[Differentiation of subtypes of renal cell carcinoma by double-phase helical computed tomography].

Objective: To evaluate the imaging features of different subtypes of renal cell carcinoma (RCC) by double-phase helical computed tomography (CT) and to enhance its pre-operative diagnosis level.

Methods: A total of 460 RCC were reviewed retrospectively. Tumor size, enhancement degree, enhancement drop between corticomedullary (CMP), nephrographic (NP), enhancement pattern, and tumor density (homogeneity, degeneration or necrosis, calcification) were observed respectively.

[CT features of ovarian Brenner tumor and a report of 9 cases].

Objective: In order to improve the preoperative diagnostic accuracy, the computed tomographic (CT) features of ovarian Brenner tumor were described and analyzed.

Methods: CT image and clinical data of nine patients with pathologically confirmed Brenner tumor were collected and analyzed retrospectively. There were 8 benign lesions and 1 borderline lesion.

[Evaluation of CT scanning in detecting pelvic lymph node metastasis in uterine cervix carcinoma].

Objective: To estimate the sensitivity and specificity of dynamic helical CT scanning for detecting pelvic lymph node metastasis in patients with uterine cervix carcinoma.

Methods: Totally 275 patients with pathologically confirmed uterine cervix carcinoma from Jun 2005 to Jul 2007 included bilateral pelvic lymphadenectomy were eligible. CT was performed within 30 days of surgery.

[Imaging features of nonepithelial tumors of the bladder].

Objective: To summarize the imaging features of nonepithelial tumors of the bladder.

Methods: The Imaging findings in 20 surgically treated patients with pathologically proved nonepithelial tumors of the bladder were retrospectively analyzed. The tumors included leiomyoma (n = 9), pheochromocytoma (n = 6), leiomyosarcoma (n = 2), rhabdomyosarcoma (n = 1), carcinosarcoma (n = 1), inflammatory myofibroblastoma (n = 1).

[Prediction of IVDMD with near infrared reflectance spectroscopy (NIRS) in maize stalk].

The in vitro dry matter digestion (IVDMD) in maize stalk was analyzed with 161 samples selected from 600 samples of different eco-environments, hybrids and inbred lines, development stages, and various parts of the plants in two years. The technique of near infrared reflectance spectroscopy (NIRS) and partial least square regression (PLS) were used to establish the models by comparing several preprocessing procedures and wavelength ranges. The optimal models could be obtained in the range of 6 101.

[Value of CT scanning in the diagnosis of early cervical carcinoma].

Objective: To investigate the value of CT scanning in preoperative diagnosis of early cervical carcinoma.

Methods: Abdominal and pelvic CT scans (MPR pictures for 50 patients) in 102 cervical carcinoma patients proven by biopsy pathology were retrospectively analyzed and compared with surgical pathologic findings. The pathological stages included > or = Ia in 39 patients, Ib 1 in 35, Ib 2 in 21, IIa in 6, IIb in 1.

[Predicting the chemical composition of intact kernels in maize hybrids by near infrared reflectance spectroscopy].

Intact-kernel samples of normal maize inbred lines and hybrids were collected from field experiments of three locations. Calibration equations were developed by partial least square regression (PLS) of chemical values of near infrared reflectance spectroscopy (NIRS) data and tested through both cross and external validation. In addition, 40 progenies of F1 and F2 generation not included in calibration and validation sets were verified to further evaluate the reliability of three calibration equations.

[Prediction of NDF and ADF concentrations with near infrared reflectance spectroscopy (NIRS)].

The NDF (Neutral Detergent Fiber) and ADF (Acid Detergent Fiber) concentrations in maize stalk were analyzed with 147 samples selected from 600 samples of different eco-environments, hybrids and inbred lines, development stages, and various parts of the plants in two years. The technique of near infrared reflectance spectroscopy (NIRS) and partial least square (PLS) regression were used to establish the models. The results showed that the calibration models developed by the spectral data pretreatment of the first derivative + vector normalization, and the first derivative + multivariate scattering correction were the best for NDF and ADF with the same spectral regions (7501.

[Genetic diversity analysis of maize recurrent selection populations by SSR marker].

Two cycles of mass (MS) and half-sib (HS) recurrent selection and one cycle of marker-assisted selection (MAS) for yield were carried out in two synthetic maize populations DC0 and XFC0, respectively. The genetic diversity of five maize (Zea mays L.) populations, including basic population DC0 and its developed populations HSC2, MSC2, and basic population XFC0 and its developed populations XFC1, were evaluated by 49 SSR primers, which are averagely distributed on 10 maize chromosomes.

[Peritoneal tuberculosis mimicking advanced ovarian carcinoma: distinction based on CT findings].

Objective: To evaluate the computed tomography (CT) findings of peritoneal tuberculosis mimicking advanced ovarian carcinoma for better understanding of the CT manifestations and accurate preoperative diagnosis.

Methods: CT findings of 18 cases with tuberculous peritonitis clinically simulating advanced ovarian cancer but pathologically proved otherwise were retrospectively reviewed.

Results: 1.

[Studies of genetic analysis and SSR linked marker location of gene resistance to southern rust in inbred line P25 of maize].

Using P25 (immune inbred line), F349 (susceptible inbred line) and the derived population F1, F2, B1 and B2 as materials, we investigated the heredity the of disease resistance gene to maize southern rust (Puccinia polysora Underw.) through the major-gene and polygene inheritance model. The results indicate that a major resistance gene exists in the inbred line P25 and expresses with additive effect.

Relationship between differential gene expression patterns in functional leaves of maize inbreds & hybrids at spikelet differentiation stage and heterosis.

To understand the molecular mechanism of maize heterosis, differential gene expression patterns in functional leaves between 10 maize inbreds and 38 hybrids at spikelet differentiation stage were analyzed by using cDNA-AFLP. The correlation analysis of various differential gene expression patterns with the performance and heterosis of main maize agronomic traits was carried out. The main results are as follows: (1) There are differential gene expression patterns in quality and quantity between hybrids and their parents.

[Construction the RFLP linkage map and location the NCBL QTL of maize].

There exists the race differential phenomenon in Exserohilum turcicum (namely NCBL). At present, there are 5 identified races of NCBL and some un-known races in China. For improvement of maize resistance to NCBL, a basic method is to improve maize quantitative resistance.