Biomedical subjects

B X Zhang

Publications and source records attributed to B X Zhang.

At least 55 records · Page 3Linked to original sources

PubMed1991

[Postoperative radiotherapy of renal carcinoma--analysis of 57 patients].

Retrospective analysis of 57 patients with carcinoma of kidney treated by radiotherapy postoperatively from 1970 to 1986 is reported. Thirty-six were male and 21 were female, with ages ranging from 19 to 75. All patients had unilateral nephrectomy followed by radiation therapy after an interval of 3-8 weeks. The kidney area was irradiated using either parallel opposing anterior and posterior portals or two oblique ones. 10-MV photon beam was used to deliver a total dose of 35-60 Gy with daily dose of 1.8 Gy, 5 times a week. The 3- and 5-year survival rates were 62.5% and 58.9%. The authors believe that for extra-capsular extension, tumors larger than 5 cm in diameter, presence of metastatic lymphnodes or local residual lesion, postoperative radiotherapy is indicated.

Adenocarcinoma↗

PubMed1991

A study of phlebotomine sandflies (Diptera: Psychodidae) in Yunnan Province, China. I. Phlebotomine sandflies of northeastern and western Yunnan.

From August to September, 1984 phlebotomine sandflies were collected with light-sticky traps by the authors in the following places viz., Weixin, Yanjian and Huize Counties, North-eastern Yunnan; Xiaguan, Baoshan, Shidian, Longling, Lùxi, Ruili, Yingjiang and Tengchong Counties, western Yunnan. A total of 9 species had been identified. Their systematical catalogue and zoogeographical distribution were given.

Animals↗

PubMed1990

[Long-term results of radiation therapy for pituitary adenoma--analysis of 386 cases].

A total of 386 cases of pituitary adenoma treated in our hospital from Jan. 1963 to Jan. 1986 is reported. Of them, 117 were treated by operation alone, 97 by radiotherapy alone and 172 by operation plus radiotherapy. 119 cases (group A) treated before April 1980 were mostly diagnosed by pneumoencephalography or cerebral angiography, treated, by conventional operation, followed by radiation therapy with 60Co or linear accelerator. 267 cases (group B) treated after April 1980 arrived at the correct diagnoses by CT scan and endocrine assay, treated by microsurgery, followed by radiotherapy with linear accelerator. All patients were followed for 2-23 years. The response rates of groups A and B were 90.7% and 94%. The results were better in patients treated by surgery combined with irradiation. The recurrence rate of radiation or surgery alone was higher than that of combined therapy. It is indicated that the optimal treatment for pituitary adenoma is surgery combined with radiotherapy. Besides, the introduction of CT scan and microsurgery has improved the diagnosis and treatment results of pituitary adenoma.

Adenoma, Acidophil↗

PubMed1990

[Primary non-squamous cell carcinoma of the trachea and main bronchus--analysis of 17 cases].

Seventeen patients with primary non-squamous cell carcinoma in the trachea and main bronchus are reported. Tomography and bronchoscopy are of great help in the diagnosis of this disease. CT scan is useful to show the extent of the tumor and lymph node metastasis. The treatment should depend on the extent of the lesion, pathologic type and general condition of the patient. Surgery is the treatment of choice for the early stage lesion, while pre- or post-operative irradiation is given to patients with larger tumor. In patients with localized lesion but unsuitable for operation because of late stage or poor differentiation of the tumor, radical radiotherapy alone should be used. A total dose of 70-80 Gy/7-8 weeks is suggested.

Adenocarcinoma↗

PubMed1989

Transposition of iliac periosteum with vascular pedicle and compression screw fixation for transcervical fracture of femur. Experimental research and clinical application.

The vascular pedicled periosteum was used in 11 cases in our hospital for the treatment of femoral neck fracture with good result. The follow-up period ranged from 2 to 6 years, with an average of 4 years. Animal experiment was made to elucidate the repairing process. It demonstrated that the pedicled periosteum played double roles, namely, blood supply and osteogenesis. The clinical and experimental results are presented.

Adolescent↗

PubMed1989

Cloning and expression of delta-endotoxin gene of Bacillus thuringiensis in Escherichia coli.

Fragments (larger than 4 kb) of partially Sau 3AI-digested plasmid DNA from Bacillus thuringiensis subsp. kenyae 7404 and kurstaki HD-1 were cloned into the BamH I site of pBR322. Four transformants, containing the corresponding delta-endotoxin gene and producing proteins that reacted with antiserum against crystalline protein, were selected on the basis of results from in situ colony hybridization, radioimmunologic screening, and Western blot analysis. Three of those tested, i.e., the lysates of one transformant (TK89) carrying the delta-endotoxin gene of B.t. 7404 and two transformants (TH12 and TH48) carrying the delta-endotoxin gene of HD-1, were toxic for tobacco budworm (Heliothis assulta) and armyworm (Leucania separata Walker) caterpillars. This is the first report on cloning of the delta-endotoxin gene from B.t. subsp. kenyae, which is different in serotype from the well-studied subsp. kurstaki.

Animals↗

PubMed1987