Being a right parent: a narrative review of the theory and practice of parental involvement in sport parenting.

The family is the first classroom for children and adolescents to learn and grow, and parents' behavior plays an important role in influencing their children's development, which is also evident in the process of sport participation. The main purpose of this study is to summarise the specific theoretical and practical experiences of parents in sport parenting based on a comprehensive review of the types and functions that constitute parental involvement in sport parenting and the process of their practice. To this end, this study used narrative research as the main research method and searched the literature related to parents' involvement in parenting through sport using the Web of Science database. Using the theoretical underpinnings of parents' implementation of sport parenting and their role practice, studies were screened and 39 pieces of literature were finally obtained. The study found that in terms of theoretical underpinnings, the existing types of parental involvement in sport parenting can be broadly categorized into four types: authoritative, authoritarian, permissive and rejecting-neglecting. The functions of parental involvement in sport education have two dimensions: promoting sport development and promoting socialization. Based on a review of their theories, we further summarise and conclude the consequences of action and appropriate practices of parental practices in three scenarios: on the sports field, on the way home and in the private space. It is assumed that parents, when participating in sports parenting, need to: (I) regulate their own behavior in order to avoid psychological pressure on their children due to inappropriate behavior; (II) play different roles at different stages of their children's sports development; (III) should not put too much pressure on their children's performance. Based on these reviews of the theory and practice of parental involvement in sport parenting, this study further examines the theoretical limitations of the established research. It is argued that future research should pay attention to the differences between the identities and expectations of parents or children of different genders about their sport parenting, in addition to the differences in parental involvement in sport parenting and different practices in different cultural contexts.

Input-output balance of cadmium in typical agriculture soils with historical sewage irrigation in China.

The gradual increase of cadmium (Cd) in soils has caused environmental and health risk, and it's important to study the accumulation trend to evoke the awareness of farmland safety management. This research during the period of March in 2017-2018 evaluated the input (irrigation, atmospheric deposition, fertilizer and pesticide application) and the output (runoff and seepage, grain and straw uptake) of Cd in contaminated farmland irrigated with sewage water in Hebei Province. The experimental results indicated sewage irrigation (51.03%), and atmospheric deposition (46.35%) were the main input pathways; Grain uptake (42.72%) and straw removal (50.71%) played a major role in output fluxes. The input-output balance (net transport fluxes) of Cd in the farmland were estimated to be +3621.68 ~ +8899.78 mg·(ha·yr)-1 under different conditions (sewage irrigation with straw returning/straw removal, clean water irrigation with straw returning/straw removal), representing there was a Cd inputting in the farmland during the study. Even in the case of the lowest net transport fluxes, the annual increase of Cd concentration in soils reached to 0.0014 mg/kg. Therefore, it's necessary to take action that cutting off those pathway inputs into farmland ecosystems, such as monitoring the water quality of irrigation water sources, applying fertilizer and pesticide properly. Furthermore, attentions need to be paid to the Cd input into the farmland and environmental risks that may arise while returning straw to the field for improving soil fertility and crop production.

Combining phytoremediation with soil flushing for arsenic removal from contaminated soil.

Arsenic (As) contamination poses a high risk to public health in China. Remediation of soil As contamination is an urgent need. Development of more effective remediation technologies is crucial in order to achieve remediation goals. In this study, pot experiments were carried out to study the As removal effectiveness of planting Pteris vittata L. (P.v.) and Lolium multiflorum L. (L.m.) in combination with in situ soil flushing using monopotassium phosphate (KH2PO4) solutions. Results showed that planting P.v. and L.m. in combination with 8 days of KH2PO4 solution soil flushing achieved 35.20% and 52.93%. As removal efficiency in the rhizosphere soil, respectively, which was significantly higher than 9.14% removal from soil flushing alone. Results also indicated that planting P.v. and L.m. changed the speciation of As to labile form, facilitating As removal from soil. Growing P.v. with in situ KH2PO4 flushing was more effective in remediating As-contaminated agricultural soil; L.m. could not be used in place of P.v to achieve the same remediation efficiency. This research provides an important guidance on plant screening for phytoremediation in combination with in situ flushing to remediate As-contaminated soil.

Ornithine decarboxylase attenuates leukemic chemotherapy drugs-induced cell apoptosis and arrest in human promyelocytic HL-60 cells.

Ornithine decarboxylase (ODC), the rate-limiting enzyme of the polyamine biosynthetic pathway, plays an important role in cell cycle, tumor promotion and anti-apoptosis. In our previous studies, overexpression of ODC prevented apoptosis induced by tumor necrosis factor-alpha and methotrexate. We further investigated the apoptotic mechanisms of the cancer chemotherapeutic drugs, including etoposide (VP-16), paclitaxel (TAX) and cisplatin (CDDP), and the influences of ODC on apoptosis and cell cycle. Our results showed that the investigated drugs induced caspase-dependent apoptosis, the generation of reactive oxygen species (ROS) and the disruption of mitochondrial membrane potential (Deltapsi m) in HL-60 cells, all of which were reversed by putrescine, glutathione or N-acetyl-l-cysteine. Overexpression of ODC prevented the cancer chemotherapeutic drugs-induced apoptosis, ROS generation and the disruption of Deltapsi m. After drug administrations, the decline of Bcl-2, cytochrome c release and caspases' activation were inhibited by ODC overexpression. In cell cycle, ODC overexpressed cells seemed to overcome the G1 arrest and G2/M arrest, caused by VP-16 and TAX, respectively, and kept on the cell cycle rolling. Overexpression of ODC increased the expression of Cyclin A, D, E and Cdk4 and the enzyme activity of Cdk1 and Cdk2 after the treatment of VP-16 and TAX, respectively. In conclusions, the cancer chemotherapeutic drugs-induced apoptosis is through ROS-related, mitochondria-mediated and caspase-dependent pathways. With higher ODC activity, cells are resistant to the cancer chemotherapeutic drugs-induced apoptosis and keep on the cell cycle rolling with the significant interference in G1/S arrest caused by VP-16 and G2/M arrest by TAX.