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    Wyświetlanie 1-10 z 10
    Tytuł:
    Cadmium Toxicity Towards Marine Diatom Thalassiosira sp. and its Alteration on Chlorophyll-a and Carotenoid Content
    Autorzy:
    Wahyu, Dionisius
    Hindarti, Dwi
    Permana, Rega
    Powiązania:
    https://bibliotekanauki.pl/articles/1031551.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Cadmium
    Carotenoid
    Chlorophyll-a
    Thalassiosira sp
    Opis:
    Cadmium is one of the non-essential metals that have toxic effects on aquatic organisms, including diatoms. Diatoms play significant important roles in the aquatic environment, hence, the presence of cadmium will have a significance growth inhibition to its abundance. In this paper, we tried to clarify the effects of cadmium on growth, chlorophyll-a and carotenoid contents of the diatom Thalassiosira sp. Growth inhibition of the phytoplankton was determined following exposure for 96h to several different concentrations of cadmium solutions in an experiment adapted from ASEAN-Canada CPMS II. Our work shows that IC50 of growth and chlorophyll-a was around 0.32 mg/L and 0.914 mg/L, respectively. In addition, Lowest Observed Effect Concentration (LOEC) and No Observed Effect Concentration (NOEC) were 0.18 mg/L and 0.1 mg/L, respectively. In conclusion, cadmium inhibits the growth, as well as the photosynthetic pigment contents of Thalassiosira sp.
    Źródło:
    World News of Natural Sciences; 2020, 31; 48-57
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Determination of Shortfin Scad (Decapterus sp.) Potential Fishing Area with Chlorophyll-a Distribution in Pekalongan Sea, Central Java, Indonesia
    Autorzy:
    Wicaksono, Viga Ananda
    Hasan, Zahidah
    Gumilar, Iwang
    Dewanti, Lantun P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1075694.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Chlorophyll-a
    Fishing ground
    Pekalongan
    Shortfin Scad
    Opis:
    The fishing ground can be determined by detecting oceanography parameters in seawater area. One of the oceanographic parameters that can be used is chlorophyll-a. This research aims to analyze the relationship between chlorophyll-a and total catch of shortfin scad along with potential map areas for fishing shortfin scad (Decapterus sp.) in Pekalongan seawater. The research was conducted in two stages, which are field data collection in January and downloading and processing satellite image data in February. This research used the survey method with spatial analysis. Primary spatial data used is the distribution of chlorophyll-a and data of shortfin scad fishing production. The study shows an average concentration of chlorophyll-a from 2013-2017 in Pekalongan seawater ranges around 0,16 - 1,55 mg/m3. The result of linear regression test shows that chlorophyll-a has a role as one of the factors that influence the total catch of shortfin scad in Pekalongan seawater, East Java by 23%. Other factors influence the remaining 77%. Based on the assessment of fishing ground, there are 25 potential coordinate points of shortfin scad fishing area in Pekalongan seawater that can be categorized as a potential fishing ground.
    Źródło:
    World Scientific News; 2019, 119; 111-124
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cadmium effects on growth and photosynthetic pigment content of Chaetoceros gracilis
    Autorzy:
    Ferdian, Ferdian
    Hindarti, Dwi
    Permana, Rega
    Powiązania:
    https://bibliotekanauki.pl/articles/1030841.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Carotenoids
    Cell density
    Chaetoceros gracilis
    Chlorophyll-a
    Toxicity test
    Opis:
    Cadmium wastewater released by human activities will eventually enter the aquatic environment. Living organism that lives around could potentially exposed by these cadmium, including C. gracilis which play a critical role as a primary producer. Cadmium can reduce the growth rate and pigment content in C. gracilis. Therefore, toxicity testing becomes important to do considering that C. gracilis has many benefits such as shrimp feed and have active compounds for antibacterial and biodiesel. Toxicity test was performed in 96-hours with a series of concentration 0, 0.56, 1.0, 1.8, 3.2, 5.6 mg/L. IC50 cadmium results in concentrated cell density and chlorophyll-a C. gracilis were 1.62 mg/L and 3.4 mg/L, while carotenoids were not in accordance with the contribution of cadmium. NOEC and cadmium LOEC to C. gracilis cell density were 0.56 mg/L and 1.0 mg/L.
    Źródło:
    World Scientific News; 2020, 145; 245-255
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spatial and temporal distribution of sea surface chlorophyll-a front in Java Sea, Indonesian Waters
    Autorzy:
    Kholifatul, Aziz
    Sunarto, Sunarto
    Syamsuddin, Mega
    Yuliadi, Lintang
    Powiązania:
    https://bibliotekanauki.pl/articles/1046555.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Chlorophyll-a front
    Indonesian waters
    Java Sea
    monsoonal wind
    Opis:
    A chlorophyll-a front is a border between two water masses with chlorophyll-a concentration gradient 0.15-0.5 mg/m3. Such masses and the related interface are usually located near the northern, western and southern coastal parts of the Javal Sea (between 3º S - 5º S and 110º E - 116 º E, 3º S - 5º30’ S and 106º E - 107º E, 5º S – 7º30’ S and 116º E - 114º E), and are strongly influenced by the northwest monsoonal winds system. In this work, we used the Single Image Edge Detection (SIED) Algorithm to detected the frontal face. The gradient level we used to designate the passing from and into a front was 0.5 mg/m3. Monthly data of the chlorophyll-a image, sea surface current imagery and rainfall levels from January to December 2015 were used in this study. From this data, we discovered that the monthly average of the lengths of the chlorophyll-a front ocurrence reaches a greatest extent in March with 2513.64 km and a least extent at 510.25 km in October. In addition, the fronts move closer to the coastal area during the transitional I to transitional II period. Our data suggest that surface current affects frontal movement. Moreover, the number of succeeding fronts and the intensity of change are influenced by nutrient supply from rivers that is, in turn, affected by rainfall level. This is because the rainfall data shows a similar pattern with temporal front data.
    Źródło:
    World Scientific News; 2019, 137; 70-80
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Seed potentition and enhancement of plant potential of a mungbean species using plant extract
    Autorzy:
    Pati, Chandan Kumar
    Powiązania:
    https://bibliotekanauki.pl/articles/1066243.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Catalase
    Chlorophyll
    Mungbean
    Ocimum sanctum
    Plant potentiaion
    Tulsi
    Vigna radiate
    Opis:
    Pretreatment of mungbean (Vigna radiata) seeds with leaf extract of tulsi (Ocimum sanctum) for 4 hours before accelerated ageing treatment (99.5% RH and 32±2oC) for different durations for 30 days slowed down the ageing-induced rapid loss of seed germination. Plant performance was found to be much better developed from seeds which underwent plant extract pretreatment measured in terms of few reliable indices. Plant potential was also higher in the pretreatment as evidenced from the treatment-induced higher chlorophyll level as well as activity of catalase enzyme. Results, therefore, pointed out that the plant extract-pretreated seeds retained higher seed vigour and produced healthier plants inspite of experiencing accelerated ageing treatment.
    Źródło:
    World Scientific News; 2019, 131; 268-271
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Molecular markers of delayed senescence in transgenic tobacco with enhanced cytokinin level
    Autorzy:
    Skowron, Ernest
    Trojak, Magdalena
    Sobala, Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/1190060.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    tobacco
    delayed senescence
    cytokinin
    ipt
    SAG12
    chlorophyll
    Rubisco LSU
    superoxide dismutase
    Opis:
    Cytokinins are phytohormones that promote plant growth and development. They stimulate cell division and upregulate expression of photosynthetic-associated genes. However, the main reason for cytokinin research is their anti-senescing action used to delay the onset of plant senescence, improve productivity and postharvest storage. Exogenously applied cytokinins, like 6-benzylaminopurine, are commonly use to slow down or even inhibit the leaf yellowing and prolong lifespan of economically important plants. Similar effects, the regreening of mature fully-developed basal leaves, can be obtained by removal the top of the plant redirecting cytokinins flow from roots back to the ageing structures. Nevertheless, the real breakthrough was the engineering of transgenic tobacco plants with an inserted gene of cytokinins biosynthetic pathway (ipt) fused with a senescence-specific promoter (PSAG12). Enhanced hormones synthesis results in a leaf ageing retardation and its negative auto-regulated activity prevents developmental abnormalities. We studied the capacity of elevated hormone level in the transgenic tobacco to reduce chlorophyll, soluble proteins and Rubisco degradation in plants exposed to nine days of light deprivation. We also investigated possible correlation between the enhanced cytokinin synthesis and antioxidant properties of PSAG12-IPT plants analyzing three isoforms of superoxide dismutase. This paper is an attempt to determine molecular and physiological basis of cytokinin role in an inhibition of leaf ageing.
    Źródło:
    World Scientific News; 2016, 51; 13-25
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative evaluation of the nutritional value and the content of bioactive compounds in the fruit of individual species of chaenomeles and quince
    Autorzy:
    Ponder, Alicja
    Hallmann, Ewelina
    Powiązania:
    https://bibliotekanauki.pl/articles/1178431.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    bioactive compounds
    carotenoids
    chaenomeles
    chlorophyll
    dry matter
    nutritional value
    polyphenols
    quince
    vitamin C
    Opis:
    The objective of this study was to evaluate the nutritional value and the content of bioactive compounds in the fruit of individual species of chaenomeles and quince. The experimental material were the fruits of four species of chaenomeles (Chaenomeles×superba, Chaenomeles japonica apple-shape, Chaenomeles japonica pear-shape and Chaenomeles ssp.) and quince (Cydonia oblonga). The fruit were analyzed for dry matter, vitamin C, polyphenols, carotenoids and chlorophyll content. The obtained results showed that the species has an impact on the nutritional value and the content of bioactive compounds in the chaenomeles and quince fruits. The highest content of dry matter, total polyphenols, total phenolic acids as well as more total and individual phenolic acids (caffeic and p-coumaric acid) were found in quince fruits (Cydonia oblonga). Quince fruits Cydonia oblonga also contained the highest content of total flavonoids and individual flavonoids: quercetin-3-O-rutinoside, myrycetin and quercetin. The highest content of lutein and zeaxanthin was observed in fruits of Chaenomeles ×superba but Cydonia oblonga fruits contained significantly more beta-carotene and chlorophyll, both the total chlorophylls and individual chlorophylls: chlorophyll a and chlorophyll b. In contrast, the highest content of vitamin C was found in fruits Chaenomeles Japanese pear-shape.
    Źródło:
    World Scientific News; 2017, 73; 100-107
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Chromium toxicity in Sesbania sesban (L.) Merr
    Autorzy:
    Bakiyaraj, R.
    Mahakavi, T.
    Baskaran, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/10775.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    chromium
    toxicity
    Sesbania grandiflora
    pot experiment
    toxic effect
    plant
    germination
    chlorophyll
    enzyme
    metal accumulation
    seedling
    shoot
    Opis:
    Chromium is one of the most common toxic metals present in the environment that induces various toxic effects in plants. A pot experiment was conducted to determine the effects of chromium on germination percentage, seedling growth, chlorophyll ‘a’, ‘b’ and proline content of Sesbania sesban (L.) Merr. The seedlings were treated with different concentrations of control, 0.10, 0.25, 0.50, 0.75 and 1.00 g kg-1 of chromium. The parameters such as germination percentage, root and shoot length, seedling fresh weight dry weight, chlorophyll ‘a’, ‘b’ and proline content of leaves were measured. Our results indicated that a significant inhibitory effect was observed at all levels of chromium compared to control. Increasing the concentration of chromium to 1.00 g kg-1 showed a significant decrease in seed germination, shoot and root length, fresh weight, dry weight and chlorophyll ‘a’ and ‘b’ content of plant. While proline, catalase and peroxidase contents were increased by increasing Cr concentration. It was also noted that accumulation of chromium in the roots was much higher than the shoots of the seedlings under treatment.
    Źródło:
    International Letters of Natural Sciences; 2014, 04
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ecophysiological and biochemical changes in Abelmoschus esculentus (L.) Moench under chromium stress
    Autorzy:
    Unnikannan, P.
    Vedhanarayanan, P.
    Sundaramoorthy, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/10841.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    ecophysiological change
    biochemical change
    Abelmoschus esculentus
    bhendi
    chlorophyll content
    mineral nutrient
    chromium stress
    biochemical parameter
    Opis:
    Increasing concentrations of chromium caused reduction in growth, chlorophyll contents and mineral mutrients of bhendhi. At increasing concentrations of chromium, all the attributes were found to be reduced. Chromium is one of the toxic elements discharging from tannery industry. The long disposal of tannery effluent to the agricultural land causes serious damages in the soil texture; reduce the growth of microorganisms and agricultural crops. Large areas of Vellore district of Tamilnadu was seriously affected by the tannery effluent irrigation to the agricultural land. The present study was conducted to identify the phytotoxic effect and physiological changes of Abelmoschus esculentus (L.) Moench under the treatment of different concentrations of chromium solutions (2.5, 5, 10, 25, 50, 75 and 100 mg/l). The result shows that there was a gradual reduction in the morphological parameters (root length, shoot length, fresh weight and dry weight). Similarly the photosynthetic pigments (Chlorophyll and carotenoid) and biochemical parameters such as protein, amino acid, and sugars were also gradually decreased with increasing concentrations of chromium.
    Źródło:
    International Letters of Natural Sciences; 2014, 02
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of NaCl, CaCl2 and their combination of salt on seed germination and seedling growth of Lycopersicon esculentum L.
    Autorzy:
    Sivasankaramoorthy, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/11521.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    sodium chloride
    calcium chloride
    chlorophyll
    catalase
    peroxidase
    salt
    seed germination
    seedling growth
    Lycopersicon esculentum
    tomato
    salt stress
    Opis:
    To compare the effect of NaCl, CaCl2 and their combinations on germination and early seedling growth stages of Lycopersicum esculentum L., were studied under pot experiments 2008. Results indicated that significant increases were recorded in percentage of germination, seedling fresh and dry weights, seedling length, water content, catalase activity and photosynthetic pigments (chlorophyll a, b and total chlorophylls as well as carotenoids) under the low level concentration (20 mM) of NaCl or CaCl and their combination (1:1). On other hand increasing salt concentration in nutrient solution caused significant decrease in all of these parameters. The great reduction occurred under high salinity level of NaCl (50 mM). Meanwhile, peroxidase activity increased significantly with increasing salinity levels from 20 mM to 50 mM of both applied salinity types. Besides, peroxidase activity under NaCl salinity showed a marked increase followed by NaCl + CaCl2 (1:1) and CaCl2 at 50 mM.
    Źródło:
    International Letters of Natural Sciences; 2014, 17
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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