Effective defect generation and dual reaction pathways for phenol degradation on boron-doped carbon nanotubes.

A new type of metal-free catalyst was successfully prepared by doping boron (B) in the carbon nanotube. The catalyst had 99.4% removal of phenol in 60 min at pH 7 by activating peroxymonosulfate (PMS).

Insights into the peroxomonosulfate activation on boron-doped carbon nanotubes: Performance and mechanisms.

Preparation of carbonaceous catalysts by doping with boron (B) is one of the most promising strategies for substitution of toxic transition metal catalysts in advanced oxidation processes. This study was dedicated to reveal the intrinsic structure-performance relationship of peroxomonosulfate (PMS) activation by B-doped carbon nanotubes toward catalytic oxidation of pollutants. Performance tests showed the catalyst realized more than 95% phenol removal at pH 7 in 1 h and 69.

Recurrent Ventral Curvature with Long-Term Follow-up after Transverse Preputial Island Urethroplasty.

Objective:  This study was aimed to assess the long-term outcomes of recurrent ventral curvature (VC) repaired in early childhood after transverse preputial island flap urethroplasty.

Materials And Methods:  A total of 378 patients underwent transverse preputial island flap urethroplasty between January 2000 and January 2005 at our hospital. Of these patients, 43 were invited for assessment of VC after puberty.

Staged transverse preputial island flap urethroplasty for proximal hypospadias: a single-center experience.

Purpose: To evaluate the intermediate outcomes of our institution's experience with staged TPIF urethroplasty for proximal hypospadias repair.

Methods: We retrospectively evaluated the medical records of patients who underwent repair of proximal hypospadias using staged TPIF urethroplasty at our hospital from 2011 to 2017.

Results: One hundred and two patients were included in the present study.

Complications of proximal hypospadias repair with transverse preputial island flap urethroplasty: a 15-year experience with long-term follow-up.

There is still debate regarding the optimal surgical approach for proximal hypospadias. This retrospective study aims to evaluate the long-term outcomes using transverse preputial island flap urethroplasty. A total of 320 patients were included, with a mean follow-up of 40.

Ubiquitous anaerobic ammonium oxidation in inland waters of China: an overlooked nitrous oxide mitigation process.

Denitrification has long been regarded as the only pathway for terrestrial nitrogen (N) loss to the atmosphere. Here we demonstrate that large-scale anaerobic ammonium oxidation (anammox), an overlooked N loss process alternative to denitrification which bypasses nitrous oxide (N2O), is ubiquitous in inland waters of China and contributes significantly to N loss. Anammox rates in aquatic systems show different levels (1.

[Effects of copper deficiency on iron metabolism in rats].

Objective: To study the effects of copper deficiency on iron metabolism, the expression of IRP mRNA and Fn mRNA and transferrin receptor mRNA in rats.

Methods: Forty clean male SD rats were randomly divided into four groups according to body weight and there were 10 rats in each group. The groups are normal iron and copper control group (group I), copper deficiency group (group II), normal iron and copper slightly deficient group (group III), both iron and copper slightly deficient group (group IV).

[Effects of different zinc nutritional status on iron metabolism in rats].

Objective: To study the effects of different zinc nutritional status on iron metabolism and explore the potential role of iron regulator protein 2 (IRP2) under conditions of zinc deficiency.

Methods: Forty clean male SD rats were randomly divided into four groups according to the weight and every group included 10 rats. The rats were administrated normal iron and zinc control group (ZA group), normal iron and slight deficient group (ZD group), Paired fed group (PF group), normal iron and zinc excessive group (ZE group).

Nitrous oxide reductase gene (nosZ) and N2O reduction along the littoral gradient of a eutrophic freshwater lake.

Lake littoral zones are characterized by heterogeneity in the biogeochemistry of nutrient elements. This study aimed to explore the relationship between the nitrous oxide reductase gene (nosZ)-encoding denitrifier community composition/abundance and N2O reduction. Five samples (deep sediment, near-transition sediment, transition site, near-transition land and land soil) were collected along a littoral gradient of eutrophic Baiyangdian Lake, North China.

Vitamin A deficiency aggravates iron deficiency by upregulating the expression of iron regulatory protein-2.

Objective: The aim of this study was to investigate the mechanism between vitamin A deficiency and anemia.

Methods: In this study, we performed animal and in vitro experiments to investigate the effect of vitamin A deficiency on iron regulator protein-2 (IRP2). In animal experiments, four parallel groups of rats were fed a control diet, a diet completely deficient in vitamin A, a diet marginally deficiency in vitamin A, and a diet marginally deficient in iron and vitamin A, respectively, for 8 wk.

Body mass index and susceptibility to knee osteoarthritis: a systematic review and meta-analysis.

Objective: Excess bodyweight, expressed as increased body mass index, is associated with osteoarthritis risk, especially in weight bearing joints. However, the strength of the association was inconsistent. The study was conducted to quantitatively assess the association between body mass index and the risk of knee osteoarthritis and investigate the difference of the strength stratified by sex, study type and osteoarthritis definition.

Anaerobic ammonia oxidation in a fertilized paddy soil.

Evidence for anaerobic ammonium oxidation in a paddy field was obtained in Southern China using an isotope-pairing technique, quantitative PCR assays and 16S rRNA gene clone libraries, along with nutrient profiles of soil cores. A paddy field with a high load of slurry manure as fertilizer was selected for this study and was shown to contain a high amount of ammonium (6.2-178.

[Effect of copper deficiency on iron metabolism in rats].

Objective: To study the effect of copper deficiency on the nutritional status of iron, the expression of hepcidin mRNA and transferrin receptor mRNA in rats.

Methods: Forty eight clean male SD rats were randomly divided into four groups according to body weight; and there were 12 rats in each group. The groups are normal iron and copper control group (group I), normal iron and copper deficiency group (group II), normal iron and copper slightly deficient group (group III), both iron and copper slightly deficient group (group IV).

[Effect of all-trans retinoic acid deficiency on iron metabolism in rat primary hepatocyte].

Objective: To study the influence of atRA on iron metabolism in cultured primary rat hepatocyte.

Methods: Rat primary hepatocytes were isolated by two-step in situ collagenase perfusion method by Seglen, and after that Cell viability was observed by 0.4% trypan blue.

[Effect of iron deficiency on vitamin A metabolism in rats].

Objective: To study the effect of iron deficiency on vitamin A (VA) metabolism in rats.

Methods: Forty-four male SD rats were divided randomly into four groups according to their body weights and every group included 11 rats: control group (I group), entire iron deficient and normal VA group (II group), slight iron deficient and normal VA group (III group), slight iron and VA deficient (IV group). After being raised for 10 weeks, the rats were sacrificed and the serum VA, retinol-binding protein (RBP), hemoglobin, serum iron, serum iron saturation, VA in the liver, retinyl ester in the liver were determined.

[Effect of higher iron in diet on iron levels and hepcidin mRNA expression levels in rats].

Objective: To study the effects of higher iron in diet on weight, iron status and hepcidin mRNA expression level in rats.

Methods: Sixty clean male SD rats were randomly divided into 6 groups according to the weight and were administrated higher iron at the doses of 35, 100, 200, 500, 1000, 3500 mg/kg of irons, respectively. Rats were killed after 8 weeks and serum and liver and duodenum of rats were collected.

[Influences of iron overload on lipid peroxidation in rats and inhibiting effects of antioxidant vitamins].

In order to explore the influences of iron overload on lipid peroxidation of rats and the inhibiting effects of antioxidant vitamins such as vitamin E and beta-carotene on the influences induced by iron overload, eighty male Wistar rats were randomly divided into 8 groups according to the weight. The diets of the former 4 groups differed only in iron concentration (50, 200, 350 or 500 mg/kg diet). The diet of the latter 4 groups were consistent with the former 4 groups respectively, but complemented with vitamin E(100 mg/kg diet) and beta-carotene (25 mg/kg.