scholarly journals Cytotoxic, Genotoxic, and Polymorphism Effects on Vanilla planifolia Jacks ex Andrews after Long-Term Exposure to Argovit® Silver Nanoparticles

Nanomaterials ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 754 ◽  
Author(s):  
Jericó Bello-Bello ◽  
José Spinoso-Castillo ◽  
Samantha Arano-Avalos ◽  
Eduardo Martínez-Estrada ◽  
María Arellano-García ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Large Scale ◽  
Inter Simple Sequence Repeat ◽  
Metallic Silver ◽  
Vanilla Planifolia ◽  
Genotoxic Effects ◽  
Total Percentage ◽  
Long Time ◽  
Mexican Government

Worldwide demands of Vanilla planifolia lead to finding new options to produce large-scale and contaminant-free crops. Particularly, the Mexican Government has classified Vanilla planifolia at risk and it subject to protection programs since wild species are in danger of extinction and no more than 30 clones have been found. Nanotechnology could help to solve both demands and genetic variability, but toxicological concerns must be solved. In this work, we present the first study of the cytotoxic and genotoxic effects promoted by AgNPs in Vanilla planifolia plantlets after a very long exposure time of six weeks. Our results show that Vanilla planifolia plantlets growth with doses of 25 and 50 mg/L is favored with a small decrease in the mitotic index. A dose-dependency in the frequency of cells with chromosomal aberrations and micronuclei was found. However, genotoxic effects could be considered as minimum due to with the highest concentration employed (200 mg/L), the total percentage of chromatic aberrations is lower than 5% with only three micronuclei in 3000 cells, despite the long-time exposure to AgNP. Therefore, 25 and 50 mg/L (1.5 and 3 mg/L of metallic silver) were identified as safe concentrations for Vanilla planifolia growth on in vitro conditions. Exposure of plantlets to AgNPs increase the polymorphism registered by inter-simple sequence repeat method (ISSR), which could be useful to promote the genetic variability of this species.

scholarly journals Use of Selected Antioxidant-Rich Spices and Herbs in Foods

2021 ◽  
Author(s):  
Perçin Karakol ◽  
Emin Kapi
Keyword(s):  
Large Scale ◽  
Ischemia Reperfusion Injury ◽  
Ischemia Reperfusion ◽  
Antioxidant Properties ◽  
Epidemiological Studies ◽  
Herbal Products ◽  
Pharmacological Agents ◽  
Long Time ◽  
Herbs And Spices

Free radicals are chemicals that play a role in the etiopathogenesis of ischemia–reperfusion injury. To prevent or reduce this damage, many protective or therapeutic antioxidants are used effectively in alternative medicine. These antioxidants include immunological or pharmacological agents, vitamins, food and herbal products, and spices. Herbs and spices have been used for a long time as coloring or preservative agents by adding to the content of foods, and at the same time to increase the nutritional value of foods. More recently, the nutritional effects of herbs and spices have become more perceived and the area of ​​interest for these products has increased. Concordantly, the biological contents of herbs and spices have begun to be studied in more detailed way at the cellular and molecular level. Sample plants are classified according to different chemical families, with the diet. Therefore, they have different levels of antioxidant capacity. These products also have potent anti-inflammatory, antihypertensive, glucoregulatory, antithrombotic, anticarcinogenic and so forth effects. These properties are used in the treatment of some chronic diseases. In this review, the antioxidant properties of various herbs and spices used to add flavor to foods or to extend their shelf life have been examined in the light of large-scale nutritional epidemiological studies, in vitro cellular/animal studies and clinical trials.

scholarly journals THE PRESERVATION OF LIVING RED BLOOD CELLS IN VITRO

1916 ◽  
Vol 23 (2) ◽  
pp. 239-248 ◽  
Author(s):  
Peyton Rous ◽  
J. R. Turner
Keyword(s):  
Red Blood Cells ◽  
Blood Cells ◽  
Large Scale ◽  
Blood Count ◽  
Sodium Citrate ◽  
Human Cells ◽  
Red Cells ◽  
Long Time ◽  
And Function

In order to determine the availability for functional uses of red cells kept in vitro by our methods, transfusion experiments have been carried out with rabbits by which a large part of their blood was replaced with kept rabbit cells suspended in Locke's solution. It has been found that erythrocytes preserved in mixtures of blood, sodium citrate, saccharose, and water for 14 days, and used to replace normal blood, will remain in circulation and function so well that the animal shows no disturbance, and the blood count, hemoglobin, and percentage of reticulated red cells remain unvaried. Cells kept for longer periods, though intact and apparently unchanged when transfused, soon leave the circulation. Animals in which this disappearance of cells is taking place on a large scale, remain healthy save for the progressing anemia. The experiments prove that, in the exsanguinated rabbit at least, transfusions of cells kept for a long time in vitro may be used to replace the blood lost, and that when the cells have been kept too long but are still intact they are disposed of without harm. The indications are that kept human cells could be profitably employed in the same way.

scholarly journals In vitro testing of silver-containing spacer in periprosthetic infection management

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Renate Krassnig ◽  
Gloria Hohenberger ◽  
Angelika Schwarz ◽  
Walter Goessler ◽  
Gebhard Feierl ◽  
...  
Keyword(s):  
Bone Cement ◽  
Deep Infection ◽  
Metallic Silver ◽  
Infection Management ◽  
Silver Sulfate ◽  
Systemic Antibiotic Therapy ◽  
Nanosilver Particles ◽  
Long Time ◽  
Antimicrobial Effectiveness

AbstractDeep infection is a serious complication in endoprosthetic surgery. In correlation to the patient local or systemic compromising factors conservative and surgical proceedings has to be evaluated. Systemic antibiotic therapy is the gold standard in infection management. Implanted silver-coated or silver-containing medical devices have been proven to their antimicrobial effectiveness since the 1990s by several investigators. The outcomes showed that long time implantation could cause damaging of the surrounding tissues, especially of adjacent nerves. The aim of our study was to evaluate the release of silver (I) ions from bone cement mixed with either nanosilver particles (AgNPs), different concentrations of silver sulfate (Ag2SO4) or from pure metallic silver strips. Therefore, we choose two methods: the first, called “static model”, was chosen to evaluate the maximal accumulative concentration of silver (I) ions, with the second, called “dynamic model”, we simulated a continuous reduction of the ions. In an additional test design, the different materials were evaluated for their antimicrobial activity using an agar gel diffusion assay. The outcome showed that neither the addition of 1% (w/w) nanosilver nor 0.1% silver sulfate (w/w) to polymethylmethacrylat bone cement has the ability to release silver (I) ions in a bactericidal/antifungal concentration. However, the results also showed that the addition of 0.5% (w/w) and 1% (w/w) silver sulfate (Ag2SO4) to bone cement is an effective amount of silver for use as a temporary spacer.

scholarly journals Characterization of new variety of Chrysanthemum by using ISSR markers

2011 ◽  
Vol 29 (4) ◽  
pp. 613-617 ◽  
Author(s):  
SK Palai ◽  
Gyana Ranjan Rout
Keyword(s):  
Large Scale ◽  
Ornamental Plants ◽  
Inter Simple Sequence Repeat ◽  
Issr Markers ◽  
Flower Bud ◽  
New Variety ◽  
In Vitro Technique ◽  
Asteraceae Family

Chrysanthemum is the important cut flower after rose among the ornamental plants traded in the global flower market. It is propagated vegetatively and also has a strong sporophytic self-incompatibility system as shown by all members of Asteraceae family. Morphologically, the petal numbers and flower colours present maximum variation when compared to existing varieties. Twenty Inter Simple Sequence Repeat primers were used to detect the new variety of Chrysanthemum developed through spontaneous sporting. The results indicate that the rate of polymorphism showed significant differences as compared to other existing varieties. The average number of amplification products per primer was eight. The size of ISSR amplified fragments varied from 0.25 - 2.4 Kbp. Therefore, ISSR marker is a useful technique for the rapid and easy assessment of genetic variation among the variants. Morphological traits of new variants showed variation as compared to other parents. The 1st flower bud appearance and the height of 1st bud of the variant were less as compared to original mother variety. The new variants can be propagated in large scale commercially through in vitro technique.

Fabrication of CMOS Compatible Sub-micron Nails for On-chip Phagocytosis

2007 ◽  
Vol 1009 ◽  
Author(s):  
Roeland Huys ◽  
Carmen Bartic ◽  
Bart Van Meerbergen ◽  
Dries Braeken ◽  
Josine Loo ◽  
...  
Keyword(s):  
Large Scale ◽  
State Of The Art ◽  
Cmos Technology ◽  
Biological Phenomena ◽  
Long Time ◽  
Cmos Compatible ◽  
New Challenges ◽  
On Chip ◽  
Bio Compatibility

AbstractNeuronal research requires to efficiently perform long-time experiments on large-scale neuronal networks in a minimally invasive way. Such experiments imply stimulation and measurements of electrical activity on a large number of neurons. This could be achieved by on-chip integration of actuators, sensors and readout electronics with dimensions comparable to the sizes of neurons. Integration of biosensors at this scale creates new challenges: the processing of the sensors must be compatible with state-of-the art CMOS technology, the system must be biocompatible, and the down-scaled technology imposes restrictions on the applicable stimulation voltages and increases the electrical noise.Recently it has been demonstrated that biological phenomena can be exploited in order to achieve the best coupling between cells and sub-micron scale electronics. Engulfment of sub-micron nail structures by the cell membrane minimizes the distance between the sensor and the cell [1], [2].This paper presents two methods to produce nails with sizes from sub-micrometer to micrometer scales, on top of a CMOS chip. Prototype chips have been fabricated, and cells have been cultured to examine the in-vitro bio-compatibility of the chip.

scholarly journals Micropropagation of Gynostemma pentaphyllum by internode culture techniques

2018 ◽  
Vol 16 (3) ◽  
pp. 459-464
Author(s):  
Pham Cao Khai ◽  
Tran Van Minh
Keyword(s):  
Medicinal Plant ◽  
Large Scale ◽  
Shoot Proliferation ◽  
Root Induction ◽  
Ms Medium ◽  
Gynostemma Pentaphyllum ◽  
Culture Techniques ◽  
Diluted Solution ◽  
Long Time

Gynostemma pentaphyllum is a rarely valuable medicinal plant that people has been traditionally used for disease treatment in a long time. The modern medical studies have also shown that it exhibits a variety of pharmacological properties including anti-inflammatory, antioxidative, lipid metabolism regulatory, antiproliferative, neuroprotective and anxiolytic activities. However, conservation and exploiting this medicinal plant were not managed properly and studies of biotechnology on this medicinal plant were till limited. Therefore, the application of plant cell biotechnology in conservation and development of G. pentaphyllum is necessary. The internode segments of G. pentaphyllum were sterilized with diluted solution of javel (50%) for 20 minutes. The rate of sterile explants reached to 73.33%. In vitro shoots tips and cutting stem segments of G. pentaphyllum were used as explants and cultured on MS medium supplemented with BA (0.1; 0.5; 1.0; 1.5; 2.0 mg/L) combined with NAA (0; 0.1; 0.2; 0.3 mg/L) for shoot proliferation. After 6 weeks, new shoots were generated and the MS medium containing 1.0 mg/L BA and 0.1 mg/L NAA gave the highest shoot induction (6.8 shoots/explant). To determine the mineral media suitable for growth of G. pentaphyllum, regenerated shoots were cultured on different mineral media. The MS ½ medium was suitable for growth of shoots with 5.2 cm height and 4.0 leaves/plantlet. For root induction, the MS ½ medium supplemented with 0.25 mg/L IBA was optimal, the root length could be in 7.6 cm in this medium. This system could be utilized for large-scale multiplication of G. pentaphyllum.

Purification of the Antihemophilic Factor by Gel Filtration on Agarose

1969 ◽  
Vol 22 (03) ◽  
pp. 577-583 ◽  
Author(s):  
M.M.P Paulssen ◽  
A.C.M.G.B Wouterlood ◽  
H.L.M.A Scheffers
Keyword(s):  
Factor Viii ◽  
Plasma Proteins ◽  
Large Scale ◽  
Gel Filtration ◽  
Large Scale Preparation ◽  
Scale Preparation ◽  
Antihemophilic Factor

SummaryFactor VIII can be isolated from plasma proteins, including fibrinogen by chromatography on agarose. The best results were obtained with Sepharose 6B. Large scale preparation is also possible when cryoprecipitate is separated by chromatography. In most fractions containing factor VIII a turbidity is observed which may be due to the presence of chylomicrons.The purified factor VIII was active in vivo as well as in vitro.

TO THE QUESTION OF RESPONSIBILITY FOR TORTURE IN THE RUSSIAN FEDERATION

2020 ◽  
Vol 10 (2) ◽  
pp. 103-106
Author(s):  
ASTEMIR ZHURTOV ◽  
Keyword(s):  
Human Rights ◽  
Russian Federation ◽  
Large Scale ◽  
Human Life ◽  
International Standards ◽  
World Community ◽  
The World ◽  
Long Time ◽  
Protection Of Human Rights ◽  
The Russian Federation

Cruel and inhumane acts that harm human life and health, as well as humiliate the dignity, are prohibited in most countries of the world, and Russia is no exception in this issue. The article presents an analysis of the institution of responsibility for torture in the Russian Federation. The author comes to the conclusion that the current criminal law of Russia superficially and fragmentally regulates liability for torture, in connection with which the author formulated the proposals to define such act as an independent crime. In the frame of modern globalization, the world community pays special attention to the protection of human rights, in connection with which large-scale international standards have been created a long time ago. The Universal Declaration of Human Rights and other international acts enshrine prohibitions of cruel and inhumane acts that harm human life and health, as well as degrade the dignity.Considering the historical experience of the past, these standards focus on the prohibition of any kind of torture, regardless of the purpose of their implementation.

Naphthoquinones and derivatives for chemotherapy: perspectives and limitations of their anti-trypanosomatids activities

2020 ◽  
Vol 26 ◽  
Author(s):  
Luíza Dantas-Pereira ◽  
Edézio F. Cunha-Junior ◽  
Valter V. Andrade-Neto ◽  
John F. Bower ◽  
Guilherme A. M. Jardim ◽  
...  
Keyword(s):  
Large Scale ◽  
Neglected Tropical Diseases ◽  
Folk Medicine ◽  
Leishmania Species ◽  
Parasitic Infections ◽  
Mechanistic Analysis ◽  
Leishmania Spp ◽  
Nanomolar Range

: Chagas disease, Sleeping sickness and Leishmaniasis, caused by trypanosomatids Trypanosoma cruzi, Trypanosoma brucei and Leishmania spp., respectively, are considered neglected tropical diseases, and they especially affect impoverished populations in the developing world. The available chemotherapies are very limited and a search for alternatives is still necessary. In folk medicine, natural naphthoquinones have been employed for the treatment of a great variety of illnesses, including parasitic infections. This review is focused on the anti-trypanosomatid activity and mechanistic analysis of naphthoquinones and derivatives. Among all the series of derivatives tested in vitro, naphthoquinone-derived 1,2,3-triazoles were very active on T. cruzi infective forms in blood bank conditions, as well as in amastigotes of Leishmania spp. naphthoquinones containing a CF3 on a phenyl amine ring inhibited T. brucei proliferation in the nanomolar range, and naphthopterocarpanquinones stood out for their activity on a range of Leishmania species. Some of these compounds showed a promising selectivity index (SI) (30 to 1900), supporting further analysis in animal models. Indeed, high toxicity to the host and inactivation by blood components are crucial obstacles to be overcome to use naphthoquinones and/or their derivatives for chemotherapy. Multidisciplinary initiatives embracing medicinal chemistry, bioinformatics, biochemistry, and molecular and cellular biology need to be encouraged to allow the optimization of these compounds. Large scale automated tests are pivotal for the efficiency of the screening step, and subsequent evaluation of both the mechanism of action in vitro and pharmacokinetics in vivo are essential for the development of a novel, specific and safe derivative, minimizing adverse effects.

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