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This study was conducted to evaluate the effects of two forms of static hydroponics and dynamic hydroponics along with two nutrient solutions, BK-fast and Hydro Umat, on the growth and quality of celery plants. The results showed that "Thera" variety celery grown in the dynamic hydroponic system grew better than the static hydroponic growing in both studied solutions, with the plant height reaching 35.02 - 37.3 cm, 8.79 - 9.02 of leaves\plant, the fresh weight of 32.14 - 39.92 g. Regarding the quality parameters, the dynamic hydroponic form increased the content of reducing sugars, total organic acids and nitrate while reducing the content of the mineral elements including potassium, iron and magnesium that accumulated in the celery plant. For two nutrient solutions, Hydro Umat solution helped plants grow better and increased nitrate accumulation compared to BK-fast solution. However, the results on parameters containing of number of leaves\plant, reducing sugar content, the content of vitamin C and total organic acid were not statistical difference between celery plants nourished by these two solutions.

Air pollution is one of the global problems with adverse effects on many aspects of human life, on different population groups and on the ecology of animals and plants. The effects of air pollution on disadvantaged communities in society such as children with disabilities are also considered. This paper describes the research results on the effects of air pollution on children with disabilities through narrative review and content analysis from 39 articles published from 2010 to 2020. Results showed that most studies were conducted in developed countries from the large survey sample sizes in wide age ranges from from pregnancy to 19 years of age in longitudinal, cross-sectional and retrospective study designs. Air pollution is determined based on the indicators of nitrogen dioxide (NO2), black carbon (BC), fine particulate matter (PM) such as PM1, PM2.5, PM10, sulfur dioxide (SO2), polycyclic aromatic hydrocarbon (PAH), benzene, ground-level ozone and solid biomass smoke. Results from the review showcased that air pollution has an effect on a high risk of autism spectrum disorders, attention deficit hyperactivity disorder, intellectual disability, behavioral and emotional disorders including depression and psychosis. In addition, studies have also shown that air pollution has serious effects on children's brain development and physical health such as impaired fetal neural development, premature brain imbalance, inflammation, and changes in fetal brain structure. Showing the relationship between air pollution and children's disability may indicate that environmental pollution is considered as a factor that negatively affects the disability etiology and severity. Showing this relationship contributes to promoting environmental protection, reducing pollution including air pollution at national and global scale.

Methionine (Met) is an important building block and metabolite for protein biosynthesis. However, the mechanism behind its absorption in the fish gut has not been elucidated. Here, we describe the fundamental properties of Met transport along trout gut at µmol/L and mmol/L concentration. Both electrogenic and unidirectional DL-[14 C]Met flux were employed to characterize Met transporters in Ussing chambers. Exploiting the differences in gene expression between diploid (2N) and triploid (3N) and intestinal segment as tools, allowed the association between gene and methionine transport. Specifically, three intestinal segments including pyloric caeca (PC), midgut (MG), and hindgut (HG) were assessed. Results at 0-150 µmol/L concentration demonstrated that the DL-Met was most likely transported by apical transporter ASCT2 (SLC1A5) and recycled by basolateral transporter y+ LAT1 (SLC7A7) due to five lines of observation: (1) lack of Na+ -independent kinetics, (2) low expression of B0 AT2-like gene, (3) Na+ -dependent, high-affinity (Km , µmol/L ranges) kinetics in DL-[14 C]Met flux, (4) association mRNA expression with the high-affinity kinetics and (5) electrogenic currents induced by Met. Results at 0.2-20 mmol/L concentration suggested that the DL-Met transport is likely transported by B0 AT1-like (SLC6A19-like) based on gene expression, Na+ -dependence and low-affinity kinetics (Km , mmol/L ranges). Similarly, genomic and gene expression analysis suggest that the basolateral exit of methionine was primarily through LAT4-like transporter (SLC43A2-like). Conclusively, DL-Met uptake in trout gut was most likely governed by Na+ -dependent apical transporters ASCT2 and B0 AT1-like and released through basolateral LAT4-like, with some recycling through y+ LAT1. A comparatively simpler model than that previously described in mammals.

DL-methionine (DL-Met) and its analogue DL-2-hydroxy-4-(methylthio) butanoic acid (DL-methionine hydroxyl analogue or DL-MHA) have been used as nutritional supplements in the diets of farmed raised animals. Knowledge of the intestinal transport mechanisms involved in these products is important for developing dietary strategies. This review provides updated information of the expression, function, and transport kinetics in the intestine of known Met-linked transporters along with putative MHA-linked transporters. As a neutral amino acid (AA), the transport of DL-Met is facilitated by multiple apical sodium-dependent/-independent high-/low-affinity transporters such as ASCT2, B0AT1 and rBAT/b0,+AT. The basolateral transport largely relies on the rate-limiting uniporter LAT4, while the presence of the basolateral antiporter y+LAT1 is probably necessary for exchanging intracellular cationic AAs and Met in the blood. In contrast, the intestinal transport kinetics of DL-MHA have been scarcely studied. DL-MHA transport is generally accepted to be mediated simply by the proton-dependent monocarboxylate transporter MCT1. However, in-depth mechanistic studies have indicated that DL-MHA transport is also achieved through apical sodium monocarboxylate transporters (SMCTs). In any case, reliance on either a proton or sodium gradient would thus require energy input for both Met and MHA transport. This expanding knowledge of the specific transporters involved now allows us to assess the effect of dietary ingredients on the expression and function of these transporters. Potentially, the resulting information could be furthered with selective breeding to reduce overall feed costs.

Using fixed-effect quantile regression for a panel dataset from 2009 to 2015, this study contributes to the literature by examining for the first time the effect of political connections and government support on tax payment in Vietnam. While statistically positive linkages between government support and tax payment have been observed only at high percentiles, private SMEs with politically connected directors make lower tax payments than SMEs without such managers in all percentiles. The results imply that policymakers need to increase effective measures to reduce the adverse effects of political connections on state revenue.

The aim of this study was to identify the unknown transport mechanism of the extensively used monocarboxylate methionine feed supplement DL-methionine hydroxyl analogue (DL-MHA) in rainbow trout intestine. Transport across the pyloric caeca (PC), midgut (MG), and hindgut (HG) regions were kinetically studied in Na+- and H+-dependent manners. Gene expression of monocarboxylate (MCTs) and sodium monocarboxylate transporters (SMCTs) were assessed. Results demonstrated that DL-MHA transport from 0.2–20 mM was Na+-dependent and obeyed Michaelis-Menten kinetics with low affinity in PC & MG in apical/basal pH of 7.7/7.7. Changes in apical/basal pH (6.0/6.0, 6.0/7.7, and 7.7/8.7) had insignificant effects on kinetics. In contrast, HG flux kinetics were only obtained in pH 7.7/8.7 or in the presence of lactate with medium affinity. Additionally, DL-MHA transport from 0 to 150 μM demonstrated the presence of a Na+-dependent high-affinity transporter in PC & MG. Conclusively, two distinct carrier-mediated DL-MHA transport mechanisms along the trout gut were found: 1) in PC & MG: apical transport was regulated by Na+-requiring systems that possibly contained low- and high-affinity transporters, and basolateral transport was primarily achieved through a H+-independent transporter; 2) in HG: uptake was apically mediated by a Na+-dependent transporter with medium affinity, and basolateral exit was largely controlled by an H+-dependent transporter. Finally, two major methionine feed supplements, DL-MHA and DL-methionine (DL-Met) were compared to understand the differences in their bioefficiency. Flux rates of DL-MHA were only about 42.2–66.0% in PC and MG compared to DL-Met, suggesting intestinal transport of DL-MHA was lower than DL-Met.