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    Wyświetlanie 1-32 z 32
    Tytuł:
    Involvement of phenolics, flavonoids and phenolic acids in high yield characteristics of rice (Oryza sativa L.)
    Autorzy:
    Xuan, T.D.
    Bach, D.T.
    Dat, T.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/11449.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Źródło:
    International Letters of Natural Sciences; 2018, 68
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Factors promote germination and initial growth of Monochoria vaginalis
    Autorzy:
    Xuan, T.D.
    Anh, L.H.
    Minh, T.N.
    Khanh, T.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/10926.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Źródło:
    International Letters of Natural Sciences; 2016, 59
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Where have all the fleas gone? Low levels of blue tit Parus caeruleus nests infestation
    Autorzy:
    Kedra, A H
    Mazgajski, T.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/837437.pdf
    Data publikacji:
    1999
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    parasite
    Blue tit
    bird
    nest
    flea
    tit
    Parus caeruleus
    infestation
    Opis:
    Prevalence of flea infestation in nests of Blue Tit Parus caeruleus was analyzed and compared with these of other hole-nesting birds. Nests were collected from nestboxes prior to youngs fledging. It was found that prevalence of fleas was very low in comparison to other studies of Blue Tits nests and to other bird species. The possible reasons of this low prevalence are discussed.
    Źródło:
    Annals of Parasitology; 1999, 45, 4
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of tillage practices and farmyard manure on rice Oryza sativa L. and water storage capacity of upland inceptisols of Bastar Plateau in India
    Autorzy:
    Pandey, T.D.
    Thakur, D.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/8882060.pdf
    Data publikacji:
    2003
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Tematy:
    tillage practice
    farmyard manure
    rice
    Oryza sativa
    water storage
    upland inceptisol
    Bastar plateau
    India
    Źródło:
    Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura; 2003, 58; 185-191
    0365-1118
    Pojawia się w:
    Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Parasites of chaffinch [Fringilla coelebs] population. Part I. Coccidia [Protozoa, Apicomplexa]
    Autorzy:
    Gryczynska, A
    Dolnik, O.
    Mazgajski, T.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/839803.pdf
    Data publikacji:
    1999
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    parasite
    bird
    Fringilla coelebs
    chaffinch
    Mazurian Lakeland
    Protozoa
    Coccidia
    population
    Apicomplexa
    Opis:
    Coccidia infection in Chaffinch population in Mazurian Lakeland was studied. Birds were caught in mist nets from June to September and droppings were collected after defecation. Prevalence of infection was high - 80% of Chaffinches excreted oocysts of Isospora sp. Intensity of oocysts' production varied depending on the time of the day and therefore coccidia prevalence in Chaffinch should be best detectable in birds caught after midday.
    Źródło:
    Annals of Parasitology; 1999, 45, 4
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of lactic acid on alfa-amylase activity and phytic acid content in germination of rice (Oryza sativa L.)
    Autorzy:
    Thi Thu Ha, P.
    Xuan, T.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/11420.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Źródło:
    International Letters of Natural Sciences; 2018, 67
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Changes in chemical composition, total phenolics and antioxidant activity of Alpinia (Alpinia zerumbet) leaves exposed to UV
    Autorzy:
    Xuan, T.D.
    Khanh, T.D.
    Khang, D.T.
    Quan, N.T.
    Elzaawely, A.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/10809.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Opis:
    Alpinia zerumbet (Pers.) B.L. Burtt. & R.M. Sm is an important perennial ginger plant in the tropics with various uses as foods, dietary supplement, cosmetics, essential oil production and traditional medicines. In this study, essential oils, phenolic acids, fatty acids, kavains, total phenols and antioxidant activity in A. zerumbet plants exposed to UV-C were investigated. Number and weights of essential oils increased rapidly from 1 to 3 days of exposure. Major extend of essential oils was recorded in methyl cinnamate and followed by benzyl acetone. The correspondence to the accumulation of palmitic acid was 15 folds, in contrast to the strong reduction of stearic quantity was 10 folds at 3 days of treatment. Changes in chemical components and antioxidant capacity in A. zerumbet are differed reversely between the exposure of UV-C and heavy toxic chemicals. The exposure of UV-C is beneficial for the increasing of essential oil production in A. zerumbet.
    Źródło:
    International Letters of Natural Sciences; 2016, 55
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Parasites of chaffinch [Fringilla coelebs] population. Part 2. Blood parasites
    Autorzy:
    Pawelczyk, A
    Gryczynska, A.
    Mazgajski, T.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/841547.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    parasite
    Fringilla coelebs
    chaffinch
    parasitic infection
    Haemoproteus
    blood parasite
    population
    seasonal dynamics
    Opis:
    Blood parasites of Chaffinches caught from June to October near Łuknajno Lake (Mazurian Lakeland) were studied. Only parasites belonging to the genera Haemoproteus were found. A decrease in prevalence as the season progressed was observed. No differences in blood parasite infections in relation to the sex of the birds were found. Also males body weight was not affected by the presence of parasites.
    Źródło:
    Annals of Parasitology; 2003, 49, 1
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Parasites of chaffinch [Fringilla coelebs] population. Part 2. Blood parasites
    Autorzy:
    Pawełczyk, A.
    Gryczyńska, A.
    Mazgajski, T.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2147618.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    parasite
    Fringilla coelebs
    chaffinch
    parasitic infection
    Haemoproteus
    blood parasite
    population
    seasonal dynamics
    Opis:
    Blood parasites of Chaffinches caught from June to October near Łuknajno Lake (Mazurian Lakeland) were studied. Only parasites belonging to the genera Haemoproteus were found. A decrease in prevalence as the season progressed was observed. No differences in blood parasite infections in relation to the sex of the birds were found. Also males body weight was not affected by the presence of parasites.
    Źródło:
    Wiadomości Parazytologiczne; 2003, 49, 1; 31-38
    0043-5163
    Pojawia się w:
    Wiadomości Parazytologiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Antioxidant status and hepato-protective role of Anchomanes difformis in streptozotocin-induced diabetes in male Wistar rats
    Autorzy:
    Alabi, T.D.
    Brooks, N.L.
    Oguntibeju, O.O.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049053.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Włókien Naturalnych i Roślin Zielarskich
    Tematy:
    Anchomanes difformis
    antioxidants
    diabetes
    hyperglycaemia
    hyperlipidaemia
    liver
    antyoksydanty
    cukrzyca
    hiperglikemia
    hiperlipidemia
    wątroba
    Opis:
    Introduction: The liver is involved in the metabolism of xenobiotics and their metabolites and it is vulnerable to oxidative damage. Hyperglycaemia is highly implicated in the progression of diabetes mellitus, and adversely affects the liver. Though, conventional hypoglycaemic drugs may be effective in reducing blood glucose, they do not appear to be effective in attenuating the progression of diabetes and its complications. Objective: This study evaluated the ameliorative effects of Anchomanes difformis on hyperglycaemia and hepatic injuries in type 2 diabetes. Methods: Type 2 diabetes was induced in male Wistar rats with a single intraperitoneal injection of streptozotocin (40 mg/kg BW) after two weeks of fructose (10%) administration. Aqueous extract of A. difformis (200 and 400 mg/kg BW) and glibenclamide (5 mg/kg BW) were administered orally for six weeks. Blood glucose concentrations were measured. Serum levels of liver dysfunction markers (ALT, AST, and ALP), total cholesterol, triglycerides, HDL- and LDL-cholesterol were investigated. Total protein, albumin, and globulin were also assessed. Antioxidant parameters: ORAC, GSH, GSSG, SOD, CAT and FRAP were evaluated in the liver while ORAC, FRAP and lipid peroxidation were determined in the serum. Histological examination of the liver tissue was carried out. Results: Treatment with aqueous extract of A. difformis significantly (p<0.05) reduced blood glucose and reversed steatosis in the diabetic-treated rats. The antioxidant status of diabetic-treated rats was significantly (p<0.05) improved. Serum levels of liver dysfunction markers were significantly (p<0.05) reduced in diabetic-treated rats. Conclusion: The findings in this study revealed that 400 mg/kgBW Anchomanes difformis was more effective than 200 mg/kg BW in ameliorating diabetes-induced hepatopathy, however, both doses of Anchomanes difformis demonstrated more antidiabetic ability than glibenclamide. Anchomanes difformis may be a novel and potential therapeutic agent in the management of diabetes and resulted hepatic injuries.
    Źródło:
    Herba Polonica; 2020, 66, 1; 18-36
    0018-0599
    Pojawia się w:
    Herba Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of rice blast fungus (Pyricularia grisea) on phenolics, flavonoids, antioxidant capacity in rice (Oryza sativa L.)
    Autorzy:
    Toan, N.P.
    Ha, P.T.T.
    Xuan, T.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/11633.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Źródło:
    International Letters of Natural Sciences; 2017, 61
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Antioxidant activity, quality parameters and grain characteristics of rice varieties of Afghanistan
    Autorzy:
    Rayee, R.
    Xuan, T.D.
    Kakar, K.
    Haqani, M.I.
    Powiązania:
    https://bibliotekanauki.pl/articles/11136.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Źródło:
    International Letters of Natural Sciences; 2019, 73
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A large extinct marabou stork in African Pliocene hominid sites, and a review of the fossil species of Leptoptilos
    Autorzy:
    Louchart, A
    Vignaud, P.
    Likius, A.
    Brunet, M.
    White, T.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/22950.pdf
    Data publikacji:
    2005
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Ethiopia
    Ciconiidae
    new fossil
    Aves
    fossil
    Leptoptilos falconeri
    Chad
    Africa
    Asia
    Pliocene
    paleontology
    Opis:
    New fossils of the family Ciconiidae from Pliocene hominid localities in Chad and Ethiopia are described, and several are shown to belong to Leptoptilos falconeri, originally known from the late Pliocene of the Siwalik Hills of India. Comparisons with all the hitherto known species of large Ciconiidae, and with an enlarged sample representing extant species, lead to a re−evaluation of some extinct taxa. Several synonymies are proposed, reflecting better the past diversity for this group. L. pliocenicus (Pliocene, Ukraine) is equivalent to L. cf. falconeri. Cryptociconia indica (late Pliocene, Siwalik Hills) belongs to Leptoptilos, and is probably either extant L. dubius or female L. falconeri. L. siwalicensis, from the same locality and also tentatively reported from the late Miocene of Northern Pakistan, is better referred to as Leptoptilini gen. et sp. indet. We consider the two following species as valid. L. titan (Pleistocene, Java) may be a late offshot of the lineage of L. falconeri. L. richae (late Miocene, Tunisia) is the size of L. crumeniferus, and is distinct from L. falconeri. Thus, L. falconeri remains the only ascertained extinct Pliocene species in the tribe Leptoptilini. It was a widespread “giant” marabou stork, in the Pliocene of southern Asia, as well as northern and eastern Africa where it coexisted with different Pliocene hominids, and probably eastern Europe. It weighed up to about 20 kg, reached 2 m in height, and had probably slightly reduced forelimbs. It became extinct by the end of the Pliocene. L. falconeri is an example of a biogeographical link at the species level between the African and Eurasian faunas in the Pliocene. The fossil record indicates the presence of at least one other lineage in Africa since the early Miocene, similar in size to the extant L. crumeniferus.
    Źródło:
    Acta Palaeontologica Polonica; 2005, 50, 3
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of ursolic acid as the main component isolated from Catharanthus roseus against hyperglycemia
    Autorzy:
    Thanh Tam, N.
    Thien, D.D.
    Sung, T.V.
    Thi Hoang Anh, N.
    Thuy, T.T.
    Trung, K.H.
    Xuan, T.D.
    Khanh, T.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/10779.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Opis:
    Ursolic acid with large amount (0.67% of dried plant weight) along with 7 compounds, namely as spatozoate (1), kaurenoic acid (2), ursonic acid (3), 3-hydroxy-11-ursen-28,13-olide (4), ursolic acid (5), vindoline (6) and mixture of β-sitosterol and stigmasterol were isolated from dichloromethane and ethyl acetate extracts which have shown anti-glucosidase activity of the whole plant of C.roseus. Some isolated compounds and their derivatives were also tested for anti-glucosidase and cytotoxicity.Ursolic acid was examined for hypoglycemic activity in alloxan-induced diabetic mice with dose of 200 and 300 mg/kg/day, respectively. The results have shown that the blood glucose level were reduced by 45.75% and 51.31% to compare with the control group. This study has confirmed that the main component of Vietnamese C. roseus has had significant anti-hyperglycemia activity.
    Źródło:
    International Letters of Natural Sciences; 2016, 50
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cenomanian-Campanian (Late Cretaceous) mid-palaeolatitude sharks of Cretalamna appendiculata type
    Autorzy:
    Siversson, M.
    Lindgren, J.
    Newbrey, M.G.
    Cederstrom, P.
    Cook, T.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/19990.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Opis:
    The type species of the extinct lamniform genus Cretalamna, C. appendiculata, has been assigned a 50 Ma range (Albian– Ypresian) by a majority of previous authors. Analysis of a partly articulated dentition of a Cretalamna from the Smoky Hill Chalk, Kansas, USA (LACM 128126) and isolated teeth of the genus from Cenomanian to Campanian strata of Western Australia, France, Sweden, and the Western Interior of North America, indicates that the name of the type species, as applied to fossil material over the last 50 years, represents a large species complex. The middle Cenomanian part of the Gearle Siltstone, Western Australia, yielded C. catoxodon sp. nov. and “Cretalamna” gunsoni. The latter, reassigned to the new genus Kenolamna, shares several dental features with the Paleocene Palaeocarcharodon. Early Turonian strata in France produced the type species C. appendiculata, C. deschutteri sp. nov., and C. gertericorum sp. nov. Cretalamna teeth from the late Coniacian part of the Smoky Hill Chalk in Kansas are assigned to C. ewelli sp. nov., whereas LACM 128126, of latest Santonian or earliest Campanian age, is designated as holotype of C. hattini sp. nov. Early Campanian deposits in Sweden yielded C. borealis and C. sarcoportheta sp. nov. A previous reconstruction of the dentition of LACM 128126 includes a posteriorly situated upper lateroposterior tooth, with a distally curved cusp, demonstrably misplaced as a reduced upper “intermediate” tooth. As originally reconstructed, the dentition resembled that of cretoxyrhinids (sensu stricto) and lamnids. Tooth morphology, however, indicates an otodontid affinity for Cretalamna. The root is typically the most diagnostic feature on an isolated Cretalamna tooth. This porous structure is commonly abraded and/or corroded and, consequently, many collected Cretalamna teeth are indeterminable at species level.
    Źródło:
    Acta Palaeontologica Polonica; 2015, 60, 2
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identification of candidate gene SalT and designing markers involving in salt tolerance of Vietnamese rice landraces
    Autorzy:
    Trung, K.H.
    Khoa, N.T.
    Diep, N.T.
    Thuy, T.T.
    Ha, D.T.T.
    Cuong, T.D.
    Xuan, T.D.
    Trung, D.M.
    Toan, N.N.
    Quyen, P.T.
    Linh, L.H.
    Khanh, T.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/11349.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Źródło:
    International Letters of Natural Sciences; 2017, 63
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of salt on growth of rice landraces in Vietnam
    Autorzy:
    Anh, L.H.
    Hue, H.T.
    Quoc, N.K.
    Nghia, L.T.
    Trung, K.H.
    Trung, T.N.
    Trang, D.H.
    Xuan, T.D.
    Khanh, T.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/10833.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Źródło:
    International Letters of Natural Sciences; 2016, 59
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Abundance frequency of plant species as animal feeds to determine ideal cattle grazing
    Autorzy:
    Yulianto, R.
    Xuan, T.D.
    Kawamura, K.
    Lim, J.
    Yoshitoshi, R.
    Xinyan, F.
    Zhe, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/11556.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Opis:
    The objectives of this study were to determine the dominant frequency of plant species, and provide useful information toward the conservation management of animal feed in grazing areas, Hiroshima, Japan. The numbers of plant species were 32 and 21 in spring and summer, respectively. The appearance frequency of plant species more than 50% in the spring, consist of Veronica arvensis (75.57%), Trifolium repens (73.86%), Paspalum dilatatum (69.32%), Lamium purpureum (68.75%), Trifolium dubium (65.34%), Cerastium glomeratum (63.64%), whereas in summer, it consists of Paspalum notatum (98.30%), Trifolium repens (81.25%), Paspalum dilatatum (78.98%), and Kyllinga brevifolia (74.43%). It was observed that the plant high of the plant species were 16.64 and 21.55 cm; vegetation cover rates were 77.18 and 81.36%; chlorophyll content were 41.72 and 36.28 mg/g Fw, and species numbers were 17.91 and 10.18, in spring and summer, respectively. Findings of this research propose that Trifolium repens (clover), Rumex japonicus (weed), and Paspalum dilatatum (grass) are dominant species in the studied areas that can be utilized as animal feeds.
    Źródło:
    International Letters of Natural Sciences; 2016, 58
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identification of Vietnamese Ochna integerrima (Lour.) merr species based on ribosomal DNA internal transcribed spacer sequence
    Autorzy:
    Trang, D.H.
    Van Dong, D.
    Chung, B.H.
    Gioi, D.H.
    Khanh, T.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/11712.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Źródło:
    International Letters of Natural Sciences; 2018, 68
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Photonic band gaps in complex layered arrays
    Autorzy:
    Prosvirnin, S.L.
    Tretyakov, S.A.
    Vasilyeva, T.D.
    Fourrier-Lamer, A.
    Zouhdi, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/309146.pdf
    Data publikacji:
    2001
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    photonic band gap structures
    double-periodic arrays
    reflective and transmitting properties
    Opis:
    Reflective and transmitting properties of several layers of double-periodic arrays are studied. In the arrays, elements are conducting inclusions of various shapes. It is shown that in tbese structures all the phenomena recently found in dense wire grids with periodical defects (so-called photonic band gap structures) can be observed and explained in simple terms of inter-layer and inclusion resonances. Frequency-selective (with two and more stop bands) and polarization transformation properties of these arrays are demonstrated.
    Źródło:
    Journal of Telecommunications and Information Technology; 2001, 4; 48-51
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Vertebral morphology, dentition, age, growth, and ecology of the large lamniform shark Cardabiodon ricki
    Autorzy:
    Newbrey, M.G.
    Siversson, M.
    Cook, T.D.
    Fotheringham, A.M.
    Sanchez, R.L.
    Powiązania:
    https://bibliotekanauki.pl/articles/21003.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    morphology
    dentition
    age
    growth
    ecology
    large lamniform shark
    Cardabiodon ricki
    Cardabiodon venator
    Chondrichthyes
    Lamniformes
    Archaeolamna
    Squalicorax
    Cretaceous
    Cenomanian
    Turonian
    Australia
    Opis:
    Cardabiodon ricki and Cardabiodon venator were large lamniform sharks with a patchy but global distribution in the Cenomanian and Turonian. Their teeth are generally rare and skeletal elements are less common. The centra of Cardabiodon ricki can be distinguished from those of other lamniforms by their unique combination of characteristics: medium length, round articulating outline with a very thick corpus calcareum, a corpus calcareum with a laterally flat rim, robust radial lamellae, thick radial lamellae that occur in low density, concentric lamellae absent, small circular or subovate pores concentrated next to each corpus calcareum, and papillose circular ridges on the surface of the corpus calcareum. The large diameter and robustness of the centra of two examined specimens suggest that Cardabiodon was large, had a rigid vertebral column, and was a fast swimmer. The sectioned corpora calcarea show both individuals deposited 13 bands (assumed to represent annual increments) after the birth ring. The identification of the birth ring is supported in the holotype of Cardabiodon ricki as the back-calculated tooth size at age 0 is nearly equal to the size of the smallest known isolated tooth of this species. The birth ring size (5-6.6 mm radial distance [RD]) overlaps with that of Archaeolamna kopingensis (5.4 mm RD) and the range of variation of Cretoxyrhina mantelli (6-11.6 mm RD) from the Smoky Hill Chalk, Niobrara Formation. The revised, reconstructed lower jaw dentition of the holotype of Cardabiodon ricki contains four anterior and 12 lateroposterior files. Total body length is estimated at 5.5 m based on 746 mm lower jaw bite circumference reconstructed from associated teeth of the holotype.
    Źródło:
    Acta Palaeontologica Polonica; 2015, 60, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Allelopathic activity of dehulled rice and its allelochemicals on weed germination
    Autorzy:
    Khang, D.T.
    Anh, L.H.
    Thu Ha, P.T.
    Tuyen, P.T.
    Quan, N.V.
    Minh, L.T.
    Quan, N.T.
    Minh, T.N.
    Xuan, T.D.
    Khanh, T.D.
    Trung, K.H.
    Powiązania:
    https://bibliotekanauki.pl/articles/11543.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Opis:
    In this study, the allelopathic potential of dehulled rice, rice, and hulls of rice on germination of weeds was evaluated in laboratory. Phenolic acids in growth media of these plants were also identified and quantified using HPLC. Identified allelochemicals were reversely tested for phytotoxic effects on germination and seedling growth of barnyardgrass, lettuce, radish and rice. The results showed that the inhibitory effects of dehulled rice were stronger than those of hulls and rice. Dehulled rice caused 66.7% and 50.6% reduction in radish root length and lettuce shoot height, respectively. Dehulled rice showed strong inhibitory effects on root length of lettuce and shoot height of radish while hulls and rice exhibited stimulation. Regarding phenolic identification, vanillin and vanillic acid were detected as allelochemicals in root exudates of rice and tested plants. The results revealed that most of the vanillin and vanillic acid treatments showed high inhibitory effects on germination rates and seedling growth of lettuce and radish, high stimulatory activity on root elongation of rice. Vanillic acid (100 ppm and 200 ppm), vanillin (100 ppm) and their mixture (200 ppm) completely inhibited survival of lettuce. The findings indicate the allelopathic potential of dehulled rice which can be used for identification of more phytotoxins to produce bioherbicides in agricultural practices.
    Źródło:
    International Letters of Natural Sciences; 2016, 58
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of genetic diversity of local-colored rice landraces using SSR markers
    Autorzy:
    Thi Hue, H.
    Nghia, L.T.
    Minh, H.T.
    Anh, L.H.
    Thi Thu Trang, L.
    Khanh, T.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/11570.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Źródło:
    International Letters of Natural Sciences; 2018, 67
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phenolic compounds and antioxidant activity of Castanopsis phuthoensis and Castanopsis grandicicatricata
    Autorzy:
    Tuyen, P.T.
    Khang, D.T.
    Minh, L.T.
    Minh, T.N.
    Ha, P.T.T.
    Elzaawely, A.A.
    Xuan, T.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/11907.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Opis:
    In this study, total phenolic and flavonoid contents, antioxidant capacity, and phenolic compositions of Castanopsis phuthoensis and Castanopsis grandicicatricata (Fagaceae family) were investigated. It was found that bark extracts were rich of phenolic contents, whereas leaf extracts were abundant of flavonoids. The total phenolics varied from 11.20 to 35.47 mg gallic acid equivalent g-1 dry weight (DW), and the total flavonoids were from 2.24 to 12.55 mg rutin equivalent g-1 DW. The results of antioxidant activity evaluation showed that the DPPH (1,1- diphenyl-2-picryl-hydrazyl) radical scavenging activity of the free phenolic extracts were higher than the bound phenolic extracts. Regarding the reducing power and β-carotene bleaching assays, the free phenolic extracts showed remarkably strong antioxidant capacity that were similar to the levels of the standard BHT (dibutyl hydroxytoluene) did. It could be concluded that free phenolic extracts were more effective in antioxidant activities than bound phenolic extracts. Highly significant correlations were observed between phenolic contents and antioxidant activities (0.813 for DPPH and 0.841 for reducing power). By HPLC analysis, seven phenolic acids were detected including gallic, p-hydroxybenzoic, vanillic, sinapic, p-coumaric, ellagic acids, and vanillin. Of which, gallic, ellagic, and sinapic acids were the most abundant compounds in the two species. The results suggest C. phuthoensis and C. grandicicatricata contain rich sources of natural antioxidants and phenolic compounds which are probably considered in pharmaceutical use.
    Źródło:
    International Letters of Natural Sciences; 2016, 55
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study on physical-chemical characters and heritability for yield components in rice (Oryza sativa L.)
    Autorzy:
    Ha, P.T.T.
    Khang, D.T.
    Tuyen, P.T.
    Minh, T.N.
    Xuan, T.D.
    Lang, N.T.
    Buu, B.C.
    Powiązania:
    https://bibliotekanauki.pl/articles/11628.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Opis:
    Present study was performed to analysis both physical and chemical properties of rice germplasm and heritability for yield components in combinations. A total of 44 lines/varieties obtained from Cuu Long Rice Research Institute genebank, and 30 F1 generation combinations were evaluated. The results showed that the rice line IR79008-B-11-B-B-1 showed overall good physical characters (head rice, grain length, grain width, chalkiness). In terms of chemical characteristics, three varieties IR75499-73-1-B, OM6162, and OM4900 were found to have good amylose content, gel consistency, protein content, gelatinization temperature, and aroma. A very notable finding was that the cross between OM6162/SwarnaSub1 that low amylose content (20.2%), high gel consistency (78.2 mm), high protein content (8.1%), appropriate gelatinization temperature (scale 5), low chalkiness (level 0), high heritability (0.9) for grain yield trait/cluster, and (0.84) for the number of panicles/cluster. Moreover these characters consist of plant height, panicle length, number of panicles/cluster, number of filled grains/panicle, number of unfilled/panicle, and grain yield/ cluster showed moderate to high heritability of mean for combination OM6162/SwarnaSub1. The results suggest that the grain yield trait/cluster and the number of panicles/cluster are important yield contributing traits to rice breeders for selecting ideal combinations for higher yield and quality of next generations.
    Źródło:
    International Letters of Natural Sciences; 2016, 57
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of salinity stress on growth and phenolics of rice (Oryza sativa L.)
    Autorzy:
    Minh, L.T.
    Khang, D.T.
    Ha, P.T.T.
    Tuyen, P.T.
    Minh, T.N.
    Quan, N.V.
    Xuan, T.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/11459.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Opis:
    This study was conducted to determine the correlation between of salinity stress on growth and phenolic compounds in rice. It was observed that salinity stress caused a significant decrease in shoot lengths, fresh and dry weights of all rice varieties. Under salinity stress, changes of chemical contents also differed among phenolic compounds and rice cultivars. Total phenolics and flavonoids, and contents of vanillin and protocatechuic acid in tolerant varieties were strongly increased, whereas in contrast, they were markedly reduced in the susceptible cultivar. Ferulic acid and p-coumaric acid were detected only in tolerance rice. Vanillin and protocatechuic acid may play a role, but ferulic acid and p-coumaric acid may be much involved in the tolerant mechanism against salinity stress. Ferulic acid and p-coumaric acid and their derivatives are potent to be exploited as promising agents to reduce detrimental effects of salinity stress on rice production.
    Źródło:
    International Letters of Natural Sciences; 2016, 57
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of new drought tolerant breeding lines for Vietnam using marker-assisted backcrossing
    Autorzy:
    Thu Ha, P.T.
    Khang, D.T.
    Tuyen, P.T.
    Toan, T.B.
    Huong, N.N.
    Lang, N.T.
    Buu, B.C.
    Xuan, T.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/11519.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Źródło:
    International Letters of Natural Sciences; 2016, 59
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Correlation among agro-morphological variation and genetic diversity of rice (Oryza sativa L.) under drought stress
    Autorzy:
    Thu Ha, P.T.
    Khang, D.T.
    Tuyen, P.T.
    Minh, L.T.
    Minh, T.N.
    Thi Lang, N.
    Buu, B.C.
    Xuan, T.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/11160.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Opis:
    In this study, the correlation coefficients among agro-morphological variation, genetic diversity, and drought tolerance in 44 rice cultivars were analyzed. The drought tolerance at seeding stage (DTS) was significantly proportional to drought tolerance at vegetative stage (DTV) (r = 0.60). In addition, DTS and DTV had strong significant positive correlation to leaf roll (r = 0.87 and 0.54, respectively). Means of unfilled grains and tilling per panicle were proportionally correlated to DTS (r = 0.22 and 0.25, respectively), and DTV (r = 0.20 and 0.36, respectively). However, weight of 1000 grains and filled grains were recorded no correlation to DTS and DTV. At a homologous coefficient of 16.85 integrated from cluster analysis of agro-morphological, quantitative characteristics and drought tolerant scores, the rice cultivars were divided into five groups. Maximum polymorphic information content (PIC) values were detected in three markers including RM11125, RM21, and RM5629, which were from 0.78 to 0.79. Cluster analysis of microsatellite markers revealed that by a genetic distance of 0.63, the rice varieties were separated into three clusters. The results provide valuable information for rice breeders to select donors in breeding rice integrated with drought tolerance and good agronomic characteristics.
    Źródło:
    International Letters of Natural Sciences; 2016, 58
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Involvement of phenolic compounds in anaerobic flooding germination of rice (Oryza sativa L.)
    Autorzy:
    Khang, D.T.
    Ha, P.T.T.
    Lang, N.T.
    Tuyen, P.T.
    Minh, L.T.
    Minh, T.N.
    Bach, D.T.
    Xuan, T.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/11377.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Opis:
    By this study, thirty rice varieties were evaluated for anaerobic flooding tolerance using the direct sowing method. Phenolic profiles of strong and weak tolerant varieties were identified and compared based on HPLC chromatograms. The germination rates and shoot heights of rice were recorded for calculating the seedling vigor, which indicate the tolerant ability of rice in flooding condition. The results revealed a high variation of germination rate (10.01 to 100%), shoot height (0.35 to 78.17 mm) and seedling vigor (0.05 to 72.83). There was a high correlation between (r = 0.71) germination rate in 5 cm and 10 cm flood. Phenolic and flavonoid contents of the strong tolerant cultivar significantly and proportionally increased in the flooding levels (5 cm and 10 cm). There was a total difference in terms of number of phenolic acids found in the strong and weak tolerant varieties. In particular, six phenolic acids (gallic acid, catechol, caffeic acid, syringic acid, vanillin, and ellagic acid) were only identified with high concentration in the strong tolerant cultivar. The findings suggest that the phenolics presented in the strong tolerant varieties probably have a certain function in response and adaptation to anaerobic flooding condition. Further researches on exogenous application of these phenolic acids to increase the flooding tolerant level of rice should be continued at both green house and field treatments.
    Źródło:
    International Letters of Natural Sciences; 2016, 56
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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