Acid Sulfate Research Articles

Chitosan-Salicylic acid and Zinc sulphate nano-formulations defend against yellow rust in wheat by activating pathogenesis-related genes and enzymes

Stripe rust instigated by Puccinia striiformis f. sp. tritici causes major yield loss in wheat. In this study, disease resistance was induced in wheat by pre-activation of pathogenesis related (PR) genes using two different nano-formulations (NFs) i.e. Chitosan- Salicylic acid (SA) NFs (CH-NFs) and Zinc sulphate NFs (Zn-NFs). These NFs were synthesized using green approach and were characterized using various techniques. Both NFs effectively controlled stripe rust in wheat genotypes (WH 711 and WH 1123) by significantly increasing activities of phenylalanine ammonia lyase, tyrosine ammonia lyase and polyphenol oxidase enzymes when compared with disease free-control and diseased plants. Total soluble sugar (TSS) level was highest in CH–NF treated plants. TSS was also relatively higher in diseased plants than disease free-control as well as Zn–NF treated plants. Both CH-NFs and Zn-NFs induced the expression of PR genes. In CH–NF treated plants, the relative expression of PR genes was higher on the 3rd day after spraying (DAS) of NFs as compared to diseased and Zn–NF treated plants in both the genotypes. While in case of Zn–NF treated plants, relative expression of PR genes was higher on 5th DAS as compared to diseased and disease free-control plants. Early rise in expression of PR genes due to NF treatments was responsible for disease resistance in both the wheat genotypes as evidenced by a lower average coefficient of infection. These NFs can be synthesized easily with low cost input, are eco-friendly and can be effectively used against yellow rust as well as other wheat diseases.

Efficacy of an esophageal mucosal protectant in the treatment of patients with gastroesophageal reflux disease: a systematic review

Gastroesophageal reflux disease (GERD) is one of the most widespread gastrointestinal pathologies and the most common reason for seeking medical care at the level of a primary link of public health services in many countries around the world. The classic clinical presentations of GERD are heartburn, belching, and regurgitation (spitting up), but the overall spectrum of GERD symptoms is broader and more heterogeneous in scope, including extraesophageal symptoms. Clinical and/or endoscopic refractoriness of some patients to the standard proton pump inhibitors (PPIs) therapy remains a global challenge in the management of patients with GERD at the current stage of clinical medicine development. A medicinal product of a fundamentally new class was developed to optimize the treatment of patients with GERD – an esophageal mucosal protectant, which consists of a fixed combination of hyaluronic acid and chondroitin sulfate dissolved in a bioadhesive carrier (polymerase 407). This review is primarily aimed at systematizing data on the efficacy of the esophageal mucosal protectant in the treatment of patients with GERD. The systematic review that summarized the results of 10 studies involving 1090 patients with GERD showed that adding this esophageal mucosal protectant to the PPI therapy increased the efficacy of GERD therapy, as well as improved the frequency of symptomatic, endoscopic and morphological response to the treatment. Such combination therapy contributes to the optimization of the treatment of patients with various disease phenotypes, regress of both esophageal and extraesophageal symptoms, and potentiation of repair of the esophageal mucosa. To increase the efficacy of treatment and improve the prognosis of the disease, this approach should be implemented at the early stages of therapy in real clinical practice.

Harmless Effect of Sulfuric Acid and Aluminum Sulfate on Barium Slag

Harmless Effect of Sulfuric Acid and Aluminum Sulfate on Barium Slag

Iron‑sulfur geochemistry and acidity retention in hydrologically active macropores of boreal acid sulfate soils: Effects of mitigation suspensions of fine-grained calcite and peat

Acid sulfate soils discharge large amounts of sulfuric acid along with toxic metals, deteriorating water quality and ecosystem health of recipient waterbodies. There is thus an urgent need to develop cost-effective and sustainable measures to mitigate the negative effects of these soils. In this study, we flushed aseptically-prepared MQ water (reference) or mitigation suspensions containing calcite, peat or a combination of both through 15-cm-thick soil cores from an acid sulfate soil field in western Finland, and investigated the geochemistry of Fe and S on the surfaces of macropores and in the solid columnar blocks (interiors) of the soil columns. The macropore surfaces of all soil columns were strongly enriched in total and HCl-extractable Fe and S relative to the interiors, owing to the existence of abundant Fe oxyhydroxysulfates (schwertmannite and partly jarosite) as yellow-to-brownish surface-coatings. The dissolution/hydrolysis of Fe oxyhydroxysulfates (predominantly jarosite) on the macropore surfaces of the reference columns, although being constantly flushed, effectively buffered the permeates at pH close to 4. These results suggest that Fe oxyhydroxysulfates accumulated on the macropore surfaces of boreal acid sulfate soils can act as long-lasting acidification sources. The treatments with mitigation suspensions led to a (near-)complete conversion of jarosite to Fe hydroxides, causing a substantial loss of S. In contrast, we did not observe any recognizable evidence indicating transformation of schwertmannite. However, sulfate sorbed by this mineral might be partially lost through anion-exchange processes during the treatments with calcite. No Fe sulfides were found in the peat-treated columns. Since Fe sulfides can support renewed acidification events, the moderate mineralogical changes induced by peat are desirable. In addition, peat materials can act as toxic-metal scavengers. Thus, the peat materials used here, which is relatively cheap in the boreal zone, is ideal for remediating boreal acid sulfate soils and other similar jarosite-bearing soils.

Microbial Acid Sulfate Weathering of Basaltic Rocks: Implication for Enzymatic Reactions

Microbial Acid Sulfate Weathering of Basaltic Rocks: Implication for Enzymatic Reactions

Evaluation of the Ability to Treat Saline and Acid Sulfate Soils of Biochar from Rice Husks in Greenhouse Conditions

The purposes of this study were to i) Examine the dynamics of physicochemical parameters of saline acid sulfate soil as influenced by biochar made from rice husk; and ii) Evaluate the influence of biochar on the soil quality index. A greenhouse experiment was carried out by mixing biochar with the tested soil at ratios of 0; 0.7; 1.5; 3, and 6% (w/w) and incubating for 100 days. Experimental soil samples were taken on days 5, 15, 30, 60, and 100 to analyze for 11 physicochemical parameters. The soil quality index (SQI) was calculated based on the principal component/factor analysis (PCA/FA). The results showed that biochar increased the exchangeable concentration of K, Mg, Ca, and pH value while reducing the exchangeable concentration of Fe, and Al, as well as the values of Cl-, H+, and exchange acidity in the soil. Biochar changed the electrical conductivity (EC) and Na parameters, increasing them in the first few measurements while decreasing them in the last measurements. Biochar increased the SQI of the tested soil, even with a low biochar application rate of 0.7% after 100 days of the experiment. The study suggests that biochar made from rice husk could be a potential amendment for ameliorating saline acid sulfate soil.

Synthesis and physical characterization of oleyl oleate using acidic heterogeneous catalyst sodium hydrogen sulfate NaHSO4

The esterification of oleic acid with oleyl alcohol under mild conditions and without any additional organic solvent was studied. High yield (90%) is obtained at optimized conditions 8 h, 130 °C and catalytic amount NaHSO4 (10%). Analysis of the product of the reaction using FTIR, 1H and 13C-NMR showed the presence of oleyl oleate.

Promotion of High-Speed Copper-Filling Performance for Interconnections with Increasing Aspect-Ratio Using Compound Additives.

Interconnections are essential for integrating the packaging substrate, and defect-free copper-filling can further improve the reliability in through holes (THs). The coating properties and filling processes are mainly dominated by the interplays among additives in the direct current electroplating. The acidic copper sulfate electroplating solution contained three typical convection-dependent additives and chloride ions (Cl−). The THs with aspect ratios (ARs) of 6.25, 5, and 4.17 (thickness of 500 μm) were selected as the study subjects. The effects of Cl− and ARs on the interactions among the additives were investigated in detail using electrochemical measurements, which were verified by the THs filling experiments. The additive compounds present a convection enhanced inhibition effect and cathodic polarization, leading to a copper filling capacity increase with ARs and the amelioration of copper compactness and corrosion resistance. The defect-free copper filling of THs and a uniform mirror bright surface circuit can be achieved simultaneously using compound additives at a relatively high speed.

Comment on “Kawahara, H., Yoshida, H., Yamamoto, K., Katsuta, N., Nishimoto, S., Umemura, A., Kuma, R., 2022. Hydrothermal formation of Fe-oxide bands in zebra rocks from northern Western Australia. Chemical Geology 590 (2022), 120699”

This comment questions an hypothesis for formation of the ornamental stone “zebra rock” from Ediacaran red shales of northwestern Australia as hydrothermal alteration zones. The hypothesis is falsified by absence of Eu anomalies in REE arrays, lack of associated carbonate, low degree of chemical weathering, associated soluble gypsum, strata concordance in narrow bands, low thermal stability of magnetization, modest diagenetic alteration, and patterns unlike liesegang banding. Rather than Cambrian hydrothermal veins, zebra rocks were gleyed paleosols with redox banding, from acid sulfate weathering at low temperature during the Ediacaran.

Advanced natural hydrated iron-alum oxides cation exchange resin for simultaneous phosphate and hardness removal

In this study, a hydrated iron-alum oxides-contained cation exchange resin (HIAO/225H) was synthesized for the first time from natural alum-ferric water of acid sulfate soil to improve the water quality. The HIAO/225H material was then characterized by FTIR, XRD, SEM, and EDX-mapping techniques and applied for phosphate and hardness removal tests. The phosphate removal by the HIAO/225H material reached equilibrium after 50 h with the highest adsorption capacity of 2.075 mg P g−1 (e.g., 69.16 mg P g−1 Fe) at pH 6, which was 1.12, 11.15, and 2.11 times higher than by hydrated ferric oxide/225H material, anion exchange resin (Akualite A420), and amphoteric ion exchange resin (MB6SR), respectively, under the same experimental conditions. The reason for the higher phosphate adsorption efficiency of HIAO/225H than the hydrated ferric oxide/225H material may be that HIAO contains Ca, Mg, and Al elements, leading to an easy formation of FeOOH on the surface. Particularly, HIAO/225H material was also effective for both hardness and phosphate removal with an adsorption capacity of 15.6 mg Ca g−1, 9.4 mg Mg g−1, and 1.825 mg P g−1, which is higher 1.2 times than the phosphate removal only. This may be due to co-precipitation to form Ca3(PO4)2 and Mg3(PO4)2 with the support of cation exchange resins. These results showed that the HIAO/225H material has a good performance in removing both phosphate and hardness, which could be applied in practical water and advanced wastewater treatment.

Phase equilibria in the (NH4)2SO4 – Rb2SO4 – H2SO4 – H2O system

In isothermal conditions (25 °C) phase equilibria are researched in the (NH4)2SO4 – Rb2SO4 – H2SO4 – H2O system. Concentration limits of the solid solutions crystallization with general formulas of ((NH4)xRb1 -x)2SO4, ((NH4)xRb1 -x)3H(SO4)2 and (NH4)xRb1 -xHSO4 are determined. Conditions of obtaining massive single crystals of ammonium and rubidium complex acid sulfates are determined.

Anisotropic polymer membranes retaining nanolayered hydrogen sulfate anions for enhanced anhydrous proton conduction

Ionic liquids bearing acidic anions are intrinsically proton-conductive but mechanically weak for device application. Maintaining ionic conductivities after solidifying ionic liquids by polymerization remains a challenge due to the restriction of ion mobility. In this work, nanolayered ionic membranes bearing aligned acidic hydrogen sulfate anions are prepared from ionic liquid crystals for enhanced anhydrous proton conduction. To obtain polymerizable smectic assemblies, 3-tetradecyl-1-vinyl-imidazolium hydrogen sulfate as monomer and 3, 3'-(decane-1,10-diyl) bis(1-vinyl-imidazolium) hydrogen sulfate as cross-linker are synthesized. In situ polymerization of the ionic assemblies in the smectic phase results in robust membranes retaining nanolayered acidic anions. The nanolayered ionic membranes exhibit tensile strengths up to 16.6 MPa and keep thermally stable at temperatures up to 220 °C. Anhydrous conductivity of the aligned ionic membrane reaches a maximum of 22 mS cm−1 and follows the Arrhenius law. A peak power density of 71.5 mW cm−2 is achieved at 110 °C for the fuel cell constructed from the nanolayered ionic membrane under non-humidified conditions.

OH Group Orientation Leads to Organosulfate Formation at the Liquid Aerosol Surface.

Organosulfates (OSs) are well-known and ubiquitous constituents of atmospheric aerosol particles and have been used as secondary organic aerosol markers in many field studies. Hence, it is imperative to understand the formation of OS species in the atmosphere. Recently, hydroxy acids (HAs) and hydroxy acid sulfates have been extensively detected in the atmospheric environment. However, the reaction mechanism of HAs to form OSs is much less understood. In this work, we have mainly investigated the reaction of typical α-HAs, including glycolic acid (GA) and lactic acid (LA), and SO3 at the liquid aerosol surface using quantum chemistry calculations and Born-Oppenheimer molecular dynamics simulations. The OH group orientation of α-HAs at the air-water interface is found to exert a significant impact on the formation of OSs. The OH group pointing to the gas phase is obviously beneficial to the formation of OSs. Two key factors are discovered important to the reaction of α-HAs adsorbed on the liquid surface with SO3: (a) the exposure position of the active site to the gas phase and (b) the reactivity of the exposed site to the attracted SO3 molecule. Moreover, we found that the air-water interface exerts a significant influence on the physicochemical behaviors of GA and LA, especially on their OH group orientation, and thus leads to their different properties for the SO3 colliding reaction. The presented reaction mechanism provides a new feasible pathway for the production of OSs at the liquid aerosol surface, which may have important impacts on the formation of organic aerosols.

Evaluation of the efficacy of 1 L polyethylene glycol plus ascorbic acid and an oral sodium sulfate solution: A multi-center, prospective randomized controlled trial.

Introduction:Low-volume bowel preparation has been developed to increase patient compliance. We compared 1 L of polyethylene glycol/ascorbic acid (PEG/Asc) and oral sodium sulfate (OSS) with respect to bowel preparation efficacy, compliance, and safety.Methods:A multicenter, prospective, randomized, single-blinded, non-inferiority trial was conducted in 3 hospitals. Patients were randomized to receive a bowel-cleansing agent. Bowel-cleansing efficacy was evaluated using the Boston Bowel Preparation Scale (BBPS). Satisfaction, feeling, taste of the bowel cleanser, and adverse events after taking the bowel cleanser were investigated through a questionnaire. Additionally, blood samples were analyzed before and after bowel cleansing.Results:In total, 172 patients were analyzed (85 with 1 L PEG/Asc and 87 with OSS), and the mean BBPS scores were comparable between agents. The 1L PEG/Asc group tended to have a higher BBPS score in the right colon (2.22 vs 2.02; P = .08). The compliance of 1 L of PEG/Asc was comparable to that of OSS. Patients taking 1 L PEG/Asc reported greater thirst and dizziness (P = .04 and P = .047, respectively) than the OSS cohort. On the other hand, gastrointestinal symptoms such as vomiting and abdominal distension were more common in the OSS group, without statistical significance. In terms of laboratory adverse events, elevation of serum creatinine was found in both groups after taking the bowel cleansing agent (P < .001 for the 1L PEG/Asc group; P = .04 for the OSS group). However, most of the increased values were within the normal ranges.Discussion:The 1L PEG/Asc treatment was comparable to OSS in terms of bowel preparation efficacy, compliance, and safety.

Hierarchically structural layered double oxides with stretchable nanopores for highly effective removal of protein-bound uremic toxins

The global outbreak and prevalence of coronavirus disease 2019 (COVID-19) has triggered an urgent demand for family hemodialysis equipment. It is particularly vital to design and apply superior adsorbents to adsorb toxins for reducing the usage of dialysate. In this work, hierarchically structural MgAl layered double oxides (LDO) with stretchable nanopores were exploited through a facile one-pot trisodium citrate (TSC) assistant hydrothermal reaction followed by calcination treatment for effectively adsorbing protein-bound uremic toxins such as hippuric acid (HA) or indoxyl sulfate (IS). The optimized MgAl LDO possessed flower-like spherical morphology, ultrahigh specific surface area (187.3 m2/g) and uniquely stretchable nanopores, which were more conducive to incorporating anions due to their unique memory effect endowing them with promising adsorption capacities for HA or IS. And the adsorption data could be better conformed to pseudo-second-order kinetic model and Langmuir isotherm determining that the maximum adsorption capacity of HA and IS was 129.8 mg/g and 63.1 mg/g, respectively. Furthermore, the computation of molecular size paired with the analysis of adsorption mechanism accurately revealed that high-efficiency toxin capture was mainly attributed to electrostatic interaction for internal intercalation and surface adsorption. Therefore, the application of such delicate LDO as new premium adsorbent would facilitate the development and popularization of family hemodialysis equipment.

Obtaining of copper powder by method of a vortex electrolysis from acid sulphate electrolytes

• A vortex electrolysis unit was designed and assembled. • Finely dispersed copper powders were obtained by method of a vortex electrolysis. • Optimum conditions for obtaining finely dispersed copper powder were established. • The particle size of the powder is 5–10 μm, the current efficiency is 95.5%.

Treatment with Paracetamol Can Interfere with the Intradialytic Optical Estimation in Spent Dialysate of Uric Acid but Not of Indoxyl Sulfate.

Optical online methods are used to monitor the haemodialysis treatment efficiency of end stage kidney disease (ESKD) patients. The aim of this study was to analyse the effect of the administration of UV-absorbing drugs, such as paracetamol (Par), on the accuracy of optical monitoring the removal of uremic toxins uric acid (UA) and indoxyl sulfate (IS) during standard haemodialysis (HD) and haemodiafiltration (HDF) treatments. Nine patients received Par in daily dosages 1–4 g for 30 sessions. For 137 sessions, in 36 patients the total daily dosage of UV-absorbing drugs was less than 500 mg, and for 6 sessions 3 patients received additional UV-absorbing drugs. Par administration slightly affected the accuracy of optically assessed removal of UA expressed as bias between optically and laboratory-assessed reduction ratios (RR) during HD but not HDF employing UV absorbance of spent dialysate (p < 0.05) at 295 nm wavelength with the strongest correlation between the concentration of UA and absorbance. Corresponding removal of IS based on fluorescence at Ex280/Em400 nm during HD and HDF was not affected. Administration of UV-absorbing drugs may in some settings influence the accuracy of optical assessments in spent dialysate of the removal of uremic solutes during haemodialysis treatment of ESKD patients.

Systemic immunotherapy for the treatment of warts: Aliterature review.

Immunotherapy has emerged as a critical therapeutic tool for the treatment of warts. Immunotherapy for warts is currently restricted to recalcitrant lesions. A small number of regimens appear to be extremely effective. Furthermore, there is a scarcity of evidence-based research. Furthermore, in the majority of cases, their safety and effectiveness have not been evaluated in double-blind, controlled clinical trials, making the reproducibility of many of the listed treatments difficult to analyze and a possible placebo effect difficult to rule out. Analyzing and discussing different types of systemic immunotherapy. The different types of immunotherapy for warts are mentioned in this report. Systemic immunotherapeutic modalities commonly used in the treatment Echinacea, propolis, oral retinoids, glycyrrhizinic acid, levamisole, cimetidine, and zinc sulfate have all been reported as effective treatment modalities for different types of warts. Immunotherapy has emerged as one of the most important therapeutic modalities for warts. Such treatment is required not only for recalcitrant or multiple lesions, but also in the majority of treated cases.

EKSPLORASI DAN IDENTIFIKASI PURUN DANAU (Lepironia articulata) LOKAL SEBAGAI ADSORBEN ALAMI PADA IKLIM TROPIKA LEMBAB DI KALIMANTAN TIMUR

Purun is one of the endemic plants that naturally grows wild in peat and swamp areas. Purun is commonly found in peat and swamp areas in Indonesia, including in East Kalimantan, especially in Kabupaten Kutai Kertanegara. Purun belongs to the Cyperaceae family. This plant is a typical plant in swamp land. Swamp land is land for a long time during the year is always saturated with water or inundated. Purun is a plant that lives in the wild naturally in areas of peat swamp, tidal swamp and river areas that are acidic sulphate.There are three types of purun known in Kalimantan, namely purun danau, purun tikus and purun bajang. The purun danau (Lepironia articulata Retz. Domin.) has a fundamental difference when compared to the purun tikus and the purun bajang, which is much larger in size than the purun tikus and the purun bajang and has leaves that are tougher like woody and more clearly lined than other. Purun danau also has a cavity that is similar to a bamboo stick. The objectives of the study were to 1. determine the character of purun danau plants in the natural humid tropics habitat; and 2. Knowing the characteristics of purun danau plant habitat. The research design used in this research is descriptive or descriptive research. The results showed that: 1. the morphological character of the purun danau was in the form of a cylindrical stem like a pipe that grew elongated with a tapered tip, had thin partitions that filled the inside, the bulkhead was solid at the base and the stem was shiny green. The outer part of the base is white and covered with leaves shaped like a reddish brown sheath. The tapered end of the stem then grows into a compound flower which will contain many seeds in the generative phase. Purun danau flowers are compound flowers and are located at the end of the stem. The roots of purun danau are fibrous and grow with the stolons. 2. The purun danau habitat is characterized by the presence of water, either always stagnant or flowing water with varying heights (between 100 cm to 300 cm). In addition to the presence of water, purun habitat is also characterized by acidic soil pH conditions (4.10-5.20) and open land without shade. In addition to adapting well in acid sulphate soils, purun danau are also able to absorb heavy metal elements such as Pb, Cd and Zn.

Synthesis of phosphosulphate substance and properties of its structured mixture with quartz sand

Purpose. Creation of binder based on orthophosphoric acid and aluminum sulfate, study on its structure and physicochemical patterns of formation, determination of the properties of structured mixtures for the needs of foundry. Methodology. In the work, X-ray qualitative and quantitative analysis was performed on the Rigaku Ultima IV unit, and differential thermal analysis was performed on the STA 449 C Jupiter synchronous thermal analyzer. Orthophosphoric acid, technical thermal, of 85% concentration, 18-hydrous sulfate of aluminum Al2(SO4)3 18H2O and quartz sand of brand 3K5O3025 were used. The strength of core mixtures was determined on the US-700 unit on standard cylindrical samples with a diameter and height of 50mm. The roughness of the cast surfaces was determined on a profilometer model 107622 with computer processing of the obtained data and construction of profilograms. To determine the propensity of the core mixtures to form caking, a hexagon sample was used according to the method by M.Fedorov. Breakability was determined on standard cylindrical samples with a diameter and height of 50 mm according to the original method described in the text of the article. Findings. For the first time, the mechanism of formation of aluminum phosphates with binding properties during the interaction of aluminum hydrate crystal sulfate Al2(SO4)3 18H2O with orthophosphoric acid in the temperature range of 100200 has been investigated. The formation is proved of an intermediate phase during heating aluminum hydroxide Al(OH)3, which, in contrast to its sulfate, according to the results of thermodynamic analysis is able to interact with acid. Formation of aluminum in the system of ortho- and metaphosphates, which features binding properties and ensures high strength of samples based on quartz filler, has been established. The thermal transformations of the obtained binder, which consists of a combination of aluminum phosphates with its residual sulfate, are studied. Stages of gradual disintegration of crystal hydrates, formation of new aluminum phosphates and thermal decomposition of residual sulfate are recorded. The tendency to burn and knockout of the developed core mixtures was determined. Originality. For the first time, a description has been developed of the mechanism of formation of aluminum phosphates with binding properties during the interaction of its sulfate crystal hydrate Al2(SO4)3 18H2O with orthophosphoric acid in the temperature range of 100200. Practical value. A new inorganic binder from orthophosphoric acid and 18-aqueous aluminum sulfate has been obtained for foundry production. The scheme of its preparation involves preliminary mixing and heating of the specified reagents with the resulting formation of a dry powder material which consists of phosphates and residual aluminum sulfate, and therefore it is called phosphosulfate. The binding has a long shelf life and is introduced into the mixture in a ready-made form while the technology of its production is less energy-intensive and long-lasting compared to the preparation of traditional metal phosphate binding.