甜菜碱对感染巨型艾美球虫雏鸡生理生化参数的影响

对雏鸡接种巨型艾美球虫前１ｄ,在饲料中分别添加甜菜碱和马杜拉霉素,感染后第５,８,１１和１４ｄ测定鸡血液的有关生理和生化指标。结果表明,雏鸡白细胞、红细胞和血红蛋白的变化对该球虫非常敏感,这些指标可作为评估球虫感染状况的监测指标;并认为感染雏鸡电解质平衡紊乱是导致其死亡的主要原因之一;同时表明甜菜碱的抗球虫作用明显,对机体的电解质紊乱有改善作用,马杜拉霉素在控制球虫感染时对改善机体电解质紊乱的作用很小。     

The psychological impact of stalking on female undergraduates.

This study examined the psychological impact of stalking upon female undergraduates, a population previously determined to experience a surprising stalking prevalence rate. Despite common understanding that stalking has deleterious effects, there have been no previous efforts to systematically assess them with standardized measures. Thirty-six female stalking victims were compared with 43 females who had been harassed and 48 controls. Psychological impact was assessed with the Posttraumatic Stress Disorder Scale, the Symptom Checklist-90-R, and the Self-Report Interpersonal Trust Scale. Stalked subjects endorsed significantly more PTSD symptoms and with greater severity than the harassed or control subjects. Stalked subjects also had significantly higher scores on several subscales of the SCL-90, and had significantly higher positive symptom totals and distress indices.     

Electrospray and MALDI mass spectrometry in the identification of spermicides in criminal investigations.

Electrospray ionization (ESI) and matrix-assisted laser desorption/ionization (MALDI) mass spectrometry have been used to examine evidence in a sexual assault investigation. Because condoms are being used increasingly by sexual assailants and some condom brands include the spermicide nonoxynol-9 (nonylphenoxy polyethoxyethanol) in the lubricant formulation, the recovery, and identification of nonoxynol-9 from evidence items may assist in proving corpus delicti. A method was developed for the recovery of nonoxynol-9 from internal vaginal swabs and for its identification by reverse phase liquid chromatography/electrospray ionization mass spectrometry (LC ESI-MS), nanoelectrospray ionization (nanoESI) mass spectrometry, and high resolution MALDI Fourier transform mass spectrometry (MALDI-FTMS). The method was tested on extracts from precoitus, immediate postcoitus, and four-hours postcoitus vaginal swabs provided by a volunteer whose partner does not normally use condoms, but for this trial used a condom having a water-soluble gel-type lubricant that includes 5% nonoxynol-9 in its formulation. Subsequently, LC ESI-MS was used to identify traces of nonoxynol-9 from the internal vaginal swab of a victim of a sexual assault.     

Allele frequency distribution of the STR loci HUMTPOX, HUMTH01 and HUMVWA in Asturias (north Spain)

In order to use genetic loci in forensic identity testing, some population data are needed. This paper presents a report of allele frequency data for the loci HUMTH01, HUMTPOX and HUMVWA in a population sample from Northern Spain. No deviation from the Hardy-Weinberg equilibrium was detected in any of the three markers investigated and there was no evidence of association between the alleles of these loci. Statistical analysis was also carried out to obtain some parameters of medicolegal interest and comparative studies were carried out with other populations studied to date for these five loci. The Asturian sample does not differ substantially from other Caucasian and Spanish populations.     

Another death due to ingestion of Nicotiana glauca

Deaths attributed to ingestion of Nicotiana glauca are extremely rare. We report here a case where a 43-year-old man was found dead after apparently drinking a water extract of Nicotiana glauca. The primary alkaloid in the plant is anabasine. Toxicological analysis by capillary gas chromatography showed the deceased had a blood anabasine concentration of 2.2 mg/L. Clinically, the features of poisoning are nicotine-like and if death occurs it results from respiratory paralysis. The case further supports the view that, in the human, anabasine is considerably more toxic than nicotine.     

DISTANCE DECAY REEXAMINED

The "journey to crime," or the study of the distance between an offender's residence and offense site, has been a subject of study within criminology for many years. Implications arising from such research touches the majority of criminological theories. An overriding conclusion from this line of research is that most crimes occur in relatively close proximity to the home of the offender. Termed the distance-decay function, a plot of the number of crimes that an offender commits decreases with increasing distance from the offender's residence. In a recent paper, Van Koppen and De Keijser raise the concern that inferring individual distance decay from aggregate-level data may be inappropriate. They assert that previous research reporting aggregated distance-decay functions conceals individual variations in the ranges of operation, which leads them to conclude that the distance-decay function is an artifact. We do not question the claim that researchers should not make inferences about individual behavior with data collected at the aggregate level. However, Van Koppen and De Keijser's analysis raises four important issues concerning (1) the interpretation of the ecological fallacy, (2) the assumption of linearity in offender movements, (3) the interpretation of geographic work on profiling, and (4) the assumption of random target selection within a delimited range of operation. Using both simulated and nonsimulated data, we present evidence that reaches vastly different conclusions from those reached by Van Koppen and De Keijser. The theoretical implications of our analyses and possibilities for future research are addressed.