Bio

PROF. PATEL JAYANTI P

Personal Information

Areas Of Specialization

Geophysics

Publications


2016

Meert, JG, der Voo RV.  2016.  A Neoarchean paleomagnetic pole from the Kisii Series of western Kenya: Implications for crustal mobility. Precambrian Research. 279:91–102. Abstract

The Kisii Series lavas of western Kenya were the target of a paleomagnetic study. The Kisii Series is a volcano-sedimentary sequence dated to 2531 ± 3 Ma (U–Pb) that rests unconformably over the Mesoarchean–Neoarchean Nyanzian and Kavirondian Series. The paleomagnetic study reported in this paper expands on an earlier study by Brock et al. (1972) using modern demagnetization and analysis techniques. In spite of the advanced methods, the results of both our new study and the previous study are statistically indistinguishable. We therefore combine the results of both investigations to arrive at a grand mean pole at 7° S, 166° E (A95 = 8°). Due to the relatively minor tilt-corrections, a fold test is inconclusive; however, the dual-polarity magnetization passes a reversal test. We argue for a primary remanence on the basis of a comparison to other paleomagnetic data in Kenya and Tanzania and geological information. We examine the relationships between age-equivalent paleomagnetic poles from the Tanzanian, Zimbabwe and Kaapvaal cratons. Based on this limited dataset, we cannot conclude whether or not the observed apparent polar wander was due to true polar wander or modern-style plate tectonics, such as would be implied by the (variable) apparent polar wander path segments. We favor the latter explanation based on the disparate lengths of the Zimbabwe versus Tanzanian apparent polar wander paths during the 2700–2500 Ma interval. The Protopangea model is not consistent with paleomagnetic data from these three cratons.

Sojitra, NA, Sojitra NA, Patel RK, Dixit BC.  2016.  Classical and microwave assisted synthesis of new 4-(3,5-dimethyl-1-phenyl-1H-pyrazol-4-ylazo)-N-(2-substituted-4-oxo-4H-quinazolin-3-yl)benzenesulfonamide derivatives and their antimicrobial activities. Journal of Saudi Chemical Society. 20(1) Abstract

A simple and efficient methodology was developed for the synthesis of new 4-(3,5-dimethyl-1-phenyl-1H-pyrazol-4-ylazo)-N-(2-substituted-4-oxo-4H-quinazolin-3-yl)benzenesulfonamide derivatives 10a–10j in good amount of yields. They have been prepared using 2-acetamidobenzoic acid derivatives 2a–2j via intermediates benzenesulfonamide substituted quinazolinone derivatives 8a–8j, and its corresponding hydrazono derivatives 9a–9j. Entitled compounds (10a–10j) were also obtained using microwave heating in good amount of yields. The structures of all the new compounds have been evaluated on the basis of elemental analysis, FT-IR, 1H and 13C NMR spectral studies. Entitle compounds have been screened for their in vitro antimicrobial activities and all these compounds displayed excellent to moderate activities, which were found to be significantly potent against bacteria compared to fungal.

2015

Chaudhari, J, Prajapati P, Sethuraman R, Naveen YG.  2015.  Comparative evaluation of the amount of gingival displacement produced by three different gingival retraction systems: An in vivo study. Contemporary Clinical Dentistry. Abstract

Statement of Problem:

Tetrahydrozoline has been introduced as new gingival retraction agent but its clinical efficacy with widely used conventional retraction agents has not been tested.

Purpose:

The study was designed to clinically evaluate efficacy of newer retraction agent tetrahydrozoline with two widely used retraction systems i.e., Expasyl retraction system and medicated retraction cords on basis of amount of gingival retraction.

2014

Odumo, BO’, Carbonell G, Kalambuka Angeyo H, Torrijos M, Martín JAR.  2014.  Impact of gold mining associated with mercury contamination in soil, biota sediments and tailings in Kenya. Environmental Science and Pollution Research. 21(21) Abstract

This work considered the environmental impact of artisanal mining gold activity in the Migori–Transmara area (Kenya). From artisanal gold mining, mercury is released to the environment, thus contributing to degradation of soil and water bodies. High mercury contents have been quantified in soil (140 μg kg−1), sediment (430 μg kg−1) and tailings (8,900 μg kg−1), as expected. The results reveal that the mechanism for transporting mercury to the terrestrial ecosystem is associated with wet and dry depositions. Lichens and mosses, used as bioindicators of pollution, are related to the proximity to mining areas. The further the distance from mining areas, the lower the mercury levels. This study also provides risk maps to evaluate potential negative repercussions. We conclude that the Migori–Transmara region can be considered a strongly polluted area with high mercury contents. The technology used to extract gold throughout amalgamation processes causes a high degree of mercury pollution around this gold mining area. Thus, alternative gold extraction methods should be considered to reduce mercury levels that can be released to the environment.

2013

Patel, A, Sethuraman R, Prajapati P, Naveen YG.  2013.  A comparative analysis of staining characteristics of mouthrinses on provisional acrylic resin: An in vitro study. Journal of Interdisciplinary Dentistry. 3(3):167-173. Abstract

Aim and Objective: Provisionalization is essential for tooth protection and treatment outcome evaluation. Utmost care should be taken to maintain the soft tissue health when provisionals are cemented. Mouthrinses are commonly used as an adjunct to protect against caries and periodontal diseases. Thesesolutions are responsible for discolouration of provisional materials. In the present study, the aim is to assess the staining potentials of a chlorhexidine gluconate rinse, a benzydamine hydrochloride rinse and a tea tree oil rinse on a provisional acrylic material in vitro by application of a digital system for colour analysis Materials and Method: In this study, the staining potentials of a tea tree oil, a chlorhexidine gluconate rinse, and a benzydamine hydrochloride rinse was investigated; whereas distilled water was used as the control. Results: Color change of a commercially available provisional restorative material was evaluated after 24 hours immersion in three different mouthrinses. ∆E values obtained were 1.76 for chlorhexidine gluconate, 1.55 for benzydamine hydrochloride and 1.88 for TTO. Conclusion: Within the limitations of the current study, it is concluded that benzydamine hydrochloride exerts the least perceptible change in colour of bisacryl composite provisional resin material.
Clinical Relevance to Interdisciplinary Dentistry

Dentistry today is vastly different from what it was before.
Today it is in the era of interdisciplinary approach from independent to interdependent.
It is more result oriented and more successful when any case or situation is handled combined by interdisciplinary experts.
Action and role of mouthrinses and their interdisciplinary outcome is evaluated in the present study.

2012

Mulwa, BM, Maina DM.  2012.  Multielemental Analysis of Limestone and Soil Samples of Kitui South (Kenya) Limestone Deposits . International journal of fundemental physical sciences. 2(4):48-51. Abstract

The results of analysis of heavy metal in limestone and soil samples from the limestone deposit areas of Kitui South, Kenya
were reported in this paper. The analysis was carried out to assess the environmental impact of heavy metals in the region and
provide necessary data on the extent of their spread that could be used as a basis for monitoring occupational exposure and
the and subsequent environmental impact once mining and processing of limestone in the region starts. Limestone and soils
were sampled from three major limestone deposit areas in the region of Kituvwi, Mwanyani and Ndulukuni and analyzed for
heavy elemental content using
109
Cd radioisotope excited EDXRF spectrometry technique in which sample pellets were
directly irradiated. The major elements detected in soils were Ti, Mn, Cu, Zn, and Pb, while in limestone they were; Ti Mn
and Zn.

2011

2010

2007

Opdyke, ND, Kent DV, Huang K, Patel JP.  2007.  Preliminary Equatorial Paleomagnetic results from Mt. Kenya Lavas.

2004

OLAKEKAN, DRMUSTAPHAAMIDU, P PROFPATELJAYANTI.  2004.  Evaluation of Geophagia as a pathway for internal exposure to ionizing radiation. Proceedings of the 11th International Congress of the International Radiation Protection Association (IRPAA11), Madrid, Spain, May 23-28, 2004. : Canadian Center of Science and Education Abstract
Twenty variceal banding sessions were performed in eight patients between February 1995 and September 1996. A total of 69 rings were used to band the varices and at each session between two to six rings were used. Two of the eight had active bleeding and both underwent variceal banding to successfully arrest their bleeding as inpatients. Sixteen other variceal banding sessions were performed on an outpatient basis to obliterate their varices. Four of the eight patients had had sclerotherapy before and varices were still present. No acute or long term complications were noted. In one patient, variceal banding could not be performed as he developed stridor upon placement of the overtube. All the patients had advanced varices (Grade III or IV) and extended for more than 15 cms in the oesophagus. Endoscopic variceal obliteration remains the treatment of choice for patients with portal hypertension with variceal bleeding. Variceal banding is associated with a superior outcome when compared with sclerotherapy; the variceal kill time is shorter, infective complications less, rebleeding occurs less commonly and transfusion requirements are lower.

2002

OLAKEKAN, DRMUSTAPHAAMIDU, P PROFPATELJAYANTI.  2002.  Preliminary reports on Radon Concentration in Drinking Water and Indoor Air in Kenya.. Environmental Geochemistry & Health, 24, 387 . : Canadian Center of Science and Education Abstract
Twenty variceal banding sessions were performed in eight patients between February 1995 and September 1996. A total of 69 rings were used to band the varices and at each session between two to six rings were used. Two of the eight had active bleeding and both underwent variceal banding to successfully arrest their bleeding as inpatients. Sixteen other variceal banding sessions were performed on an outpatient basis to obliterate their varices. Four of the eight patients had had sclerotherapy before and varices were still present. No acute or long term complications were noted. In one patient, variceal banding could not be performed as he developed stridor upon placement of the overtube. All the patients had advanced varices (Grade III or IV) and extended for more than 15 cms in the oesophagus. Endoscopic variceal obliteration remains the treatment of choice for patients with portal hypertension with variceal bleeding. Variceal banding is associated with a superior outcome when compared with sclerotherapy; the variceal kill time is shorter, infective complications less, rebleeding occurs less commonly and transfusion requirements are lower.

2000

1999

OLAKEKAN, DRMUSTAPHAAMIDU, P PROFPATELJAYANTI.  1999.  Dose rate conversion factors for external exposures inside African traditional buildings. In: Ed. M. C. Thorne. Proceedings of 6th Society for Radiological Protection (SRP) International Symposium, Southport, 14 . : Canadian Center of Science and Education Abstract
Twenty variceal banding sessions were performed in eight patients between February 1995 and September 1996. A total of 69 rings were used to band the varices and at each session between two to six rings were used. Two of the eight had active bleeding and both underwent variceal banding to successfully arrest their bleeding as inpatients. Sixteen other variceal banding sessions were performed on an outpatient basis to obliterate their varices. Four of the eight patients had had sclerotherapy before and varices were still present. No acute or long term complications were noted. In one patient, variceal banding could not be performed as he developed stridor upon placement of the overtube. All the patients had advanced varices (Grade III or IV) and extended for more than 15 cms in the oesophagus. Endoscopic variceal obliteration remains the treatment of choice for patients with portal hypertension with variceal bleeding. Variceal banding is associated with a superior outcome when compared with sclerotherapy; the variceal kill time is shorter, infective complications less, rebleeding occurs less commonly and transfusion requirements are lower.

1998

J., MRMANGALAMICHAEL, P PROFPATELJAYANTI, KALAMBUKA DRANGEYOHUDSON.  1998.  Radio Isotope Photon Excited Energy Dispersive X-ray Fluorescence Technique for the Analysis of Organic Matrices. X-ray Spectrometry, Vol. 27, 205 . : Canadian Center of Science and Education Abstract
Twenty variceal banding sessions were performed in eight patients between February 1995 and September 1996. A total of 69 rings were used to band the varices and at each session between two to six rings were used. Two of the eight had active bleeding and both underwent variceal banding to successfully arrest their bleeding as inpatients. Sixteen other variceal banding sessions were performed on an outpatient basis to obliterate their varices. Four of the eight patients had had sclerotherapy before and varices were still present. No acute or long term complications were noted. In one patient, variceal banding could not be performed as he developed stridor upon placement of the overtube. All the patients had advanced varices (Grade III or IV) and extended for more than 15 cms in the oesophagus. Endoscopic variceal obliteration remains the treatment of choice for patients with portal hypertension with variceal bleeding. Variceal banding is associated with a superior outcome when compared with sclerotherapy; the variceal kill time is shorter, infective complications less, rebleeding occurs less commonly and transfusion requirements are lower.
KALAMBUKA, DRANGEYOHUDSON, P PROFPATELJAYANTI.  1998.  Measurements of trace elements levels in Kenyan cigarettes with energy dispersive X-ray fluroscence spectroscopy technique. J. Trace & Microprobe Techniques, Vol. 16, No.2, 233 . : Canadian Center of Science and Education Abstract
Twenty variceal banding sessions were performed in eight patients between February 1995 and September 1996. A total of 69 rings were used to band the varices and at each session between two to six rings were used. Two of the eight had active bleeding and both underwent variceal banding to successfully arrest their bleeding as inpatients. Sixteen other variceal banding sessions were performed on an outpatient basis to obliterate their varices. Four of the eight patients had had sclerotherapy before and varices were still present. No acute or long term complications were noted. In one patient, variceal banding could not be performed as he developed stridor upon placement of the overtube. All the patients had advanced varices (Grade III or IV) and extended for more than 15 cms in the oesophagus. Endoscopic variceal obliteration remains the treatment of choice for patients with portal hypertension with variceal bleeding. Variceal banding is associated with a superior outcome when compared with sclerotherapy; the variceal kill time is shorter, infective complications less, rebleeding occurs less commonly and transfusion requirements are lower.
P, PROFPATELJAYANTI, OLAKEKAN DRMUSTAPHAAMIDU.  1998.  Measurements of radionuclide contents of some Natural Building Materials in Kenya and Radiological impact Assessment. J. Radiation Protection Dosimetry, Vol. 71, No. 1, pp. 65-69.. : Canadian Center of Science and Education Abstract
Twenty variceal banding sessions were performed in eight patients between February 1995 and September 1996. A total of 69 rings were used to band the varices and at each session between two to six rings were used. Two of the eight had active bleeding and both underwent variceal banding to successfully arrest their bleeding as inpatients. Sixteen other variceal banding sessions were performed on an outpatient basis to obliterate their varices. Four of the eight patients had had sclerotherapy before and varices were still present. No acute or long term complications were noted. In one patient, variceal banding could not be performed as he developed stridor upon placement of the overtube. All the patients had advanced varices (Grade III or IV) and extended for more than 15 cms in the oesophagus. Endoscopic variceal obliteration remains the treatment of choice for patients with portal hypertension with variceal bleeding. Variceal banding is associated with a superior outcome when compared with sclerotherapy; the variceal kill time is shorter, infective complications less, rebleeding occurs less commonly and transfusion requirements are lower.
P, PROFPATELJAYANTI, KALAMBUKA DRANGEYOHUDSON.  1998.  Optimization of X-ray Fluorescence Elemented analysis.. An example from Kenya Applied Radiation & Isotopes, 49, 885 . : Canadian Center of Science and Education Abstract
Twenty variceal banding sessions were performed in eight patients between February 1995 and September 1996. A total of 69 rings were used to band the varices and at each session between two to six rings were used. Two of the eight had active bleeding and both underwent variceal banding to successfully arrest their bleeding as inpatients. Sixteen other variceal banding sessions were performed on an outpatient basis to obliterate their varices. Four of the eight patients had had sclerotherapy before and varices were still present. No acute or long term complications were noted. In one patient, variceal banding could not be performed as he developed stridor upon placement of the overtube. All the patients had advanced varices (Grade III or IV) and extended for more than 15 cms in the oesophagus. Endoscopic variceal obliteration remains the treatment of choice for patients with portal hypertension with variceal bleeding. Variceal banding is associated with a superior outcome when compared with sclerotherapy; the variceal kill time is shorter, infective complications less, rebleeding occurs less commonly and transfusion requirements are lower.

1997

Mustapha, AO, Narayana DGS, Patel JP, Otwoma D.  1997.  Natural Radioactivity in Some Building Materials in Kenya and the Contributions to the Indoor External Doses. AbstractNatural Radioactivity in Some Building Materials in Kenya and the Contributions to the Indoor External Doses

Against a background of growing concern over the health risks associated with exposure to natural sources of radiation, a study has been carried out in Kenya in which the activity concentrations of the major radionuclides in some natural building materials are determined. Different types of rock and soil samples were analysed with a gamma ray spectrometer. Typical activities, so far encountered, are in the ranges: 50 to 1500 Bq.kg-1 for 40K; 5 to 200 Bq.kg-1 for 226Ra; and 5 to 300 Bq.kg-1 for 232Th. The external gamma ray absorbed doses in indoor air, and the corresponding effective dose equivalents in a typical dwelling are presented. The need for further studies is also discussed.

1994

Patel, JP.  1994.  Seismic Contributions of the Kenyan Rift Valley. AbstractWebsite

The past and the present understanding of the deep lithospheric structures beneath the Kenyan Rift Valley is reviewed and the results of the long-range explosion seismic experiment are discussed. A sill like intrusive body exists in the lower crust and there is only moderate crustal thinning beneath the central sector. No evidence has been established for the 'axial intrusion' to shallow depths.

1991

1990

Henry, WJ, Mechie J, Maguire PKH, Khan MA, Prodehl C, Keller GR, Patel J.  1990.  A Seismic Investigation of the Kenya Rift Valley. AbstractWebsite

In August 1985 the crustal structure underlying the southern part of the Kenya Rift Valley was investigated by long-range explosion seismology. the experiment (KRISP 85) consisted of two seismic lines in the central sector of the rift, one along the axis and the other across it. Interpretation of the data, including time-term analysis and ray tracing has shown that the thickness of rift infill varies from about 6km below Lake Naivasha to about 2 and 1.5km below Lake Magadi and Lake Bogoria respectively. the underlying material has a P-wave velocity of 6.05 ± 0.03 km s-1 which suggests that the rift is underlain by Precambrian metamorphic basement. A localized high-velocity zone identified to the east of Nakuru may be due to basic intrusive material. the P-wave velocity increases discontinuously to 6.45 ± 0.2 km s-1 at a depth of 12.5 ± 1.0 km below sea level. This depth is similar to that inferred for the brittle-ductile transition zone from a study of local seismicity in the Lake Bogoria region. A high P-wave velocity layer (7.1 ± 0.2 km s-1) occurs at 22 ± 2 km depth below sea level which might be associated with a sill-like basic intrusion in the lower crust. an upper mantle velocity of 7.5 ± 0.2 km s-1 (unreversed) is reached at a depth of 34.0 ± 2.0 km below sea level. This implies that only moderate crustal thinning has occurred beneath the central sector of the rift. No evidence was obtained for the existence of a continuous‘axial intrusion’ reaching to shallow levels below the rift and associated with crustal separation as suggested by previous studies.

1989

Patel, JP.  1989.  Palaeomagnetic results from late Archaean and early proterozoic granites from South Western Kenya. AbstractPalaeomagnetic results from late Archaean and early proterozoic granites from South Western Kenya

Results of a palaeomagnetic study carried out on the Migori granites exposed in the South Western part of Kenya are presented. The granites of Post-Nyanzian and Post-Kavirondian ages are dated at View the MathML source, respectively, using the whole rock RbSr isochron method. Alternating frequency and thermal demagnetization techniques have been used to isolate characteristic components of natural remanence. Opaque petrological and thermomagnetic studies indicate titanomagnetite grains as the main carrier of the primary component. The mean palaeomagnetic poles for the Post-Nyanzian and the Post-Kavirondian granites are located at 336°E, 72°N (View the MathML source) and 263°E, 41°N (View the MathML source), respectively.

Khan, AM, Maguire PKH, Henry W, Higham M, Patel J, Keller G, Mechie J.  1989.  A crustal seismic refraction line along the axis of the S.Kenya Rift. Website

1988

1987

1986

1984

1983

1981

Patel, JP.  1981.  The Proterozoic Tectonics of Africa.

1980

1979

Patel, JP, Raja PKS.  1979.  Paleomagnetic results from the Narosura and Magadi volcanics of Kenya. AbstractPaleomagnetic results from the Narosura and Magadi volcanics of Kenya

Results of a paleomagnetic study carried out on the exposed volcanic rocks on the western side of the South Kenya Rift Valley are presented. Nine stratigraphic groups ranging in age from Miocene to Pleistocene were sampled. The rocks consist of basalts, trachytes, nephelinites, melanephelinites, olivine melanephelinites and ignimbrites. Paleomagnetic poles obtained for different age ranges are as follows: Period I (0.64–0.72 Ma), 116°E, 85°N (A95 = 6°); Period II (1.6–6.9 Ma), 297°E, 84°N (A95 = 4°); Period III (12.0–15.0 Ma), 34°E, 80°N (A95 = 9°). The results for Period II show large secular variations which are in disagreement with the model predictions for near-equatorial sites.

Patel, JP, Raja PKS.  1979.  A palaeomagnetic study of lower Proterozoic granites from Western Kenya. AbstractA palaeomagnetic study of lower Proterozoic granites from Western Kenya

This paper reports a palaeomagnetic study of the lower Proterozoic granites, exposed in the western part of Kenya and dated at 2530 ± 50 Ma (λRb= 1.39 × 10−11 yr−1). Ten sites out of 13 have yielded stable palaeomagnetic directions which are believed to be primary. Polished section and thermomagnetic analyses indicate titanomagnetite grains as the main carrier of the primary component of the natural remanence. The mean palaeomagnetic north pole is calculated at 210.7° E, 60.9° N with A95= 13.5°.

1976

1972

Patel, JP, Gacii P.  1972.  Palaeomagnetic Studies Of The Kapiti Phonolite Of Kenya. AbstractPalaeomagnetic Studies Of The Kapiti Phonolite Of Kenya

Specimens of Kapiti phonolite from sixteen sites were treated in an alternating field up to 900 Oe peak. Four sites were discarded on the basis of Watson's Criterion for randomness. Variations in various magnetic parameters along a vertical section of the rock indicate that a hard secondary component of magnetization of high coercive force is present in the surface samples of the rock — a possible cause for the poor grouping of directions of the remaining sites. Weathering may have introduced this component in the surface samples. The Kapiti phonolite possesses both normal and reverse polarities. The Pole position for the Upper Miocene is calculated at 81°N, 118°E with a circle of confidence of 17°.

1971

1967

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