VI.—Calcium Carbonate and Evolution in Polyzoa

1916 ◽  
Vol 3 (2) ◽  
pp. 73-77 ◽  
Author(s):  
W. D. Lang
Keyword(s):  
Calcium Carbonate ◽  
Systematic Position ◽  
The Other ◽  
Microscopic Structure ◽  
Siliceous Sponge ◽  
Important Paper ◽  
Mesh Work ◽  
The One ◽  
Geological Magazine

In a review in the Geological Magazine for 1913 of an important paper by Cumings on the development and systematic position of the Monticuliporoids, it was pointed out that the elucidation of the post-embryonic stages of that group conclusively proved them to be Polyzoa, and disposed of Kirkpatrick's contention that they were allied to Merlia, a recent siliceous sponge. Thus, further to prove the dissimilarity between the Monticuliporoids and Merlia is to flog a dead horse. Nevertheless we welcome the excellent figures by Cumings and Galloway of the microscopic structure of the two organisms showing that the skeleton of the one is formed of super-posed layers and the other of radiate spicules so adjusted as to form a mesh-work.

scholarly journals Some Observations on “Nitrification”

1907 ◽  
Vol 2 (1) ◽  
pp. 52-67 ◽  
Author(s):  
S. F. Ashby
Keyword(s):  
Organic Matter ◽  
Calcium Carbonate ◽  
Distinct Species ◽  
The Other ◽  
Soil Base ◽  
Arable Soils ◽  
Other Substances ◽  
Established Fact ◽  
The One ◽  
Two Stages

It is now a well-established fact that the ammonia, which is formed in the cultivated soil by the breaking down of nitrogenous organic matter through the action of bacteria and moulds, is itself converted by oxidation into nitrates. The latter process, “nitrification“ proper, is effected in two stages by two distinct species of bacteria, the one carrying the oxidation to nitrite, and the other changing the latter compound into nitrate. It is also known that, in the absence of a base, nitrification does not take place. The most usual and most available soil base is calcium carbonate, which is, however, present in some arable soils to only a very small amount, less than ·05 per cent.; in such soils, and in others where its presence cannot be detected, nitrification is still active, a fact which seems to suggest that other substances may replace it and serve as bases for nitrification.

scholarly journals Inhibition of scaling water of Tiznit region by "LEVALL®10".

2019 ◽  
Vol 8 (4) ◽  
pp. 283-289 ◽  
Author(s):  
Said Ben-aazza ◽  
Abdallah Hadfi ◽  
M'bark Belattar ◽  
Said Mohareb ◽  
Naima Hafid ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Water Treatment ◽  
Potable Water ◽  
The Other ◽  
Ecological Effect ◽  
Water Pipes ◽  
Other Hand ◽  
The One ◽  
New Generation ◽  
Carbonate Deposits

Combating the formation of calcium carbonate deposits in potable water pipes presents a challenge for water treatment systems, The use of inhibitors is one of the best techniques to prevent or delay the formation of these deposits. It is therefore essential to find a new generation of scale inhibitors, which is distinguished, on the one hand, by a better inhibiting effectiveness of calcium carbonate, and, on the other hand, by their ecological effect due to the respect of health and environment norms.

scholarly journals IV. Further observations on the nature and functions of the nodules of leguminous plants

1900 ◽  
Vol 193 (185-193) ◽  
pp. 51-67 ◽  
Keyword(s):  
Pisum Sativum ◽  
Royal Society ◽  
Host Plants ◽  
Systematic Position ◽  
The Other ◽  
Biological Factors ◽  
Leguminous Plants ◽  
Vicia Hirsuta ◽  
Anatomical Characters ◽  
The One

In a paper communicated to the Royal Society in December, 1898, an account was given by the writer of various experiments bearing on the nature of Leguminous nodules and the organisms concerned in their formation. The work, there described, had reference almost exclusively to the nodules borne by Pisum sativum and Vicia hirsuta , but it is now proposed to record some further results obtained from a more comparative study of nodules from other genera of the Leguminosse, and, in addition, to discuss, in some detail, subsequent experiments upon the nodule organisms, both in connection with their behaviour on artificial media, and the effect of their action upon the host plants, and, in conclusion, to consider these experiments in relation to the intimate connection, which they suggest as existing, between the host plants and their parasitic organisms on the one hand, and the very varied and complicated physical and biological factors of the environment on the other hand. As regards anatomical characters, the facts to hand are still not sufficiently comprehensive to admit of any general conclusions being drawn as to the relation of the nodules borne by the genera of the different sub-orders of the Leguminossæ ; it will, therefore, be convenient to consider each genus separately, irrespective of its systematic position in the order.

scholarly journals PENGARUH SUHU PADA PEMBENTUKAN PRECIPITATED CALCIUM CARBONATE (PCC) MELALUI METODA KAUSTIK SODA DENGAN MENGGUNAKAN PELARUT ASAM KLORIDA

2015 ◽  
Vol 3 (1) ◽  
pp. 12
Author(s):  
Budi Hermawan ◽  
Syukri Arief ◽  
Novesar Jamarun
Keyword(s):  
Electron Microscopy ◽  
Calcium Carbonate ◽  
Optimum Concentration ◽  
The Other ◽  
Optimum Temperature ◽  
X Ray Diffraction ◽  
Precipitated Calcium Carbonate ◽  
X Ray ◽  
The One ◽  
Scanning Electron

 ABSTRACT Precipitated Calcium Carbonate (PCC) is the limestone product resulting from certain process steps. By XRF measurement it has found that the content of CaO (oxide calcium) in limestone Bukit Tui Padang Panjang as follows 54.19%, SiO2 1.03%, Al2O3 0.39%, MgO 0.46% and Fe2O3 0.2%. Rendemen PCC at optimum concentration of 0.75 M HCl is 69.77%. The formation of PCC by using the highest PCC rendemen aquabides is 9.28% at optimum temperature of 50°C. With 0.75 M HCl, the highest rendemen is 79.32% at optimum temperature 70°C. The formation of crystals in the form vaterite, aragonite and calcite were evidenced by X-ray Diffraction (XRD). Treatment with 2.00 M HCl at 30°C showed the formation of vaterite (45.83%), aragonite (35.93%) and calcite (18.24%) with crystals size of 28.43 nm. In the other case, preparation with 0.75 M HCl at 30°C resulting the percentage of vaterite and aragonite which were 73.01% and 26.99% respectively fairished 28.06 nm. Then for the one which were treated with 0.75 M HCl at 70°C indicated the formation of vaterite (75.53%) fairished 33.68 nm and aragonite (24.47%). SEM (Scanning Electron Microscopy) towards the sample prepared from 0.75 M HCl at 30°C have clearly shown that the particle sphere fairished at 3.68 nm where the one treated with 0.75 M HCl at 70°C having particle sphere fairished at 3.3 µm showing needle like estimated of 3.8 µm. Keywords : Precipitated Calcium Carbonate (PCC), caustic soda method 

Note on Selection of Coordinate Systems for Geodynamics

1975 ◽  
Vol 26 ◽  
pp. 395-407
Author(s):  
S. Henriksen
Keyword(s):  
Sea Level ◽  
The Other ◽  
Coordinate Systems ◽  
Mean Sea Level ◽  
The Earth ◽  
The One ◽  
Static Systems ◽  
Selection Of

The first question to be answered, in seeking coordinate systems for geodynamics, is: what is geodynamics? The answer is, of course, that geodynamics is that part of geophysics which is concerned with movements of the Earth, as opposed to geostatics which is the physics of the stationary Earth. But as far as we know, there is no stationary Earth – epur sic monere. So geodynamics is actually coextensive with geophysics, and coordinate systems suitable for the one should be suitable for the other. At the present time, there are not many coordinate systems, if any, that can be identified with a static Earth. Certainly the only coordinate of aeronomic (atmospheric) interest is the height, and this is usually either as geodynamic height or as pressure. In oceanology, the most important coordinate is depth, and this, like heights in the atmosphere, is expressed as metric depth from mean sea level, as geodynamic depth, or as pressure. Only for the earth do we find “static” systems in use, ana even here there is real question as to whether the systems are dynamic or static. So it would seem that our answer to the question, of what kind, of coordinate systems are we seeking, must be that we are looking for the same systems as are used in geophysics, and these systems are dynamic in nature already – that is, their definition involvestime.

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.

Radioimmunotherapy for treatment of acute myeloid leukaemia and myelodysplastic syndrome

2005 ◽  
Vol 44 (03) ◽  
pp. 107-117
Author(s):  
R. G. Meyer ◽  
W. Herr ◽  
A. Helisch ◽  
P. Bartenstein ◽  
I. Buchmann
Keyword(s):  
Acute Myeloid Leukaemia ◽  
Myeloid Leukaemia ◽  
Primary Tumour ◽  
The Other ◽  
Haematopoietic Stem Cell ◽  
Other Hand ◽  
Primary Reduction ◽  
The One ◽  
Acute Myeloid

SummaryThe prognosis of patients with acute myeloid leukaemia (AML) has improved considerably by introduction of aggressive consolidation chemotherapy and haematopoietic stem cell transplantation (SCT). Nevertheless, only 20-30% of patients with AML achieve long-term diseasefree survival after SCT. The most common cause of treatment failure is relapse. Additionally, mortality rates are significantly increased by therapy-related causes such as toxicity of chemotherapy and complications of SCT. Including radioimmunotherapies in the treatment of AML and myelodyplastic syndrome (MDS) allows for the achievement of a pronounced antileukaemic effect for the reduction of relapse rates on the one hand. On the other hand, no increase of acute toxicity and later complications should be induced. These effects are important for the primary reduction of tumour cells as well as for the myeloablative conditioning before SCT.This paper provides a systematic and critical review of the currently used radionuclides and immunoconjugates for the treatment of AML and MDS and summarizes the literature on primary tumour cell reductive radioimmunotherapies on the one hand and conditioning radioimmunotherapies before SCT on the other hand.

Das Ende der Postdemokratie, den Pessimismus überwinden.

2017 ◽  
Vol 47 (188) ◽  
pp. 487-494
Author(s):  
Daniel Mullis
Keyword(s):  
Political Thought ◽  
Social Dynamics ◽  
Social Conditions ◽  
The Other ◽  
Economic Decline ◽  
Far Right ◽  
Windows Of Opportunity ◽  
Political Events ◽  
Political Struggles ◽  
The One

In recent years, political and social conditions have changed dramatically. Many analyses help to capture these dynamics. However, they produce political pessimism: on the one hand there is the image of regression and on the other, a direct link is made between socio-economic decline and the rise of the far-right. To counter these aspects, this article argues that current political events are to be understood less as ‘regression’ but rather as a moment of movement and the return of deep political struggles. Referring to Jacques Ranciere’s political thought, the current conditions can be captured as the ‘end of post-democracy’. This approach changes the perspective on current social dynamics in a productive way. It allows for an emphasis on movement and the recognition of the windows of opportunity for emancipatory struggles.

Tolerance is theoretical and practical principles

1996 ◽  
pp. 13-23
Author(s):  
Mykhailo Babiy
Keyword(s):  
Religious Diversity ◽  
The Other ◽  
Nodal Points ◽  
Characteristic Features ◽  
The One ◽  
Ukrainian Society

Political ideological pluralism, religious diversity are characteristic features of modern Ukrainian society. On the one hand, multiculturalism, socio-political, religious differentiation of the latter appear as important characteristics of its democracy, as a practical expression of freedom, on the other - as a factor that led to the deconsocialization of society, gave rise to "nodal points" of tension, confrontational processes, in particular, in political and religious spheres.

The Salvage of Ideas: Schumpeter and the Core Problems Still Confronting Economics

2003 ◽  
pp. 15-26
Author(s):  
P. Wynarczyk
Keyword(s):  
The Other ◽  
The Core ◽  
Other Hand ◽  
The One

Two aspects of Schumpeter' legacy are analyzed in the article. On the one hand, he can be viewed as the custodian of the neoclassical harvest supplementing to its stock of inherited knowledge. On the other hand, the innovative character of his works is emphasized that allows to consider him a proponent of hetherodoxy. It is stressed that Schumpeter's revolutionary challenge can lead to radical changes in modern economics.

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