scholarly journals Synthesis and Test of C-Phenylcolics [4] Resorcinilate Octabenzoat Sunblock Activity

2019 ◽  
Vol 17 (2) ◽  
pp. 101-107
Author(s):  
Budiana I Gusti M. Ngurah ◽  
Ni Nyoman Yuliani
Keyword(s):  
Sun Exposure ◽  
In Vitro Test ◽  
Test Results ◽  
Reaction Products ◽  
Organic C ◽  
Infra Red ◽  
Vitro Test ◽  
Uv C

Research on the discovery of organic sunblock today continues to be intensively conducted because cases of skin cancer caused by sun exposure continue to increase from year to year. Recently, what is used to protect the skin from the dangers of sun exposure is a sunblock lotion product. This research aims to synthesize and test the new organic C-phenylcolics [4] resorcinaryl octabenzoat compound. This research is pure experimental research by testing sunblock activity using Ultraviolet-Visible Spectrophotometry. The C-phenylcallic [4] resorcinaryl octabenzoate compound was synthesized by the C-phenylcalcid [4] resorcinarene method with benzoyl chloride using a catalyst and pyridine solvent. Characterization of reaction products used infra-red spectrometers and proton-NMR. Meanwhile, testing sunblock activity was conducted in vitro using the ultraviolet spectrometry method. The synthesis results showed that C-phenylcalcid [4] resorcinyl octabenzoat was in the form of a dark yellow solid, melting point of 238-240 oC and yield of 74.10%. The in vitro test results showed that C-methylcolics [4] resorcinyl octabenzoat has a broad spectrum because it can absorb UV B and UV C rays with an SPF value of 30. This compound has the potential to be developed as a sunblock.

scholarly journals Inhibition of Biofilm Formation in Bacteria by Essential Oils: تثبيط تكون البيوفيلم في البكتيريا بواسطة الزيوت العطرية

2020 ◽  
Vol 4 (4) ◽  
Author(s):  
Mashaeal Saud Alshilawi, Howard Foster
Keyword(s):  
Essential Oils ◽  
Biofilm Formation ◽  
Research Question ◽  
In Vitro Test ◽  
Test Results ◽  
Inhibitory Effects ◽  
Anova Analysis ◽  
Black Seed ◽  
Vitro Test

The formation of S. epidermidis and P. aeruginosa biofilms were successfully inhibited in the presence of sub-inhibitory concentrations of S. aromaticum (clove) and L. angustifolia (lavender) essential oils. These substances achieved good in-vitro test results. On the other hand, pure and organic types of N. sativa (black seed) essential oil did not exhibit any inhibitory effects on the biofilm formed by the tested bacteria. Although the tested essential oils may share a similar mechanism of action, ANOVA analysis showed strong statistical differences between all essential oils at their sub-MIC levels, and also identified two different trends, biofilm inhibitors, represented by S. aromaticum (clove) and L. angustifolia (lavender) oils, and biofilm stimulators, represented by both types of N. sativa (black seed) oils. A more thorough perspective on the research question could be achieved by considering the various elements that have essentially contributed to the processes and the findings within this study.

scholarly journals In-Body Electromagnetic Sensor Combined with AI-Enhanced Electrocardiography for Pacemaker Working Status Telemonitoring

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Wu Lu ◽  
Ranran Ding ◽  
Bingjie Wu ◽  
Wenbin Zhao ◽  
Dong Huang ◽  
...  
Keyword(s):  
In Vitro Test ◽  
Test Results ◽  
Wireless Data ◽  
Wireless Data Transmission ◽  
Analog Front End ◽  
Electromagnetic Sensor ◽  
Vitro Test ◽  
Working Status ◽  
Contact Electrodes

This paper describes the design and implementation of an in-body electromagnetic sensor for patients with implanted pacemakers. The sensor can either be mounted on myocardial tissue and monitor the electrocardiography (ECG) with contact electrodes or implanted under the skin and monitor the ECG with coaxial leads. A 16-bit high-resolution analog front-end (AFE) and an energy-efficient 32-bit CPU are used for instantaneous ECG recording. Wireless data transmission between the sensor and clinician’s computer is achieved by an embedded low-power Bluetooth transmitter. In order to automatically recognize the working status of the pacemaker and alarm the episodes of arrhythmias caused by pacemaker malfunctions, pacing mode classification and fault diagnosis on the recorded ECG were achieved based on an AI algorithm, i.e., a resource allocation network (RAN). A prototype of the sensor was implemented on a human torso, and the in vitro test results prove that the sensor can work properly for the 1-4-meter transmission range.

scholarly journals Correlating Labeling Chemistry and in-vitro Test Results with the Biological Behavior of Radiolabeled Proteins

1986 ◽  
Vol 1 (3) ◽  
pp. 111-120 ◽  
Author(s):  
Suresh C. Srivastava ◽  
George E. Meinken
Keyword(s):  
Monoclonal Antibodies ◽  
Chelating Agent ◽  
Biological Behavior ◽  
In Vitro Test ◽  
Tissue Uptake ◽  
Blood Clearance ◽  
Test Results ◽  
Vitro Test

A study of the effect of various rediochemical labeling parameters on the in-vivo behavior of proteins, in particular of monoclonal antibodies, was carried out. Both radioiodination, and radiometal labeling (using protein-chelating agent conjugates), of antimelanoma, antiplatelet, and anticolon carcinoma monoclonal antibodies (222.28s, 7E3, and GA-733 respectively), as well as the direct labeling of human serum albumin with 99m Tc, were investigated. Different aspects of the biological behavior are affected in relation to the labeling chemistry involved. These include the immunoreactivity, blood clearance and tissue uptake kinetics, and rates and routes of excretion. Individual radionuclide effects have often to be addressed separately. Some antibodies are more susceptable to alteration from labeling conditions than others. Careful optimization of labeling and purification procedures is thus necessary for particular radionuclide/antibody combinations in order to obtain predictable and reproducible in-vivo results for both immunoscintigraphy and immunotherapy applications.

Synthesis and Characterization of Pure Magnesium / Bio-Glass Composite

2013 ◽  
Vol 795 ◽  
pp. 51-55
Author(s):  
Mohd Amin Farhan Zaludin ◽  
Shamsul Baharin bin Jamaludin ◽  
Nor Maizatul Shima Adzali ◽  
Norhamidi Muhammad
Keyword(s):  
Microstructural Analysis ◽  
Point Of View ◽  
Pure Magnesium ◽  
Powder Metallurgy Method ◽  
In Vitro Test ◽  
Glass Composite ◽  
Glass Density ◽  
Vitro Test

In this study, bio-glass 45S5 powder was added to pure magnesium powder to produce the magnesium/bio-glass composite by powder metallurgy method. The composite was synthesized based on 5 wt. %, 10 wt. % and 15 wt. % of bio-glass. The composite was investigated from the point of view of its microstructure, physical properties and in-vitro bioactivity. Microstructural analysis showed that bio-glass was agglomerated with increasing content of bio-glass. Density and hardness of composite increased as the content of bio-glass increased. During in-vitro test, corrosion resistance increased as the content of bio-glass increased.

scholarly journals EFEKTIVITAS SENYAWA NONATSIRI DARI Curcuma spp. TERHADAP PENEKANAN PENYAKIT ANTRAKNOSA PADA BUAH CABAI

2020 ◽  
Vol 31 (1) ◽  
pp. 21
Author(s):  
Anella Retna Kumala Sari ◽  
Firdaus Auliya Rahmah ◽  
Syamsuddin Djauhari
Keyword(s):  
Curcuma Longa ◽  
Fungal Growth ◽  
In Vitro Test ◽  
Test Results ◽  
In Vivo Test ◽  
Randomized Design ◽  
Vitro Test ◽  
Rotary Vacuum

<em></em><em>One of the important diseases on chili is anthracnose caused by </em>Colletotrichum capsici<em>. </em>Curcuma<em> extracts and </em><em>their essential oils were known as antifungal, but nonessential compounds have not been widely tested. This study aimed to assay the effectiveness of nonessential compounds of </em>Curcuma longa<em>, </em>C. zedoaria<em>, and </em>C. aeruginosa<em> to </em>C. annuum<em>. This study was conducted in November 2014 until Mei 2015 at Brawijaya University. The nonessential compound was obtained by soaking rhizome of </em>C. longa,   C.   zedoaria<em>,  and </em>C.   aeruginosa<em> in methanol, then distilled by</em><em>using rotary vacuum evaporator. Nonessential chemical compunds were identified by using HPLC. Effectiveness evaluation of nonessential compounds from three species of </em>Curcuma<em> was done by in </em>vitro<em> and </em>in vivo<em> test. Tested treatments were three species of </em>Curcuma<em> spp and 6 concentration levels of nonessential compounds (0 ppm, 4 ppm, 6 ppm, 8 ppm, 10 ppm, and</em><em> 12 ppm). The xperiment was performed in Factorial Complete Randomized Design, with 18 treatments combination, and replicated three times. Results of HPLC analysis showed the rhizomes of the three </em>Curcuma<em> species contained curcumin and </em>desmethoxycurcumin<em> in various concentrations. The highest </em><em>level was found in the </em>C. longa<em> extract (13.792 ppm curcumin and 67.156 ppm </em>desmethoxycurcumin<em>). However, in vitro test results showed nonessential compound of </em>C. zedoaria<em> was most effective in inhibiting </em>C. annuum<em> growth.  The 10 ppm concentration inhibited 81.53 % of fungal growth.  Further, the in vivo test, also indicated the same, it’s most effective in hampering the growth of anthracnose symptoms. Therefore, curcumin and </em>desmethoxycurcumin<em> from three species of </em>Curcuma<em> have potential to be developed as botanical fungicide.</em>

scholarly journals In-vitro and In-vivo Determinations of Sun Protection Factors (SPF) of Skin Lotions Containing Mountain Papaya Fruit and Mangosteen Peel Ethanolic Extract

2020 ◽  
Vol 25 (3) ◽  
Author(s):  
Heru Sasongko ◽  
Natasya Advaita ◽  
Ratih Guswinda Lestari ◽  
Karimah Umar Aidid
Keyword(s):  
Sun Exposure ◽  
Sun Protection ◽  
In Vitro Test ◽  
Garcinia Mangostana ◽  
In Vivo Test ◽  
Antioxidants Activity ◽  
Mangosteen Peel ◽  
Vitro Test

Indonesia is a high sun exposure country. Exposure to ultraviolet (UV) causes various kinds of skin disorders such as erythema, sunburn, aging, and cancer. Mountain papaya fruit (Vasconcellea pubescens A.DC.) and mangosteen peel (Garcinia mangostana L.) contains metabolite compounds that can protect the skin from sunlight because of its antioxidants activity. The purpose of this study to determine whether the combination of the mountain papaya fruit and mangosteen peel extracts in skin lotion can be used as sun protectors through the in-vitro and in-vivo study. The experiment was done by extracting the mountain papaya fruit and mangosteen peel through the maceration method. The extracts were formulated into skin lotion in three different formulas with the ratio of mountain papaya fruit extract: mangosteen peel extract as follows F1(1:1), F2(1:3), and F3(3:1). In vitro test was done by using UV-VIS spectrophotometry to determine the SPF value and in vivo test was used erythema-induced rats by exotera beam light. The result of in vitro test gained a high enough SPF value for all three formulas F1=23,23; F2=21,70 and F3=28,64 and the result of in vivo test showed that all three formulas did not indicate the existence of erythema value.         It can be concluded that three skin lotion formulas containing mountain papaya fruit and mangosteen peel ethanol extract have the effect of sun protection.

The Scientific Basis of the EYTEX™ System

1992 ◽  
Vol 20 (4) ◽  
pp. 537-548
Author(s):  
Virginia C. Gordon
Keyword(s):  
Scientific Basis ◽  
In Vitro Test ◽  
Test Results ◽  
Ocular Irritation ◽  
Oligomeric Protein ◽  
The Matrix ◽  
Vitro Test ◽  
Time Variables

The EYTEX™ system is an in vitro method for predicting in vivo ocular irritation via a target biomacromolecular approach. EYTEX™ uses changes of relevant macromolecules upon exposure to chemicals and formulations to predict in vivo irritancy and toxicity endpoints. The EYTEX™ system is based on alterations in the conformation and hydration of an ordered macromolecular matrix. An oligomeric protein with a molar mass of approximately 300,000g/mol is the major active component of the reagent. This oligomer, characterised by 12 subunits, associates itself into strands which are then incorporated into a gel network. This network also includes smaller proteins, peptides, amino acids, aminoglycans and mucopolysaccharides, which contribute to the overall response of the macromolecular matrix to a diverse array of test compounds, such as acids, bases, salts, solvents, surfactants, lubricants, preservatives, emulsions, dyes, amines, amides and many others. The method has been extensively evaluated using chemicals and formulations from diverse classes and with different ranges of toxicity, representing various mechanisms of ocular toxicity. Results using the in vitro test correlate broadly with the Draize in vivo eye irritancy test results. Quantification of the EYTEX™ method is based on measurement of changes in optical density of the matrix, which are sensitive to the conformation and hydration of protein, as well as the order in the matrix. These changes, which occur when the matrix is exposed to chemicals and formulations, can be used to predict in vivo ocular irritancy. Calibrators and controls provide assay standardisation with a 4–8% coefficient of variation. Multiple dose and time variables relating to irritancy potential can be assessed and compared with Draize in vivo results. The EYTEX™ system provides a comprehensive set of four protocols suitable for analysing chemicals and formulations with varying degrees and mechanisms of ocular irritancy.

scholarly journals Synthesis, Characterization of Ceftibuten-Copper(II) Complex and Prediction of Its Biological Activity

2020 ◽  
Vol 33 (1) ◽  
pp. 190-194
Author(s):  
Shuchismita Dey ◽  
Md. Zakir Sultan ◽  
Md. Abdus Salam
Keyword(s):  
Antibacterial Activity ◽  
Generation Cephalosporin ◽  
Salmonella Typhi ◽  
In Vitro Test ◽  
Third Generation ◽  
The Third ◽  
Vitro Test ◽  
Cephalosporin Antibiotic

Ceftibuten dihydrate, one of the third-generation cephalosporin antibiotic is effectively used in curing several infectious diseases. The complexation of drug with metal may enhance the antibacterial activity. In this work, a new complex of ceftibuten dihydrate with Cu(II) was synthesized, characterized and antibacterial activity is reported. The in vitro test showed that the antibacterial activity of complex of ceftibuten was greatly enhanced against Staphylococcus aureus and Salmonella typhi.

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