PubMed Health⌕ Search

Biomedical subjects

X Song

Publications and source records attributed to X Song.

At least 145 records · Page 8Linked to original sources
PubMed1995

Reduction of metabolic rate and thermoregulation during daily torpor.

Physiological mechanisms causing reduction of metabolic rate during torpor in heterothermic endotherms are controversial. The original view that metabolic rate is reduced below the basal metabolic rate because the lowered body temperature reduces tissue metabolism has been challenged by a recent hypothesis which claims that metabolic rate during torpor is actively downregulated and is a function of the differential between body temperature and ambient temperature, rather than body temperature per se. In the present study, both the steady-state metabolic rate and body temperature of torpid stripe-faced dunnarts, Sminthopsis macroura (Dasyuridae: Marsupialia), showed two clearly different phases in response to change of air temperature. At air temperatures between 14 and 30 degrees C, metabolic rate and body temperature decreased with air temperature, and metabolic rate showed an exponential relationship with body temperature (r2 = 0.74). The Q10 for metabolic rate was between 2 and 3 over the body temperature range of 16 to 32 degrees C. The difference between body temperature and air temperature over this temperature range did not change significantly, and the metabolic rate was not related to the difference between body temperature and air temperature (P = 0.35). However, the apparent conductance decreased with air temperature. At air temperatures below 14 degrees C, metabolic rate increased linearly with the decrease of air temperature (r2 = 0.58) and body temperature was maintained above 16 degrees C, largely independent of air temperature. Over this air temperature range, metabolic rate was positively correlated with the difference between body temperature and air temperature (r2 = 0.61). Nevertheless, the Q10 for metabolic rate between normothermic and torpid thermoregulating animals at the same air temperature was also in the range of 2-3.(ABSTRACT TRUNCATED AT 250 WORDS)

Animals↗
PubMed1995

Hormone replacement therapy may reduce the return of endogenous lead from bone to the circulation.

Hormone replacement therapy (HRT) in postmenopausal women suppresses the increase in bone resorption expected as circulating levels of endogenous estrogen decline. We tested the hypothesis that bone lead content might remain elevated in women on HRT. Fifty six women who at recruitment were on average 35 years postmenopausal were placed on calcium supplementation. Six months later 33 of these women were prescribed either low dose or moderate dose hormone replacement in addition to the calcium supplementation. After approximately 4 years of hormone replacement, lead content was measured at the tibia and calcaneus by in vivo fluorescence excitation, and lead concentrations were measured in serum, whole blood, and urine. Women not taking hormones had significantly lower lead concentrations in cortical bone compared to all women on HRT (p = 0.007). Tibia lead content (mean +/- SD) for women on calcium only was 11.13 +/- 6.22 microgram/g bone mineral. For women on HRT, tibia bone lead was 19.37 +/- 8.62 micrograms/g bone mineral on low-dose HRT and 16.87 +/- 11.68 micrograms/g bone mineral on moderate-dose HRT. There were no differences between groups for lead concentrations measured in trabecular bone, whole blood, serum or urine. Hormone replacement maintains cortical bone lead content. In women not on HRT, there will be a perimenopausal release of lead from bone.

Bone and Bones↗
PubMed1995

[An observation of protective effect of acupuncture on the cardiac function and anti-hemorrhagic shock].

This paper reports the study of the effect of the cardiac function and arterial pressure on rabbits with hemorrhagic shock by electroacupuncture Neiguan point. The result showed that PEP was shortened, ET was lengthened, SV, CO and Map were raised by needling Neiguan and the each index was significant difference (P < 0.001). Above results indicated that needling may strengthen myocardial contractile force, protect the cardial pump function, raise the blood pressure, play a positive role during anti-hemorrhagic shock.

Animals↗
PubMed1995

[Vena iliaca externa thrombosis after open operation of the bladder and prostate].

Since 1986, we have performed total cystectomy or partial cystectomy with ureteroneocystostomy in 64 cases and prostatectomy in 182 cases. 5 cases developed vena iliaca external thrombosis (VIET) or thrombophlebitis postoperatively. Three of them recovered after treatment, and 2 died of pulmonary embolism 7 and 16 days after operations. VIET is a very serious complication. Once develops pulmonary embolism, the patient may die soon. We suggested that patients be encouraged to increase limbs activities, be given medicines of antilipemic and antiatherogenic preoperatively. And during the surgical operation, patients' blood pressure should be kept steady, and hypopietic shock should be avoided as long as possible. The vena iliaca external should never be constricted when a deep hook is used for exposure or gauze is used to stop bleeding. After operation, the patient should be encouraged to exercise on bed or around bed as early as possible, so as to increase venous flow. The veins of lower limbs should be avoided by using infusion. Styptic should not be applied abusively. Infusion of dextranum-40 and orally taking of persantinum may also be used to prevent this kind of complication.

Aged↗
PubMed1995

280 cases of hyperplasia of mammary gland treated by ru he chong ji.

280 patients with hyperplasia of mammary gland were treated by Ru He Chong Ji, a breast nodule granular dissolvable agent. Thirty-one were cured, 117 markedly improved, 119 improved, and 13 showed no change. The rate of cure and marked effectiveness was 52.86%, with a total effective rate of 95.36%. The agent is also effective for treatment of depression of liver-energy and menoxenia.

Adolescent↗
PubMed1994

[On the Arabian imperial medicine--wu ming yi].

Wu ming yi was an Arabian medicine imported into China during the 10th century, which was introduced over briefly by the ancient works of the traditional Chinese medicine. according to the pronunciation contrast between the Arabic and Chinese languages, as well as the records in the Arabian medical documents, this thesis points out "wu ming yi" was the transliteration of "mummy" from the Arabic. "Wu ming yi" was a kind of organic mineral produced in Egypt and Yemen, which was the anticorrosive paint for making dry corpses (mummy), hence the tille "mummy". The form and properties, the medical treatment and the way to extract "mummy" told by the Arabian books conformed to the character of "wu ming yi" recorded by the Chinese books.

China↗
PubMed1993

An experimental study on acupuncture anti-hemorrhagic shock.

The effect of acupuncture at Neiguan (P 6) on regulating hemorrhagic shock in 90 rabbits was observed. All the results suggested that acupuncture at Neiguan could raise blood pressure, protect cardiac pump function, correct the disturbance of secretion and metabolism of humoral factors, reduce blood adhesion to normal level and thus achieve anti-hemorrhagic shock. This study has provided scientific basis for expounding the mechanism of acupuncture in anti-shock.

Acupuncture Therapy↗
PubMed1992

Volatile N-nitrosamines in salted fish samples from high- and low-risk areas for NPC in China.

Four carcinogenic volatile nitrosamines (N-dimethylnitrosamine, NDMA; N-diethylnitrosamine, NDEA; N-nitrosopyrroline, NPYR; and N-nirosopiperilidine, NPIP) were screened in twenty specimens of salted fish collected from areas in China with different nasopharyngeal carcinoma (NPC) mortality rates. The highest NDMA, NDEA and total N-nitrosamine contents (322.92, 50.27 and 373.19 micrograms/kg, respectively) were found in the samples from Sihui, one of the areas with highest NPC mortality. The lowest contents (12.64, 7.65 and 20.29 micrograms/kg, respectively) were seen in the samples from Shanghai, the area with the lowest mortality from NPC in the study. These results confirm that there are appreciable levels of nitrosamines in the salted fishes consumed by residents in high-risk areas of NPC in China.

Animals↗
PubMed1992

[Influence of moxibustion on TXA2 and PGI2 in plasma of rat infected epidemic hemorrhagic fever virus (EHFV)].

In this paper, the model of rat infected EHFV was made and the influence of moxibustion on TXA2 and PGI2 in its plasma was observed. The results show that the content of TXA2 increased and PGI2 decreased in rat significantly after the abdominal inoculation of EHFV, and the content of TXA2 decreased and PGI2 increased markedly in rat infected EHFV to normal level after treatment with moxibustion, suggesting that the regulative function of moxibustion on TXA2 and PGI2 is one of its nerve-endocrine-immune regulations to the body, and there is an important significance. This study provides an important reference for mechanism exploration of moxibustion preventing and treating EHF.

6-Ketoprostaglandin F1 alpha↗
PubMed1992

[Molecular cytogenetic study of an extra small chromosome].

An extra small chromosome was observed in a three-generation family. Eight members of this family were involved, but their phenotypes were normal. Molecular cytogenetic study was carried out, using cytogenetic methods and chromosome in situ hybridization with 3H-labelled rDNA probe. The results showed that this chromosome was from the short arm of chromosome of D/G group. The origin and genetic effects of this chromosome and fertility of the carriers were also discussed were also discussed briefly.

Adult↗
PubMed1992

Indoor air pollution and pulmonary function in children.

Pulmonary function in winter time in 1,343 school children aged 10-13 years was measured in four cities located in northern and southern part of China. The results showed that FVC, FEV1, PEF, V75, V50 and V25 in children living in homes with coal stoves were decreased by 1.5-10.7% compared with children living in homes with gas or LPG stoves in Chengde and Shanghai. In contrast to this, no significant difference in pulmonary function was found in Shenyang and Wuhan. It suggested that this phenomenon was related to indoor air pollution, and partly related to passive smoking or outdoor air pollution.

Air Pollution, Indoor↗