Effect of pH on Removal of Cu,Cd, Zn,and Ni by Cement Kiln Dust in Aqueous Solution     

Abu El-Eyuoon Abu Zied Amin  Salman A. H. Selmy 《Communications in Soil Science and Plant Analysis》2017,48(11):1301-1308

A batch experiment was conducted to study the effect of pH on the sorption of copper (Cu), cadmium (Cd), zinc (Zn), and nickel (Ni) by cement kiln dust (CKD). The experiment was carried out by adding 25 mL of solutions containing concentrations of 200, 400, 600, 800, and 1000 mg/L of each of these heavy metal cations to 1.00 g of CKD. The pH of these suspensions was adjusted to 2, 5, and 7 as well as non-adjusted. The sorbed amount (Cs) and the sorption percentage of Cu, Cd, Zn, and Ni by CKD increased with increasing the suspension pH. The adsorption data of Cu, Cd, Zn, and Ni were generally well correlated with Langmuir model when the suspension pH was adjusted to 5, 7, non-adjusted and 7, respectively. However, they could be well described by Freundlich model when the suspension pH was adjusted to 5, 2, non-adjusted and 5, respectively.  相似文献   

Forest structure and carbon dynamics of an intact lowland mixed dipterocarp forest in Brunei Darussalam   总被引：1，自引：0，他引：1  

Sohye Lee  Jongyeol Lee  Seongjun Kim  Yujin Roh  Kamariah Abu Salim  Woo-Kyun Lee  Yowhan Son 《林业研究》2018,29(1):199-203

Tropical forests play a critical role in mitigating climate change because they account for large amount o terrestrial carbon storage and productivity.However,there are many uncertainties associated with the estimation o carbon dynamics.We estimated forest structure and carbon dynamics along a slope(17.3°–42.8°)and to assess the relations between forest structures,carbon dynamics,and slopes in an intact lowland mixed dipterocarp forest,in Kuala Belalong,Brunei Darussalam.Living biomass,basa area,stand density,crown properties,and tree family composition were measured for forest structure.Growth rate,litter production,and litter decomposition rates were also measured for carbon dynamics.The crown form index and the crown position index were used to assess crown properties,which we categorized into five stages,from very poor to perfect.The living biomass,basal area and stand density were 261.5–940.7 Mg ha~(-1),43.6–63.6 m~2ha~(-1)and 6,675–8400 tree ha~(-1),respectively.The average crown form and position index were 4,which means that the crown are mostly symmetrical and sufficiently exposed for photosynthesis.The mean biomass growth rate,litter production,litter decomposition rate were estimated as11.9,11.6 Mg ha~(-1)a~(-1),and 7.2 g a~(-1),respectively.Biomass growth rate was significantly correlated with living biomass,basal area,and crown form.Crown form appeared to strongly influence living biomass,basal area and biomass growth rate in terms of light acquisition.However,basal area,stand density,crown properties,and biomass growth rate did not vary by slope or tree family composition.The results indicate that carbon accumulation by tree growth in an intact lowland mixed dipterocarp forest depends on crown properties.Absence of any effect of tree family composition on carbon accumulation suggests that the main driver of biomass accumulation in old-growth forests of Borneo is not species-specific characteristics of tree species.  相似文献   

Isolation of Brucella abortus from experimentally infected dromedary camels in Sudan: A preliminary report     

H. Abu Damir  M. H. Tageldin  S. J. Kenyon  O. F. Idris 《Veterinary research communications》1989,13(6):403-406

Six camels were experimentally infected with two strains of Brucella abortus, four with S19 and two with a field bovine strain. In all cases antibody titres were detected within 6 to 11 days. Serum agglutination titres peaked between days 11 and 32 and complement fixation titres between days 11 and 52; both titres then declined steadily. No clinical signs were observed in the four camels inoculated with S19. Slight non-specific symptoms were seen in the two camels infected with the field bovine strain. On post mortem examination no gross lesions were observed although histopathological sections showed focal granulomata in the liver and a generalized lymphadenitis. The organism was recovered mainly from the lymph nodes of the head and genital tract.  相似文献   

Bluetongue in camels: a serological survey of the one-humped camel (Camelus dromedarius) in the Sudan     

E M Abu Elzein 《Revue d'élevage et de médecine vétérinaire des pays tropicaux》1985,38(4):438-442

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Prevalence and risk factors of Avian Influenza Viruses among household ducks in Chattogram,Bangladesh     

Rahman  Md. Ashiqur  Belgrad  Joseph P.  Sayeed  Md. Abu  Abdullah  Md. Sadeque  Barua  Shanta  Chisty  Nurun Nahar  Mohsin  Md. Abu Shoieb  Foysal  Mohammad  Hossain  Mohammad Enayet  Islam  Ariful  Akwar  Holy  Hoque  Md Ahasanul 《Veterinary research communications》2022,46(2):471-480

Veterinary Research Communications - Avian influenza viruses (AIV) increase commercial and backyard poultry mortality and morbidity, reduces egg production, and elevates public health risk....  相似文献   

Biologie und Bekämpfung der SpinnmilbeTetranychus telarius L. auf Aubergine (Eierfrüchten)     

Ibrahim Abu Yaman 《Journal of pest science》1965,38(5):65-69

Zusammenfassung 1. Die Spinnmilbenpopulation war von Anfang Oktober bis Anfang Ende Januar gering. Während dieser Zeit haben sie das Wachstum und Produktion der Pflanzen nicht sonderlich beeinflußt. Danach stieg ihre Zahl schlagartig und rief Schaden unter den Aubergine-Pflanzen hervor.2. Wir halten die Temperatur für den Hauptfaktor für den Anstieg und Abfall der Spinnmilbenpopulation. Niederschläge haben geringen Einfluß.3. Die Spinnmilben werden bereits bei Temperaturen von 13,4–15°C aktiv. Die Aktivität nimmt mit dem Temperaturanstieg zu und die Milbenzahl erreicht einen Gipfel bei etwa 21°C. Weiter ansteigende Temperatur bewirkt einen Abfall der Anzahl.4. Im Sommer werden keine Spinnmilben gefunden.5. Bei leichtem Befall werden die Spinnmilben an den unteren Blatteilen gefunden, bei schwerem Befall aber auch an der oberen Blattoberfläche.6. Kelthane und Tedion sind die besten Bekämpfungsmittel gegen die Spinnmilbe.7. Organische Phosphorverbindungen ermöglichen einen Anstieg der Spinnmilbenpopulation, wahrscheinlich durch das Abtöten ihrer natürlichen Feinde, und die Milben werden resistent gegen ihre Wirkung.

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Conclusion 1. Spider mite populations were very small at the beginning of October and until the end of January. During that time they had no harmful effect on plant growth and production. After that date their numbers increased strikingly and caused damage to the eggplants.2. We consider temperature as the major factor influencing the increase and decrease in spider mite populations. Precipitation has little effect.3. Spider mites become active and reproduce already at mean temperatures of 13,4–15°C. The activity increases with the increase in temperature and the numbers reached the peak at mean temperature of 21°C. Further increase in temperature caused the decrease in numbers.4. Spider mites are not found in summer.5. Spider mite is found on the lower surface of the leaf when infestation is light, but also on the upper surface when infestation is severe.6. Kelthane and Tedion give the best control of the spider mite.7. The organo-phosphorous compounds allow increase of spider mite populations, probably by killing its natural enemies, and the mites developing resistance against their effect.

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Der Schreiber möchte Seiner Excellenz, dem Minister für Landwirtschaft, für sein besonderes Interesse und seine Ermutigung Dank sagen; ebenso dem herrn Direktor der wissenschaftlichen Abteilung für das Bereitstellen aller während der Untersuchungen benötigten Einrichtungen. Besonderer Dank gebührt Herrn A. Arafat für das Sammeln der Daten.Dank möchte ich auch dem Superintendenten der Fara'a Versuchs-Station sagen, welcher mir das Material, Geräte und Labor zur Verfügung stellte, und allen Mitarbeitern, die niemals ihre Hilfe versagten, wenn sie darum gebeten wurden.  相似文献   

Analysing the land uses of forest-dwelling indigenous people in the Chittagong Hill Tracts,Bangladesh     

Abu Saleh Md. Golam Kibria  Makoto Inoue  Tapan Kumar Nath 《Agroforestry Systems》2015,89(4):663-676

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Seroprevalence of toxoplasmosis in sheep in South Africa     

Samra NA  McCrindle CM  Penzhorn BL  Cenci-Goga B 《Journal of the South African Veterinary Association》2007,78(3):116-120

Serum samples from 600 sheep were collected from 5 different provinces randomly chosen in South Africa. Two sheep abattoirs (representing formal slaughter of sheep) and 1 rural location (representing informal slaughter of sheep) per province were also selected randomly. The serum samples were tested for anti-Toxoplasma gondii IgG antibodies using 2 different serological tests: an indirect fluorescent antibody (IFA) test and an enzyme-linked immunosorbent assay (ELISA) test available as a commercial kit. This study provides the first published data on seroprevalence of toxoplasmosis in sheep in South Africa, although positive titres have been found previously in wild felids, ferrets, chinchillas and a dog. Data on seroprevalence in sheep is considered important because consumption of mutton is universally considered to be a source of zoonotic transfer to humans. Seroprevalence in humans in South Africa was previously found to be 20 % and it is postulated that this may be linked to the informal slaughter and consumption of mutton. During this study, the overall national seroprevalence per province in sheep was found to be 5.6 % (IFA) and 4.3 % (ELISA), respectively. This is lower than in other countries, possibly because South Africa has an arid climate. Differences in seroprevalence in different areas studied suggested an association with the climate and a significant correlation (P > 0.05) was detected between the prevalence of T. gondii and the minimum average temperature. The seroprevalence was found to be significantly higher (P < 0.01) in sheep originating from commercial farms (7.9 %) than in rural sheep in the informal sector (3.4 %). Also, sheep managed extensively had a seroprevalence of 1.8 %, which was significantly lower (P < 0.05) than the seroprevalence in sheep under semi-intensive or intensive management systems (5.3%). An incidental finding of interest was the considerable movement of sheep to abattoirs and mutton after slaughter. The highest consumption of mutton was in the Western Cape Province (29.9%) while the highest concentration of sheep is found in the Eastern Cape Province (30.1%).  相似文献   

Evaluation of Osteogenic Potentials of Avian Demineralized Bone Matrix in the Healing of Osseous Defects in Pigeons          下载免费PDF全文

Reza Sanaei DVM  MVSc  Jalila Abu DVM  MS  PhD  Mojgan Nazari DVM  MVSc  Mohd A. B. Zuki DVM  PhD  Zeenathul N. Allaudin DVM  MS  PhD 《Veterinary surgery : VS》2015,44(5):603-612

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EFFECTS OF A MULTISTRAIN BIOFERTILIZER AND PHOSPHORUS RATES ON NUTRITION AND GRAIN YIELD OF PADDY RICE ON A SANDY SOIL IN SOUTHERN VIETNAM     

Phan Thi Cong  Tran Dang Dung  Nguyen Thanh Hien  Abu T. M. A. Choudhury  Michael T. Rose  Mihály L. Kecskés 《Journal of plant nutrition》2013,36(7):1058-1069

Field experiments during two successive rainy seasons were conducted in southern Vietnam to evaluate the effects of a commercial inoculant biofertilizer (‘BioGro’) and fused magnesium phosphate (FMP) fertilizer on yield and nitrogen (N) and phosphorus (P) nutrition of rice. Inoculation with BioGro containing a pseudomonad, two bacilli and a soil yeast significantly increased grain yield in the second season and straw yield in both seasons by 3–5%. The FMP fertilizer significantly increased grain yield from 1.72–2.33 t ha^?1 to 2.99–3.58 t ha^?1 along with total N and P accumulation at all rates in both cropping seasons. In the first season the difference in grain yield between BioGro treated and untreated plots was marginal but in the second season BioGro out-yielded the control at all the rates of added P. Overall, BioGro application did not compensate for low P fertilizer application to the same extent previously demonstrated for low N fertilizer applications.  相似文献