Tópicos Sugeridos dentro de su búsqueda.
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1
artículo
This article is a casuistry review of technical reports of several filesregarding applications of patent of invention, in the technological fields of biotechnology, pharmaceutics, chemistry and engineering, where in general and specific criteria are identified and extracted on the requirements of clearness and inventive step that are evaluated in the technical report for obtaining a patent of invention in Peru.It is important to note that prior to the review of the investigated technical reports, certain definitions are provided for understanding the requirements of the technical report, such as conciseness, clearness, sufficiency, novelty and inventive step.
2
artículo
Publicado 2021
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In recent times there has been a great increase in the production of refined lead through the recycling of lead acid batteries. Their ease of collection and high reuse rates represent a sustainable alternative, only if they are carried out in a proper way. If an environmental framework is not established to ensure adequate preservation of natural resources and protection of human health, their use would not be sustainable. In this context, this study established an environmental risk analysis in all stages of the lead acid battery recycling process in order to identify possible environmental risk scenarios. The study was carried out under the methodology based on the UNE 150006-2008 standard. The results obtained reveal that at a global level there is a moderate environmental risk with a characterization of 57.5%, however, with respect to the human environment, a significant risk of 68% ...
3
artículo
Publicado 2005
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In this paper, length and weigth measurements of 20 newborn Crocodylus acutus (Cuvier, 1807) hached in a pilot farm-bred of the aquaculture center La Tuna Carranza, Puerto Pizarro, Tumbes, Peru, in 2001 are presented. The information is compared with similar reports from others places.
4
artículo
Publicado 2005
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In this paper, length and weigth measurements of 20 newborn Crocodylus acutus (Cuvier, 1807) hached in a pilot farm-bred of the aquaculture center La Tuna Carranza, Puerto Pizarro, Tumbes, Peru, in 2001 are presented. The information is compared with similar reports from others places.
5
artículo
Publicado 2022
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The lack of energy in rural areas is a problem that mainly affects developing countries. Efficient and sustainable alternatives are currently being sought that can solve this problem. The present investigation evaluated the volumetric production and biogas composition of 12 mixtures of three types of substrates (cow, pig and guinea pig manure), the substrates were characterized to know their percentage of moisture, ashes, organic matter, Kjeldahl nitrogen, C/N ratio and total metals, then the volumetric production of biogas was evaluated for 23 days in each system in triplicate and finally the composition of the biogas was analyzed, the contents of organic matter, nitrogen and C/N ratio were very similar to that reported by several authors, in the three substrates the presence of heavy metals such as copper and nickel was observed, only in cow manure was lead observed, on the other hand ...
6
artículo
Publicado 2022
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The lack of energy in rural areas is a problem that mainly affects developing countries. Efficient and sustainable alternatives are currently being sought that can solve this problem. The present investigation evaluated the volumetric production and biogas composition of 12 mixtures of three types of substrates (cow, pig and guinea pig manure), the substrates were characterized to know their percentage of moisture, ashes, organic matter, Kjeldahl nitrogen, C/N ratio and total metals, then the volumetric production of biogas was evaluated for 23 days in each system in triplicate and finally the composition of the biogas was analyzed, the contents of organic matter, nitrogen and C/N ratio were very similar to that reported by several authors, in the three substrates the presence of heavy metals such as copper and nickel was observed, only in cow manure was lead observed, on the other hand ...
7
artículo
Publicado 2023
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The objective of the study was to determine the factors associated with QRS complex alterations in domestic dogs undergoing electrocardiographic examination at a cardiological diagnosis center in Lima during the period 2018-2020. An analytical observational study was carried out. A data collection form was used to record information about the dependent variables: duration, amplitude, polarity and morphology of the QRS wave; and the independent variables: age, sex, breed size and obesity of the dog. Subsequently, a logistic regression analysis was performed to quantify the association between the classification variables and QRS complex alterations. The results showed that adult dogs were 1.74 times more likely to present QRS complex lengthening, and geriatric dogs were 2.14 times more likely to present alterations in the duration of this electrocardiographic variable compared to young do...
8
artículo
Publicado 2013
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Introduction: Poor knowledge on research shown by medical students, and the fact that they must complete their pre-graduate theses in a short time period, lead to doubts with respect to the quality of such research projects. Objective: To determine the quality of theses in order to obtain a medical degree in San Antonio Abad Cusco National University (from 2000 to 2009), and to establish if there is any factor influencing this. Materials and Method: This is a descriptive study using a relational model. The universe was 284 theses. The stratified and random simple included 172 theses. Data was retrospectively and cross-sectionally collected using a valid and reliable instrument, so their quality was assessed (methodology compliance and appropriateness), and we also reviewed the year theses were presented, the number of involved investigators, as well as the design and topics covered. We u...
9
artículo
Publicado 2013
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Introduction: Poor knowledge on research shown by medical students, and the fact that they must complete their pre-graduate theses in a short time period, lead to doubts with respect to the quality of such research projects. Objective: To determine the quality of theses in order to obtain a medical degree in San Antonio Abad Cusco National University (from 2000 to 2009), and to establish if there is any factor influencing this. Materials and Method: This is a descriptive study using a relational model. The universe was 284 theses. The stratified and random simple included 172 theses. Data was retrospectively and cross-sectionally collected using a valid and reliable instrument, so their quality was assessed (methodology compliance and appropriateness), and we also reviewed the year theses were presented, the number of involved investigators, as well as the design and topics covered. We u...
10
artículo
Publicado 2022
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The aim of this study was to determine the technological parameters of the fibre of wool and meat sheep breeds obtained by transfer of embryos imported from Australia and intended for the improvement of sheep herds in the central highlands of Peru. The study was carried out at the Casaracra Experimental Center of the Daniel Alcides Carrión National University, Junín Region, Peru, at 3772 meters above sea level. The breeds were East Friesian, Poll Dorset, Corriedale, Texel, Merino Dohne, and Finnish Landrace. The linear additive model included the factors breed, sex, age and corporal region of sampling, while the interactions were considered residual. An inverse association was found between fibre diameter and crimp curvature (-0.59) and with comfort factor (-0.98); likewise between the crimp curvature with the staple length (-0.43); On the other hand, the association was direct between...
11
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In this article the author develops the procedural treatment that receives the information obtained through collaborators in the framework of the investigation of crimes committed by criminal organizations. Thus, the different collaboration formulas and the conditions required for the former to become effective as evidence in the process will be presented and analyzed; all the above taking into account the necessary harmony with the principles that govern the prosecution of criminal cases.
12
artículo
Publicado 2023
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In this article, we describe and apply the Fay-Herriot model with spatially correlated random area effects (Pratesi & Salvati, 2006) in order to predict the prevalence of anemia and childhood stunting in Peruvian districts. This prediction is based on data from the Demographic and Family Health Survey of the year 2019, which collects information about anemia and childhood stunting in children under the age of 12 years, as well as the National Census carried out in 2017. Our main objective is to produce reliable predictions for districts with sample sizes too small to provide accurate direct estimates, as well as for districts not included in the sample. The basic Fay-Herriot model (Fay & Herriot, 1979) addresses this issue by incorporating auxiliary information, typically available from administrative or census records. The Fay-Herriot model with spatially correlated random area ...
13
artículo
Selenium-yeast is obtained by the culture of Saccharomyces cerevisiae LALVIN Bourgovin RC 212 in the medium YEPD, with sodium selenite addition (concentrations of 2 to 10 mg Se(IV)/L) during exponential growth phase, after 48 hours at 30°C and 200 rpm. Total intracellular selenium quantification in the selenium-yeast is feasible with the starch-iodine spectrophotometric method at 590 nm and the addition of 8 mg Se(IV)/L yields the most biomass, a >90% cellular viability, pink coloration and a total intracellular selenium of 738±30 mg/kg in dry basis Finally, the used methodology to find the cellular viability and the analytical method proposed to determine the total intracellular selenium are accessible for monitoring the bioprocess.
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In sexual crimes, the special characteristics of some people make them potentially vulnerable victims. Faced with the responsibility and legislative obligation to act immediately in defense of their rights and guarantee their protection, the professionals of the police and judicial context who intervene in obtaining the testimony have the challenge to adapt the procedures for obtaining and evaluating their testimonies. Previous investigations confirm misinformation and consequent police and judicial malpractice in cases of sexual abuse of especially vulnerable victims: high delay in complaints, repeated interrogations and use of inappropriate questions. This article analyzes all these influencing factors and gives some recommendations to improve the procedures for obtaining their testimonies. Finally, it warns about the possible suggestion that could derive from the misuse of procedures ...
15
artículo
Publicado 2021
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Senecio rufescens DC. is a South American Andean plant traditionally used to treat “altitude sickness” and gastrointestinal ailments. In the process of adaptation to extreme conditions, it developed its ability to biosynthesize secondary metabolites of great therapeutic importance such as phenolic compounds. Therefore, this research was developed with the objective of determining of total phenols, flavonoids, flavonols and the antioxidant capacity of the methanolic extract of the leaves and its fractions of n - hexane, dichloromethane, ethyl acetate and methanolic, respectively. The methanolic fraction showed the highest content of total phenols (149,81 ± 5,02 GAE/g of extract), flavonoids (47,33 ± 2,27 QE/g of extract) and flavonols (14,34 ± 0,69 QE/g of extract) (p <0,05), while, its antioxidant capacity (529,80 ± 14,30; 444,38 ± 11,31; 406,86 ± 24,58 μmoles ET/g of extra...
16
artículo
Publicado 2019
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The synthesis of the nanocomposite based on silver nanoparticles and O-carboxymethyl chitosan (NPsAg-CMQ), by the chemical reduction method, using the O-carboxymethylchitosan 0.01% and AgNO3 1 mM in a ratio of 3: 2, with a time of 30 minute reaction, at room temperature and neutral pH. The nanocomposite obtained from the complex [Ag(NH3)2]+ was synthesized under the same conditions as AgNO3 but at a basic pH. Using UV-VIS spectrophotometry, the plasmon formation of silver nanoparticles at 410nm was verified for both silver sources. The results by Dynamic Light Dispersion (DLS) for AgNO3, shows a monodisperse distribution of the nanocomposite with an average hydrodynamic size of 166.7 nm. In the case of the diamine silver [Ag(NH3)2] + 83.9% had an average size of 54.42 nm. and 15.2% of 4.48 nm. Infrared Spectroscopy Measurements with Fourier Transform (FT-IR) shows the inhibition of the s...
17
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Attentiveness in silver nanoparticles (AgNPs) is due to their optical, catalytic and antibacterial properties; which depend on its size, shape and colloidal stability. AgNPs can be obtained by chemical, physical and biological techniques; However, “Green Chemistry” approach promotes the development of research that does not include toxic substances or high-cost conditions in the synthesis of nanoparticles, an alternative is the use of extracts of plants, algae, fungi, bacteria and viruses as agents. reducers and stabilizers in the synthesis process. For this reason, this research employs ethanolic extracts of petals and leaves of Solanumgrandiflorum Ruiz & Pav to obtain AgNPs with a particle size less than 50 nm. Using UHPLCESI- Q-Orbitrap-MS-MS, the mayor secondary metabolites present in ethanolic extracts were identified, AgNPs were characterized by UV-Vis, FTIR, DLS and FE-SEM...
18
artículo
Publicado 2008
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The objective of the present study was to experimentally reproduce the biological cycle of Echinococcus granulosus in dogs. Twelve dogs, 4-50 months old, were infected with 80,000-308,000 protoscolices recovered from lung and liver hidatyd cysts in sheep reared in the central highlands of Peru. Dogs were slaughtered 28-39 days post infection (p.i) and the small intestine was divided in three equal portions (anterior, medium, and posterior) and parasites were counted. The location of parasites in the three portions of intestine was recorded in three dogs. Eight out of 12 dogs resulted positive to the infection and the number of parasites varied from 1,299 till 65,000 per dog. Animals slaughtered on the 28th p.i day resulted negative. The preferred site for parasites was the medium portion of the small intestine. It was shown that the oral inoculation of protoscolices from sheep hydatic cy...
19
artículo
Publicado 2022
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The wine industry produces a large amount of waste every year, this waste is generally not properly managed and becomes an environmental and sanitary hazard. On the other hand, the production of clean energies such as biogas from cattle manure has become an important energy resource. The aim of this study was to evaluate the biochar obtained by torrefaction of agricultural grape residues in the production and quality of biogas produced by anaerobic digestion of cattle manure. The study was carried out in the experimental area of the La Católica farm, located in Majes, Arequipa-Peru. A multiple factorial design composed of nine treatments was used to produce biochar, where the operating parameters were temperature and torrefaction time; and response parameters were grape residue mass yield, biogas yield and quality. The results indicate that temperature and torrefaction time significantl...
20
artículo
Publicado 2022
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The wine industry produces a large amount of waste every year, this waste is generally not properly managed and becomes an environmental and sanitary hazard. On the other hand, the production of clean energies such as biogas from cattle manure has become an important energy resource. The aim of this study was to evaluate the biochar obtained by torrefaction of agricultural grape residues in the production and quality of biogas produced by anaerobic digestion of cattle manure. The study was carried out in the experimental area of the La Católica farm, located in Majes, Arequipa-Peru. A multiple factorial design composed of nine treatments was used to produce biochar, where the operating parameters were temperature and torrefaction time; and response parameters were grape residue mass yield, biogas yield and quality. The results indicate that temperature and torrefaction time significantl...
