Sample records for 氧 (oxygen)

Sample records 1 - 20 shown. Select sample records:


Transmission of oxygen isotope signals of precipitation-soil water-drip water and its implications in Liangfeng Cave of Guizhou,China

Luo, WeiJun; Wang, ShiJie

[英文摘要]: According to systemically monitoring results of oxygen(hydrogen) isotope compositions of precipita-tion,soil waters,soil CO2,cave drip waters and their corresponding speleothems in Liangfeng Cave(LFC) in Guizhou Province, Southwest China, it is found that local precipitation is the ma...

DRIVER (Chinese)


Transient hypoxia enhances the frequency of dihydrofolate reductase gene amplification in Chinese hamster ovary cells.

Rice, G C; Schimke, R T; Hoy, C

Exposure of Chinese hamster cells to reduced oxygen partial pressure results in a marked enhancement in the frequency of methotrexate resistance and dihydrofolate reductase gene amplification. The frequency of enhanced resistance is a function of the length of exposure to hypoxic conditions and the ...

DRIVER (Chinese)


The role of nickel and nickel-mediated reactive oxygen species in the mechanism of nickel carcinogenesis.

Klein, C B; Huang, X; Frenkel, K; Zhuang, Z; Costa, M

Increasing evidence demonstrates the reactive oxygen species (ROS) are implicated in metal carcinogenesis. Exposure of cultured Chinese hamster ovary (CHO) cells to several nickel compounds, i.e. NiS, Ni3S2, NiO (black and green), and NiCl2 has been shown to increase oxidation of 2',7-dichlorofluore...

DRIVER (Chinese)


The lung function, hemoglobin concentration and arterial oxygen saturation among 9-10 year old native Tibetan and Han Chinese children living at 3700meters and 4300meters above sea level in Tibet


Aim: Chronic mountain sickness (CMS) is more common among Han Chinese immigrants who have immigrated from inland China (from low altitude to high altitude Tibet) than among native Tibetans living at the same altitude. The prevalence of CMS is higher in inhabitants who live at a higher altitude comp...

DRIVER (Chinese)


The effect of premedication on oxygen saturation during the post-premedication period in 20 Chinese children undergoing elective surgery

Jones, RDM; Visram, AR; Kornberg, JP; Irwin, MG; Roulson, CJ; Gunawardene, WMS

Peri-operative continuous pulse oximetric data were studied in healthy Chinese children randomly allocated to receive either pethidine 1 mg kg-1 and atropine 0.02 mg kg-1 intramuscularly 90 min prior to surgery (n = 10), or midazolam 0.5 mg kg-1 and atropine 0.02 mg kg-1 orally, 120 min before surge...

DRIVER (Chinese)


On Microvascular Inflammation and Intestinal Leakage in Radiation Enteropathy

Röme, Andrada

Gastrointestinal tract damage is an insidious feature in patients undergoing radiotherapy. Microvascular inflammation, including leukocyte and platelet recruitment as well as epithelial barrier dysfunction, are considered to constitute key components in the pathophysiology of radiation-induced enter...

DRIVER (Chinese)


Exercise capacity, arterial oxygen saturation, hemoglobin concentration, and physical activity :A cross-sectional study of selected factors associated with the adaptation to high altitude, a comparison of 9-10 year old native Tibetan and Chinese immigrants in Lhasa, Tibet

Bianba, Bianba

Aim: It is well known that capacity for exercise performance is progressively limited with increasing altitude. Furthermore, the maximal exercise capacity is an indicator of the capacity of humans to adapt and acclimatize to high altitude. Chronic Mountain Sickness (CMS) is associated with inadequa...

DRIVER (Chinese)


Evidence for reactive oxygen species inducing mutations in mammalian cells.

Lee, C Q; Hsie, A W; Katz, D S; Recio, L; Wagner, M; Schenley, R L

We have studied the mutagenicity (by selecting for mutants resistant to 6-thioguanine) and cytotoxicity (by determining cellular cloning efficiency) of physical and chemical agents in Chinese hamster ovary (CHO) cells, clone CHO-K1-BH4 (K1-BH4), and its radiation-hypersensitive transformant, AS52. A...

DRIVER (Chinese)


ESR studies of O2 uptake by Chinese hamster ovary cells during the cell cycle.

Lukiewicz, S; Lai, C S; Hyde, J S; Hopwood, L E

Magnetic interactions between dissolved oxygen and nitroxide radical spin probes lead to broadening of the ESR lines. We have used a closed-chamber method based on this property to determine the maximum rate of O2 uptake per cell (Vmax per cell) in cultured mammalian cells. A suitable spin probe and...

DRIVER (Chinese)


Differential protein expression profiles in anterior gills of Eriocheir sinensis during acclimation to cadmium.

Silvestre, Frédéric; Dierick, Jean-François; Dumont, Valéry; Dieu, Marc; Raes, Martine; Devos, Pierre

Using a proteomic approach, we characterized different protein expression profiles in anterior gills of the Chinese mitten crab, Eriocheir sinensis, after cadmium (Cd) exposure. Two experimental conditions were tested: (i) an acute exposure (i.e. 500 microg Cd l(-1) for 3 days) for which physiologic...

DRIVER (Chinese)


Clinical effectiveness of treatment with hyperbaric oxygen for neonatal hypoxic-ischaemic encephalopathy: systematic review of Chinese literature

Liu, Zulian; Meads, Catherine; Xiong, Tengbin

Objectives To investigate the clinical effectiveness of treatment with hyperbaric oxygen for neonates with hypoxic-ischaemic encephalopathy. This treatment is frequently used in China but much less often in the West.

DRIVER (Chinese)


Chinese hamster ovary cell viability on hydrogen and oxygen terminated nano- and microcrystalline diamond surfaces


DRIVER (Chinese)


Characterization and quantification of ammonia-oxidizing archaea (AOA) and bacteria (AOB) in a nitrogen-removing reactor using T-RFLP and qPCR

Jin, Tao; Zhang, Tong; Yan, Qingmei

Using ammonia monooxygenase α-subunit (amoA) gene and 16S rRNA gene, the community structure and abundance of ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB) in a nitrogen-removing reactor, which was operated for five phases, were characterized and quantified by cloning, termina...

DRIVER (Chinese)


Bone turnover markers and prediction of bone loss in elderly women

Lenora, Janaka

Around 70,000 osteoporosis-related fractures occur in Sweden annually and approximately half of the women in western world will sustain a fragility fracture after the age of 50 years. Fracture preventive efforts require the identification of individuals who are at high risk. Biochemical markers of b...

DRIVER (Chinese)