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151.
152.
Yao-Te Yen PhD Hung-Fan Liu BS Chung-Feng Wang PhD Yu-Ti Wang BS San-Chong Chyueh PhD 《Journal of forensic sciences》2024,69(2):688-697
Ketamine deemed as a psychoactive substance has gained popularity for recreational use owing to its hallucinogenic and dissociative effects. Understanding the synthetic processes of ketamine can provide essential clues for law enforcement officers against illicit ketamine manufacturing. In this case report, a chemical company was being monitored by law enforcement officers due to its importation of precursors and materials that could be used for the synthesis of illicit drugs. After materials and products seized from this chemical company were employed for analyses using gas chromatography–mass spectrometry, liquid chromatography–high-resolution mass spectrometry, and nuclear magnetic resonance analyses, ketamine, hydroxylamine, 2-chlorophenyl cyclopentyl ketone, and cyclopentanone p-toluenesulfonylhydrazone were identified. In addition, a novel process for the synthesis of ketamine precursor 2-chlorophenyl cyclopentyl ketone from cyclopentanone p-toluenesulfonylhydrazone and 2-chlorobenzaldehyde was validated. This is the first report to uncover this novel process for the synthesis of 2-chlorophenyl cyclopentyl ketone and can be used to increase awareness among law enforcement officers and forensic practitioners about these novel starting materials for the synthesis of ketamine. 相似文献
153.
Claudio Ciampini MSc Antonella Petrillo PhD Federico Zomparelli PhD Stefano Groutas 《Journal of forensic sciences》2024,69(1):301-315
Digitalization has increased the number of video surveillance systems that sometimes capture crime images. Traditional methods of human height estimation use projective geometry. However, sometimes they cannot be used because the video camera surveillance system is not available or has been moved and there are no reference lines on the frame. Scientific studies have developed a new method for human height estimation using 3D laser scanning. This model necessarily requires a series of approximations, which increase the final measurement error. To overcome this problem, in the present study, images of a subject are projected directly on the 3D model, estimating the height of the subject. This article describes the methodological approach adopted through the analysis of a real case study in a controlled environment executed by Carabinieri Forensic Investigation Department (Italy). The aim is to obtain a human anthropometric measure derived from frames extracted from the videos associated with the digital survey of the framed area obtained with 3D laser scanning and point cloud analysis. The result is the height estimation of five subjects filmed by a camera obtained through the combination of 2D images extracted by a DVR/surveillance systems with 3D laser scanning. Results show that most estimated measurements are less than the real measurement of the subject; it also depends on the posture of the subject while walking. Furthermore, results shows the differences between the real height and the estimated height with a statistical approach. 相似文献
154.
Hirozumi Okuda MD Hidetada Fukushima MD PhD Tomoaki Nakatsukasa MD Koji Yamamoto MD Asuka Kaizaki-Mitsumoto PhD Satoshi Numazawa PhD Yoshito Kamijo MD PhD 《Journal of forensic sciences》2024,69(1):351-354
Nerium oleander is an ornamental evergreen shrub belonging to the family Apocynaceae. The Apocynaceae family includes the attractive evergreen shrub known as oleander. The cardiotoxic glycoside, oleandrin, is present in all portions of the common oleander plant. Oleander consumption can result in deadly situations accidentally or as a suicide attempt. After consuming kettle-boiled oleander leaf extract as part of a suicide attempt, an 80-year-old man was discovered comatose in his home and taken to our emergency room. The patient's heart rate was 30 beats per minute, and he had hypotension. Arterial blood gas analysis revealed remarkable metabolic acidosis and hyperkalemia (K: 7.7 mEq/L). An electrocardiogram showed a wide QRS wave, similar to a sine curve. The patient collapsed following cardiac arrest soon after hospital arrival. Veno-arterial extracorporeal membrane oxygenation was initiated; however, the patient eventually died. The serum level of oleandrin at hospital arrival, subsequently measured by LC–MS/MS, was found to be 33.4 ng/mL, far above the levels reported in previous fatal cases. 相似文献
155.
Alex B. Brillantes Jr PhD Maricel T. Fernandez 《Asian Journal of Political Science》2013,21(1):80-101
Abstract The discipline of public administration in the Philippines has been undergoing its version of an ‘identity crisis’ over the past decade. This crisis has been manifested in four areas: (1) the inordinate influence of mostly American public administration theories and concepts upon Philippines public administration has led Filipino academics in the early to mid-1980s to ask the question ‘is there a Philippine public administration?’; (2) the perceived disconnect between theories of public administration as taught in schools and the realities in the outside world has raised questions of the relevance of the discipline to real world challenges; (3) the continued frustration over the perception that in spite of many public administration and governance reforms, the Philippines continues to be among the more corrupt nations in the region; and (4) the recent fascination of academics in other disciplines, especially economists, that ‘institutions matter’, has led some public administration scholars to argue that their discipline has been arguing precisely the same point since the 1950s. 相似文献
156.
Joseph ‘Yinka Fashagba PhD 《The Journal of Legislative Studies》2013,19(4):439-459
Oversight function is a major component of the activities of modern legislatures irrespective of the form of government in practice. This study examines the extent to which the Nigerian legislature, characterised by infrequent appearances on the political scene and operating in an environment largely dominated by the executive arm, has performed its oversight role. The study, which is basically empirical, argues that the Nigerian legislature has been incapable of effectively performing its oversight role because, in addition to constraints like executive interference, crippling internal conflict, inexperience and high rate of members turnover hampering legislative efficiency, the legislature has compromised its role. However, occasional flashes of a measure of assertiveness by the legislature suggest that with effective mitigation of its internal problems its performance will improve as legislative culture deepens. 相似文献
157.
This research explores the changing structure of the rural economy in the Philippines from 1988 to 2006. We found that the expansion and upgrade of infrastructure such as electricity and roads and investment in secondary and tertiary education are important factors that induced the economic transformation of the rural economy. The importance of higher education as an entry requirement to the nonfarm labor market has declined over time, indicating that the rural nonfarm sector has been increasingly providing employment opportunities to the unskilled and the uneducated, who form the bulk of the rural poor. 相似文献
158.
The aim of this study is to assess the comparative advantage in rice production in the Philippines for the past three decades since 1966. We have found that the country gained sharp improvement in comparative advantage in rice production in 1979, when yield rose remarkably due to the diffusion of pest‐ and disease‐resistant modern rice. Beginning in 1986 however, the country appears to have slowly lost its comparative advantage due to the decline in rice prices, stagnation in rice yield and rising cost of domestic factors. By 1990, the country completely lost its comparative advantage in rice production. 相似文献
159.
160.
Jonna Berry Ph.D. Ashley Gilbert B.S. Justin Grodnitzky Ph.D. 《Journal of forensic sciences》2019,64(6):1943-1949
Kava is an Oceanic plant in which the root is consumed as a beverage and is becoming increasingly popular. The effects of kava consumption may include sedation, euphoria, and impairment of motor coordination. This article demonstrates kava impairment through four cases of self‐reported kava use supported with Drug Recognition Expert (DRE) evaluations of each subject. Subject's urines screened negative for common drugs of abuse by immunoassay analysis. Urine from cases 3 and 4 were analyzed by liquid chromatography–tandem mass spectrometry, and gas chromatography–mass spectrometry, which yielded the presence of kavalactones. Subjects exhibited poor driving behavior and signs of intoxication. Indicators of impairment from multiple drug categories, central nervous system (CNS) depressants, CNS stimulants, and cannabis were observed, which may be consistent with the presence of multiple kavalactones and their diverse array of mechanisms of action. The consumption of kava can hinder one's ability to operate a vehicle safely. 相似文献