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This study was to develop and validate a model for predicting who can benefit from multiple transcatheter arterial chemoembolization (TACE) in hepatocellular carcinoma (HCC) patients. 228 and 98 patients were included in the development and validation sets, respectively. The primary clinical endpoint was benefiting from consecutive multiple TACE treatments. Logistic regression analysis was used to screen the independent risk factors for the clinical endpoint. The independent risk factors were then used to construct the predictive model. The area under receiver operating characteristic (ROC) curves, calibration curves, and clinical decision curves were used to evaluate the predictive ability of the model. Multivariate Logistic regression analysis showed that complete envelope, hepatic lopes, tumor number, and alpha-fetoprotein (AFP) were independent risk factors for benefiting from multiple TACE in HCC patients. The area under the curve (AUC) of the model constructed by using independent risk factors in the development and validation sets was 0.843 (95% confidence interval [CI]: 0.784–0.902) and 0.828 (95%CI: 0.739–0.916), respectively. The calibration curves and clinical decision curves showed that the model had good predictive ability. The model established in this study has a good predictive effect on HCC patients who can benefit from multiple TACE. [ABSTRACT FROM AUTHOR]

Background: This study was to compare the safety and efficacy of different lymphadenectomy methods in patients with pancreatic head cancer undergoing pancreaticoduodenectomy (PD). Material and methods: A total of 150 patients were included in this study. Patients were divided into Group A (n = 79), Group B (n = 44), and Group C (n = 27) according to the different lymphadenectomy methods. The clinical endpoint was time to progression (TTP) and overall survival (OS). Postoperative complications of different lymphadenectomy methods were compared respectively. TTP and OS of the three groups were compared by Kaplan–Meier curves. Results: There were no significant differences between the three groups in operative time (P = 0.300), death in the hospital (P = 0.253), postoperative hemorrhage (P = 0.863), postoperative pancreatic fistula (POPF) B/C (P = 0.306), bile leakage (P = 0.215), intestinal fistula (P = 0.177), lymphatic leakage (P = 0.267), delayed gastric emptying [(DGE) (P = 0.283)], ICU stay (P = 0.506), and postoperative hospital stay [(PHS) (P = 0.810)]. Median TTP in Groups B and C was significantly longer than in Group A (log-rank test, A vs B: P = 0.0005, A vs C: P = 0.0001). Median OS between the three groups has no statistical difference (P = 0.1546). Conclusions: Extended lymphadenectomy methods based on the TRIANGLE do not increase perioperative complications significantly and can effectively delay tumor progression in patients with pancreatic head cancer. [ABSTRACT FROM AUTHOR]

Double random phase encoding (DRPE) is one of the most classic methods in optical image encryption. Since the linear property of DRPE makes the encryption system based on DRPE vulnerable to attacks, the researchers have introduced the scrambling and diffusion structure on the basis of DRPE. However, it is found in this study that the added scrambling and diffusion operations cannot destroy the linear property of DRPE totally, and there are still some security holes. This paper proposes an attack scheme for a class of the DRPE encryption systems based on scrambling and diffusion, and reveals the equivalent encryption methods to the original cryptosystems. The experimental results show that the structural similarity index measure and correlation coefficient index of the plaintext image and original image recovered by the attack method are close to 1. The effectiveness of the scheme is proved by mathematical analysis and experimental results. [ABSTRACT FROM AUTHOR]

The aim of the study was to synthesize the complexes of Wogonin with β-cyclodextrin (β-CD) and hydroxypropyl-cyclodextrin (HP-β-CD) by refluxing method, and the experimental resulted confirmed the forming of Wogonin complexes with CDs by nuclear magnetic resonance spectroscopy, infrared spectra and differential scanning calorimetry at 60 °C refluxing for 6 h. Kinetic studies of 2,2-diphenyl-1-picrylhydrazyl (DPPH·) with Wogonin and cyclodextrins (CDs) complexes were done. The results obtained indicated that the Wogonin/HP-β-CD complex was the most reactive form. [ABSTRACT FROM AUTHOR]

Global change has influenced the distribution pattern and spatio-temporal changes of resources in arid zone, and has restrained the land use and land cover change, which is shown by water-heat state, landscape structure, climate effect, and human activities. The above-mentioned characteristics have a close coupling relation with the mountain-oasis-desert system (MODS). The climate in Central Asia arid zone is warm and wet, which is different from that in northern China which takes a tendency of aridity, and the mechanism has restricted the characteristics and laws of MODS. Systematic interlace characteristics and process, especially the formation, transformation and consumption laws of water resource reflect directly MODS's response to global change in arid zone. Spatio-temporal pattern, dynamic change, scale change and coupling mode of MODS reflect the ecology mechanism between the systems and within the systems. [ABSTRACT FROM AUTHOR]

The occurrence and development of riparian forests which are mainly dominated by mesophytes species relate closely with surface water. Since there is no water discharge to the lower reaches of Tarim River in past 5 decade years, the riparian forests degrade severely. Based on the analyses of the monitored data of Yingsu, Argan and Luobuzhuang in 2002 and 2003, the effect of water-recharging is discussed. The water-recharging project neglects the fact that that it is flooding that controls the process of Populus euphratica colonizing on the bare surface, but focuses on groundwater influence on vegetation. The flooding control deviates Inherent laws of riparian forests development, so the natural regeneration of riparian forests is checked. The response scope of riparian plants on groundwater uplift is extremely narrow, and most riparian communities have not been optimized. No seedlings of dominant species are found in flooding areas because their physio-ecological characteristics are ignored. The vegetation changes in vicinities of stream only reflect the demand of mesophytes species on the shallow groundwater, however, the water-recharging fails to provide suitable habitats for the seedlings establishment of riparian plants. The present water-recharging scheme is difficult to realize vegetation restoration. [ABSTRACT FROM AUTHOR]

Based on remote sensing information sources including B/W aerial photos of 1983, pseudo-color aerial photos of 1992 and JERS-1/OPS VNIR image of 1996, vegetation types of Yingbazha, in the middle reaches of the Tarim River Basin in Xinjiang, China are mapped using ARC/INFO and related software. The changes in vegetation areas and distribution conditions are analyzed. As a result of natural and human influences, vegetation changes have temporal and spatial characteristics. According to the principles of landscape ecology and geographical information science, the landscape changes are indicated. Moreover, the remote sensing and GIS techniques are integrated to study vegetation and its landscape. [ABSTRACT FROM AUTHOR]

Discusses the origin and valuation on coal-generated oil and gas. Details on the hydrocarbon potential and evaluation of coal and macerals; Thermal stimulation experiments of oil and gas generation of coal; Law and evaluation indexes on oil and gas generation of coal.

Presents a study which evaluates the gold emigration from algae to organic matter and organic fluid under the geologic processes. Role of organic matter and crude oil in gold geochemistry processes; Formation of an organism-organic matter-fluid system; Results of the study.