An outbreak of food poisoning in a military establishment

Background: An outbreak of food poisoning in a military establishment mess was investigated and remedial measures suggested.     

高效液相色谱法测定寒痹停片中士的宁含量

目的：建立用ＨＰＬＣ测定寒痹停片中士的含量的方法。方法：氰基柱;流动相－甲醇－水－三乙胺－乙酸（９８００：１５５：１５：３０）;紫外检测波长２５４ｎｍ。结果：在４～２０ｕｇ／ｍｌ范围内,标准曲线回归方程为：Ｙ＝－２８０３＋８９６７ｘ（ｒ＝０．９９９７）,ＲＳＤ＝１．６５％?加样回收率的平均值为９９．８２％。结论：实验表明,这是一个适用于生产控制和产品质量检验的简单、快速、准确的方法。     

Extended TIP(P) analogues as precursors for labeled delta-opioid receptor ligands

Tyr-Tic-Phe-Phe-OH (TIPP) and the shorter Tyr-Tic-Phe-OH (TIP) peptides are potent and highly selective antagonists at the delta-opioid receptor and, therefore, are ideal candidates for the attachment of labels to assist in the study of delta-opioid receptors. Peptides extended at the C-terminus with residues which can be used as handles for further modification and/or labeling (i.e. Asx, Glx, and Lys) were synthesized. The TIPP-D/L-Asx/Glx derivatives exhibited similar delta-receptor affinity to TIPP (K(i) = 5-10 nM vs K(i) = 6 nM), and neither the location of the carboxylic acid moiety nor the stereochemistry of the C-terminal residue significantly affected the delta-receptor affinity of these derivatives. Extension of TIPP with an additional residue did not increase mu-receptor affinity, even though the position of the acidic group, which imparts delta-receptor selectivity to TIPP, was shifted relative to the carboxylic acid moiety of TIPP. The delta-receptor affinities of the TIP-D/L-Asx/Glx derivatives were found to be influenced mainly by the position of the carboxylic acid function rather than the stereochemistry of the C-terminal residue. TIP(P)-D/L-Lys(Ac)-OH derivatives exhibited moderate delta-receptor affinity (K(i)(delta) = 16-28 nM). The most potent compounds found in the extended TIP(P) series were TIPP-D-Gln-OH and TIP-D-Gln-OH (K(i)(delta) = 5 nM) which had similar affinities to TIPP.     

Moving to a Continuing Care Retirement Community: Occupations in the Therapeutic Landscape Process

The process of transitioning into, and living in, a retirement community can be usefully examined with the concept of ‘therapeutic landscapes.’ While underutilized in anthropology and gerontology, the concept offers a combination of geographical and cultural views on the place and well-being relationship. The inclusion of an occupational science perspective, wherein occupations (or everyday activities of meaning) are seen as a crucial part of the person-place relationship, should enhance the therapeutic landscape perspective of older persons and their retirement communities. We present a case study analysis that attempts to combine these perspectives and examine the role of occupation in the lives of older people who moved to a Continuing Care Retirement Community (CCRC). 116 movers completed pre- and post-move questionnaires about their levels of engagement in 20 activities. Frequency distributions, paired t-tests, and logistic regression analyses performed on the data indicate that while overall levels of activity did not change from pre- to post-move, patterns of engagement did change in the course of the move to the CCRC. Some social and cultural activities (e.g., parties, concerts, movies, meetings) increased in frequency, and some maintenance chores (e.g., grocery shopping, housekeeping) and communication (email) decreased in frequency. Moreover, total activity engagement after the move was associated with residential satisfaction in the CCRC. Even with their limitations, the data and analytical findings suggest that occupations are an important part of the CCRC therapeutic landscape process.     

Localization of immunoreactive cholecystokinin precursor to amacrine cells and bipolar cells of the macaque monkey retina

We used antisera that recognized precursors of the neuropeptide cholecystokinin extended at the carboxyl terminus in an immunocytochemical study of the macaque retina. A subpopulation of bipolar cells with long, obliquely oriented dendrites was labeled. Their axons terminated exclusively in the fifth stratum of the inner plexiform layer, where they contacted processes of amacrine and ganglion cells. Based on their morphology, these cells appeared to be the type that contacts short-wavelength cones selectively. Two types of amacrine cells were also labeled, and processes from both types formed dense plexuses in the second and fourth strata of the inner plexiform layer. The majority of their synaptic connections were with other amacrine cells, but they had more contacts with bipolar cell axons and retinal ganglion cell dendrites than any other peptidergic cells in the macaque retina. We studied extracts of macaque retina with gel-filtration chromatography and radioimmunoassays to confirm our immunohistochemical results. We found cholecystokinin octapeptide and other immunoreactive forms that were amidated at their carboxyl termini and were therefore likely to be biologically active. Unlike most other regions of the CNS, however, the retina had relatively low concentrations of amidated forms, and forms with extended carboxyl termini that are presumably their precursors were far more abundant. These findings suggest that the rate of cholecystokinin synthesis in the retina is quite high, as we would expect if the peptide were found in tonically active neurons.     

CT patterns of intracranial hemorrhage complicating thrombolytic therapy for acute myocardial infarction

Computed tomographic (CT) patterns of intracranial hemorrhage (ICH) were determined in 1,696 patients undergoing thrombolytic therapy for acute myocardial infarction. ICH occurred at 33 sites in 0.77% of patients (n = 13). Thirty-six percent of hemorrhages (n = 12) were intraparenchymal, 33% (n = 11) were subdural, 24% (n = 8) were subarachnoid, and 6% (n = 2) were intraventricular. Eight-four percent (n = 26) of all nonventricular hemorrhages were supratentorial in location. The most common site of ICH was supratentorial and intraparenchymal (10 of 33). In 11 of the 13 patients with ICH, clinical symptoms occurred within 24 hours of the initiation of thrombolytic therapy. A fatal outcome resulted in three of the four patients who had clinical symptoms within 3.5 hours after beginning thrombolytic therapy. The CT findings of multiple intracranial bleeding sites, substantial mass effect with midline shift, and large-volume intraparenchymal hematomas were associated with increased mortality. ICH associated with thrombolytic therapy for acute myocardial infarction has a grave prognosis, with 62% of patients dying during hospitalization.     

Clinical characteristics and outcome of current standard management of central retinal artery occlusion

Background: To investigate the visual outcomes in acute central retinal artery occlusion (CRAO) with current standard therapy at two university teaching hospitals. Methods: Retrospective analysis of two cohorts of CRAO patients from John Hopkins Hospital (JHH; USA), and Flinders Medical Centre (FMC; Australia), treated with current standard therapy. The outcome measures were visual acuity, and subsequent ocular and systemic ischaemic events. Results: The mean follow‐up period was 11.2 ± 13.1 months in the JHH cohort and 35.4 ± 34.9 months in the FMC cohort. The frequency distribution of vascular risk factors and the incidence of subsequent ischaemic events were similar for the patients from both institutions. All patients from JHH were treated as inpatients, whereas 79% of patients from FMC were treated as outpatients. More patients in the JHH cohort underwent paracentesis, ocular massage or were treated with intraocular hypotensive agents (76%) than in the FMC cohort (26%); however, there was no significant difference in visual outcome between the two cohorts (P = 0.114). Conclusion: Despite differences in management of CRAO between two institutions in different countries, visual outcomes were similar. This suggests a lack of efficacy of current standard treatment in acute CRAO.     

黄柏及中成药中小檗碱和巴马亭的高效液相色谱法测定

本文以正相高效液相色谱法,用窗口图解技术对色谱条件进行了优化。对黄柏及其中成药中的有效成分——小檗碱、巴马亭的提取、测定条件、标准曲线进行了研究。并对两种含黄柏的中成药样品进行了分析。其中小檗碱的回收率均在97%以上,巴马亭的回收率均在96%以上。     

安宫牛黄丸中小檗碱的HPLC法测定

本文报道用HPLC法测定黄连及含黄连中成药安宫牛黄丸中小檗碱型生物碱。实验结果表明选用硅胶柱为固定相,以醋酸乙酯—甲酸—乙醇(15:3:2)为流动相,能使样品中四种小檗碱型的生物碱获得最佳分离。用此法测得不同厂家生产的安宫牛黄丸中盐酸小檗碱的含量为0.331～0.456%,平均回收率为97.23%,变异系数为1.2%。