scholarly journals Chemical Proprieties of Biopolymers (Chitin/Chitosan) and Their Synergic Effects with Endophytic Bacillus Species: Unlimited Applications in Agriculture

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 1117
Author(s):  
Rkhaila Amine ◽  
Chtouki Tarek ◽  
Erguig Hassane ◽  
El Haloui Noureddine ◽  
Ounine Khadija
Keyword(s):  
Chemical Properties ◽  
Bacillus Species ◽  
Agricultural Field ◽  
Bacterial Strains ◽  
Genus Bacillus ◽  
The Past ◽  
Physico Chemical ◽  
Potential Applications ◽  
Synthetic Pesticides ◽  
Chitin And Chitosan

Over the past decade, reckless usage of synthetic pesticides and fertilizers in agriculture has made the environment and human health progressively vulnerable. This setting leads to the pursuit of other environmentally friendly interventions. Amongst the suggested solutions, the use of chitin and chitosan came about, whether alone or in combination with endophytic bacterial strains. In the framework of this research, we reported an assortment of studies on the physico-chemical properties and potential applications in the agricultural field of two biopolymers extracted from shrimp shells (chitin and chitosan), in addition to their uses as biofertilizers and biostimulators in combination with bacterial strains of the genus Bacillus sp. (having biochemical and enzymatic properties).

scholarly journals Structures, physico-chemical properties, production and (potential) applications of sucrose-derived α-d-glucans synthesized by glucansucrases

2020 ◽  
Vol 249 ◽  
pp. 116818
Author(s):  
Xiaodan Li ◽  
Xiaofei Wang ◽  
Xiangfeng Meng ◽  
Lubbert Dijkhuizen ◽  
Weifeng Liu
Keyword(s):  
Chemical Properties ◽  
Physico Chemical ◽  
Potential Applications

scholarly journals On the cataphoresis of gliadin Part—The adsorption of gliadin on quartz

1934 ◽  
Vol 147 (860) ◽  
pp. 1-10 ◽  
Keyword(s):  
Electric Field ◽  
Chemical Properties ◽  
Plant Proteins ◽  
The Past ◽  
Physico Chemical ◽  
Inert Particles

There have been few systematic investigations of the physico-chemical properties of the more important plant proteins; such investigations as have been carried out in the past have concerned themselves almost entirely with the better known animal proteins. It was, therefore, thought desirable to make a study of the physico-chemical properties of the protein gliadin, which, together with glutenin, forms the chief constituent of the gluten of flour. Of all the methods employed for determining the mobility of colloid ions in an electric field, the micro-cataphoretic method is the most exact. In studying the micro-cataphoresis of protein sols in which the particles are not visible in the ultramicroscope, it has been usual to make measurements using inert particles coated with protein. Although it was found possible to obtain gliadin sols containing visible submicrons, it was decided to make observations also on quartz particles covered with gliadin.

Potential Applications of Biphosphonates in Dental Surgical Implants

2007 ◽  
Vol 20 (3) ◽  
pp. 455-465 ◽  
Author(s):  
D. Berardi ◽  
T. Carlesi ◽  
F. Rossi ◽  
M. Calderini ◽  
R. Volpi ◽  
...  
Keyword(s):  
Alveolar Bone ◽  
Chemical Properties ◽  
Osteonecrosis Of The Jaw ◽  
In Vivo Experiments ◽  
Surgical Implants ◽  
Physico Chemical ◽  
Potential Applications ◽  
Collateral Effect

Biphosphonates are largely used for their unquestionable properties of inhibiting bone resorption by osteoclast in the treatment of various osteometabolic illnesses such as osteoporosis, multiple myeloma, tumors which metastasize to the bone and malignant hypercalcemia. In this literature review the physico-chemical properties, biologic activities and the mechanisms of action of biphosphonates are described. The use of these drugs is discussed, analyzing the quantity of results which have emerged through in vitro and in vivo experiments on animal models. In this study the efficiency of these drugs is demonstrated in contrasting the osteolitic processes of the alveolar bone, in promoting the neoformation and in bettering the quality of bone implants. However, it is important to draw attention to a worrying correlation which has emerged during the last 3–4 years, between osteonecrosis of the jaw (ONJ) and the systemic administration of aminobiphosphonates. This collateral effect did not emerge following the use of non-aminobiphosphonates. The aim of this revie w is to identify the guidelines for the use of biphosphonates in oral implant surgery.

scholarly journals Titanium Dioxide (TiO2) Mesocrystals: Synthesis, Growth Mechanisms and Photocatalytic Properties

Catalysts ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 91 ◽  
Author(s):  
Boxue Zhang ◽  
Shengxin Cao ◽  
Meiqi Du ◽  
Xiaozhou Ye ◽  
Yun Wang ◽  
...  
Keyword(s):  
Chemical Properties ◽  
Building Blocks ◽  
High Specific Surface Area ◽  
Future Research ◽  
Special Focus ◽  
Growth Mechanisms ◽  
Environmental Deterioration ◽  
Physico Chemical ◽  
Potential Applications ◽  
Shed Light

Hierarchical TiO2 superstructures with desired architectures and intriguing physico-chemical properties are considered to be one of the most promising candidates for solving the serious issues related to global energy exhaustion as well as environmental deterioration via the well-known photocatalytic process. In particular, TiO2 mesocrystals, which are built from TiO2 nanocrystal building blocks in the same crystallographical orientation, have attracted intensive research interest in the area of photocatalysis owing to their distinctive structural properties such as high crystallinity, high specific surface area, and single-crystal-like nature. The deeper understanding of TiO2 mesocrystals-based photocatalysis is beneficial for developing new types of photocatalytic materials with multiple functionalities. In this paper, a comprehensive review of the recent advances toward fabricating and modifying TiO2 mesocrystals is provided, with special focus on the underlying mesocrystallization mechanism and controlling rules. The potential applications of as-synthesized TiO2 mesocrystals in photocatalysis are then discussed to shed light on the structure–performance relationships, thus guiding the development of highly efficient TiO2 mesocrystal-based photocatalysts for certain applications. Finally, the prospects of future research on TiO2 mesocrystals in photocatalysis are briefly highlighted.

scholarly journals Mineralogical and physico–chemical properties of bentonites from the Jastrabá Formation (Kremnické vrchy Mts., Western Carpathians)

2019 ◽  
Vol 70 (5) ◽  
pp. 433-445 ◽  
Author(s):  
Marek Osacký ◽  
Tomáš Binčík ◽  
Tomáš Paľo ◽  
Peter Uhlík ◽  
Jana Madejová ◽  
...  
Keyword(s):  
Interlayer Space ◽  
Analytical Data ◽  
Chemical Properties ◽  
Exchange Capacity ◽  
Mineral Admixtures ◽  
The Past ◽  
Physico Chemical ◽  
The Mean ◽  
Increasing Demand ◽  
Total Specific Surface Area

Abstract In the past years an increasing demand for bentonites resulted in the opening of new bentonite deposits in the Jastrabá Formation. The shortage of information, in particular analytical data, on the bentonites from the newly opened Jastrabá Fm. deposits was the motivation for the current study. Smectite is the predominant mineral in all bulk bentonites from the new deposits. Its amount varied between 43 and 90 wt. %. The bulk bentonites also contain variable amounts (10–57 wt. %) of mineral admixtures such as feldspars, mica, opal-CT, kaolinite, quartz and sometimes goethite. The smectite mineral comprising the studied bentonites was montmorillonite. The octahedral Al in the structure of montmorillonite was partially substituted by Mg, and to a lesser extent by Fe. The interlayer space of montmorillonite is occupied predominantly by divalent exchangeable cations (Ca2+ and Mg2+). The dehydroxylation temperature of smectites (>600 °C) determined on the DTG curves indicates the presence of the cis-vacant variety of montmorillonites. The mean crystallite thicknesses of smectites (TMEAN) calculated by BWA analyses ranges from 7.2 to 11.5 nm. The shape of the crystallite thickness distributions (CTDs) for smectites is lognormal in all cases. Cation exchange capacity (CEC) and total specific surface area (TSSA) increases with increasing amount of smectite. The CEC of 101 meq/100g and TSSA of 616 m2/g correspond to bulk bentonite from the Stará Kremnička III deposit containing 89 wt. % of smectite.

scholarly journals SYNTHESIS, CHARACTERIZATION AND ANTIBACTERIAL ACTIVITY OF CUO NANOPARTICLES

2019 ◽  
pp. 17-20 ◽  
Author(s):  
PARDEEP KUMAR ◽  
AJINKYA GIRISH NENE ◽  
SANDEEP PUNIA ◽  
MANOJ KUMAR ◽  
ZAHOOR ABBAS ◽  
...  
Keyword(s):  
High Surface ◽  
High Surface Area ◽  
Chemical Properties ◽  
Chemical Characterization ◽  
Bacterial Strains ◽  
Cuo Nps ◽  
Bacterial Infectious Disease ◽  
Physico Chemical ◽  
Physical And Chemical ◽  
Near Future

Objective: The present study was done to see the effect of biologically synthesized CuO-NPs (Copperoxide nanoparticles) on the growth of bacterial strains. Methods: Physico-chemical characterization of CuO-NPs was done by UV-Vis-spectrophotometer, XRD, FE-SEM, and EDS. The disc plate diffusion assay was used to evaluate the anti-bacterial effect of CuNPs. Results: This study has shown a promising anti-bacterial activity of biosynthesized CuO-NPs at different concentrations ranging from 10 to 100 µg/ml against Escherichia coli and Staphylococcus aureus bacteria. Conclusion: Nanoparticles (NPs) are small size particles between range 1 to 100 nm which expand their physical and chemical properties due to high surface area. The present study reveals that there may be possible utilization of biosynthesized CuO NPs for the treatment of bacterial infectious disease in near future.

scholarly journals Methods of extraction, physicochemical properties of alginates and their applications in biomedical field – a review

2019 ◽  
Vol 17 (1) ◽  
pp. 738-762 ◽  
Author(s):  
Magdalena Beata Łabowska ◽  
Izabela Michalak ◽  
Jerzy Detyna
Keyword(s):  
Chemical Properties ◽  
Extraction Methods ◽  
Wound Management ◽  
Probiotic Properties ◽  
Food Ingredient ◽  
Variable Yield ◽  
Current State ◽  
Physico Chemical ◽  
Potential Applications

AbstractIn this paper, the current state-of-art of extraction of alginates and the determination of their physico-chemical properties as well as their overall applications focussing on biomedical purposes has been presented. The quality and quantity of the alginate obtained with a variable yield prepared from brown seaweeds as a result of many factors, such as type of algae, extraction methods, chemical modification and others. Alginates are mainly extracted by using conventional alkaline extraction. However, novel extraction techniques such as microwave and ultrasound assisted extractions have gained a lot of interest. The extraction parameters (e.g., temperature and time of extraction) have critical impact on the alginate physiochemical and mechanical properties and thus, their potential applications. By controlling a chemical process makes it possible get various forms of alginates, such as fibres, films, hydrogels or foams. It is important to characterise the obtained alginates in order to their proper applications. This article presents several techniques used for the analysis of alginate properties. These natural polysaccharides are widely used in the commercial production, as a food ingredient, in the pharmaceutical industry due to their antibacterial, anticancer and probiotic properties. Their gelling characteristic and absorbable properties enable using alginates as a wound management material. Moreover, they are also biocompatible, non-toxic and biodegradable, therefore adequate in other biomedical applications.

Regulatory Considerations of Nanotechnological Products in Developed Countries

1970 ◽  
Vol 1 (1) ◽  
pp. 25-32
Author(s):  
Karthik A Gopal V.S ◽  
Udupa N Ranjith Kumar A
Keyword(s):  
Chemical Properties ◽  
High Mobility ◽  
Developed Countries ◽  
Engineered Nanoparticles ◽  
Drug Delivery Vehicles ◽  
Safety Regulations ◽  
Physico Chemical ◽  
Potential Applications ◽  
Risk And Benefit ◽  
Inhaled Nanoparticles

Nanotechnology is a revolutionary field of micro-manufacturing involving manipulation by chemical or physical processes of individual atoms and molecules. It is important that safety regulations of nanotherapeutics keep pace with this growing level of pharmaceutical industry interest. Current and potential applications of nanotechnology in medicine range from research involving diagnostic devices, drug delivery vehicles to enhanced gene therapy and tissue engineering procedures. Safety regulations of nanotherapeutics may present unique risk assessment challenges, given the novelty and variety of products, high mobility and reactivity of engineered nanoparticles, and blurring of the diagnostic and therapeutic medicines. Major efforts are underway, however, very little attention is devoted to assessment of health risks to human or to the ecosystem. Inhaled nanoparticles have already been related to lung injury. It is recognized that physico-chemical properties in conjunction with environmental factors and stability of the nanomaterial all contribute to the overall toxicological responses. Nanotoxicological information, currently insufficient, will be vital in aiding regulatory bodies in elucidating the mechanisms of action, balancing its risk and benefit and thus to lay down the regulations. The present work is aimed at the regulatory considerations of nanoparticulate systems in various regions such as United States, European Union and Australia

Carboxylated fullerenes: Physico-chemical properties and potential applications

2017 ◽  
Vol 47-48 ◽  
pp. 19-36 ◽  
Author(s):  
Konstantin N. Semenov ◽  
Elena V. Andrusenko ◽  
Nikolai A. Charykov ◽  
Elena V. Litasova ◽  
Gayane G. Panova ◽  
...  
Keyword(s):  
Chemical Properties ◽  
Physico Chemical ◽  
Potential Applications

scholarly journals Endosulfan Resistance Profile of Soil Bacteria and Potential Application of Resistant Strains in Bioremediation

2014 ◽  
Vol 8 (1) ◽  
pp. 127-138
Author(s):  
P.K. Chandini ◽  
K.K Jaysooryan ◽  
Rinoy Varghese ◽  
K. Sreedharan ◽  
K. P. Smitha
Keyword(s):  
Experimental Period ◽  
Ecological Impacts ◽  
Bacillus Species ◽  
Resistant Bacteria ◽  
Complete Disappearance ◽  
Bacterial Strains ◽  
Pesticide Application ◽  
Physico Chemical ◽  
Resistant Strains ◽  
Removal Studies

AbstractIn the present study, bacterial strains were isolated from the soils of Wayanad District, Kerala, India and the isolates were tested for their tolerance to endosulfan and potential in bioremediation technology. Pesticide contamination in the soils, soil physico-chemical characteristics and socio-economic impacts of pesticide application were also analyzed. 28 pesticide compounds in the soil samples were analyzed and the results revealed that there was no pesticide residues in the soils. As per the survey conducted the pesticide application is very high in the study area and the level of awareness among the farmers was very poor regarding the method of application and its socio-economic and ecological impacts. A total of 9 bacterial strains were isolated with 50μg/ml of endosulfan in the isolating media and the results showed that most of the bacterial strains were highly resistance to endosulfan. Out of the 9 strains isolated 6 were highly resistant to endosulfan (500- 700μg/ml) and the other 3 isolates showed the resistance of 250-500μg/ml. From the studied isolate, isolate 9 demonstrating prolific growth and high resistance was selected to check their capability to degrade endosulfan over time. Identification of the selected strain reveals that it belongs to the genus Bacillus. Results of endosulfan removal studies showed that with increase in time, the biomass of the bacterial strains increased. The complete disappearance of endosulfan from the spiked and inoculated broth during the first day of incubation (24 hour interval) was observed. While the control flask showed the presence of endosulfan during the experimental period. Pesticide resistant bacteria are widely distributed in the soils of selected study area and the tolerance varied between bacteria even though they were isolated from the soils of the same area. The selected Bacillus species carry the ability to degrade endosulfan at accelerated rates and it could be useful in framing a bioremediation strategy for pesticide contaminated soil and water environments

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