bluuebunny/crossref_metadata_2025_split huggingface dataset:
Novel Mathematical Models for Prediction of Spent Engine oil Interactions with Vernonia amygdalina Leaf Extract
Authors: Ntesat Unyeawaji Brownson , Achinike Okogbule-Wonodi , Emeka Chinwendu , Zacchaeus Mgbowaji 
Published: May 2024

Aims: The michaelis-menten biokinetic model was used for the determination of key biokinetic parameters; maximum specific rate constant ( and michaelis-menten constant ( including the total polycyclic aromatic hydrocarbon (TPAH) degradation rate equation in the biostimulation of spent engine oil (SEO) – contaminated soil using vernonia amygdalina leaf (bitter leaf) extract.
Study Design: Single factor experiment in a randomized complete block design (RCBD) was used in this study.
Place and Duration of Study: Research farm, Rivers state university, Port-Harcourt, Nigeria, between April 2023 and May 2023.
Methodology: TPAH was quantified by the standard method, according to USEPA method using gas chromatography-mass spectrometry (GC-MS). The experiment consisted of 4 reactors replicated thrice including the control (Labelled A to D) comprised of soil, SEO and bitter leaf extract in the ratios of 8:1:0.5, 8:1:1, 8:1:1.5, and 8:1:0, respectively, after 8 weeks of treatment.
Results: The results obtained shows that TPAH concentration dropped by 42.3 – 63.9% from 98.73mg/kg-1 with an average reduction of 52% was achieved in all treatment reactors. The average of was 4.4mg/kg-week and was 79.2mg/kg while the TPAH degradation was deduced as at any TPAH concentration. The validation of the developed model indicates a high coefficient of determination (2) ranging from 0.927 to 0.992 and a low root mean square error of 9.08 to 20.81mg/kg. This statistical tool effectively shows the potential of the model to predict TPAH concentration in the biostimulation of spent engine oil-polluted soil using bitter leaf extract
Conclusion: Up to 63.9% TPAH reduction was achieved for the stated period. The evaluation results show the potential of the model to predict TPAH in the biostimulation of SEO–contaminated sandy loam soil using bitter leaf extract.
Synthesis and Crystal Structure Studies of a New Complex of Co (III)-Schiff Base Derivative Derived from Isonicotinohydrazide
Authors: Diop Babacar , Seck Thierno Moussa , Ndoye Cheikh , Thiam Ibrahima El-hadji , Diouf Ousmane , Tamboura Farba Bouyagui , Retailleau Pascal , Gaye Mohamed 
Published: May 2024

A new Co(III) complex prepared by the reaction of N'–(1–(pyridin–2 yl)ethylidene) isonicotinohydrazide (H2L) with Co(II) ion is reported in this paper. The H2L ligand is structurally characterized by elemental analysis, NMR, and infrared spectroscopies. The mononuclear complex [Co(HL)2]·Cl·3H2O (1), is characterized by infrared spectroscopy, elemental analysis, conductance, magnetic room temperature measurement and single X-ray diffraction. The complex crystallizes in the monoclinic system with space group P21/c. The parameters of the unit cell are a = 9.6818(3) Å; b = 25.1587(6) Å; c = 11.5481(3) Å; β = 101.797(3) °; Z = 4; Rint = 0.0313 and wR(F2) = 0.0812. The asymmetric unit of the compound contains a discrete [Co(HL)2]+ cation one free chloride anion and three uncoordinated water molecules. In the discrete cation one Co3+ ion two organic ligand molecules are present. The coordination polyhedron around the Co3+ center is best described as a distorted octahedral with CoN4O2 chromophore. The crystal structure of the complex is stabilized by intramolecular and intermolecular hydrogen bonds.
Assessment of Soil Erosion within the Gayathripuzha River Basin Using RUSLE Model and GIS Tools
Authors: Bai E.B. Gilsha , Raju Ardra , Rema K.P. , Sumiya K V , Varughese Anu , Resmi J 
Published: May 2024

Soil erosion, a natural phenomenon accelerated by human activities, became a major problem for agricultural land use and for water quality concerns. Soil erosion by water is influenced by various factors like climate, nature of land surface, slope steepness, soil properties, land cover, and management practices. Estimation of soil erosion is essential to know the nature and quantity of soil loss and create specific strategies for soil conservation. This research paper thoroughly examines the susceptibility of soil erosion in the Gayathripuzha river basin in Kerala, India, which is encompassing a wide area of around 961 km². Employing the Revised Universal Soil Loss Equation (RUSLE), this investigation assesses the influential factors affecting soil erosion, which comprise rainfall (R Factor), soil erodibility (K Factor), topography (LS Factor), land usage (C Factor), and the impact of conservation measures (P Factor). The study was conducted using Geographic Information System (GIS) tools like ArcGIS 10.8 Desktop and integrating data on rainfall, soil properties, land topographic features, and land use. Rainfall erosivity is a major factor causing erosion in Gayathripuzha river basin and it ranges from 746.03 to 1222.35 MJ mm ha−1 h−1 y−1 in the river basin. Soil erodibility factor also varies widely within the region. Slope length and steepness factor showed that highland ecosystems are present only in a small area of the river basin. Variation in land use and land cover also influenced the soil erosion within the area. The estimated average annual soil erosion ranges from 0 to 133.18 t ha-1 yr-1 within the research site. The research found that soil erosion varied greatly across the study area. Regions with slopes over 50% had much higher erosion rates, while most of the study area had low erosion levels. Notably, the intensity of soil erosion demonstrated a positive correlation with slope percentage, with areas classified as bare ground demonstrating the highest erosion rates. These findings emphasize the necessity for targeted and comprehensive conservation strategies tailored to the diverse landscape of the region to effectively manage soil erosion and mitigate its adverse impacts.
Numerical study of solid–liquid fluidization dynamics
Authors: Gevrin Frédéric , Masbernat Olivier , Simonin Olivier 
Published: March 2010

AbstractA numerical model based on the kinetic theory of granular media has been tested to simulate the unsteady two‐phase flow in solid–liquid fluidized beds. We focus here on the local unsteady flow features as predicted by the model and comparison with experimental data of Zenit and Hunt (2000) are discussed. In most of the cases, a series of two‐dimensional rotational structures develops along the bed height, which controls the instantaneous solid fraction field as well as the level of fluctuating kinetic energy of the particles. Interestingly, with high inertia particles and at high solid concentration, these structures disappear to the benefit of a one‐dimensional oscillating flow. The shape of these concentration waves is very similar to those previously observed by Nicolas et al. (1999) and Duru et al. (2002). The solid fraction density spectrum and variance have been analyzed and compared with the experimental data of Zenit and Hunt. © 2010 American Institute of Chemical Engineers AIChE J, 2010
Modeling of adsorption isotherm of a binary mixture with real adsorbed solution theory and nonrandom two‐liquid model
Authors: Sochard Sabine , Fernandes Nuno , Reneaume Jean‐Michel 
Published: March 2010

AbstractGas‐phase adsorption equilibria of diluted mixtures of methyl‐ethyl‐ketone and isopropylanol on activated carbon were investigated. Experimental isotherms were determined by a constant volume method. Single‐component adsorption isotherms were fitted by the frequently used Toth model with good accuracy. Then adsorption isotherms were determined for different binary mixtures (with different initial ratio of the two components). Binary mixtures adsorption isotherms were calculated using the adsorbed solution theory. Ideal adsorbed solution theory (IAST) could not represent experimental data, but it was observed that increasing amount of MEK led to higher nonideality of the mixture. Then UNIversal QUAsi Chemical (UNIQUAC) and nonrandom two‐liquids (NRTL) models were considered to describe activity coefficients of the adsorbed phase. The fitted parameters of UNIQUAC model depend on the ratio of the two components, whereas the NRTL model is able to fit all experiments with the same parameters, whatever the initial ratio may be. © 2010 American Institute of Chemical Engineers AIChE J, 2010
Gravitational drainage of compressible organic materials
Authors: Christensen Morten Lykkegaard , Dominiak Dominik Marek , Nielsen Per Halkjær , Keiding Kristian , Sedin Maria 
Published: March 2010

AbstractA model was developed to simulate drainage of compressible particle suspensions, and study how cake compression and volumetric load influence the process. The input parameters were settling velocity, cake resistance and compressibility. These parameters were found using a new experimental method. Dextran‐MnO2 particle suspensions were drained as these resemble organic waste slurries with respect to settling and compressibility. It was demonstrated that cake compressibility must be taken into account to obtain adequate simulations. This implies that pressurized filtration resistances cannot be used for drainage simulations. In the filtration step, a distinct increase of dry matter from top to bottom of the cake was observed. During the subsequent consolidation, the cake compressed and a uniform dry matter profile was found. The final dry matter content of the cake increased with feed concentration and volumetric load. The drainage time increased proportionally with feed concentration and, more importantly, proportionally with squared volumetric load. © 2010 American Institute of Chemical Engineers AIChE J, 2010
The effect of supercritical water on the hydroconversion of Tahe Residue
Authors: Gao Liang , Liu Yuandong , Wen Langyou , Huang Weixia , Mu Xuhong , Zong Baoning , Fan Honglei , Han Buxing 
Published: March 2010

AbstractThe effect of supercritical water (SCW) on the hydroconversion of Tahe residue has been investigated at different temperatures and hydrogen pressures. It was demonstrated that introduction of water into the reaction could reduce the amount of coke formed and increased the yield of liquid product. The isotopic tracer method was used to determine quantitatively the extent of hydrogen exchange between water and the liquid product. The results indicated that the degree of hydrogen exchange of the liquid product with water decreased slightly with increasing hydrogen pressure. About 40% of the water molecules involved in hydrogen exchange with the oil residue as the concentration of water in the reaction mixture was 10 wt %. © 2010 American Institute of Chemical Engineers AIChE J, 2010
Working to eat: Vulnerability, food insecurity, and obesity among migrant and seasonal farmworker families
Authors: Borre Kristen , Ertle Luke , Graff Mariaelisa 
Published: March 2010

AbstractBackgroundFood insecurity and obesity have potential health consequences for migrant and seasonal farm workers (MSFW).MethodsThirty‐six Latino MSFW working in eastern North Carolina whose children attended Migrant Head Start completed interviews, focus groups and home visits. Content analysis, nutrient analysis, and non‐parametric statistical analysis produced results.ResultsMSFW (63.8%) families were food insecure; of those, 34.7% experienced hunger. 32% of pre‐school children were food insecure. Food secure families spent more money on food. Obesity was prevalent in adults and children but the relationship to food insecurity remains unclear. Strategies to reduce risk of foods insecurity were employed by MSFW, but employer and community assistance is needed to reduce their risk.ConclusionsFood insecurity is rooted in the cultural lifestyle of farmwork, poverty, and dependency. MSFW obesity and food insecurity require further study to determine the relationship with migration and working conditions. Networking and social support are important for MSFW families to improve food security. Policies and community/workplace interventions could reduce risk of food insecurity and improve the health of workers. Am. J. Ind. Med. 53:443–462, 2010. © 2010 Wiley‐Liss, Inc.
Selection of sleeping trees in pileated gibbons (Hylobates pileatus)
Authors: Phoonjampa Rungnapa , Koenig Andreas , Borries Carola , Gale George A. , Savini Tommaso 
Published: March 2010

AbstractSelection and use patterns of sleeping sites in nonhuman primates are suggested to have multiple functions, such as predation avoidance, but they might be further affected by range defense as well as foraging constraints or other factors. Here, we investigate sleeping tree selection by the male and female members of one group of pileated gibbons (Hylobates pileatus) at Khao Ang Rue Nai Wildlife Sanctuary, Thailand. Data were collected on 113 nights, between September 2006 and January 2009, yielding data on 201 sleeping tree choices (107 by the female and 94 by the male) and on the characteristics of 71 individual sleeping trees. Each sleeping tree and all trees ≥40 cm diameter at breast height (DBH) in the home range were assessed (height, DBH, canopy structure, liana load) and mapped using a GPS. The gibbons preferentially selected tall (mean=38.5 m), emergent trees without lianas. The majority of the sleeping trees (53.5%) were used only once and consecutive reuse was rare (9.5%). Sleeping trees were closer to the last feeding tree of the evening than to the first feeding tree in the morning, and sleeping trees were located in the overlap areas with neighbors less often than expected based on time spent in these areas. These results suggest avoidance of predators as the main factor influencing sleeping tree selection in pileated gibbons. However, other non‐mutually exclusive factors may be involved as well. Am. J. Primatol. 72:617–625, 2010. © 2010 Wiley‐Liss, Inc.
Upregulation of K2P5.1 potassium channels in multiple sclerosis
Authors: Bittner Stefan , Bobak Nicole , Herrmann Alexander M. , Göbel Kerstin , Meuth Patrick , Höhn Karin G. , Stenner Max‐Philipp , Budde Thomas , Wiendl Heinz , Meuth Sven G. 
Published: March 2010

AbstractObjectiveActivation of T cells critically depends on potassium channels. We here characterize the impact of K2P5.1 (KCNK5; TASK2), a member of the 2‐pore domain family of potassium channels, on T‐cell function and demonstrate its putative relevance in a T‐cell–mediated autoimmune disorder, multiple sclerosis (MS).MethodsExpression of K2P5.1 was investigated on RNA and protein level in different immune cells and in MS patients' biospecimens (peripheral blood mononuclear cells, cerebrospinal fluid cells, brain tissue specimen). Functional consequences of K2P5.1 expression were analyzed using pharmacological modulation, small interfering RNA (siRNA), overexpression, electrophysiological recordings, and computer modeling.ResultsHuman T cells constitutively express K2P5.1. After T‐cell activation, a significant and time‐dependent upregulation of K2P5.1 channel expression was observed. Pharmacological blockade of K2P5.1 or knockdown with siRNA resulted in reduced T‐cell functions, whereas overexpression of K2P5.1 had the opposite effect. Electrophysiological recordings of T cells clearly dissected K2P5.1‐mediated effects from other potassium channels. The pathophysiological relevance of these findings was demonstrated by a significant K2P5.1 upregulation in CD4+ and CD8+ T cells in relapsing/remitting MS (RRMS) patients during acute relapses as well as higher levels on CD8+ T cells of clinically isolated syndrome, RRMS, and secondary progressive multiple sclerosis patients during clinically stable disease. T cells in the cerebrospinal fluid from MS patients exhibit significantly elevated K2P5.1 levels. Furthermore, K2P5.1‐positive T cells can be found in inflammatory lesions in MS tissue specimens.InterpretationSelective targeting of K2P5.1 may hold therapeutic promise for MS and putatively other T‐cell–mediated disorders. ANN NEUROL 2010;68:58–69
Retinal fractals and acute lacunar stroke
Authors: Cheung Ning , Liew Gerald , Lindley Richard I. , Liu Erica Y. , Wang Jie Jin , Hand Peter , Baker Michelle , Mitchell Paul , Wong Tien Y. 
Published: March 2010

AbstractThis study aimed to determine whether retinal fractal dimension, a quantitative measure of microvascular branching complexity and density, is associated with lacunar stroke. A total of 392 patients presenting with acute ischemic stroke had retinal fractal dimension measured from digital photographs, and lacunar infarct ascertained from brain imaging. After adjusting for age, gender, and vascular risk factors, higher retinal fractal dimension (highest vs lowest quartile and per standard deviation increase) was independently and positively associated with lacunar stroke (odds ratio [OR], 4.27; 95% confidence interval [CI], 1.49–12.17 and OR, 1.85; 95% CI, 1.20–2.84, respectively). Increased retinal microvascular complexity and density is associated with lacunar stroke. ANN NEUROL 2010;68:107–111
Linear oligoetherols and polyurethanes with carbazole ring
Authors: Lubczak Renata 
Published: March 2010

AbstractReaction of 9‐(2‐chloroethyl)carbazole with excess of diethanolamine led to 5‐[2‐(carbazol‐9‐yl)ethyl]‐3‐azapentane‐1,5‐diol. The product is well soluble in ethylene and propylene oxides and reacted with them at temperature 60–90°C to give bifunctional oligoetherols with carbazole ring. Structure of these oligoetherols, their physical properties, and application for synthesis of linear polyurethanes were studied in detail. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010
Rapid monitoring of recombinant antibody production by mammalian cell cultures using fourier transform infrared spectroscopy and chemometrics
Authors: Sellick Christopher A. , Hansen Rasmus , Jarvis Roger M. , Maqsood Arfa R. , Stephens Gill M. , Dickson Alan J. , Goodacre Royston 
Published: March 2010

AbstractFourier transform infrared (FT‐IR) spectroscopy combined with multivariate statistical analyses was investigated as a physicochemical tool for monitoring secreted recombinant antibody production in cultures of Chinese hamster ovary (CHO) and murine myeloma non‐secreting 0 (NS0) cell lines. Medium samples were taken during culture of CHO and NS0 cells lines, which included both antibody‐producing and non‐producing cell lines, and analyzed by FT‐IR spectroscopy. Principal components analysis (PCA) alone, and combined with discriminant function analysis (PC‐DFA), were applied to normalized FT‐IR spectroscopy datasets and showed a linear trend with respect to recombinant protein production. Loadings plots of the most significant spectral components showed a decrease in the C–O stretch from polysaccharides and an increase in the amide I band during culture, respectively, indicating a decrease in sugar concentration and an increase in protein concentration in the medium. Partial least squares regression (PLSR) analysis was used to predict antibody titers, and these regression models were able to predict antibody titers accurately with low error when compared to ELISA data. PLSR was also able to predict glucose and lactate amounts in the medium samples accurately. This work demonstrates that FT‐IR spectroscopy has great potential as a tool for monitoring cell cultures for recombinant protein production and offers a starting point for the application of spectroscopic techniques for the on‐line measurement of antibody production in industrial scale bioreactors. Biotechnol. Bioeng. 2010; 106: 432–442. © 2010 Wiley Periodicals, Inc.
Effect of antibody solution conditions on filter performance for virus removal filter Planova™ 20N
Authors: Hongo‐Hirasaki Tomoko , Komuro Masayasu , Ide Shoichi 
Published: March 2010

AbstractWe investigated the effect of antibody solution conditions (ionic strength, pH, IgG concentration, buffer composition, and aggregate level (dimer content)) on filter performance for a virus removal filtration process using the Planova™ 20N, a virus removal filter. Ionic strength and pH affected the filter flux. A consistent high flux was maintained at an ionic strength greater than 10 mM and at pH 4–8 under a typical buffer composition (sodium chloride, citrate, acetate, and phosphate). Optimum IgG concentration was 10–20 mg/mL allowing for high throughput (kg/m2 of IgG). Dimer content negligibly affected the flux level. Under high throughput conditions, virus spiking did not affect flux whereas a parvovirus logarithmic reduction value greater than 5 was maintained. From the results of zeta potential analyses for IgG and the membrane, we considered that electrostatic interactions between antibodies and the membrane affect filter performance (flux level and throughput). These results indicate that the Planova™ 20N filter is applicable for a wide range of solution conditions typically used in antibody processing. © 2010 American Institute of Chemical Engineers Biotechnol. Prog., 2010
Right heterotaxy with Hirschsprung's disease—A new association
Authors: Thambi Dorai C.R. , Hamzaini H. , Rohana R. 
Published: March 2010

AbstractA baby girl with prenatal diagnosis of complex cardiac anomalies and diaphragmatic hernia was born at 36 weeks of gestation. At 4 hr of life, the baby developed respiratory distress and was intubated. She was found to have right hetetrotaxy with total anomalous pulmonary venous drainage into the portal vein, five hepatic veins draining the liver and intrathoracic herniation of the stomach. The child also developed abdominal distension on the second day of life with passage of scanty meconium. The diagnosis of Hirschsprung's disease (HD) was confirmed by histology. HD in association with right heterotaxy has not been reported earlier. The association of heterotaxy with HD in our patient raises a possible genetic link between the two anomalies that needs further research. Clin. Anat. 23:455–459, 2010. © 2010 Wiley‐Liss, Inc.
3D reconstruction from contrast coronary angiography in magnetic percutaneous coronary intervention
Authors: Patterson, Mark 
Published: March 2010

AbstractThe magnetic navigation system allows precision wire‐tip control that is guided by computer generated 3D models based on fluoroscopic images. These images can be post‐processed and the information used to facilitate steering of wires in difficult anatomy. This report illustrates two of these reconstruction software packages in a challenging saphenous vein graft case. © 2010 Wiley‐Liss, Inc.