Preface

The 2nd Agrifood System International Conference (ASIC)Professor Jurnalis Kamil Convention Hall, Padang, West Sumatra, Indonesia, 8-9 November 2022"Research advancement and innovations in agroecology and smart agrifood systems.”The 2nd Agrifood System International Conference (ASIC 2022) was successfully held on 8-9 November 2022. Due to the covid-19 pandemic, this event was held virtually via the zoom platform, directly from Professor Jurnalis Kamil Convention Hall, Padang, West Sumatra, Indonesia. This event was organized by the Faculty of Agriculture, Universitas Andalas, Indonesia, and became a part of the event to commemorate the 68th anniversary of the faculty. The theme of the ASIC 2022 was: "Research advancement and innovations in agroecology and smart agrifood systems.”There have been numerous revolutions in agriculture, which have improved competency and led to record-breaking yields and gains. The latest process is "smart farming,” contributing to humanity's survival and future prosperity. Smart farming presents numerous prospects for pervasive interconnection and database computer technology as part of Industry 4.0. Smart farming is the idea of agricultural practice in a creative manner while utilizing cutting-edge technology to improve the quantity and quality of agricultural goods. New methods to assure global food safety are part of the future of the food manufacturing industry. It enables farmers to boost yields more effectively and efficiently. Fertilizers, labor, seeds, and water are just a few resources that can be saved. Smart farming has supporting applications, including land management, selection of varieties, minimizing synthetic fertilizers and pesticide inputs, and replacing them with environmentally friendly inputs. Research and related technological innovations have been carried out but have yet to be adopted and properly integrated.The main objective of this conference was to provide a venue for exchanging knowledge, scientific advancement, and innovative ideas among researchers, academicians, governments, and organizations. The scope includes plant breeding and crop production, soil management, plant protection and food safety, the socio-economic of agriculture and natural resources, and all topics related to agriculture. The committee received more than two hundred paper s coming from 46 institutions, national and international. We encourage student presenters from undergraduate to doctoral programs to present their papers;hence, around 25% of s come from them.The conference program was divided into two main segments: plenary and parallel. The plenary session invited 13 speakers from within and outside the country and was attended by 610 participants during the two days' activities. On behalf of the committee, we greatly appreciate the seven speakers contributing and sharing their knowledge at this event: Dr. Silvain R Perret, Scientific Director of CIRAD, France;Mr. Pierre Ferrand from FAO, Regional Office for Asia and the Pacific;Prof. Norman Uphoff, SRI Scientist from Cornell University, USA;Dr. Jauhar Ali, Rice hybrid breeder from IRRI, Philippines;Dr. Trevor A. Jackson, Plant protection scientist from IAPPS/ Coordinator Region XII;Prof. Shamshuddin Jusop, Soil Science Scientist from UPM, Malaysia;and Dr. Wahono: Drone creator from UMM, Indonesia. We also introduced five invited speakers from the Faculty of Agriculture: Dr. Irawati Chaniago - Crop Production;Dr. Dini Hervani - Plant Breeding;Dr. Eka Candra Lina - Plant Protection;Dr. Yuerlita - Socio-economics of Agriculture;Dr. Hery Bachrizal Tanjung - Agricultural Extension. In addition, we have provided an online workshop conducted as a side event on successfully publishing an article in IOP-EES Proceeding.Finally, let me express my sincere gratitude to all presenters, participants, and committee members who contributed significantly to this event's success. Special thanks go to the Rector of Universitas Andalas and the head of the research institute and community service of Universi as Andalas for all the support during the event. We hope to deliver the 3rd ASIC in 2024.Warmest regards,Dr. My SyahrawatiChairperson of the Organizing CommitteeList of Documentations, Conference Committee, Conference Schedule, Parallel Schedule, List of Presenters are available in this Pdf.

Role of spices in Phytomedicine - An overview

Phytomedicines are plant derived substances used for medicinal purposes with great potential and abundance. Spices have a traditional history of use as natural products that have been extensively used worldwide in healthrelated problems as well as medicinal purposes such as in enhancing immunity and providing numerous health benefits. The major spices such as small cardamom (Elettaria cardamomum Maton), pepper (Piper nigrum L.), ginger (Zingiber officinale Rosc), turmeric (Curcuma longa L), cumin (Cuminum cyminum L), mustard (Brassica nigra L) and fenugreek (Trigonella foenum-graecum) are playing important roles in phytomedicine to cure various human diseases. The active ingredients of spices which includes cardamom (1,8-cineole, alpha-terpinyl acetate, sabinene and beta-linalool), pepper (piperine), ginger (Gingerol, shogaol and zerumbone), turmeric(curcumin) and cumin (cumin aldehyde, eugenol, pinene, phenolic acids). Cardamom is coined as Queen of spices and is used for medicinal purposes both in modern and indigenous systems. Cardamom essential oil has antioxidant, antiseptic, carminative, digestive, diuretic, stimulant, stomachic, tonic, antispasmodic, anti-diabetic, antimicrobial, antiinflammatory, anti-cancer, gastroprotective and insecticidal properties. It is also used as an aphrodisiac. It is helpful in reducing the irritation endured during premenstrual strain. It works well against respiratory trouble thus helping to ease coughs and to warm up the body. The seeds of cardamom are considered to be stimulant, carminative, stomachic, diuretic, cardiotonic and abortifacient. They are useful in treating bronchitis, haemorrhoids, strangury, renal and vesical calculi, anorexia, dyspepsia and gastropathy. They are chewed to prevent bad breath and pyrosis i.e. excessive watering in the mouth. Adding powdered cardamom seeds can impart a very pleasant aroma to the tea, which is also used as medicine for scanty urination, diarrhoea, palpitation of the heart, exhaustion due to overwork and depression among other things. Pepper is often referred to as King of spices' 'and has anticancer, antimicrobial, anti- inflammatory and antiglycan properties. The antioxidant activity of black pepper comes from alkaloid-derived piperine which inhibits free radicals and reactive oxygen species, reduces lipid peroxidation and positively affects antioxidant molecules, antioxidant enzymes and cellular thiol status. Ginger is a rhizomatic spice crop containing various phenolic substances and antioxidant compounds in addition to the antioxidant properties, these compounds have antiglycan activity and other potential antidiabetic effects. In addition to this, Gingerol, shogaol and zerumbone are bioactive compounds of ginger. Gingerol is the most effective compound that has an antidiabetic activity and increases glucose uptake. Ginger is widely used for dyspepsia, flatulence, abdominal discomfort, nausea and as astringent (an agent that causes shrinkage of mucous membranes or exposed tissues and that is often used internally to check discharge of blood serum or mucous secretions) used as an alternative medicine for the inflammation treatment, low back pain and also used to treat acute tonsillitis. Turmeric is also preferred as an anti-inflammatory agent in traditional medicine for the treatment of skin disorders, wounds, digestive and liver problems. Turmeric is especially valuable for curcumin, which is one of the main components of turmeric. Curcumin together with other related pigments, gives the plant a yellow color. Chemically, these pigments are polyphenols, which are called curcuminoids. Curcumin is shown to have potential antihyperglycemic, antioxidant and immunomodulatory effects. As a traditional remedy, turmeric has also been quite extensively used for centuries to treat various disorders such as rheumatism, body ache, skin diseases, intestinal worms, diarrhoea, intermittent fevers, hepatic diseases, urinary discharges, dyspepsia, inflammations, constipation, leukoderma, amenorrhea, dental diseases, digestive problem such as dy pepsia and acidity, indigestion, flatulence, ulcers and colic inflammatory disorders such as arthritis, colitis and hepatitis. The spice crop, mustard has various bio active compounds containing carotenes, phenolic substances such as quercetin and kaempferol. Among these compounds glucosinolates have been recognized as potential anticancer agents. Cumin contains cumin aldehyde, eugenol, pinene and some other small compounds in cumin oil are active antimicrobial agents against pathogens. In addition, cumin seeds are rich in phenols and flavonoids and contain a wide spectrum of phenolic acids such as galial, cinnamic, rosmarinic, cumaric and vanillic acids. Cumin seeds are used for the treatment of dyspepsia and diarrhoea especially because of the active compound called cuminaldehyde. It is also believed that it is also used for the treatment of diabetes. Fenugreek is used as an aphrodisiac, astringent, demulcent action, carminative, stomachic, diuretic, emmenagogue, emollient, expectorant, restorative and tonic. Fenugreek also used for a variety of health situations including digestive disorders, bronchitis, tuberculosis infection, fevers, sore throat, arthritis, abscesses, swollen glands, skin irritations reaction, loss of appetite, ulcers and menopausal symptoms, diabetes as well as in the treatment of cancerous infection. Leaves infusion is used as a gargle for treatment of mouth ulcers. It also overcomes problem related to reduce blood sugar level and to lower blood pressure. In the recent Covid-19 pandemic, the mixed extracts of spices such as pepper, cardamom, clove, turmeric and ginger were found effective in reducing the Covid-19 pandemic due to the antiviral properties of these spices.

Expiratory Aerosol pH: The Overlooked Driver of Airborne Virus Inactivation.

Respiratory viruses, including influenza virus and SARS-CoV-2, are transmitted by the airborne route. Air filtration and ventilation mechanically reduce the concentration of airborne viruses and are necessary tools for disease mitigation. However, they ignore the potential impact of the chemical environment surrounding aerosolized viruses, which determines the aerosol pH. Atmospheric aerosol gravitates toward acidic pH, and enveloped viruses are prone to inactivation at strong acidity levels. Yet, the acidity of expiratory aerosol particles and its effect on airborne virus persistence have not been examined. Here, we combine pH-dependent inactivation rates of influenza A virus (IAV) and SARS-CoV-2 with microphysical properties of respiratory fluids using a biophysical aerosol model. We find that particles exhaled into indoor air (with relative humidity ≥ 50%) become mildly acidic (pH ∼ 4), rapidly inactivating IAV within minutes, whereas SARS-CoV-2 requires days. If indoor air is enriched with nonhazardous levels of nitric acid, aerosol pH drops by up to 2 units, decreasing 99%-inactivation times for both viruses in small aerosol particles to below 30 s. Conversely, unintentional removal of volatile acids from indoor air may elevate pH and prolong airborne virus persistence. The overlooked role of aerosol acidity has profound implications for virus transmission and mitigation strategies.

Effect of restricted emissions during COVID-19 on atmospheric aerosol chemistry in a Greater Cairo suburb: Characterization and enhancement of secondary inorganic aerosol production.

To prevent the rapid spreading of the COVID-19 pandemic, the Egyptian government had imposed partial lockdown restrictions which led emissions reduction. This served as ideal conditions for a natural experiment, for study the effect of partial lockdown on the atmospheric aerosol chemistry and the enhanced secondary inorganic aerosol production in a semi-desert climate area like Egypt. To achieve this objective, SO2, NO2, and PM2.5 and their chemical compositions were measured during the pre-COVID, COVID partial lockdown, and post-COVID periods in 2020 in a suburb of Greater Cairo, Egypt. Our results show that the SO2, NO2, PM2.5 and anthropogenic elements concentrations follow the pattern pre-COVID > post-COVID > COVID partial lockdown. SO2 and NO2 reductions were high compared with their secondary products during the COVID partial lockdown compared with pre-COVID. Although, PM2.5, anthropogenic elements, NO2, SO2, SO4 2-, NO3 -, and NH4 + decreased by 39%, 38-55%, 38%, 32.9%. 9%, 14%, and 4.3%, respectively, during the COVID partial lockdown compared with pre-COVID, with the secondary inorganic ions (SO4 2-, NO3 -, and NH4 +) being the dominant components in PM2.5 during the COVID partial lockdown. Moreover, the enhancement of NO3 - and SO4 2- formation during the COVID partial lockdown was high compared with pre-COVID. SO4 2- and NO3 - formation enhancements were significantly positive correlated with PM2.5 concentration. Chemical forms of SO4 2- and NO3 - were identified in PM2.5 based on their NH4 +/SO4 2- molar ratio and correlation between NH4 + and both NO3 - and SO4 2-. The particles during the COVID partial lockdown were more acidic than those in pre-COVID.

Characterization of cape gooseberry (Physalis peruviana L.) fruits from plants irrigated with different regimens and calcium doses

Cape gooseberry fruits have positioned in the world market due to their excellent nutritional characteristics, because they are an ideal food that contributes to raising the defenses of the human body and helps it to face diseases such as COVID-19, they are also a natural source of antioxidants and anticancer agents. In order to avoid the physiopathy of cracking in cape gooseberry fruits, these were characterized at harvest time, coming from greenhouse plants irrigated with different applications of water levels and irrigation frequencies, as well as different calcium doses, in a design of randomized complete blocks with 12 treatments. The blocks were the irrigation frequencies (4, 9 and 14 days), while the treatments were the combination of four irrigation coefficients (0.7, 0.9, 1.1 and 1.3 of the evaporation of the tank class A) and three doses of calcium (0, 50 and 100 kg ha-1). The plants were sown in 20 L pots with peat moss substrate. Fruits were harvested at the color stage 5 and 6 of the calyx, from 19 weeks after transplanting. The different water levels and irrigation frequencies did not significantly affect the firmness of the cape gooseberry fruits, but there was a strong tendency that cracked gooseberry fruits are less firm than healthy fruits. As the irrigation coefficient increased, the total soluble solids (TSS) increased while the total titratable acids (TTA) decreased. Irrigation frequency of 14 days generated fruits with higher TSS and pH values. The calcium doses did not affect the calcium concentration in the fruits or the TSS, TTA and pH values. Therefore, it can be concluded that incremented irrigation coefficients (up to 1.3) increase the quality of cape gooseberry fruits.

QUALITY MANAGEMENT IN THE TECHNOLOGY OF MAYONNAISE SAUCES WITH NONTRADITIONAL RAW MATERIALS

In the context of the global food crisis, deepened by the global COVID-19 pandemic, the question arises of manufacturing products with specified properties of different price categories, finding new technological solutions, using unconventional raw materials that can predict and stabilize the quality of fat products, including mayonnaise sauces, mainly of natural origin. Guar and xanthan gums were used to stabilize the quality of physicochemical properties, rheological characteristics, and improve the structure. The use of hydrocolloids in mayonnaise sauces provides important indicators, such as viscosity and stability of the emulsion. In this study, we studied the effect of the Stabilex stabilization system, which is a mixture of guar gum and xanthan, on the quality indicators of mayonnaise emulsions. It was found that to obtain the stability of mayonnaise sauce at least 97 %, it is necessary to add 56 % water, 35 % refined oil, 2.6 % Stabilex stabilization system. Chia seeds, raspberry puree, smoked paprika and greens were added to the mayonnaise sauce as non-traditional raw materials, and acetic acid was replaced by citric acid. Emulsification was performed using a high-speed blender. According to the results of previous studies, the optimal emulsification conditions were selected: temperature of the aqueous and fat phases 25–27 °C, emulsification time 5 min, mixing intensity with stirrer speed – 10–20 s-1. The studied indicator of stability of the developed mayonnaise sauces testifies that during their storage these values decrease, however do not reach critical ones. After 35 days of storage, the stability of mayonnaise sauce with smoked paprika (sample №2) is 100 %, while of the control sample – 94 %. The analysis of the obtained rheological flow curves of mayonnaise sauces shows that the best viscosity characteristics belong to the sample in the recipe of which the Stabilex stabilization system and dried herbs are included in quantities of 2.5 %. The rheological properties of mayonnaise sauce with raspberry puree and chia seeds have significantly deteriorated, indicating a lack of bond strength in the system. The use of ingredients according to the developed recipes with the Stabilex stabilization system allows to obtain recipes for mayonnaise sauces with preserved emulsion properties and high stability that meet the requirements of DSTU 4487:2015. © 2022 Oles Honchar Dnipro National University;

Physicochemical indicators of dental patient saliva who have undergone an uncomplicated coronavirus infection

Today, it has been proven that saliva is the main medium through which the new COVID-19 coronavirus infection spreads. Since the oral cavity is the gateway for the SARS-CoV-2 virus, the degree of change in the physicochemical parameters of the saliva of people who have had coronavirus infection compared to people who have not had COVID-19 is of interest. This study involved dental patients of the first and second health groups with a history of chronic generalized periodontitis of moderate degree in the stage of remission. We studied physicochemical parameters of saliva such as pH, surface tension and base buffering capacity. The results of this stage of the study showed saliva acidification, that is a decrease in pH in people who had had a new coronavirus infection compared to the indicators of people from the control group. The average values of the surface tension of saliva in patients of the control group are 30% less than in those who have had COVID-19. This indicates that the saliva of people who have not been sick with the new coronavirus contains more surface-active agents (surfactants). Surfactants provide rinsing and disinfecting functions of saliva, therefore, it can be concluded that these functions are less pronounced in patients who have recovered from COVID-19. The base buffering capacity of the saliva of patients who have had COVID-19 is, on average, 35% higher than that of people from the control group. Thus, the pH and the base buffering capacity are in correlation: the lower the pH value, the higher the acidity of the saliva and the higher the base buffering capacity is. At the second stage of the study, similar physicochemical parameters of patients’ saliva were measured after the application of an oral spray containing a synthetic peptide (ZP2) of the active center of granulo-cyte-macrophage colony-stimulating factor. This spray was used as an antibacterial therapy for the oral cavity after professional hygiene of patients. In 5 minutes after spray irrigation, an increase in saliva pH was observed in all test subjects within the physiological norm. In patients, regardless of their anamnesis, the surface tension of saliva changed in different ways. In a number of people, it increased, which indicates an increase in the concentration of surfactants in saliva, while in others it decreased, which can be explained by the high rate of penetration of surfactants from saliva through the gums into the blood. After the application of the ZP-2 peptide, the base buffering capacity of saliva decreases or remains unchanged. In patients of the control group, the indicators of the base buffering capacity of saliva change less than in patients who have undergone COVID-19. All the studied physicochemical parameters of saliva in patients who had had uncomplicated COVID-19, three months after receiving two negative results for the SARS-CoV-2 virus, remained within the physiological norm.

Elevated particle acidity enhanced the sulfate formation during the COVID-19 pandemic in Zhengzhou, China.

The significant reduction in PM2.5 mass concentration after the outbreak of COVID-19 provided a unique opportunity further to study the formation mechanism of secondary inorganic aerosols. Hourly data of chemical components in PM2.5, gaseous pollutants, and meteorological data were obtained from January 1 to 23, 2020 (pre-lockdown) and January 24 to February 17, 2020 (COVID-lockdown) in Zhengzhou, China. Sulfate, nitrate, and ammonium were the main components of PM2.5 during both the pre-lockdown and COVID-lockdown periods. Compared with the pre-lockdown period, even though the concentration and proportion of nitrate decreased, nitrate was the dominant component in PM2.5 during the COVID-lockdown period. Moreover, nitrate production was enhanced by the elevated O3 concentration, which was favorable for the homogeneous and hydrolysis nitrate formation despite the drastic decrease of NO2. The proportion of sulfate during the COVID-lockdown period was higher than that before. Aqueous-phase reactions of H2O2 and transition metal (TMI) catalyzed oxidations were the major pathways for sulfate formation. During the COVID-lockdown period, TMI-catalyzed oxidation became the dominant pathway for aqueous-phase sulfate formation because the elevated acidity favored the dissolution of TMI. Therefore, the enhanced TMI-catalyzed oxidation affected by the elevated particle acidity dominated the sulfate formation, resulting in the slight increase of sulfate concentration during the COVID-lockdown period in Zhengzhou.

Adherence to nil by mouth guidelines in a tertiary centre

Aim: Fasting before general anaesthetic aims to decrease the volume and acidity of stomach contents during surgery, which therefore reduces the risk of aspiration. This is a second cycle closed loop reaudit which had implemented Nil by mouth (NBM) guidelines during the first cycle as an intervention to improve knowledge. Preoperatively, adult patients should remain fasted for a minimum duration as below: • Solid food= 6 hours, • A cup of milky tea/ fizzy drink= 6 hours, • Clear fluids= 2 hours • Medications= 30 minutes During the second cycle interventions were included such as: teaching to junior doctors and nurses including specific teaching during induction of new surgical doctors and posters displaying the NBM guidelines were placed in surgical wards. These were carried out despite restrictions during the COVID-19 pandemic. Method: The same questionnaire was redistributed amongst staff members (nurses and HCA) throughout various surgical wards and junior doctors. Results were compared with the initial audit during this second cycle to assess whether any improvements had been made after implementation of interventions. Results: Total number of staff: • 56 (63 initial audit) • 82% - NBM for 6 hours for meals (37% initial audit), • 84% -NBM for 6 hours for drinks with particles (62% initial audit), • 91% - 2 hours as the cut off for clear fluids (58% initial audit), • 86% - 30 minutes as cut off for medications (55% initial audit). Conclusions: A significant improvement in knowledge and understanding of the NBM guidelines was demonstrated with all members of staff and practice was in accordance with NICE guidelines.

Kinetic Analysis for the Catalytic Pyrolysis of Polypropylene over Low Cost Mineral Catalysts

A kinetic analysis of non-catalytic pyrolysis (NCP) and catalytic pyrolysis (CP) of polypropylene (PP) with different catalysts was performed using thermogravimetric analysis (TGA) and kinetic models. Three kinds of low-cost natural catalysts were used to maximize the cost-effectiveness of the process: natural zeolite (NZ), bentonite, olivine, and a mesoporous catalyst, Al-MCM-41. The decomposition temperature of PP and apparent activation energy (Ea) were obtained from the TGA results at multiple heating rates, and a model-free kinetic analysis was performed using the Flynn–Wall–Ozawa model. TGA indicated that the maximum decomposition temperature (Tmax) of the PP was shifted from 464 °C to 347 °C with Al-MCM-41 and 348 °C with bentonite, largely due to their strong acidity and large pore size. Although olivine had a large pore size, the Tmax of PP was only shifted to 456 °C, because of its low acidity. The differential TG (DTG) curve of PP over NZ revealed a two-step mechanism. The Tmax of the first peak on the DTG curve of PP with NZ was 376 °C due to the high acidity of NZ. On the other hand, that of the second peak was higher (474 °C) than the non-catalytic reaction. The Ea values at each conversion were also decreased when using the catalysts, except olivine. At <0.5 conversion, the Ea obtained from the CP of PP with NZ was lower than that with the other catalysts: Al-MCM-41, bentonite, and olivine, in that order. The Ea for the CP of PP with NZ increased more rapidly, to 193 kJ/mol at 0.9 conversion, than the other catalysts.