oalib

OALib Journal期刊

ISSN: 2333-9721

费用:99美元

投稿

时间不限

2017 ( 401 )

2016 ( 794 )

2015 ( 13688 )

2014 ( 17635 )

自定义范围…

匹配条件: “P.I.K. Peabotuwage” ,找到相关结果约373996条。
列表显示的所有文章,均可免费获取
第1页/共373996条
每页显示
An attempt to reduce impacts of limestone quarries through biodiversity assessment and translocation: A case study at the Holcim Limestone Quarry Site in Puttalam, Sri Lanka
A. Kumarasinghe,W.A.A.D.G. Pradeep,P.I.K. Peabotuwage,R.G.A.T.S. Wickramaarachchi
Asian Journal of Conservation Biology , 2013,
Abstract: A conservation project was implemented at a commercial limestone quarry site in Sri Lanka managed by Holcim Lanka (Pvt.) Ltd. The project intended to assess the biodiversity of a proposed excavation site and to translocate fauna that will be affected by quarry operations such as forest clearance and blasting. The biodiversity of the area was surveyed using a rapid assessment technique, prior to the initiation of forest clearance and blasting. A total of 41 floral species and 220 faunal species were recorded from the project site. Around 90 % of the fauna were amphibians, reptiles and butterflies. Among these species, one endemic tree, a theraposid spider and 20 endemic vertebrates. Among the vertebrates documented, 9 species are categorized as nationally threatened. A total of 141 vertebrates and 85 arthropods and mollusks including endemics threatened species were captured and translocated to Sethtavilluwa area. This project is the first ever initiative in Sri Lanka aimed at reducing impacts of quarry operation on biota through rehabilitation and rescue operations. Such projects are invaluable as they will, at least in part assist in safeguarding biota that will be vulnerable to local extinction as a result of developmental projects.
Adoption Levels of Improved Fisheries Technologies and Impacts of Extension Services on Fisher-Folks in Two Maritime States in Nigeria
P.I. Bolorunduro,A.O.K. Adesehinwa
Asian Journal of Information Technology , 2012,
Abstract: A study to determine the awareness and adoption levels of disseminated fisheries technologies and the impacts of extension activities among the rural fisher-folks was carried out in two Nigerian maritime states of Lagos and Rivers. Structured questionnaire was used through interviewed schedules to obtain information from respondents in two fishing villages in a local government area in each state. The fisherfolks were randomly selected and consisted of fishermen, fish processors and fish farmers. The Agricultural Development Projects (ADPs) in the states assisted in the selection of the study sites. Data collected were analyzed by simple descriptive statistics of frequencies percentages and means. Results obtained showed that about 57.5% of the fisher-folks were in the economically active age group of 31-50 years, with mean age at 38 years in Lagos and 30 years in Rivers. Female fisher-folks constituted 30.0% of the respondents. The modal house hold size for both states was 6-10 constituting 51.3% of the respondents. About 50.0% of the fisher-folks had at least secondary school education with some of them (51.3%) relatively young in the business (1-10years experience). In spite of the fact that about 60% of the respondents were members of cooperative societies, most of them (81.0%) finance their businesses with personal funds. Fisher-folks in Lagos had higher levels of awareness (76.5-85.3%) and adoption (70.6-79.4%) of aquaculture technologies than Rivers state, with awareness and adoption levels of 7.5-22.5 and 5.0-20.0%, respectively. The awareness and adoption levels of disseminated technologies in post harvest handling in capture fisheries were lower in Lagos (26.5-47.1 and 17.6-47.1%, respectively) than in Rivers state (45.0-72.5 and 25.0-50.0%, respectively). On the average, more impact was recorded in both states on better income from fishing, fish processing and quality of diet. The most constraining factors to adoption among the respondents were high cost of adoption inputs, insufficient creation of awareness, scarcity of adoption inputs and lack of technical support in adoption practices, among others. Recommended measures to promote awareness and adoption levels in the two states vis-à-vis Nigeria as a whole, include proper testing and validation of recommendations at the fisher-folks end before pushing the technologies for mass adoption, improvement of various strategies used in disseminating improved technologies and proper funding of fisheries extension activities to promote adoption and overall fisheries development.
Detergent Potential of a Spoilage Protease Enzyme Liberated by a Psychrotrophic Spore Former Isolated from Sterilized Skim Milk
A.K. Beena,P.I. Geevarghese,K.K. Jayavardanan
American Journal of Food Technology , 2012,
Abstract: The organism isolated from sterilized skim milk was identified as Bacillus cereus. B. cereus was found to be capable of producing protease enzyme at an alkaline pH-10. To assess the possibility of exploiting this enzyme in cleaning formulations, temperature stability, pH stability and compatibility of crude enzyme with detergent components were looked into. The enzyme was found to be stable over a pH ranging from 7-12 with maximum activity at pH-11.0. The protease retained more than 60% activity after 90 min of exposure to all the selected temperatures of 20, 40, 60 and 80C. Residual activity of enzyme after forty days of storage at 10 and -10C was 77.4 and 69.5% of their initial activity, respectively. Enzyme remained stable to a very wide temperature range of -10 to 80C. The anionic surfactant Sodium dodecyl sulphate enhanced the activity by 2.2 times under experimental conditions. Nonionic surfactant Tween 80 also improved the activity of protease enzyme. Hydrogen peroxide, a commonly used bleaching agent was found to have no significant adverse affect on the crude enzyme. Detergent compatibility of the enzyme was distinctly established by the wash test also. The results of this experiment confirmed the potential of enzyme to be used as a detergent additive.
Chloroquine prophylaxis associated with high prevalence of Plasmodium falciparum Pfcrt K76T mutation in people with sickle-cell disease in Benin City, Nigeria
Y.M. Tatfeng,D.E. Agbonlahor,K.S. Tchounga,P.I. Omolu
Journal of Vector Borne Diseases , 2008,
Abstract: Background & objectives: High mortality and morbidity in sickle-cell disease has been associated with malaria infection especially in countries where chloroquine is used. Chloroquine resistance has been associated with the emergence of Pfcrt mutant genes. This study aimed at comparing the prevalence rate of Pfcrt T76 mutation in Plasmodium falciparum isolates from infected individuals with sickle-cell disease and sickle-cell trait. This study was carried out in Benin City between the months of April and June 2006. This period is marked with high transmission rate of malaria. Methods: The genotype of the subjects was screened using haemoglobin electrophoresis system and the P. falciparum. Pfcrt genotyping was carried out using PCR–restriction fragment length polymorphism (RFLP).Results: Four hundred and twenty-four subjects comprising of 207 haemoglobin AA, 136 haemoglobin AS and 81 haemoglobin SS typed individuals were enrolled for this study. No significant difference existed in the prevalence rate of malaria in the three groups (p >0.05). However, the prevalence rate of Pfcrt K76T mutant gene was higher in the haemoglobin SS genotyped individuals than the haemoglobin AA and AS subjects (p<0.05).Interpretation & conclusion: An uncontrolled use of chloroquine has been incriminated as the major cause of chloroquine resistance in Nigeria. Therefore, rapid intervention measures are needed as a matter of urgency to curb the up rise in the prevalence of the chloroquine resistant genes in our environment.
Optimum NPK Fertilizers Rates Based on Soil Data for Grain Maize (Zea mays L) Production in Some Soils of Southeastern Nigeria
P.I. Ezeaku
Agricultural Journal , 2013,
Abstract: Grain yield of hybrid maize (Oba-2 super) and a popular open-pollinated (O.P) local variety were studied over 3 years (1996-1998) in three selectd locations-Nsukka, Awgu and Abakaliki, all of which belong to derived savanna agro ecological zone of Nigeria. Under a factorial arrangement fitted into a RCB and with four replicates, the cultivars were treated to 5 levels of fertilizer NPK derived from soil analytical data. The levels were F0, F1, F2, F3 and F4 caluclated and applied according to crop need in each location. An optimum rate (F3) of 493, 566 and 540 kg ha 1 mixed NPK fertilizers was established at Nsukka, Awgu and Abakaliki, respectively, for maize cultivation. Each of the rates was location specific. They are, however, 1.5 times the agronomically recommended rate of 300 kg ha 1 in the general area. The results showed that average grain yields of 311.5, 3371.5 and 338.2 kg ha 1 were, respectively, obtained at Nsukka during 1996, 1997 and 1998 cropping seasons. At Awgu, the average yields obtained at the same periods included 4033.1, 4576.4, 4123.1 kg ha 1, while Abakaliki had 4309.8, 3766.5, 3834.8 kg ha 1. Grain yield response to the mixed NPK fertilizer was higher at F3 rate while higher grain yields were obtained by the cultivation of hybrid in preference to O.P. From the study, it was concluded that for rainfed maize cultivation such as is the case in the study, adequate dosage of fertilizers based on soil and analytical data is attainable and thus, one doze application of F3 rate is recommended for optimum performance of maize.
Efficiency and safety of androgenic therapies of hypogonadism at patients with considerably eliminated urolithiasis
P.I. Shuster
Saratov Journal of Medical Scientific Research , 2009,
Abstract: The weakest unit in treatment of urolithiasis is revealing in each specific case etiological factor of lithogenic and carrying out etiotropic therapy, and, hence prevention of urolithiasis relapse. The study of correlation of hypogonadism through osteosinging with urolithiasis at men is the new perspective direction uniting Endocrinology and somatic Urology. In prospective cohort research the patients divided into 2 groups have been included: basic group - patients with considerably cured urolithiasis and hypogonadism, received androgenic therapy (30 persons); comparison group -patients with considerably cured urolithiasis and hypogonadism, not receiving androgen therapy (30 persons). Used: questioning on questionnaire AMS, the International index of erectile functions (IIEF-5), index of weight of a body, haemoglobin, hematocrit, biochemical indicators of blood serum, densitometry, general testosterone, PSA, and ionized calcium. After contra-indications exception (cancer of prostate gland, expressed increase of haemoglobin and hematocrit) the basic group patients were prescribed one of testosterone group drug during the period not less than 6 months: Androgel (Solvay Pharma), Nebido (Bayer Schering Pharma), Sustanon-250 (Organon), Omnadren-250 (Polfa). At the moment of the therapy beginning, patients of both groups were comparable in all investigated indices. Relapse of urolithiasis: against androgenic therapy - 28,6%, in comparison group - 63,2%. The obtained data testify to efficiency of androgenic therapy in respect to prevention of urolithiasis at patients with hypogonadism and confirm the role of hypogonadism as one of etiopathogenetic development factors of urolithiasis. Androgenic therapy was safe. All patients had insignificant increase of general PSA level and statistically significant increase of haemoglobin and hematocrit indicators. However, the received changes did not demand cancellation, or therapy correction.
A case of familial amyloid polyneuropathy type I of Greek origin
P.I. Rafailidis, S.P. Dourakis, I.S. Papanikolaou, P. Cherakakis, N. Matikas, J.K. Triantafillidis
Annals of Gastroenterology , 2007,
Abstract: SUMMARY Familial amyloid polyneuropathy is a rare hereditary disease. We present the case of a thirty-seven-year-old woman with sensorimotor neuropathy, which started five years ago accompanied by diarrhoea, urine incontinence and orthostatic hypotension during the last two years. This clinical constellation resulted in burns of the upper and lower limbs, walking disturbance and a loss of weight of ten kilograms. The patient s mother had a history of sensory neuropathy, heart failure and gastrointestinal problems and died at the age of forty. Our patient underwent a sural nerve biopsy, which showed amyloid deposits. A blood sample analysed further by polyacrylamide gel electrophoresis followed by isoelectric focusing revealed that our patient had a normal transthyretin band although present in decreased concentration and an extra band indistinguishable from the mutant transthyretin (Val30Met). Subsequent extraction of DNA, amplification of exon 2 and restriction by Nsi I confirmed our patient s heterozygosity for the amyloidogenic mutant transthyretin. We referred our patient for liver transplantation, the only available therapeutic modality to date known to halt the inexorable progression of the disease.
COMPARATIVE ANALYSIS OF OXALIC ACID PRODUCED FROM RICE HUSK AND PADDY
P.I. Oghome,K.O.Amanze,C.I.O.Kamalu,A.C Nkwocha
International Journal of Engineering Science and Technology , 2012,
Abstract: In this research work, comparative analysis of Oxalic acid produced from Rice husk and Paddy was carried out in order to ascertain which waste sample produced a better yield. Nitric acid oxidation of carbohydrates was the method adopted in the production. The variable ratios of HNO3:H2SO4 used were 80:20, 70:30, 60:40, and 50:50. The variable ratio of 60:40 gave the maximum yield and at a maximum temperature of 75oC. Rice husk sample gave a percentage yield of 53.2, 64.4, 81.0, and 53.3 at temperatures of 55 oC, 65 oC, 75 oC, and 85 oC respectively. In the case of paddy a percentage yield of 53.1, 64.0, 79.9, and 52.8 at temperatures of 55 oC, 65 oC, 75 oC, and 85 oC were obtained respectively. The plots between yield and temperature at different variable ratios illustrate the dependence of yield on temperature, which was similar to a parabolic relationship and the peak value (yield) was at 75 oC above which it decreased. The properties of oxalic acid from both sources were very close and compared favourably with literature. In comparing the yield, oxalic acid produced from Rice husk gave higher yield than that from Paddy.
Volcanic and Geothermal Gases and Low-enthalpy Natural Manifestations Methods of Sampling and Analysis by Gas Chromatography
P.I. Antonio Caprai
Journal of Applied Sciences , 2005,
Abstract: Chemical analyses of volcanic, geothermal and low enthalpy fluids are carried on to investigate volatile evolution. The methods used are mainly two: collection of residual gases and total gases. Both are valid, but for different use. In residual gases one can analyze ratio gas/steam, minus and major components but no carbon monoxide because interference with sodium idroxide. In total gas is difficult to analyze minus components but it`s good for carbon monoxide and isotopic composition in carbon dioxide. In both sampling methods the problem is to choose a good way for sampling. This manual shows the methods we consider the best in use. Another problems is to minimize analytical error. It depends from the quality of instrumentation and the quality of methods we use. We describe the methods in use in IGG laboratories that give good results, according with quality of instrumentation, quality of standard and reproducibility. We think that may exist other valid methods to collect and analyze samples. The methods we describe are just a starting point, it depends on the ability of researchers and operators to find methods valid for particular sites. In addition are described preparation of bottles for sampling different kinds of natural manifestations. There are different preparations in residual flasks if we sample volcanic fumaroles or geothermal wells. In addition to this some problems can comes from the pressure inside the bottles. We solve the problem with a particular apparatus self made for working at very low pressure, even under one hundred mbar.
Green ear yield and grain yield of maize cultivars in competition with weeds
Silva, P.S.L.;Silva, K.M.B.;Silva, P.I.B.;Oliveira, V.R.;Ferreira, J.L.B.;
Planta Daninha , 2010, DOI: 10.1590/S0100-83582010000100010
Abstract: the reduction in herbicide use is one of the greatest interests for modern agriculture and several alternatives are being investigated with this objective, including the adoption of cultivars that suppress weeds. the objective of this study was to verify if maize cultivars develop differently, in competition with weeds, to produce green ears and grain. randomized complete block design was used, with split-plots and five replications. cultivars dkb 390, dkb 466, dkb 350, ag 7000, ag 7575 and master, were evaluated in the plots, without weeding and two weedings (at 22 and 41 days after sowing) in sub plots. twenty-one species were identified in the experimental area, the most frequent being gramineae (poaceae), euphorbiaceae, leguminosae (fabaceae) and convolvulaceae species. there was no difference in the dry biomass above-ground part of the weeds in the plots of the evaluated cultivars. the cultivars behaved similarly in treatments with or without hoeing, except for plant height and ear height evaluations. without hoeing, plant height increased in cultivar dkb 390, while plant height and ear height decreased in cultivar ag 7575. in the other cultivars, these traits did not change under weed control. the presence of weeds decreased the values of all traits employed to assess green corn yield, with the exception of the total number of green ears and grain yield.
第1页/共373996条
每页显示


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.