Numerical Simulation of Mass Transfer in Hollow Fiber Membrane Module for Membrane-Based Artificial Organs.

The mass transfer behavior in a hollow fiber membrane module of membrane-based artificial organs (such as artificial liver or artificial kidney) were studied by numerical simulation. A new computational fluid dynamics (CFD) method coupled with K-K equation and the tortuous capillary pore diffusion model (TCPDM) was proposed for the simulations. The urea clearance rate predicted by the use of the numerical model agrees well with the experimental data, which verifies the validity of our numerical model.

Can multi-agent cooperation promote the ecological value realization of blue carbon in marine ranching?

Ecological value realization of blue carbon in marine ranching is essential to achieve carbon neutrality. The motivation for conducting the study is to verify whether multi-agent cooperation can promote the ecological value realization of blue carbon in marine ranching. Based on the blue carbon ecological value realization model of marine ranching enterprises, blue carbon demand enterprises, blue carbon trading platforms and government, this paper explores the cooperative governance strategy of marine ranching for each subject using cooperative game and non-cooperative game models.

Dynamic expressions of hypothalamic genes regulate seasonal breeding in a natural rodent population.

Seasonal breeding is a universal reproductive strategy in many animals. Hypothalamic genes, especially type 2 and 3 iodothyronine deiodinases (Dio2/3), RFamide-related peptide 3 (Rfrp-3), kisspeptin (Kiss-1) and gonadotropin-releasing hormone (GnRH), are involved in a photoperiodic pathway that encodes seasonal signals from day length in many vertebrate species. However, the seasonal expression patterns of these genes in wild mammals are less studied.

Magnetic resonance imaging-guided three-dimensional real-time bile duct reconstruction and end-to-end anastomosis under laparoscopy: A case report.

In laparoscopic cholecystectomy (LC), the anatomical variation of gallbladder canal should be noted. Bile duct injury is one of the most serious complications of LC, which might lead to serious complications. This case because of an intraoperative accidental cut to right anterior inferior lobe bile duct which joins to the cystic duct, after confirming by intraoperative magnetic resonance imaging-guided real-time three-dimensional bile duct reconstruction and performing end-to-end anastomosis of the right anterior inferior lobe bile duct and the gallbladder tube under laparoscopy, the patient was discharged 5 days after surgery, was followed up for 4 months and was disease-free.

A Unified Level Set Framework Combining Hybrid Algorithms for Liver and Liver Tumor Segmentation in CT Images.

Accurate and reliable segmentation of liver tissue and liver tumor is essential for the follow-up of hepatic diagnosis. In this paper, we present a method for liver segmentation and a method for liver tumor segmentation. The two methods are grounded on a novel unified level set method (LSM), which incorporates both region information and edge information to evolve the contour.

Optimisation of conditions for extracting pesticidal alkaloids from Cynanchum komarovii (Maxim.).

The methodology of a new OA(9) (3(4)) matrix and an analysis of variance technique were developed during the optimisation of extracting pesticidal alkaloids from Cynanchum komarovii. Many factors were found to affect the amount of alkaloids extracted: which parts of the plant were used - roots gave the highest yield; particle size of the material - highest yield when the plant was sieved through size 40 mesh; the type of solvent - a mixture of 0.1% hydrochloric acid with industrial alcohol was the best; The ratio of material to solvent - 1 part plant material to eight parts solvent gave the highest extraction; the duration of the extraction - 72 h and the number of re-extractions - three also improved yield.