Climatic and anthropogenic regulation of carbon transport and transformation in a karst river-reservoir system.

The effect of dams on dissolved inorganic carbon (DIC) transport and riverine ecosystems is unclear in karst cascade reservoirs. Here, we analyzed water samples from a karst river system with seven cascade reservoirs along the Wujiang River, southwestern China, during one hydrological year. From upstream to downstream, the average concentration of DIC increased from 2.

Remnant preservation technique versus standard technique for anterior cruciate ligament reconstruction: a meta-analysis of randomized controlled trials.

Background: This meta-analysis was performed to compare the clinical outcomes of primary anterior cruciate ligament (ACL) reconstruction using the ACL remnant preservation technique versus the standard technique.

Methods: PubMed, Embase, and the Cochrane Library were searched through December 24, 2017, to identify randomized controlled studies that compared the use of the ACL remnant preservation technique versus the standard technique for primary ACL reconstruction. Statistical heterogeneity among the trials was evaluated with chi-square and I-square tests.

Comparison of clinical outcomes after anterior cruciate ligament reconstruction with hamstring tendon autograft versus soft-tissue allograft: A meta-analysis of randomised controlled trials.

Background: Hamstring tendon autografts and soft-tissue allograft are commonly used for anterior cruciate ligament (ACL) reconstruction. However, the clinical outcomes between these two grafts are controversial. This meta-analysis was performed to compare clinical outcomes of primary ACL reconstruction with hamstring tendon autografts versus soft-tissue allografts.

[Effect of Nutrient Cycles in Tributaries on the Transport of Nutrient in the Three Gorge Reservoirs:A Case Study of Caotang River].

Backwater regions have been formed in the downstream of tributaries since the Three Gorge Reservoir (TGR) was impounded, as the most influential area to the aquatic environment within the reservoir. In order to study the effects and significance of the backwater regions on the nutrient cycling and substance fluxes, dissolved inorganic nitrogen (DIN), dissolved inorganic phosphorus (DIP), dissolved silicon (DSi) were monitored in situ in Caotang tributary backwater region, the adjacent mainstream and Caotang tributaries' upstream every month from August 2012 to July 2013. The results showed that the concentrations of DIN, DIP and DSi in Caotang tributary backwater region were similar to those in the mainstream, and the monthly variation tendency was very consistent with the mainstream Changjiang.

Establishment and characterization of an immortalized rat hepatic stellate cell line.

Hepatic stellate cells (HSCs) play an important role in liver fibrosis and portal hypertension. This study established a new rat HSC cell line LSC-1. Liver ex vivo perfusion with collagenase IV and density gradient centrifugation were used to isolate rat HSC.

[Nutrient Exchange Between Meixi River and Yangtze River Due to the Typical Interaction Process of the Three Gorges Reservoir and Its Tributary].

Frequent algal blooms have been observed in the Meixi bay of the Three Gorges Reservoirs (TGR) since its initial filling. In order to understand the effects of intrusions from Changjiang mainstream on the nutrient supply of the Meixi Bay, a detailed field monitoring was conducted from August 2012 to July 2013. The results showed that there were significant intrusions from the mainstream to the Meixi Bay during the different water level scheduling periods of the TGR.

G-protein coupled receptor 34 knockdown impairs the proliferation and migration of HGC-27 gastric cancer cells in vitro.

Background: Overexpression of G-protein coupled receptor 34 (GPR34) affects the progression and prognosis of human gastric adenocarcinoma, however, the role of GPR34 in gastric cancer development and progression has not been well-determined. The current study aimed to investigate the effect of GPR34 knockdown on the proliferation, migration, and apoptosis of HGC-27 gastric cancer cells and the underlying mechanisms.

Methods: The expression of GPR34 in gastric cancer cell line HGC-27 was detected by quantitative real-time reverse transcription-polymerase chain reaction (RT-PCR) and Western blotting.

[Partial pressure and diffusion flux of dissolved carbon dioxide in the mainstream and tributary of the central Three Gorges Reservoir in summer].

This study investigated the partial pressure of CO2 (pCO2) in the mainstream of the Three Gorges Reservoir and its tributary (Meixi River) in May 2013. Results showed that pCO2 in the surface water of the Meixi River and mainstream of the Three Gorges Reservoir was 6.8-7.

Ileo-colonic intussusception secondary to small-bowel lipomatosis: a case report.

Intestinal lipomatosis is a rare disease with an incidence at autopsy ranging from 0.04% to 4.5%.

[Effect of erythromycin on electrical activity and gastric emptying of the intrathoracic stomach after esophagectomy for esophageal cancer].

Objective: To investigate the effect of erythromycin on electrical activity and emptying of the intrathoracic stomach after esophagectomy for esophageal cancer.

Methods: Thirty patients undergoing esophagectomy for cancer and esophagogastrostomy above the aortic arch were divided into the study group (n=15) and the control group (n=15). Electrogastrography and radionuclide gastric emptying were examined for these patients before and 1, 3, 6, 12 months after surgery.

[Antireflux anastomosis following resection of esophageal cancer].

Objective: To investigate the antireflux effects of a modified Nissen fundoplication following esophagectomy for cancer.

Methods: From March 2006 to March 2007, 70 patients with esophageal cancer were divided into two groups randomly. Esophagogastrostomy with a stapler only was perform in 35 patients as controls (group C), and a modified Nissen fundoplication was added after esophagogastrostomy with stapler in the other 35 patients as observed group (group O).

[Diffusion flux of partial pressure of dissolved carbon dioxide in Wan'an reservoir in spring].

In order to understand the emission of greenhouse gases (CO2) from the river-type reservoir, this study investigated the partial pressure of CO2 [p(CO2)], in the surface water, inflow waters, outflow waters of the Wan'an reservoir in China in the May 2009. p(CO2) in the inflow water, outflow water were calculated from titration method, and the surface water p(CO2) was measured underway using a continuous measurement system (equilibrator-NDIR system). Results showed that the inflow water from the Zhangshui, Meijiang, Taojiang have higher p(CO2) than atmosphere level, with the values of 211.

[Dissolved inorganic carbon and its carbon isotope composition in cascade reservoir of the Maotiao River during summer and autumn].

Water samples along water column in the front of dams and samples at 0.5 m below surface water from tributary rivers were collected in July and October, 2007. The water chemistry, concentrations of dissolve inorganic carbon and its carbon isotopic compositions were determined, in order to investigate the geochemical behavior of carbon in the Maotiao River.

Human impact on the historical change of CO2 degassing flux in River Changjiang.

The impact of water quality changes in River Changjiang (formally known as the Yangtze River) on dissolved CO2 and silicate concentrations and seasonal carbon flux in the past several decades (1960s-2000) was evaluated, based on monitoring data from hydrographic gauge. It was found that dissolved CO2 and silicate in Changjiang decreased dramatically during this decades, as opposed to a marked increase in nutrient (e.g.

[Residue of PCBs and OCPs in the paddy soil from Hongfeng reservoir area, Guizhou, China].

Distributions of seven PCBs (polychlorinated biphenyls) congeners and 13 OCPs (organochlorinated pesticides) were investigated in paddy soil section in Hongfeng reservoir area. The results showed that DDTs and its metabolized compounds, isomer of HCHs, Endrin, heptachlor, PCB 28 and PCB 52 were detected in all soil samples. Compared to the polluted area, the concentrations of PCBs were lower in study area, while the compositions of organic pollutants in soil samples were similar.

[Long-term outcome of antireflux surgery for gastroesophageal reflux disease].

Objective: To investigate the long-term outcomes of various antireflux procedures for gastroesophageal reflux disease (GERD).

Methods: Between November 1988 and January 2004, 129 patients with GERD underwent antireflux procedures. Six kinds of antireflux procedures were performed including Nissen fundoplication, cardiac oblique invagination (COI) procedure, Belsey Mark IV, Toupet, Thal and Dor procedures.

[Functional study of the remnant esophagus and intrathoracic stomach in patients who underwent esophagectomy for cancer].

Objective: To investigate pathophysiological changes of the remnant esophagus and gastric cardia in patients who underwent esophagectomy for cancer, and to provide objective evidences for the improvement of the postoperative quality of life.

Methods: The function of the remnant esophagus and intrathoracic stomach in patients who underwent esophagectomy for cancer were assessed objectively. The methods that we used were gastric scintigraphy, esophageal manometry, 24-hour esophageal pH monitoring, electronic gastroscopy, videofluoroscopy, and DeMeester scoring system for the assessment of heartburn.

Clinical analysis of surgical treatment of portal hypertension.

Aim: To review the experience in surgery for 508 patients with portal hypertension and to explore the selection of reasonable operation under different conditions.

Methods: The data of 508 patients with portal hypertension treated surgically in 1991-2001 in our centers were analyzed. Of the 508 patients, 256 were treated with portaazygous devascularization (PAD), 167 with portasystemic shunt (PSS), 62 with selective shunt (SS), 11 with combined portasystemic shunt and portaazygous devascularization (PSS+PAD), 9 with liver transplantation (LT), 3 with union operation for hepatic carcinoma and portal hypertension (HCC+PH).

[Acid mining drainage impacts on the separation between iron and manganese in sediments of the Aha Lake, Guizhou Province].

Since the Aha Lake, located in Guizhou Province, China, was enlarged in 1982, a great amount of iron and manganese were input into it owing to the uninterrupted pollution from acidic mining drainage of coal mines (AMD). The results show that dissolved Fe2+ and Mn2+, mainly from AMD, were markedly separated each other as water flowed from inlet to downstream. The Aha lake water, with the average pH equal to 7.

Neurons derived from human mesenchymal stem cells show synaptic transmission and can be induced to produce the neurotransmitter substance P by interleukin-1 alpha.

Mesenchymal stem cells (MSCs) exhibit immune-suppressive properties, follow a pattern of multilineage differentiation, and exhibit transdifferentiation potential. Ease in expansion from adult bone marrow, as well as its separation from ethical issues, makes MSCs appealing for clinical application. MSCs treated with retinoic acid resulted in synaptic transmission, based on immunostaining of synaptophysin and electrophysiological studies.

[The diagnosis and treatment of hepatic artery complications in 107 cases of orthotopic liver transplantation].

Objective: To investigate the diagnosis and managements of hepatic artery complications in orthotopic liver transplantation.

Methods: The clinical data of 107 consecutive orthotopic liver transplantation patients was reviewed retrospectively to assess the risk factors and the diagnosis and treatment of the vascular complications.

Results: The incidence of the artery related complications in orthotopic liver transplantation was associated with the quality of the donor organ artery and the reconstruction way of donor-recipient artery intimately.

[A study on the method of DNA extraction from unbuffered formalin-fixed and paraffin-embedded samples].

Background & Objective: Unbuffered formalin is widely used to fix resected specimens in China. The DNA in unbuffered formalin-fixed and paraffin-embedded tissues is usually degraded seriously, so the extraction of DNA from these samples is difficult. This study was conducted to seek an optimal method to extract DNA from these samples.

Responses of human clasp and sling fibers to neuromimetics.

Background And Aims: It has previously been demonstrated that clasp and sling fibers at the human gastroesophageal junction respond differently to acetylcholine (Ach). The present study was undertaken to investigate the differences between the physiological and pharmacological properties of the two types of muscle fiber.

Methods: Recordings were made of the isometric tension of human sling and clasp fibers in response to Ach, dopamine (DA), phenylephrine (Phe), and isoprenaline (Iso).

Long-term outcome of esophageal myotomy for achalasia.

Aim: Modified Heller's myotomy is still the first choice for achalasia and the assessment of surgical outcomes is usually made based on the subjective sensation of patients. This study was to objectively assess the long-term outcomes of esophageal myotomy for achalasia using esophageal manometry, 24-hour pH monitoring, esophageal scintigraphy and fiberoptic esophagoscopy.

Methods: From February 1979 to October 2000, 176 patients with achalasia underwent modified Heller's myotomy, including esophageal myotomy alone in 146 patients, myotomy in combination with Gallone or Dor antireflux procedure in 22 and 8 patients, respectively.