by Azra Shafi  and Qayyum Husain

Received: 06 August 2022;  Published: 17 November 2022;  doi: 10.21926/cr.2204040

Interpreting the relationship between the activity and structure of β-galactosidase is necessary to perceive the impact of the enzyme’s conformation on its catalysis. The current study thoroughly explains the effects of additives such as ethylenediaminetetraacetic acid (EDTA), sodium dodecyl sulfate (SDS), dithiothreitol (DTT), and urea on β-galactosidase activity and structure. β-Galactosidase activity was determined at various ionic strengths and temperatures as a function of time. Structural studies evaluating c [...]

by Amit Ahlawat  , Tarun Kumar Dhiman  , Pratima R. Solanki  and Pawan S. Rana

Received: 24 July 2022;  Published: 03 November 2022;  doi: 10.21926/cr.2204039

Organic compounds are one of the most severe pollutants occurring in the environment. Hence, it is important to remove these compounds from the environment through remediation processes such as photocatalysis. The present study investigated the photocatalytic degradation of p-nitrophenol (NP) and phenol red (PR) using a cerium oxide-titanium oxide nanocomposite (CeO2-TiO2nc) under UV light. CeO2-TiO2nc was synthesized using the co-precipitation method. An X-ray diffraction (XRD) analysis confirmed the phase purity [...]

by Mateus Carvalho  , Ana Paula Oliveira  , Francieli Mayer  , Cesário Virgens  and Maria do Carmo Rangel

Received: 31 August 2022;  Published: 02 November 2022;  doi: 10.21926/cr.2204038

Catalytic pyrolysis is an attractive alternative for converting biomass into energy and chemicals to replace fossil sources. This has encouraged the search for efficient catalysts that can directly remove oxygenated products during pyrolysis, since they are the main problem in the processing and use of the products obtained. The catalytic and non-catalytic pyrolysis of medium density fiber (MDF) over beta zeolite-supported nickel (3 and 5%) was performed using the biomass/catalyst of 1.0/0.2 ratio. The thermokineti [...]

by Elvira A. Guseinova  and Samira R. Safarova

Received: 28 July 2022;  Published: 26 October 2022;  doi: 10.21926/cr.2204037

In this study, we found that adding catalytic cracking feedstock, vacuum gas oil, and naphthenic acids in the amount of 0.005–0.0075% vol. increased the liquid target fractions, i.e., gasoline and light gas oil. The decrease in the yield of hydrocarbon gas at a practically constant degree of conversion of the raw material indicated a small proportion of the reactions of re-cracking of the resulting products. This also indicated the resource-saving nature of the process, allowing a larger amount of gasoline fraction [...]

by Simona Bassoli  , Anett Schallmey  , Julie Oble  , Giovanni Poli  and Alexandre Pradal

Received: 22 July 2022;  Published: 26 October 2022;  doi: 10.21926/cr.2204036

A two-step protocol for the synthesis of aryl-3-hydroxypropanones, which were regarded as lignin degradation products, was proposed herein. This protocol provided a more rapid and easier access to aryl-3-hydroxypropanones, and aryl-3-hydroxypropanones were expected to be ideal platform molecules for the synthesis of more complex value-added targets.

by Manal Al-Eid  , Lianhui Ding,  , Donya Sewdan  , Emad N. AL-Shafei  , Rasha Al-Ghamdi  , Abdulaziz Alqarawi  and Essa Al naimi

Received: 13 August 2022;  Published: 17 October 2022;  doi: 10.21926/cr.2204035

Parent ZSM-5 and Ga-modified ZSM-5 catalysts with different Si/Al ratios and particle sizes were prepared. The physicochemical properties of the prepared catalysts were investigated by performing X-ray powder diffraction analysis, BET surface area analysis, and NH3-TPD analysis. The performance of the aromatization reaction of the prepared catalysts was evaluated with 1-hexane as a model compound. The zeolite catalysts with a low SiO2/Al2O3 ratio possessed better activity than those with a high SiO2/Al2O3 ratio. Ga [...]

by Fabiano A.N. Fernandes

Received: 23 August 2022;  Published: 17 October 2022;  doi: 10.21926/cr.2204034

Biodiesel is derived from renewable vegetable or animal sources and is either used as a standalone fuel or blended with oil-based diesel. The kinetic mechanism of the esterification of oleic acid was investigated in a conventional batch reactor and a batch reactor coupled to a water adsorption system. The esterification was performed with oleic acid and methanol at different temperatures (70 to 110 °C) and alcohol-to-oleic acid molar ratios (3:1 to 9:1), using sulfuric acid as a catalyst. A kinetic model was constr [...]

by Binita Boro  , Shivam Porwal  , Dinesh Kumar  , Snehangshu Mishra  , Subrata Ghosh  , Sakshi Kansal  , Amreesh Chandra  and Trilok Singh

Received: 14 August 2022;  Published: 14 October 2022;  doi: 10.21926/cr.2204033

Solar cells based on organic-inorganic lead halide perovskites are popular in the photovoltaic community due to their high efficiency, low cost, and solution processability. Understanding the fundamentals of metal halide perovskite and its interfaces is extremely important for achieving high-quality materials and developing efficient devices using these materials with the necessary properties. Various methodologies have been used to evaluate the excellent optoelectronic properties, efficiency, and stability of PSCs [...]

by Anastasia Skonta  , Elena Gkantzou  , Konstantinos Spyrou  , Stamatia Spyrou  , Angeliki Polydera  , Dimitrios Gournis  and Haralambos Stamatis

Received: 31 July 2022;  Published: 08 October 2022;  doi: 10.21926/cr.2203032

3D printed PLA has already been demonstrated for several biotechnological applications, including enzymes immobilization. The prerequisites for an efficient screening assay include using small volumes of reagents, low cost, and rapid screening of large numbers of compounds and extracts. Hence, assays based on microtiter plates are predominant. Thus, designing and fabricating scaffolds on a similar scale, which could serve as immobilization carriers, and their recruitment in inhibitors screening studies is of great [...]

by Despina Vamvuka  and Christia Loulashi

Received: 24 May 2022;  Published: 29 September 2022;  doi: 10.21926/cr.2203031

The present study investigated the co-gasification of two different lignites blended with the forest residue collected from the land restoration activity sites of open-pit mines located in the region of the Ptolemais basin in North Greece performed under the carbon dioxide stream. All samples were devolatilized in a fixed bed unit prior to the gasification evaluations. The gasification evaluations were performed using a thermal analysis system (TG/DTG) operated at temperatures of up to 1000 °C. The reactivity, conv [...]