scholarly journals Biochemical Composition of Some Selected Aquatic Macrophytes Under Ex-Situ Conditions

2018 ◽  
Vol 44 (1) ◽  
pp. 53-60
Author(s):  
Harich And Hazra ◽  
Md Al Mujaddade Alfasane ◽  
Sharmin Kauser ◽  
Umme Fatema Shahjadee ◽  
Moniruzzaman Khondker
Keyword(s):  
Aquatic Plants ◽  
Biochemical Composition ◽  
Aquatic Macrophytes ◽  
The Other ◽  
Ex Situ ◽  
Human Diet ◽  
Culture Studies ◽  
Ipomoea Aquatica ◽  
Other Hand ◽  
Calcium And Phosphorus

Ex-situ culture studies of five selected aquatic macrophytes, namely Nymphaea nouchali Burm. f., Enhydra fluctuans Lour., Ipomoea aquatica Forsk., Hygroryza aristata (Retz.) Nees ex Wight & Arn. and Limnocharis flava (L.) Buch. were carried out. Comparing the biochemical composition of the above mentioned five aquatic macrophytes, on an average, Enhydra fluctuans was found to contain highest amounts of proteins (18.20%) and Ipomoea aquatica contains highest amounts of carbohydrate (58.60%). Lowest amounts of proteins (14.35%) were recorded in Hygroryza aristata and Limnocharis flava. On the other hand lowest amounts of carbohydrates were obtained in Nymphaea nouchali. Ipomoea aquatica contained highest amounts of energy (321.23 kcal) and lowest amount was observed in Limnocharis flava. The five aquatic plants were low in fiber, fat and also in ash. Among all the five aquatic macrophytes, highest values of calcium and phosphorus were found to be present in Limnocharis flava and iron was highest in Nymphaea nouchali. Lowest values of calcium and phosphorus were present in Ipomoea aquatica and lowest amount of iron was present in Limnochris flava. The present study demonstrated that, these five aquatic macrophytes are the important sources of carbohydrate, protein and minerals, which are suitable for incorporation in human diet and feed also. Asiat. Soc. Bangladesh, Sci. 44(1): 53-60, June 2018

Self-organization of magnetic nanogroove arrays by LaserMBE and hydrogen reduction.

2007 ◽  
Vol 1032 ◽  
Author(s):  
Akifumi Matsuda ◽  
Takahiro Watanabe ◽  
Yasuyuki Akita ◽  
Makoto Hosaka ◽  
Kouji Koyama ◽  
...  
Keyword(s):  
Self Assembly ◽  
Quantum Interference ◽  
Hydrogen Reduction ◽  
Magnetic Nanostructures ◽  
High Energy ◽  
The Other ◽  
Ex Situ ◽  
Force Microscopy ◽  
Self Organized ◽  
Other Hand

AbstractThe epitaxially grown magnetic nanostructures including nanodots, nanowires and nanorings have been attracting much scientific and engineering interests because of their expected unique physical characteristics due to quantum effects. These epitaxial nanomagnets and their array are undoubtedly thought to make major contribution to the development of future SPINTRONICS devices, ultra-high density magnetic random access memory (MRAM) and magnetic switching devices for examples, and other quantum devices. In this case, epitaxial growth of the nanomagnets and the resulting anisotropic properties are one of the largest interest as well as fine-nanostructuring. There have been some concerns such as throughput rate with conventional nanoprocessing techniques involving FIB lithography and e-beam lithography, and/or minimization-limit with photolithography due to the wavelength. On the other hand, self-assembly or self-organized methods could also be used for construction of nanopatterns, in which such nanostructures are directly built up from separate atoms. Here we report about formation and characterization of self-organized nanomagnet arrays made of metals and oxides. We have epitaxially grown ferrimagnetic Fe3O4 (111), (Mn0.55Zn0.35Fe0.10)Fe2O4 (111), ferromagnetic Ni (111) and antiferromagnetic NiO (111) nanodots, nanowires and nanogroove arrays on the atomically stepped ultra-smooth sapphire (0001) substrate by LaserMBE. The sapphire (a-Al2O3single crystal) substrates have atomic steps of 0.2 nm in height and atomically flat terraces of 50-100 nm in width so that self-assembly processes of nanomagnet arrays were strongly induced by the energetic instability at the straight and periodic step-edges. In this study, NiO worked as a antiferromagnetic exchange bias layer. On the other hand, NiO was also reduced into ferromagnetic Ni metal by annealing in hydrogen atmosphere in some situations for further applications. Crystallographic and morphology analyses of the nanomagnets were made by in-situ reflection high-energy electron diffraction (RHEED), ex-situ X-ray diffraction (XRD), transmission electron microscope (TEM). and atomic force microscopy (AFM). Magnetic properties were characterized by superconducting quantum interference device (SQUID) magnetometer and magnetic force microscopy (MFM). Further experimentals are conducted for magneto-optical characterizations for above mentioned metal and/or oxide nanomagnet arrays.

scholarly journals The cultural and political ecology of reed-cane craftsmanship in Lake Eber

2021 ◽  
Vol 15 (1) ◽  
pp. 17-36
Author(s):  
Evren Ekiz ◽  
◽  
Hakki Yazici ◽  
Keyword(s):  
Political Ecology ◽  
Aquatic Plants ◽  
Building Materials ◽  
Field Studies ◽  
Common Reed ◽  
The Other ◽  
Research Subject ◽  
Lake Ecology ◽  
Other Hand ◽  
Cultural And Political Ecology

The current study examines the interactions of people living around Lake Eber with the lake and their use of it from a cultural and political ecology perspective. In this context, fieldworks were carried out in different periods of 2018-2019. At the same time, observations and interviews covering the research subject were carried out. In the study, it was determined that aquatic plants such as common reed, reedmace, lakeshore bulrush and common cattail are cut from the Lake Eber and are used as building materials and in the production of rush mats, beach umbrellas, prayer rugs, reed pillows, floor mats (straw) and tomb mats. On the other hand, it was observed that the interest in reed-cane craftsmanship and the production of reed-cane products is decreasing every year. This is caused by drought, pollution and eutrophication processes seen in the lake. Based on the results of the study, we suggest that more field studies should be done to examine the factors that threaten the lake ecology and projects should be conducted to improve the situation in the lake.

scholarly journals Cryofreezing of Grass Carp (Ctenopharyngodon idella) Spermatozoa for Ex Situ Conservation

2013 ◽  
Vol 21 (1-2) ◽  
pp. 141-150 ◽  
Author(s):  
MRI Sarder ◽  
MA Hossain ◽  
MS Hossain
Keyword(s):  
Grass Carp ◽  
Egg Yolk ◽  
The Other ◽  
Ctenopharyngodon Idella ◽  
Ex Situ ◽  
Optimum Level ◽  
Dilution Ratio ◽  
Other Hand ◽  
Grass Carp Ctenopharyngodon Idella ◽  
Thaw Period

Experiments were conducted to develop and standardize the protocols for cryopreservation of sperm of grass carp (Ctenopharyngodon idella). Seven extenders such as Alsever’s solution, Urea egg-yolk, Egg-yolk citrate, Kurokura- 1, Kurokura-2, 0.9% NaCl and 0.6% Glucose and five cryoprotectants i.e. DMSO, methanol, ethanol, DMA and glycerol were employed for finding suitable combinations. Cryodiluents were prepared by mixing the cryoprotectants at 10% concentration of the extenders (v/v). Milt and cryodiluents were mixed at a ratio of 1:9 for Alsever’s solution, Kurokura-1, Kurokura-2, 0.9% NaCl and 0.6% glucose, and 1:4 for urea egg-yolk and egg-yolk citrate. Among the 35 combinations of extenders and cryoprotectants, Alsever’s solution with ethanol and methanol, urea egg-yolk and egg-yolk citrate with DMSO found suitable for preservation and it produced 74 ± 2.44%, 72 ± 2.54%, 76 ± 2.44% and 75 ± 2.23% spermatozoan motility at the post-thaw period respectively. Rest of the combinations, on the other hand, produced <60% motility at the post-thaw period and glycerol was found to be clotted after freezing. The dilution of milt with cryodiluent has been tested using six dilution ratios (1:2, 1:4, 1:7, 1:9, 1:15, 1:20) and found that 1:9 dilution ratio produced the highest post-thaw spermatozoan motility with Alsever’s solution (>75%) and 1:4 with urea eggyolk and egg-yolk citrate (>70%). As an optimum level of cryoprotectant, 10% concentration was found effective to produce significantly highest (P<0.05) percentage of spermatozoan motility compared to those of other four concentrations (5, 15, 20 and 30%).DOI: http://dx.doi.org/10.3329/pa.v21i1-2.16763 Progress. Agric. 21(1 & 2): 141 - 150, 2010

scholarly journals CHANGES IN THE PERCENTAGE OF CALCIUM AND PHOSPHORUS OF THE BLOOD FOLLOWING SECTION OF THE SYMPATHETIC AND VAGUS NERVES

1928 ◽  
Vol 47 (1) ◽  
pp. 105-114 ◽  
Author(s):  
Benjamin N. Berg ◽  
Alfred F. Hess ◽  
Elizabeth Sherman
Keyword(s):  
Serum Calcium ◽  
Inorganic Phosphate ◽  
Splanchnic Nerve ◽  
The Other ◽  
Celiac Plexus ◽  
Vagus Nerves ◽  
Parasympathetic Nerves ◽  
Other Hand ◽  
Calcium And Phosphorus

When a splanchnic nerve or the celiac plexus was severed a definite fall in serum calcium resulted, the level falling to 6 mg. per cent and remaining low for 1 or 2 weeks. Tetany, however, did not develop. The inorganic phosphate was slightly altered. On the other hand, when the vagi nerves were severed, the serum calcium rose. The equilibrium of both calcium and phosphorus was rendered less stable by the division of the sympathetic or the parasympathetic nerves.

scholarly journals KAJIAN BUDAYA VISUAL DALAM ILMU KOMUNIKASI: POSISI DAN METODE PENELITIAN

2017 ◽  
pp. 195-206
Author(s):  
Adde Oriza Rio
Keyword(s):  
Visual Culture ◽  
Communication Technology ◽  
Visual Communication ◽  
Visual Image ◽  
The Other ◽  
Culture Studies ◽  
Visual Ability ◽  
Visual Culture Studies ◽  
Other Hand ◽  
Communication Practices

AbstractThe centrality of the eye and visual ability in the life of individuals and society has spawneda form of culture that is called as visual culture. Visual culture studies are a burgeoningarea of study that emphasizes the complex interrelationship between visual image, cultureand spectators of visual image. On the other hand, communication practices that utilizevisual messages as means of interaction are also increasingly prevalent as this is driven bythe development of visual and communication technology which allows peoples to producetheir own visual image as messages to communicate them. This article tries to discuss theposition of visual culture studies within the communication science and the researchmethods that can be used in the communication science to examine visual image, culture,and spectatorships.Keywords: Visual culture, Visual culture studies, Visual communication,Communication science, Visual methodologies.

A study of cometary eruptions through OH radio-lines

1999 ◽  
Vol 173 ◽  
pp. 249-254
Author(s):  
A.M. Silva ◽  
R.D. Miró
Keyword(s):  
Short Duration ◽  
Growth Curves ◽  
The Other ◽  
Initial Mass ◽  
Radio Lines ◽  
Other Hand ◽  
Sudden Rise

AbstractWe have developed a model for theH2OandOHevolution in a comet outburst, assuming that together with the gas, a distribution of icy grains is ejected. With an initial mass of icy grains of 108kg released, theH2OandOHproductions are increased up to a factor two, and the growth curves change drastically in the first two days. The model is applied to eruptions detected in theOHradio monitorings and fits well with the slow variations in the flux. On the other hand, several events of short duration appear, consisting of a sudden rise ofOHflux, followed by a sudden decay on the second day. These apparent short bursts are frequently found as precursors of a more durable eruption. We suggest that both of them are part of a unique eruption, and that the sudden decay is due to collisions that de-excite theOHmaser, when it reaches the Cometopause region located at 1.35 × 105kmfrom the nucleus.

Closing the GAP—A 5Å Scanning Microscope

1969 ◽  
Vol 27 ◽  
pp. 6-7
Author(s):  
A. V. Crewe
Keyword(s):  
Normal Form ◽  
The Other ◽  
Resolving Power ◽  
Scanning Microscope ◽  
Conventional Microscope ◽  
Other Hand ◽  
Closing The Gap ◽  
Thermal Sources ◽  
Better Than ◽  
Transmission Microscope

We have become accustomed to differentiating between the scanning microscope and the conventional transmission microscope according to the resolving power which the two instruments offer. The conventional microscope is capable of a point resolution of a few angstroms and line resolutions of periodic objects of about 1Å. On the other hand, the scanning microscope, in its normal form, is not ordinarily capable of a point resolution better than 100Å. Upon examining reasons for the 100Å limitation, it becomes clear that this is based more on tradition than reason, and in particular, it is a condition imposed upon the microscope by adherence to thermal sources of electrons.

Life Beyond 1MeV

1980 ◽  
Vol 38 ◽  
pp. 30-33
Author(s):  
K.H. Westmacott
Keyword(s):  
Electron Microscopy ◽  
Past Experience ◽  
The Other ◽  
Good Case ◽  
Other Hand ◽  
The U.S

Life beyond 1MeV – like life after 40 – is not too different unless one takes advantage of past experience and is receptive to new opportunities. At first glance, the returns on performing electron microscopy at voltages greater than 1MeV diminish rather rapidly as the curves which describe the well-known advantages of HVEM often tend towards saturation. However, in a country with a significant HVEM capability, a good case can be made for investing in instruments with a range of maximum accelerating voltages. In this regard, the 1.5MeV KRATOS HVEM being installed in Berkeley will complement the other 650KeV, 1MeV, and 1.2MeV instruments currently operating in the U.S. One other consideration suggests that 1.5MeV is an optimum voltage machine – Its additional advantages may be purchased for not much more than a 1MeV instrument. On the other hand, the 3MeV HVEM's which seem to be operated at 2MeV maximum, are much more expensive.

Can the Academic Self-Concept be Positive and Realistic?

2005 ◽  
Vol 19 (3) ◽  
pp. 129-132 ◽  
Author(s):  
Reimer Kornmann
Keyword(s):  
Academic Performance ◽  
Opposite Effect ◽  
Self Esteem ◽  
Point Of View ◽  
The Other ◽  
Self Concept ◽  
High Ability ◽  
Self Image ◽  
Other Hand

Summary: My comment is basically restricted to the situation in which less-able students find themselves and refers only to literature in German. From this point of view I am basically able to confirm Marsh's results. It must, however, be said that with less-able pupils the opposite effect can be found: Levels of self-esteem in these pupils are raised, at least temporarily, by separate instruction, academic performance however drops; combined instruction, on the other hand, leads to improved academic performance, while levels of self-esteem drop. Apparently, the positive self-image of less-able pupils who receive separate instruction does not bring about the potential enhancement of academic performance one might expect from high-ability pupils receiving separate instruction. To resolve the dilemma, it is proposed that individual progress in learning be accentuated, and that comparisons with others be dispensed with. This fosters a self-image that can in equal measure be realistic and optimistic.

Stories and the Self

2020 ◽  
Vol 32 (2) ◽  
pp. 47-58 ◽  
Author(s):  
Stefan Krause ◽  
Markus Appel
Keyword(s):  
Meta Analysis ◽  
The Self ◽  
The Other ◽  
Lower Degree ◽  
Contrast Effects ◽  
Self Perception ◽  
Self Perceptions ◽  
Other Hand ◽  
The One ◽  
Implicit And Explicit

Abstract. Two experiments examined the influence of stories on recipients’ self-perceptions. Extending prior theory and research, our focus was on assimilation effects (i.e., changes in self-perception in line with a protagonist’s traits) as well as on contrast effects (i.e., changes in self-perception in contrast to a protagonist’s traits). In Experiment 1 ( N = 113), implicit and explicit conscientiousness were assessed after participants read a story about either a diligent or a negligent student. Moderation analyses showed that highly transported participants and participants with lower counterarguing scores assimilate the depicted traits of a story protagonist, as indicated by explicit, self-reported conscientiousness ratings. Participants, who were more critical toward a story (i.e., higher counterarguing) and with a lower degree of transportation, showed contrast effects. In Experiment 2 ( N = 103), we manipulated transportation and counterarguing, but we could not identify an effect on participants’ self-ascribed level of conscientiousness. A mini meta-analysis across both experiments revealed significant positive overall associations between transportation and counterarguing on the one hand and story-consistent self-reported conscientiousness on the other hand.

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