全文获取类型
| 收费全文 | 220篇 |
| 免费 | 5篇 |
专业分类
| 电工技术 | 1篇 |
| 综合类 | 1篇 |
| 化学工业 | 68篇 |
| 金属工艺 | 4篇 |
| 建筑科学 | 19篇 |
| 能源动力 | 5篇 |
| 轻工业 | 34篇 |
| 水利工程 | 1篇 |
| 石油天然气 | 1篇 |
| 无线电 | 18篇 |
| 一般工业技术 | 38篇 |
| 冶金工业 | 11篇 |
| 原子能技术 | 2篇 |
| 自动化技术 | 22篇 |
出版年
| 2024年 | 3篇 |
| 2023年 | 5篇 |
| 2022年 | 18篇 |
| 2021年 | 21篇 |
| 2020年 | 11篇 |
| 2019年 | 8篇 |
| 2018年 | 7篇 |
| 2017年 | 5篇 |
| 2016年 | 11篇 |
| 2015年 | 8篇 |
| 2014年 | 12篇 |
| 2013年 | 14篇 |
| 2012年 | 7篇 |
| 2011年 | 6篇 |
| 2010年 | 8篇 |
| 2009年 | 14篇 |
| 2008年 | 12篇 |
| 2007年 | 5篇 |
| 2006年 | 10篇 |
| 2005年 | 10篇 |
| 2004年 | 4篇 |
| 2003年 | 2篇 |
| 2002年 | 3篇 |
| 2001年 | 3篇 |
| 2000年 | 1篇 |
| 1998年 | 3篇 |
| 1997年 | 6篇 |
| 1996年 | 2篇 |
| 1995年 | 1篇 |
| 1994年 | 1篇 |
| 1993年 | 1篇 |
| 1991年 | 1篇 |
| 1986年 | 1篇 |
| 1985年 | 1篇 |
排序方式： 共有225条查询结果，搜索用时 0 毫秒
91.
Masashi Matsushima Takayoshi Suzuki Aya Masui Tetsuya Mine Atsushi Takagi 《Journal of Functional Foods》2013,5(2):729-735
It is known that cranberry inhibits the growth of Helicobacter pylori (HP). In human stomach, HP basically induces chronic inflammation by stimulating stomach cells to secrete interleukin (IL)-8 and other inflammatory cytokines, and causes stomach cancer, etc. The aim of this study was to investigate the inhibiting effects of cranberry on HP growth and IL-8 secretion from stomach cells induced by HP, using clinically separated HP strains. HP growth in liquid culture and on-plate culture was evaluated by titration after 2-day incubation and by agar dilution technique, respectively. For IL-8 experiments, MKN-45, a stomach cancer cell line, was incubated with HP for 24 h and IL-8 in the medium was assayed by ELISA. Cranberry suppressed growth of the bacteria only in six of the 27 strains. Meanwhile, it suppressed IL-8 secretion in all the strains. The results may suggest a possible role of cranberry in prevention of stomach cancer by reducing gastric inflammation. 相似文献
92.
A 400 Mbit/s CMI optical transmission experiment has been successfully conducted, using an LED, a GI multimode fibre and a 250 MHz bandwidth monolithic equalising amplifier. In this experiment, 5 km transmission distance has been achieved. The transmission characteristics and required transmission bandwidth are reported. 相似文献
93.
A stable and soapless latex of 2‐diethyl‐aminoethyl (DEAE)–dextran–methyl methacrylate (MMA) graft copolymer (DDMC) was developed for nonviral gene delivery vectors (complex between polycation and nucleic acid). DDMC was newly prepared using MMA and DEAE–dextran. Following a transfection protocol, transfection of HEK 293 cells by DDC1, DDC2, and DDC3 samples was carried out using plasmid DNA. With the transfection efficiency determined using the X‐Gal staining method, a higher value of 5 times or more was confirmed for DDMC samples DDC1 and DDC2 (but not for DDC3) than for the starting DEAE–dextran hydrochloride. The absorption spectrum shift at around 3400 cm?1 of the complexes between DDMC and DNA may support the formation of more compact structures by a Coulomb force between the phosphoric acid of DNA and the DEAE group of DEAE–dextran, concluding in DNA condensation. The specifically designed molecular structure of DDMC to ensure easy entry of DNA into cells needs not only a positive charge and a hydrophilic–hydrophobic microseparated domain but also more compact structures for transfection steps. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 98: 9–14, 2005 相似文献
94.
Akira Tanaka Aya Ryuno Saori Okada Akiharu Satake Yoshiaki Kobuke 《Israel journal of chemistry》2005,45(3):281-291
Dynamic equilibrium of self-assembled multi-porphyrin systems is of interest in obtaining switchable photoresponsive material, but rarely reported. 1-methyl-5-imidazolylcobalt(III)porphyrin ( 1Co ) synthesized here assembled automatically into cyclic trimer and tetramer by intermolecular imidazolyl-cobalt(III) coordination. The trimer-tetramer equilibrium was dependent on concentration and solvent, as examined by NMR spectrometry. In CDCl3, the tetramer formation was favored at high concentrations, as the ratio of the trimer to the tetramer was 1:2 at 14.8 mM 1Co , and shifted to 1:8 at 74 mM. Further, when the sample was concentrated from a CHCl3 solution to dryness, the ratio increased to 1:24 on dissolution. In CD3OD, on the other hand, only the trimer was observed in the wide concentration range. Accordingly, both the trimeric and the tetrameric structures could be prepared selectively by the choice of concentration and solvent. 相似文献
95.
Abstract— In the present set of experiments, we examined the mechanisms underlying color break‐up (CBU), a phenomenon observed when images produced with a color‐sequential projector are viewed. The perceived position of CBU was measured during fast eye movement, saccade with static and briefly flashed stimuli. Results showed that CBU did not simply correspond to the locus of the stimulus on the retina during saccades, because the width of the CBU perception was narrower than the distance of the eye movements. This effect was thought to be related to visual stability, which allows objects to be perceived as stationary even when the eyes move and the retinal image changes position. Visual stability is assumed to operate by compensating for the change in retinal image position using eye‐position signals; however, this compensation is imperfect during saccades. Thus, incomplete compensation results in a CBU perception that is of a narrower width than the amplitude of the saccade. In conclusion, CBU cannot be simulated with moving video cameras because it results largely from the mechanisms of visual perception. Large inter‐individual differences in perception of CBU were also found. This observation also supports the idea that CBU depends on the mechanism of perception. 相似文献
96.
Sasaki M Idiris A Tada A Kumagai H Giga-Hama Y Tohda H 《Yeast (Chichester, England)》2008,25(9):673-679
We report a gap-filling sequence between SPBPB21E7.09 (in contig c1348) and SPBPB10D8.01 (in contig pB10D8) on the left arm of chromosome 2 in the fission yeast, Schizosaccharomyces pombe. The sequence was determined from a BAC clone overlapping SPBPB21E7.01c (eno102) (in contig c1348) and SPBC1683.07 (mal1) (in contig pB10D8). The gap-filling sequence is 17,881 bp in length and contains five putative open reading frames, which were systematically named as SPBC460.01c, SPBC460.02c, SPBC460.03, SPBC460.04c and SPBC460.05. Their deduced amino acid sequences respectively include protein motifs corresponding to amino acid permease, glutathione S-transferase C-terminal domain, taurine catabolism dioxygenase TauD TfdA family and major facilitator superfamily, whereas their functions are unknown. 相似文献
97.
98.
Hiroyuki Ohkawa Yusuke Kobayashi Syusaku Akiba Kazutaka Hayashi Tetsuya Nakashima Aya Nakagawa Hitoshi Saiki Naohiko Ishimaru 《Journal of the Society for Information Display》2015,23(3):119-128
Strength is one of the most important properties of cover glass. In this study, fracture analysis is used to classify the breakage mode of cover glass into four typical modes. Moreover, the mechanism and evaluation method of each mode are investigated. Consequently, a chemical strengthening design with high compressive stress (CS) and low center tension (CT) is obtained. In addition, processing design is determined to be an important factor. Fining of edge processing and surface polishing after chemical strengthening are shown to enhance the edge and surface strength, respectively. 相似文献
99.
Ryota Tajima Takuya Miwa Teppei Oguni Aya Hitotsuyanagi Hiroyuki Miyake Haruki Katagiri Yuugo Goto Yumiko Saito Junya Goto Makoto Kaneyasu Masaaki Hiroki Minoru Takahashi Shunpei Yamazaki 《Journal of the Society for Information Display》2014,22(5):237-244
In an effort to create a truly flexible and wearable display having a flexible battery as well as a flexible organic light‐emitting diode panel and a flexible printed circuit, a flexible lithium‐ion battery has been developed, and a prototype wrist‐wearable or arm‐wearable display has been fabricated. Owing to improvements in the internal structure and exterior of the lithium‐ion battery, no remarkable changes in charge and discharge curves and the internal state of the electrodes were observed even after conducting a 10,000‐cycle bending test. Therefore, this flexible lithium‐ion battery prototype demonstrated remarkable bending resistance. Thus, we succeeded in fabricating a truly flexible and wearable display comprised of a flexible organic light‐emitting diode panel, a flexible printed circuit, and a flexible battery. 相似文献
100.
Y. Aya W. Shinohara M. Matsumoto K. Murata T. Kunii M. Nakagawa A. Terakawa M. Tanaka 《Progress in Photovoltaics: Research and Applications》2012,20(2):166-172
Methods to achieve a good balance among a high conversion efficiency, a large panel size and a high deposition rate of µc‐Si:H for mass production are shown here. For this purpose, an original technology called the Localized Plasma Confinement CVD (LPC‐CVD) method is investigated. Using know‐how from this method, an amorphous silicon/microcrystalline silicon (µc‐Si:H) solar panel, whose size is Gen. 5.5 (1100 mm × 1400 mm) and whose µc‐Si:H deposition rate is 2.4 nm/s, with a conversion efficiency of 11.1% (Voc = 161.7 V, Isc = 1.46 A, FF = 72.4%, Pmax = 171 W) is obtained. It is also experimentally confirmed that the value is equivalent to 10.0% of stabilized efficiency. Various reliability tests that conform to IEC standards have been performed for solar modules. It has been shown that the solar modules adapt to the major categories of IEC standards. Copyright © 2011 John Wiley & Sons, Ltd. 相似文献