Removal of Dispersed Dyes from Aqueous Solution Using Activated Carbon Prepared from Olive Stones     

Sabrina Hemsas  ;Hakim Lounici  ;Zohra Belkebi  ;Khaled Benrachedi 《农业科学与技术》2014,(5):414-421

In order to valorize olive stones and to show its potential use in the sorption of two dispersed dyes, it was transformed in activate carbon and characterized. The effects of different system variables： pH, agitation speed, temperature and initial dye concentration were studied in the batch tests. The adsorption capacity of activated carbon for the dyes removal was found to be affected by the solution＇s pH. Acidic pH was found the favour disperse dyes removal. Over 95% removal was achieved for both the dyes at pH 3. The equilibrium time for both dyes was 30 min. Both Langmuir and Freundlich isotherms could be used to describe the adsorption of the dyes. Freundlich adsorption model succeeded in fitting the adsorption isotherms of dyes on olive stones activated carbon in single-solute systems, and prediction of the competitive adsorption behavior of dyes with the Freundlich-based Sheindorf-Rebuhn-Sheintuch （SRS） model gave acceptable results.  相似文献   

Evaluation of glycoproteins purified from adult and larval camel ticks (Hyalomma dromedarii) as a candidate vaccine     

Amr E. El Hakim  Yasser E. Shahein  Sobhy Abdel-Shafy  Amira M. K. Abouelella  Ragaa R. Hamed 《Journal of veterinary science (Suw?n-si, Korea)》2011,12(3):243-249

In order to identify antigens that can help prevent camel tick infestations, three major glycoproteins (GLPs) about 97, 66 and 40 kDa in size were purified from adult and larval Egyptian ticks, Hyalomma (H.) dromedarii, using a single-step purification method with Con-A sepharose. The purified GLPs were evaluated as vaccines against camel tick infestation in rabbits. The rabbits received three intramuscular inoculations of GLPs (20 µg/animal) on days 0, 14, and 28. In the immunoblot analysis, Sera from the immunized rabbits recognized the native GLPs and other proteins from larval and adult H. dromedarii ticks along with those from other tick species such as Rhipicephalus sanguineus but not Ornithodoros moubata. The effects of immunity induced by these GLPs were determined by exposing rabbits to adult H. dromedarii ticks. These results demonstrated that GLP immunization led to a slightly decreased reproductive index and significantly reduced rates of egg hatchability. These results demonstrated that immunization with the purified GLPs can provide protection against infestation by H. dromedarii and some other tick species. Further studies are needed to confirm the effectiveness of immunization with GLPs against other tick species.  相似文献   

Elasticity, microstructure and thermal stability of foliage and fruit fibres from four tropical crops     

M. Syukran Alhelmy Seri Buana  Pooria Pasbaskhsh  Kheng Lim Goh  Farshid Bateni  Mas Rosemal Hakim Mas Haris 《Fibers and Polymers》2013,14(4):623-629

A comparative analysis of the elasticity, microstructure and thermal stability of fibres (thickness ranging from 43.4 to 189.4 µm) isolated from pineapple leaves (PALF), coconut coir (COIR), banana leaf-stem (BAN) and oil palm empty fruit bunch (OPEFB) reported in this study. Statistical analysis of the mechanical properties derived from tensile test to rupture reveals significant differences (P<0.05) in the fibre strength (σ), stiffness (E) and extensibility (parameterized by the strain to rupture, ?). It is observed that COIR fibres yield the smallest strength, σ (=99.8±22.5 MPa), and stiffness, E (= 0.5±0.1 GPa), while PALF fibres yield the largest σ (=639.5±301.6 MPa) and E (=7.1±3.1 GPa); PALF fibres exhibit the smallest ? (=0.11±0.03) but OPEFB fibres yield the largest ? (=2.0±1.3). From scanning electron micrographs, it is observed that cellulose fibril rupture predominates in OPEFB, COIR and BAN fibres; a large proportion of the cellulose fibrils fail by pullout in PALF fibres. Thermogravimetric analysis reveals that all fibres are thermally stable up to 250 °C; the fibre residue ranges from 30 to 80 wt% after heating to 500 °C. In particular, BAN experiences the highest weight loss and PALF experiences the lowest weight loss. The findings lend to a simple approach for determining the performance of the composites by assessing the type of natural fibres for reinforcing polymeric matrices.  相似文献   

Dietary supplementation with low molecular weight sodium alginate improves growth,haematology, immune reactions and resistance against Aeromonas hydrophila in Clarias gariepinus     

Ahmed N. F. Neamat‐Allah  Abd elhakeem I. El-Murr  Yasser Abd El‐Hakim 《Aquaculture Research》2019,50(5):1547-1556

A few studies have illustrated the effects of sodium salt derived from alginic acid on different fish species. However, little is known about the effect of sodium alginate on catfish (Clarias gariepinus). Therefore, this study was performed to assess the use of low molecular weight sodium alginate ( LMWSA) in C. gariepinus. A total of 180 apparently healthy C. gariepinus with a mean body weight of 45 g were randomly divided into three equal groups (D1, D2 and D3). D1 the control group received a control diet, while D2 and D3 received 1% and 3% LMWSA, respectively, for 8 weeks. A challenge test against Aeromonas hydrophila was performed on 15 randomly selected catfish for 15 days. At the end of the experiment, catfish in D3 that received a diet of 3% LMWSA showed significant increases in the final body weight, weight gain and thermal‐unit growth coefficient compared with those in D2 and D1. There was a significant decrease in the erythrogram in D1 after the 4‐day pathogen challenge. A leucogram revealed leucocytosis, heterophilia and lymphocytosis in catfish in D2 and D3 compared with those in D1. After the 4‐day challenge, the following changes took place: lysozyme, nitric oxide, phagocytic activity and the respiratory burst were significantly elevated in catfish that received LMWSA and were more pronounced in D3 than in D1. The mortalities of catfish have been stopped after pathogen challenge from 8‐day in D1 and D2 where at 6‐day in D3. Thus, administration of 1% and 3% LMWSA enhances the growth, immune response and resistance of C. gariepinus against A. hydrophila.  相似文献   

Identification and selection of resistance to Bemisia tabaci among 550 cotton genotypes in the field and greenhouse experiments     

Lizhen ZHU  Jianying LI  Zhongping XU  Hakim MANGHWAR  Sijia LIANG  Suli LI  Muna ALARIQI  Shuangxia JIN  Xianlong ZHANG 《农业科学与工程前沿(英文版)》2018,5(2):236

Plants have developed sophisticated systems to cope with herbivore challenge, including morphological barriers and secondary metabolites to reduce damage. In this study, 550 Gossypium genotypes were evaluated for whitefly (Bemisia tabaci) resistance in five experiments including two in the field and three in the greenhouse, with 23 resistant and 19 susceptible genotypes selected. Whitefly-resistance index determination showed that a leaf having a high density of hairs had resistance to whitfly egg/nymph production. Longer leaf hairs were also important for resistance. This study revealed that okra shaped leaves reduced adult whitefly oviposition preference, while glabrous leaves and high hair density helped not only in the reduction of the adults but also decreased oviposition preference. Gossypol was also observed to be involved in the reduction of adult whitefly development and/or survival.  相似文献   

Livestock feed resources availability,feeding practices,and nutrient balances in high Himalaya (Gurez) valley of Kashmir     

Beigh  Yasir Afzal  Ganai  Abdul Majeed  Rather  Mohammad Ashraf  Athar  Hakim  Hamdani  Shabeer Ahmad 《Tropical animal health and production》2020,52(5):2469-2480

Tropical Animal Health and Production - Assessment of the ruminant livestock feed sources availability, existing feeding practices, and nutrient balances was embarked at different zones of Gurez...  相似文献   

Andalasin A, a new stilbene dimer from Morus macroura     

Syah YM  Achmad SA  Ghisalberti EL  Hakim EH  Iman MZ  Makmur L  Mujahiddin D 《Fitoterapia》2000,71(6):630-635

A new stilbene dimer, andalasin A (1), together with the known stilbene oxyresveratrol and the 2-arylbenzofuran glycoside mulberroside C, have been isolated from the wood of Morus macroura. The structure of the new compound was elucidated on the basis of spectroscopic data. Compound 1 shows weak antinematodal and moderate antifungal properties.  相似文献   

Cytotoxic resveratrol oligomers from the tree bark of Dipterocarpus hasseltii     

Muhtadi  Hakim EH  Juliawaty LD  Syah YM  Achmad SA  Latip J  Ghisalberti EL 《Fitoterapia》2006,77(7-8):550-555

A new resveratrol tetramer, named diptoindonesin E, was isolated from the acetone extract of the tree bark of Dipterocarpus hasseltii, together with five known resveratrol oligomers (-)-epsilon-viniferin, laevifonol, (-)-alpha-viniferin, vaticanol B, (-)-hopeaphenol, and a coumarin, scopoletin. The structures of these compounds were determined from spectroscopic evidence. Cytotoxicity test of the isolated compounds showed that hopeaphenol strongly inhibited murine leukemia P-388 cells.  相似文献   

Effect of some antibiotics as growth promoters on performance of broiler chicks fed different protein levels     

N F Abdel Hakim  E A Hilali  A A Amer  T M Younis 《Archives of Animal Nutrition》1989,39(1-2):97-104

This work was carried out to study the effect of different sources of dietary antibiotics (Zinc bacitracin, Flavomycin, Virginiamycin) in rations with optimal protein levels (starter phase: 23.5%, finisher phase: 20.0%) and low protein levels (starter phase: 19.6%, finisher phase: 17.0%) on broiler performance with 8 groups of 75 broiler each. The supplement of diets, containing the optimal and low protein level, with antibiotics increased the body weight after 7 weeks of age and improved the feed conversion as compared with control groups. Virginiamycin was superior in increasing body weights after 7 weeks of age and in improving the feed conversion with rations containing low protein level when compared with zinc bacitracin and Flavomycin. When broiler rations, low in the protein content, were supplemented with antibiotics, they could not substitute the difference in optimal protein level. Antibiotics supplementation increased the value of improvement in production efficiency and this was more pronounced with Virginiamycin.  相似文献   

Andalasin A, a new stilbene dimer from Morus macroura     

Yana M. Syah  Sjamsul A. Achmad  Emilio L. Ghisalberti  Euis H. Hakim  Muhammad Z. N. Iman  Lukman Makmur  Didin Mujahiddin 《Fitoterapia》2000,71(6)

A new stilbene dimer, andalasin A (1), together with the known stilbene oxyresveratrol and the 2-arylbenzofuran glycoside mulberroside C, have been isolated from the wood of Morus macroura. The structure of the new compound was elucidated on the basis of spectroscopic data. Compound 1 shows weak antinematodal and moderate antifungal properties.  相似文献