N-Alkyl amide synthesis via N-alkylation of amides with alcohols

2019 ◽  
Vol 17 (8) ◽  
pp. 2044-2054 ◽  
Author(s):  
Xingchao Dai ◽  
Feng Shi
Keyword(s):  
Present Review ◽  
Amide Synthesis ◽  
Alkyl Amide

The present review summarizes the recent development of N-alkylation of amides with alcohols according to the classification of catalysts.

scholarly journals Brain Concussion: New Classifications and Current Physiopathological Knowledge of the Disease

2017 ◽  
Vol 38 (04) ◽  
pp. 284-291
Author(s):  
Daniel Damiani ◽  
Durval Damiani
Keyword(s):  
Review Paper ◽  
Present Review ◽  
Emergency Rooms ◽  
Late Sequelae ◽  
Brain Concussion ◽  
Cerebral Concussion ◽  
High Prevalence ◽  
The World ◽  
New Evidence

AbstractThe present review paper aims to update the definition and classification of cerebral concussion, highlighting its pathophysiological mechanisms. The high prevalence of cerebral concussion in emergency rooms around the world makes it necessary to know its proper management to avoid its late sequelae, which traditionally compromise cognitive aspects of behavior. New evidence on potential neuroprotective treatments is being investigated.

Conformational symmetry and vibrational dynamics of polymers

2009 ◽  
Vol 81 (3) ◽  
pp. 549-569 ◽  
Author(s):  
Poonam Tandon ◽  
Naresh Kumar ◽  
Vineet Gupta ◽  
Deepika Chaturvedi ◽  
Soni Mishra ◽  
...  
Keyword(s):  
Normal Modes ◽  
Present Review ◽  
Important Class ◽  
Vibrational Dynamics ◽  
Helical Polymers ◽  
Polymeric Systems ◽  
Symmetry Species ◽  
Hydrodynamical Behavior

Polymers are an important class of materials, and their conformation dictates their dynamical, thermodynamical, and hydrodynamical behavior. Several spectroscopic and other techniques have been employed to characterize their conformation. However, little use has been made of group-theoretical techniques except in the classification of symmetry species. In the present review, an attempt has been made to correlate normal modes and their dispersion profiles with the conformation of the polymeric systems. This has been attempted in the case of 2-, 3-, 4-fold and α-helical polymers.

scholarly journals “Annam Vruttikaranam Shreshtham: Importance of diet in Brihattrayi.”

2021 ◽  
Vol 9 (01) ◽  
Author(s):  
Kavita Bhagat
Keyword(s):  
Present Review ◽  
Successful Management ◽  
Future Studies ◽  
Root Cause ◽  
Inclusive Approach ◽  
Almost All ◽  
Available Information ◽  
Supporting Materials ◽  
All Diseases

The diet is one of the most important entity for Vrutti (Sustenance of life). The major treatises of Ayurveda (Brihattrayi), namely Charak Samhita, Sushruta Samhita and Ashtanga Hridaya (sometimes, Ashtanga Sangraha also) give logical and didactic explanation for it. The present review was aimed at compiling available information about importance of Ahara (diet) from these four treatises. The review can be helpful for understanding various concepts related to food in Ayurveda and can be implied in future studies. The Charaka Samhita with Ayurveda Dipika commentary by Chakrapani, The Sushruta Samhita with Nibandha Sangraha commentary by Dalhana, The Ashtanga Hridaya with Sarvanga Sundara commentary by Arunadattta and Ashtanga Sangraha with Shashilekha commentary by Indu, were mainly reviewed for the present study. Supporting materials from ancient and contemporary sources were also reviewed.  The classification of Ahara (diet) as well as Ahara Vidhi Vidhana (dietetic rules) have been reviewed from all four major treatises of Ayurveda. The aim of Ahara (diet) has been described in an all-inclusive approach converging to most important i.e. Vrutti (sustenance of life). This ultimate approach can be utilized in development of various diet plans for healthy as well as diseased people. As Ahara (diet) is the root cause and treatment of almost all diseases, this knowledge can prove to be useful for successful management of various conditions.

scholarly journals Histamine and diabetic nephropathy: an up-to-date overview

2019 ◽  
Vol 133 (1) ◽  
pp. 41-54 ◽  
Author(s):  
Alessandro Pini ◽  
Roberta Verta ◽  
Cristina Grange ◽  
Maura Gurrieri ◽  
Arianna Carolina Rosa
Keyword(s):  
Diabetic Nephropathy ◽  
Kidney Function ◽  
Vascular Complication ◽  
Present Review ◽  
Glomerular Hyperfiltration ◽  
Interesting Topic ◽  
Pleiotropic Action

Abstract The classification of diabetic nephropathy (DN) as a vascular complication of diabetes makes the possible involvement of histamine, an endogenous amine that is well known for its vasoactive properties, an interesting topic for study. The aim of the present review is to provide an extensive overview of the possible involvement of histamine in the onset and progression of DN. The evidence collected on the role of histamine in kidney function together with its well-known pleiotropic action suggest that this amine may act simultaneously on glomerular hyperfiltration, tubular inflammation, fibrosis development and tubular hypertrophy.

Note on the spectral classification of carbon stars in the photographic infrared region

1966 ◽  
Vol 24 ◽  
pp. 21-23
Author(s):  
Y. Fujita
Keyword(s):  
Infrared Region ◽  
Spectral Classification ◽  
Carbon Stars

We have investigated the spectrograms (dispersion: 8Å/mm) in the photographic infrared region fromλ7500 toλ9000 of some carbon stars obtained by the coudé spectrograph of the 74-inch reflector attached to the Okayama Astrophysical Observatory. The names of the stars investigated are listed in Table 1.

Diagnostic Value of Electron Microscopy in Soft Tissue Tumors

1970 ◽  
Vol 28 ◽  
pp. 220-221
Author(s):  
Gerald Fine ◽  
Azorides R. Morales
Keyword(s):  
Cardiac Myxoma ◽  
Osteogenic Sarcoma ◽  
Diagnostic Value ◽  
Soft Tissue Tumors ◽  
Amelanotic Melanoma ◽  
Growth Patterns ◽  
Light Microscopic Level ◽  
Mesenchymal Tumors ◽  
Good Agreement

For years the separation of carcinoma and sarcoma and the subclassification of sarcomas has been based on the appearance of the tumor cells and their microscopic growth pattern and information derived from certain histochemical and special stains. Although this method of study has produced good agreement among pathologists in the separation of carcinoma from sarcoma, it has given less uniform results in the subclassification of sarcomas. There remain examples of neoplasms of different histogenesis, the classification of which is questionable because of similar cytologic and growth patterns at the light microscopic level; i.e. amelanotic melanoma versus carcinoma and occasionally sarcoma, sarcomas with an epithelial pattern of growth simulating carcinoma, histologically similar mesenchymal tumors of different histogenesis (histiocytoma versus rhabdomyosarcoma, lytic osteogenic sarcoma versus rhabdomyosarcoma), and myxomatous mesenchymal tumors of diverse histogenesis (myxoid rhabdo and liposarcomas, cardiac myxoma, myxoid neurofibroma, etc.)

Ultrastructure of mesotheliomas

1984 ◽  
Vol 42 ◽  
pp. 98-101
Author(s):  
Irving Dardick
Keyword(s):  
Electron Microscopy ◽  
Latent Period ◽  
Spindle Cell ◽  
Spindle Cell Sarcoma ◽  
Metastatic Adenocarcinoma ◽  
Cell Sarcoma ◽  
Cytological Features ◽  
Industrial Use ◽  
Degree Of Differentiation

With the extensive industrial use of asbestos in this century and the long latent period (20-50 years) between exposure and tumor presentation, the incidence of malignant mesothelioma is now increasing. Thus, surgical pathologists are more frequently faced with the dilemma of differentiating mesothelioma from metastatic adenocarcinoma and spindle-cell sarcoma involving serosal surfaces. Electron microscopy is amodality useful in clarifying this problem.In utilizing ultrastructural features in the diagnosis of mesothelioma, it is essential to appreciate that the classification of this tumor reflects a variety of morphologic forms of differing biologic behavior (Table 1). Furthermore, with the variable histology and degree of differentiation in mesotheliomas it might be expected that the ultrastructure of such tumors also reflects a range of cytological features. Such is the case.

Interpreting HVEM of muscle-cell impulse networks

1992 ◽  
Vol 50 (1) ◽  
pp. 126-127
Author(s):  
Paul DeCosta ◽  
Kyugon Cho ◽  
Stephen Shemlon ◽  
Heesung Jun ◽  
Stanley M. Dunn
Keyword(s):  
Structural Analysis ◽  
Muscle Cell ◽  
Electron Micrographs ◽  
Relative Size ◽  
Automatic Classification ◽  
Nerve Fibers ◽  
Analysis Algorithm ◽  
Structural Networks

Introduction: The analysis and interpretation of electron micrographs of cells and tissues, often requires the accurate extraction of structural networks, which either provide immediate 2D or 3D information, or from which the desired information can be inferred. The images of these structures contain lines and/or curves whose orientation, lengths, and intersections characterize the overall network.Some examples exist of studies that have been done in the analysis of networks of natural structures. In, Sebok and Roemer determine the complexity of nerve structures in an EM formed slide. Here the number of nodes that exist in the image describes how dense nerve fibers are in a particular region of the skin. Hildith proposes a network structural analysis algorithm for the automatic classification of chromosome spreads (type, relative size and orientation).

Dual stain kit for the microscopic gram classification of ocular infection bacteria

1993 ◽  
Vol 51 ◽  
pp. 248-249
Author(s):  
Jacob S. Hanker ◽  
Dale N. Holdren ◽  
Kenneth L. Cohen ◽  
Beverly L. Giammara
Keyword(s):  
Contact Lenses ◽  
Ocular Infection ◽  
Gram Negative Bacteria ◽  
Gram Negative ◽  
Gram Staining ◽  
Ocular Infections ◽  
Different Types ◽  
Culture Positive ◽  
Increased Susceptibility

Keratitis and conjunctivitis (infections of the cornea or conjunctiva) are ocular infections caused by various bacteria, fungi, viruses or parasites; bacteria, however, are usually prominent. Systemic conditions such as alcoholism, diabetes, debilitating disease, AIDS and immunosuppressive therapy can lead to increased susceptibility but trauma and contact lens use are very important factors. Gram-negative bacteria are most frequently cultured in these situations and Pseudomonas aeruginosa is most usually isolated from culture-positive ulcers of patients using contact lenses. Smears for staining can be obtained with a special swab or spatula and Gram staining frequently guides choice of a therapeutic rinse prior to the report of the culture results upon which specific antibiotic therapy is based. In some cases staining of the direct smear may be diagnostic in situations where the culture will not grow. In these cases different types of stains occasionally assist in guiding therapy.

Ultrastructural Classification of Pituary Adenomas

1990 ◽  
Vol 48 (3) ◽  
pp. 258-258
Author(s):  
S. Arumugam ◽  
Sarasa Bharati Arumugam
Keyword(s):  
Cytoplasmic Organelle ◽  
Null Cell ◽  
Cell Adenoma ◽  
Mixed Cell ◽  
Light Microscope Level ◽  
Null Cell Adenoma ◽  
Growth Hormone Cell ◽  
Ultrastructural Characteristics ◽  
Organelle Morphology

Adenoaas of the pituitary are no longer classified based on their tinctorial affinity to dyes. With the advent of the newer methods of sophisticated technology, it is now possible to classify. These depending upon the type of hormone secreted based either on histochemical techniques or on ultrastructural characteristics. The latter provides an insight into the cytoplasmic organelle morphology which offers a delightful feast to the eye as well.This paper presents the ultrastructural characters of the pituitary adenoma as seen in Madras. 171 adenomas (124 males and 47 females) were seen during 1972-1989, classified at the light microscope level as 159 chromophobe, 2 basophilic, 4 eosinophilic and 6 mixed adenomas.Ultrastructural examination showed that the sparsely granular prolactin cell adenoma is the commonest adenoma to be encountered closely followed by the growth hormone cell adenoma, null cell adenoma, the mixed cell adenoma and others.

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