pH - Science topic

The bromfenac electrochemical determination over cobalt (III) oxyhydroxide-modified electrode has been described theoretically for the first time. Depending on the solution pH, the electroanalytical process will be carried out differently. It is hydrolyzed in a basic medium, correspondent to tears, thereby oxidized by electrochemical phenolization,...

Strain hardening is a type of rheological behaviour that can be observed in large deformation tests of various materials. In oscillatory shear rheometry, it is characterised by an increase in storage and loss modulus (G' and G'') with increasing oscillation amplitude (i.e, shear strain) until the material fractures and the moduli drop again. Acid-i...

本文旨在探讨土壤pH值变化对重金属形态分布的影响，通过理论分析与实验分析相结合，系统阐述土壤 pH值在调控重金属形态及其环境行为中的关键作用。研究发现，土壤pH值是影响重金属在土壤中赋存形态的重要因 素之一，直接关系到重金属的生物有效性和环境风险。本文还分析了土壤pH值变化对重金属吸附、沉淀、络合等过程 的影响机制，为土壤重金属污染修复提供了理论依据。

Resumo Introdução: O benefício dos esteroides pré-natais na maturação pulmonar fetal encontra-se bem estabelecido, mas seu efeito sobre os rins ainda não foi estudado detalhadamente em humanos. Modelos animais demonstraram um aumento na expressão de trocadores Na+/H+, bombas de Na+-K+-ATPase e aquaporina-1. O objetivo deste estudo é avaliar o efeit...

Resumo Opresente estudo buscou formular tintas artesanais para pinturas de murais cujos pigmentos sejam oriundos de plantas, considerando a necessidade de aditivos e técnicas capazes de garantir um bom desempenho para paredes internas de edificações. A falta de receitas e publicações sobre a proporção de cada componente para a obtenção de uma tinta...

La nota científica estudia el impacto a la calidad de los productos de origen animal como la carne, la leche, los huevos e implicaciones éticas las cuales esta conlleva. Centrada en analizar la relación entre el bienestar animal y las propiedades organolépticas de los productos, tales como el sabor y la textura y los valores nutricionales. Gracias...

Low-temperature plasma (LTP) is being advanced as an alternative radiation source that offers unique chemical properties demonstrated in a variety of reactive plasma species, in which electrons are the primary species derived upon plasma irradiation. We employed a simple and reliable protocol based on two-electron reduction of nitrate into nitrite...

Correction for ‘Multiple pH responsive zwitterionic micelles for stealth delivery of anticancer drugs’ by Jin Ma et al., RSC Adv., 2016, 6, 64778–64790, https://doi.org/10.1039/C6RA11645K.

Food waste cuttlebone has the potential as the raw material of carrier for enzyme immobilization. In this study, we presented a method for synthesizing CaCO3 nanoparticles coated chitosan (nano-CaCO3@chitosan) using cuttlebone as the raw material in the deep eutectic solvent of betaine and urea. The yield of nano-CaCO3@chitosan was 89.9%. The nano-...

The objective of this study is to evaluate the stability of Javanese long pepper extract nanoemulsions at different temperatures and with varying Virgin Coconut Oil (VCO) to Tween 80 ratios. The study was conducted by using the variation of VCO with Tween 80 (1:9; 1:18; and 1:27), then stored at 4°C, 25°C and 40°C and then stored for 6 weeks. Nanoe...

Doxycycline (DOXY), a widely used antibiotic during COVID-19, was overused, leading to concerns about contamination of aquatic environments and environmental problems. The present study used the Ti/TiO2-RuO2-IrO2 electrode for DOXY’s electrochemical oxidation (EO) in batch and once-through continuous mode operations. Process parameters were optimiz...

Bu çalışma, Kırıkkale’nin Delice ilçesine özgü yerel bir üzüm popülasyon olan “Delice Üzümü”nün morfolojik ve kimyasal özelliklerini detaylı bir şekilde incelemeyi amaçlamaktadır. Araştırma kapsamında, Delice Üzümü’nün salkım büyüklüğü, tane şekli, kabuk rengi ve kalınlığı gibi morfolojik özellikleri laboratuvar ve saha çalışmaları ile belirlenmişt...

As mãos são as partes do corpo mais expostas aos agentes agressivos tais como água, detergentes alcalinos e fatores climáticos como frio e o vento, podendo ocorrer o ressecamento, descamação, fissuras, inflamação e infecções. Com a finalidade de prevenir ou corrigir esses efeitos, formulam-se cosméticos baseados na manutenção da hidratação e na cob...

Las áreas degradadas necesitan técnicas relacionadas con la mejora en condiciones edáficas. Se evaluó el potencial que brindan las especies herbáceas y arbustivas para la implementación de técnicas de rehabilitación ecológica que permitan una mejora en el uso sostenible de los suelos. El lugar estudiado fue el sector este del Cerro Espíritu Santo,...

Although a variety of acid‐generating molecules have been developed, the formation of toxic byproducts and the need for light‐activation or temperatures that may be incompatible with physiological conditions leave room for the optimization of biocompatible acid‐generators. Herein, we report 4‐hydroxybenzyl chloride derivatives that generate hydroch...

To systematically investigate the durability performance of coal gangue pervious concrete (CGPC) under acid rain environment, various factors are taken into account, including designed porosity, acid rain pH value, and erosion time. These factors affect the mass, compressive strength, and permeability coefficient of CGPC. Moreover, the research del...

A two-step optimization strategy for the inductance control of through-silicon via (TSV)-based 3-dimensional (3-D) inductor is developed based on the stacked autoencoder model and multi-level particle swarm optimization algorithm. The design parameters are divided into two categories, including structural and geometrical parameters. The non-linear...

As características físico-químicas em frutos de morango são influenciadas por diversos fatores, entre eles, os genéticos e os sistemas de produção. Nesse sentido, o objetivo do trabalho foi quantificar as variáveis físico químicas e atividade antioxidante em 12 genótipos de morangueiro produzidos em sistema semi-hidropônico recirculante. Foram aval...

Biological activity is strongly dependent on pH, which fluctuates within a variety of neutral, alkaline, and acidic local environments. The heterogeneity of tissue and subcellular pH has driven the development of sensors with different pKa values, and a huge assortment of fluorescent sensors have been created to measure and visualize pH in living c...

Effects of pH, temperature and light on carbon metabolism in Macrocystis pyrifera gametophytes

El estudio comparó la eficiencia del carrizo (Phragmites australis) y el lirio acuático (Eichhornia crassipes) en la fitorremediación de aguas grises domésticas. El objetivo fue evaluar su capacidad para remover parámetros fisicoquímicos como el pH, conductividad eléctrica (CE) y sólidos suspendidos totales (SST). Asimismo, se aplicó un estudio de...

Malminkenttä is an old airfield covering an area of around 2.4 km2. Area is on soft subsoil which consists mainly of 5 to 20 m deep clay layers. The amount of required column stabilization is estimated to be about 10 million meters in total. The clay layer is a challenging task for deep mixing. The uppermost clay layer is sulphate clay where the pH...

Taylor Dispersion Analysis (TDA) is explored to measure the hydrodynamic sizes of full and half generation PAMAM dendrimers up to generation 4.5 in various buffer solutions. A method was used...

Air minum adalah air yang diolah dengan teknik pengolahan atau tanpa teknik pengolahan yang memenuhi syarat kesehatan serta dapat langsung diminum. DAM yaitu badan usaha yang mengelola air minum sebagai keperluan masyarakat dalam bentuk curah, serta dikemas dalam kemasan botol sebanyak 19 liter, Kurangnya pengawasan serta pengetahuan penjamah terha...

The adsorption capacity of four different biochar adsorbents prepared from corn cobs and cassava peels at 350 and 450℃ for the removal of cadmium and lead ions from their aqueous solutions were investigated. The biochars were characterized in terms of physico-chemical properties, functional groups, surface characteristics and thermal behaviour. The...

Acidithiobacillus ferrooxidans is a Gram-negative bacterium that thrives in extreme acidic conditions. It has emerged as a key player in biomining and bioleaching technologies thanks to its unique ability to mobilize a wide spectrum of elements, such as Li, P, V, Cr, Fe, Ni, Cu, Zn, Ga, As, Mo, W, Pb, U, and its role in ferrous iron oxidation and r...

Las aguas residuales provenientes del proceso de beneficio húmedo de café son potencialmente dañinas debido a su pH ácido y su carga orgánica presente debido al excesivo uso que se le en las fases de despulpado y lavado. Se analizó el tanque de neutralización que se encuentra dentro de la planta de tratamiento de aguas residuales del beneficio húme...

This study examined the distributions of radon and its parent radionuclides ²²⁶ Ra and ²³⁸ U in groundwater samples from the Singhbhum region, Jharkhand, India. Radon showed a heterogeneous spatial distribution pattern, with a lognormal distribution. A good correlation between radon bubbler-Lucas cells and liquid scintillation counting techniques w...

This review paper analyzes the correlation between electrical conductivity (EC) and total dissolved solids (TDS) in water and summarizes current research on this topic. EC and TDS are important parameters used to evaluate water quality, as they provide information on the concentration of dissolved ions, minerals, salts, and organic matter in water....

In this work, Europium-metal organic framework (Eu-MOF) was successfully fabricated via an efficient and rapid ultrasound-assisted reverse micelle method. The as-synthesized Eu-MOF served as a fluorescence sensor to detection of caffeine via a fluorescent quenching mechanism. The effect of detection parameters including pH, incubation time, and tem...

This study investigated the factors affecting bacterial diversity in purplish and calcareous soils under the same vegetation type. The results showed that obvious differences in pH, water content, total phosphorus (TP), free iron oxide (Fed) and amorphous iron oxide (Feox) existed between the two soils. The bacterial Shannon indexes of the two soil...

The objective of this study was to determine the combined effects of different freezing and thawing rates on the quality characteristics of aged lamb loins. A total of 105 lamb loins at 1 d postmortem were vacuum-packaged and aged for 2w kat −1.5°C. The loin samples were randomly assigned to 7 treatments, comprising 2 freezing (fast and slow) and 3...

The current study deals with composition, density and diversity of phytoplankton during January 2023 to December 2023 monthly in the Rathi cheruvu, Bhadradri Kothagudem, Telangana, India. Samplings were collected from different locations of the study site during a one year research period. Several physico-chemical parameters were studied from two s...

Esta pesquisa teve por objetivo elaborar hambúrgueres adicionados de extratos de própolis, como aditivo natural e revestido com solução filmogênica a base de extratos de própolis. No produto final cru foram realizadas análises físico-químicas de pH, acidez titulável, teor de umidade, teor de cinzas, teor de proteínas, atividade de água, índice de T...

In Armenia, the species Sambucus nigra L. is found in the undergrowth of the lower and middle forest belts of the northern (Lori, Tavush) and southern regions (Zangezur). Black elderberry is almost never used in Armenian folk medicine. In Armenia, research into obtaining beverages from the generative organs of the black elderberry plant is at an ea...

Chemical fertilizers pose a threat to the sustainability of agriculture in terms of social, economic, and environmental aspects. Organic fertilizers offer a promising solution to overcome these issues. Therefore, this experiment was conducted to compare the effectiveness of the use of organic fertilizer solutions compared to the prevailing fertiliz...

Over the past years, enzymatic depolymerization of PET, one of the most widely used plastics worldwide, has become very efficient leading to the end products terephthalic acid (TPA) and ethylene glycol (EG) used for PET re‐synthesis. Potent alternatives to these monomers are the intermediates BHET and MHET, the mono‐ and di‐esters of TPA and EG whi...

Budidaya ikan merupakan komoditi yang bagus untuk menunjang perekomonian masyarakat Indonesia dan memiliki memiliki prospek yang cukup tinggi. Salah satu permasalahan yang utama di kolam ikan adalah kualitas air kolam, Ada beberapa faktor yang mempengaruhi yaitu suhu, pH, dan kejernihan air kolam, pengolahan kualitas air kolam yang baik dapat menja...

Забруднення поверхневих та підземних вод важкими металами становить серйозну загрозу для екологічної безпеки та здоров’я живих організмів. Саме тому, актуальним завданням є розробка нових і вдосконалення існуючих технологій для очищення водних об’єктів від токсикантів різної природи. Одним з факторів, що впливає на вибір методу очищення є концентра...

Behaviour is a fundamental parameter for understanding the animal fitness, serving as an indicator of exposure to stressors. In ecosystems, animals often face multiple stressors simultaneously. Their behavioural responses may vary when exposed to individual stressors, whilst synergistic, additive, or antagonistic effects can result from the interac...

Esta bibliometría tiene como objetivo realizar un estudio exhaustivo del contexto de investigación sobre las antocianinas que forman parte de las flores, analizando su química, las fuentes, avances en la investigación en diferentes áreas del conocimiento. A partir de una base de datos de 372 artículos procesados tanto por Bibliometrix R packge y la...

Correction for ‘Controllable biomolecule release from self-assembled organic nanotubes with asymmetric surfaces: pH and temperature dependence’ by Naohiro Kameta et al. , Soft Matter , 2008, 4 , 1681–1687, https://doi.org/10.1039/B803742F.

Due to the restrictions of strong acids in some regions, the reuse process of rare earth (RE) precipitation mother liquor is difficult to carry out. To achieve the straightforward and efficient reuse of precipitation mother liquor in such areas, the potential for directly reusing this liquor for rare earth (RE) leaching was explored. The results sh...

Here, we describe (1) the AlphaFold-based structural modeling approach to identify amino acids of the photoprotein berovin that are crucial for coelenterazine binding, and (2) the production and characterization of berovin mutants with substitutions of the identified residues regarding their effects on the ability to form an active photoprotein und...

An assay is described that permits the study of the kinetics of DNA cross-link precursor formation, the kinetics of cross-formation, and the kinetics of the repair of these DNA cross-link precursor lesions, at physiological pH values. Due to the relatively rapid nature of these processes existing assays are not suited to the study of these processe...

تعتبر طريقة إزالة النترات من الماء باستخدام المعادن صفرية التكافؤ من الطرائق التي تثبت فعاليتها العالية يوماً بعد يوم، وخاصةً الحديد صفري التكافؤ. إلا أن أبرز العوائق التي تشكل عقبةً أمام الاستمرار باستخدامه هي تعرض سطحه للتخميل أثناء التفاعل، وتشكل أيونات الأمونيوم كمنتج رئيسي لاختزال النترات تحت ظروف المعالجة. تم في هذا البحث دراسة تأثير الغضار أ...

Sonohemical method for the degradation of toxic dyestuffs is now considered as a promising technique. An important dye namely Methylene Blue (MB) was degraded using ultrasound irradiation at different pH. The impact of various additives like CCl4, H2O2, NaCl and Na2SO4 with Original Research Article Islam et al.; Chem. Sci. Int. 81 different doses...

Knowing the exact location of the semiconductor band‐edges is key for mechanistic insights into their use for water and CO2 photo/electrocatalysis. In this regard, a reliable strategy for nano‐semiconductors did not exist yet. We demonstrate the use of reversible redox probes on nano‐semiconductor electrodes to determine their band‐edge locations i...

The main influencing factors of water environment and the spatiotemporal differences of eutrophication were identified in the Dianchi Lake, the results indicated a comparatively poor and fluctuating the water environmental condition in the Caohai compared to the Waihai, and differences in the correlation between water environment indicators were ob...

Bisphenol A (BPA) has been extensively used in the commercial production, especially the production of plastic products. It has endocrine-disrupting effects and poses potential risks to health, which is also related to the development of various diseases. Nevertheless, using conventional biological treatment techniques has proved challenging in ful...

In the first article, entitled “Hydrochemical stratigraphic analysis of the filling of the Meirama open pit mine I: Monitoring and filling” (Juncosa et al. Environ Sci Pollut Res 20(11):7520–7533, 2013), the filling process of the old Meirama mining pit (NW Spain), as well as the methodology used in the sample collection and analysis, was described...

The paper presents a model of physico-chemical processes in aquatic ecosystems, utilizing mass balance equations for multicomponent two-phase systems. This model aims to provide a comprehensive understanding of the interactions and dynamics within aquatic environments. It presents original mass balance equations within the residual concentration me...

End-to-end linked nanorod dimer nanogap antennas exhibit superior plasmonic enhancement compared to monomers due to the coupling of localized surface plasmon resonances (LSPR) of individual nanorods. However, controlling the assembly...

The reduction of dibromodicyanoaurate(III) ion by octacyanotungstate(IV) ions was studied under near stoichiometric conditions in an acidic medium. An order change occurred during the course of the reaction. The reaction was first order in Au(CN) 2 (Br) 2 – and second order in W(CN) 8 4– for the first half-life, but after ca. 60% conversion became...

This study aims to characterize the physico-chemical properties of surface water, groundwater and soils in the Bounamoussa watershed, located in northeastern Algeria. Samples were taken at various stations and analyzed for various physico-chemical parameters. Results show that surface waters are generally alkaline with moderate electrical conductiv...

El objetivo de este trabajo es optimizar el pH del concentrado de horchata a base de semillas de melón, utilizando el modelo de experimentación Taguchi. Este factor es crucial para garantizar tanto la calidad del producto final como su estabilidad microbiológica. La metodología se basa en la realización de experimentos controlados donde se varía el...

An accurate deep learning predictor of enzyme optimal pH is essential to quantitatively describe how pH influences the enzyme catalytic activity. Seq2pHopt-2.0, developed in this study, outperformed existing predictors of enzyme optimal pH (RMSE=0.833 and R2=0.479), and could provide good interpretability with informative residue attention weights....

Climate change poses risks to bivalves; thus, searching for resilient alternative species is crucial for sustainable fisheries. This study examines the impact of reduced pH and elevated temperature and their combined effects on the queen scallop Aequipecten opercularis in captivity. The results indicated that a low pH reduced its growth rates in bo...

Nowadays, there is a trend to enhance the properties of meat products by fortifying them with various plant-based extracts. The objective of the work was to fortify pork burgers with different concentrations of Prunus serotina extract (PSE) and to evaluate certain quality attributes (pH, cooking characteristics, color parameters, and sensory attrib...

The development of new catalytic materials for the fast and efficient photocatalytic reduction of toxic Cr(VI) to less toxic Cr(III) across a wide pH range of water environment has become one of the most challenging topics. Herein, two new isopolymolybdate‐based Ni(II)‐complexes [NiII(bcbpy)2(β‐Mo8O26)0.5 (H2O)] ⋅ 4H2O (BHU‐5) and [NiII(bcbpy)2[θ‐M...

A published analysis of ocean acidification thresholds for decapod crustaceans highlights data showing the negative effects of low pH on many species. However, the methods used in the paper have substantial flaws that call into question the proposed thresholds. The quantitative metrics calculated for the meta-analysis are uninformative with respect...