化学

According to previous studies, the hosts —parasites immune interactions were investigated in rabbits following immunization with extracts from Ixodes sinensis basing on medical entomology, immunology, biochemistry, pathology and histochemistry and reported from the following eight fields

本研究在以往研究工作的基础上，首次选用我国江南地区具有重要医学和兽医学意义的优势蜱种：中华硬蜱的不同抗原对新西兰兔进行免疫接种，对宿主—寄生虫免疫相互作用从医学昆虫学、免疫学、生物化学、病理学、组织化学等不同方面进行研究，就以下8个方面首次进行报道。

Results showed that the extract ratioof the product was 0.09 %, and the relative contentsin the product were: juglone (5-hydroxy-l,4-naphthaoquinone) 96.42%, 1,4-Naphthalenedione0.70%; 7-Methoxy-1-tetralone 2.88%.

采用傅立叶红外FT-IR、气-质联用技术GC-MS及核磁共振氢谱~1H-NMR等分析产品的化学组成、化学结构及产品中胡桃醌的相对含量。

After HRP application to the rostral area (n=10), quite a number of labelled cells were distributed at the ventrolateral part of the nucleus of trapezoid body, the lateroventral periolivary nucleus and the retrotrapezoid nucleus. After HRP application to the caudal area (n=10), HRP labelled cells were mainly located at the lateral reticular nucleus and the ventral part of at the lateral paragigantocellular nucleus LPGi. After HRP application to the intermediate area (n=6), only 8HRP labelled cells were observed at the in 6rats. After HRP application to the control area (n=4), only 6HRP labelled cells were found at the rostral ventrolateral reticular nucleus.

大鼠延髓腹外侧表面的头端化学感受区表面敷贴辣根过氧化物酶后，在延髓斜方体核、外周橄榄腹外侧核和斜方体后核均有HRP标记细胞存在；于尾端化学感受区表面敷贴HRP后，在延髓的巨细胞旁外侧核、外侧网状核和舌下神经核有HRP标记细胞存在；于中间区表面敷贴HRP后，在6只大鼠的延髓内部区域仅观察到8个HRP标记细胞；于对照区敷贴HRP后，在4只大鼠的延髓内部区域仅观察到6个HRP标记细胞，散在地分布在头端腹外侧网状核。

Majuscula. Our researches were significant for the chemical taxanomy of Laurencia, and the exploition of the natural products from this seaweed in our country.

本文关于凹顶藻次生代谢产物的研究结果，进一步丰富了凹顶藻化学研究成果，特别是丰富了我国对于该属藻类的研究资料，同时提供了该属藻类的化学分类以及天然产物资源开发利用的参考。

Preliminary Tests for Chemical Components of Leucaena leucocephalaLam.

目的采用系统预试法对银合欢种子可能的化学成分进行预实验，初步探索银合欢种子的化学成分。

Guangxi Traditional Chinese Medical University ,Nanning 530001,ChinaAbstract:ObjectiveTo identify the chemical components of Leucaena leucocephala de Wit seeds using comprehensive preliminary tests.

目的采用系统预试法对银合欢种子可能的化学成分进行预实验，初步探索银合欢种子的化学成分。

The fractions of Ligroine and chloroform part of the the EtOH extraction were isolated and purified by column chromatography on silica gel and Sephadex LH 20 and recrystallization. Their structures were studied by using UV, IR, H-NMR, 13C-NMR, and MS, techniques.

运用硅胶、Sephadex LH-20柱色谱等方法对芫花乙醇提取物的石油醚及氯仿萃取部分进行化学成分研究，并利用UV、IR、1HNMR、13CNMR、MS等光谱技术鉴定其化学结构。

For better understanding the relationship between chemistry composes and activities, and promoting the competitive strength, 16 benzene derivatives (three new compounds and a novel skeleton) were isolated from Ligularia veitchiana which were collected in Hubei province.

为了更好的了解植物药中的化学成分及药效关系，提升我国植物药在国际市场的竞争力，我们对采自湖北的离舌橐吾进行了系统的化学成分分离，得到16个苯的衍生物，其中，新化合物三个，新骨架化合物一个。

The volatile oils in Ligusticum chuanxiong and Angelica sinensis were analyzed using gas chromatography-mass spectrometry, and the class and content of the volatile oils in the two medicinal materials were compared.

川芎和当归都是最常用的中药材，它们的药理作用和化学成分具有很大的类似性。川芎和当归中的化学成分主要为挥发性成分和水溶性成分两大部分。

OBJECTIVE:Study on the chemical constituents of essential oil from the leaves of Litsea mollia Hemsl.

目的：研究毛叶木姜子叶挥发油的化学成分，并与其果油的化学成分作比较。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。