scholarly journals Mineral Cycling and pH Gradient Related with Biological Activity under Transient Anoxic–Oxic Conditions: Effect on P Mobility in Volcanic Lake Sediments

2014 ◽  
Vol 48 (16) ◽  
pp. 9205-9210 ◽  
Author(s):  
D. C. Ribeiro ◽  
G. Martins ◽  
R. Nogueira ◽  
A. G. Brito
Keyword(s):  
Biological Activity ◽  
Lake Sediments ◽  
Ph Gradient ◽  
Volcanic Lake ◽  
Mineral Cycling

scholarly journals pH Gradient-Induced Heterogeneity of Fe(III)-Reducing Microorganisms in Coal Mining-Associated Lake Sediments

2008 ◽  
Vol 74 (22) ◽  
pp. 7100-7100
Author(s):  
Marco Blöthe ◽  
Denise M. Akob ◽  
Joel E. Kostka ◽  
Kathrin Göschel ◽  
Harold L. Drake ◽  
...  
Keyword(s):  
Lake Sediments ◽  
Coal Mining ◽  
Ph Gradient

Heterogeneity of human lutropin. Detection and identification of α- and β-subunits

1985 ◽  
Vol 110 (2) ◽  
pp. 182-192 ◽  
Author(s):  
L. A. van Ginkel ◽  
J. G. Loeber
Keyword(s):  
Biological Activity ◽  
Isoelectric Focusing ◽  
Biologically Active ◽  
Ph Gradient ◽  
Β Subunit ◽  
Active Components ◽  
Α Subunit ◽  
Relative Response ◽  
Detection And Identification

Abstract. A highly purified LH preparation, prepared from human pituitaries (NM14) was studied using immunochemical and in vitro biological techniques. Using isoelectric focusing 5 different biologically active components could be detected, 4 of which were located between pH = 7.0 and 8.6, one was located at pH = 4.9. The biological activity in the acidic part of the pH gradient is probably due to the formation of an artefact during storage in solution. The experiments were performed with special emphasis on the occurrence of LH subunits, for which until now no pI-values have been reported. Using specific radioimmunochemical (RIA) systems at least 7 different α-subunit components and 4 different β-subunit components could be detected. The presence of even more components is likely. The α-subunit components, with pI-values of: 4.6, 5.2, 6.0, 7.1, 8.1, 8.8 and 9.7, were located spread over the entire pH-gradient whereas all β-subunit components were located above pH = 7.5, the pI-values being 7.7, 8.4, 8.5 and 10.4. The identification of these components as α- or β-subunit was based on the relative response in the different RIA systems, the absence of biological activity and the response changes during incubation at 37°C. Refocusing of the above mentioned biologically active components individually resulted each time in a single component with a pI-value identical to its corresponding 'parent'. After incubation at 37°C of these components each time the same variety of subunit components was found with discrete pI-values, identical to those above.

Volcanic Lake Sediments as Sensitive Archives of Climate and Environmental Change

2015 ◽  
pp. 379-399 ◽  
Author(s):  
Aldo Marchetto ◽  
Daniel Ariztegui ◽  
Achim Brauer ◽  
Andrea Lami ◽  
Anna Maria Mercuri ◽  
...  
Keyword(s):  
Environmental Change ◽  
Lake Sediments ◽  
Volcanic Lake ◽  
Climate And Environmental Change

scholarly journals Phosphorus fractionation in volcanic lake sediments (Azores – Portugal)

Chemosphere ◽  
2008 ◽  
Vol 70 (7) ◽  
pp. 1256-1263 ◽  
Author(s):  
D.C. Ribeiro ◽  
G. Martins ◽  
R. Nogueira ◽  
J.V. Cruz ◽  
A.G. Brito
Keyword(s):  
Lake Sediments ◽  
Phosphorus Fractionation ◽  
Volcanic Lake

Virus-Like Particles in a Human Breast Cancer: Structural Similarity to Previously Reported Particles

1973 ◽  
Vol 31 ◽  
pp. 378-379
Author(s):  
G. Kasnic ◽  
S. E. Stewart ◽  
C. Urbanski
Keyword(s):  
Breast Cancer ◽  
Biological Activity ◽  
Human Breast Cancer ◽  
Osteogenic Sarcoma ◽  
Human Tumor ◽  
Structural Similarity ◽  
Cell Tumor ◽  
Human Breast ◽  
Human Tumor Cell ◽  
Type Particle

We have reported the maturation of an intracisternal A-type particle in murine plasma cell tumor cultures and three human tumor cell cultures (rhabdomyosarcoma, lung adenocarcinoma, and osteogenic sarcoma) after IUDR-DMSO activation. In all of these studies the A-type particle seems to develop into a form with an electron dense nucleoid, presumably mature, which is also intracisternal. A similar intracisternal A-type particle has been described in leukemic guinea pigs. Although no biological activity has yet been demonstrated for these particles, on morphologic grounds, and by the manner in which they develop within the cell, they may represent members of the same family of viruses.

Effects of Vincristine on Endothelial Microtubules in the Spinal Cord

1976 ◽  
Vol 34 ◽  
pp. 58-59
Author(s):  
John L. Beggs ◽  
John D. Waggener ◽  
Wanda Miller
Keyword(s):  
Spinal Cord ◽  
Biological Activity ◽  
Horseradish Peroxidase ◽  
Transport Mechanism ◽  
Vasogenic Edema ◽  
Vesicular Transport ◽  
Close Proximity

Microtubules (MT) are versatile organelles participating in a wide variety of biological activity. MT involvement in the movement and transport of cytoplasmic components has been well documented. In the course of our study on trauma-induced vasogenic edema in the spinal cord we have concluded that endothelial vesicles contribute to the edema process. Using horseradish peroxidase as a vascular tracer, labeled endothelial vesicles were present in all situations expected if a vesicular transport mechanism was in operation. Frequently,labeled vesicles coalesced to form channels that appeared to traverse the endothelium. The presence of MT in close proximity to labeled vesicles sugg ested that MT may play a role in vesicular activity.

Isothiazol-3(2 H )-ones, Part I: Synthesis, Reactions and Biological Activity

2002 ◽  
Vol 23 (1) ◽  
pp. 79-121 ◽  
Author(s):  
Kathleen Taubert ◽  
Susanne Kraus ◽  
Bärbel Schulze
Keyword(s):  
Biological Activity ◽  
Synthesis Reactions

Influence of liming on metal burdens in lake sediments

2003 ◽  
Vol 107 ◽  
pp. 1349-1351
Author(s):  
T. Wällstedt ◽  
H. Borg
Keyword(s):  
Lake Sediments

Evaluation of biological activity of lignans extracted from tree knots

Planta Medica ◽  
2008 ◽  
Vol 74 (09) ◽  
Author(s):  
E Spilioti ◽  
B Holmbom ◽  
P Moutsatsou
Keyword(s):  
Biological Activity
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