Shallow Groove Shafts and Locking Devices for Bearing Retaining Spanner Nuts

2018 ◽  
Author(s):  
Keyword(s):  
Shallow Groove

scholarly journals X. On the existence of a rudimentary head-kidney in the embryo chick

1878 ◽  
Vol 27 (185-189) ◽  
pp. 443-446 ◽  
Keyword(s):  
Head Kidney ◽  
Wolffian Duct ◽  
Germinal Epithelium ◽  
Mullerian Duct ◽  
Short Account ◽  
Müllerian Duct ◽  
Front End ◽  
Wolffian Body ◽  
Embryo Chick ◽  
Shallow Groove

We have been for some time engaged in an investigation on the mode of growth of the developing Müllerian duct in the chick, and its possible derivation from the Wolffian duct; and, while carrying on our investigations on this point, were struck by some remarkable features of the abdominal opening of the Müllerian duct in its very early condition. We did not for some time pay much attention to these features, but finally devoted ourselves to their interpretation, and have been led to the conclusion that they form the rudiment of a head-kidney, “Vomiere” or “Kopfniere,” identical with that present in Amphibia, Marsipobranchii, and Teleostei. We purpose first to give a short account of our observations,, and then to proceed to state the grounds on which we have been led to compare the structures we have found with the head-kidney of the Ichthyopsida The first trace of the Müllerian duct we have met with is a very shallow groove in the germinal epithelium some little way behind the front end of the Wolffian body, and nearly overlying, though slightly external to, the Wolffian duct. This stage corresponds with the earliest stage described by Dr. Gasser. In the next stage, which follows very closely upon the first one, remarkable changes have taken place in the groove, which can best be explained by describing the appearance of a series of successive sections from before backwards through the groove and its continuation.

scholarly journals Antibacterial effects of protruding and recessed shark skin micropatterned surfaces of polyacrylate plate with a shallow groove

2014 ◽  
Vol 361 (1) ◽  
pp. 10-16 ◽  
Author(s):  
Akihiko Sakamoto ◽  
Yusuke Terui ◽  
Chihiro Horie ◽  
Takashi Fukui ◽  
Toshiyuki Masuzawa ◽  
...  
Keyword(s):  
Antibacterial Effects ◽  
Shark Skin ◽  
Shallow Groove

Novel Paromamine Derivatives Exploring Shallow-Groove Recognition of Ribosomal-Decoding-Site RNA.

ChemInform ◽  
2003 ◽  
Vol 34 (6) ◽  
Author(s):  
Klaus B. Simonsen ◽  
Benjamin K. Ayida ◽  
Dionisios Vourloumis ◽  
Masayuki Takahashi ◽  
Geoffrey C. Winters ◽  
...  
Keyword(s):  
Shallow Groove

Physical and morphometric characteristics of Gangatiri cattle

2016 ◽  
Author(s):  
Basant Kumar Bhinchhar ◽  
Vinod Kumar Paswan ◽  
Satya Prakash Yadav ◽  
SPACE Saroj ◽  
Prity Singh
Keyword(s):  
Uttar Pradesh ◽  
Medium Size ◽  
Average Height ◽  
Body Parts ◽  
Indigenous Cattle ◽  
Face Width ◽  
Face Length ◽  
River Ganga ◽  
Shallow Groove ◽  
Eastern Uttar Pradesh

Gangatiri cattle are mainly found in the adjacent areas of the river Ganga in eastern Uttar Pradesh (Chandauli, Ghazipur, Varanasi, Mirzapur and Ballia districts) and adjacent Bhabhua (Kaimoor), Buxar, Arrah and Chhapra areas of Bihar. The breeding tract of this breed includes mainly Ballia and Ghazipur districts of Uttar Pradesh and Rohtas and Shahbad Districts of Bihar. Present study was conducted on 114 Gangatiri cattle - an indigenous cattle herd - maintained at Surbhi Shodh Sansthan (Geeta Goshala), Dagmagpur, Mirzapur, Uttar Pradesh- to study the physical and morphometric characterstics. White colour was the most prominant colour in the population. Colour of coat, forehead and neck was white and eyelid, tail and hoof were black in 65.78, 76.31, 63.15, 66.66, 82.45 and 76.31 % of animals, respectively. Hair was mainly straight type (97.10 %) but 2.90 % of the animals also had curly type of hair. Medium size muzzle was present in 79.71 % of the animals while it was small and large sized in 11.59 and 8.69 % of animals, respectively. Shades of grey were also present on different body parts of these animals. Grey colour was the second most prominant colour in the population. Majority of animals have shallow groove in middle head (57.97 %). Poll was prominent in 92.75 % of the population. Forehead was straight type in almost 78.26 % of these animals. Most of the adult animal population (72.46 %) was having medium body size. The average height at wither, body length, heart girth, face length, face width, neck length, ear length, fore cannon bone girth, height at hip bone, height at pin bone, rump slope and rump length were 117.12±1.23, 108.06±0.90, 145.50±1.80, 30.14±0.86, 15.48±0.43, 47.07±1.25, 19.99±0.56, 15.65±0.40, 117.78±1.16, 105.25±1.10, 12.47±0.16 and 35.56±0.65 cm, respectively.

1.5 μm monolithic shallow-groove coupled-cavity vapour phase transported buried heterostructure lasers

1984 ◽  
Vol 20 (24) ◽  
pp. 1001 ◽  
Author(s):  
T.L. Koch ◽  
L.A. Coldren ◽  
T.J. Bridges ◽  
E.G. Burkhardt ◽  
P.J. Corvini ◽  
...  
Keyword(s):  
Vapour Phase ◽  
Buried Heterostructure ◽  
Shallow Groove ◽  
Coupled Cavity

Numerical Analysis of General Groove Geometry for Dry Gas Seals

2013 ◽  
Vol 457-458 ◽  
pp. 544-551
Author(s):  
Ji Bin Hu ◽  
Wen Jin Tao ◽  
Yi Min Zhao ◽  
Chao Wei
Keyword(s):  
Numerical Model ◽  
Hydrodynamic Pressure ◽  
Computational Domain ◽  
System Transformation ◽  
Modeling And Analysis ◽  
Gas Seals ◽  
Groove Seal ◽  
Shallow Groove ◽  
Regular Region ◽  
Volume Method

By Changing the key points on the spiral curve, general groove geometry was determined. Considering the simplicity of modeling and analysis, cubic spline function was used to express the general groove profile. By using the boundary fitted coordinate system transformation, irregular computational domain was transferred to regular region; Based on flow conservation principle, finite volume method was applied to discrete compressible Reynolds equation; By the application of Newton-Raphson iteration method for solving algebraic equation, numerical model of general groove dry gas seals was established. When compared sample results with shallow groove theory, the capacity and stiffness of numerical results match well with theoretical ones, verifying the accuracy of novel numerical model. Through analysis of three typical groove seals, spiral groove seal has strongest carrying capacity. Pressure distribution of three groove seals subjects to the law of hydrodynamic pressure effect. And the numerical model established in this paper will offer a general calculate platform for optimization of groove geometry in the future.

scholarly journals ELECTRON MICROSCOPE STUDY OF MITOCHONDRIAL 60S AND CYTOPLASMIC 80S RIBOSOMES FROM LOCUSTA MIGRATORIA

1974 ◽  
Vol 62 (3) ◽  
pp. 860-875 ◽  
Author(s):  
W. Kleinow ◽  
W. Neupert ◽  
F. Miller
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope Study ◽  
Flight Muscle ◽  
Locusta Migratoria ◽  
Volume Ratio ◽  
Negative Staining ◽  
Mitochondrial Ribosomes ◽  
Tissue Sections ◽  
Shallow Groove ◽  
Cytoplasmic Ribosomes

Purified mitochondrial ribosomes (60S) have been isolated from locust flight muscle. Purification could be achieved after lysis of mitochondria in 0.055 M MgCl2. Mitochondrial 60S and cytoplasmic 80S ribosomes were investigated by electron microscopy in tissue sections, in sections of pellets of isolated ribosomes, and by negative staining of ribosomal suspensions. In negatively stained preparations, mitochondrial ribosomes show dimensions of ∼270 x 210 x 215 Å; cytoplasmic ribosomes measure ∼295 x 245 x 255 Å. From these values a volume ratio of mitochondrial to cytoplasmic ribosomes of 1: 1.5 was estimated. Despite their different sedimentation constants, mitochondrial ribosomes after negative staining show a morphology similar to that of cytoplasmic ribosomes. Both types of particles show bipartite profiles which are interpreted as "frontal views" and "lateral views." In contrast to measurements on negatively stained particles, the diameter of mitochondrial ribosomes in tissue sections is ∼130 Å, while the diameter of cytoplasmic ribosomes is ∼ 180–200 Å. These data suggest a volume ratio of mitochondrial to cytoplasmic ribosomes of 1:3. Subunits of mitochondrial ribosomes (40S and 25S) were obtained by incubation under dissociating conditions before fixation in glutaraldehyde. After negative staining, mitochondrial large (40S) subunits show rounded profiles with a shallow groove on a flattened side of the profile. Mitochondrial small subunits (25S) display elongated, triangular profiles.

Peculiar Wooden Tubes from Southeastern Oregon

1940 ◽  
Vol 6 (1) ◽  
pp. 75-76 ◽  
Author(s):  
Robin Drews
Keyword(s):  
Mature Wood ◽  
Shallow Groove

During excavations in Catlow valley, southeastern Oregon, by the Department of Anthropology, University of Oregon, in the summers of 1937 and 1938, there were foundseven peculiar wooden tubes, each with a shallow groove around one or both ends. The specimens, shown in Fig. 10, range in size from No. 7 which is 5.3 cm. long by .5 cm. in diameter, to No. 3 which is 10.0 cm. long and .7 cm. in diameter. The largest from the standpoint of bulk is No. 5 which is 8.8 cm. long and 1.2 cm. in diameter. This specimen is the only one made from mature wood and not from short sections cut from small annual shoots. In each case the pith has been removed, leaving a clean bore the length of the section. No. 6, one of the most poorly made, apparently was never finished because the pith was never cleaned out, though it is evident that several small sticks were broken off during the attempt.

Consumable and Process Improvement for Large Copper Wire Bonding

2016 ◽  
Vol 2016 (1) ◽  
pp. 000445-000449
Author(s):  
Tao Xu ◽  
Todd Walker ◽  
Bernard Poncelet ◽  
Jason Fu ◽  
Christoph Luechinger
Keyword(s):  
Process Improvement ◽  
Copper Wire ◽  
Tool Material ◽  
Groove Depth ◽  
Opening Angle ◽  
Bond Performance ◽  
Wire Bonds ◽  
Copper Wire Bonding ◽  
Tool Wear Mechanism ◽  
Shallow Groove

Abstract Aluminum (Al) wire has certain limitations and cannot satisfy the increased demands for power electronics interconnects. Copper (Cu) wire has many benefits and is replacing Al wire in high power, high temperature applications. Cu wire is much harder and wears the bond tool much faster than Al wire. Consumable lifetime and process stability have to be improved so that Cu wire interconnect can be accepted for mass production. The bond tool wear mechanism is investigated. Bond process parameter, bond tool tip geometry, and bond tool material affect bond tool lifetime and bond performance. By combining the bond tool tip design and bond process optimization, an ultra-shallow groove bond tool that has a groove depth (GD) of 40% wire diameter achieved producing 260,000 Cu wire bonds. The groove opening angle (GOA) affects wire confine capability of a bond tool and a larger GOA is preferred for bond tools with a shallower GD. Alternative bond tool material shows benefits of improving bond appearance and further extending bond tool lifetime.

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