Night shift paralysis

12% of night nurses surveyed claimed to have suffered from a totally incapacitating paralysis that may be related to sleep paralysis, and contribute to impaired levels of safety on the night shift. The incidence of this paralysis is shown to be age-related, largely confined to the early hours of the morning, and to increase over consecutive night shifts.     

Night shift paralysis

Summary 12% of night nurses surveyed claimed to have suffered from a totally incapacitating paralysis that may be related to sleep paralysis, and contribute to impaired levels of safety on the night shift. The incidence of this paralysis is shown to be age-related, largely confined to the early hours of the morning, and to increase over consecutive night shifts.Acknowledgments. We wish to dedicate this paper to Professor Dr Günther Hildebrandt, Director of the Institut für Arbeitsphysiologie und Rehabilitationsforschung, University of Marburg/Lahn in honor of his 60th birthday. We also wish to thank the Nursing Officers and nurses concerned for their help in this study.     

Approach to a quantitative differentiation between the respiratory effects evoked from the lung stretch and the lung deflation receptors during thoracic compression

Zusammenfassung Die beiden Annahmen, dass sich bei Thoraxkompression die Verminderung der Impulssequenz der Lungendehnungsrezeptoren analog zum Lungenentdehnungsreflex auswirke, und dass sich dessen inspiratorische Atmungseffekte zu jenen des Lungenkollapsreflexes addieren, erscheinen gerechtfertigt. Diese Annahmen ermöglichen eine quantitative Differenzierung zwischen dem respiratorischen Einfluss der Lungendehnungs-und Lungenkollapsrezeptoren bei Thoraxkompression. Damit können die auf die Erregung der Lungenkollapsrezeptoren zu beziehenden Atmungsveränderungen (f,I/E) erstmals isoliert und quantitativ dargestellt werden.

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Presented at the 2nd Meeting of the Swiss Physiological Society, Zürich, 8 November 1969.     

Lipid and phospholipid content and fatty acid composition of the chick lung during embryonic development

Summary The evolution of total phospholipid, phosphatidylcholine and phosphatidylethanolamine content of chick lung during embryonic development is in good agreement with morphological data. Saturated fatty acids are predominant. A sex-linked difference is observed in the evolution of phosphatidylcholine.     

Why do patients with respiratory muscle paralysis require artificial hyperventilation?

Summary The primary reason for the need of hyperventilation in patients with respiratory paralysis is the insufficiency of the inhibitory Hering-Breuer reflex. The artificial distension of the lungs with normal tidal volume cannot inhibit the respiratory centre in contrast to the normal state.     

Lipid and phospholipid content and fatty acid composition of the chick lung during embryonic development.

The evolution of total phospholipid, phosphatidylcholine and phosphatidylethanolamine content of chick lung during embryonic development is in good agreement with morphological data. Saturated fatty acids are predominant. A sex-linked difference is observed in the evolution of phosphatidylcholine.     

Why do patients with respiratory muscle paralysis require artificial hyperventilation?

The primary reason for the need of hyperventilation in patients with respiratory paralysis is the insufficiency of the inhibitory Hering-Breuer reflex. The artificial distension of the lungs with normal tidal volume cannot inhibit the respiratory centre in contrast to the normal state.     

Mast cells in nerves affected with fowl paralysis (marek's disease)

Zusammenfassung Bei der spontanen Marekschen Hühnerlähmung, die durch Ödembildung und Ablagerung von Mucopolysacchariden und Collagen zwischen den Nervenfasern gekennzeichnet ist, erhöht sich auch die Anzahl der Mastzellen bedeutend. Es zeigt sich, dass Nerven, die eine neoplastische Infiltration mit primitiven lymphoiden Zellen aufweisen, weniger Mastzellen als gesunde enthalten. Zur Identifizierung der Mastzellen wurde auch das Elektronenmikroskop verwendet.     

Erythropoietin modulates the neural control of hypoxic ventilation

Numerous factors involved in general homeostasis are able to modulate ventilation. Classically, this comprises several kind of molecules, including neurotransmitters and steroids that are necessary for fine tuning ventilation under different conditions such as sleep, exercise, and acclimatization to high altitude. Recently, however, we have found that erythropoietin (Epo), the main regulator of red blood cell production, influences both central (brainstem) and peripheral (carotid bodies) respiratory centers when the organism is exposed to hypoxic conditions. Here, we summarize the effect of Epo on the respiratory control in mammals and highlight the potential implication of Epo in the ventilatory acclimatization to high altitude, as well as in the several respiratory sickness and syndromes occurring at low and high altitude. (Part of a multi-author review.)     

Hornet ventilation noise: Rhythm and energy content

Summary A new technique is used to measure the hornet's wing movement. It enables one to measure precisely the frequency of this movement, even in the presence of spurious noise. This autocorrelation technique revealed that the hornet's wing stroke is divided into 3 smaller strokes when they are tired. The energy content in each stage can be measured using the autocorrelator.     

人工关节材料的研究与展望

本文综述了国内外人工关节材料的主要研究现状及发展,并从材料科学与生命科学出发,提出了新型人工关节材料的设想与展望。     

中国人造金刚石工业迅猛崛起形势喜人

本文回顾了自古代人发现天然金刚石以来,人造金刚石的发展历程,及其在我国的迅猛发展,目前产量已居世界首位。进入２０世纪末,人造金刚石新品种不断涌现,ＣＶＤ、卡邦、世界首颗超厘米级Ｃ６０单晶也研制成功。     

基于整数线性规划的智能规划研究

整数线性规划是一种表示和求解智能规划问题的重要方法,本文较全面地介绍了近十年来国内外学者的相关研究工作,包括在智能规划中应用整数线性规划技术的重要方面、发展现状以及存在的问题,重点介绍了用整数线性规划求解智能规划问题的各种方法,旨在让关注该领域的学者能够快速地对这一领域有较为全面的了解,最后公开几个未解决的问题。     

毒死蜱完全抗原的合成与表征

在碱性条件下将毒死蜱原药与3-巯基丙酸反应,得到毒死蜱半抗原(O,O二乙基-O-[3,5一二氯-6-(2-羧乙基)硫代-2-吡啶基]硫代磷酸酯),采用活泼酯法将生成的半抗原与牛血清白蛋白(BSA)偶联,制备完全抗原.红外光谱、气相色谱-质谱联用仪及紫外光谱测试结果表明,所合成的物质均为目标产物.本方法简便易行,为利用免疫传感器快速检测有机磷农药毒死蜱残留量解决了一个关键技术问题.