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Search Results: 1 - 10 of 531938 matches for " P.M. Gatongi "
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Exsheathment Characteristics and Infectivity of Revived Anhydrobiotic L3 of Haemonchus Contortus
D.N. Siamba,C.S. Mulambalah,M.M. Ngeiywa,P.M. Gatongi
International Journal of Animal and Veterinary Advances , 2012,
Abstract: This study was conducted to determine the effect of temperature and moisture stress on exsheathment process and infectivity of the infective larvae of the parasitic nematode Haemonchus contortus. Laboratory conditions were used in which infective (L3) of H. contortus were either subjected to gradually increasing temperatures, decreasing moisture or both. Post stress viability and exsheatment of L3 was determined prior to infection experiments. The viability of H. contortus after induction of anhydrobiosis declined significantly (p<0.05) from 85 to 60% in about 60 days. The results showed significant (p<0.05) delay in exsheathment in stressed larvae compared to unstressed larvae leading to low overall establishment (Infection). However, the proportion of the immature in relation to the mature parasites (hypobiosis) was significantly (p<0.05) higher in stressed compared to the unstressed L3. These results indicate that delayed exsheatment in stressed L3 contributes to low infectivity in ruminants.
Changes in Lipids Utilisation During Moisture and Temperature Stress of Infective (L3) and its Implication on the Epidemiology of Haemonchus contortus in Arid and Semi Arid Lands
D.N. Siamba,P.M. Gatongi, C.S. Mulambalah, M.M. Ngeiywa, L.W. Wamae and A. Wambugu
Current Research Journal of Biological Sciences , 2011,
Abstract: A study was undertaken to establish the pattern and level of lipid utilization in third stage infective larvae (L3) of Haemonchus contortus under temperature and moisture stress conditions. The stress factors were representative of an arid and semi arid site in Kenya. The L3 were subjected to gradual increase and reduction in temperature and moisture, respectively, using a programmable cold/heat testing chamber. Optical density per area (Corrected average pixels) derived from image analysis of individual stained larvae using an image analysis software (UN SCAN IT gel(r)), were used to estimate the lipid content of larvae subjected to different stress treatments. It was observed that lipid content of the L3 declined and was negatively correlated with duration of exposure with significantly (p = 0.012) lower rates in moisture compared to temperature stressed L3. It was also observed that the decline occurred in phases signifying possible adaptive physiological process aimed at preserving lipid reserves and viability. During revival, there was a drastic decline in lipid reserves probably as a result of increased lipid utilisation by the reviving larvae. The epidemiological significance of these findings in field larvae is discussed.
Contributions of weather variables for specific adaptation of rubber tree (Hevea brasiliensis Muell.- Arg) clones
Priyadarshan, P.M.;
Genetics and Molecular Biology , 2003, DOI: 10.1590/S1415-47572003000400006
Abstract: the specific adaptation of 15 rubber tree (hevea brasiliensis) clones was assessed by analyzing yield during a normal year (1997-98) and a year (1998-99) in which the yield was exceptional. differences in yield in response to changes in weather conditions over the years were evident with clones rrii 203, rrim 703, pb 5/51 and pb 235 which all exhibited a negative trend with increasing wind velocity during 1997-98, these clones also exhibited a negative correlation with minimum temperature during 1998-99. the prominent yield differences across the years made selection based on both yield and stability inevitable through computing weather variables and environmental index as covariant. to determine the contribution of variable(s) to genotype-environment (ge) interactions, the ge interaction was partitioned into heterogeneity and residual ge interaction. heterogeneity only for environmental index was highly significant (p = 0.01), meaning that stability or instability of clones was due to a linear effect of the environmental index. the non-significant values of heterogeneity for the weather variables revealed that none of these factors individually was sufficient to explain heterogeneity. a qbasic computer program called stable was used to select simultaneously for yield and stability. clones pb 235, rrii 118, rrii 203, rrim 703 and rrim 600 were stable over the years investigated.
Lesión por disparo con rebote atípico de proyectil 9 mm Luger KPO
Garamendi,P.M.;
Cuadernos de Medicina Forense , 2004, DOI: 10.4321/S1135-76062004000300006
Abstract: we present a case report about an atypical gunshot wound with 9 mm luger kpo ammunition. ballistic reconstruction indicates that the bullet was fragmented and ricocheted from an asphalt surface and then hit the victim's body. the gunshot was produced at a very short distance from the victim's shirt. bibliographic data suggest that this a possible but extremely unusual circumstance. animated three dimensional models make it easy to explain atypical spatial surroundings and positions of people implicated in a gunshot wound. infographic commercial programs let us recreate these models.
Proposed conservation plan for the black rhinoceros Diceros bicomis in South Africa, the TBVC* states and Namibia
P.M. Brooks
Koedoe : African Protected Area Conservation and Science , 1989, DOI: 10.4102/koedoe.v32i2.470
Abstract: Selected Papers from the Rhinoceros Conservation Workshop, Skukuza, Kruger National Park,31 August – 4 September 1988 The conservation plan for the black rhinoceros presents specific aims and management guidelines for the conservation of the African black rhinoceros Diceros bicomis in the Republic of South Africa, the TBVC states and Namibia. The adoption of this plan, and the application of the strategies described therein (managing existing populations, establishing new populations and aspects of captive breeding) by the relevant conservation authorities should enhance the survival prospects of this species, both in the region and globally.
Contributions of weather variables for specific adaptation of rubber tree (Hevea brasiliensis Muell.- Arg) clones
Priyadarshan P.M.
Genetics and Molecular Biology , 2003,
Abstract: The specific adaptation of 15 rubber tree (Hevea brasiliensis) clones was assessed by analyzing yield during a normal year (1997-98) and a year (1998-99) in which the yield was exceptional. Differences in yield in response to changes in weather conditions over the years were evident with clones RRII 203, RRIM 703, PB 5/51 and PB 235 which all exhibited a negative trend with increasing wind velocity during 1997-98, these clones also exhibited a negative correlation with minimum temperature during 1998-99. The prominent yield differences across the years made selection based on both yield and stability inevitable through computing weather variables and environmental index as covariant. To determine the contribution of variable(s) to genotype-environment (GE) interactions, the GE interaction was partitioned into heterogeneity and residual GE interaction. Heterogeneity only for environmental index was highly significant (p = 0.01), meaning that stability or instability of clones was due to a linear effect of the environmental index. The non-significant values of heterogeneity for the weather variables revealed that none of these factors individually was sufficient to explain heterogeneity. A QBASIC computer program called STABLE was used to select simultaneously for yield and stability. Clones PB 235, RRII 118, RRII 203, RRIM 703 and RRIM 600 were stable over the years investigated.
Die makrososiale ruimte van die Boek van die Wagte (1 Henog 1-36)
P.M. Venter
HTS Theological Studies/Teologiese Studies , 2009, DOI: 10.4102/hts.v58i4.707
Abstract: The macro social space of the Book of the Watchers (1 Enoch 1-36) An analysis of the material of the Book of the Watchers ( 1 Enoch 1-36) indicates a preference for the spatial aspect in these revelation narratives. In an attempt to understand this preference, an investigation is launched into the macro social world of the narratives. Themes in Enoch from literature in the Bible, the Syro-Phoenician world, Pseudo Epolemus, Zenon Papyri, Persia and Greece, are identified. Ptolemean Palestine is also investigated as the context within which an Enochic tradition was formed. Amongst other traditions an opposing Mosaic Judaism and Enochic Judaism are identified. Both take up the challenges of the third century with its Hellenistic onslaught and explosion of knowledge. The Book of the Watchers represents an Enoch tradition, which forms an early trajectory of apocalyptic thinking, and which is being influenced by various traditions such as wisdom literature in its mantic form, cosmological schemes of the world, and mythic traditions.
Reviewing history in apocalyptic literature as ideological strategy
P.M. Venter
HTS Theological Studies/Teologiese Studies , 2009, DOI: 10.4102/hts.v60i3.574
Abstract: Reviews of history are ideological constructions. This article investigates historical reviews in the apocalyptic literature of Daniel and Ethiopic Enoch. In Daniel 2 a fourfold scheme of successive kingdoms/empires/eras is used to persuade the hearers that their political trials will come to an end. In Daniel 7 a theology of history is formulated in terms of animal symbols and four consecutive eras. This review is used to proclaim God’s total sovereignty over kings and kingdoms. The faithful can only wait with patience for God to bring history to its finalisation. In Enoch’s Apocalypse of the Weeks a historical review of humanity’s history is used to advocate the eschatological hope of the annihilation of sin and eternal vindication of righteousness. Summaries of history in the form of the traditional biblical history (1 Enoch 85-89) and an Animal Vision (1 Enoch 89-90) of seventy periods is used to appraise contemporary political-military events and advocate the reader’s participation in these actions as eschatological liberating events.
The dietary regulations in Deuteronomy 14 within its literary context
P.M. Venter
HTS Theological Studies/Teologiese Studies , 2009, DOI: 10.4102/hts.v58i3.570
Abstract: A structural analysis of Deuteronomy 14:1-21 indicates a well planned composition. A comparison with the same set of dietary regulations in Leviticus 11:2-20 indicates a process of literary growth in the Deuteronomy composition. An original list of land animals was extended into a literary unit on dietary regulations. A technique of inclusio was used in different literary layers to form this unit and to include it in the Deuteronomic Code and eventually in the Pentateuch. Different theories on Pentateuchal growth are considered so as to understand the ethical meaning of these dietary regulations within this larger literary framework.
Constitualised space in Daniel 9
P.M. Venter
HTS Theological Studies/Teologiese Studies , 2009, DOI: 10.4102/hts.v60i1/2.497
Abstract: The prayer in Daniel 9 theologically paved the way for prayers in the later synagogue. In this chapter the Daniel tradents linked a traditional penitential prayer to an apocalyptic narrative. Through this combination their view that man has to wait upon God to change history, is extended into a life of sanctification, teaching, fasting and the offering of penitence. As these tradents were estranged from the temple, they had to find somewhere else to conduct their liturgical services. Their apocalyptic mythological view of the temple enabled them to constitualise holy space away from the material temple. In this way they paved the way for the synagogue as house of prayer in later times.
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