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{"title":"Utilization of vivianite as a slow-release phosphorus fertilizer: efficiency and mechanisms","authors":"Muzhi Sha,&nbsp;Yunlong Wang,&nbsp;Junpeng Diao,&nbsp;Sigal Savaldi-Goldstein,&nbsp;Qian Wang","doi":"10.1186/s40538-025-00837-4","DOIUrl":"10.1186/s40538-025-00837-4","url":null,"abstract":"<div><h3>Background</h3><p>Vivianite is an intensively studied phosphorus (P) recovery product from wastewater treatment plants. However, its downstream application has not been well-addressed thus restricting P cycling. This study investigated the P fertilizer efficiency of vivianite in pot experiments using ryegrass (<i>Lolium multiflorum</i> L.) and tomato (<i>Solanum lycopersicum</i> L.) with two soilless growing media (perlite and quartz). The variation of vivianite during fertilization was examined to elucidate the mechanisms of P release from vivianite, using a recently developed sequential P extraction protocol coupled with light microscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM) coupled with energy dispersive X-ray spectroscopy (EDS).</p><h3>Results</h3><p>The mineral fertilizer equivalence (MFE) of vivianite was determined by comparing the P uptake by plants under vivianite treatment to that under mineral P fertilizer treatment, i.e., Ca(H₂PO₄)₂ in this study. It shows that the vivianite-P uptake of ryegrass was positively correlated with time in a 3-month period and its uptake in quartz was faster than that in perlite, leading to a higher MFE of vivianite in quartz than in perlite (15.8–20.3% vs 6.6–7.4%). This should be attributed to the higher P adsorption capacity and lower hydraulic conductivity of perlite, which restricted the vivianite-P dissolution and mobility. The vivianite variation revealed that vivianite-P was mainly released upon vivianite oxidation to ferric (hydr)oxides in perlite, probably given the high aeration condition in this type of growing medium. In quartz, however, the release of vivianite-P was most likely due to vivianite dissolution driven by the plant uptake of P, during which a higher plant uptake of Fe was observed than that in perlite.</p><h3>Conclusions</h3><p>The findings reveal that vivianite can serve as a slow-release P fertilizer, and its fertilizer efficiency is highly related to the properties of the growing media. Quartz is a preferred growing medium over perlite for the efficient fertilization of this sparingly soluble P source. The findings deepen the understanding of P fertilization of vivianite and lay foundation to its utilization as a slow-release P fertilizer for a circular economy of P.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":512,"journal":{"name":"Chemical and Biological Technologies in Agriculture","volume":"12 1","pages":""},"PeriodicalIF":5.2,"publicationDate":"2025-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://chembioagro.springeropen.com/counter/pdf/10.1186/s40538-025-00837-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144858583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Empirical charge model taking into account the inductive effect to describe electrostatic interactions in compounds relevant to medicinal chemistry: assessment of applicability","authors":"V. S. Frolov,&nbsp;D. A. Shulga,&nbsp;A. R. Shaimardanov,&nbsp;V. A. Palyulin","doi":"10.1007/s11172-025-4684-5","DOIUrl":"10.1007/s11172-025-4684-5","url":null,"abstract":"<div><p>The applicability of the empirical charge model DENR (dynamic electronegativity relaxation) accounting for the inductive effect to the description of electrostatic interactions in compounds relevant to medicinal chemistry was assessed. Using a representative set of biologically relevant molecules selected from the PDBbind refined set, parameters of the DENR model were optimized to achieve the best fit to the reference molecular electrostatic potential (MEP) values calculated at the RHF/6-31G* level of theory. The results obtained using the DENR model and certain popular charge models aimed at reproducing the quantum chemical MEP values at RHF/6-31G* were compared. The cases were established where the DENR model provides better description of the electrostatic component of the energy of molecular interactions than the models that do not include the inductive effect. The scope of applicability of the DENR model was determined.</p></div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"74 7","pages":"1992 - 2006"},"PeriodicalIF":1.7,"publicationDate":"2025-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144853570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis and spectral properties of zinc and magnesium phthalocyaninates containing diazenylphenoxy groups","authors":"T. V. Tikhomirova,&nbsp;A. N. Bychkova,&nbsp;A. A. Shishlova,&nbsp;A. S. Vashurin","doi":"10.1007/s11172-025-4690-7","DOIUrl":"10.1007/s11172-025-4690-7","url":null,"abstract":"<div><p>Optimum conditions were selected for the preparation of new phenols: azo dyes of various compositions, namely, 2-phenyldiazenyl-4-(2-phenylpropan-2-yl)phenol and (2,6-dibromo)phenyldiazenyl-4-(2-phenylpropan-2-yl)phenol. Nucleophilic substitution with 3- and 4-nitrophthalonitrile was carried out using the synthesized dyes to form 3/4-[2-phenyldiazenyl-4-(2-phenylpropan-2-yl]phenoxy- and 3/4-[2-(2,6-dibromo)-phenyl)diazenyl]-4-(2-phenylpropan-2-yl)phenoxyphthalonitriles. The metal complexes were synthesized by template condensation in a solution of the corresponding phthalonitrile with zinc or magnesium acetate. The compositions and structures of the synthesized compounds were confirmed by mass spectrometry and NMR, IR, and electronic absorption spectroscopy. The spectral and luminescence properties were studied, the yield of singlet oxygen generation of the synthesized phthalocyanines was determined, and the acid-base properties of the synthesized complexes were investigated.</p></div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"74 7","pages":"2052 - 2061"},"PeriodicalIF":1.7,"publicationDate":"2025-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144853521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Gallium complexes based on aminobisphenol ligands","authors":"G. A. Khromov,&nbsp;S. V. Timofeev,&nbsp;B. N. Mankaev,&nbsp;K. A. Lyssenko,&nbsp;S. S. Karlov","doi":"10.1007/s11172-025-4691-6","DOIUrl":"10.1007/s11172-025-4691-6","url":null,"abstract":"<div><p>A series of aminobisphenol ligands containing different substituents both on the aromatic moieties and at the central nitrogen atom were synthesized by the Mannich reaction. The reaction of dilithium derivatives of these ligands with gallium trichloride affords the corresponding ONO-type gallium monochloride complexes. The replacement of the chlorine atom by a <i>tert</i>-butoxide moiety allows the preparation of reactive complexes, which efficiently initiate the ε-caprolactone polymerization. The activity of the synthesized complexes as polymerization initiators was studied. The structures of three aminobisphenols and three gallium complexes were determined by X-ray diffraction.</p></div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"74 7","pages":"2062 - 2080"},"PeriodicalIF":1.7,"publicationDate":"2025-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144853522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of the medium on the pathway of the reaction of S-(1S,2R,3S,5R)-2-formyl-6,6-dimethylnorpinan-3-yl thioacetate with chlorine dioxide","authors":"O. M. Lezina,&nbsp;S. N. Subbotina,&nbsp;O. N. Grebyonkina,&nbsp;D. P. Gerasimova,&nbsp;O. A. Lodochnikova,&nbsp;S. A. Lisovskaya,&nbsp;S. A. Rubtsova,&nbsp;A. V. Kutchin","doi":"10.1007/s11172-025-4692-5","DOIUrl":"10.1007/s11172-025-4692-5","url":null,"abstract":"<div><p>The reaction of <i>S</i>-(1<i>S</i>,2<i>R</i>,3<i>S</i>,5<i>R</i>)-2-formyl-6,6-dimethylnorpinan-3-yl thioacetate with chlorine dioxide in a pyridine—water solution was studied. The oxidative cleavage of the C—C bond between the carbonyl carbon and α-carbon atoms of the starting 2-formyl thioacetate of the pinane structure afforded new polyfunctional derivatives, (3<i>S</i>)- and (3<i>R</i>)-2-keto-3-sulfonic acids and 2-keto-3-chloro-3-sulfonic acid. The structure of the latter compound was determined by X-ray diffraction. The antifungal activity of the starting thioacetate and its keto derivative was evaluated against micellar forms of the fungi <i>Aspergillus niger</i> and <i>Fusarium oxysporum</i> and the yeast fungi of the genus <i>Candida</i>.</p></div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"74 7","pages":"2081 - 2091"},"PeriodicalIF":1.7,"publicationDate":"2025-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144853523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"α-Alkyl-α-nitro ketones as 1,2- and 1,1-biselectrophiles. Synthesis of benzoxazoles, benzimidazoles, and quinoxalines","authors":"A. V. Aksenov,&nbsp;I. Yu. Grishin,&nbsp;V. V. Malyuga,&nbsp;D. A. Aksenov,&nbsp;R. G. Dzhioeva,&nbsp;N. A. Aksenov","doi":"10.1007/s11172-025-4695-2","DOIUrl":"10.1007/s11172-025-4695-2","url":null,"abstract":"<div><p>The reactivity of α-alkyl-α-nitroacetophenones with 1,2-phenylenediamines and <i>o</i>-aminophenols in acidic medium was examined. The reaction pathway depends on the catalyst used and provides access to the corresponding benzoxazoles, benzimidazoles, and quinoxalines <i>via</i> the aza-Nef-type reaction.</p></div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"74 7","pages":"2114 - 2124"},"PeriodicalIF":1.7,"publicationDate":"2025-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144853526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of Industrial and Domestic Wastewater Treatment Plants on Microplastic Pollution in an Urban River in Türkiye","authors":"Neval Baycan,&nbsp;Nefise Alyürük,&nbsp;Yiğithan Kazancı,&nbsp;Cumana Alpergün,&nbsp;Nursena Kara,&nbsp;Özge Taşdelen,&nbsp;Ülgen Aytan,&nbsp;Orhan Gündüz","doi":"10.1007/s11270-025-08469-y","DOIUrl":"10.1007/s11270-025-08469-y","url":null,"abstract":"<div><p>Microplastic (MP) contamination in inland aquatic systems is a growing environmental concern due to its persistence and potential ecological impacts. This study provides a comprehensive assessment of the occurrence, composition, and seasonal dynamics of MPs in two urban rivers—Nif Creek and Gediz River—in western Türkiye, which receive treated and untreated effluents from domestic and industrial wastewater treatment plants (WWTPs). A total of 20 river water and 3 sediment sampling stations were monitored across four seasons. MP concentrations ranged from 7 to 146 particles/L in water and from 9,867 to 136,177 particles/kg in sediments, with the highest abundances observed near WWTP outfalls and urban infrastructure. Polypropylene was the dominant polymer in water (59.1%) and WWTP effluents (44.4%), while polyethylene was most prevalent in sediments (60.2%). MPs were primarily within the 0.1–0.5 mm size range and were predominantly transparent in colour. Statistical analyses indicated significant positive correlations between MP abundance and key water quality parameters, including chemical oxygen demand, total suspended solids, and selected heavy metals (e.g., Zn, Cd, Ni). The polymeric composition of MPs reflected both urban and industrial sources, with variations in polymer profiles linked to spatial and seasonal factors. Compared to values reported in European freshwater systems, MP levels in the studied rivers were considerably higher, underscoring the need for improved wastewater management and targeted monitoring efforts in urban river basins.</p></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"236 12","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144853604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of alkylammonium halides for the reaction of CO2 addition to oxiranes","authors":"S. E. Lyubimov,&nbsp;P. V. Cherkasova","doi":"10.1007/s11172-025-4680-9","DOIUrl":"10.1007/s11172-025-4680-9","url":null,"abstract":"<div><p>The review presents analysis of most important publications addressing the efficiency of alkylammonium halides in the addition of CO₂ to oxiranes.</p></div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"74 7","pages":"1940 - 1957"},"PeriodicalIF":1.7,"publicationDate":"2025-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144853614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Controlled synthesis of easily degradable polymers via the radical copolymerization of cyclic ketene acetals with vinyl monomers","authors":"M. Yu. Zaremski,&nbsp;E. E. Aliev,&nbsp;N. S. Goulioukina,&nbsp;A. V. Plutalova","doi":"10.1007/s11172-025-4700-9","DOIUrl":"10.1007/s11172-025-4700-9","url":null,"abstract":"<div><p>Opportunities of the controlled synthesis of easily degradable polymers were analyzed for the copolymerization of vinyl monomers with cyclic ketene acetals. Features of a new type of synthesis of easily degradable polymers <i>via</i> the radical copolymerization of vinyl monomers with cyclic ketene acetals were evaluated using copolymerization of styrene with 2-methylene-1,3-dioxepane as the model example. Upon the polymerization of those cyclic ketene acetals, the ring was opened forming the ester groups, which resulted in “weak” units capable of hydrolysis and biodegradation in the polystyrene (PS) chain. Kinetic features were estimated for the copolymerization. The possibility of controlled synthesis of PS according to the method of reversible inhibition with the participation of TEMPO nitroxide was demonstrated. The composition and molecular weight characteristics were estimated for the products. Their destruction upon hydrolysis in an alkaline medium was confirmed.</p></div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"74 7","pages":"2169 - 2175"},"PeriodicalIF":1.7,"publicationDate":"2025-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144853567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Standard enthalpies of formation of organometallic compounds of the I–VI and VIII group elements of the Periodic Table: correlation analysis of the influence of substituents","authors":"N. M. Khamaletdinova,&nbsp;O. V. Kuznetsova,&nbsp;A. N. Egorochkin","doi":"10.1007/s11172-025-4683-6","DOIUrl":"10.1007/s11172-025-4683-6","url":null,"abstract":"<div><p>Published results on the standard enthalpies of formation (Δ_<i>f</i><i>H</i>°) of 22 narrow series of compounds of the I–VI and VIII group elements of the Periodic Table are analyzed. When these compounds are formed from simple substances, an excess charge appears on the reaction center, inducing a dipole in the substituent, which leads to an ion-dipole interaction (polarizability effect). It is shown for the first time that the thermodynamic characteristic Δ_<i>f</i><i>H</i>° depends not only on classical (inductive, resonance, and steric) effects, but also on the polarizability effect of the substituents. In some series, the polarizability effect demonstrates the dominant influence on Δ_<i>f</i><i>H</i>°.</p></div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"74 7","pages":"1986 - 1991"},"PeriodicalIF":1.7,"publicationDate":"2025-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144853565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}