Pinning of rotating waves to defects in finite Taylor-Couette flow

Pacheco, J.R.,Lopez, J.M.,Marques, F. CAMBRIDGE UNIVERSITY PRESS 2011 Journal of fluid mechanics Vol.666 No.-

Volatiles from Marina neglecta: Biocide effect on insect vectors of tropical diseases in Southern Mexico

Pacheco-Hernández Yesenia,Jonnathan Castro-Juárez Carlos,Alberto Ramírez-García Sergio,Cruz-Durán Ramiro,Lozoya-Gloria Edmundo,Villa-Ruano Nemesio 한국응용곤충학회 2021 Journal of Asia-Pacific Entomology Vol.24 No.2

Preventive measures based in the control of insect vectors are considered as the best choice to decrease the incidence of insect-borne diseases. Herein we report on the volatile content of the leaf essential oils from Marina neglecta, a medicinal plant distributed in the tropical regions of southern Mexico. In order to investigate the chemical variation of the essential oils, a volatile screening was performed during the four seasons of the years 2016–2019. Simultaneously, their biological activity was tested on distinct life stages of Meccus pallidipennis, M. bassolsae, Aedes aegypti and A. albopictus. Essential oils were mainly constituted of β-pinene (>30%) β-car yophyllene (>25%) and germacrene D (>13%). Dorsal-abdomen application of essential oils on triatomines, revealed an efficient LC 50 for nymphs of the stages I to III (4 µg/insect), nymphs of the stages IV to V (5–6 µg/ insect), and adults (7–8 µg/insect). The LT 50 for the stages I to III was between 6 and 8 h, whereas that for the stages IV to V and adults oscillated between 12 and 16 h and 22 to 26 h, respectively. Fumigation experiments performed on nymph V, demonstrated that 300 µg L − 1 air produced 100% mortality after 72 h post-treatment. Among tested volatiles, β-pinene and β-caryophyllene produced a comparable mortality rate (p < 0.01) than that of essential oils in the stages assayed. Essential oils showed strong larvicidal (LC 50 , 24–36 µg mL − 1 ) and adul ticidal (35–48 µg mL − 1 ) activities in mosquito species with an LT 50 of 4.5 h and 25–35 min, respectively. The evaluation of β-pinene produced a significant mortality rate (p < 0.01) in larvae whereas germacrene D was the most effective volatile (p < 0.01) against adults of both mosquito species. According to our results, β-pinene was the most effective volatile against the four insect species evaluated and its effect was comparable to that of the essential oil.

El Cancionero Folklo´rico de Me´xico, tres formas de referir lo sexual

Pacheco May, Juan Antonio 한국외국어대학교 중남미연구소 2001 중남미연구 Vol.20 No.1

The Rare and Challenging Presentation of Gastric Cancer during Pregnancy: A Report of Three Cases

Pacheco, Sergio,Norero, Enrique,Canales, Claudio,Martinez, Jose Miguel,Herrera, Maria Elisa,Munoz, Carolina,Jarufe, Nicolas The Korean Gastric Cancer Association 2016 Journal of gastric cancer Vol.16 No.4

Pregnancy-associated gastric cancer is extremely rare. In many cases, it is diagnosed at an advanced stage because the symptoms during pregnancy are generally overlooked. We report three cases of gastric cancer during pregnancy with various outcomes. The first case included a patient with stage IV gastric cancer who received palliative chemotherapy. This patient had a preterm birth and died 7 months after diagnosis. The second case received neoadjuvant chemotherapy during pregnancy and a total gastrectomy was performed after delivery. She then received adjuvant chemoradiotherapy. This patient developed pulmonary metastasis and died of recurrence 41 months after surgery. In the third case, a distal subtotal gastrectomy was performed at week 14 of pregnancy, with no complications. The patient received adjuvant chemoradiotherapy. She is currently without recurrence 14 months after surgery. In patients with pregnancy-associated gastric cancer, treatment decisions are predominantly influenced by clinical stage and gestational age at diagnosis.

Residential Mobility Over the Family Life Cycle

Pedro Pacheco Antoinette,Donovan D. Rypkema 한국노인복지학회 2007 International Journal of Welfare for the Aged Vol.16 No.-

Residential Mobility Over the Family Life Cycle-A Second Phase Study

Antoinette Pacheco,Tricia Ronda 한국노인복지학회 2014 International Journal of Welfare for the Aged Vol.30 No.-

There are many issues for considering residential changes in old life. Let us draw an example. A mountain area county is a major league city-the business, cultural, sports and technical base of a four-county metropolitan market of 1.5 million people. It is an affordable, comfortable place to live, do business and raise a family, big enough to be exciting and uncongested enough to get around in easily. It is safe, friendly and clean. In addition, its county`s many neighborhoods have much charm, and its beautiful parks are world-famous. Its lakefront downtown is busy, noted for its Old World charm and modern buildings. Residential changes will bring a life into the old home, and a sense of coming into the old life. Coming home from an extended period abroad can cause a confusing mixture of feelings, both positive and negative. Most of you probably also remember experiencing it, to one degree or another, while you were abroad. Just as with culture shock, re-entry shock encompasses a wide range of feelings and responses, from mild frustration or fatigue to feelings of alienation and depression.

Influence of hydrodynamic parameters in plate heat exchangers in ice slurry transport

Jiménez Pacheco Hugo Guillermo,Milon Guzmán Juan José,Miranda Ramos Lilia Mary,Delgado Sarmiento Pavel Kewin,Linares Flores Castro Antonio Erick,Leal Braga Sergio 대한설비공학회 2023 International Journal of Air-Conditioning and Refr Vol.31 No.1

Ice slurry is applied in different refrigeration and air conditioning systems, and among its main advantages is the ability to store latent heat and be pumpable as cold water. This fluid can be used for thermal storage instead of cold water or solid ice, since, at certain concentrations, it can be pumped through heat exchangers. For this technology to be widely used, the equipment must be designed considering the heat exchange characteristics. This study developed an experimental system to study the parameters that influence heat exchange, using ice slurry in a plate heat exchanger and water as a thermal load. Several situations with different flows and initial fractions of ice in ice slurry were analyzed. The input conditions of the thermal load were kept constant, the temperature, the pressure drop and the flow of the ice slurry in the heat exchanger were controlled, according to the Nusselt, Prandtl, and Reynolds coefficients. Results show that the global heat exchange coefficient increases with the increase of the initial ice fraction; the cooling capacity of the heat exchanger increases when ice slurry is used as a fluid. For flow rates greater than 0.16 kg/s and ice fractions above 11%, ice crystals are generated at the heat exchanger outlet, due to the ice slurry’s higher viscosity, at approximately 0.003 Pa at the outlet, since the pressure drop increases as the initial ice fraction increases. Results show ice slurry thermohydraulic behavior. Its use shows favorable characteristics in heat exchange. Ice slurry is applied in different refrigeration and air conditioning systems, and among its main advantages is the ability to store latent heat and be pumpable as cold water. This fluid can be used for thermal storage instead of cold water or solid ice, since, at certain concentrations, it can be pumped through heat exchangers. For this technology to be widely used, the equipment must be designed considering the heat exchange characteristics. This study developed an experimental system to study the parameters that influence heat exchange, using ice slurry in a plate heat exchanger and water as a thermal load. Several situations with different flows and initial fractions of ice in ice slurry were analyzed. The input conditions of the thermal load were kept constant, the temperature, the pressure drop and the flow of the ice slurry in the heat exchanger were controlled, according to the Nusselt , Prandtl , and Reynolds coefficients. Results show that the global heat exchange coefficient increases with the increase of the initial ice fraction; the cooling capacity of the heat exchanger increases when ice slurry is used as a fluid. For flow rates greater than 0.16 kg/s and ice fractions above 11%, ice crystals are generated at the heat exchanger outlet, due to the ice slurry’s higher viscosity, at approximately 0.003 Pa at the outlet, since the pressure drop increases as the initial ice fraction increases. Results show ice slurry thermohydraulic behavior. Its use shows favorable characteristics in heat exchange.

The Rare and Challenging Presentation of Gastric Cancer during Pregnancy: A Report of Three Cases

Sergio Pacheco,Enrique Norero,Claudio Canales,José Miguel Martínez,María Elisa Herrera,Carolina Muñoz,Nicolás Jarufe 대한위암학회 2016 Journal of gastric cancer Vol.16 No.4

Pregnancy-associated gastric cancer is extremely rare. In many cases, it is diagnosed at an advanced stage because the symptoms during pregnancy are generally overlooked. We report three cases of gastric cancer during pregnancy with various outcomes. The first case included a patient with stage IV gastric cancer who received palliative chemotherapy. This patient had a preterm birth and died 7 months after diagnosis. The second case received neoadjuvant chemotherapy during pregnancy and a total gastrectomy was performed after delivery. She then received adjuvant chemoradiotherapy. This patient developed pulmonary metastasis and died of recurrence 41 months after surgery. In the third case, a distal subtotal gastrectomy was performed at week 14 of pregnancy, with no complications. The patient received adjuvant chemoradiotherapy. She is currently without recurrence 14 months after surgery. In patients with pregnancy- associated gastric cancer, treatment decisions are predominantly influenced by clinical stage and gestational age at diagnosis.

A Long-term Trend of Place Mobility Over the Family Life Cycle

Antoinette Pacheco,Jolab Sorita,Hyun Sook Chang 한국노인복지학회 2013 International Journal of Welfare for the Aged Vol.28 No.-

In this study, we reviewed meaningfulness of residential mobility in old age. Some people with developmental disabilities live on their own or with their families, others live in a wide range of community residential settings where they receive their services and supports, such as: group homes, supported independent living, family model care homes, and other care facilities. People with developmental disabilities have the same right to a home as everyone else. This includes the right to choose where and with whom to live, the right to own or rent a home and the right to create a personal home environment, where choices, possessions and privacy are respected. One of the challenges in providing residential support is to create the qualities of home and ensure the rights, choices and ability of people to participate in the community are honoured and facilitated. It is safe, friendly and clean. In addition, its county`s many neighborhoods have much charm, and its beautiful parks are world-famous.

A Long-term Trend of Place Mobility Over the Family Life Cycle

Antoinette Pacheco,Jolab Sorita 한국노인복지학회 2014 International Journal of Welfare for the Aged Vol.31 No.-

In this study, we reviewed meaningfulness of residential mobility in old age. Some people with developmental disabilities live on their own or with their families, others live in a wide range of community residential settings where they receive their services and supports, such as:group homes, supported independent living, family model care homes, and other care facilities. People with developmental disabilities have the same right to a home as everyone else. This includes the right to choose where and with whom to live, the right to own or rent a home and the right to create a personal home environment, where choices, possessions and privacy are respected. One of the challenges in providing residential support is to create the qualities of home and ensure the rights, choices and ability of people to participate in the community are honoured and facilitated. It is safe, friendly and clean. In addition, its county``s many neighborhoods have much charm, and its beautiful parks are world-famous.