Investigation into the relationship among Cd bioaccumulation, nutrient composition, ultrastructural changes and antioxidative metabolism in lettuce genotypes under Cd stress

2019 ◽  
Vol 170 ◽  
pp. 578-589 ◽  
Author(s):  
José Lavres ◽  
Flávio Henrique Silveira Rabêlo ◽  
Flávia Regina Capaldi ◽  
André Rodrigues dos Reis ◽  
Monica Lanzoni Rosssi ◽  
...  
Keyword(s):  
Nutrient Composition ◽  
Ultrastructural Changes ◽  
Cd Stress ◽  
Antioxidative Metabolism ◽  
The Relationship

scholarly journals Ultrastructural changes of endothelium associated with thrombocytopenia

Blood ◽  
1975 ◽  
Vol 46 (4) ◽  
pp. 567-578 ◽  
Author(s):  
CS Kitchens ◽  
L Weiss
Keyword(s):  
Electron Microscopy ◽  
Endothelial Cells ◽  
Guinea Pig ◽  
Adult Male ◽  
Ultrastructural Changes ◽  
Endothelial Surface ◽  
Endothelial Junctions ◽  
The Relationship

Abstract In a study of the relationship between thrombocytopenia and increased vascular fragility, changes in the endothelium of capillaries and postcapillary venules of the tongue were examined by electron microscopy. Adult male albino rabbits (4 kg) were maintained thrombocytopenic (platelets less than 20,000/cu mm) up to 24 hr by one to three injections of guinea pig antirabbit platelet serum. Within 6 hr the normal projections and folds of the lumenal surface of the endothelial surface were largely effaced. In addition, the endothelium became thinner. In places, pores and membranous diaphragms were observed. Endothelial junctions appeared normal. Identical findings were observed if rabbits were made thrombocytopenic by administration of intraperitoneal busulfan. Intravenously administered Thorotrast was observed in endothelial cells and in the extravascular spaces within 3 min after injection into thrombocytopenic animals, while it was seen only intravascularly in control rabbits. With the spontaneous restoration of circulating platelets, the endothelium reverted to normal.

On the Ideology of Nutritionism

2008 ◽  
Vol 8 (1) ◽  
pp. 39-48 ◽  
Author(s):  
gyorgy scrinis
Keyword(s):  
Food Products ◽  
Nutrient Composition ◽  
The Body ◽  
Food Marketing ◽  
Dietary Advice ◽  
Nutrition Science ◽  
Primary Means ◽  
Biochemical Level ◽  
The Relationship ◽  
Dominant Paradigm

This essay introduces and defines the ideology or paradigm of nutritionism, which is generally characterized by a reductive focus on the nutrient composition of food. More specifically, it is where the nutri-biochemical level of engagement with food and the body becomes the dominant way of understanding the relationship between food and bodily health, and at the expense of other levels and ways of understanding and engaging with food. Nutritionism is the dominant paradigm within nutrition science, informs much dietary advice, and has become a primary means for the engineering and marketing of food products. A number of characteristics of nutritionism are defined, including nutritional reductionism, biomarker reductionism, genetic nutritionism, the functional body, the myth of nutritional precision, the nutritional gaze, and nutritional tinkering, nutri-quantification, the erasure of qualitatative food distinctions, nutrient fetishism, the 'good and bad nutrient' discourses, nutri-commodification, and the nutricentric person. A number of types of foods and types of food marketing are also introduced and defined, including nutritionally engineered foods, transnutric foods, nutritionally marketed foods and functionally marketed foods.

scholarly journals CHANGES IN PLASTID ULTRASTRUCTURE AND PROTEINS DURING THE DEVELOPMENT OF SQUASH FRUITS

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 591d-591
Author(s):  
Haktae Lim
Keyword(s):  
Developmental Stages ◽  
Ultrastructural Changes ◽  
Plastid Differentiation ◽  
Stages Of Growth ◽  
Plastid Ultrastructure ◽  
Fruit Maturity ◽  
Sds Page ◽  
Associated Proteins ◽  
The Relationship ◽  
Total Tissue

We first investigated the ultrastructural changes of plastids of two fruit pigment genotypes of squash with isogenic backgrounds (YY and BB). In YY ovaries at anthesis chloroplasts contained granular osmiophilic bodies and a few thylakoids, having two features of chromoplasts and chloroplasts in the same organs. After anthesis grana structure gradually disappeared and the typical membranous chromoplasts formed at fruit maturity. On the other hand, proplastids observed in BB ovaries transformed directly into chromoplasts as fruits matured. The same fruits at different developmental stages were also used for protein analysis to provide the relationship between changes in ultrastructure and in protein profiles during plastid differentiation. SDS-PAGE showed that qualitatively similar total plasstid polypeptides for two lines at all stages of growth even though there were quantitative decreases or increases in the contents of a few polypeptides. Soluble and membrane associated proteins were extracted from total tissue of subepidermis of squash and showed remarkable differences regarding the relative amounts of many protein species from ovaries and mature fruits. Reduced amounts of the large and small subunits of RuBPCO were obvious especially in immature fruits compared with LS and SS of RuBPCO of squash leaves.

Effect of cycloheximide on the freezing tolerance and ultrastructure of cortical parenchyma cells from mulberry twigs

1983 ◽  
Vol 61 (8) ◽  
pp. 2205-2211 ◽  
Author(s):  
T. Niki ◽  
A. Sakai
Keyword(s):  
Freezing Tolerance ◽  
Ultrastructural Changes ◽  
Cortical Cells ◽  
Cytological Change ◽  
Cortical Parenchyma ◽  
Parenchyma Cells ◽  
Cytological Changes ◽  
The Relationship ◽  
Further Development ◽  
In Cells

Experiments were performed using cycloheximide (CHI) on cortical parenchyma cells from mulberry twigs (Morus bombyciz cv. Gorogi) to understand the relationship between the sequence of cytological changes suggesting replacement of the plasmamembrane and the rapid increase in freezing tolerance. Cortical cells from twigs collected on October 16 and 27, which were hardy to −10 and −15 °C, respectively, were still alive after cooling to −70 °C if they had been exposed to −3 °C for 10 to 12 days. In these hardened cells, appearance of microvesicles (MVs) in the peripheral cytoplasm and fusion of these MVs with plasmamembrane were characteristically observed. Neither cytological change nor increase of freezing tolerance was observed in cells treated by CHI before their exposure to −3 °C for 10 to 12 days. However, the suppression of such changes by CHI treatment was effective only in cells which were hardy at −10 to −15 °C and not in the cells of twigs collected on November 4, which were hardy to −20 °C. Consequently, synthesis of some functional proteins during hardening was required for the further development of freezing tolerance, and synthesis had been accomplished before the cells became hardy to −20 °C. Ultrastructural changes brought about by CHI treatment suggest that synthesis of some functional proteins related to the presumed changes of plasmamembrane occurs during hardening.

scholarly journals Ultrastructural changes of endothelium associated with thrombocytopenia

Blood ◽  
1975 ◽  
Vol 46 (4) ◽  
pp. 567-578 ◽  
Author(s):  
CS Kitchens ◽  
L Weiss
Keyword(s):  
Electron Microscopy ◽  
Endothelial Cells ◽  
Guinea Pig ◽  
Adult Male ◽  
Ultrastructural Changes ◽  
Endothelial Surface ◽  
Endothelial Junctions ◽  
The Relationship

In a study of the relationship between thrombocytopenia and increased vascular fragility, changes in the endothelium of capillaries and postcapillary venules of the tongue were examined by electron microscopy. Adult male albino rabbits (4 kg) were maintained thrombocytopenic (platelets less than 20,000/cu mm) up to 24 hr by one to three injections of guinea pig antirabbit platelet serum. Within 6 hr the normal projections and folds of the lumenal surface of the endothelial surface were largely effaced. In addition, the endothelium became thinner. In places, pores and membranous diaphragms were observed. Endothelial junctions appeared normal. Identical findings were observed if rabbits were made thrombocytopenic by administration of intraperitoneal busulfan. Intravenously administered Thorotrast was observed in endothelial cells and in the extravascular spaces within 3 min after injection into thrombocytopenic animals, while it was seen only intravascularly in control rabbits. With the spontaneous restoration of circulating platelets, the endothelium reverted to normal.

Electron Microscopic study of the parathyroid gland of the melatonin-treated hamster

1990 ◽  
Vol 48 (3) ◽  
pp. 328-329
Author(s):  
Shizuko Shoumura ◽  
Shoichi Emura ◽  
Tomo Yamahira ◽  
Tomoo Kawada ◽  
Hiroshi Oda ◽  
...  
Keyword(s):  
Body Weight ◽  
Pineal Gland ◽  
Parathyroid Gland ◽  
Morphological Changes ◽  
Ultrastructural Changes ◽  
Electron Microscopic ◽  
Golden Hamsters ◽  
Microscopic Studies ◽  
The Relationship ◽  
Average Body

Some studies have dealt with the relationship between the pineal gland and the parathyroid gland (PTG) Morphological changes suggest that the pineal gland may inhibit or stimulate the PTG. There are a few light microscopic studies on the effects of pineal extract on the PTG. However, there is no study on the effects of melatonin on the ultrastructure of the PTG. We investigated ultrastructural changes in the PTG of golden hamsters after administration of melatonin.Materials and methods. Three-month-old female golden hamsters with an average body weight of 130 g were divided into 5 groups of 5 animals each. One group was given 0.2.ml of distilled water as controls. The remaining groups were given 0.2 ml of melatonin solution at a dose of 0.8 mg/100 g body weight. The PTG of each group was removed under pentobarbital anesthesia at 1, 5, 24 and 48 hours after injection. The PTG was immersed in a mixture of 2.5% glutaraldehyde and 2% OsO4, dehydrated through acetone and embedded in Epon 812.

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