precious numerical results of a reverse osmosis desalination system for seawater or brackish water utilizing the static pressure head of seawater in a deep-sea region or brackish water in a vertical pit, a dimensionless expression is formulated to predict the transmitted fresh water flow rate from the geometry and the submerged depth of the device, the pure water permeability and the solute permeability of membrane, and the physical properties of seawater or brackish water. The derived expression is compared with experimental results obtained by field experiments carried out in the Sea of Japan and the East China Sea with fair agreement and thus confirmed the applicability and usefulness of the expression. (author)

  17. Research on the preparation of highly functional ceramics aiming at fusing together with living cells. Pt. 1. Application for biomaterial; Seitai saibo tono yugo ka wo mezashitaa kokinosei ceramics sosei gijutsu ni kansuru kenkyu. 1. Seibutesugakuteki shuho wo mochiita zairyo kaihatsu wo mezashit

    Energy Technology Data Exchange (ETDEWEB)

    Inagaki, H.; Maeda, S.; Kato, K.; Saito, T. [National Industrial Research Institute of Nagoya, Nagoya (Japan)

    2000-03-06

    We isolated the gene of Bone Morphogenic Proteins-1 (BMP-1) by RT-PCR (Reverse Transcriptase Polymerase Chain Reaction), and produced BMP-1 protein for the industrial application. We clarified theroles of BMP-2 and BMP-4, which are other members of BMPs, in cardiovascular formation at an early stage of embryo. In addition, we isolated a novel gene from bone mRNA and termed it rDLG-6. From the sequence comparisons by the BLASTX program, we found that rDLG 6 is a member of MAGUK (Membrane Associated Guanylate Kinase) family. (author)

  18. 77 FR 65578 - Certain Hydroxyprogesterone Caproate and Products Containing the Same; Notice of Receipt of...

    Science.gov (United States)

    2012-10-29

    ... and Procedure filed on behalf of K-V Pharmaceutical Company on October 23, 2012. The complaint alleges... Center of NJ; Hubei Gedian Humanwell Pharmaceutical Co., Ltd. of China; Hubei Saibo Chemical Co., Ltd. of... KY; Prescription Compounds of LA; Rye Beach Pharmacy of NY; Sherry's Drug Compounding and Natural...

  19. Assessing pearl quality using reflectance UV-Vis spectroscopy: does the same donor produce consistent pearl quality?

    Science.gov (United States)

    Mamangkey, Noldy Gustaf F; Agatonovic, Snezana; Southgate, Paul C

    2010-09-20

    Two groups of commercial quality ("acceptable") pearls produced using two donors, and a group of "acceptable" pearls from other donors were analyzed using reflectance UV-Vis spectrophotometry. Three pearls with different colors produced by the same donor showed different absorption spectra. Cream and gold colored pearls showed a wide absorption from 320 to about 460 nm, while there was just slight reflectance around 400 nm by the white pearl with a pink overtone. Cream and gold pearls reached a reflectance peak at 560 to 590 nm, while the white pearl with pink overtone showed slightly wider absorption in this region. Both cream and gold pearls showed an absorption peak after the reflectance peak, at about 700 nm for the cream pearl and 750 nm for the gold pearl. Two other pearls produced by the same donor (white with cream overtone and cream with various overtones) showed similar spectra, which differed in their intensity. One of these pearls had very high lustre and its spectrum showed a much higher percentage reflectance than the second pearl with inferior lustre. This result may indicate that reflectance is a useful quantitative indicator of pearl lustre. The spectra of two white pearls resulting from different donors with the same color nacre (silver) showed a reflectance at 260 nm, followed by absorption at 280 nm and another reflectance peak at 340 nm. After this peak the spectra for these pearls remained flat until a slight absorption peak around 700 nm. Throughout the visible region, all white pearls used in this study showed similar reflectance spectra although there were differences in reflectance intensity. Unlike the spectral results from white pearls, the results from yellow and gold pearls varied according to color saturation of the pearl. The results of this study show that similarities between absorption and reflectance spectra of cultured pearls resulting from the same saibo donor are negligible and could not be detected with UV

  20. Assessing Pearl Quality Using Reflectance UV-Vis Spectroscopy: Does the Same Donor Produce Consistent Pearl Quality?

    Directory of Open Access Journals (Sweden)

    Paul C. Southgate

    2010-09-01

    Full Text Available Two groups of commercial quality (“acceptable” pearls produced using two donors, and a group of “acceptable” pearls from other donors were analyzed using reflectance UV-Vis spectrophotometry. Three pearls with different colors produced by the same donor showed different absorption spectra. Cream and gold colored pearls showed a wide absorption from 320 to about 460 nm, while there was just slight reflectance around 400 nm by the white pearl with a pink overtone. Cream and gold pearls reached a reflectance peak at 560 to 590 nm, while the white pearl with pink overtone showed slightly wider absorption in this region. Both cream and gold pearls showed an absorption peak after the reflectance peak, at about 700 nm for the cream pearl and 750 nm for the gold pearl. Two other pearls produced by the same donor (white with cream overtone and cream with various overtones showed similar spectra, which differed in their intensity. One of these pearls had very high lustre and its spectrum showed a much higher percentage reflectance than the second pearl with inferior lustre. This result may indicate that reflectance is a useful quantitative indicator of pearl lustre. The spectra of two white pearls resulting from different donors with the same color nacre (silver showed a reflectance at 260 nm, followed by absorption at 280 nm and another reflectance peak at 340 nm. After this peak the spectra for these pearls remained flat until a slight absorption peak around 700 nm. Throughout the visible region, all white pearls used in this study showed similar reflectance spectra although there were differences in reflectance intensity. Unlike the spectral results from white pearls, the results from yellow and gold pearls varied according to color saturation of the pearl. The results of this study show that similarities between absorption and reflectance spectra of cultured pearls resulting from the same saibo donor are negligible and could not be detected