oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2020 ( 64 )

2019 ( 267 )

2018 ( 325 )

2017 ( 308 )

Custom range...

Search Results: 1 - 10 of 233313 matches for " C.U. Nwachukwu "
All listed articles are free for downloading (OA Articles)
Page 1 /233313
Display every page Item
Morphological Features in Some Sp. of Indigofera L. Leguminosae-Papilionoideae
C.U. Nwachukwu,F.N. Mbagwu
Journal of Fisheries International , 2012,
Abstract: Studies on the morphological (vegetative and flora)l features in I. hirsuta, I. paniculata, I. prieureana, I. pulchra, I. senegalensis, I. stenophylla, I. terminalis and I. tinctoria were conducted. This was with the main aim of ascertaining the taxonomic importance of morphological features in determining interspecific relationships among these taxa. The morphological studied of these taxa showed distinct characteristics that can be used for taxonomic decision. Taxonomically significant characters among the taxa studies include the variation in habit-herbs in I. hirsuta, I. prieureana, I. senegalensis and I. stenophylla, while shrub in I. paniculata, I. pulchra, I. terminalis and I. tinctoria. Similarly stem colour among the taxa varies from grey in I. pulchra and I. senegalensis to dark brown in I. hirsuta, I. paniculata, I. prieureana, I. stenophylla, I. terminalis and I. tinctoria while the nature of the bark reveal smooth in I. prieureana, I. stenophylla and I. terminalis, rough in I. senegalensis while it is twiggy and pubescent in I. paniculata and I. hirsuta. The interspecific affinity that characterized I. prieureana, I. paniculata and I. stenophylla showed that these species could be phylogenetically related. The biosystematic implications of this finding have been discussed in the light of the current literature.
Leaf Anatomy of Eight Species of Indigofera L.
C.U. Nwachukwu,F.N. Mbagwu
Agricultural Journal , 2013,
Abstract: Leaf anatomy of eight species of Indigofera of the tribe Galegeae was studied from Eastern Nigeria with the aid of light microscope. This is with a view of establishing taxonomic relationships among the species. Results from the investigation show that variation in leaf anatomical attributes were so obvious that they could be added to other taxanomic information and used in an attempt to determine the taxanomic importance of leaf anatomy. Taxonomically significant characters among the taxa investigated include the variation in shape of the epidermal cells-mostly rectangular and sinuous in I. pulchra, I. senegelensis and I. stenophylla while it varies from pentagonal in I. paniculata, I. prieureana and I. terminalis through hexagonal in I. hirusta and I. ticntoria. Other anatomical characters of the leaf epidermis that exhibit variation include number of palisade layer: 1-2 layers in I. pulchra, I. senegalensis and I. stenophylla to 4-5 layers in I. prieureana and I. tintoria, nature of epidermal cells: tubular in I. hirsuta, I. prieureana and I. senegelensis straight in I. paniculata and I. tinctoria while it is wavy in I. stenophylla and I. terminalis. Type of crystal present in the leaf epidermis is also variable among the taxa: raphides in I. paniculata and I. tinctoria but tanninferous bags in I. senegelensis. The biosystematic implications of these findings have been discussed in the light of current literature.
Anatomical Studies on the Petiole of Some Species of Indigofera
Nwachukwu C.U,F.N. Mbagwu
Agricultural Journal , 2013,
Abstract: Anatomical studies on the petiole of eight indigofera species of the tribe galegeae common in eastern Nigeria were carried out with the aid of a light microscope. An analysis of the features of the internal arrangement of the petiole shows that these taxa possess vital characters that could be used in their description with a view of establishing taxonomic relationship among the species. The epidermal layer and collenchyma cells as well as crystal types are some of the characters assessed and discussed among the indigofera species investigated. The presence of uniseriate, tubular and closely parked epidermal cells in I. paniculata, I. stenophylla and I. terminalis is of taxonomic. The well-developed large distinct angular and lacuna collenchyma cells in I. prieureana, I. senegalensis and I. tinctoria are significant. Furthermore, the presences of variously shaped crystals and tannins in most of the species studied conforms the highly tanninferous nature of these taxa and hence the mechanical and storage roles of these crystal and tannins in plants.
Palynomorphology of Some Species of Indigofera L.
C.U. Nwachukwu,H.O. Edeoga
Pakistan Journal of Biological Sciences , 2006,
Abstract: Palynomorphology of eight species of Indigofera of the tribe Galegeae from Nigeria was investigated with the aid of light microscope. Results from this investigation revealed that these plants were characterised by different pollen grains whose structure differ markedly. The variations in the grains were so obvious that they could be added to other taxonomic information and used in an attempt to determine the relevance of palynomorphology in resolving the confusion in the nomenclature of these taxa. The monoporate, tricolpate and polyporate pollen grain aperture of the eight species of Indigofera are being documented for the first time in these taxa. Similarly the pollen grain shape: circular (round) in I. paniculata, I. stenophylla, I. tinctoria and I. senegalensis, elliptic in I. hirsuta and oval in I. terminalis I. pulchra and I. prieureana are equally distinct and significant in the characterization of these taxa.
Tannins, Starch Grains and Crystals in Some Species of Indigofera L. (Leguminosae-Papilionoideae)
C.U. Nwachukwu,H.O. Edeoga
International Journal of Botany , 2006,
Abstract: Studies on tannins, starch grains and crystal types in the vegetative organs of eight species of Indigofera were carried out using a microscope. This is with the aim of evaluating their reliability as aids in the systematic identification of these species. Results obtained showed that majority of these species (I. paniculata, I. prieureana, I. pulchra, I. senegalensis, I. stenophylla and I. tinctoria) were found to contain tannins, crystals and other ergastic substances in the various vegetative organs, however the type and distributions of these phytochemical substances are varied in these species. The presence of tannins, crystal sand and starch grains in the leaves and nodes of I. prieureana and I. stenophylla separates these species from the other species studied. The presence of tanninferous bags (uniformly distributed) on the palisade mesophyll and the ground tissue of I. senegalensis and I. pulchra are remarkable and equally diagnostic. The significance of these finding remains an area of further investigation as far as the chemical constituents of these species are concerned.
Incidence Cases of HIV/AIDS Infection in Owerri West Local Government Area of Imo State, Nigeria
B.C. Ijioma,I.G. Kalu,C.U. Nwachukwu,I.G. Nwachukwu
Research Journal of Biological Sciences , 2012, DOI: 10.3923/rjbsci.2010.304.309
Abstract: A study was conducted to determine the incidence cases of HIV/AIDS infection in Owerri West L.G.A. of Imo State, Nigeria, between Apirl 2007 and September, 2009. Data was collected from the HIV/AIDS co-ordination and control unit, Owerri General Hospital Umuguma, Owerri West Local Government Area of Imo State, Nigeria. It was observed that a total number of 17964 patients made up of 1110 (16.3%) females and 6954 (38.7%) males were diagonized on HIV/AIDS infection statistical analysis shows that only 1462 (8.1%) patients were infected with HIV/AIDS. From this number, 1218 (83.3%) patients aged 25 years and above were most infected with HIV/AIDS while 244 (16.7%) patients aged below 24 years were also infected. The incidence rate of HIV/AIDS infection was moderate at 8.1 while annual increase in HIV/AIDS infection was not statistically significant at p<0.05.
Leaf Epidermal Characteristics of Four Species of the Genus Citrus (Rutaceae)
F.N. Mbagwu,C.U. Nwachukwu,B.C. Ubochi
Agricultural Journal , 2013,
Abstract: Studies on the leaf epidermal characteristics of 4 species of Citrus namely: C. sinensis, C. limon, C. aurantifolia and C. parandisi were carried out to investigate and compare the leaf epidermal features and possibly establish the taxonomic relationships among these taxa. The results showed that at the lower leaf epidermis, the epidermal cells of C. sinensis and C. aurantifolia are irregular but vary from pentagonal to hexagonal in C. limon and rectangular to pentagonal in C. paradisi. Also, at the upper leaf epidermis, the epidermal cells of C. sinensis and C. paradisi are irregular, pentagonal in C. aurantifolia but vary from rectangular to pentagonal in C. limon. Both taxa showed interspecie similarities in anomocytic stomata, absence of stomata at the upper leaf epidermis, absence of trichomes, absence of subsidiary cells and thick walled cells that characterized all the species. The similarities in structures are strong reasons for the 4 taxa to be in the same genus while the differences suggest reasons for the existence of each as a separate specie and thus strenghten the reliability of leaf epidermal features as taxonomic tools.
Root anatomical studies on Solanum macrocarpum and Solanum nigrum (Solanaceae)
F.N Mbagwu, O.O Okoro, C.U Nwachukwu
African Journal of Biotechnology , 2009,
Abstract: The anatomical characteristics of the roots of Solanum macrocarpum and Solanum nigrum were investigated to ascertain the relevance of these characters in establishment of interspecific similarities and differences in these two taxa. The results showed that there is concentration of vascular bundles at the central portion of the root cortex hence the endodermis is not well differentiated in both taxa. Again the epidermal cells are big and well differentiated in S. macrocarpum but small and well differentiated in S. nigrum. The epidermal cells range from pentagonal to hexagonal in S. macrocarpum but irregularly shaped in S. nigrum. The cells outside the cortex are thick and big in S. macrocarpum but thin, small and elongated in S. nigrum. Although, the size and number of vascular bundles are small and few in both taxa, the presence of one or two oxalate crystals that characterized S. macrocarpum but absent in S. nigrum is an interesting aspect of the root anatomy. The similarities in structures showed reasons for the two taxa to be in the same genus while the differences in root anatomical structures showed reasons for them to be as different species.
Effect of Genotype and Frequency of Semen Collection on Semen Characteristics of Local Chicken Cocks
E.N. Nwachukwu,S.N. Ibe,C.U. Amadi
Journal of Animal and Veterinary Advances , 2012,
Abstract: This study reports the effect of genotype and frequency of semen collection on seminal traits of local chicken cocks. Semen was collected, using the back-lumbar massage method from Normal Feather (NOF), Naked Neck (NN), Frizzle (FR) and Naked Neck x Frizzle (NNxFR) cocks at two ejaculation frequencies, namely once and twice per week for nine weeks. Ejaculates were subjected to both physical and laboratory evaluations for quality. Results showed that there were significant (p<0.05) differences between the genotypes for semen volume with the NOF (0.15±0.009 mL) and NN x FR (0.13±0.013 mL) cocks having higher semen volumes than that of the NN (0.11±0.013 mL) and FR (0.08±0.013 mL) counterparts. Total spermatozoa was the only seminal trait significantly affected by the two frequencies of collection with once a week giving higher values than twice a week collection. Interaction effect was significant for sperm concentration and total spermatozoa. This effect was stronger when semen was harvested twice a week with the NN x FR and NOF cocks producing higher values. It was therefore concluded that NN x FR and NOF genotype were superior to their NN and FR counterparts in both semen output and frequency of semen collections and may be considered as potential candidates for use in natural mating and/or artificial insemination programmes aimed at improving the lot of the local chicken.
Interplay of Gender Inequities, Poverty and Caste: Implications for Health of Women in the Cashew Industry of Kerala
Thresia C.U.
Social Medicine , 2007,
Abstract: Kerala has achieved remarkable improvements in the social sectors despite having a low economy. Yet, beyond the face value of averages, this article argues that, improvements in quality of life of people are not distributed uniformly across gender, social class and caste. Often cultural perceptions and meanings of health and development discourses vary across different sections of the society. Exploration of the life of cashew processing women workers unravel myriad tribulations including higher levels of illiteracy, poverty, morbidity, fertility, gender based violence, caste based inequities, and lack of access to health care and political support. Unequal gender power relations get formatted in the larger matrix of structural inequities, hampering the health of women. Therefore in order to improve the health conditions of women conventional biomedical discourses are inadequate. Social and structural factors determining the health of women have to be addressed, beyond the health sector. Strengthening the public provision of health and social services with active involvement of various participants, particularly woman, is a necessary precondition for improving the quality of health care and life. Yet, the neoliberal initiatives underway in the health sector which strengthens privatisation will further endanger the already weakened public health scenario in the state
Page 1 /233313
Display every page Item


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