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Wyszukujesz frazę "Nandakumar, R." wg kryterium: Autor


Wyświetlanie 1-12 z 12
Tytuł:
The genetic diversity of HLA DRB1* alleles among Indian and African populations
Autorzy:
Nandakumar, R.
Powiązania:
https://bibliotekanauki.pl/articles/1158256.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Admixture
Demography
HLA DRB1
Indian and African populations
Migration
Population Genetics
Opis:
The HLA system is highly polymorphic and commonly used as a marker to understand core population genetical aspects such as stratification, human migration, predisposition to diseases and tissue transplantation compatibility. Although HLA alleles are generally treated as equidistant molecular units in population genetic studies, the diversity of DNA allelic frequencies among populations is also considered to be crucial to interpret the observed HLA polymorphisms. This study compares the variation of HLA DRB1 alleles across various subgroups of both Indian and African Populations, using their respective allelic frequencies. The HLA DRB1 allelic frequencies for 3,153 individuals of 32 subgroups of both Indian and African populations, were collected from the Allele Frequency Net Database (AFND). Correlation matrix and Grid diagram were compiled using the R statistical package. Allele frequencies were analyzed for the respective population subgroups using XLSTAT. The North East Indian populations were completely devoid of HLA DRB1* 16, which is fairly present in south Indian populations. The South Indian populations harbor both HLA DRB1* 10 and HLA DRB1* 15 at relatively higher levels but are very scarce of HLA DRB1* 07, HLA DRB1* 09, HLA DRB1* 12 and HLA DRB1* 13. The alleles HLA DRB1* 03, HLA DRB1* 04 and HLA DRB1* 07 could represent an epicenter for the admixture of African, North-East Indian and South Indian populations.
Źródło:
World Scientific News; 2018, 114; 15-29
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studies on the Mammalian Diversity of Dimapur, Nagaland, India
Autorzy:
Phejen, P.
Ao, Semsadangla
Thongliu, Shiutsu K.
Nienu, Razoukhrulu
Konyak, Shomying K.
Yanthan, Rollen
Vijila, Vincy
Nandakumar, R.
Powiązania:
https://bibliotekanauki.pl/articles/1158600.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
District Dimapur
Mammals
Naga tribal
Opis:
The exploration of mammalian diversity distributed at the tribal district of Dimapur in Nagaland, India revealed the presence of a diverse population of 16 species of mammals belonging to 16 genera, 16 families. The species of order Primate and a single species of order Oryctolagus cuniculus were observed in the Dimapur. The mammalian species reported presented an assemblage of unique and threatened species of mammals. The analysis of data revealed that Hoolock hoolock (Harlan, 1834) endogered species, Ursus thibetanus (G. Cuvier, 1823), Panthera pardus (Linnaeus, 1758) valnerble species and Oryctolagus cuniculus (Linnaeus, 1758) near threatened species have been listed in IUCN 3.1, while out of the sixty specie s reported ten species have been placed under different schedules of Indian Wildlife (Protection) Act 1972. A total of sixty species reported from the study area was found to be declared threatened by IUCN 3.1.
Źródło:
World Scientific News; 2018, 114; 126-136
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reptiles diversity in Dimapur of North East India
Autorzy:
Yanthungbeni, Margret
Kwabamli, Kwabamli
Hemsu, H.
Phom, Lily
Phom, M. Meyuchila
Yanthan, Rollen
Vijila, Vincy
Nandakumar, R.
Powiązania:
https://bibliotekanauki.pl/articles/1158637.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
District Dimapur
Reptile
diversity Naga tribal
Opis:
The goal of this research is to collect and identify the specimens of reptiles that are found in and around Dimapur, Nagaland. As per the research the data on 12 specimens were collected belonging to snakes, lizards and tortoise. The research highlights the diversity and variety of the types of reptiles present in the Nagaland, and also the possibility of discovering many more. We strongly require intensive studies to document reptiles and other biota of the state. Conservation of biodiversity involving local communities would be the best possible option in Nagaland, as the forest area are largely owned by people. Geochelone elegans (Schoepff, 1795), Python molurus (Linnaeus, 1758), Python binittatus (Kuhl, 1820) and Cuora amboinesis (Daudin, 1802), a total of three species reported from the study area were found to be declared threatened by IUCN 3.1.
Źródło:
World Scientific News; 2018, 114; 164-176
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Immune response of shrimp Peneaus monodon against Vibrio parahaemolyticus
Autorzy:
Muthaiyan, Rajikkannu
Krishnan, S.
Periyasamy, Selvakumar
Chetri, Zhievino
Nandakumar, R.
Powiązania:
https://bibliotekanauki.pl/articles/1031867.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
NBT activity and Pathogenesis
Penaeus monodon
V. parahaemolyticus
Opis:
The study was carried out on impact of vibriosis by using Vibrio parahaemolyticus in Peneaus monodon Fabricius, 1798, collected from Nagapattinam. The impact was studied on heamatological and biochemical parameters. Feeds were prepared by coating probiotic strains of B. firmus and B. coagulans. Laboratory investigations were carried out concerning impact of pathogenic Vibrio parahaemolyticus of total count, differential count, Nitroblue tetrazolium activity, Prophenoloxidase activity and bacterial clearance in P. monodon. Total heamocyte was enumerated in vibriosis by induced shrimps, all results showing an increase in total haemocyte count after the time of infection. After feeding, the total heamocyte count was 1442 cells/cu·mm in control animals, in B. coagulans supplemented animals 2757 cells/cu.mm and in B. firmus was 2448 cell/cu·mm. After feed supplementation the shrimps were infected with V. parahaemolyticus and their impact on total haemocyte count was assessed in all three groups. In control, the total haemocyte count was increased with 2560 cells/cu·mm, whereas in B. coagulansis 5126 cells/cu·mm, and in B. firmusis 4697cells/cu·mm. Two-way Analysis of Variance for total haemocyte count in normal and infected haemolymph showed a significant variation. The control samples recorded the lowest, and after infection B. coagulans supplemented animals recorded maximum counts among three groups. Differential count was evaluated by studying the three types of cells. There was not much variation in the percentage of cells, but a slight decrease was observed in the hyaline cells after 24 hours of infection. The NBT activity was 1.4 (NBT activity) in control animals, 2.7 in B. coagulans and 2.4 in B. firmus supplemented animals. Maximum reduction was observed in control animals with 0.92, 1.7 in B. coagulans and 1.4 in B. firmus supplemented animals. There was an initial spurt of vibrios when cultured in selective medium TCBS in all three treatments and gradual decrease in the vibrios count during 24 hours observation.
Źródło:
World News of Natural Sciences; 2020, 30, 2; 150-168
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of botanicals against: Mosquito Larvae to the Extracts of Fungus Beauveria Species
Autorzy:
Raj, M. Muni
Srikanth, G.
Rajikkannu, M.
Nandakumar, R.
Powiązania:
https://bibliotekanauki.pl/articles/1178276.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Armegeries subalbatus and Anopheles
Beauveria species
Culex quiquefaciatus
Opis:
The larvicidal activity of Beauveria species on mosquito Culex quiquefaciatus, Armegeries subalbatus and Anopheles species was done, penicilliumis a large genus of filamentous fungi widely distributed in soil and in associated with plants. It was observed that more toxicity of Beauveria extract towards the larvae of Anopheles species than Culex quinquifaciatus, The toxicity was lesser in Aremgeries subalbatus, The toxicity range was observed between 100 ppm to 250 ppm. The toxicity on mosquito may be due to the toxins, and secondary metabolites of Beauveria species. Cyanide also creates toxicity on larvae, Beauveria based mosquito control can be done after field trials under controlled environment.
Źródło:
World Scientific News; 2017, 88, 2; 199-210
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of botanicals against: mosquito larvae to the extracts Acalypha indica L.
Autorzy:
Muthaiyan, Rajikkannu
Phejen, P.
Nienu, Razoukhrulu
Periyasamy, Selvakumar
Nandakumar, R.
Powiązania:
https://bibliotekanauki.pl/articles/1031872.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Acalypha indica
Anopheles gambiae
Armigeres subalbatus
Culex quinquefasciatus
Opis:
Acalypha indica is the important medicinal herb found commonly on the waste land and roadsides throughout India. Their various uses in traditional medicine are for curative properties against inflammation, rheumatism, respiratory disorders, fever, bacterial infection and jaundice. The mosquito control potential of common indigenous plant, Acalypha indica. Mosquito species used for toxicity bioassay are Culex quinquefasciatus, Anopheles gambiae and Armigeres subalbatus. Acalypha indica activities of the plant extracts vary according to the species. The mortality rate of 4th stage larva at 5% concentration was significantly higher than the mortality, rates at 1%, 2%, 3% and 4% concentrations of crude plant extract at 12 hours and 24 h exposure. A higher mortality rate was observed at 24 h bioassay than at 12 h. Since these plants are available very easily and cheaply, we can use these extracts in the field.
Źródło:
World News of Natural Sciences; 2020, 30, 2; 169-177
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Enhancing Speech Recognition in Adverse Listening Environments: The Impact of Brief Musical Training on Older Adults
Autorzy:
Nandakumar, Akhila R
Somashekara, Haralakatta Shivananjappa
Kanagokar, Vibha
Pitchaimuthu, Arivudai Nambi
Powiązania:
https://bibliotekanauki.pl/articles/31339763.pdf
Data publikacji:
2024
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
musical training
carnatic music
speech recognition in noise
speech recognition in reverberation
Opis:
The present research investigated the effects of short-term musical training on speech recognition in adverse listening conditions in older adults. A total of 30 Kannada-speaking participants with no history of gross otologic, neurologic, or cognitive problems were divided equally into experimental (M = 63 years) and control groups (M = 65 years). Baseline and follow-up assessments for speech in noise (SNR50) and reverberation was carried out for both groups. The participants in the experimental group were subjected to Carnatic classical music training, which lasted for seven days. The Bayesian likelihood estimates revealed no difference in SNR50 and speech recognition scores in reverberation between baseline and followed-up assessment for the control group. Whereas, in the experimental group, the SNR50 reduced, and speech recognition scores improved following musical training, suggesting the positive impact of music training. The improved performance on speech recognition suggests that short-term musical training using Carnatic music can be used as a potential tool to improve speech recognition abilities in adverse listening conditions in older adults.
Źródło:
Archives of Acoustics; 2024, 49, 1; 3-9
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Bacillus coagulans and B. firmus incorporated probiotic diet on Superoxide dismutase activity and catalase activity in Penaeus monodon
Autorzy:
Raghu, P.
Rajikkannu, M.
Baburajan, R.
Deva, A.
Nandakumar, R.
Masilamni, V.
Prabhakaran, K.
Powiązania:
https://bibliotekanauki.pl/articles/1190216.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Probiotics
Penaeus monodon
V. Parahaemolyticus
SOD and CAT activity
Opis:
In the present study was Vibrio species from wild marine shrimp, Penaeus monodon and to study its effect on the probiotic feed supplemented organism, when artificially in infected. Biochemical changes during infection of Vibrio parahamolyticus was evaluated by studying the Superoxide dismutase activity and catalase activity after infection. The superoxide dismutase activity and catalase activity in hepatopancreas was estimated in prawns from all the three feed groups. There was significant variation in the SOD activity and catalase activity in all three groups, after 30 days of feeding, uniformly they recorded gain in the activity. The SOD activity was 2.65 in control animals, 5.8 in B. coagulans supplemented animals, and 4.4 in B. firmus supplemented animals and catalase activity was 15.8 in control animals, 29.0 in B. coagulans supplemented animals, and 26.3 in B. firmus supplemented animals. The presence of this B. coagulans and B. firmus could protect the aquatic animals against the infection by pathogenic bacteria and might be applied as good probiotics in aquaculture.
Źródło:
World Scientific News; 2016, 44; 224-235
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dodonaea viscosa Linn used disease by Irula tribes Kanchipuram District Tamil Nadu, India
Autorzy:
Nandakumar, R.
Rajikannun, M.
Kalaiselvan, D.
Sirkanth, G.
Kumar, P.
Powiązania:
https://bibliotekanauki.pl/articles/1177761.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Dodonaea viscosa
Irula tribes
traditional medicine
Opis:
India is known for its rich flora and fauna, diverse climatic areas and wealth of living ethno medicinal plant using the tradition. The paper enumerates medicinal plants used by Irula tribes Kanchipuram district, Tamil Nadu. The traditional practises of three medicinal plants belonging to three families are obtainable with botanical name, family, local name, parts used, method of groundwork and ethno pharmaceutical uses. Medicinal plants were the richest source of India with many traditional uses. Numerous of the pharmacological and pharmacognostical studies of the medicinal plants shown their active application in the field of medicine as they possess certain nutrient and non-nutrient substances that protects and precludes the body from many diseases. They attain a great helpfulness in the present world due to the side effects of the manmade drugs on the human life. Dodonaea viscosa Linn. is an evergreen woody perennial shrub with a native of Australia, indigenous and was later wide spread throughout the region of tropics. Various plant parts such as stem, leaves, seeds, roots, bark and aerial parts were used as the antibacterial, analgesic antiviral, anti-inflammatory, antiulcer and antioxidant agent in traditional system of medicine.
Źródło:
World Scientific News; 2018, 100; 99-109
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Autosomal DNA Polymorphisms of Four South India Tribal Populations
Autorzy:
Deva, A.
Nandakumar, R.
Raghu, P.
Prabhakaran, K.
Powiązania:
https://bibliotekanauki.pl/articles/1190117.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Tribal
Dravidian
Genome Diversity
Heterozygosity
Autosomal Markers
Opis:
Background: The entry and dispersal of modern humans is India of remains unclear and extending with many interesting evidences South India, assumed to be a major corridor for their with many ancient genetic deposits such as Dravidian tribal with Negrito features. As the relationships between the genetic polymorphs and diseases in human being revealed globally, it is worthy to investigate the genomic architecture of population in south India. Objective: To examine what evolutionary forces have most significantly impacted south Indian tribal genetic variation, and to test whether the phenotypic similarities of some south Indian tribal groups to Africans represent a signature of close relationship to Africans or are due to convergence. Methods: Blood samples from 193 unrelated individuals of both sexes are drawn from the Dravidian tribal settlements of Tamil Nadu and Kerala. South India are genotyped for four Aluindel (Alu FXIIIB, Alu ACE, AluTA25 and Alu PLAT) allele profile by PCR genotyping method. Results: All loci are highly polymorphic and average heterozygositiesare substantial (range: 0.37-0.44). Genetic differentiation is high (Gst = 3.7%) in all the study populations.
Źródło:
World Scientific News; 2016, 35; 62-72
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Association of ACE DD genotype with Hypertension among the tribal populations of South India
Autorzy:
Paramasivam, R.
Nandakumar, R.
Arumugam, D.
Krishnan, P.
Powiązania:
https://bibliotekanauki.pl/articles/11010.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Opis:
The Renin-Angiotensin System (RAS) is an important regulator of the blood pressure(BP). The level of the vasoactive peptide Angiotensin-II, is mainly determined by the RAS enzyme, angiotensin converting enzyme-1 (ACE-1). Polymorphisms in ACE gene is reported to be associated with hypertension in various populations worldwide. We investigated the association of ACE I/D polymorphisms with hypertension among the tribal populations of South India. Samples were collected from hypertensive patients (n = 33) and healthy controls (n = 37). Genotyping was performed using Polymerase chain reaction (PCR) with allele specific primers. The DD genotype is significantly observed among the cases (OR = 1.0) . Specifically, the DD genotype is more evident among the females (OR = 0 .705) than males (OR = 1.22) and is analysed to be associated with hypertension among the tribal populations of South India.
Źródło:
International Letters of Natural Sciences; 2016, 52
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A study on the lip print pattern of Naga tribes
Autorzy:
Kiewhuo, Magdalene
Nandakumar, R.
Powiązania:
https://bibliotekanauki.pl/articles/1031852.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Cheiloscopy
Lip prints
Nagas
identification
Opis:
Cheiloscopy is a forensic investigation technique that deals with the identification based on lip traces. Based upon the research, it was established that the arrangement of lines on the red part of human lips is unique for each human being. The present study is an attempt to determine the pattern of lip prints and evaluate its uniqueness in a sample of Naga population and also their association with print in the four quadrants of the lip. A total of 100 (15-40) years individuals were randomly selected. With the help of brush a layer of lipstick was applied on the lips of the subject. Following the basis of Tsuchihashi’s classification the lip prints collected were studied. It was found that Type I’ pattern was predominant among the studied subjects followed by Type I and Type III pattern while Type V pattern was the least frequent Lip pattern distribution in (all four quadrants) in both males and females of Nagas. It is found that no two or more persons had similar features of lip grooves. The frequency of repetition of the lip print pattern in successive quadrant is found to be high. Lip print pattern can be used as an additional tool for personal identification.
Źródło:
World News of Natural Sciences; 2020, 30, 2; 117-124
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-12 z 12

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