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Photocatalytic degradation of aqueous Methyl Orange using nitrogen-doped TiO_2 photocatalyst prepared by novel method of ultraviolet-assisted thermal synthesis

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Journal of Environmental Sciences 2018年第4期30卷 81-93页

作者： Mohsen Nasirian Mehrab mehrvar Graduate Programs in Environmental Applied Science and Management Ryerson University Department of Chemical Engineering Ryerson University

A nitrogen-doped titanium dioxide composite photocatalyst（N–TiO2） with heterojunction structures is synthesized by three different approaches： a novel UV-assisted thermal synthesis, annealing, and microwave technique. Photocatalytic activities of synthesized photocatalysts are evaluated by the degradation of Methyl Orange under ultraviolet light types A（UV-A）, B（UV-B）, and C（UV-C）, visible light, and direct sunlight irradiation. Results show that by using N–TiO_2 photocatalyst prepared by the UV-assisted thermal synthesis and annealing, the degradation increases by 16.5% and 20.4%, respectively, compared to that by bare TiO2. The best results are obtained at a nitrogen to TiO2 mass ratio of 0.15（N：TiO2）. The enhancement of the photocatalytic activity observed in the visible range is mainly attributed to the increasing separation rate of photogenerated charge carriers. The novel UV-assisted thermal synthesis has produced encouraging results as a preparation method for the nitrogen-doped TiO2 photocatalyst; thus, further studies are recommended for process optimization, immobilization, and scale-up to evaluate its applicability in wastewater treatment.

关键词： Ultraviolet-assisted thermal synthesis N–TiO2 Photocatalysis Advanced oxidation processes

荧光增白剂对伊朗核型多角体病毒分离株对棉铃虫幼虫的杀虫活性的增效作用(英文)

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昆虫学报 2013年第6期56卷 708-714页

作者： Ali mehrvar Department of Plant Protection Faculty of AgricultureUniversity of Maragheh-***MaraghehIran

在室内条件下调查了几种荧光增白剂对采自伊朗East-Azarbaijan的棉铃虫Helicoverpa armigera核型多角体病毒两个地域株(EAZ-I和EAZ-II)对棉铃虫2龄幼虫的杀虫活性,以提高这两个地域株的生物学活性。结果表明:与EAZ-II相比,EAZ-I的杀虫... 详细信息

在室内条件下调查了几种荧光增白剂对采自伊朗East-Azarbaijan的棉铃虫Helicoverpa armigera核型多角体病毒两个地域株(EAZ-I和EAZ-II)对棉铃虫2龄幼虫的杀虫活性,以提高这两个地域株的生物学活性。结果表明:与EAZ-II相比,EAZ-I的杀虫活性强,其对棉铃虫幼虫的LC50和LT50值低(分别为1.98×103OB/mL和122.7h)。本研究所用的所有荧光增白剂均能有效增强病毒的生物学活性,特别是0.2%的TinopalF-3543与EAZ-I混用对棉铃虫幼虫的LC50值最低(5.16×102OB/mL),与病毒单独应用相比活性增强了3.84倍。幼虫致死的相对速率测定结果表明,荧光增白剂提高了菌株的LT50值,其中TinopalF-3543的效果最佳。这些结果说明,在害虫综合治理中影响围食膜通透性的荧光增白剂与核型多角体病毒制剂混用是一种可供选择的重要方法。

关键词：棉铃虫核型多角体病毒地域株荧光增白剂杀虫活性增效作用致死中时致死终浓度

伊朗棉铃虫核型多角体病毒三个分离株在规模化生产中的产量参数(英文)

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昆虫学报 2013年第10期56卷 1229-1234页

作者： Ali mehrvar Department of Plant Protection Faculty of AgricultureUniversity of Maragheh

对采自伊朗阿塞拜疆东部西红柿大田的棉铃虫Helicoverpa armigera核型多角体病毒3个分离株[Maragheh(MRG),Nebrin(NBN)和Marand(MRD)]繁殖的3个主要参数(幼虫期、接种剂量和培养温度)进行了研究,以在室内条件下筛选很有前景的分离株。... 详细信息

对采自伊朗阿塞拜疆东部西红柿大田的棉铃虫Helicoverpa armigera核型多角体病毒3个分离株[Maragheh(MRG),Nebrin(NBN)和Marand(MRD)]繁殖的3个主要参数(幼虫期、接种剂量和培养温度)进行了研究,以在室内条件下筛选很有前景的分离株。在测试的各龄幼虫中,5龄初期幼虫的病毒产量最高。最适接种剂量和接种温度分别为1 965.87 OB/mm2和25℃。而在所有测试中,采自Nebrin的NBN分离株在规模化生产中表现最佳。

关键词：棉铃虫核型多角体病毒规模化生产产量参数接种剂量培养温度

昆虫病原真菌与硅藻土混用对四纹豆象的毒力效果(英文)

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昆虫学报 2012年第11期55卷 1282-1288页

作者： Neda NABAEI Ali mehrvar Moosa SABER Mohammad BAGHERI Department of Plant Protection Faculty of AgricultureUniversity of Maragheh Department of Plant Protection Faculty of AgricultureAzarbaijan Shahid Madani University

在室内条件下检测了白僵菌Beauveria bassiana（Balsamo）Vuillemin菌株IRAN-187C和金龟子绿僵菌Metarhizium anisopliae （Metschnikow）Sorokin菌株 A-396 分别与硅藻土（DE）制剂（InsectoSec）~混用对四纹豆象Callosobruchus maculatus成虫的毒力效果。结果表明：硅藻土与致死剂量和亚致死剂量的真菌分离物混用导致了四纹豆象成虫的高死亡率,且这些处理均缩短了真菌的致死中时（LT50）。LC50的白僵菌***菌株IRAN-187C和LC50的DE混用对四纹豆象的 LT50（122.2h）最低,在95%置信限上与LC50的金龟子绿僵菌***菌株A-396与LC50的DE混用得到的LT50（128.2h）相当,说明两种真菌分离物与DE混用对四纹豆象成虫都具有较好的毒力效果。用四纹豆象成虫检测3个温度（22,27和30℃）和2个相对湿度（40%和55%）组合对DE活性的影响,结果显示30℃和40%相对湿度条件下得到的LT50（110.11h）最低,说明高温低湿条件下DE活性较高。

关键词：四纹豆象白僵菌金龟子绿僵菌硅藻土毒力致死中浓度致死中时死亡率

Comparison of Two Different Protocols for Induction of Parturition in Heifers with or without Estradiol Benzoate

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Journal of Life Sciences 2017年第1期11卷 30-34页

作者： Najmeh mehrvar Hossein Hamali Adel Saberivand Graduated Student Veterinary Faculty University of Tabriz Tabriz 51666164 71 Iran Department of Clinical Sciences Veterinary Faculty University of Tabr& Tabr& *** Iran

Objectives of this study were to investigate the efficacy of dexamethasone in combination with estradiol benzoate in controlled induction of parturition in heifers, especially in the subjects of retained fetal membranes and dystocia caused by fetal oversize. A total number of 100 Holstein-Friesian heifers aged 24-25 months, mean weight 450 kg and body condition score of 3-4 from a dairy herd located in the suburb of Tabriz with similar nutrition and management systems were allocated at random into two groups. Group A （Control, n = 50） heifers, after passing the minimum 270 d of pregnancy were injected with 30 mg dexamethasone IM. Group B （Treatment, n = 50） heifers with the same period of pregnancy received 30 mg dexamethasone plus 20 mg estradiol benzoate IM on the same days of pregnancy. The overall durations of initial treatments to induction of parturition were （41.50 ~ 2.65） h in group A and （37.50 ：i： 1.27） h in group B. In group A, more dystocia cases were observed than in group B. After parturition, group A showed a higher percentage of retention of fetal membranes as well as the calf mortality and dystocia compared to group B. The differences between two groups were statistically significant （P 〈 0.05）. In conclusion, our results indicate that induction of parturition by estradiol benzoate and dexamethasone together will be more effective than dexamethasone alone because of the less retention of fetal membranes, easy calving and shorter time from induction to parturition.

关键词： Dexamethasone estradiol benzoate heifer parturition retained fetal membranes.

百里香、欧芹和熏衣草水苏提取物对四纹豆象成虫的生物活性

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昆虫学报 2018年第3期61卷 331-339页

作者： Fahimeh HAMIDI Ali mehrvar Naser EIVAZIAN KARY Hassan VALIZADEH Department of Plant Protection Faculty of Agriculture Azarbaijan Shahid Madani University Po. Box. *** Tabriz Iran Department of Chemistry Facuhy of Basic Sciences Azarbaijan Shahid Madani University P. O. Box *** Tabriz Ir

【目的】植物次生代谢物对不同类害虫的影响程度如得以详细研究,则它们可能有望成为化学杀虫剂的合适替代物。本研究旨在评价溶剂极性对不同植物提取物杀虫活性的可能影响。【方法】从极性不同的化合物正己烷、乙酸乙酯和甲醇中选择提... 详细信息

【目的】植物次生代谢物对不同类害虫的影响程度如得以详细研究,则它们可能有望成为化学杀虫剂的合适替代物。本研究旨在评价溶剂极性对不同植物提取物杀虫活性的可能影响。【方法】从极性不同的化合物正己烷、乙酸乙酯和甲醇中选择提取溶剂。于28±2℃、相对湿度50%±5%、光周期16L∶8D条件下评价欧芹Petroselinum sativum种子提取物以及百里香Thymus vulgaris和熏衣草水苏Stachys lavandulifolia茎叶提取物对四纹豆象Callosobruchus maculatus成虫的致死效果,并评价其杀卵和产卵忌避效果。【结果】在对四纹豆象成虫的触杀毒性中,百里香正己烷提取物(0.05 g/m L)的LC50值最低,其次是乙酸乙酯和甲醇提取物。百里香的乙酸乙酯提取物对四纹豆象成虫的LT50值最低(10.04 h),在所有提取物中相对击倒速度指数最高(42.23%)。在对成虫的触杀毒性中,LC20和LC50浓度的所有提取物都具有100%的杀卵活性。熏衣草水苏的甲醇提取物对四纹豆象成虫具有最高的产卵忌避活性(97.54%)。【结论】本研究结果得出,百里香、欧芹和熏衣草水苏提取物对四纹豆象成虫具有明显的杀虫和杀卵毒性,并对其具有产卵忌避性。不过,非极性(正己烷)提取物的性能更佳。

关键词：四纹豆象植物源杀虫剂溶剂粗提物生物活性

Slaughterhouse Wastewater Characterization and Treatment: An Economic and Public Health Necessity of the Meat Processing Industry in Ontario, Canada

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Journal of Geoscience and Environment Protection 2016年第4期4卷 175-186页

作者： Ciro Bustillo-Lecompte Mehrab mehrvar Edgar Quiñones-Bolaños Grad Programs in Environmental Applied Science and Management Ryerson University Toronto Canada Department of Chemical Engineering Ryerson University Toronto Canada Environmental Modeling Research Group University of Cartagena Cartagena de Indias Colombia

The characteristics of the slaughterhouse effluents and current wastewater treatment practices in the province of Ontario, Canada are analyzed. Meat processing plants are found to produce large amounts of wastewater due to the slaughtering process and cleaning of their facilities. Furthermore, the composition of the wastewater varies according to the type and number of animals slaughtered and the water requirements of the process. However, the slaughterhouse wastewater usually contains high levels of organics and nutrients. Several slaughterhouses in Ontario discharge their wastewater into the municipal sewer system after primary pretreatment at the meat processing plant. Therefore, due to the high-strength characteristics of the slaughterhouse effluents, an extensive treatment for a safe discharge into the environment is required. Thus, the combination of biological processes and advanced oxidation technologies for slaughterhouse wastewater treatment is evaluated in this study. Results show that the application of combined biological and advanced oxidation processes is recommended for on-site slaughterhouse wastewater treatment.

关键词： Slaughterhouse Wastewater Anaerobic Digestion Activated Sludge Advanced Oxidation Processes