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71.
Kaori M. Kubo Yukari Ogawa Masako Horikoshi 《Journal of the science of food and agriculture》2008,88(7):1259-1265
BACKGROUND: Funazushi is a fermented sushi containing n3 polyunsaturated fatty acids. Moreover, the functionality of lactic acid fermentation foods has come to be expected. Funazushi is therefore worthy of study. Funazushi has a specific flavor which is either strongly liked or strongly disliked. We examined the components of funazushi and investigated their relation to preference. RESULTS: Many free amino acids with sweetness and/or umami were present in funazushi, but nucleic compounds were scarce as taste elements. Twelve kinds of volatile elements were detected in all samples, which were thought to form the basis of the flavor of funazushi, although a total of 30 or more kinds of volatile elements were detected from each sample. The smell greatly influenced the overall evaluation. Panelists who had not eaten funazushi before, or only rarely, showed a tendency to prefer the same sample, from which ketones, aldehydes, or acids did not volatilize so much. On the other hand, individual variation was large among panels who commonly ate funazushi. CONCLUSION: The smell and sourness of funazushi greatly influenced preference, especially in persons who had little experience of eating funazushi. Funazushi containing low ketone, aldehyde, or acid levels is suitable for the first eating experience. Copyright © 2008 Society of Chemical Industry 相似文献
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73.
Alpha-1,3-Glucan is a cell wall component in Schizosaccharomyces pombe and is exclusive to budding yeast. We analysed the ultrastructure of the cell wall in the alpha-glucan synthase mutant mok1 and determined the role of alpha-1,3-glucan in cell wall formation of Sz. pombe. The mok1 mutant cell has an abnormal shape, with swelling at the tip or at the site of the septum. The cell wall is thicker and looser than that of wild-type cells, and the layered structure of the cell wall is broken. The glucan fibrils forming the protoplast retain a fine fibril structure, although their development into bundles is abnormal. We also report the localization of Mok1p by immunoelectron microscopy using high-pressure freeze substitution and SDS-digested freeze-fracture replica labelling methods. The Mok1p is localized on the cell membrane and moves from the cell tip to the medial region during the cell cycle. These results confirm that Mok1p plays an important role in the normal construction of the cell wall and in the primary step of glucan bundle formation, and that it is required for new cell wall synthesis during vegetative growth. These findings suggest that alpha-1,3-glucan is an essential component for cell wall formation in fission yeast. 相似文献
74.
Microaeration enhances productivity of bioethanol from hydrolysate of waste house wood using ethanologenic Escherichia coli KO11 总被引:1,自引:0,他引:1
Okuda N Ninomiya K Takao M Katakura Y Shioya S 《Journal of Bioscience and Bioengineering》2007,103(4):350-357
This is the first study showing the successful application of waste house wood (WHW) to the pilot-scale production of bioethanol by hydrolysis using diluted acid and fermentation using the ethanologenic recombinant Escherichia coli KO11. The major sugars in the WHW hydrolysate were glucose, mannose and xylose; the percentages were approximately 35%, 35% and 20% (w/w), respectively. In anaerobic fermentation using a 5-l reactor in which the oxygen transfer rate (OTR) was 0 mmol/(l x h), KO11 consumed only 25% of the xylose in the WHW hydrolysate over the examined fermentation time of 100 h; however, hexoses such as glucose and mannose were consumed completely. Microaeration at an OTR of 4 mmol/(l x h) enhanced the xylose utilization ratio of KO11 to 100%, at which the ethanol concentration was 35.4 g/l and the ethanol yield was 0.42, although the maximum ethanol concentrations were 28.8 and 26.6 g/l at OTRs of 0 mmol/(l x h) and 15 mmol/(l x h), respectively. Moreover, this microaerobic fermentation at OTR of 4 mmol/(l x h) was applied to 1000-l scale bioethanol production using the WHW hydrolysate. The xylose utilization ratio reached 100% and the ethanol yield was determined to be 0.45 for a 63-h fermentation, which were comparable to those obtained from the laboratory-scale fermentation. 相似文献
75.
Kei?IwasakiEmail author Yoshinori?Dobashi Fujiichi?Yoshimoto Tomoyuki?Nishita 《The Visual computer》2008,24(2):77-84
Particle-based simulations are widely used to simulate fluids. We present a real-time rendering method for the results of
particle-based simulations of water. Traditional approaches to visualize the results of particle-based simulations construct
water surfaces that are usually represented by polygons. To construct water surfaces from the results of particle-based simulations,
a density function is assigned to each particle and a density field is computed by accumulating the values of the density
functions of all particles. However, the computation of the density field is time consuming. To address this problem, we propose
an efficient calculation of density field using a graphics processing unit (GPU). We present a rendering method for water
surfaces sampled by points. The use of the GPU permits efficient simulation of optical effects, such as refraction, reflection,
and caustics. 相似文献
76.
Hiroki Dobashi Junichi Hiraoka Takanori Fukao Yasuyoshi Yokokohji Akio Noda Hikaru Nagano 《Advanced Robotics》2014,28(15):1005-1019
In a robotic cell, assembly robots have to grasp parts in various shapes robustly and accurately even under some uncertainties in the initial poses of the parts. For this purpose, it is necessary to develop a universal robotic hand and robust grasping strategies, i.e. finger motions that can achieve planned grasping robustly against the initial pose uncertainty of parts. In this paper, we propose a methodology to plan robust grasping strategies of a universal robotic hand for assembling parts in various shapes. In our approach, parts are aligned toward planned configurations during grasping actions, and the robustness of grasping strategies is analyzed and evaluated based on pushing operation analysis. As an application example, we plan robust grasping strategies for assembling a three-dimensional puzzle, and experimentally verify the robustness and effectiveness of the planned strategies for this assembly task. 相似文献
77.
78.
Zhang M Zhou X Iijima S Yudasaka M 《Small (Weinheim an der Bergstrasse, Germany)》2012,8(16):2524-2531
Carbon nanotubes perform well in preclinical tests for drug delivery and diagnostic imaging, but controlling the size at less than 100 nm to avoid nonspecific uptake by reticuloendothelial systems while targeting delivery to cells of interest via receptor-mediated endocytosis is difficult, which currently limits their widespread use. Herein, 20-50-nm graphene tubules, small-sized single-walled carbon nanohorns (S-SWNHs), are obtained with a yield of 20% or higher by an oxidative exfoliation of 100 nm pristine SWNH aggregates. S-SWNHs are highly hydrophilic and remarkably resistant to cellular uptake by macrophages (RAW 264.7 cells), tumor cells (HeLa or KB), or normal cells (FHs 173We). The nonstimulatory property to cell membranes therefore makes cellular uptake control of S-SWNHs by functionalization easy. By attaching phospholipid polyethylene glycol, the cellular internalization of S-SWNHs is almost completely inhibited in RAW 264.7 macrophages. When functionalized with tumor-targeting folic acid (FA), FA-S-SWNHs are taken up by FA receptor-overexpressing KB cells but not by normal human embryonic cells (FHs 173We), which do not express the FA receptor. With a high rate of stealth and targeting in vitro, S-SWNHs are one of the most promising nanoparticles for medical use. 相似文献
79.
The theory of initiation in lipid autoxidation, which deals with the supply of radicals to the chain reaction, has not been
substantively advanced for several decades. Most researchers have long assumed a mechanism of initiation in which main-product
hydroperoxide is centrally responsible for autocatalytic radical generation. However, this paper, in which we investigate
autoxidizing methyl linoleate, presents decisive evidence against such an assumption: Autoxidation-accelerating activity under
mild conditions was not found in the chromatographically separated main-product hydroperoxide fraction but was found in other
fractions; and highly active substances with structures containing a peroxide-linked dimer with two hydroperoxy groups were
actually obtained. 相似文献
80.