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11.
Sakayanagi M Yamada Y Sakabe C Watanabe K Harigaya Y 《Forensic science international》2006,157(2-3):134-143
Inorganic anions were identified by using gas chromatography/mass spectrometry (GC/MS). Derivatization of the anions was achieved with pentafluorobenzyl p-toluenesulphonate (PFB-Tos) as the reaction reagent and a crown ether as a phase transfer catalyst. When PFB-Br was used as the reaction reagent, the retention time of it was close to those of the derivatized inorganic anions and interfered with the analysis. In contrast, the retention time of PFB-Tos differed greatly from the PFB derivatives of the inorganic anions and the compounds of interest could be detected without interference. Although the PFB derivatives of SO4, S2O3, CO3, ClO4, and ClO3 could not be detected, the derivatives of F, Cl, Br, I, CN, OCN, SCN, N3, NO3, and NO2 were detected using PFB-Tos as the derivatizing reagent. The inorganic anions were detectable within 30 ng approximately, which is of sufficient sensitivity for use in forensic chemistry. Accurate mass number was measured for each PFB derivative by high-resolution mass spectrometry (HRMS) within a measurement error of 2 millimass units (mmu), which allowed determination of the compositional formula from the mass number. In addition, actual analysis was performed successively by our method using trial samples of matrix. 相似文献
12.
Toshio Watanabe 《Asia-Pacific Review》2006,13(2):17-26
Three main characteristics of Japanese-style ODA over the past 50 years and the basic principle of the support for “self-help efforts” mentioned in the Japanese ODA Charter are described in this paper. The role of ODA in generating development effectiveness is taken up and possible ways for Japanese participation in the PRSP system are examined. The paper concludes with the proposal that offering ODA benefits not only the recipient but also the one extending assistance and recommends that Japan take advantage of the opportunity to serve the public good and thereby know genuine happiness. 相似文献
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Samples of postmortem pink teeth were investigated by scanning electron microscopy and electron probe X-ray microanalysis. Fracture surfaces of the dentin in pink teeth were noticeably rough and revealed many more smaller dentinal tubules than those of the control white teeth. Electron probe X-ray microanalysis showed that the pink teeth contained iron which seemed to be derived from blood hemoglobin. The present study confirms that under the same circumstance red coloration of teeth may occur more easily in the teeth in which the dentin is less compact and contains more dentinal tubules. 相似文献
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16.
Development of a Real‐Time PCR‐Based Method for Analyzing Semen‐Specific Unmethylated DNA Regions and Methylation Status in Aged Body Fluid Stains 下载免费PDF全文
Ken Watanabe Ph.D. Tomoko Akutsu Ph.D. Koichi Sakurada D.D.S. Ph.D. 《Journal of forensic sciences》2016,61(Z1):S208-S212
The detection of semen in forensic investigation is considered important evidence of sexual assault. In this study, we report the development of a real‐time polymerase chain reaction‐based method for identifying semen that can simply and rapidly analyze the semen‐specific unmethylated region of the DACT1 gene. Using two fluorescent probes designed for the methylated or unmethylated status, this method could perform quantitative analysis of the methylation status in this region. Furthermore, this method was used to analyze various body fluid samples, including 29‐year‐old semen and blood stains. The results showed that this method can detect almost exclusively semen or nonsemen signals even in highly decomposed samples, while a few semen or nonsemen samples showed slight signals of the other fluorescence probe. Although there is still a need for further analysis such as setting thresholds to analyze unknown samples, this method could be a useful supplementary tool for identifying semen, especially in old stains such as those in cold‐case investigations. 相似文献
17.
Taeko?WachiEmail author Kazumi?Watanabe Kaeko?Yokota Yusuke?Otsuka Michael?E.?Lamb 《Journal of Police and Criminal Psychology》2016,31(3):217-227
Two hundred and ninety-one new adult male inmates convicted of murder, robbery, arson, rape, forcible indecency, and kidnapping completed questionnaires about their pretrial interviews. Logistic regression analyses revealed that marital status, feelings of guilt, and perceptions of the strength of the evidence significantly affected the likelihood of confession by those who had already decided to confess prior to interview. By contrast, prior arrest history and interview style affected the likelihood of confession by those who had not previously decided to confess. Suspects who had no previous arrests and had undergone either Undifferentiated-high or Relationship-focused interviews were more likely to make full confessions. In Undifferentiated-high interviews, police officers employed all of the interviewing techniques examined: they listened closely to the suspects’ accounts, attempted to build good relationships, and discussed the crimes, while also presenting evidence and confronting the suspects. In Relationship-focused interviews, police officers listened attentively to the offenders’ accounts, tried to build good relationships, and discussed the crimes directly. Prisoners who experienced Relationship-focused interviews felt satisfied with their confessions and admitted guilt at trial. 相似文献
18.
Taeko Wachi Kazumi Watanabe Kaeko Yokota Yusuke Otsuka Hiroki Kuraishi Michael Lamb 《心理学、犯罪与法律》2013,19(7):673-694
Psychological studies of suspects' confessions have been conducted mostly in English-speaking and European countries, and the results may not generalise to countries whose cultures and policing practices differ. In particular, the difference between Japanese and Western laws may affect the roles that police interviewers play in suspects' confessions. This study examined the interviewing techniques used by Japanese police officers and associated features of the suspects' confessions. An extensive questionnaire was completed by 276 police officers across Japan. Detailed ratings of their interview techniques were factor analysed, yielding five factors: Presentation of Evidence, Confrontation, Rapport Building, Active Listening, and Discussion of the Crime. Based on these five factors, we identified four interviewing styles: Evidence-focused, Confrontational, Relationship-focused, and Undifferentiated. When interrogators employed the Relationship-focused interviewing style, suspects were more likely to make full confessions and to provide new information. By contrast, suspects were more likely to make partial confessions and were less cooperative when the police officers employed an Evidence-focused style. 相似文献
19.
Tomoko Akutsu Ph.D. Hiroshi Ikegaya M.D. Ph.D. Ken Watanabe Ph.D. Hisayo Fukushima Ph.D. Hisako Motani D.D.S. Ph.D. Hirotaro Iwase M.D. Ph.D. Koichi Sakurada D.D.S. Ph.D. 《Journal of forensic sciences》2010,55(3):742-746
Abstract: In this study, Tamm‐Horsfall protein (THP), a major component of urinary protein, and uroplakin III (UPIII), a transmembrane protein widely regarded as a urothelium‐specific marker, were evaluated for forensic identification of urine by ELISA and/or immunohistochemistry. THP was detected in urine, but not in plasma, saliva, semen, vaginal fluid, or sweat by the simple ELISA method developed in this study. In addition, most aged urine stains showed positive results. The urine specificity of THP was confirmed by gene expression analysis. Therefore, as reported previously, ELISA detection of THP can be used as a presumptive test for urine identification. UPIII was specific for immunohistochemical staining of cells in centrifuged precipitate of urine. However, ELISA and RT‐PCR for UPIII were not specific for urine. UPIII may be applicable for forensic urine identification by immunohistochemistry. 相似文献
20.
K Yamamoto H Watanabe K Ukita H Wazawa Y Yamamoto Y Fukui 《Archiv für Kriminologie》1991,188(3-4):72-76
Two young men and a 17-year-old girl gathered in order to take methamphetamine, the quantity of which remained unknown. After a short time one of the men died on the scene; the other man, who was alcoholized in addition to having taken methamphetamine, fell over a railing from a height of several metres and suffered severe injuries before dying. The girl, who left for home by taxi, collapsed and died in a hospital about 2 hours later. Methamphetamine was detected in the blood of all three people. The autopsy results and the toxicological findings are reported and discussed with reference to the literature data. 相似文献