Results 131 to 140 of about 864 (168)
Some of the next articles are maybe not open access.
Variation of Ceratophyllum Demersum in Eastern Kansas
Transactions of the Kansas Academy of Science (1903-), 1951Field observations in the state reveal that Ceratophyllum demersum L. is a much more common plant than our records show. Gates (1940) lists the plant from eight scattered counties. The writer has, however, found the species in many Kansas counties and feels certain that it occurs throughout the state in suitable habitats.
R. L. McGregor, K. L. Sperry
openaire +1 more source
2023
งานวิจัยนี้ศึกษากระบวนการไพโรไลซิสของมหสาหร่ายพุงชะโด (Ceratophyllum demersum L.) โดยใช้ตัวเร่งปฏิกิริยาโดโลไมต์บนเครื่องปฏิกรณ์แบบต่อเนื่องเพื่อศึกษาภาวะดำเนินการที่เหมาะสมที่ให้ร้อยละผลได้ของน้ำมันชีวภาพที่สูงสุดและมีสมบัติความเป็นเชื้อเพลิงที่สามารถนำมาใช้เป็นพลังงานได้ โดยปัจจัยที่สนใจในการศึกษานี้ประกอบด้วย อุณหภูมิ ขนาดอนุภาคเฉลี่ย อัตราการป ...
openaire +1 more source
งานวิจัยนี้ศึกษากระบวนการไพโรไลซิสของมหสาหร่ายพุงชะโด (Ceratophyllum demersum L.) โดยใช้ตัวเร่งปฏิกิริยาโดโลไมต์บนเครื่องปฏิกรณ์แบบต่อเนื่องเพื่อศึกษาภาวะดำเนินการที่เหมาะสมที่ให้ร้อยละผลได้ของน้ำมันชีวภาพที่สูงสุดและมีสมบัติความเป็นเชื้อเพลิงที่สามารถนำมาใช้เป็นพลังงานได้ โดยปัจจัยที่สนใจในการศึกษานี้ประกอบด้วย อุณหภูมิ ขนาดอนุภาคเฉลี่ย อัตราการป ...
openaire +1 more source
Hormonal interactions in Ceratophyllum demersum
Aquatic Botany, 1982Ceratophyllum demersum L. is a submerged aquatic macrophyte without roots. It occurs in winter in the dormant form and in summer in the active form. The effect of application of mixtures of indole acetic acid (IAA), abscisic acid (ABA) and gibberellic acid (GA3) on subsequent growth after treatment in the quiescent stage was studied.
openaire +1 more source
Ammonia stress on the carbon metabolism of Ceratophyllum demersum
Environmental Toxicology and Chemistry, 2014Abstract In the present study, carefully controlled pH ranges (7 and 9) were used to distinguish between the effects of un-ionized NH3 and the NH4+ ion. The objective was to find the effect of different total ammonia nitrogen concentrations and pH values on the carbon metabolism of Ceratophyllum ...
Jingqing, Gao +5 more
openaire +2 more sources
Effect of ammonia stress on nitrogen metabolism of Ceratophyllum demersum
Environmental Toxicology and Chemistry, 2015Abstract The objective of the present study was to determine the effect of total ammonia N concentration and pH on N metabolism of Ceratophyllum demersum and to evaluate stress as a result of inorganic N enrichment in the water column on submerged macrophytes.
Gao, Jingqing +5 more
openaire +3 more sources
Growth Substances and Dormancy in Ceratophyllum demersum
Physiologia Plantarum, 1979Abstract Ceratophyllum demersum L. occurs in winter in the dormant form, in summer in the vegetative form. Factors that affect growth and dormancy in Ceratophyllum were studied. After several weeks of severe winter conditions the plants changed from dormant to quiescent state.
openaire +2 more sources
Ceratophyllum demersum (coontail).
2021Abstract C. demersum is a cosmopolitan submerged aquatic species that has probably already invaded most of its potential exotic range. It has the advantages of being a perennial surviving well over-winter in deeper water and by growing both by asexual reproduction of broken or complete stems and by sexual reproduction of very many ...
openaire +1 more source
Photosynthesis in relation to growth and dormancy in Ceratophyllum demersum
Aquatic Botany, 1979Abstract Growth and photosynthetic activity in the different development stages of Ceratophyllum demersum L. were measured with particular reference to the physiological maxima of these processes and the factors influencing the carbon fixation rates.
Best, E.P.H., Meulemans, J.T.
openaire +2 more sources
Floral development and phyllotactic variation in Ceratophyllum demersum (Ceratophyllaceae)
American Journal of Botany, 2003The floral development of staminate and pistillate flowers of Ceratophyllum demersum was observed, with particular focus on the phyllotactic variation in staminate flowers, using scanning electronic microscopy (SEM). We discerned patterns of development of some important new morphological features, e.g., the difference and discontinuity between the ...
Akitoshi, Iwamoto +2 more
openaire +2 more sources
Ceratophyllum demersum – phosphorus interactions in nutrient enriched aquaria
Hydrobiologia, 2003High macrophyte density in shallow lakes is often associated with clear water, especially when the non-rooted, submerged angiosperm Ceratophyllum demersum is dominant. Lack of true roots and high surface area:volume ratio suggest that nutrient uptake from the water column by C. demersum may be high.
Paola Lombardo, G. Dennis Cooke
openaire +1 more source