Advances in Heterogeneous Photocatalytic Degradation of Phenols and Dyes in Wastewater: A Review     

Saber Ahmed  M. G. Rasul  Wayde N. Martens  Richard Brown  M. A. Hashib 《Water, air, and soil pollution》2011,215(1-4):3-29

The heterogeneous photocatalytic water purification process has gained wide attention due to its effectiveness in degrading and mineralizing the recalcitrant organic compounds as well as the possibility of utilizing the solar UV and visible light spectrum. This paper aims to review and summarize the recently published works in the field of photocatalytic oxidation of toxic organic compounds such as phenols and dyes, predominant in wastewater effluent. In this review, the effects of various operating parameters on the photocatalytic degradation of phenols and dyes are presented. Recent findings suggested that different parameters, such as type of photocatalyst and composition, light intensity, initial substrate concentration, amount of catalyst, pH of the reaction medium, ionic components in water, solvent types, oxidizing agents/electron acceptors, mode of catalyst application, and calcinations temperature can play an important role on the photocatalytic degradation of organic compounds in water environment. Extensive research has focused on the enhancement of photocatalysis by modification of TiO₂ employing metal, non-metal, and ion doping. Recent advances in TiO₂ photocatalysis for the degradation of various phenols and dyes are also highlighted in this review.  相似文献   

Molecular characterization of a 13-amino acid deletion in VP1 (1D) protein and novel amino acid substitutions in 3D polymerase protein of foot and mouth disease virus subtype A/Iran87     

Majid Esmaelizad  Saber Jelokhani-Niaraki  Khadije Hashemnejad  Morteza Kamalzadeh  Mohsen Lotfi 《Journal of veterinary science (Suw?n-si, Korea)》2011,12(4):363-371

The nucleotide sequence of the VP1 (1D) and partial 3D polymerase (3D^pol) coding regions of the foot and mouth disease virus (FMDV) vaccine strain A/Iran87, a highly passaged isolate (~150 passages), was determined and aligned with previously published FMDV serotype A sequences. Overall analysis of the amino acid substitutions revealed that the partial 3D^pol coding region contained four amino acid alterations. Amino acid sequence comparison of the VP1 coding region of the field isolates revealed deletions in the highly passaged Iranian isolate (A/Iran87). The prominent G-H loop of the FMDV VP1 protein contains the conserved arginine-glycine-aspartic acid (RGD) tripeptide, which is a well-known ligand for a specific cell surface integrin. Despite losing the RGD sequence of the VP1 protein and an Asp₂₆→Glu substitution in a beta sheet located within a small groove of the 3D^pol protein, the virus grew in BHK 21 suspension cell cultures. Since this strain has been used as a vaccine strain, it may be inferred that the RGD deletion has no critical role in virus attachment to the cell during the initiation of infection. It is probable that this FMDV subtype can utilize other pathways for cell attachment.  相似文献   

Interactional Impacts of Drought and Weed Stresses on Nutritional Status of Seeds and Water Use Efficiency of Peanut Plants Grown in Arid Conditions     

El-Metwally  Ibrahim Mohamed  Saudy  Hani Saber 《Gesunde Pflanzen》2021,73(4):407-416

Gesunde Pflanzen - Globally, rationalizing and converting each drop of irrigation water into food is a crucial act in agricultural production, particularly with climatic change concerns....  相似文献   

ORF8 ∆382 Mutation: A Possible Viral Prognostic Biomarker for the Severity of the COVID-19     

Alireza Tabibzadeh  Maryam Esghaei  Farhad Zamani  Saber Soltani  Parastoo Yousefi  Mohammad Hadi Karbalaie Niya 《Iranian Biomedical Journal》2021,25(4):308

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Studies on Microbial Fertilizers. III. Effect of phosphate and silicate dissolving bacteria on the uptake of phosphorus and potassium from calcareous soils by sorghum helepensis     

M. S. M. Saber  A. F. El-Sherif  A. Z. Osman 《植物养料与土壤学杂志》1975,138(6):613-619

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Biological Activities of Freshwater Algae,Spirogyra singularis Nordstedt     

Seyed Fazel Nabavi  Mohammad Ali Ebrahimzadeh  Naser Jafari  Saber Yazdanpanah 《Journal Of Aquatic Food Product Technology》2013,22(1):58-65

Spirogyra is commonly found as accessible algae in freshwater areas all over the world. Some medical uses have been reported from this genus. Biological activities of Spirogyra singularis were investigated employing eight in vitro assays. The extract showed different antioxidant activity. IC₅₀ for DPPH radical-scavenging was 4.71 ± 0.11 μg mL^?1. The extract showed very strong nitric oxide-scavenging activity with IC₅₀ = 77.3 ± 2.07 μg mL^?1, but its Fe²⁺ chelating ability was weak. The extract also exhibited high antioxidant activity in hemoglobin-induced linoleic acid peroxidation tests and scavenging of hydrogen peroxide. The extract also showed good antihemolytic activity. The total amount of phenolic content in the extract was determined as gallic acid equivalents, and total flavonoid content was calculated as quercetin equivalents. Biological activities may be attributed, at least in part, to the presence of phenol and flavonoid contents in the extract.  相似文献   

Microsatellite-Aided Screening for Fertility Restoration Genes(Rf)Facilitates Hybrid Improvement     

El-Namaky Raafat  Sedeek Saber  Dea Moukoumbi Yonnelle  Ortiz Rodomiro  Manneh Baboucarr 《水稻科学》2016,23(3):160

DNA markers enabled to determine the chromosomal locations of the two Rf genes(Rf3 and Rf4) in the wild-abortive cytoplasmic male sterility(WA-CMS) system. Four simple sequence repeats(SSRs) RM171, RM258, RM315 and RM443 were used to detect the allelic status with respect to the fertility restoration genes(Rf3 and Rf4) in 300 rice cultivars or breeding lines. The results revealed that out of 300 lines, 90 lines screened had Rf3, 65 lines had Rf4, and 45 lines had Rf3 and Rf4 alleles. Furthermore, 45 lines selected using SSR markers were mated with a CMS line(IR58025A) to analyze their restoring ability. Offspring of all the test lines except HHZ8-SAL9DT1-Y1, HHZ5-SAL9-Y3-1 and IDSA77 exhibited higher pollen and spikelet fertility( 80%), thus confirming they bear the Rf alleles. The hybrid offspring of ARH12-6-1-1-B-3-1, IR32307-10-3-2-1 and Sahel 329 had the highest pollen fertility(97.39%, 98.30% and 97.10%, respectively) and spikelet fertility(95.10%, 97.07% and 96.10%, respectively).  相似文献   

Salinity effects on osmoregulation and gill morphology in juvenile Persian sturgeon (<Emphasis Type="Italic">Acipenser persicus</Emphasis>)     

Seyedeh Ainaz Shirangi  Mohammad Reza Kalbassi  Saber Khodabandeh  Hojatollah Jafarian  Catherine Lorin-Nebel  Emilie Farcy  Jehan-Hervé Lignot 《Fish physiology and biochemistry》2016,42(6):1741-1754

The effect of abrupt and 5-day gradual salinity transfers from freshwater (FW) to 11 ‰ Caspian Sea brackish water (BW) was investigated in juvenile Persian sturgeon Acipenser persicus with three different weight groups: 1–2 g (1.62 ± 0.27 g), 2–3 g (2.55 ± 0.41 g) and 3–5 g (4.28 ± 0.76 g). Mortality rates, blood osmotic pressure, gill morphology and branchial Na⁺, K⁺-ATPase (NKA) activity were measured 4 and 10 days after abrupt transfer and 9 and 15 days after the initial gradual transfer (i.e. 4 and 10 days after reaching Caspian Sea salinity). Fish under 3 g could not survive increased salinity, and the blood osmotic pressure of the remaining surviving fish increased and remained elevated. However, heavier fish were able to survive and successfully acclimate, even to rapid salinity change with osmotic pressure reduced to Caspian Sea osmolality levels. At the gill level, the developmental increase in chloride cell volume and a higher NKA content most probably allow juveniles weighing more than 2 g to sharply increase NKA activity if the fish are transferred to BW. The rapid chloride cell proliferation occurring with increased salinity should strengthen this acclimation response. Therefore, a drastic physiological change occurs when fish weigh more than 2 g that allows migration to higher salinities. The triggering signal on chloride cells must be further investigated in order to optimize this functional step.  相似文献   

Herbivore‐induced plant volatiles allow detection of Trichoplusia ni (Lepidoptera: Noctuidae) infestation on greenhouse tomato plants     

Saber Miresmailli  Regine Gries  Gerhard Gries  Ruben H Zamar  Murray B Isman 《Pest management science》2010,66(8):916-924

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A New Method of Preparing Gel for DGT Technique and Application to the Soil Phosphorus Availability Test     

Saber Heidari  Shahin Oustan  Ali Olad 《Communications in Soil Science and Plant Analysis》2016,47(10):1239-1251

There are different methods for soil phosphorus (P) availability assessment. Researchers have recently introduced a new method called diffusive gradients in thin films (DGT) to evaluate P availability in soils. The aim of this study was manufacturing DGT gel using copolymerization of acrylamide and allylic double bonds agarose to replace the patented agarose as a cross-linker. We evaluated the efficacy of the prepared gel and used the assembled DGT with that gel in 10 calcareous soils. We compared the available P measured with the assembled DGT in those soils to Olsen’s P measured in the same soils. Corn plant (Zea mays L.) was also grown in those soils in a greenhouse for two months. Results showed that the diffusion coefficient of P ions in the gel with 0.3% of allylagarose at 25 °C was 6.9 * 10^–6 cm².s^?1, implying that P ions were allowed to diffuse freely through the prepared diffusive gel. Measured P by the assembled DGT showed a close linear correlation (r² = 0.98) with the P concentrations measured in soil solutions extracted by the Olsen method. This demonstrates the prepared allylagarose cross-linked gels’ efficiency and thus the reliability of the assembled DGT in easily and rapidly measuring the soil’s available P. The P, as measured by the assembled DGT in the examined soils, indicated a little lower correlation coefficient (r = 0.77) than those measured by the Olsen method (r = 0.88). However, the CE values measured by DGT showed a good correlation with P uptake by the roots (r = 0.88, p ≤ 0.01). The best correlation between CE and P content in corn occurred for the measurements made after 48 h of DGT placement in soils. The 20-h measurements had about the same r value, indicating that 20 h is sufficient for the placement of DGT assembly in the soil before its removing and measuring the available P. According to our findings, acrylamide—allylagarose gel as a diffusive gel in DGT was found to be suitable for P measurements in both aqueous solutions and soil.  相似文献