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\nHighlightsZeolites are widely used in fields such as separation and catalysis due to their unique pore structure. However, the complexity of its crystallization process and growth mechanism presents challenges for the research and exploitation of novel zeolites. In order to achieve the development of new zeolites with specific structures and properties, this study delves into the key factors in zeolite synthesis and dealumination processes, as well as their impact on zeolite synthesis, from the perspective of changes in silicon and aluminum. It was found that selecting silicon and aluminum sources with high activity and high specific surface area could achieve the best dissolution effect, and the suitable alkalinity could help to enhance the solubility and reactivity of silicon and aluminum sources, which in turn could improve the crystallinity and yield of zeolite. Prolonging the crystallization time and increasing the crystallization temperature can accelerate the nucleation and growth of aluminosilicate gel and reduce the anticrystallization phenomenon. In addition, precise control of the pore structure of zeolite can be achieved by controlling the selection of template agents and the conditions of dealumination treatment, thereby improving the application performance of zeolite. In this study, we reveal the deep connection between influence factors, zeolite synthesis, and silicon-aluminum variations, which provides new perspectives and methods for the exploitation and application of novel zeolites. Meanwhile, through a deep understanding of the mechanism of influence factors on zeolite synthesis, it is able to target and regulate the synthesis conditions to achieve the desired zeolite structure and properties, which not only improves the efficiency and cost effectiveness of the synthesis, but also establishes a solid foundation for the further development and wide application of zeolites. Clarified the migration and conversion of silica-aluminum in zeolite synthesisSummarized the dealumination of zeolite by different post-treatment methodsCoupled synthesis and post-treatment to construct high-silica zeolite withhierarchical poreClarified the migration and conversion of silica-aluminum in zeolite synthesisSummarized the dealumination of zeolite by different post-treatment methodsCoupled synthesis and post-treatment to construct high-silica zeolite withhierarchical pore [ABSTRACT FROM AUTHOR]

Background and Aim: Due to the incomplete development of the immune system in immature piglets, the respiratory tract is susceptible to invasion by numerous pathogens that cause a range of potential respiratory diseases. However, few studies have reported the changes in pig lung microorganisms during respiratory infection. Therefore, we aimed to explore the differences in lung environmental microorganisms between healthy piglets and piglets with respiratory diseases., Materials and Methods: Histopathological changes in lung sections were observed in both diseased and healthy pigs. Changes in the composition and abundance of microbiomes in alveolar lavage fluid from eleven 4-week-old Chinese Kele piglets (three clinically healthy and eight diseased) were studied by IonS5™ XL sequencing of the bacterial16S rRNA genes., Results: Histopathological sections showed that diseased pigs displayed more lung lesions than healthy pigs. Diseased piglets harbored lower bacterial operational taxonomic units, α-diversity, and bacterial community complexity in comparison to healthy piglets. Taxonomic composition analysis showed that in the diseased piglets, the majority of flora was composed of Ureaplasma , Mycoplasma , and Actinobacillus ; while Actinobacillus , Sphingomonas , and Stenotrophomonas were dominant in the control group. The abundance of Ureaplasma was significantly higher in ill piglets (p<0.05), and the phylogenetic tree indicated that Ureaplasma was clustered in Ureaplasma diversum , a conditional pathogen that has the potential to affect the swine respiratory system., Conclusion: The results of this study show that the microbial species and structure of piglets' lungs were changed during respiratory tract infection. The finding of Ureaplasma suggested that besides known pathogens such as Mycoplasma and Actinobacillus , unknown pathogens can exist in the respiratory system of diseased pigs and provide a potential basis for clinical treatment., (Copyright: © Zhang, et al.)

Objective: To observe the impact of transcutaneous electrical acupoint stimulation (TEAS) before and after embryo transfer for the pregnancy of in vitro fertilization-embryo transfer (IVF-ET) patients., Methods: A total of 1761 IVF-ET patients of natural cycle or hormone replacement cycle were randomly assigned into an observation group (735 cases) and a control group (1026 cases). IVF-ET was applied in the two groups. TEAS was used for 30 min separately in the observation group on 24 h before transfer and within 2 h after transfer. The acupoints were Zigong (EX-CA 1), Xuehai (SP 10) and Diji (SP 8); Zhongwan (CV 12), Guanyuan (CV 4), Zusanli (ST 36) and Taixi (KI 3). TEAS was not used in the control group. Biochemical pregnancy rate and clinical pregnancy rate were observed 14 d and 4-5 weeks after transfer in the two groups., Results: The biochemical pregnancy rate in the observation group was 62.0% (456/735), which was better than 57.3% (588/1026) in the control group ( P <0.05). The clinical pregnancy rate in the observation group was 51.2% (376/735), and it was better than 44.9% (461/1026) in the control group ( P <0.05)., Conclusions: TEAS could improve the pregnancy rate of IVF-ET patients, and it may be a safe and new assisted method for reproduction without pain.