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The discovery of has inspired new interest in studying doubly heavy baryons. In this study, the weak decays of a doubly charmed baryon to a light baryon and a charm meson (either a pseudoscalar or a vector one) are calculated. Following our previous work, we calculate the short distance contributions under the factorization hypothesis, whereas the long distance contributions are modeled as the final state interactions, which are calculated with the one particle exchange model. We find that the decays' branching ratios are obviously larger, as they receive contributions of more polarization states. Among the decays that we investigate, the following have the largest branching fractions: estimated with fs; and with fs; and , , and with fs. By comparing the decay widths of pure color commensurate channels with those of pure bow-tie ones, we find that the bow-tie mechanism plays an important role in charm decays.

Background China has a large volume of inter-provincial migrants, accounting for more than 11% of the total population. The economic benefits of inter-provincial migration have been well studied, whereas the health impacts related to environmental factors are generally ignored. Methods In this study, we use 1% national population sampling survey data from 2015 and daily PM2.5 (particles ≤ 2.5 µm in aerodynamic diameter) concentration data from 360 cities to analyze the health benefits associated with air pollution due to inter-provincial migration. The exposure-response function was used to estimate the economic value of these health benefits via the adjusted-human-capital and cost-of-illness methods. Results Considering a full-exposure scenario, inter-provincial migration resulted in a reduction in the PM2.5 exposure concentration of 3.94 µg/m3 in 2015, corresponding to a reduction of 6114 premature deaths, 233.4 thousand hospitalization cases, and 1.5 million asthma attacks. The corresponding economic value of these health benefits was about 10.44 billion yuan (0.02% of the national GDP in 2015). A protection scenario, assuming that the migrants protected themselves from air pollution, showed very similar results to the full-exposure scenario (PM2.5 exposure reduced by 3.60 µg/m3); hence, personal protection does not reduce significantly the health risks of air pollution. Conclusions At the national level, the labor force obtains both economic and health benefits. However, a high number of migrants flow out of the central region of China result in a labor deficiency and social imbalance. Migration to large cities provides economic benefits at the expense of health. Environmental migration becomes an increasingly important motivation for inter-provincial migration, which places new pressure on policy makers to consider social welfare and environmental protection in the provinces.

China faces the dual challenge of mitigating climate change and preventing air pollution. The coordinated control of both problems has become an issue of widespread concern. This study combined environmentally extended input-output analysis and structural path analysis to analyze the CO2, SO2, NOx, black carbon, and PM2.5 emissions embodied in the production supply chain of China in 2012. The results showed that electricity and heat production, nonmetallic mineral products along with the smelting and pressing of metal were primary sources of environmental emissions from the production perspective, and construction contributed 20–38% relevant emissions from the consumption perspective. Among the 100 largest paths, 22 common critical paths accounted for 16–37% of relevant emissions, meaning that measures focusing on these shared paths will have obvious co-controlling effects. These 22 critical supply chains were mainly driven by fixed capital formation and exports. The dominant sectors included the construction, electricity and heat production, transportation and storage, and construction-materials production (nonmetallic mineral products, smelting and pressing of metal). Therefore, measures from the production-side and the consumption-side should be given equal attention to effectively co-control such emissions. Measures to decrease energy intensity, thus reducing end-of-pipe discharge in these sectors, rather than to remove specific pollutants, represent the most promising production-related measures. Moreover, slowing construction growth by guiding investments and encouraging the use or export of products with lower emissions using environmental information labels are essential consumption-related policies.

Solvothermal reactions of metal salts, 3-amino-1,2,4-triazole-5-carboxylic acid (H2atzc) and ammonium oxalate in different temperature produced two metal azolate frameworks, namely, [Cu3(atzc)2(atz)(ox)]·1.5H2O (1) and [Co5(atz)4(ox)3(HCOO)2]·DMF (2) (H2atzc=3-amino-1,2,4-triazole-5-carboxylic acid, Hatz=3-amino-1,2,4-triazole, and ox=oxalate), in which the atzc precusor was in situ decarboxylated. Structural determination reveals that 1 contains [Cu3(atzc)2(atz)]2− layers of mixed μ4-atzc and μ3-atz ligands, which are pillared by ox2− groups to form a 3D porous framework. Compound 2 contains 2D layers with basic spindle-shaped decanuclear units, which extended by ox2− and formates to form 3D porous framework. Gas adsorption investigation revealed that two kinds of frameworks exhibited selective CO2 over N2 sorption. Moreover, activated 2 shows H2 storage capacity. Additionally, magnetic properties of both the compounds have been investigated.

In the title compound, [Fe(C6H12NO5)2], the FeIIion lies on an inversion center and is coordinated by two N atoms and four O atoms from two tridentateN-[2-hydroxy-1,1-bis(hydroxymethyl)ethyl]glycine ligands, forming a slightly distorted octahedral coordination environment. In the crystal, O—H...O, O—H...N and weak C—H...O hydrogen bonds link molecules, forming a three-dimensional network.