Objective： To investigate the masseter inhibitory tension-type headache （TTH）. Methods： MIR was studied in 21 sex matched to the study cohort. Median age of patients was reflex （MIR） and its eventual changes in ...Objective： To investigate the masseter inhibitory tension-type headache （TTH）. Methods： MIR was studied in 21 sex matched to the study cohort. Median age of patients was reflex （MIR） and its eventual changes in patients with episodic patients with episodic TTH and 30 healthy subjects, with age and 17.0 years （ranged 16-49 years）, median duration of disease 12 months （1-5 years）, and median frequency of headache 7.5 d per month. Results： The second period of suppression （$2） of MIR was reduced in intensity and duration in 10% of controls and 66.7% （confidence interval （CI） 45.3%-85%; P〈0.05） of patients with episodic TTH （X2=74.9; P〈0.001）. In 3 （14.3%） of patients with episodic TTH, S2 was completely absent. No significant correlation between the duration of disease and headache frequency was found. Conclusion： Our results confirm the link between episodic TTH and reduction or absence of S2. Teenage patients with episodic TTH may exhibit marked pathological changes in S2 in contrast to older individuals.展开更多
紧张型头痛(tension type headache,TTH)是最常见的头痛疾病,全球的每年患病率为26%~38%,大多数紧张型头痛为发作性,且具有自限性。目前,TTH主要的发病机制涉及到外周机制、中枢机制及遗传机制等方面,本文将对TTH发病机制的相关文献做...紧张型头痛(tension type headache,TTH)是最常见的头痛疾病,全球的每年患病率为26%~38%,大多数紧张型头痛为发作性,且具有自限性。目前,TTH主要的发病机制涉及到外周机制、中枢机制及遗传机制等方面,本文将对TTH发病机制的相关文献做一综述。展开更多
One bioleaching bacterium, named as strain DXS, was isolated from acid mine drainages （AMDs） of Dongxiangshan Mine of Hami, Xinjiang Province, China. The strain DXS is gram-negative and rod-shaped with a size of （0...One bioleaching bacterium, named as strain DXS, was isolated from acid mine drainages （AMDs） of Dongxiangshan Mine of Hami, Xinjiang Province, China. The strain DXS is gram-negative and rod-shaped with a size of （0.40±0.05） μm x （1.3±0.5） μm. The optimal temperature and pH for growth are 30 ℃ and pH 2.0, respectively. It can grow autotrophically by using ferrous iron, elemental sulfur and NaS203 as sole energy sources. In the phylogenetic tree, strain DXS has similarity with Acidithiobacillus ferrooxidans type strain ATCC 23270 with 99.57% sequence similarity. The cloning and sequencing of Iro protein gene （iro） and tetrathionate hydrolase gene （tth） reveal that strain DXS is completely identical in iro gene sequence to A. ferrooxidans LY （DQ166841）, and almost identical in tth gene sequene to .4. ferrooxidans （AB259312） （only two nucleotides change）. The bioleaching experiments of marmatite and pyrite reveal that the leached zinc and iron concentrations reach 3.01 g/L and 2.75 g/L, respectively. The strain has a well potential application in industry bioleaching.展开更多
文摘Objective： To investigate the masseter inhibitory tension-type headache （TTH）. Methods： MIR was studied in 21 sex matched to the study cohort. Median age of patients was reflex （MIR） and its eventual changes in patients with episodic patients with episodic TTH and 30 healthy subjects, with age and 17.0 years （ranged 16-49 years）, median duration of disease 12 months （1-5 years）, and median frequency of headache 7.5 d per month. Results： The second period of suppression （$2） of MIR was reduced in intensity and duration in 10% of controls and 66.7% （confidence interval （CI） 45.3%-85%; P〈0.05） of patients with episodic TTH （X2=74.9; P〈0.001）. In 3 （14.3%） of patients with episodic TTH, S2 was completely absent. No significant correlation between the duration of disease and headache frequency was found. Conclusion： Our results confirm the link between episodic TTH and reduction or absence of S2. Teenage patients with episodic TTH may exhibit marked pathological changes in S2 in contrast to older individuals.
基金Projects(50974140, 50674101) supported by the National Natural Science Foundation of ChinaProject(2010CB630902) supported by the National Basic Research Program of China
文摘One bioleaching bacterium, named as strain DXS, was isolated from acid mine drainages （AMDs） of Dongxiangshan Mine of Hami, Xinjiang Province, China. The strain DXS is gram-negative and rod-shaped with a size of （0.40±0.05） μm x （1.3±0.5） μm. The optimal temperature and pH for growth are 30 ℃ and pH 2.0, respectively. It can grow autotrophically by using ferrous iron, elemental sulfur and NaS203 as sole energy sources. In the phylogenetic tree, strain DXS has similarity with Acidithiobacillus ferrooxidans type strain ATCC 23270 with 99.57% sequence similarity. The cloning and sequencing of Iro protein gene （iro） and tetrathionate hydrolase gene （tth） reveal that strain DXS is completely identical in iro gene sequence to A. ferrooxidans LY （DQ166841）, and almost identical in tth gene sequene to .4. ferrooxidans （AB259312） （only two nucleotides change）. The bioleaching experiments of marmatite and pyrite reveal that the leached zinc and iron concentrations reach 3.01 g/L and 2.75 g/L, respectively. The strain has a well potential application in industry bioleaching.
