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Min Wen, Bing Wu, Hua Zhao, Guangmang Liu, Xiaoling Chen, Gang Tian, Jingyi Cai, Gang Jia
This study investigated the effects of dietary zinc on carcass traits, meat quality, antioxidant capacity, and tissue zinc accumulation of Pekin ducks. A total of 768 1-day-old Pekin ducks were randomly allocated to six dietary treatments and penned in groups of 16 with 8 pens per treatment. Ducks were fed a basal corn-soybean meal diet supplemented with graded levels of zinc sulfate (0, 15, 30, 60, 120, 240 mg zinc/kg) for 35 days. The slaughter weight, carcass weight, eviscerated weight, and breast and leg muscle weight of Pekin ducks were increased with increasing dietary zinc levels (P < 0...
October 20, 2018: Biological Trace Element Research
Leipeng Cao, Jingjing Wang, Ting Zhou, Zihan Li, Shuyu Xiang, Fuqing Xu, Roger Ruan, Yuhuan Liu
An innovative spraying system for NH4 + -N removal and recovery was investigated under different pH, temperature, spraying frequency and rate by using spraying system. Results showed that NH4 + -N removal efficiency and mass transfer coefficient (KLa ) value in swine wastewater (SW) remarkably increased with increasing of temperature, spraying frequency and rate due to promoting the diffusion of NH3 molecules caused by increasing specific surface of SW molecule, and high shear force and temperature difference between SW and circulating heating tube...
October 12, 2018: Bioresource Technology
Mahesh R Gadekar, M Mansoor Ahammed
In this study, response surface methodology (RSM)-artificial neural network (ANN) approach was used to optimise/model disperse dye removal by adsorption using water treatment residuals (WTR). RSM was first applied to evaluate the process using three controllable operating parameters, namely WTR dose, initial pH (pHinitial ) and dye concentration, and optimal conditions for colour removal were determined. In the second step, the experimental results of the design data of RSM were used to train the neural network along with a non-controllable parameter, the final pH (pHfinal )...
October 18, 2018: Journal of Environmental Management
Van Du Nguyen, Hyun-Ki Min, Chang-Sei Kim, Jiwon Han, Jong-Oh Park, Eunpyo Choi
An effective nanoparticle-based drug delivery platform holds great promise for non-invasive cancer therapy. This study explores the breast tumor regression in vivo by synergistic photothermal-chemotherapy based on liposomal nanocomplex (folic acid-gold nanorods-anticancer drug-liposome). The proposed liposomal nanocomplex can enhance the tumor targeting by functionalizing folic acid (FA) molecules on the surface of liposome that encapsulates both gold nanorods (AuNRs) and the doxorubicin (DOX) to combine the photothermal therapy and the chemotherapy, respectively...
October 9, 2018: Colloids and Surfaces. B, Biointerfaces
Guojun Chen, Juncheng Han, Yang Mu, Huimin Yu, Liping Qin
Chromium isotope fractionation analysis is a promising approach for the assessment of microbial Cr(VI) reduction in groundwater. Understanding the mechanisms and other parameters that control Cr isotope fractionation factors (between the product Cr(III) and reactant Cr (VI)) in microbial Cr(VI) reduction is critical to this application. To date, such studies are very limited. Here, the influence of critical factors on observed Cr isotope fractionation during Cr(VI) reduction by Shewanella oneidensis MR-1 under various conditions was investigated...
September 29, 2018: Water Research
Zongming Gao, Cindy Ngo, Wei Ye, Jason D Rodriguez, David Keire, Dajun Sun, Hong Wen, Wenlei Jiang
In contrast to nifedipine matrix-based extended-release dosage forms, the osmotic pump drug delivery systems have a zero-order drug release independent of external variables such as pH, agitation rate, and dissolution media. The objective of this study focuses on the in vitro evaluation of the mechanical properties of osmotic pump and polymer matrix-based formulations in dissolution media and the potential impacts that media pH and simulated gastrointestinal contraction have on drug release. Two strengths of osmotic pump product A, and polymer matrix-based product B were used in this study...
October 18, 2018: Journal of Pharmaceutical Sciences
Jay R Dave, Ankush M Dewle, Suhas T Mhaske, Prashant T Phulpagar, Vikas L Mathe, Supriya E More, Ayesha A Khan, Appala Venkata Ramana Murthy, Suwarna S Datar, Ajay J Jog, Megha Page, Geetanjali B Tomar
Parathyroid hormone (PTH) has been a major contributor to the anabolic therapy for osteoporosis, but its delivery to bone without losing activity and avoiding adverse local effects remain a challenge. Being the natural component of bone, use of hydroxyapatite for this purpose brings a major breakthrough in synergistic anabolism. This study focuses on synthesis, characterization and evaluation of in vitro and in vivo efficacy of PTH (1-34) adsorbed hydroxyapatite nanocarrier for synergistic enhancement in the anabolic activity of PTH for bone regeneration...
October 18, 2018: Nanomedicine: Nanotechnology, Biology, and Medicine
Bahareh Tanhaei, Ali Ayati, Mika Sillanpää
In the present study, a novel xanthate modified magnetic chitosan, with Al2 O3 /Fe3 O4 core-shell particle as magnetic core, was synthesized, characterized and used as an efficient adsorbent for the removal of cationic azo dye models. The adsorption study demonstrated that the xanthate modification of magnetic chitosan significantly improves its adsorption activity toward methylene blue and safranin O. The optimized adsorbent dosage was obtained 0.8 mg g-1 and the process was found to be optimal in the wide pH range of 4-11...
October 18, 2018: International Journal of Biological Macromolecules
Jesse Pulido, Maria de Cabrera, Adam J Sobczak, Alejandro Amor-Coarasa, Anthony J McGoron, Stanislaw F Wnuk
The conjugation of 4-N-(3-aminopropanyl)-2'-deoxy-2',2'-difluorocytidine with 2-(p-isothiocyanatobenzyl)-1,4,7-triazacyclononane-1,4,7-triacetic acid (SCN-Bn-NOTA) ligand in 0.1 M Na2 CO3 buffer (pH 11) at ambient temperature provided 4-N-alkylgemcitabine-NOTA chelator. Incubation of latter with excess of gallium(III) chloride (GaCl3 ) (0.6 N AcONa/H2 O, pH = 9.3) over 15 min gave gallium 4-N-alkylgemcitabine-NOTA complex which was characterized by HRMS. Analogous [68 Ga]-complexation of 4-N-alkylgemcitabine-NOTA conjugate proceeded with high labeling efficiency (94%-96%) with the radioligand almost exclusively found in the aqueous layer (∼95%)...
October 12, 2018: Bioorganic & Medicinal Chemistry
Agustín Spaltro, Matías Pila, Sandra Simonetti, Silvia Álvarez-Torrellas, Juan García Rodríguez, Danila Ruiz, Andres Díaz Compañy, Alfredo Juan, Patricia Allegretti
In this study, commercial activated carbons (GAB and CBP) were successfully used for the removal of two phenoxy acetic class-herbicides, 4-chloro-2-methyl phenoxy acetic acid and 2.4-dichlorophenoxy acetic acid (MCPA and 2.4-D) from aqueous solution. The adsorbent materials were characterized, and their equilibrium adsorption capacity was evaluated. The results suggest that the microporous properties of GAB activated carbon enhanced the adsorption capacity, in comparison to CBP carbon. Thus, the increasing in the ionic strength favored the adsorption removal of both pesticides, indicating that electrostatic interactions between the pollutant and the adsorbate surface are governing the adsorption mechanism, but increasing pH values decreased adsorption capacity...
October 12, 2018: Journal of Contaminant Hydrology
Erika Paola Grijalba, Carlos Espinel, Paola Emilia Cuartas, Martha Liliana Chaparro, Laura Fernanda Villamizar
The insect-pathogenic fungus Metarhizium rileyi is highly sensitive to nutritional and environmental conditions which makes it difficult to produce as a stable biopesticide. In this study, a Colombian isolate of this fungus was produced in bulk, and conidia were formulated as an emulsifiable concentrate (EC). The stability of formulated conidia was studied. Conidial viability was maintained at >85 % viability for 12 m under refrigeration and for >three months at 18 °C. The pH values were stable, while contaminant content was significantly reduced...
November 2018: Fungal Biology
Zhaojun Zheng, Xubiao Wei, Tingting Shang, Yan Huang, Cong Hu, Rijun Zhang
BACKGROUND: As the protein-laden by-product, red blood cells (RBCs) from poultry blood is a potential source of protein used as food and feed ingredient. However, RBC was currently underutilized. Therefore, it is an urgent need to develop feasible and cost-effective methods for converting poultry waste into nutritional and functional products. RESULTS: To take full advantage of this poultry waste, peptide hydrolysate was produced by deep controllable bioconversion of RBC, by means of synergistic combination of neutrase and flavourzyme...
October 20, 2018: BMC Biotechnology
Marta Jiménez-Salcedo, Miguel Monge, María Teresa Tena
The photocatalytic degradation of ibuprofen with TiO2 nanoparticles (NPs) and UV light and with graphitic carbon nitride (g-C3 N4 ) 2D nanosheets and visible light are proposed and compared as advanced oxidation treatments for the removal of ibuprofen in water. By-products formed with both photocatalytic systems have been tentatively identified based on the results of ultra-high-performance liquid chromatography coupled to high-resolution mass spectrometry, using a quadrupole-time of flight mass spectrometer in positive and negative ionization modes, which allowed to obtain the elementary composition of their precursors and fragment ions...
October 9, 2018: Chemosphere
Weicong Liu, Xin Shen, Yaoyao Han, Zhaohui Liu, Wei Dai, Archisman Dutta, Abhinav Kumar, Jianqiang Liu
The adsorption capacity of three representative pharmaceutical drugs and personal care products (PPCPs) viz. diclofenac sodium (DCF), chlorpromazine hydrochloride (CLF) and amodiaquin dihydrochloride (ADQ), were preliminarily studied using a water-stable Cu(II)-based metal organic framework (MOF) [Cu(BTTA)]n ·2DMF (1) (H2 BTTA = 1,4-bis(triazol-1-yl)terephthalic acid). We also investigated the factors influencing the adsorption such as concentration, pH, contact time, temperature and dosages. The results show that the adsorption capacity of 1 for DCF (650 mg g-1 ) from aqueous medium, which is higher in comparison to most of the reported MOFs...
October 15, 2018: Chemosphere
John O Unuofin, Anthony I Okoh, Uchechukwu U Nwodo
Agroindustrial residual lignocellulosic biomaterial provides an economical and renewable natural bioresource for the large-scale, gainful biofuel production, as well as the production of fine bulk chemicals, which may include industrial biocatalysts. To this end, the laccase-inducing aptitude of some agroindustrial, lignocellulosic residues were appraised in submerged fermentation batch culture of two woodland betaproteobacteria (Hb9c; Achromobacter xylosoxidans HWN16, Hb16c; Bordetella bronchiseptica HSO16)...
October 17, 2018: Journal of Environmental Management
Meigui Yang, Jing Shi, Zhengwen Xu, Siyi Zhu, Yixin Cui
The excessive release of phosphorus is a main cause of eutrophication, but phosphorus itself is an important non-renewable resource. If phosphorus could be recovered from wastewater, it can not only reduce the pollution, but also reach the aim of resource recycle. An induced crystallization process was combined with the schorl/H2 O2 system to remove and recover phosphorus from the fosfomycin pharmaceutical wastewater. Firstly, in the schorl/H2 O2 heterogeneous Fenton system, the organic phosphorus (OP) in fosfomycin pharmaceutical wastewater was transformed to the inorganic phosphorus (IP), and then IP was recovered by hydroxyapatite (HAP) induced crystallization process...
October 17, 2018: Journal of Environmental Management
Zedong Teng, Wen Shao, Keyao Zhang, Yaoqiang Huo, Min Li
Phosphate solubilizing bacteria (PSB) were isolated from heavy metal contaminated soils and their potentials for lead (Pb) immobilization in soil were studied in this paper. 53 PSB strains were isolated and their minimum inhibitory concentrations (MICs) for lead were determined. The results showed that strains B3, B4, B10, F2-1 and L1-5 had relatively high lead resistant capabilities with MICs ranged from 0.5 to 8 mM, and were identified as species of Leclercia adecarboxylata and Pseudomonas putida by 16S rRNA...
October 17, 2018: Journal of Environmental Management
Songhua Lu, Kairuo Zhu, Tasawar Hayat, Njud S Alharbi, Changlun Chen, Gang Song, Diyun Chen, Yubing Sun
Cubic perovskite (CaTiO3 ) was successfully synthesized by a facile solvothermal method and was utilized to sequestrate U(VI) from aqueous solutions. The batch experiments revealed that carbonate inhibited U(VI) sequestration at pH > 6.0 due to the formation of uranyl-carbonate complexes. The maximum sequestration capacity of U(VI) on perovskite was 119.3 mg/g (pH 5.5). The sequestration mechanism of U(VI) on perovskite were investigated by XPS and EXAFS techniques. According to XPS analysis, the presence of U(IV) and U(VI) oxidation states revealed the photocatalytic reduction of U(VI) by perovskite under UV-vis irradiation...
October 13, 2018: Journal of Hazardous Materials
Heng-Yue Xue, Jing-Ru Li, Yan-Geng Liu, Qi Gao, Xiao-Wen Wang, Jun-Wei Zhang, Masaru Tanokura, You-Lin Xue
Ultrafiltration is a separation process for purifying and concentrating macromolecular solutions. Using Baiyu yam (Dioscorea opposita Thunb) as the raw material, single-factor experiments, Box-Behnken design (BBD) and response surface methodology (RSM) were employed to investigate the effects of the ultrafiltration pH, temperature and pressure on the extraction rate of Chinese yam polysaccharide (CYP). The constructed regression model is highly significant, and the optimal ultrafiltration-assisted extraction conditions were determined to be the following: pH 6...
October 17, 2018: International Journal of Biological Macromolecules
Shahid-Ul-Islam, B S Butola
Chitosan is partially or completely N-deacetylated derivative of chitin and is chemically composed of β‑(1, 4) linked 2‑amino‑2‑deoxy‑β‑d‑glucopyranose. Biocompatibility, non-toxicity, antifungal activity, water-binding capacity, bioactivity and antimicrobial properties make chitosan particularly attractive substitute for synthetic polymers in different application fields and notably in the textile industry. The presence of reactive amino and hydroxyl groups along the backbone conifer chitosan some interesting properties for use in textile dyeing and finishing...
October 17, 2018: International Journal of Biological Macromolecules
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