Relationship of Oil Volatility to Oil Thickening Performance Tests

1972 ◽  
Author(s):  
David T. Clark
Keyword(s):  
Performance Tests ◽  
Oil Thickening ◽  
Relationship Of

Study of the structure-activity relationship of metallocene poly-α-olefin (mPAO) base oil

2021 ◽  
Author(s):  
Jia Yuan Xue ◽  
Su Qing Dong ◽  
Puke Mi ◽  
Li Bo Wang ◽  
Si Han Wang ◽  
...  
Keyword(s):  
Activity Relationship ◽  
Metallocene Catalysts ◽  
Performance Tests ◽  
Base Oil ◽  
Base Oils ◽  
Low Viscosity ◽  
Structure Activity ◽  
And Performance ◽  
Chain Lengths ◽  
Relationship Of

In this paper, α-olefins with different chain lengths are used as monomers, and metallocene catalysts were used to prepare low-viscosity poly-α-olefin (mPAO) lubricating base oils. Structure and performance tests were...

scholarly journals THE RELATIONSHIP OF READING INTEREST AND LEARNING MOTIVATION WITH NEWS WRITING SKILLS OF GRADE VIII STUDENTS SMP N 24 PADANG

2015 ◽  
Vol 16 (1) ◽  
pp. 79
Author(s):  
Ria Ria ◽  
Atmazaki Atmazaki ◽  
Abdurahman Abdurahman
Keyword(s):  
Significant Relationship ◽  
Random Sampling ◽  
Writing Skills ◽  
Learning Motivation ◽  
Performance Tests ◽  
Writing Skill ◽  
News Writing ◽  
Relationship Of ◽  
The Relationship ◽  
Reading Interest

HUBUNGAN MINAT BACA DAN MOTIVASI BELAJAR DENGAN KETERAMPILAN MENULIS BERITA SISWA KELAS VIII SMP NEGERI 24 PADANGAbstractThis study aims to explain the following. First, the relationship of reading interest, news writing skill of grade VIII students SMP Negeri 24 Padang. Secondly, the relationship between learning motivation with news writing skills of grade VIII students. Third, the relationship between reading interest and learning motivation with news writing skills of grade VIII students. The population was grade VIII students. Samples are 40 students grade VIII students SMP Negeri 24 Padang performed using proportional random sampling technique. Data were collected through questionnaires and performance tests. Questionnaire was used to see interest in reading and students' motivation, while performance tests conducted to determine the outcome of news writing skills of students. Analysis and discussion of the data is done in accordance with the concept of descriptive correlational study. Based on the research conducted can be summarized as the follows. First, there is a significant correlation between reading interest, the news writing skills of grade VIII students SMP Negeri 24 Padang. Secondly, there is a significant relationship between learning motivation and news writing skill of grade VIII students. Third, there is a significant relationship between interest in reading and learning motivation together with news writing skills students.Key Words: reading, learning motivation, news writing skills AbstractPenelitian ini bertujuan untuk menjelaskan hal-hal berikut. Pertama, hubungan minat baca, keterampilan menulis berita siswa kelas VIII SMP Negeri 24 Padang. Kedua, hubungan antara motivasi belajar dengan kemampuan menulis berita siswa kelas VIII. Ketiga, hubungan antara minat membaca dan motivasi belajar dengan keterampilan menulis berita siswa kelas VIII. Populasi siswa kelas VIII. Sampel sebanyak 40 siswa kelas VIII SMP Negeri 24 Padang dilakukan dengan teknik proportional random sampling. Data dikumpulkan melalui kuesioner dan tes kinerja. Kuesioner tersebut digunakan untuk melihat minat membaca dan motivasi siswa, sedangkan tes kinerja dilakukan untuk mengetahui hasil keterampilan menulis berita siswa. Analisis dan pembahasan data dilakukan sesuai dengan konsep deskriptif korelasional. Berdasarkan penelitian yang dilakukan dapat diringkas sebagai berikut. Pertama, ada hubungan yang signifikan antara minat membaca, keterampilan menulis berita siswa kelas VIII SMP Negeri 24 Padang. Kedua, ada hubungan yang signifikan antara motivasi belajar dan keterampilan menulis berita siswa kelas VIII. Ketiga, ada hubungan yang signifikan antara minat baca dan motivasi belajar bersama dengan kemampuan menulis berita siswa.Kata kunci: membaca, motivasi belajar, keterampilan menulis berita

scholarly journals The Impact of Hockey Coaches and Team Cohesion on the Performance of Players

2016 ◽  
Vol 12 (4) ◽  
pp. 74
Author(s):  
Abd Rahim Bin Mohd Shariff ◽  
Saeed Javed ◽  
Norkhalid Salimin
Keyword(s):  
Field Performance ◽  
Technical Skills ◽  
Primary Objective ◽  
Team Cohesion ◽  
Performance Tests ◽  
Field Hockey ◽  
Hockey Players ◽  
Secondary Objective ◽  
Relationship Of ◽  
The Impact

<p>The primary objective of the existing paper deals with to examine the relationship of hockey coaches and team cohesion with the performance of field hockey players of Pakistan and their impact on players’ performance. However the secondary objective was to measure the field performance of hockey players on practical measures. The research methodology is based on both descriptive and inferential statistical approaches. The descriptive data was collected in the form of field performance tests (technical skills and fitness capabilities) while the inferential data perceived by players was collected using survey questionnaire. A number of 296 national field hockey players of Pakistan were selected from 14 national departments of field hockey as samples. Descriptive statistics, correlation and multiple regression analysis were employed through SPSS (version 21.0). The results of the field performance tests were found below than average (weaker) in technical skills and fitness capabilities of national field hockey players of Pakistan. However, the findings of the inferential analysis revealed that hockey coaches and team cohesion have positive and significant relationships with the performance of field hockey players. Implications of existing study were also briefed.<strong></strong></p>

Standardized Tests for Visually Handicapped Children: A Review of Research

1976 ◽  
Vol 70 (6) ◽  
pp. 232-236
Author(s):  
Thomas E. Coveny
Keyword(s):  
Academic Performance ◽  
Recent Work ◽  
Standardized Tests ◽  
Performance Tests ◽  
Handicapped Children ◽  
And Performance ◽  
Visually Handicapped ◽  
Relationship Of ◽  
The Relationship ◽  
Early Developmental

Research concerning the adaptation and development of tests for visually handicapped children is reviewed. Early developmental work with verbal tests is examined as well as the more recent work undertaken to develop performance type tests. Finally, work on the validation of both verbal and performance tests, as well as the relationship of such tests to academic performance, is described.

The relationship of the scleractinian corals to the rugose corals

Paleobiology ◽  
1980 ◽  
Vol 6 (02) ◽  
pp. 146-160 ◽  
Author(s):  
William A. Oliver
Keyword(s):  
Critical Points ◽  
Scleractinian Corals ◽  
Convincing Evidence ◽  
Early Triassic ◽  
Rugose Corals ◽  
History Of ◽  
The Subject ◽  
Relationship Of ◽  
The Relationship ◽  
Biologic Factors

The Mesozoic-Cenozoic coral Order Scleractinia has been suggested to have originated or evolved (1) by direct descent from the Paleozoic Order Rugosa or (2) by the development of a skeleton in members of one of the anemone groups that probably have existed throughout Phanerozoic time. In spite of much work on the subject, advocates of the direct descent hypothesis have failed to find convincing evidence of this relationship. Critical points are:(1) Rugosan septal insertion is serial; Scleractinian insertion is cyclic; no intermediate stages have been demonstrated. Apparent intermediates are Scleractinia having bilateral cyclic insertion or teratological Rugosa.(2) There is convincing evidence that the skeletons of many Rugosa were calcitic and none are known to be or to have been aragonitic. In contrast, the skeletons of all living Scleractinia are aragonitic and there is evidence that fossil Scleractinia were aragonitic also. The mineralogic difference is almost certainly due to intrinsic biologic factors.(3) No early Triassic corals of either group are known. This fact is not compelling (by itself) but is important in connection with points 1 and 2, because, given direct descent, both changes took place during this only stage in the history of the two groups in which there are no known corals.

Skeletal elements of crinoid echinoderms: High-resolution structural and microanalytical results

1983 ◽  
Vol 41 ◽  
pp. 194-195
Author(s):  
D. F. Blake ◽  
L. F. Allard ◽  
D. R. Peacor
Keyword(s):  
High Resolution ◽  
Marine Invertebrates ◽  
Sea Urchins ◽  
Structural Features ◽  
Sea Stars ◽  
High Resolution Tem ◽  
Relationship Of ◽  
The Relationship ◽  
Insight Into

Echinodermata is a phylum of marine invertebrates which has been extant since Cambrian time (c.a. 500 m.y. before the present). Modern examples of echinoderms include sea urchins, sea stars, and sea lilies (crinoids). The endoskeletons of echinoderms are composed of plates or ossicles (Fig. 1) which are with few exceptions, porous, single crystals of high-magnesian calcite. Despite their single crystal nature, fracture surfaces do not exhibit the near-perfect {10.4} cleavage characteristic of inorganic calcite. This paradoxical mix of biogenic and inorganic features has prompted much recent work on echinoderm skeletal crystallography. Furthermore, fossil echinoderm hard parts comprise a volumetrically significant portion of some marine limestones sequences. The ultrastructural and microchemical characterization of modern skeletal material should lend insight into: 1). The nature of the biogenic processes involved, for example, the relationship of Mg heterogeneity to morphological and structural features in modern echinoderm material, and 2). The nature of the diagenetic changes undergone by their ancient, fossilized counterparts. In this study, high resolution TEM (HRTEM), high voltage TEM (HVTEM), and STEM microanalysis are used to characterize tha ultrastructural and microchemical composition of skeletal elements of the modern crinoid Neocrinus blakei.

Studies on Leukemogenic and Sarcomagenic Viruses

1970 ◽  
Vol 28 ◽  
pp. 156-157
Author(s):  
Leon Dmochowski
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Morphological Properties ◽  
Mode Of Development ◽  
Relationship Of ◽  
The Relationship

Electron microscopy has proved to be an invaluable discipline in studies on the relationship of viruses to the origin of leukemia, sarcoma, and other types of tumors in animals and man. The successful cell-free transmission of leukemia and sarcoma in mice, rats, hamsters, and cats, interpreted as due to a virus or viruses, was proved to be due to a virus on the basis of electron microscope studies. These studies demonstrated that all the types of neoplasia in animals of the species examined are produced by a virus of certain characteristic morphological properties similar, if not identical, in the mode of development in all types of neoplasia in animals, as shown in Fig. 1.

The relationship of IGE receptor topography to signaling activity in RBL-2H3 mast cells

1991 ◽  
Vol 49 ◽  
pp. 236-237
Author(s):  
J.R. Pfeiffer ◽  
J.C. Seagrave ◽  
C. Wofsy ◽  
J.M. Oliver
Keyword(s):  
Mast Cells ◽  
Protein A ◽  
Scattered Electron ◽  
Ige Receptor ◽  
Receptor Complexes ◽  
Ige Binding ◽  
Electron Imaging ◽  
Small Clusters ◽  
Relationship Of ◽  
The Relationship

In RBL-2H3 rat leukemic mast cells, crosslinking IgE-receptor complexes with anti-IgE antibody leads to degranulation. Receptor crosslinking also stimulates the redistribution of receptors on the cell surface, a process that can be observed by labeling the anti-IgE with 15 nm protein A-gold particles as described in Stump et al. (1989), followed by back-scattered electron imaging (BEI) in the scanning electron microscope. We report that anti-IgE binding stimulates the redistribution of IgE-receptor complexes at 37“C from a dispersed topography (singlets and doublets; S/D) to distributions dominated sequentially by short chains, small clusters and large aggregates of crosslinked receptors. These patterns can be observed (Figure 1), quantified (Figure 2) and analyzed statistically. Cells incubated with 1 μg/ml anti-IgE, a concentration that stimulates maximum net secretion, redistribute receptors as far as chains and small clusters during a 15 min incubation period. At 3 and 10 μg/ml anti-IgE, net secretion is reduced and the majority of receptors redistribute rapidly into clusters and large aggregates.

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