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Haematological and blood biochemical changes were studied in nine camels after maximal exercise over 4 or 5 km. There was a lack of splenic reserve for red blood cells, indicated by a minimal increase in haemoglobin concentration and haematocrit. There were marked increases in plasma lactate (to over 20 mmol/litre), plasma ammonia and plasma glucose and a pronounced decrease in circulating free fatty acids. There were small but significant increases in plasma calcium, magnesium, sodium, potassium, chloride and phosphate concentrations. 相似文献
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Hadi D. A. Billah M. Biswas K. F. Rafiqul Islam 《Water, air, and soil pollution》1999,111(1-4):377-384
Precipitation was collected on an event basis from July 1994 to August 1995 at towns around the capital Dhaka of Bangladesh. The major chemical components were determined by atomic absorption spectrophotometry, UV-Visible spectrophotometry and ion selective electrode method. The concentrations of nitrate and sulphate were found to be below the minimum detection limit of 1.0 mg L- 1; the concentrations of Cl-, Na+, K+, Ca+2, Mg+2 and NH4+ ranged from <1.0–3.03, 0.14–1.70, 0.04–0.37, 0.04–1.30, <0.02–0.20 and <0.10–2.33 mg L-1, respectively. The values of pH and conductivity ranged from 4.80–6.74 and 3.3–37.5 μS cm-1, respectively. 相似文献
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A specifically-synthesized water-soluble photochromic acid dye has been applied by screen printing on to silk, wool and nylon.
The influence of processing parameters and the nature of the substrate on the photochromic response of the printed materials
has been evaluated using specifically-developed colour measurement methodology. The printed substrates show photochromic colour
change from weakly coloured to an intense blue colour under sunlight or UV irradiation. In most cases, the photochromic colour
build up is higher on wet substrates than after drying. Computer aided molecular modelling techniques have been used to explain
aspects of the photochromic behaviour. 相似文献
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Baseline studies were conducted to determine the parasitoids associated with fruit flies in the northern savanna ecology of Ghana. Fruit fly puparia obtained from incubation of 17 host fruit species were maintained in rearing cages for the emergence of parasitoid wasps. Four species of braconid parasitoids namely, Fopius caudatus (Szépligeti), Psyttalia cosyrae (Wilkinson), Psyttalia concolor (Szépligeti) and Diachasmimorpha fullawayi (Silvestri) were recovered. F. caudatus was the most abundant parasitoid (61.0%) reared from most host fruits while D. fullawayi was the least abundant (7.7%). The overall mean parasitism rate was 7.1% with the highest record in Annona senegalensis Pers., Sarcocepholus latifolium S. Bruce and Icacina senegalensis Juss. Ceratitis cosyra and Bactrocera invadens were the fruit fly species most commonly reared that produced F. caudatus, and to a lesser extent, P. cosyrae. The peak occurrence of the parasitoids coincided with the peak of the rains and the maturity period of many of the host fruits. This first inventory of tephritid parasitoids in Ghana provides critical baseline data for biological control efforts in the future. 相似文献
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U Wernery H S Seifert A M Billah M Ali 《Revue d'élevage et de médecine vétérinaire des pays tropicaux》1991,44(2):147-152
C. perfringens type A was isolated from different organs and intestines from breeding and racing camels which died from peracute and acute enterotoxemias in two separate outbreaks. Pathological changes in the digestive tract were mild in breeding camels, and severe in racing camels. A polyvalent clostridial antiserum of bovine origin given intravenously had a life-saving effect on breeding camels, but not on racing camels. In the two outbreaks, fifty percent of the breeding camels were suffering from an acute Trypanosoma evansi infection, and 25% of the racing camels had developed a salmonellosis. It is suggested that both infections played an important role as predisposing factors for the outbreak of C. perfringens enterotoxemias. 相似文献
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AbstractBiochar has attained significant attention as a beneficial soil amendment amongst growers and researchers. However, the impact of particle size of biochar is yet to be investigated. Here in the present study, we studied three particle sizes (<2?mm, 2–5?mm, and >5?mm) of biochar and two rhizobia strains (Rhizobium leguminoserum (RL) and Rhizogold (RG)) for their effect on the uptake and efficiency of nitrogen (N) in lentils. The two years experiment followed a randomized complete block design with split plot arrangement replicated three times. The data revealed that grain N, straw N, N uptake, N recovery efficiency (NRE), and N agronomic efficiency (NAE) were maximum with biochar smallest size (<2?mm). However, the N physiological efficiency, number of branches and plant height decreased with reduced particle size. Furthermore, the smallest particle size showed more number of pod plant?1. Biofertilizer strain (RL and RG) significantly increased the straw N but not the grain N. Both strains showed increased NRE and NAE, however, the RL demonstrated 7% more grain N than the RG. Both strains (RL and RG) demonstrated 16% and 20% increase in number of branches plant?1, 62% and 48% in plant height and 2% and 5% in root length, respectively. The RL strain improved the number of branches plant?1 at the lowest (<2?mm) and medium size (2–5?mm) particles size but both RL and RG strains demonstrated increased plant height under the maximum particle size. These results indicated that a mere increase in surface area with decreasing biochar particle size may not serve for enhancing biofertilizer strains performance since reducing particle size may immobilize the starter N applied. However, reducing particle size effect on N cycling into soil plant system was favorable. 相似文献
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Artificial insemination (AI) is one of the most widely used reproductive technologies, and there is considerably interest in commercializing this technology in camels. Storage of semen extender frozen (at -20 °C) is of considerable interest to scientists working with camels, as transportation of diluents at refrigeration temperature is not always possible given the hot, arid and remote conditions that dromedary camels exist in. Therefore, this study was conducted to compare the fertility of fresh camel semen, after dilution in fresh or frozen-thawed green buffer (GB), after AI into single and multiple ovulating female camels. No differences were observed in any sperm characteristics (motility, membrane integrity, acrosome integrity or morphology) when semen was diluted in fresh or frozen-thawed GB (p>0.05). Sperm motility was increased by dilution (fresh: 70.7 ± 4.9% and frozen: 68.8 ± 3.1%) compared with the motility of sperm in neat semen (35 ± 2.85%; p<0.05), and sperm motility changed from oscillatory to forward progressive after dilution. Pregnancy rates were higher (p<0.05) for single ovulating camels inseminated with semen diluted in fresh (72.7%) compared with frozen-thawed GB (27.3%), and fertilization rates were also higher (p<0.05) for multiple ovulating camels inseminated with semen diluted in fresh (83.3%) compared with frozen-thawed GB (11.1%). These results clearly demonstrate the detrimental effect of freezing and thawing semen diluent on the fertility of fresh camel semen. However, further studies are required to elucidate the mechanism responsible for this reduction in fertility. Moreover, these results demonstrate that the fertility of fresh camel semen diluted in fresh GB is high enough to be considered commercially viable. 相似文献
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Md. Khurshid Alam Bhuiyan Sabrina Qureshi Md. Masum Billah Suresh Varma Kammella Md. Rushna Alam Sunuram Ray Md. Mostafa Monwar Abu Hena M. K. 《Water, air, and soil pollution》2018,229(1):14
Recently, Sancti Petri channel on the southwestern (SW) part of Iberian Peninsula has been experiencing urban, industrial, and vehicular expansion. Until recently, there have been only few published reports documenting the pattern of metal accumulation in this estuarine sediment. In the present study, trace metals such as Cu, Zn, Ni, Mn, Pb, Co, Cd, As, and Hg concentrations were analyzed from 69 sediment samples collected from 23 sampling sites of the Santi Petri channel. The magnitude of trace metal accumulation found as the following trend: Mn > Zn > Cu > Pb > Ni > Co > As > Cd > Hg. Spatial distribution pattern demonstrated overall decreasing trend of trace metal from Cadiz Bay mouth to the open ocean mouth, clearly correlative to the presence of anthropogenic inputs. Results of the principle component analysis (PCA) revealed that sediment metal chemistry of Sancti Petri channel is mainly regulated by the concentrations of Pb, Cu, Zn, and Ni; possible sources of those were from vehicular-related emissions. Pollution load index (PLI) and geo-accumulation index (I geo ) indicated overall low values. The study will stimulate improvement of our understanding regarding the pattern of accumulation of metals in the coastal sediments, and the recorded values of metals in the present study can be used as suitable reference for future studies. 相似文献
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