The zinc test as an alternative for acid phosphatase spot tests in the primary identification of seminal traces

The value of the acid phosphatase spot test in the primary visualization and identification of seminal traces is hampered by the sensitiveness of the enzyme to biodegradation. An alternative spot test is proposed, based on the high concentration of the more stable zinc metal in seminal plasma. The proposed zinc spot test is simple and suitable for on site investigation. Although the sensitivity in fresh stains is lower than that of the acid phosphatase spot test, this is largely compensated by the lower sensitiveness to biodegradation. The specificity for semen is higher than that of the acid phosphatase spot test. In vaginal swabs it was nevertheless seen, that samples should be taken within 24 h after alleged sexual assault to give reliable results.     

Age estimation from the structure of adult human teeth: review of the literature.

The literature on age estimation from the structure of adult human teeth is reviewed. Several anatomic changes of teeth have been shown to be valuable in age determination, but there is still controversy concerning the accuracy of cemental annulation. It is believed that improvements in age estimation can be made using direct measurement rather than scoring systems.     

Toxicological findings in military aircraft fatalities from 1986-1990.

Toxicological findings in all military aircraft fatalities investigated by the Division of Forensic Toxicology at the Armed Forces Institute of Pathology from 1986-1990 are presented. Carbon monoxide saturation levels greater than 10% were found in 4% of the 535 cases where appropriate specimens were collected. Positive ethanol findings were more indicative of postmortem formation than antemortem consumption. In only 1 case were abused drugs (cannabinoids in a passenger) detected. Other drugs identified included nicotine, chloroquine and over-the-counter analgesic agents, antihistamines and sympathomimetic drugs.     

The irresistible force of freedom of speech meets the immovable object: trade mark law in South Africa

Legal context. The right of freedom of expression is a fundamentalright entrenched in the Bill of Rights incorporated in the SouthAfrican Constitution. While intellectual property rights donot enjoy this status, they are internationally recognised rightsgranted by a law of general application and may thus in termsof the Constitution limit the fundamental rights protected inthe Bill of Rights, and more particularly the right of freedomof expression. Where the enforcement of trade mark rights comes into conflictwith the right of freedom of expression, the two rights mustbe weighed up against one another and the competing interestsof the owner of the trade mark against the claim of expressionof a user without permission must be considered. The departurepoint of the weighing up process is that neither right is superiorto the other. Key points. This article discusses an action brought by SabmarkInternational, which claimed that Laugh It Off Promotions CCinfringed its registered trade mark BLACK LABEL in respect ofbeer by using a corruption of this mark with strong politicalundertones as ornamentation on T-shirts sold by it. It was claimedthat the offending use diluted Sabmark's registered trade mark.In an appeal, the Constitutional Court rejected the claim onthe basis that Sabmark had not shown that the offending usewas likely to cause economic damage to it. Practical significance. The case in effect equated trade markrights with rights enshrined in the Bill of Rights and thusgave important recognition to intellectual property rights.It created a precedent in intellectual property law, if notin South African law in general, in that the constitutionalcourt overruled a decision of the Supreme Court of Appeal (SCA)and in effect ruled that the SCA had not interpreted the relevantprovision of the Trade Marks Act correctly.