三叶鼠尾草中小红参醌丙的结构

从三叶鼠尾草(Salvia trijuga Diels)的干燥根中分得9种结晶性成分,经鉴定为铁锈醇(ferruginol)、柳杉酚(sugiol)及系列高级脂肪酸三十四酸、三十酸、二十八酸、十六酸,另两种酸分别为对羟苯甲酸及氨基酸(dl-homoserine),晶Ⅰ为一新化合物,定名为小红参醌丙(trijuganone C),经光谱分析及化学反应推定其结构为15,16-二氢丹参酸甲酯。     

Benign paroxysmal positional nystagmus in hospitalized subjects receiving ototoxic medications.

OBJECTIVE: To investigate the occurrence of benign paroxysmal positional nystagmus in subjects undergoing treatment with potentially ototoxic medications. STUDY DESIGN: Prospective and retrospective record reviews. SETTING: Tertiary referral neurotology clinic; clinical research and technology center. SUBJECTS: Ninety-nine hospitalized subjects undergoing treatment of infectious disease or carcinoma with potentially ototoxic medications. INTERVENTIONS: Records review, tests of vestibular function. MAIN OUTCOME MEASURE: Results of Hallpike positional tests for benign paroxysmal positional nystagmus (electro-oculography). RESULTS: Forty-one (41%) of 99 subjects were female and 58 (59%) were male. Age range was 15 to 73 years (mean, 47 years). Forty-nine (50%) of 99 subjects had an unequivocally positive Hallpike test for benign paroxysmal positional nystagmus in one or both ears. The occurrence of benign paroxysmal positional nystagmus in the Hallpike-positive population was distributed equally across age decades. Of the 49 subjects with benign paroxysmal positional nystagmus, 22 (44%) were female and 27 (56%) were male. CONCLUSIONS: Benign paroxysmal positional nystagmus is the most common cause of vertigo in the general population, including subjects receiving ototoxic drugs. Complaints of vertigo in subjects receiving ototoxic drugs therefore may or may not indicate onset of ototoxicity. Occurrence of benign paroxysmal positional nystagmus in subjects receiving ototoxic drugs was independent of gender or age. The high occurrence rate of benign paroxysmal positional nystagmus in subjects receiving potentially ototoxic medications is consistent with the observation that benign paroxysmal positional nystagmus occurs in combination with many pathologic conditions. Benign paroxysmal positional nystagmus presenting in subjects receiving ototoxic drugs may complicate the clinical identification of ototoxicity and obfuscate clinical decision-making processes.     

头序木叶中三萜化学成分的研究

从头序木（ＡｒａｌｉａｄａｓｙｐｈｙｌａＭｉｑ）叶中分离到６个三萜化合物，用化学方法和波谱（ＵＶ，ＩＲ，ＭＳ，１ＨＮＭＲ，１３ＣＮＭＲ，１３ＣＤＥＰＴ，ＨＭＱＣ，ＨＭＢＣ）分析，确定其中４种化合物的结构，分别为齐墩果酸（Ｉ），１６β羟基１８βＨ齐墩果酸（Ｉ），齐墩果酸２８ＯβＤ吡喃葡萄糖甙（ＩＩ）和１６β羟基１８βＨ齐墩果酸２８ＯβＤ吡喃葡萄糖甙（ＩＶ）。用ＮＯＥＳＹ谱确定化合物Ｉ的立体构型。以上４个化合物均为首次从该植物中分离到，化合物ＩＶ为新化合物。     

ASSESSMENT OF LINEAR GROWTH OF CHILDREN WITH CEREBRAL PALSY: USE OF ALTERNATIVE MEASURES TO HEIGHT OR LENGTH

Various linear measurements were made of 100 children with cerebral palsy to evaluate the effects of various factors on growth, and to investigate the use of alternative measurements to height or recumbent length. Linear growth was more retarded in children with spastic quadriplegia than in those with less widespread spasticity, and there was a tendency for the older children to be more growth-retarded. Upper-arm and lower-leg lengths provided useful information about linear growth. Growth charts using these alternative measurements have been developed which can be used to assess linear growth of children with cerebral palsy when it is difficult or impossible to measure height or recumbent length because of joint contractures. These charts should improve the assessment of the nutritional status of children with cerebral palsy.