Article
Chemistry, Physical
Shawn L. Riechers, Xin Zhang, Jay A. LaVerne, Kevin M. Rosso
Summary: This study investigated the dissolution of gibbsite platelets in NaOH solutions using atomic force microscopy with an integrated X-ray source. The results showed that dissolution rates and particle roughness were significantly enhanced when irradiation was carried out during dissolution, and to a lesser extent when irradiated dry prior to dissolution.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Inorganic & Nuclear
Hailin Zhang, Xin Zhang, Trent R. Graham, Carolyn Pearce, Hanna Hlushko, Jay A. LaVerne, Lili Liu, Suyun Wang, Shili Zheng, Yi Zhang, Sue B. Clark, Ping Li, Zheming Wang, Kevin M. Rosso
Summary: The study investigated the effects of sodium hydroxide concentrations, reaction temperatures, and aluminum concentrations on the crystallization and transformation of aluminum (oxy)hydroxides, revealing a dependency on reaction conditions. Specific Al/OH- ratios favored the formation of high-crystallinity precipitates, while the transformation of gibbsite to boehmite was observed in acidic and weak caustic environments at temperatures above 80 degrees C. The findings provide a solid foundation for selecting different solid phases by adjusting reaction conditions.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Trent R. Graham, Jian Zhi Hu, Nicholas R. Jaegers, Xin Zhang, Carolyn Pearce, Kevin M. Rosso
Summary: This study investigates the solid-liquid transformations of aluminum (Al) in the Na2O : Al2O3 : H2O system and identifies a novel metastable aluminate species. The experimental results show that Al undergoes a transition from octahedral coordination to tetrahedral coordination, and it crystallizes into the monomeric octahedral aluminate structure through the formation of an amorphous tetrahedrally coordinated sodium aluminate hydrate phase.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Energy & Fuels
Syed Rizwanullah Hussaini, Jack Dvorkin
Summary: By computing total porosity and specific surface area for various natural sandstone, carbonate, and granular samples, tight correlations between these two variables were observed. Different trends were identified for low-to-medium porosity rocks compared to high-porosity granular samples, which were explained through theoretical derivations based on solid inclusions and grain packs. The accuracy of the digital data matching the theoretical curves indicates that the trends observed at a microscopic level are applicable at a much larger core and reservoir scale.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Construction & Building Technology
Jiandong Huang, Yi Zhang, Yuantian Sun, Jiaolong Ren, Zedong Zhao, Junfei Zhang
Summary: This study investigated the pore size distributions and permeability reduction behavior of pervious concrete through laboratory tests. The results showed that while thickness has a negligible effect on permeability, it has a significant impact on clogging behavior.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Quanzhou Du, Yuhua Zhao, Kelei Zhuo, Yujuan Chen, Lifang Yang, Chunfeng Wang, Jianji Wang
Summary: This study presents a pre-assembly strategy to prepare three-dimensional hierarchical porous carbons as electrode materials for supercapacitors, aiming to investigate the effects of pore volume, pore size, and ratio of mesopores to micropores on the performance of ionic liquid-based supercapacitors. The prepared HPCs exhibit excellent specific capacity and energy density, making them promising materials for high-performance supercapacitors.
Article
Engineering, Environmental
Qingyu Xie, Qiangbing Huang, Yue Liu, Zhuangzhuang Wang, Daijin Yu, Jianbing Peng
Summary: Understanding the impact of rainfall leaching is critical for evaluating loess slope stability. This study analyzed the effect of rainfall leaching on the shear behavior and microstructure of undisturbed loess. The results showed that the shear failure mode of loess depended on the confining pressure and rainfall leaching amount. Rainfall leaching significantly decreased cohesion and slightly decreased internal friction angle. It also caused pore collapse and a decrease in total porosity due to the softening, movement, and disintegration of cemented material between particles.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Article
Engineering, Chemical
Bhaumik Sutariya, Santanu Karan
Summary: This article discusses the importance of high flux nanofiltration (NF) membranes and mathematical models for pore size estimation. It provides a detailed discussion on the probability density function (PDF) model and addresses its flaws and the need for standardization.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Sebastian T. Mergelsberg, Mateusz Dembowski, Mark E. Bowden, Trent R. Graham, Micah Prange, Hsiu-Wen Wang, Xin Zhang, Odeta Qafoku, Kevin M. Rosso, Carolyn I. Pearce
Summary: Gibbsite is a common mineral phase with many industrial applications, serving as the solubility limiting phase for aluminum over a wide pH range. By examining defects in gibbsite nanoplates and recrystallizing them in highly alkaline solutions, it has been shown that the crystallinity can be gradually improved and most defects eliminated, highlighting a possible cluster-mediated growth mechanism.
Article
Engineering, Environmental
Chaolin Wang, Kunpeng Zhang, Yu Zhao, Jing Bi, Lin Ning, Kun Zhang
Summary: This study proposes an extended simplified local density adsorption (SLD) model and combines it with nuclear magnetic resonance (NMR) tests to predict the adsorption amount and pore size distribution of coal samples. The results are beneficial for the prediction and calculation of coal adsorption amount and pore size distribution.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
Vi T. Nguyen, Ngoc H. Pham, Dimitrios V. Papavassiliou
Summary: This study examined the relationship between velocity magnitude distribution and pore size distribution in different porous media. The results showed that both velocity magnitude and pore size followed the same distribution pattern. This finding has implications for predicting velocity distribution in porous media and controlling velocity by manipulating pore structure.
Article
Thermodynamics
Roksana Muzyka, Edyta Misztal, Joanna Hrabak, Scott W. Banks, Marcin Sajdak
Summary: This study aimed to determine the relationships among temperature, material grain size, heating rate, and retention time, as well as the effects of these variables on the surface morphology of wheat straw biochar. The study found that a high surface area of 400 m2/g and an average pore size of approximately 2.34 nm could be obtained at a temperature of 700 degrees C, a grain size of 0.5-1.0 mm, a heating rate of 20 degrees C/min, and a residence time of 5 min.
Article
Chemistry, Multidisciplinary
Sahar Seifi, Daniel Levacher, Andry Razakamanantsoa, Nassim Sebaibi
Summary: The evolution of the microstructure of dry-mortar mixtures containing wastepaper sludge ash and ground granulated blast-furnace slag as binders was investigated. The study found that water quantity, compaction level, and activators have a significant influence on the microstructure of these mortars. Different activators showed differences in specific surface area, adsorption property, and pore distribution. The microstructure of the activated mortars was analyzed in terms of water/binder ratios, mechanical strength, and type/dosage of activator used.
APPLIED SCIENCES-BASEL
(2023)
Article
Forestry
Dessie T. Tibebu, Stavros Avramidis
Summary: Understanding the fractal dimension of wood pores is essential for studying its macroscopic properties. This research used the pore size distribution to explore the fractal dimension of softwoods and hardwoods. The results revealed significant differences in pore size distribution and fractal dimension values for different pore sizes.
Article
Engineering, Environmental
Przemyslaw Maziarka, Christian Wurzer, Pablo J. Arauzo, Alba Dieguez-Alonso, Ondrej Masek, Frederik Ronsse
Summary: Biochar has a large specific surface area, making it suitable for applications in agriculture and environmental management. N-2 and CO2 characterization were used to evaluate the structural properties of different biochars, revealing that the peak in surface area reported around 650 degrees Celsius may be an artifact of N-2 measurements. The structural rigidity of biochar influences N-2 measurements, suggesting the use of a pore specific calculation model.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Agriculture, Dairy & Animal Science
Rakesh Kumar, Ishwar Dayal Gupta, Archana Verma, Sohanvir Singh, Ragini Kumari, Nishant Verma
Summary: This study identified genetic variations of the HSPB6 gene in Karan Fries cattle and found associations between certain SNPs and heat tolerance traits, suggesting potential use of these SNPs as markers for genetic selection in breeding programs.
ANIMAL BIOTECHNOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Pratika Singh, Azmi Khan, Rakesh Kumar, Krishna Kumar Ojha, Vijay Kumar Singh, Amrita Srivastava
Summary: Iron is an important micronutrient for plant growth and development. In this study, the researchers evaluated the binding of different iron carriers with rice transporters and found that the xenosiderophore bacillibactin has a stronger binding with the transporters compared to the endogenous iron carrier DMA. This study suggests the potential application of xenosiderophores in promoting iron uptake and distribution in rice.
JOURNAL OF BIOMOLECULAR STRUCTURE & DYNAMICS
(2023)
Article
Food Science & Technology
Yue Yuan, Xin Geng, Hua Wu, Rakesh Kumar, Juan Wang, Junsong Xiao, Huafeng Tian
Summary: The chemical composition and antibacterial activities of five tea tree essential oils were analyzed. The oil of Melaleuca leucadendron Linn. showed the best antimicrobial effects. Coacervation between gelatin and gum Arabic was investigated, and microcapsules with smaller particle size and greater encapsulation efficiency were obtained through microfluidization.
JOURNAL OF FOOD PROCESSING AND PRESERVATION
(2022)
Article
Pharmacology & Pharmacy
Arti Kumari, Rakesh Kumar, Gira Sulabh, Pratishtha Singh, Jainendra Kumar, Vijay Kumar Singh, Krishna Kumar Ojha
Summary: This study aims to find a natural and safe alternative molecule as a tyrosinase inhibitor, and evaluates the efficacy of glabridin and its derivatives through modeling, cell experiments, and ADME analysis. Some derivatives show better binding affinity than glabridin, and glabridin effectively inhibits melanin production. Molecular properties and bioactivity analysis suggest these molecules as potential drug candidates.
ADVANCES IN TRADITIONAL MEDICINE
(2023)
Article
Horticulture
Rohan Kumar Raman, Dhiraj Kumar Singh, Sudip Sarkar, Jaspreet Singh, Abhay Kumar, Ujjwal Kumar, Rakesh Kumar, Akram Ahmed, Anirban Mukharjee, Surajit Mondal, Ashutosh Upadhyaya, P. S. Brahmanand
Summary: This study analyzed the production trends of major fruit crops in Bihar and found a significant increasing trend in banana production. Zone I and IIIB in Bihar produced significantly more fruit than other zones. The study results can help researchers and policy makers identify low productivity areas and improve productivity to support sustainable income for farmers in flood-prone areas.
Article
Engineering, Electrical & Electronic
Atish Kumar Sharma, Nitesh K. Chourasia, Prakash Kumar Jha, Rakesh Kumar, Manish Kumar, Ritesh Kumar Chourasia
Summary: Organic solar cells are gaining research interest due to their lower pollution compared to traditional solar cells. In this study, the parameters of the PTB7:PC71BM active layer were optimized, and graphene oxide and PFN:Br were used as the hole and electron transport layers respectively. The highest power conversion efficiency of 15.31% was achieved at an active layer electron affinity of 3.9eV. The effects of electron and hole mobility, as well as series and shunt resistance, were analyzed.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Mathematics, Applied
Rupali Kaushal, Garima Gupta, Rashmi Sachdeva, Rakesh Kumar
Summary: This paper studies conformal slant Riemannian maps and umbilical conformal slant Riemannian maps from nearly Kaehler manifolds to Riemannian manifolds, and derives necessary and sufficient conditions for such maps to be harmonic. Later, it studies conformal slant Riemannian maps with totally umbilical fibers. Finally, it presents some non-trivial examples of conformal slant Riemannian maps from non-Kaehlerian nearly Kaehler manifold S6 to Riemannian manifolds.
MEDITERRANEAN JOURNAL OF MATHEMATICS
(2023)
Article
Biochemistry & Molecular Biology
Azmi Khan, Ashutosh Singh, Pratika Singh, Rakesh Kumar, Krishna Kumar Ojha, Vijay Kumar Singh, Amrita Srivastava
Summary: Microorganisms produce siderophores to acquire iron, while the mammalian immune system produces lipocalins to sequester these siderophores from invading bacterial pathogens. Lipocalins can also transport siderophore-bound iron to host cells. However, the binding of fungal siderophores with human lipocalins is still not fully understood. This study investigates the expression of human lipocalin and its binding with fungal siderophore, as well as the potential mechanism of siderophore-mediated cell death in hepatocellular carcinoma.
JOURNAL OF BIOMOLECULAR STRUCTURE & DYNAMICS
(2023)
Article
Engineering, Electrical & Electronic
Prakash Kumar Jha, Nitesh K. K. Chourasia, Ankita Srivastava, Atish Kumar Sharma, Rakesh Kumar, Subhash Sharma, Manish Kumar, Ritesh Kumar Chourasia
Summary: This research proposes a lead-free hybrid solar cell with CH3NH3SnI3 as the absorber layer, Cu2O as the hole transport layer, TiO2 as the electron transport layer, and FTO as the transparent conducting oxide layer. Simulation studies show that a temperature of 305 K and a Gaussian peak defect density of 1.079 x 10(16) cm(-3) in the absorber layer can achieve the best performance. The results suggest that this analysis may open up new possibilities for clean energy.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Optics
Rakesh Ranjan Kumar, Lars Nielsen, Nicolas Volet, Martijn J. R. Heck
Summary: We present a study on the intra-cavity coherent combining of two DBR lasers on an InP platform, achieving a combining efficiency of 84%. The combined DBR lasers exhibit an on-chip power of 9.5 mW at an injection current of 42 mA in both gain sections simultaneously. This monolithic approach enables the operation of compact and high-power lasers in a single-mode regime with a side-mode suppression ratio of 38 dB, providing a promising direction for integrated photonic technologies.
Article
Agronomy
Swati Walia, Pawan Kumar, Dinesh Kumar, Rakesh Kumar
Summary: This study investigates the growth characteristics and ginsenoside content in the roots of Panax ginseng cultivated in Lahaul & Spiti, Himachal Pradesh, India. The results show that plant growth parameters increase with crop age and reach maximum maturity at five years, along with increased production of seeds and roots. The HPLC analysis reveals 14 compounds representing a total ginsenoside content of 31.81 +/- 2.89 mg/g, with Rb1, Rg2, and Re identified as major ginsenosides. The soil and climate of the Lahaul and Spiti district in Himachal Pradesh are found to be suitable for cultivating P. ginseng with high ginsenoside content in five-year-old roots.
PLANT SOIL AND ENVIRONMENT
(2023)
Editorial Material
Radiology, Nuclear Medicine & Medical Imaging
Kunal Ramesh Chandekar, Swayamjeet Satapathy, Sridhar Panaiyadiyan, Rakesh Kumar
Summary: PSMA PET/CT is increasingly used for evaluating prostate cancer. We present a case of a 50-year-old man with high-risk PCa, in which Ga-68-PSMA-11 PET/CT identified multiple active perirenal fascia metastases, in addition to prostatic primary, nodal, and skeletal metastases. This case highlights the uncommon metastatic site of perirenal fascia in PCa.
NUCLEAR MEDICINE AND MOLECULAR IMAGING
(2023)
Article
Thermodynamics
Rakesh Kumar, Thomas C. Alex
Summary: This paper focuses on the carbothermic reduction of red mud in the presence of sodium carbonate. The research investigates the phase equilibrium, thermal analysis, and roasting and leaching processes of red mud-soda-carbon pellets. The study reveals the interdependence of the decomposition of sodium carbonate, metallisation of red mud, sodium aluminate formation, and alumina recovery.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Metallurgy & Metallurgical Engineering
Rakesh Kumar
Summary: This paper focuses on the mechanical activation of aluminosilicate wastes, specifically ground-granulated blast furnace slag (GGBFS) and fly ash (FA), which is relevant to the development of improved blended cements and geopolymers. The presence of amorphous phases in these materials poses challenges for characterization. The paper reviews interesting findings regarding the role of milling devices, characterization challenges, and the manifestation of mechanically induced reactivity, with emphasis on the relative importance of mechanical activation compared to reaction temperature.
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
(2023)
Article
Physics, Nuclear
A. Mukherjee, S. Bhattacharya, T. Trivedi, R. P. Singh, S. Muralithar, D. Negi, R. Palit, S. Nag, S. Rajbanshi, M. Kumar Raju, S. Kumar, D. Choudhury, R. Kumar, R. K. Bhowmik, S. C. Pancholi, A. K. Jain
Summary: In this study, excited states in the Se-72 nucleus were investigated using experimental observation and theoretical calculations. New gamma-ray transitions were identified, and enhanced interconnecting transitions between positive- and negative-parity bands were found, suggesting the existence of octupole correlations in this nucleus.
