Evaluation of Four Fingerprint Development Methods for Touch Chemistry Using Matrix‐Assisted Laser Desorption Ionization/Time‐of‐Flight Mass Spectrometry,

Four preparation techniques for MALDI/TOF mass spectrometry were compared to determine the ability to gather intelligence for investigations through the chemical analysis of latent fingerprints, defined as “touch chemistry.” Compatible fingerprint development processes used for identification along with new techniques are necessary to evaluate touch chemistry. Ten volunteers deposited fingerprints from solvent residues containing drugs and explosives onto microscope slides. The developers included (A) fingerprint powder, (B) MALDI matrix, (C) fingerprint powder and lifting, and (D) cyanoacrylate fuming with fingerprint powder. Qualitative identification was based on ion images and spectra. The highest average detection rates (88%) were found using methods A and B. Methods C (52%) or D (18%) had limited success. Results demonstrate the importance of imaging coupled to extracted mass spectral data in detecting analytes in deposited fingerprints. Overall, the results suggest continued development of touch chemistry applications could prove useful for gathering intelligence and forensically relevant information.     

UNBUNDLING THE ETHICAL ISSUES OF PRO BONO ADVOCACY: ARTICULATING THE GOALS OF LIMITED‐SCOPE PRO BONO ADVOCACY FOR LIMITED LEGAL SERVICES PROGRAMS

This article seeks to articulate the practical goal of unbundled legal services for the pro bono family law sector as it applies to limited legal services programs (also known as brief advice clinics), through the use of a goal spectrum, derived from the theoretical goal of access to justice. This article briefly discusses the status of the Indiana Rules of Professional Conduct, as they pertain to the ethics of unbundling. This article then focuses extensively on some practical considerations within the ethical issues of both the scope of representation and attorney competence in order to articulate an appropriate goal for unbundled legal services. Finally, the article concludes that service providers in limited legal services programs should explicitly identify and then perform an essential, discrete service that the client needs to have performed in order to help the client meet his or her ultimate objectives. The service provider and the client could then gauge the success of the limited scope representation based on whether and how well the specific service has been provided.     

A note on the optimality of (even more) incomplete strict liability

This paper starts from the premise that liability is incomplete and establishes that firms may nevertheless invest excessively in care. This may justify a (further) reduction in the level of liability from a social standpoint, thereby arguing against seeking to approach full compensation as close as possible. In our framework, firms are liable under product liability, but also invest in care to prevent consumers’ switching to competitors. Affecting the partition of consumers by means of care-taking is not desirable from a social standpoint. Consequently, it may be optimal to reduce liability below a given level of incomplete compensation in order to adjust firms’ care incentives.     

刺激性毒剂希埃斯(CS)的检验

用化学显色法、红外光谱法(IR),以及色-质联用技术(GC/MS)分析具有强烈刺激性气味的毒剂希埃斯(CS),在缺少已知对照样的情况下,用以上方法,可做出准确的鉴定.     

An exploration of multi‐country political conflict/cooperation interdependence

Previous investigations of dynamic conflict actions and reactions among major countries have generally assumed the unit of analysis to be either a dyad or a triad. Our objective of the papa‐is to explore this assumption. The empirical analysis employs quarterly political conflict/cooperation among the United States, the (former) Soviet Union, China, Japan, and (West) Germany from 1950 to 1991. The model consists of a system of dynamic multiple regression equations. Various groups formed among mese countries are tested to find out whether they can be considered an autonomous unit of analysis. The analysis reveals several groups of countries whose political relations can be considered to be autonomous. In particular, either the United States‐the Soviet Union dyad or the United States‐the Soviet Union‐China triad is not an appropriate, autonomous unit of analysis in dynamic conflict action‐reaction models, because these countries are significantly influenced by the presence of other countries. New directions for future research are also suggested.     

RETHINKING THE “NORM” OF OFFENDER GENERALITY: INVESTIGATING SPECIALIZATION IN THE SHORT‐TERM

The life‐course approach to criminal career research has devoted a good deal of attention to the generality or specialization of offending behavior. Typically, extant research demonstrates versatility on the part of offenders, yet such findings could be attributable, at least in part, to time and measurement aggregation bias. This work uses a temporally disaggregated and individualized measure of diversity in offending to determine whether the previous findings of generality hold up to shifts in methodology. Using data from a sample of serious felons, results indicated that the magnitude of specialization is greater than in prior studies. Regression results indicated that certain demographic and local life‐circumstance variables are related to the extent of diversity. Theoretical and methodological implications are identified and discussed.     

A preliminary investigation into the comparison of dissolution/digestion techniques for the chemical characterization of polyurethane foam

Due to their widespread use in domestic and commercial premises, polyurethane foams, as either fragmented or bulk foam, are types of evidence commonly found at crime scenes. The traditional approach to determining the evidential value of polyurethane foam (PF) involves comparing recovered and control fragments under low and high magnification, under various lighting conditions, as well as the comparison of their respective dye spectra. As with most forms of trace evidence, chemical comparison is also desirable. In this work, two approaches to chemically comparing foam fragments were investigated, i.e. inductively coupled plasma–optical emission spectrometry (ICP–OES) analysis of the Tin (Sn) content in different foam types; and gas chromatography–flame ionization detection (GC–FID) analysis of soluble components in PFs mobilized by dichloromethane. Seven different foam types were studied and their Sn content was found to be different. They also produced characteristic GC–FID chromatographic profiles whose compounds were identified with gas chromatography–mass spectrometry (GC–MS) analysis. This study suggests that incorporating chemical data obtained from GC–FID/GC–MS and ICP–OES into a case involving PF could be advantageous, as this will enable the forensic scientist to broaden the comparison between control and recovered fragments, and further assess the strength of the evidence. However, ICP–OES analysis is a destructive technique with a relatively short sample turnaround time, whilst GC–FID analysis is more time-consuming and non-destructive, requiring corroboration with GC–MS data. The values of these two analytical techniques in the forensic chemical characterization of PFs are discussed.     

废水样中总硝基化合物的定量分析

利用气相色谱/质谱联用法对废水样中的2、4-二硝基甲苯和TNT进行了定性和定量分析,测定了废水中总硝基化合物的浓度.     

麻醉抢劫案件中咪达唑仓的检验

讨论了用薄层色谱和GC/MS分析咪达唑仑的定性方法,在实际检案中用此方法可作出准确鉴定.