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Biomedical subjects

W Li

Publications and source records attributed to W Li.

At least 793 records · Page 44Linked to original sources
PubMed1998

My personal idea on "seven reduction and eight boost" in plain question of inner canon.

Although ancient and contemporary scholars fail to reach an agreement on the explanation about "Qi-Sun and Ba-Yi", the following is the most acceptable. According to the medical books found in Ma-wang-dui Tombs, scholars, domestic and abroad, take the Taoist school as love-making and theory of Laozi as pornographic writings. Combining the Taoist theory with my own medical practics. I argue that "Qi-Sun and Ba-Yi" have a different meaning. Most explanations about "Qi-Sun and Ba-Yi" centre on "Qi"--seven and "Ba"--eight, the two numbers, instead of "Sun" and "Yi". Plain Questions points out the southern red colour connecting with the "heart" numbers 7--"Qi", while the "heart" is the most important organ. Once the heart was healthy, the body is at ease, thus, one can live longer. The eastern black colour connecting with the liver number 8--"Ba", so "Ba-Yi" means to strengthen the liver and kidney.

China↗
PubMed1998

[Intracardiac operations performed in beating heart through mini-thoracotomy in 34 patients].

OBJECTIVE: To introduce the technique of intracardiac operations performed in beating heart through mini-thoracotomy. METHOD: >From March 1995 to June 1997, intracardiac operations were performed in beating heart through right subaxillary anterolateral mini-thoracotomy with normothermic extracorporeal circulation in 34 patients. 16 patients had atrial septal defect, 14 ventricular septal defect, 2 mitral insufficiency, 1 right coronary artery-right ventricular fistula, and 1 Ebstein's anomaly. RESULT: The mean cardiopulmonary bypass time was 22.54 minutes. There were no embolism, arrhythmia and cerebral complications. Postoperative hospital stay was 8.0 +/- 2.2 days. All the patients had no heart murmur and residual shunt, and enjoyed a full range of physical activities in a follow-up of 2 to 26 months. CONCLUSION: Intracardiac operations performed in beating heart through right subaxillary anterolateral mini-thoracotomy appears to be less invasive, simple, safe and cosmetic.

Adolescent↗
PubMed1998

[Long-term follow-up study of postoperative revascularization in childhood moyamoya disease: results of 226 cases].

OBJECTIVE: To study the long-term results of 226 patients with moyamoya disease ased below 15 years and to report the modified method of extra-intracranial arterial anastomosis and encephalo-myo-arterio-syn-anastomosis, etc. METHOD: The mean follow-up period was 15.5 years (range 8 - 19 years). The results were obtained from the pre- and postoperative cerebral angiographic examination, MRI, CT, cerebrovascular Doppler ultrasonography, Glasgow Outcome Scale (GOS), intelligence quotient (IQ) as classified by Taft and neurological symptoms. RESULT: Of the 226 patients with childhood moyamoya disease, 64 (28%) recovered in completely, 69 (31%) in improved markedly, and 46 (20%) improved slightly. 43 patients (19%) had no changes and 4 (2%) died. The effective rate of the operation was 79%. CONCLUSION: The modified direct anastomosis and encephalo-myo-arterio-synagiosis played a role in this improvement by increasing CBF after the operation. A significant correlation is found between the postoperative effect and the stages of preoperative angiograms.

Adolescent↗
PubMed1998

[Effect of recombinant human growth hormone with total parenteral nutrition on albumin synthesis in patients with peritoneal sepsis].

OBJECTIVE: To investigate the effect of recombinant human growth hormone (rhGH) in combination with total parenteral nutrition (TPN) on albumin synthesis in patients with peritoneal sepsis. METHOD: 17 patients with peritoneal sepsis were divided randomly into two groups. The control group received TPN only for 7 days, and the GH group received both rhGH (12 U/d) and TPN for 7 days. The TPN scheme and other treatment were the same in the two groups. RESULT: Serum albumin, prealbumin, and transferrin concentration were increased in patients in the GH group (P < 0.01), but no apparent effect was observed in the control group (P > 0.05). CONCLUSION: In condition of serious peritoneal sepsis, TPN can not increase albumin, prealbumin, and transferrin synthesis alone, whereas rhGH in combination with TPN significantly increase the synthesis of visceral proteins.

Adolescent↗
PubMed1998

[Apoptosis in age-related macular degeneration].

OBJECTIVE: To examine the role of apoptosis in photoreceptor cell death in age-related macular degeneration. METHODS: 16 human eyes with age-related macular degeneration (ARMD) were studied by histopathology and TDT-mediated biotin-dUTP nick-end labeling (TUNEL) technique. RESULT: The characteristic DNA fragmentation of apoptosis was observed in scattered photoreceptor cells in 6 of 16 eyes. CONCLUSION: It is suggested that apoptosis be one of the important pathways of photoreceptor cell death in age-related macular degeneration.

Adult↗
PubMed1998

[An experimental study on effects of biomembrane on prevention of filtering bleb adhesion in trabeculectomy].

OBJECTIVE: The study was designed to investigate the effects of biomembrane on experimental trabeculectomy. METHODS: A biomembrane was implanted under the scleral flap and the conjunctival flap in trabeculectomy in one eye of rabbits, while the fellow eye of the same rabbit without biomembrane implantation was the control. RESULTS: (1) The wound healing of the procedure reached its peak at 2-3 weeks after surgery, while the absorption of the biomembrane began at 6 weeks after surgery, and there was no tight adhesion between the biomembrane and the scar tissue, thus the filtering fistula was prevented from obstruction. (2) From the 2nd to the 7th week after surgery, the percentage of existing functional bleb in the experimental group was significantly higher than that in the control group (P < 0.05). (3) From the 1st to the 5th postoperative week, the decreasing of intraocular pressure in the experimental group was significantly greater than that in the control group (P < 0.05). CONCLUSION: The use of biomembrane in trabeculectomy can prevent the adhesion of filtering bleb and decrease intraocular pressure more effectively, and this study can provide experimental reference for the clinical use of biomembrane.

Animals↗
PubMed1998

[Myopic regression after photorefractive keratectomy].

OBJECTIVE: To investigate myopic regression after excimer laser photorefractive keratectomy (PRK) in patients with myopia. METHODS: 103 eyes with regression (>or= -1.00 D) found in the follow-up for more than 1 year were included in this study. The preoperative spherical equivalent was -4.00 - -14.50 D (-8.72 +/- 2.65 D). Patients were divided into two groups: (1) moderate myopia (-4.00 - -7.90 D) and (2) high myopia (>or= -8.00 D). RESULTS: A significant positive correlation was found between regression and the extent of attempted correction, the rate of regression in high myopia group was 6.93% and that in moderate group, 1.17%. The rate of regression in older age group was higher than that in younger cases. (P < 0.01). Relatively severe haze under the corneal epithelium often accompanies the regression, and decrease of the dosage of topical corticosteroid application or its withdrawal because of the development of corticosteroid ocular hypertention could lead to the regression. The stability of the refraction is not related to the difference in sex. The regression is often accompanied by the increase in K value. CONCLUSION: The regression is significantly related to the extent of attempted correction, patients' age, corneal haze and topical application of corticosteroid.

Adrenal Cortex Hormones↗
PubMed1998

[The development of a myocardial infarction monitoring system].

In this paper, the author will discuss the system design of one portable myocardial infarction monitoring system which possesses the functions of the general arrhythmia monitoring and the alarm & emergency of acute myocardial infarction (AMI). This system also can provide accurate real time ECG signal parameters for clinic diagnosis.

Equipment Design↗
PubMed1998

[Preparation and characterization of monoclonal antibodies against Cryptosporidium parvum].

AIM: To develop and characterize the monoclonal antibodies(McAbs) against Cryptosporidium parvum (C. parvum). METHODS: BALB/c mice were immunized with purified oocyst antigens of C. parvum from human isolates and McAbs against C. parvum were prepared by using hybridoma technique. The characterization of McAbs was studied by means of indirect immunofluorescent assay (IFA) and Western blot analysis. RESULTS: Four clones of hybridoma cell lines secreting McAbs against oocyst antigens of C. parvum were obtained. The immunoglobulin subclasses of these four McAbs were identified as IgM (Z4C8,Z3D7) and IgG1(Z2B6,Z3D2) and their light chains were kappa chain. IFA results showed that three McAb (Z4C8, Z3D7 and Z3D2) conjugates produced a diffuse fluorescence in the Cryptosporidium sporozoites (CSP) and one (Z2B6) produced local fluorescence in the oocyst wall of C. parvum. Four McAbs could recognize 4 of 42 polypeptide antigen bands of CSP with molecular weights of 20.5 kDa, 33 kDa, 60.5 kDa and 95 kDa, among which both Z4C8 and Z3D7 could recognize 20.5 kDa band that was defined as a principal antigenic protein of CSP. CONCLUSION: These four McAbs possess their own characteristics of recognizing antigenic epitopes on CSP, but react specifically against antigens of C. parvum.

Animals↗
PubMed1998

[Studies on reduction of hexavalent chromium by fungi].

Several fungal strain, isolated from activated sludge, sewage and soil, were able to grow in the medium containing 300-500 mg/L K2Cr2O7, and strain BS-1 was capable of resistance to K2Cr2O7 up to 900 mg/L. After 4-6 d growing of the strain BS-1 and other 3 strains in the liquid medium added 200 mg/L K2Cr2O7, the Cr(VI) content of the medium disappeared completely. These strain were identified as Penicillium sp. BS-1, BS-3, Aspergillus niger BR-4, Aspergillus flavus BX-1 respectively. The results from the detection of the fungal culture by UV-absorbance spectrum and chemical analysis showed that high-toxic Cr(VI) was reduced to lesstoxic Cr(III). Reaction conditions and effectors of Cr(VI) reduction by intact cells of Penicillium sp. BS-1 were studied. The optimum temperature was 30 degrees C, the optimum pH was 7.0. Addition of glucose (0.25%) enhanced Cr(VI) reduction, but high concentrations of Cr(VI) inhibited the reduction of Cr(VI) to Cr(III).

Aspergillus↗
PubMed1998

[A study on microbiological characteristics of upflow anaerobic filter].

This experiment was conducted to study the relationship between performance and bacterial population in upflow anaerobic filter by improved Hungate technique. The results obtained showed as follows: (1) There existed correlation closely between the bacterial population, COD and volatile fatty acids removal; (2) The bacterial population was affected to a small extent by the change of organic loading rate in short time and suspending performance; (3) Successful performance of the reactor depended on the microbes' composition and their coordinated metabolism.

Bacteria, Anaerobic↗
PubMed1998

[An investigation on multiple drug resistance of the rifampin resistant strains of Mycobacterium tuberculosis].

The correlation between rifampin resistance and multiple drug resistance in 236 clinical isolates of Mycobacterium tuberculosis was investigated in this thesis. It has found that 99.4% of the strains with rifampin resistance were multidrug-resistant strains and 89% of the multidrug-resistant strains were resistant to rifampin. This result showed that the rifampin resistance of Tuberculosis baccilli could be used as the marker of multidrug resistance of Mycobacterium tuberculosis.

Antitubercular Agents↗
PubMed1998

[Determination of trace rare earth impurities in the high-purity lanthanum oxide by chemical spectrographic analysis].

The determination of trace rare earth impurities in the high-purity Lanthanum oxide by chemical spectrographic analysis is reported in this paped. The matrix, La2O3, was separated by the extraction-eluating resin P507. The remained rare earth impurities were absorpted by carbon powder. The rare earth impurities absorpted were determinated in carrier KBH4 by spectrographic analysis. The trace rare earth impurities in 99.9999% La2O3 can be determinated by this method.

English Abstract↗
PubMed1998

[Raman spectrum characteristics of methane].

Two characteristic Raman peaks of methane at 2917 and 3020cm(-1) were measured. The results show that the four C-H bonds of methane molecular are unequal. The assignment of Raman bands at 2917 and 3020cm(-1) was discussed in this paper.

English Abstract↗