Myristicin. The major volatile component in mature seed ofPortenschlagia ramosissima

Portenschlagia ramosissima (Port.) vis. (Umbelliferae) seed contains 15% essential oils, 70% of which is the aromatic ether myristicin. These structural assignments were made from nuclear magnetic resonance, combined gas chromatography-mass spectrometry (GC-MS), and infrared and ultraviolet data. GC-MS data also indicate the presence of pinene, cymene, terpinene, elemicin, methyl eugenol, and a variety of sesquiterpene hydrocarbons.     

Mass spectra of acetylenic fatty acid methyl esters and derivatives

A series of isomeric methyl octadecynoates was analyzed by mass spectrometry; each isomer gave a unique spectrum. The characteristic ions were those resulting from a McLafferty rearrangement of the allenic sites or of the already-rearranged allenic sites. The acetylenic esters were also subjected to oxymercuration whereupon a carbonyl group was formed at either of the original actylenic carbon atoms providing two oxostearates. Further reaction with NaBH₄ formed hydroxy esters which, after silylation, gave diagnostic mass spectra indicative of the triple bond location. Applied to esters with both double and triple bonds, this procedure permitted differentiation between the two types of unsaturation. Methoxyl groups marked the original double bond locations and hydroxyls did so for triple bonds. Presented at the 48th Fall Meeting of the American Oil Chemists’ Society, Philadelphia, PA, September 29–October 2, 1974.     

Distributed Multi-Level Recovery in Main-Memory Databases

In this paper we present recovery techniques for distributed main-memory databases, specifically for client-server and shared-disk architectures. We present a recovery scheme for client-server architectures which is based on shipping log records to the server, and two recovery schemes for shared-disk architectures—one based on page shipping, and the other based on broadcasting of the log of updates. The schemes offer different tradeoffs, based on factors such as update rates.Our techniques are extensions to a distributed-memory setting of a centralized recovery scheme for main-memory databases, which has been implemented in the Dalì main-memory database system. Our centralized as well as distributed-memory recovery schemes have several attractive features—they support an explicit multi-level recovery abstraction for high concurrency, reduce disk I/O by writing only redo log records to disk during normal processing, and use per-transaction redo and undo logs to reduce contention on the system log. Further, the techniques use a fuzzy checkpointing scheme that writes only dirty pages to disk, yet minimally interferes with normal processing—all but one of our recovery schemes do not require updaters to even acquire a latch before updating a page. Our log shipping/broadcasting schemes also support concurrent updates to the same page at different sites.     

In defense of the flashbulb-memory hypothesis: A comment on McCloskey, Wible, and Cohen (1988).

Memory for the events surrounding the discovery of unexpected, shocking news (flashbulb memories) was the topic of an article by McCloskey, Wible, and Cohen (1988). They examined a strong and a weak construal of a flashbulb hypothesis and found both versions inadequate. We argue that McCloskey et al. (a) proposed an unrealistic "strong" theory, (b) failed to consider subjects' emotional reaction, (c) inappropriately used individual cases of inaccuracy, (d) made inadequate between-experiments comparisons, and (e) failed to note important differences between flashbulb memories and other memories. We conclude that discarding the possibility of a special flashbulb mechanism is premature. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A comparative analysis of four protocols for maximal treadmill stress testing

The purpose of this investigation was to compare the results from four commonly used maximal treadmill stress tests: Balke, Bruce, Ellestad, and a continuous multistage running protocol. The results compared serial and maximal heart rate, metabolic demands, and ECG determinations. Fifty-one healthy men, 35 to 55 years of age, volunteered for this study and were dichotomized into trained and untrained subjects. Regression analyses showed all the tests to correlate highly. No significant differences were found between tests at maximum for V02, heart rate, and blood pressure, except for V02 for the Balke as compared to the running protocol (39 vs. 41 ml./Kg-min). The Balke protocol showed lower values at maximum in VE and RP than the other three tests as well as the most gradual rate of progression in MET cost (0.5 METS per minute). The increase for the Bruce and Ellestad tests was from 1 to 1.5 METS per minute, and a rapid initial increase (9 METS in the first 3 minutes) made the running test undesirable as a screening method. Although serial plots of heart rate and MET costs were similar to those previously reported for different population samples, the present data further refined these values. Finally, a nomograph comparing treadmill time and V02, max. for the Balke, Bruce, and Ellestad tests was developed from these data.     

Making your own Automatic Test Equipment has never been easier

<正>Using Planet ATE's SOC "all-in-one" pin electronics solutions it is easy to make your own tester, ATE or to modify load boards for more advanced test capabilities.     

Alternatives for measuring knee extension strength of the elderly at home

The objective of this study was to determine whether pregnancy is associated with an acceleration of human immunodeficiency virus (HIV) disease progression in women who have a pregnancy while HIV infected. A retrospective review of all women aged 15-35 years who attended an HIV outpatient program from January 1989 through August 1995, was undertaken. The 192 women who had a term pregnancy after testing positive for HIV were compared with 164 women who were not pregnant during the same period. The main outcome measures were death, the occurrence of a first acquired immunodeficiency syndrome (AIDS)-defining condition, or a condition indicative of symptomatic HIV. Disease progression was assessed using the Kaplan-Meier method and multivariate proportional hazards models. Compared with nonpregnant women, women with a term pregnancy were significantly more likely to be African-American (88% vs. 78%, p < 0.05), younger than 22 years of age (51 % vs. 11%, p < 0.001), and to have entered the clinic with a higher median CD4 count (519 vs. 433 cells/microl, p < 0.001). After adjusting for entry CD4 count and other factors, pregnancy was not associated with progression to any of the study outcomes. Thus, in women attending a publicly funded clinic, pregnancy does not appear to accelerate the progression of HIV disease.     

Cyclopropene fatty acids of selected seed oils from bombacaceae,malvaceae, and sterculiaceae

Fatty acid compositions of seed oils from three species of Bombacaceae, eleven from Malvaceae, and six from Sterculiaceae were determined. Each of the seed oils contains varying amounts of both malvalic and sterculic acids accompanied by one or both of the corresponding cyclopropane fatty acids. In addition, the seed oil ofPachira aquatic Aubl. (Bombacaeae) contains 12.8% α-hydroxysterculic acid.     

γ-Linolenic acid inAcer seed oils

The octadecatrienoic acids inAcer negundo L. (maple family) seed oil include both 9,12,15- (1%) and 6.9,12-(7%) isomers. The chief monoenoic acids identified were 9-octadecenoic (21%), 11-eicosenoic (7%), 13-docosenoic (15%), and 15-tetracosenoic (7%). Also present is a considerable amount of 9,12-octadecadienoic acid. Investigation of ten other Aceraceae revealed their seed oils to have a similar fatty acid composition.