scholarly journals Lithological models of reservoir rocks for upper cretaceous deposits in East Caucasian Region

Georesursy ◽  
2021 ◽  
Vol 23 (3) ◽  
pp. 83-89
Author(s):  
Оlga V. Sivalneva ◽  
Aysylu S. Rakhmatullina ◽  
Аlexander V. Postnikov ◽  
Olga V. Postnikova ◽  
Оlga А. Zueva ◽  
...  
Keyword(s):  
Upper Cretaceous ◽  
Thin Sections ◽  
Reservoir Rocks ◽  
Depositional Settings ◽  
Fracture Intensity ◽  
Main Factors ◽  
Late Diagenesis ◽  
Cretaceous Deposits

The article describes the results of lithological and petrophysical investigations that would be a base for characterization of reservoir rocks in Upper Cretaceous deposits. These investigations include thin sections description, SEM and NMR analysis. As found that three main factors have constrained final quality of reservoir rocks: 1) depositional settings favorable for coccoliths and chalk sedimentation; 2) late diagenesis changes – compaction and recrystallization degree; 3) fracture intensity.

scholarly journals PARTICULARS APPLICATION OF DUCTILE IRON CASTINGS

2014 ◽  
Author(s):  
Larisa Ivanovna Putyatina ◽  
Larisa Andreevna Timofeeva
Keyword(s):  
Heat Treatment ◽  
Ductile Iron ◽  
Thin Sections ◽  
Iron Castings ◽  
Lamellar Graphite ◽  
Main Factors ◽  
Relationship Of ◽  
The Relationship ◽  
Free Cementite

The results of analysis of the relationship of structure and mechanical properties of ductile cast ironpots with globular graphite form, experience and perspectives of their industrial application. It is shown thatthe growth in the production of castings of ductile iron is caused exclusively by a favorable combination ofphysical, mechanical, operational and technological properties of this material, as well as economicconsiderations.The main factors regulating the cast structure and level of physical, mechanical and operationalcharacteristics of ductile iron are: the quality of the initial melt modification modes (including composition,quantity, method and sequence of input and additives), chemical composition and rate of solidification of themetal.Heat treatment of ductile iron is more effective than iron with lamellar graphite , since graphitespherical than weakens the metal substrate than the plate . Castings from nodular iron are exposed tovarious types of heat treatment. The purpose of heat treatment - structurally free cementite decomposition inrelatively thin sections of the casting ( graphitizing joke ) or hardening of pearlite matrix ( normalization).Can be used combined heat treatment, the purpose of pursuing the expansion of structurally free cementitewith subsequent normalization.

Ultrastructural Characterization of 18-24 Hr. Neurospora Crassa Hyphae by Freeze-Fracture Techniques

1977 ◽  
Vol 35 ◽  
pp. 604-605
Author(s):  
K. S. Howard ◽  
M. D. Socolofsky ◽  
H. D. Braymer ◽  
P. R. Clisham
Keyword(s):  
Neurospora Crassa ◽  
Phosphate Buffer ◽  
Original Work ◽  
Freeze Fracture ◽  
Glutaraldehyde Fixation ◽  
Thin Sections ◽  
Section Technique ◽  
Ultrastructural Characterization

The ultrastructure of Neurospora crassa hyphae has been characterized primarily by the thin section technique. Since the original work of Shatkin and Tatum1, however, the quality of thin sections has been hindered by difficulty in fixing, embedding, and staining. A recent study of N. crassa ascospores compared the ultrastructure as revealed by freeze-etch to that revealed by thin sections, demonstrating the utility of the freeze-etch method when applied to organisms that have been difficult to prepare for EM observation2. The present study applies freeze-fracture to II. crassa in an attempt to confirm and increase the ultrastructural information presently available.Neurospora crassa strains 73a and 74A were grown in Vogel's minimal citrate medium for 18 to 24 hours. The resultant hyphae were treated with 3% glutaraldehyde in 0.1 M phosphate buffer for 2 hours followed by immersion in 30% glycerol for 1 hour or transferred directly to 30% glycerol from growth medium without glutaraldehyde fixation.

Angiosperm wood from the Upper Cretaceous (Coniacian) of British Columbia, Canada

IAWA Journal ◽  
2017 ◽  
Vol 38 (2) ◽  
pp. 141-161 ◽  
Author(s):  
Nathan A. Jud ◽  
Elisabeth A. Wheeler ◽  
Gar W. Rothwell ◽  
Ruth A. Stockey
Keyword(s):  
British Columbia ◽  
North America ◽  
Late Cretaceous ◽  
Upper Cretaceous ◽  
Vancouver Island ◽  
Growth Rings ◽  
Thin Sections ◽  
Marine Deposits ◽  
Dry Wood ◽  
Cretaceous Deposits

Fossil angiosperm wood was collected from shallow marine deposits in the Upper Cretaceous (Coniacian) Comox Formation on Vancouver Island, British Columbia, Canada. The largest specimen is a log at least 2 m long and 38 cm in diameter. Thin sections from a sample of this log reveal diffuseporous wood with indistinct growth rings and anatomy similar toParaphyllanthoxylon. Occasional idioblasts with dark contents in the rays distinguish this wood from previously knownParaphyllanthoxylonspecies and suggest affinity with Lauraceae. The log also includes galleries filled with dry-wood termite coprolites. This trunk reveals the presence of tree-sized angiosperms in what is now British Columbia, and the association of dry-wood termites with angiosperm woods by the Coniacian (89 Ma). To understand the significance of this discovery, we reviewed the record of Cretaceous woods from North America. Our analysis of the distribution of fossil wood occurrences from Cretaceous deposits supports the conclusion that there was a strong latitudinal gradient in both the size and distribution of angiosperm trees during the Late Cretaceous, with no reports of Cretaceous angiosperm trees north of 50°N paleo-latitude in North America. The rarity of angiosperm wood in the Cretaceous has long been used to support the idea that flowering plants were generally of low-stature for much of the Cretaceous; however, large-stature trees withParaphyllanthoxylon-like wood anatomy were widespread at lower–middle paleo-latitudes at least in North America during the Late Cretaceous. Thus, the presence of a largeParaphyllanthoxylonlog in the Comox Formation suggests that Vancouver Island has moved significantly northward since the Coniacian as indicated by other geological and paleobotanical studies.

The Immuno-Electron Microscopic Localization of the Mo-Fe Protein Component of Nitrogenase in Cells of Azotobacter Vinelandii

1973 ◽  
Vol 31 ◽  
pp. 574-575
Author(s):  
J. T. Stasny ◽  
R. C. Burns ◽  
R. W. F. Hardy
Keyword(s):  
Cellular Localization ◽  
Direct Evidence ◽  
Azotobacter Vinelandii ◽  
Intracellular Localization ◽  
Protein Component ◽  
Electron Microscopic ◽  
Thin Sections ◽  
Fe Protein ◽  
Intracytoplasmic Membranes

Structure-functlon studies of biological N2-fixation have correlated the presence of the enzyme nitrogenase with increased numbers of intracytoplasmic membranes in Azotobacter. However no direct evidence has been provided for the internal cellular localization of any nitrogenase. Recent advances concerned with the crystallizatiorTand the electron microscopic characterization of the Mo-Fe protein component of Azotobacter nitrogenase, prompted the use of this purified protein to obtain antibodies (Ab) to be conjugated to electron dense markers for the intracellular localization of the protein by electron microscopy. The present study describes the use of ferritin conjugated to goat antitMo-Fe protein immunoglobulin (IgG) and the observations following its topical application to thin sections of N2-grown Azotobacter.

HASTANELERİN HİZMET KALİTESİNİN HASTA TATMİN ÖLÇEĞİ İLE ÖLÇÜLMESİ: KARABÜK DEVLET HASTANESİNDE YATAN HASTALAR ÜZERİNDE BİR ARAŞTIRMA THE MEASUREMENT SERVICE QUALITY OF THE HOSPITALS BY THE PATIENT SCALE: A RESEARCH ON THE PATIENTS IN KARABUK STATE HOSP

2013 ◽  
Vol 1 (1) ◽  
pp. 100
Author(s):  
Selçuk Yurtsever
Keyword(s):  
Patient Satisfaction ◽  
Health Services ◽  
Literature Review ◽  
Private Sector ◽  
State Hospital ◽  
Continuous Change ◽  
Satisfaction Scale ◽  
The World ◽  
Main Factors

It has been known that both in the world and in Turkey a continuous change has been experienced in the provision of health services in recent years. In this sense by adopting the customer(client) focused approach of either public or private sector hospitals; it has been seen that they are in the struggle for presenting a right, fast, trustuble, comfy service. The purpose of this research is to measure the satisfaction degree, expectations and perceptions of the patients in Karabük State Hospital through comparison. In this context, the patient satisfaction scale which has been developed as a result of literature review has been used and by this scale it has been tried to measure the satisfaction levels of the patients in terms of material and human factors which are the two main factors of the service that was presented. In the study, with the scales of Servqual and 0-100 Points together, in the part of the analysis MANOVA have been used. The expectations and the perceptions of the patient has been compared first by generally and then by separating to different groups according to the various criterias and in thisway it has been tried to be measured their satisfaction levels. According to the results that were obtained, although, the satisfaction levels of the patients who have taken service from Karabük State Hospital are high in terms of thedoctors and the nurses; it has been reached to the result that their satisfaction levels are low in terms of the materials that have been used at the presenting of the service and the management.

Physicochemical and bacteriological characterization of hospital effluents and their impact on the environment

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Human Health ◽  
Fecal Coliforms ◽  
Chemical Pollution ◽  
Hospital Effluents ◽  
Biological Contaminants ◽  
Almost All ◽  
Direct Discharge ◽  
Significant Chemical

Liquid effluents discharged by hospitals may contain chemical and biological contaminants whose main source is the different substances used for the treatment of patients. This type of rejection can present a sanitary potentially dangerous risk for human health and can provoke a strong degradation of diverse environmental compartments mainly water and soils. The present study focuses on the quality of the liquid effluents of Hassani Abdelkader’s hospital of Sidi Bel-Abbes (West of Algeria). The results reveal a significant chemical pollution (COD: 879 mgO2/L, BOD5: 850 mgO2/L, NH4+ : 47.9 mg/l, NO2- : 4.2 mg/l, NO3- : 56.8 mg/l with respect to WHO standard of 90 mgO2/L, 30 mgO2/L, 0.5 mg/l, 1 mg/l and 1 mg/l respectively). However, these effluents are biodegradable since the ratio COD/BOD5 do not exceeded the value of 2 in almost all samples. The presence of pathogen germs is put into evidence such as pseudomonas, the clostridium, the staphylococcus, the fecal coliforms and fecal streptococcus. These results show that the direct discharge of these effluents constitutes a major threat to human health and the environment.

scholarly journals Proteomic Advances in Milk and Dairy Products

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 3832
Author(s):  
Rubén Agregán ◽  
Noemí Echegaray ◽  
María López-Pedrouso ◽  
Radwan Kharabsheh ◽  
Daniel Franco ◽  
...  
Keyword(s):  
Dairy Products ◽  
Two Dimensional Gel Electrophoresis ◽  
Vast Number ◽  
Post Translational Modifications ◽  
Fundamental Parameters ◽  
Complex Fluid ◽  
Proteins And Peptides ◽  
Milk And Dairy Products

Proteomics is a new area of study that in recent decades has provided great advances in the field of medicine. However, its enormous potential for the study of proteomes makes it also applicable to other areas of science. Milk is a highly heterogeneous and complex fluid, where there are numerous genetic variants and isoforms with post-translational modifications (PTMs). Due to the vast number of proteins and peptides existing in its matrix, proteomics is presented as a powerful tool for the characterization of milk samples and their products. The technology developed to date for the separation and characterization of the milk proteome, such as two-dimensional gel electrophoresis (2DE) technology and especially mass spectrometry (MS) have allowed an exhaustive characterization of the proteins and peptides present in milk and dairy products with enormous applications in the industry for the control of fundamental parameters, such as microbiological safety, the guarantee of authenticity, or the control of the transformations carried out, aimed to increase the quality of the final product.

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