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Biomedical subjects

Z Liu

Publications and source records attributed to Z Liu.

At least 1,297 records · Page 72Linked to original sources
PubMed1992

[Vitrectomy combined with intravitreal injection of drugs for the management of advanced suppurative endophthalmitis].

Sixty cases (60 eyes) of advanced suppurative endophthalmitis treated by a combination of vitrectomy and intravitreal injection of drugs (antibiotics or/and corticosteroids) were investigated perspectively. Of the 60 cases, 43 were infected after trauma, 12 were infected after surgical procedures, while the others were of unknown causes. During the follow-up period of 1/2-5 years, 57 cases (95%) retained functioning eyes, the postoperative visual acuity of 34 eyes (57%) being 0.05 or better and the postoperative visual acuity of 17 eyes (28%) 0.4 to 1.0. The advantages of the therapeutic regimen are analyzed. We believe that it is the most effective therapy for suppurative endophthalmitis. The timing of the operation and the factors influencing the results are discussed. This report also presents our clinical experiences in the management of advanced suppurative endophthalmitis.

Adolescent↗
PubMed1992

[Effect of TRH on anti-restraint stress in rats].

Strong stress in response to restraint was observed in rats. In these rats, plasma ACTH increased significantly (P less than 0.001) while T3 and T4 decreased (P less than 0.05). After the rats were injected intraperitoneally with TRH, the plasma ACTH increase was obviously attenuated (P less than 0.001), while T3 INS and GLU increased (P less than 0.05) as compared with control rats. The results indicate that peripheral TRH participates in ACTH regulation during restraint stress.

Adrenocorticotropic Hormone↗
PubMed1992

[Cytomegalovirus-DNA in serum and renal tissue of patients with IgA nephropathy].

Cytomegalovirus (CMV) has been suspected to be involved in the pathogenesis of IgA nephropathy (IgAN). In this study, IgAN both with and without recurrent gross hematuria (GH), cases of MsPGN, MN were included, 10 cases in each group. Sera were obtained and analyzed for the presence of CMV-DNA with polymerase chain reaction. Renal biopsies of the 20 cases of IgAN were also analyzed for the presence of CMV-DNA with in situ hybridization. The positive rates of serum CMV-DNA were 7/10 in IgAN (GH), 2/10 in IgAN (non-GH), 1/10 in MsPGN and 1/10 in MN. It was much higher in IgAN (GH) than in the other groups. There was only 1 case which showed CMV-DNA in renal tissue in IgAN (GH) and IgAN (non-GH) respectively. The high frequency of CMV-DNA present in the serum but not in the renal tissue of IgAN implicated that there was a close association but not etiological relationship between them.

Cytomegalovirus↗
PubMed1992

[The role of ear electroacupuncture on arterial pressure and respiration during asphyxia in rabbits].

This paper reports the study of the effect of ear electroacupuncture (EA) inserted in the "Er Jian" point on arterial pressure and integrated phrenic nerve discharge (IPND). The result showed that the arterial pressure was decreased and frequency of IPND was increased. The differences as follows: During spontaneous breathing, the blood pressure and IPND were -36.56 +/- 26.63 mmHg and, 2.42 +/- 1.42 spikes/10S (P less than 0.001); in excitatory period, -24.31 +/- 6.01 mmHg and, 2.16 +/- 1.12 spikes/10S (P less than 0.01) and in inhibitory period -18.26 +/- 7.04 mmHg (P less than 0.01) and, 2.07 +/- 1.07 spikes/10S (P less than 0.05). The lasting time was 26 min, 330S and 280S. We observed 20 cases with hypertension by ear electro-acupuncture. The systolic pressure and diastolic pressure of hypertension patients were decreased (P less than 0.001) and respiratory rate increased (P less than 0.05).

Acupuncture Points↗
PubMed1992

Surgical therapy of temporal lobe seizures.

Resection of epileptogenic lesions and pathological studies were performed in all 35 patients with temporal lobe epilepsy, 20 male and 15 female. Their ages ranged from 6 to 48 years with an average of 22 years. Various examinations including CT scan were carried out without any positive finding. EEG showed spike formation in the temporal lobes in all 35 patients. Epilepsy lesions were removed from the right temporal lobe in 22 patients and from the left temporal lobe in 13 patients. Pathological changes were found in all epilepsy lesions by light and electron microscopy. The operative outcomes were seizure-free since discharge in 10 patients (28.5%), seizure-free after some early attacks (34.2%) in 12 patients, seizure-free for 2 or more years and then rare or occasional attacks in 6 patients (17.1%), marked reduction of seizures in 5 patients (14.5%) and moderate or less reduction of seizure tendency in 2 patients (5.7%), with an effective rate of 93%. No death or severe complications did occur.

Adult↗
PubMed1992

Low molecular mass heat-shock proteins of a light-resistant photoautotrophic cell culture.

Two low molecular mass heat-shock proteins (HSPs) of photoautotrophic cell culture (Chenopodium rubrum) have been cloned, sequenced and compared to published sequences. One of these HSPs (23.3 kDa) is posttranslationally transported into chloroplasts and shares homology with the other heat-shock proteins in the last third C-terminal region of the protein, but has a relatively unique sequence in the other two thirds. The correspondent small cytosolic protein of 18.3 kDa is related to all known small HSPs but has a unique DNA-binding domain that has not been described so far in the group of small cytosolic HSPs, it might represent a HSP which is translocated into the nucleus.

Amino Acid Sequence↗
PubMed1992

Effects of tetrandrine on lung-lipid contents of rats with experimental silicosis.

The wet weight, lipid contents and the percentages of PL components of lung tissues, SAM and AM of normal, Silicotic and TT treated rats were analysed. It was indicated that the wet weight, lipid contents of lung tissues, SAM and AM of Silicotic rats all were increased, and with the lapse of experimental period. In lung tissues the percentages of PC, PG and PI accounted for the total PL were increased and PS, S were decreased in comparison with those of normal rats. The PL percentages in SAM of Silicotic rats were not significantly different from those of normal rats. The wet weight, lipid contents of lung tissues, SAM and AM, percentages of PL components in lung tissues of TT treated rats were higher than that of normal rats and lower than that of silicotic rats. The percentages of PC, USPC accounted for the total PL in SAM of TT treated rats were lower while PI, PS,S were higher than that of normal and Silicotic rats. The other percentages of PL components were not significantly different from that of normal and silicotic rats.

Alkaloids↗
PubMed1992

A study on optimum load for physical work.

Five healthy men were chosen as experimental subjects and were divided into groups at random. The subjects walked with a load in a shoulder-waist-back manner on the treadmill at the speed of 5, 7 and 9 km h-1. The parameters measured were as follows: oxygen expenditure, energy consumption, heart rate and self appraisal. Based on the experimental results and analysis of multiple regression, the authors suggested that physical loading should not exceed 25 kg (i.e. roughly equal to 39% of average body weight of male Chinese), when the walking speed was at 5 km h-1. The suitable loading at physical work would be 20 kg (i.e. equal to 31% of the average body weight of male Chinese).

Adult↗
PubMed1992

[Chemical analysis of lipopolysac-charides derived from oral anacerobes]

Lipopolysaccharides were isolated from six oral anaerobes(Va.Bg.Bf.Fn.Aa.Co.)by the hot phenol-water procedure and purified by PCP method.The six species can be all extracted their LPS with different yields (from 0.70 to 2.83% of cell dried weight).Comparable of LPS with the enterobacteriaceae(Sm.),they were the constructed with hexosamine,fatty acids and phosphorus etc.On the other hand,they showed much distinct differences from the enterobacterial LPS structure as follow:(1) 2-keto-3-deoxy-D-mannooctonate(KDO) was not detected by routine procedure.(2)The amount of heptose is reltively lower.(3) Methylated and branched fatty acids were detected.These chemical characteristics may relate to biological activities and pathogenic potential of LPS and bacteria themselves.

Journal Article↗