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Wyświetlanie 1-15 z 99
Tytuł:
Hypothesis of Selected Mendelian Traits Among Random Asian Population
Autorzy:
Gayathri Upeksha Amarakoon, A. A. D.
Powiązania:
https://bibliotekanauki.pl/articles/1179198.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Hitchhiker’s thumb
Mid digital hair
Toung rolling
Widow’s peak
Opis:
This discusses the prospects for understanding the genetic basis of few selected traits in humans. Phylogenetic analysis provides a path to identify genes and biological processes underlying any trait influenced by inheritance. We suggest that different experimental approaches should be undertaken for traits caused by common genetic variants versus those arising from rare genetic variants. We discuss the intellectual foundations of genetic of Mendelian traits in humans by examining the degree of freedom of four particular factors , namely toung rolling (1.307), hitchhiker’s tumb (3.22), widow’s peak (44.825) and mid digital hair (92.825).
Źródło:
World Scientific News; 2017, 83; 216-223
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Emerging and detection of Dengue viral infection in Sri Lanka
Autorzy:
Amarakoon, A. A. D. Gayathri Upeksha
Powiązania:
https://bibliotekanauki.pl/articles/1188088.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
IgG
RT-PCR
IgM
acute infection
Aedes mosquitos
Opis:
Emerging of dengue infection has increased dramatically in Sri Lanka in recent years. Initial infection with a particular serotype is known as primary infection which is usually asymptomatic or mild disease manifestations. Although cross reactive T cells and cross reactive antibodies have been shown to contribute to disease pathogenesis, these mechanisms alone do not explain the immune - pathological mechanisms leading to severe infection. However, this study has suggested that antigen antibody detection and viral RNA detection in host blood contribute to the occurrence of disease. Therefore, it is important to further investigate the quality of dengue specific immune responses and confirmation of dengue RNA content in patients with acute severe dengue and asymptomatic dengue infection.
Źródło:
World Scientific News; 2016, 56; 97-109
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Detection of C677T & A1298C mutations within the MTHFR gene by PCR and RFLP assays and assessment of risk factor of Hyperhomocysteinemia
Autorzy:
Amarakoon, A. A. D. Gayathri Upeksha
Fernandopulle, Neil
Powiązania:
https://bibliotekanauki.pl/articles/1182887.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
mthfr gene
dna methylation
hyperhomocysteinemia
Opis:
The MTHFR gene within the human genome, codes for the synthesis of Methylenetetrahydrofolate Reductase enzyme, which reduces 5,10-Methylenetetrahydrofolate to 5-Methyltetrahydrofolate, which in turn, is the major circulatory form of folate in the blood. Folate, in this form, among it’s other functions, is involved in reducing the homocysteine levels in the blood, whose elevated levels lead to Hyperhomocysteinemia, causing various major disorders. Mutations within the gene lead to impairment of gene function, in turn causing the homocysteine levels to rise. The C677T and A1298C mutations are the main causative agents for MTHFR gene disruption. During the course of the project, a total of 79 samples were analyzed for the presence of these mutations. The blood samples were first subjected to PCR, giving two separate DNA fragments each responsible for either of the conditions. The fragments were then subjected to RFLP analysis to detect the mutations. The results were finally given with respect to the risk factor faced by each individual based on a molecular diagnostic point of view.
Źródło:
World Scientific News; 2016, 53, 3; 253-274
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quality control test of conventional X-Ray systems in Delta State, South-South, Nigeria
Autorzy:
Ijabor, B. O.
Nzotta, C. C.
Omojola, A. D.
Powiązania:
https://bibliotekanauki.pl/articles/1193452.pdf
Data publikacji:
2021
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Digital Radiography (DR)
Focus to Image Distance (FID)
Half Value Layer (HVL)
Practical Peak Voltage (PPV)
Quality Assurance
Quality Control
Silicon Photodiode
Opis:
The quality assurance (QA) and quality control (QC) programmes of imaging equipment are key ingredients of a quality system. This study is aimed at measuring X-Ray machine parameters and comparing them with the American Association of Physicists in Medicine (AAPM) report No. 74. Also, this study made comparison with similar articles locally and internationally. The study was conducted in 12 X-Ray unit (A-L) located in Delta State. A MagicMax Universal Basic Unit was used alongside an XR Multidetector (silicon photodiode) to measure dose, dose rate, practical peak voltage (PPV), exposure time, current in milliampere (mA) and quantity (Q) in milliampere seconds (mAs). The XR Multidetector was positioned at 100 cm from the focus to image distance (FID) to make most measurements. Six (6) X-Ray units were above 20 years, accounting for 50% of the total X-Ray units used. 30% of X-Ray units > 20 years failed the QC test, which was 2.3 times higher than X-Ray units < 10 and 10-20 years respectively. On the average, 55% pass mark was achieved in the 12 X-Ray units across the state, while 26.11% of the test could not be done due to bad knobs and other challenges. Two (2) X-Ray units with an average age of 3 years, passed all the test. The study showed that many of the X-Ray units were old and certain machine parameters could not be assessed. The study also reveal that most X-Ray specifications manual were either misplaced or missing. Continuing QC programme is highly recommended in the studied areas.
Źródło:
World Scientific News; 2021, 157; 140-153
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparative analysis of Yellow Head Virus (YHD) diagnostic methods adopted in Sri Lanka to investigate the accuracy and specificity of the virus
Autorzy:
Amarakoon, A. A. D. Gayathri U.
Wijegoonawardane, P. K. M.
Powiązania:
https://bibliotekanauki.pl/articles/1182758.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Aquaculture
OIE
Penaeus monodon
RNA
Yellow head virus
Opis:
Yellow head virus is a common viral pathogen which infects cultured Penaeus monodon world-wide, resulting in immature larvae and the growth retardation. Therefore, several detection methods are recommended by the Office des Epizootics (OIE) for use in Asia including Sri Lanka. This study was attempted to evaluate the RT-PCR diagnostic method is the appropriate and accurate YHV detection method which is recommended by the OIE comparing with histological identification and haemolymph Smear method. A total of 150 individuals of Penaeus monodon, post larve samples obtained from different shrimp hatcheries located in Northwestern province were screened for the presence of YHV and the results were comparatively analyzed with three different protocols, namely wet mount observation, histopathological observation and RT- PCR detection. Highest prevalence was recorded with wet mount observations (78%) and the lowest was recorded using histopathology (22%). Comparison of PCR tests generated consisted of positive samples 31/51 (2010), 38/65(2011) and 18/34 (2012) respectively. The results obtained with the IQ2000 commercial kit, were the most reliable and it indicated 56.6% average prevalence of YHV.
Źródło:
World Scientific News; 2017, 66; 181-192
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Growth performance and haematology of broiler chickens fed diets with graded sweet potato (Ipomoea batatas) leaf meals
Autorzy:
Unigwe, C. R.
Ononogbu, C. E.
Adejuyigbe, A. D.
Abonyi, F. O.
Powiązania:
https://bibliotekanauki.pl/articles/1188082.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Broilers
FCR
growth
haematology
PER
sweet potato leaf meal
Opis:
A total of 60 Russ 2011 two weeks old broiler chicks with an average weight of 215.33+4.55g were fed with diets compounded with sweet potato leaves (SPL) for 56 days. The diets consist of T1 (0% SPL), T2 (5% SPL), T3 (10% SPL) and T4 (15% SPL). The proximate composition of the SPL was determined in the laboratory. The birds were randomly allocated to four treatments using completely randomized design (CRD). Each treatment was subdivided into three replicates of five chicks each. At the end of the experiment, all data collected were subjected to one way analysis of variance and difference in means was separated using Duncan’s New Multiple Range Test. The results showed no significant difference (p>0.05) in the average body weight gain, feed intake, feed conversion ratio (FCR) and protein efficiency ratio (PER). However, birds on T2 (32.77g) had the best daily body weight gain followed by T4 (30.36g), T3 (30.06g) and T1 (29.21g) while in terms of daily feed intake, T4 (98.20g) consumed most followed by T2 (98.17g) and T3 (96.59g) whereas, T1 (92.38g) consumed the least feed. The birds on T2 (3.00) demonstrated the best FCR followed by T1 (3.16), T3 (3.21) and T4 (3.23). Also T1 (1.59) showed the best PER closely followed by T1 (1.53), T3 (1.46) and T4 (1.43). There was, however, a significant difference (p<0.05) in Hb concentration when T2 (11.62g/dl) and T3 (12.48g/dl) were compared with T1 (10.34g/dl) and T4 (10.21g/dl). In the PCV, a statistical difference (p<0.05) also was observed between T1 (24.73%) and others (T2 (28.18%), T3 (28.97%)and T4 (27.14%)) while similar trend (p<0.05) was seen in the RBC count when T4 (9.72x106/ul) was compared with T1 (10.21 x106/ul), T2 (10.81x106/ul) and T3 (11.43x106/ul) and no significant difference (p>0.05) among all the treatments with respect to WBC (T1 (21.23x103/ul), T2 (19.18x103/ul), T3 (21.26x103/ul) and T4 (22.63x103/ul)). Although the haematological parameters fell within normal physiological ranges, there was a gradual increase in these values as the inclusion levels progressed till T3 (10% inclusion) and then a decrease. It is therefore recommended that inclusion of SPL up to 5% in the diet of broilers is good for enhanced body weight gain, FCR and PER and up to 10% for enhanced haematological parameters.
Źródło:
World Scientific News; 2016, 56; 45-55
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of entrance skin dose and effective dose from abdomen radiography in two diagnostic facilities in Aba, Abia State, South-East Nigeria
Autorzy:
Esu, E. O.
Chiegwu, H. U.
Omojola, A. D.
Eze, E. M.
Powiązania:
https://bibliotekanauki.pl/articles/1839405.pdf
Data publikacji:
2021
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Entrance skin dose (ESD)
Local diagnostic reference levels (LDRLs)
Dose area product (DAP)
Effective dose (E)
Absorbed dose (DT)
Thermoluminescent dosimeter (TLD)
Kilovoltage peak (kVp)
milliampere-seconds (mAs)
Opis:
Medical exposure for abdomen radiography is associated with higher doses compared to X-Rays of the chest and other extremities. The study aims to determine the mean entrance skin dose (ESD) for 104 adult patients between 20-89 years with 2 X-Ray units (A and B) in Aba, South-East Nigeria and to determine the ESD at the 75th percentile to estimate the local diagnostic reference levels (LDRLs). This study also determined the effective dose (E), the dose area product (DAP) and the relationship between absorbed dose (DT) and other parameters. This study will also compare its findings with relevant articles where necessary. The study used 2 functional floors mounted X-Ray units. A total of 208 annealed thermoluminescent dosimeters (TLDs) were used made of Lithium Fluoride, doped with Magnesium and Titanium (LiF: Mg, Ti). Two TLD chips were used per patient. The chips were positioned at the anterior and posterior end of the patient respectively for a given beam area for abdomen radiography. After exposure, a calibrated RadPro TLDcube 400 reader (Freiberg Instrument, Germany) was used to estimate individual patient doses. This was done by multiplying the TLD counts by a pre-determined calibration factor (CF). The mean/75th percentile ESD for facilities A and B was 2.92/4.12 and 3.01/3.67 mGy. The E for facilities A and B was 0.73 and 0.82 mSv respectively. There was a good relationship between the DT with ESD, exit dose (ED) and DAP for facility A, but no relationship was seen with other parameters. The mean ESD was lower compared to the National Council on Radiation Protection and Measurements (NCRP 172) and the American Association of Physicists in Medicine (AAPM) reports respectively. The study proved useful and could serve as a reference point to initiate LDRLs within the South-East zone in Nigeria for abdomen radiography.
Źródło:
World Scientific News; 2021, 161; 143-156
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theoretical Model for the Effect of Temperature on the Fluorescence Spectrum of Laser Dye (Rh6G) in Acetone
Autorzy:
Al-Kadhemy, M. F. H.
Al-Zuky, A. A. D.
Daear, H. F.
Powiązania:
https://bibliotekanauki.pl/articles/412140.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
laser dye
Rhodamine 6G
Fluorescence Spectrum
effect of temperature
theoretical model
Opis:
In this research, the effect of temperature change on the fluorescence intensity for Rhodamine 6G (Rh6G) in acetone from room temperature to freezing point of solvent by using liquid nitrogen was studied experimentally and theoretically. As we have noted that the increased temperature led to less intensity and increasingly broader spectrum. We estimate theoretical model for this effect, and the theoretical equation was Extra Val equation.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 19, 2; 151-159
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Detection and Prevalence of white spot syndrome disease (WSSV) in shrimp farms
Autorzy:
Amarakoon, A. A. D. Gayathri U.
Wijegoonawardane, P. K. M.
Wicraamasinghe, W. A. L.
Powiązania:
https://bibliotekanauki.pl/articles/1188101.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
WSSV
DNA genome
OIE
Penaeid shrimps
Nested PCR
Opis:
White spot syndrome is a viral infection of Penaeus monodon shrimp. It is highly lethal, contagious and killing shrimps and doesn’t have a specific anti-viral treatment for this infection. This important infection affects on shrimp farms in Sri Lanka and leads to the loss of economy. Most of shrimp products are export oriented. Therefore this study aimed to determine the factors, detection and prevalence of WSSV in shrimp farms, Sri Lanka. The prevalence rate of WSSV among the collected samples (n = 100) is 58.05% (2011), 59.06% (2012) in Sri Lanka respectively. Therefore the infection and resistance of virus has increased among the shrimp population annually. Further studies need to be identified the WSSV aggressive viral strains and prevention strategies to evade from this sever infection in shrimp farming.
Źródło:
World Scientific News; 2016, 56; 239-251
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An overview of Human Papilloma Virus
Autorzy:
Amarakoon, A. A. D. Gayathri Upeksha
Daulagala, S. W. P. L.
Fathima, Fara
Powiązania:
https://bibliotekanauki.pl/articles/1182889.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Papilloma virus; cervical cancer; RNA genome; control region
Opis:
Cervical cancer is the second commonest cause of cancer among women. According to the World Health Organization (WHO) data, in 2006 there were 1.4 million women who were suffering from cervical cancer and 80% of deaths among them were of women from developing countries. Genital infection with Human Papilloma Virus (HPV) is one of the major etiological factors for developing cervical cancers in almost all countries (World Health Organization, 2005). Papilloma viruses were first identified, cloned and sequenced from cervical tumor specimens and were subsequently established as important causative agents for the development of cervical cancer. Differences in prevalence rates are observed worldwide. Infection is more common in sexually active young women of 18-30 years and a reduction in acquisition of infection is observed after 30 years. The situation of Cervical cancer in Sri Lanka is identified as the second most common cancer among women in Sri Lanka and approximately 7.74 million women are included in the risk category. It is reported that nearly 850 die from cervical cancer each year.
Źródło:
World Scientific News; 2016, 53, 3; 275-308
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Molecular Phylogenetic relationships among the species of geckos in Adams’peak in Sri Lanka
Autorzy:
Amarakoon, A. A. D. Gayathri U.
Fernandopulle, Neil
Daulagala, S. W. P. L.
Powiązania:
https://bibliotekanauki.pl/articles/1191243.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Geckos species
Adams peak
lizard tails
RAG1gene
Opis:
In the current study we attempt to identify the relationship of among geckos species that are surviving in Adam’s peak Sri Lanka. A ten month survey was undertaken to document the diversity and abundance of geckos at the Adam’s peak in Sri Lanka. By using molecular data, the aim was to genetically characterize the species of geckos occurring along directions in Adam’s peak and phylogenetically relate these to other different parts of the world. A total of 79 individuals of gecko’s tails and eggs were captured in four different areas in Adam’s peak. We use 373 bp of RAG1 to detect the gene location and DNA sequence data to recover phylogenetic relationships and elucidate a biographic pattern and close relationship among geckos. According to the morphological identification suggested that gecko’s tail specimens belonged to several species and the molecular detection method confirmed the gene pool is differentiated among the population. Analysis of sequences of the RAG1 region from gecko species confirmed that the samples belonged to family Gekkonidae with the different gene population.
Źródło:
World Scientific News; 2016, 54; 180-190
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Extractive Spectrophotometric Determination of Pd(II) with Sodium salt of hexamethyleneiminecarbodithioate
Autorzy:
Dhanavate, S. D.
Garole, D. J.
Garole, V. J.
Tetgure, S. R.
Sawant, A. D.
Powiązania:
https://bibliotekanauki.pl/articles/412252.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
palladium
sodium hexamethyleneiminecarbodithioate
Extractive Spectrophotometry
synthetic mixture
Real Samples
Opis:
The reagent NaHMICdt•2H2O has found to be a good chelating agent for the spectrophotometric determination of various metal ions. The present investigation deals with spectrophotometric determination of Pd(II) by using NaHMICdt•2H2O. The reagent reacted with Pd(II) to give yellow complex extractable into toluene. Pd (II) was extracted quantitatively in the pH range 0.5-2.0. Pd(II)-HMICdt complex showed λmax at 435 nm. The extracted species has a 1:2 (M:L) stoicheometry. Beer’s law is obeyed in the range of 0.2-0.8 μg ml-1 of Pd (II). The molar absorptivity and the sandells sensitivity were found to be 0.754 x 104 lmol-1cm-1 and 0.0140 μg mol-1 cm-2 respectively. The effect of divers ion on the extraction of Pd(II) has been investigated. The proposed method is highly sensitive, selective, and simple and rapid has been applied for accurate determination of palladium in synthesis mixtures and real samples.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 4; 20-28
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Investigative Study of Modest Fashion: The case of the Western and Central Provinces of Sri Lanka
Autorzy:
Ranathunga, G. M.
Dewpura, D. A. R. D. L.
Powiązania:
https://bibliotekanauki.pl/articles/1167062.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Dress
Islamic Women
Modest Fashion
Opis:
A fashion trend is emerging in Islamic culture based on the concept of modest fashion all over the world. Significant brands of the Western fashion world have already launched their Hijab and Abaya lines. The objective of the present research is to investigate the important factors of modest fashion in the Islamic culture and to detect the future world fashion trends of Islamic fashion and then to appliance the concept of modesty to the fashion market of Sri Lanka. This investigative study is based on the qualitative and questionnaire-based methods. The study is confined to questionnaires which were distributed among a sample of 150 Muslim women with diverse backgrounds to gather data and statistics around Colombo and Kandy. Secondary data were collected from books, articles, web sites and visual data such as pictures and photographs which facilitated to forward a successful research. Examination of the influence of culture on Muslim women’s dress etiquettes led to understand what Muslim women expect from their dress and led to identify potential opportunities in the contemporary market of modest fashion.
Źródło:
World Scientific News; 2018, 105; 182-196
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative study for the defluoridation of water by Coagulation
Autorzy:
Atia, D.
Hoggui, A.
Abdelhafidh, D. B. A.
Powiązania:
https://bibliotekanauki.pl/articles/412421.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
fluorine
defluoridation
drinkable water
coagulation
Opis:
El-Oued is known for some diseases caused by fluoride concentration in drinkable water. To reduce it, we have chosen a sample with the highest content of fluoride among many sources in order to coagulate it with Al2(SO4)3ź18H2O, Fe2(SO4)3źH2O and FeSO4. In order to get better reduction yield of fluoride, a study has been done on the influencing parameters (concentration, pH, temperature) to choose the best conditions. The remove of fluoride is favorable at low concentration of Al2(SO4)3, at room temperature and normal acidity.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 8, 2; 123-131
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Minimizing fluoride by coagulation on iron(III) hydroxide in drinkable water from Oasis region of Algeria
Autorzy:
Atia, D.
Hoggui, A.
Powiązania:
https://bibliotekanauki.pl/articles/411515.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Oasis region
minimizing fluoride
fluorosis
coagulation
drinkable water
Opis:
The drinkable water in oasis region of Algeria contains high quantity of fluoride which causes dental fluorosis. To reduce fluoride, we have chosen a sample with the biggest content of fluoride among many sources in order to coagulate it with FeSO4·H2O. After that the parameters influencing (concentration, pH, temperature) are studied to choose the best conditions for better reduction.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 7, 1; 23-29
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 99

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