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排序方式: 共有314条查询结果,搜索用时 31 毫秒
91.
Tomoya Inoue Yuta Nemoto Takako Nagase Yasuhisa Hasegawa Yoshimichi Kiyozumi Koichi Sato Masateru Nishioka Satoshi Hamakawa Toshikazu Nishide Fujio Mizukami 《Korean Journal of Chemical Engineering》2008,25(3):437-442
We successfully developed zeolite membranes with hydrophilic character, by choosing appropriate zeolites in terms of hydrophilicity
and high acid tolerance. We evaluated thus developed membranes by their pervaporation (PV) performance, dehydration from acidic
organic solvent. The zeolite membranes we developed, based on merlinoite (MER), chabazite (CHA) or phillipsite (PHI), are
shown to exhibit stable dehydration performance, respectively. We successfully applied the membranes to the selective removal
of water in an ester condensation reaction starting from a stoichiometric mixture of a carboxylic acid and an alcohol. The
availability of pervaporation-assisted ester condensation reaction was validated by various kinds of combinations of carboxylic
acid and alcohols, which implies the general availability of pervaporation-assisted process intensification by zeolite membranes.
This paper was presented at the 11th Korea-Japan Symposium on Catatysis held at Seoul, Korea, May 21–24, 2007. 相似文献
92.
Sawada H Tomita T Naruse M Honda T Hambridge P Hartel P Haider M Hetherington C Doole R Kirkland A Hutchison J Titchmarsh J Cockayne D 《Journal of electron microscopy》2005,54(2):119-121
We have successfully developed a spherical aberration (Cs)-corrected electron microscope for probe- and image-forming systems using hexapole correctors. The performance of the microscope has been evaluated experimentally. The point resolution attained using the image-forming Cs-corrector is better than 0.12 nm. For scanning transmission electron microscopy, the Ronchigram flat area was >40 mrad in half-angle using the probe-forming Cs-corrector. 相似文献
93.
94.
Yasuhisa Oda Toshikazu Yamaguchi Yuya Shiraishi Kimiya Komurasaki Ken Kajiwara Koji Takahashi Atsushi Kasugai Keishi Sakamoto 《Journal of Infrared, Millimeter and Terahertz Waves》2011,32(6):877-882
A shock wave supported by an atmospheric breakdown plasma caused by a high-power millimeter-wave beam was studied. The shadow
graph image in a shock tube visualized the one-dimensional shock-wave generated by the millimeter-wave breakdown in atmosphere
for the first time. It was revealed that a normal shock wave propagated through the tube at the constant velocity while it
was detached from the ionization front of the plasma whenever the propagation velocity of the ionization front was supersonic
or subsonic. And it was visually clarified that the atmospheric millimeter-wave breakdown had the combined structure of the
normal shock wave and the heating region of the millimeter-wave plasma. The measured pressure of the shock front was as equal
as the normal shock which propagated at measured Mach number. 相似文献
95.
Comparative Analysis of DNA‐Binding Selectivity of Hairpin and Cyclic Pyrrole‐Imidazole Polyamides Based on Next‐Generation Sequencing
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Dr. Gengo Kashiwazaki Dr. Anandhakumar Chandran Sefan Asamitsu Dr. Takashi Kawase Yusuke Kawamoto Yoshito Sawatani Kaori Hashiya Dr. Toshikazu Bando Prof. Dr. Hiroshi Sugiyama 《Chembiochem : a European journal of chemical biology》2016,17(18):1752-1758
Many long pyrrole‐imidazole polyamides (PIPs) have been synthesized in the search for higher specificity, with the aim of realizing the great potential of such compounds in biological and clinical areas. Among several types of PIPs, we designed and synthesized hairpin and cyclic PIPs targeting identical sequences. Bind‐n‐Seq analysis revealed that both bound to the intended sequences. However, adenines in the data analyzed by the previously reported Bind‐n‐Seq method appeared to be significantly higher in the motif ratio than thymines, even though the PIPs were not expected to distinguish A from T. We therefore examined the experimental protocol and analysis pipeline in detail and developed a new method based on Bind‐n‐Seq motif identification with a reference sequence (Bind‐n‐Seq‐MR). High‐throughput sequence analysis of the PIP‐enriched DNA data by Bind‐n‐Seq‐MR presented A and T comparably. Surface plasmon resonance assays were performed to validate the new method. 相似文献
96.
Anusron Chueasamat Toshikazu Hori Hirotaka Saito Tomotaka Sato Yuji Kohgo 《Soils and Foundations》2018,58(2):290-305
In order to mitigate the damage due to sediment disasters, knowledge about how slopes fail due to rainfall is indispensable. The main objectives of this paper were to investigate experimentally the effects of surface sand layer density and rainfall intensity on the slop failures due to rainfalls. We conducted a series of experimental tests using 1g physical slope models constructed of Kasumigaura sand and a silt soil named DL clay for the permeable residual surface layer and the firm rock foundation, respectively. A total of nine cases with different combinations of surface sand layer densities and rainfall intensities was tested. Two types of failure: surface slide failure and retrogressive failure, were observed depending on the rainfall intensity and the surface sand layer density. The following mechanism of failure was accounted. At first some sands, which contained a lot of accumulated rainwater, flowed out (flowslide) at the slope toes. The flow slides may be due to the reductions of effective stresses as a result. When a surface slide failure occurred, most of the PWP (pore water pressure) values were still negative but the whole sand layers were almost at the saturation condition. In the case of retrogressive failures, seepage surfaces rose up to higher positions and excess PWPs appeared under the seepage surfaces. This difference of generation mechanism of PWP values may be the deciding factor in the difference in the type of failure. 相似文献
97.
Advancing Small‐Molecule‐Based Chemical Biology with Next‐Generation Sequencing Technologies
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Chandran Anandhakumar Seiichiro Kizaki Dr. Toshikazu Bando Dr. Ganesh N. Pandian Prof. Dr. Hiroshi Sugiyama 《Chembiochem : a European journal of chemical biology》2015,16(1):20-38
Next‐generation‐sequencing (NGS) technologies enable us to obtain extensive information by deciphering millions of individual DNA sequencing reactions simultaneously. The new DNA‐sequencing strategies exceed their precursors in output by many orders of magnitude, resulting in a quantitative increase in valuable sequence information that could be harnessed for qualitative analysis. Sequencing on this scale has facilitated significant advances in diverse disciplines, ranging from the discovery, design, and evaluation of many small molecules and relevant biological mechanisms to maturation of personalized therapies. NGS technologies that have recently become affordable allow us to gain in‐depth insight into small‐molecule‐triggered biological phenomena and empower researchers to develop advanced versions of small molecules. In this review we focus on the overlooked implications of NGS technologies in chemical biology, with a special emphasis on small‐molecule development and screening. 相似文献
98.
Role of inorganic chlorides in formation of PCDDs, PCDFs, and coplanar PCBs from combustion of plastics, newspaper, and pulp in an incinerator 总被引:1,自引:0,他引:1
The total amounts of dioxins found in exhaust gases from combustion of polyethylene (PE), polystyrene (PS), and poly(ethylene terephthalate) (PET) with approximately 3% (w/ w) NaCl were 6.07, 17.7, and 28.9 ng/g, respectively. Plastics containing benzene rings produced more dioxins than plastic containing no benzene ring. The amounts of dioxin formed in the exhaust gases from the combustion of newspapers impregnated with CaCl2, KCl, and NaCl were 18.6, 28.6, and 49.0 ng/g, respectively. Dioxin formation was associated with the bond energy between metal atom and chlorine atom. When newspapers impregnated with four different amounts of NaCl were combusted, the highest NaCl content newspaper (chlorine content 4.08%, w/w; lignin content 19.8%, w/w) produced the greatest amount of dioxins (174 ng/g). Pulp with NaCl (chlorine content 4.25%, w/w; lignin content 0.69%, w/w) produced more dioxins (6.71 ng/g) than pulp alone (0.799 ng/g) did upon combustion. The lignin content in a combustion sample correlated with the amount of dioxin formation. The results exhibited that combustion conditions with low CO concentration (<2 ppm) produced much less dioxins than conditions with high CO concentration (159 ppm). 相似文献
99.
Debittering of enzymatic hydrolysates using an aminopeptidase from the edible basidiomycete Grifola frondosa 总被引:3,自引:0,他引:3
Nishiwaki T Yoshimizu S Furuta M Hayashi K 《Journal of Bioscience and Bioengineering》2002,93(1):60-63
Bitter peptide solutions, prepared by the enzymatic hydrolysis of soy protein and milk casein, were treated with an aminopeptidase from the edible basidiomycete Grifola frondosa. As the incubation time elapsed, the amount of free amino acids released increased and the bitterness of the enzyme reaction mixtures decreased. However, the debittering of the milk casein hydrolysate by the aminopeptidase was less effective than that observed for the soy protein hydrolysate. Hydrophobic amino acids such as valine, leucine, phenylalanine, tyrosine, and isoleucine were preferentially released from the bitter solutions by the action of the aminopeptidase. 相似文献
100.
Exhaust gases from the combustion of poly(vinyl chloride) (PVC), polyethylene (PE), polystyrene (PS), poly(ethylene terephthalate) (PET), and theirvarious mixtureswere analyzed for PCDDs, PCDFs, and coplanar PCBs by gas chromatography/mass spectrometry (GC/MS) in order to investigate the role of PVC in these chlorinated compounds. Total amounts of dioxins (PCDDs + PCDFs) found in the samples were 11.7 ng/g PE alone, 1.17 ng/g from PS alone, 25.3 ng/g from PET alone, 448 ng/g from PE with PVC, 140 ng/g from PS with PVC, 126 ng/g from PET with PVC, 824 ng/g from PVC alone under low-CO level, and 8,920 ng/g from PVC alone under high-CO level. CO level in high-CO level condition was 880 ppm which was 20 times greater than that in low-CO level condition. Formation of coplanar PCBs ranged from 0.095 ng/g (PE alone) to 77 ng/g (PVC alone under high-CO level). There is a clear correlation between dioxin formation and chloride content. PCDFs composed 80% (PET + PVC)--98% (PET alone) of the total dioxins formed in the exhaust gases. The results indicate that PVC contributes significantly to the formation of PCDDs, PCDFs, and coplanar PCBs from mixtures of plastics upon combustion. 相似文献