Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 7 de 7
Filtrar
1.
Sensors (Basel) ; 23(12)2023 Jun 06.
Artículo en Inglés | MEDLINE | ID: mdl-37420546

RESUMEN

Recent developments in quantum computing have shed light on the shortcomings of the conventional public cryptosystem. Even while Shor's algorithm cannot yet be implemented on quantum computers, it indicates that asymmetric key encryption will not be practicable or secure in the near future. The National Institute of Standards and Technology (NIST) has started looking for a post-quantum encryption algorithm that is resistant to the development of future quantum computers as a response to this security concern. The current focus is on standardizing asymmetric cryptography that should be impenetrable by a quantum computer. This has become increasingly important in recent years. Currently, the process of standardizing asymmetric cryptography is coming very close to being finished. This study evaluated the performance of two post-quantum cryptography (PQC) algorithms, both of which were selected as NIST fourth-round finalists. The research assessed the key generation, encapsulation, and decapsulation operations, providing insights into their efficiency and suitability for real-world applications. Further research and standardization efforts are required to enable secure and efficient post-quantum encryption. When selecting appropriate post-quantum encryption algorithms for specific applications, factors such as security levels, performance requirements, key sizes, and platform compatibility should be taken into account. This paper provides helpful insight for post-quantum cryptography researchers and practitioners, assisting in the decision-making process for selecting appropriate algorithms to protect confidential data in the age of quantum computing.


Asunto(s)
Seguridad Computacional , Metodologías Computacionales , Teoría Cuántica , Algoritmos , Computadores
3.
Artículo en Inglés | MEDLINE | ID: mdl-36078326

RESUMEN

With the growing scarcity of water, the remediation of water polluted with heavy metals is the need of hour. The present research work is aimed to address this problem by adsorbing heavy metals ions (Pb (II) and Cr (VI)) on modified graphene oxide having an excess of carboxylic acid groups. For this, graphene oxide (GO) was modified with chloroacetic acid to produce carboxylated graphene oxide (GO-COOH). The successful synthesis of graphene oxide and its modification has been confirmed using Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, X-ray Diffraction (XRD), Scanning electron microscopy (SEM), Energy Dispersive X-ray Analysis (EDX) and Transmission electron microscopy (TEM). The increase in surface area of graphene oxide after treatment with chloroacetic acid characterized by BET indicated its successful modification. A batch experiment was conducted to optimize the different factors affecting adsorption of both heavy metals on GO-COOH. After functionalization, we achieved maximum adsorption capacities of 588.23 mg g-1 and 370.37 mg g-1 for Pb and Cr, respectively, by GO-COOH which were high compared to the previously reported adsorbents of this kind. The Langmuir model (R2 = 0.998) and Pseudo-second-order kinetic model (R2 = 0.999) confirmed the monolayer adsorption of Pb and Cr on GO-COOH and the chemisorption as the dominant process governing adsorption mechanism. The present work shows that the carboxylation of GO can enhance its adsorption capacity efficiently and may be applicable for the treatment of wastewater.


Asunto(s)
Grafito , Metales Pesados , Contaminantes Químicos del Agua , Adsorción , Ácidos Carboxílicos , Grafito/química , Cinética , Plomo , Espectroscopía Infrarroja por Transformada de Fourier , Agua/química , Contaminantes Químicos del Agua/análisis
4.
Front Nutr ; 9: 944449, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-36159486

RESUMEN

Background: Celiac disease (CD) was considered a rare disease before and was perceivably only limited to children but now affects almost 1-2% of the global population. This abrupt increase in prevalence is due to advancements in diagnostic criteria and medical facilities but still many countries lack the basic data that can assess the severity of this health issue. The present study was conducted with the aim to assess the common but rarely diagnosed condition with the identification of its underlying secondary ailments. Materials and methods: Patients visiting public sector hospitals were recruited and tested for clinical symptoms secondary to gluten-containing foods (wheat and barley, etc.), followed by serological testing for immunoglobulin A, tissue transglutaminase A, and anti-endomysial antibodies. Only seropositive candidates were included in the endoscopic and biopsy examination for the features of villous atrophy and intestinal cell damage. The secondary ailments including anemia, growth retardation, and gastrointestinal symptoms were also documented for the tested positive patients. The modified European Society of Pediatric Gastroenterology, Hepatology, and Nutrition (ESPGHAN) criterion was followed throughout the study. Results: From 647 suspected cases from March 2018 to July 2019, 113 were confirmed with CD while 58% were female children and 42% were male children. The majority of them were from a lower class (75%) and 26% of them had a positive family history of CD. A total of 67% of patients with CD were underweight while wasting was observed in 38%, and 80% were stunted as well. Of the positively tested patients with CD, 49% had moderate anemia with 15% having severe anemia. Approximately 33% had hypoalbuminemia as well. The majority of them had a mild to severe range of gastrointestinal symptoms, such as abdominal pain, diarrhea, flatus, eructation, diarrhea, and steatorrhea. Conclusion: The study finding indicates an increased number of patients diagnosed with CD with an excessive sum of secondary ailments, such as anemia, growth failure, growth retardation, malnutrition, and gastrointestinal symptoms.

5.
Nutr Health ; 28(1): 69-76, 2022 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-34139917

RESUMEN

BACKGROUND: Cirrhosis is an irreversible disease that replaces healthy tissues with scar tissues. According to the Pakistan Medical Research Council's national general population survey (2008-2014), the ratio of cirrhosis was 4.8% among the population. OBJECTIVES: To assess the nutritional status of cirrhotic patients on enteral and parenteral nutrition and to assess the degree of malnutrition among cirrhotic patients. METHODS: A cross-sectional study was conducted at Shalamar and Shiekh Zayed Hospitals of Lahore from January-April 2017. The convenient sampling technique was used. Inclusion criteria were the patients with decompensated liver cirrhosis, whereas compensated patients were excluded from the study. Data were collected through the patient's file, nurse's, and dietitian's notes. The nutritional status of participants was assessed based on socio-demographic characteristics, anthropometric measurements, biochemical assessment, clinical signs, and dietary recall. Variables were categorized and compared to observe the level of significance in enteral and parenteral nutrition. SPSS version 22 was used to analyze data. RESULTS: Patients on parenteral nutrition had a higher ratio of malnutrition with a significant Child-Pugh score-61.8% of patients belonged to Class C and 35.3% Class B, while in enteral support, 7.3% belonged to Class C and 43.9% patients belonged to Class B (p-value = 0.000). There was a definite relationship observed in the route of intake and malnutrition among cirrhotic patients. CONCLUSION: Enteral route of nutrition is an effective and the safest way to provide appropriate nutrients according to the patient's demands.


Asunto(s)
Desnutrición , Estado Nutricional , Estudios Transversales , Nutrición Enteral/métodos , Humanos , Cirrosis Hepática/epidemiología , Desnutrición/diagnóstico , Desnutrición/epidemiología , Desnutrición/etiología , Nutrición Parenteral/métodos
6.
Infect Disord Drug Targets ; 21(6): e170721189478, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33357186

RESUMEN

Buckwheat is a gluten-free pseudo-cereal that is a part of the Polygonaceae family. Grain of buckwheat is a highly healthy component of food and has been found to have a broad variety of beneficial effects. It is cultivated as grain in a popular buckwheat (Fagopyrum esculentum) which has a secondary significance in many countries. It contains certain high-level nutritionally beneficial components and can have other characteristics as functional food. Buckwheat protein is of outstanding quality and, unlike popular cereals, is rich in essential amino acid, lysine. Health benefits of this plants include reducing plasma cholesterol level, anti-inflammatory, neuroprotective, anti-cancer, anti-diabetic effects and enhancing hypertension symptoms. Buckwheat is also used in gluten free diet in people with celiac disease and used in the alleviation of other common disease. It has also been recognized that buckwheat has a prebiotic and antioxidant activity. The key purpose of this review article is to analyze advanced work on the health benefits of buckwheat, concentrating on the particular function of its bioactive compounds and the process by which such effects are carried out.


Asunto(s)
Productos Biológicos , Fagopyrum , Neoplasias , Antioxidantes/uso terapéutico , Humanos , Neoplasias/tratamiento farmacológico , Extractos Vegetales
7.
Skeletal Radiol ; 41(5): 493-501, 2012 May.
Artículo en Inglés | MEDLINE | ID: mdl-22002099

RESUMEN

Knee replacement surgery is the most common joint replacement surgery in England and Wales. Postoperative radiographs are associated with long-term outcome at both early and late stages, and their correct interpretation is therefore vital. These radiographs will commonly be assessed by surgical trainees, emergency doctors, orthopaedic surgeons, nurse practitioners, and radiologists. The aim of this paper is to provide the reader with a systematic approach to assessing these radiographs, whether it be in the immediate postoperative period or during subsequent follow-ups, and to provide sufficient knowledge to critique the procedure. An outline of prostheses and their indications alongside a comprehensive review of the assessment of important angles, alignment, and correct positioning of femoral and tibial components is presented.


Asunto(s)
Análisis de Falla de Equipo/métodos , Prótesis de Cadera/clasificación , Articulación de la Rodilla/diagnóstico por imagen , Fémur/diagnóstico por imagen , Estudios de Seguimiento , Humanos , Periodo Posoperatorio , Diseño de Prótesis , Radiografía , Tibia/diagnóstico por imagen
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA
...