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Dive into the research topics where Tibor Varga is active.

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Featured researches published by Tibor Varga.


Legal Medicine | 2009

Myocardium and striated muscle damage caused by licit or illicit drugs

Anita Réka Tóth; Tibor Varga

Illicit and central nervous system active licit drug consumption related deaths are mainly the consequences of either unintentional or intentional overdose. According to the data in the relevant literature occurrences of different organ damages are also observable and this can play a role in death, as well. Organ damages may appear simultaneously with overdosing or can be extended in time, which may lead to proving the cause of death and establishing the relationships with previous medication difficult. The most frequent damage observed is rhabdomyolysis syndrome, which has been mainly described after cocaine or opium consumption. Authors present four cases from the autopsy documentation of the period between 2003 and 2008 at the Institute of Forensic Medicine, University of Szeged, Hungary in which illicit drug consumption or neuroleptic licit drug medication resulted in development of myocardium and striated muscle damage. The dominant clinical symptoms were hyperthermia, renal and circulatory failure. The laboratory tests showed renal and liver insufficiency; in addition the CK and CK-MB level increase suggested damage in striated muscles. The focal myocardium and striated muscle damage could be assessed as the cause of death in one case, but microscopic investigation proved the presence of damage in each.


Forensic Science International | 2013

The frequency of alcohol, illicit and licit drug consumption in the general driving population in South-East Hungary

László Institóris; Anita Réka Tóth; Attila Molnár; Zsófia Árok; Éva Kereszty; Tibor Varga

In the framework of the DRUID (Driving under the Influence of Drugs, Alcohol, and Medicines) EU-6 project, a roadside survey was performed in South-East Hungary to determine the incidence of alcohol and the most frequent illicit and licit drug consumption (amphetamines, THC, illicit and medical opiates, cocaine, ketamine, benzodiazepines, zopiclone and zolpidem) in the general driving population. All 3110 drivers stopped between 01 January 2008 and 31 December 2009 were checked for alcohol, and among them 2738 persons (87.7%) participated in the further examinations, on a voluntary basis. Licit and illicit drugs were determined from their oral fluid samples by GC-MS analysis. Illicit drugs were detected in 27 cases (0.99%), licit drugs in 85 cases (3.14%), and alcohol (cut off: 0.1g/l) was found in 4 (0.13%) cases. Illicit drug consumption was the highest among men of the ages 18-34, during the spring, and on the week-end nights. With respect to licit drugs, the highest incidence was found among women over the age of 50, during the summer, and on the week-days. All alcohol positive cases were men over the age of 35. In comparison to international European averages, the alcohol and illicit drug consumption was low, but the licit drug consumption was over the European average.


Legal Medicine | 2009

The role of licit and illicit drugs in traffic (Hungary 2000-2007)

Anita Réka Tóth; Tibor Varga; Attila Molnár; Zsuzsanna Hideg; Gábor Somogyi

The authors analyzed the biological samples available in suspected DWI cases between 2000 and 2007. The result of the on-the-spot clinical test is not informative, especially at the simultaneous presence of alcohol. The average age (males 26.92 years, females 27.6 years) of the apprehended drivers is higher than in case of illicit drug users, and male dominance (1652 males--94% and 88 females--6%) is also more expressed. This male-female ratio corresponds to the epidemiological figures of drunken-driving, which may indicate identical driving attitude. Licit or illicit drugs in the urine could be detected in 1293 people out of 1740 (74.31%) whereas in 319 (18.33%) cases there was some substance present in the blood. The occurrence of multiple drug use was high. The use of THC, amphetamine and methamphetamine derivates are the most frequent. An increase in cocaine consumption has been observed for the last few years. The joint use of alcohol and drugs has increased, but the observed blood-alcohol concentrations are much lower than in simple drunken-driving cases. The evaluation of clinical symptoms on its own is not enough to evaluate the effects of drugs, especially when the effect of alcohol is to be considered at the same time.


Legal Medicine | 2003

Short tandem repeat data analysis in a Mongolian population

Tibor Varga; Christine Keyser; Zsuzsanna Beer; Zsolt Pénzes; Horolma Pamzsav; Klára Csete; Bertrand Ludes

Fifteen somatic (D8S1179, D21S11, D7S820, CSF1PO, D3S1358, TH01, D13S317, D16S539, D2S1338, D19S433, VWA, TPOX, D18S51, D5S818, FGA) and five Y-chromosome (DYS19, DYS390, DYS391, DYS392, DYS393) short tandem repeat (STR) system analyses were carried out in a Mongolian population in order to define the possible relationship between Mongolians and old Hungarian population. For STR data analysis the Microsoft Excel-PowerStats program was used. Inter-population data analysis was performed with Arlequin Software ver. 2.000. The somatic markers showed meaningful difference between Mongolians and old Hungarians but the distribution of the Y-chromosome STR systems refers to a closer relationship between the old Hungarian and oriental populations.


Legal Medicine | 2017

Changes in illicit, licit and stimulant designer drug use patterns in South-East Hungary between 2008 and 2015

Zsófia Árok; Tamás Csesztregi; Éva Sija; Tibor Varga; Éva Kereszty; Réka Tóth; László Institóris

The aim of this work is to present the changes in classical illicit and licit drug, as well as stimulant designer drug (SDD) consumption of suspected drug users in South-East Hungary between 2008 and 2015. Urine and/or blood samples of 2976 subjects were analyzed for these groups of substances of which 1777 (59.7%) were tested positive. THC was the most frequent (32.2%) substance, followed by classical stimulants (amphetamine, metamphetamine, MDMA, cocain) (21.4%), SDDs (17.0%), benzodiazepines (15.5%), medical opiates (codeine without morphine, methadone, tramadol) (4.03%), and morphine with or without 6-acethyl-morphine (1.98%). The annual rate of cannabis consumption continuously decreased after 2010. The use of classical stimulants was constant, except for a significant increase in 2015. Benzodiazepine incidence increased and remained steady after 2011. Medical opiate and morphine frequency was variable. SDDs were found in the highest number in 2012-13, exceeding the frequency of classical stimulants. The most prevalent SDDs were as follows: 2010 - mephedrone, 2011 - 4-MEC, methylone, MDPV, 4-FMC, and 4-FA, and 2012-2015 - pentedrone. Beside pentedrone, 3-MMC, αPVP, αPHP, and 4-CMC were detected with a notable number in this period. Multi-drug use was found in 30-43% of suspects tested positive between 2008 and 2014, which elevated to 52% in 2015. The frequency of substances in the biological samples corresponded to their seizure rate. When SDDs were included on the NPS list, their frequency in biological samples and in seized materials slightly decreased or did not change. However, a marked decrease was observed following classification as illicit drugs.


Forensic Science International | 2017

The role of illicit, licit, and designer drugs in the traffic in Hungary

László Institóris; Előd Hidvégi; Adrienn Dobos; Éva Sija; Éva Kereszty; László Balázs Tajti; Gábor Pál Somogyi; Tibor Varga

The aim of this study was to investigate the prevalence and pattern of psychoactive substances among suspected DUID (Driving Under the Influence of Drugs) drivers in Hungary in 2014 and 2015. Blood and/or urine samples of 1252 suspected drivers (600 in 2014 and 652 in 2015) were analyzed for classical illicit and licit drugs, stimulant designer drugs (SDDs), and for synthetic cannabinoids, with 78.3% and 79.6% positive cases for at least one substance in 2014, and 2015, respectively. Impairment was proven in 39.2% (2014) and 35.7% (2015) of all drivers tested, based on the legal criteria of Hungary. Classical illicit drugs were found to be present in blood or urine of 89-61%, drivers tested. Drivers also tested positive for legal medications in 20-22%, SDDs in 21-28%, and synthetic cannabinoids in 15-19% of all cases. This indicates a drop in prevalence for classical illicit drugs and a slight but statistically non-significant increase for the other three substance groups. The distribution of drug types in each category were: [1] classical illicit drugs: cannabis (432), amphetamine (321), and cocaine (79); [2] medicines: alprazolam (94) and clonazepam (36); [3] SDDs: pentedrone (137) and α-PVP (33); [4] synthetic cannabinoids: AB-CHMINACA (46) and MDMB-CHMICA (30). The average age of illicit drug and SDD users was 30 years, while legal medications users were 36 years old on average, and the mean age of synthetic cannabinoid users was 26.5 years. The presence of both alcohol and at least one drug in samples was found in about 10% of the cases, both years. The ratio of multi-drug use was 33.0% in 2014 and 41.3% in 2015. Compared to former years the number of drivers who tested positive for drugs doubled in Hungary, but it is still low compared to alcohol positive cases. The relatively low detected rate of DUID can be explained by (1) combined alcohol consumption masking drug symptoms, (2) the absence of road-side tests for illicit and designer drugs and, (3) police officers not adequately trained to recognize milder symptoms of impairment. Targeted education of police officers, prompt medical examination and the use of a symptom-focused on-site survey, could improve the efficacy of DUID investigations. Our findings are not comparable with drug consumption habits of the general driving population. The last roadside survey (DRUID EU-6 Project) was performed in Hungary in 2008-2009, prior to the mass spreading of designer drugs. As their appearance has drastically changed the pattern of drug consumption of the population, a new roadside survey, targeting general drivers, would be necessary.


American Journal of Physical Anthropology | 2006

Population origins in Mongolia: Genetic structure analysis of ancient and modern DNA

Christine Keyser-Tracqui; Eric Crubézy; Horolma Pamzsav; Tibor Varga; Bertrand Ludes


Journal of Catalysis | 2007

NMR spectroscopic and theoretical evidence of cinchona alkaloid-ketopantolactone complex formation in aprotic solvents : Implications for the mechanism of Pt-catalyzed enantioselective hydrogenation of activated ketones

Tamás A. Martinek; Tibor Varga; Ferenc Fülöp; Mihály Bartók


Catalysis Letters | 2004

Enantioselective Hydrogenation of Trifluoromethylcyclohexyl Ketone on Cinchona Alkaloid Modified Pt-Alumina Catalyst

Károly Felföldi; Tibor Varga; Peter Forgo; Mihály Bartók


Catalysis Communications | 2008

Enantioselective hydrogenation of fluorinated unsaturated carboxylic acids over cinchona alkaloid modified palladium catalysts

György Szőllősi; Tibor Varga; Károly Felföldi; Szabolcs Cserényi; Mihály Bartók

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Katalin Balázsik

Hungarian Academy of Sciences

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