Hangzhou, China
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Zhonghui Z.,Zhejiang Police College | Xiaowei Z.,Zhejiang University of Technology | Fang F.,Zhejiang GongShang University
Saudi Journal of Biological Sciences | Year: 2014

The present study was designed to determine the effects of Ganoderma lucidum polysaccharides (GL-PS) on exhaustive exercise-induced oxidative stress in skeletal muscle tissues of mice. The mice were divided into four groups (three GL-PS administered groups and the control group). The control group was administered with distilled water and GL-PS administered groups were administered with GL-PS (50, 100 and 200. mg/kg body weight per day). After 28. days, the mice performed an exhaustive swimming exercise, along with the determination of superoxide dismutase (SOD), glutathione peroxidase (GPX), catalase (CAT) activities and malondialdehyde (MDA) levels in the skeletal muscle of mice. The results showed that GL-PS could increase antioxidant enzymes activities and decrease the MDA levels in the skeletal muscle of mice. This study provides strong evidence that GL-PS supplementation possessed protective effects against exhaustive exercise-induced oxidative stress. © 2013.

Despite the development of DNA profiling for criminal investigation, fingerprints remain the most common type of forensic evidence to be recovered from a crime scene. From the first identifications made at Scotland Yard in the early years of the 20th century, to the computerised storage and searching that is available now, the basic concept of making a fingerprint identification has not changed. Imperfections (or minutiae) in the pattern of ridge lines on the tips of fingers and on the palms provide the key to linking a fingerprint found at a crime scene (often referred to as a finger mark) to the fingerprint of an individual. Since its inception, many techniques have evolved to reveal finger marks, usually deposited in sweat, at the crime scene. Some, such as the use of a fine powder applied with a brush, are as old as fingerprinting itself and remain in use because they are simple and easy to use, and are effective at revealing invisible (or latent) finger marks. Today, the numerous techniques available are neatly summarised by the Home Office Centre for Applied Science and Technology in their Fingerprint Source Book, which is essential reading for any crime scene investigator. Generally, finger mark recovery techniques are arranged by reference to the surface (or substrate) on which the latent finger mark is deposited, with some substrates being historically problematic for latent finger mark recovery. One such substrate is the outer surface of spent brass shell casings, usually ejected from a firearm after firing. Often, at the scene of a crime involving the discharge of a fireman, these spent shell casings present the only physical evidence left by the offender, so their importance shouldn't be underestimated. Latent finger mark recovery from spent shell casings is difficult as the area of contact between the finger and the casing is limited due to the curvature of the casing and also because of the environmental extremes undergone by the casing during firing and ejection, which can all but obliterate latent finger marks. Following a serendipitous finding by researchers at Swansea University that rubbing a metal surface with a tissue does not necessarily remove the finger mark ridge minutiae, we started to investigate why this might be so – and, importantly, how the finger mark might be revealed. Through experimentation, we were able to show that the inorganic components present in fingerprint sweat, particularly chloride ions, were able to induce corrosion on the metal surface at the location of the finger mark deposit. Further, this corrosion was quite difficult to remove and remained even after washing the metal in warm soapy water to remove any trace of the original sweat deposit. Copper and its alloys (such as brass) were found to be very easily corroded by fingerprint sweat, which, potentially, makes this useful for finger mark recovery from spent brass shell casings. After further experimentation, a technique was devised that enabled a fine coloured powder to adhere preferentially to areas of corrosion on a brass disk, to which had been applied a large (about 2,500 V) electric potential. This powder adherence was developed to work with round brass shell casings, rather than a flat disk, and eventually commercialised. As might be expected, the main market for such technology lies outside the UK and since its development, has been used in many criminal cases, mainly in the US, to try and recover finger mark corrosion from spent brass shell casings. One positive aspect is that, because the corrosion is difficult to remove from the brass, the technique can be applied to casings that are many years old and relate to what are termed "cold cases". Fortunately, law enforcement agencies rarely destroy evidence – particularly from unsolved homicides – and these offences present ideal evidence for this technique. In 2015, the University of Leicester signed an agreement with Zhejiang Police College in China to collaborate in advancing forensic science research and teaching. An early result of this has been the joint development of an improvement in the way this technique works. Essentially, the electrically charged shell casing is now rotated in a bed of the powder, which makes the process easier than the original method of applying the powder directly to the casing. Why is this new development important? Well, as finger mark visualisation techniques that are quick, easy and effective are preferred, anything that makes the process easier to produce a positive result is to be welcomed. As the use of firearms in crime seems unlikely to diminish, this development offers law enforcement agencies a further opportunity to crack cases. Explore further: Fingerprint analysis technique could be used to identify bombmakers

Xu Z.,Zhejiang Police College | Wang C.,Shaoxing University
Journal of Animal and Veterinary Advances | Year: 2012

To investigate the effects of Radix Puerariae water Extract (RPE) on exercise-induced fatigue, 96 mice were randomly divided into four groups: Normal Control (NC), Low dose RPE Treated (LRT), Middle dose RPE Treated (MRT) and High dose RPE Treated (HRT) groups. The mice in the treated groups received RPE (2, 4 and 8 g kg" 1, ig) and the mice in the normal control group received drinking water ig for 4 weeks. The exhaustive swimming time, Blood Lactic Acid (BLA), Blood Urea Nitrogen (BUN), Hemoglobin (Hb) and liver glycogen were determined after swimming test. The results indicated that RPE had significant anti-fatigue effects on mice. It extended the exhaustive swimming time of mice, increased the Hb and liver glycogen contents and decreased BLA and BUN contents. © 2012 Medwell Journals.

Jin S.,Zhejiang University | Qu X.,Griffith University | Xu C.,Zhejiang Police College | Wang D.-H.,Zhejiang University
Physica A: Statistical Mechanics and its Applications | Year: 2013

Pedestrians' road-crossing behavior can often interrupt traffic flow and cause vehicle queueing. In this paper, we propose some moving rules for modeling the interaction of vehicles and pedestrians. The modified visual angle car-following model is presented for the movement of vehicles with consideration of the lateral effect of waiting pedestrians. The pedestrians' behavior is summarized as consisting of three steps: pedestrian arrival, gap acceptance, and pedestrian crossing. Some characteristic parameters of pedestrians are introduced to characterize pedestrians' behavior. Simulation results show that the interaction of vehicles and pedestrians lowers the traffic capacity and increases delays to both vehicles and pedestrians. © 2013 Elsevier B.V. All rights reserved.

Jin S.,Zhejiang University | Wang D.-H.,Zhejiang University | Xu C.,Zhejiang Police College | Huang Z.-Y.,Zhejiang University
Physics Letters, Section A: General, Atomic and Solid State Physics | Year: 2012

This Letter develops a new staggered car-following model taking into consideration lateral separation effects. Time-to-collision, calculated using visual angle variables, is introduced to describe the lateral separation distance and improve the optimal velocity model. The analytical and numerical results show that the stability of traffic flow can gradually be enhanced with the increase of lateral separation effects. The asymmetry property of traffic flow is also investigated using the new model. The results imply that incorporating lateral separation effects into the car-following model leads to the suppression of traffic jams and greatly enhances the realism of the model. © 2011 Elsevier B.V. All rights reserved.

Huo S.,Zhejiang Police College | Cui F.,Nippon Medical School | Ohno Y.,Nippon Medical School
Legal Medicine | Year: 2013

Penetrating head injury by foreign body is relatively uncommon and has been scattered reported in the literature. In this case, a transorbital impalement wound inflicted by bamboo objects was discussed. A 61-year-old alcoholized man died from a transorbital intracranial wound due to penetration of the left orbit after falling from a slope beside the road. Although the facial impalement injury was small and unobtrusive, the penetrating trauma itself could induce lethal consequences, special attention should be paid to such kind of cases. The autopsy and pathological examination revealed subarachnoid hemorrhage, brain contusion and intraparenchymal hematoma. Some pieces of bamboo were also detected in the left anterior cranial fossa. Based on all of the evidence and information, we can draw a conclusion that the bamboo was the instrument causing the injuries and the case was considered as accident. © 2012 Elsevier Ireland Ltd.

Hu W.,Zhejiang Police College
Revista Tecnica de la Facultad de Ingenieria Universidad del Zulia | Year: 2016

In order to improve the efficiency of solving the shortest emergency route and access to the global optimum, select the interactive genetic algorithm as the optimal route solving algorithm. In the interactive solution process, all the individuals of each generation correspond to a point in space, and the core step is using the roulette selection operator to select, so when reaching the next cross-operation, the two individuals with the similar fitness can have a larger probability of crossover, which is easy to get the optimal solution of the global convergence. Experiments have shown that using the genetic algorithm for optimal route has a high efficiency and good convergence.

Zhou J.,Zhejiang Police College | Yang Z.,Zhejiang Police College
CrystEngComm | Year: 2013

Sub-10 nm BaTiO3 nanocubes that can be highly dispersible in nonpolar solvents were successfully synthesized by using a solvothermal method with oleic acid as the surfactant. The results showed that BaTiO3 nanoparticles were capped with oleic acid molecules, which was essential for size control and monodispersibility of BaTiO3 nanocubes. © 2013 The Royal Society of Chemistry.

Ma M.-Y.,Zhejiang Police College
International Journal of Digital Content Technology and its Applications | Year: 2012

The remote examination system has gradually become one of the main areas of educational software design. The paper presents the design and implementation of police and tactics Distance Education Examination System based on .NET techniques. The system implements a simple online examination process, student users can log in, registration, online examinations and inquiries examinations; administrators can manage the papers, test scores.

Zhang Y.,Zhejiang Police College
Chinese Journal of Forensic Medicine | Year: 2013

Alcohol is closely related to human social activities, and alcohol-related medical problems and legal issues have received widespread attention. Alcohol dehydrogenase (ADH) is the main enzyme of ethanol's oxidative decomposition. This paper summarizes the nature of ADH, the relationship between ADH genetic polymorphism and alcohol metabolism, and the effects of different ADH families on ethanol metabolism as well as the relationship between ADH and diseases related to alcohol metabolism, aimed to provide reference for the application and research in forensic science and medical science.

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